Electric drive system and control method therefor, and vehicle

Abstract

An electric drive system and a control method therefor, and a vehicle. The electric drive system comprises at least one motor (1), at least one first magnetically tunable assembly (2), and a first controller (3). The first magnetically tunable assembly is configured to tune the magnetic field strength of the motor. The first controller is configured to control the magnetically tunable assembly to tune the magnetic field strength of the motor to a target magnetically tunable interval, so as to reduce the energy consumption of the motor.

Description

Electric drive systems, vehicles and their control methods

[0001] This application claims priority to Chinese patent application No. 202410927867.5, filed on July 11, 2024; and to Chinese patent application No. 202410926156.6, filed on July 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicles, and more particularly to an electric drive system, a vehicle, and a control method thereof. Background Technology

[0003] The electric drive system is the power source of a vehicle, used to propel it forward. An electric drive system typically includes a drive motor and a generator. The drive motor converts electrical energy into mechanical energy to generate driving force. The generator converts mechanical energy into electrical energy to charge the vehicle's battery system. Furthermore, in some vehicles, the generator can also assist the drive motor in providing additional power or convert the drive motor's kinetic energy into electrical energy for storage in the battery system, achieving energy recovery and improving energy utilization efficiency. Summary of the Invention

[0004] In a first aspect, an electric drive system is provided, comprising: at least one motor, at least one first magnetic adjustment component, and a first controller. The first magnetic adjustment component is configured to adjust the magnetic field strength of the motor; the first controller is configured to control the first magnetic adjustment component to adjust the magnetic field strength of the motor to a target magnetic adjustment range.

[0005] According to some embodiments of the electric drive system disclosed herein, a first controller controls a first magnetizing component to adjust the magnetic field strength of the motor to a target magnetizing range, so that the motor of the electric drive system operates in a high-efficiency region and the energy consumption of the electric drive system is reduced.

[0006] Secondly, an electric drive system is provided. The electric drive system includes: a generator, a drive motor, a transmission mechanism, and a second magnetic adjustment component, wherein the transmission mechanism is driveably connected to the generator and the drive motor; and the second magnetic adjustment component is used to adjust the magnetic flux of at least one of the generator or the drive motor.

[0007] Thirdly, an electric drive system is provided. The electric drive system includes a drive motor, a second magnetic flux adjustment component, and a second controller, wherein the second magnetic flux adjustment component is configured to adjust the magnetic flux of the drive motor; and the second controller is configured to control the magnetic flux adjustment component to move to a target position.

[0008] Fourthly, a vehicle is provided. The vehicle includes the aforementioned electric drive system.

[0009] Fifthly, a control method for an electric drive system is provided, the electric drive system comprising: a motor and a first magnetic adjustment component, the first magnetic adjustment component being configured to adjust the magnetic field strength of the motor, the control method comprising: controlling the first magnetic adjustment component to adjust the magnetic field strength of the motor to a target magnetic adjustment range.

[0010] According to the control method of the electric drive system according to some embodiments of the present disclosure, the first magnetic adjustment component can be controlled to adjust the magnetic field strength of the motor to the target magnetic adjustment range, so that the motor of the electric drive system operates in the high-efficiency region and the energy consumption of the electric drive system is reduced.

[0011] In a sixth aspect, a vehicle control method is provided, the vehicle including the above-mentioned electric drive system, the drive motor being provided with a second magnetic adjustment component, the control method including: acquiring the torque and speed values ​​of the drive motor, determining whether the drive motor needs magnetic adjustment based on the acquisition results; when the drive motor needs magnetic adjustment, the second magnetic adjustment component operates to change the magnetic flux of the drive motor.

[0012] The drive motor is equipped with a second magnetic flux adjustment component, allowing the drive motor to adjust its magnetic flux according to different operating conditions and requirements to optimize its performance. The control method determines whether magnetic flux adjustment is needed based on the drive motor's operating status and performs appropriate control when necessary. By collecting the drive motor's torque and speed values, the drive motor's operating state and performance can be determined. Based on the collected torque and speed values, the vehicle system performs a series of calculations and comparisons using a preset algorithm or model to determine whether the current drive motor operating state requires magnetic flux adjustment. If the vehicle system determines that magnetic flux adjustment is needed, the vehicle's control unit will control the operation of the magnetic flux adjustment component to change the drive motor's magnetic flux, thereby optimizing the drive motor's performance, such as improving efficiency, reducing energy consumption, or increasing power output.

[0013] In a seventh aspect, a vehicle is provided, the vehicle including a memory, a processor, and a control program for an electric drive system stored in the memory and executable on the processor, wherein when the processor executes the control program for the electric drive system, it implements the control method for the electric drive system described above.

[0014] Eighthly, a vehicle is provided. The vehicle includes an execution module that performs the control method described above. This enables the vehicle to intelligently adjust the magnetic flux of the drive motor according to actual operating conditions and requirements, thereby optimizing the performance of the drive motor and ensuring the vehicle maintains optimal performance under various operating conditions.

[0015] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0016] Figure 1 is a schematic diagram of an electric drive system according to some embodiments;

[0017] Figure 2 is a structural diagram of the magnetizing element and the stator teeth according to some embodiments;

[0018] Figure 3 is a structural diagram of the magnetizing component and stator teeth misaligned according to some embodiments;

[0019] Figure 4 is a structural diagram of the stator and the first magnetizing assembly according to some embodiments;

[0020] Figure 5 is a structural diagram of a motor and a first magnetizing assembly according to some embodiments;

[0021] Figure 6 is a structural diagram of another motor and a first magnetizing assembly according to some embodiments;

[0022] Figure 7 is a structural diagram of another motor and a first field-adjusting assembly according to some embodiments;

[0023] Figure 8 is a schematic diagram of another electric drive system according to some embodiments;

[0024] Figure 9 is a flowchart of a control method for an electric drive system according to some embodiments;

[0025] Figure 10 is a flowchart of another control method for an electric drive system according to some embodiments;

[0026] Figure 11 is a flowchart of another control method for an electric drive system according to some embodiments;

[0027] Figure 12A is a block diagram of a vehicle according to some embodiments;

[0028] Figure 12B is a block diagram of another vehicle according to some embodiments;

[0029] Figure 13 is an architecture diagram of an electric drive system according to some embodiments;

[0030] Figure 14 is an architecture diagram of another electric drive system according to some embodiments;

[0031] Figure 15 is a flowchart of a vehicle control method for a drive motor according to some embodiments;

[0032] Figure 16 is a flowchart of a vehicle control method with respect to a generator according to some embodiments;

[0033] Figure 17 is a schematic diagram of a vehicle control method in pure electric mode according to some embodiments;

[0034] Figure 18 is a schematic diagram of a vehicle control method in hybrid mode according to some embodiments;

[0035] Figure 19 is a side view of the stator core and the magnetizing assembly of an electric drive system according to some embodiments;

[0036] Figure 20 is a structural diagram of the combination of the magnetizing element, drive ring and balance ring of the magnetizing component of an electric drive system according to some embodiments;

[0037] Figure 21 is a front view of the combination of the magnetizing element, drive ring, and balance ring of the magnetizing assembly of an electric drive system according to some embodiments;

[0038] Figure 22 is a schematic diagram of the meshing transmission between the actuating component and the adjusting wheel according to some embodiments;

[0039] Figure 23 is a block diagram of yet another vehicle according to some embodiments;

[0040] Figure 24 is a block diagram of yet another vehicle according to some embodiments.

[0041] Reference numerals: Motor 1; Motor cooling port 11; Rotor 12; Housing 13; Mounting cavity 140; Stator 17; Stator yoke 171; Stator teeth 172; First magnetic adjustment assembly 2; Magnetic adjustment component 21; Axial stator core 211; Axial stator winding 212; Actuator 22; Magnetic adjustment slot 24; Controller 3; Cooling flow path 41; First flow path 411; Second flow path 412; Third flow path 413; First pump 42; Pump outlet 421; Pump inlet 422; Valve 43; Valve inlet 431; First valve outlet 432; Second valve outlet 433; Radiator 44; Reducer 51; Differential 52; Wheel 53; Electric drive system 10; Electric drive system 60; Generator 61; Drive motor 62; Stator core 63; Stator yoke 171; Stator teeth 172; Second magnetic adjustment assembly 14, magnetic adjustment groove 24, magnetic adjustment component 21, magnetic adjustment motor 143, drive ring 144, balance ring 145, axial stator 146, actuating component 147, magnetic adjustment wheel 148; cooling channel 151, fourth flow path 152, medium cooler 1521, fifth flow path 153, first control valve 161, pressure regulating assembly 162, second control valve 163; second pump 181, third pump 182; engine 18, coupling mechanism 19. Detailed Implementation

[0042] Some embodiments disclosed below are described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the disclosure, and should not be construed as limiting the disclosure.

[0043] In the publicly available description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the publicly available description, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0045] In related technologies, the motor of an electric drive system has a fixed magnetic field strength. The fixed magnetic field strength results in a fixed high-efficiency region for the motor. When the motor operates in the high-efficiency region, the motor efficiency is high and the power consumption of the electric drive system is low. However, due to the complex and variable operating conditions of the electric drive system, the motor cannot always operate in the high-efficiency region. When the motor operates in a non-high-efficiency region to adapt to external loads, the motor efficiency will decrease and the power consumption of the electric drive system will increase.

[0046] To address the aforementioned problems, this disclosure provides an electric drive system 10, its control method, and a vehicle, among other embodiments.

[0047] The electric drive system 10, its control method, and the vehicle according to some embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0048] Referring to FIG1, an electric drive system 10 according to some embodiments of the present disclosure includes: a motor 1, a first magnetic adjustment component 2, and a controller 3. The motor 1 can be used to drive a vehicle, the first magnetic adjustment component 2 is used to adjust the magnetic field strength of the motor 1, and the controller 3 is used to control the first magnetic adjustment component 2 to adjust the magnetic field strength of the motor 1 to a target magnetic adjustment range so that the motor 1 operates in a high-efficiency region and reduces the energy consumption of the motor 1.

[0049] In some embodiments, the output shaft of the motor 1 can be connected to the wheel 53 of the vehicle. The output shaft of the motor 1 can directly drive the wheel 53 to rotate, or indirectly drive the wheel 53 to rotate through transmission components such as reducer 51, differential 52, and half shaft, so as to drive the vehicle to move.

[0050] The first magnetic adjustment component 2 can adjust the magnetic field strength of the motor 1. In other words, the first magnetic adjustment component 2 can adjust the permanent magnet magnetic field of the motor 1, enabling the motor 1 to have the advantages of both constant torque and constant power regions. While ensuring the high torque density and power density of the motor 1, it effectively expands the constant power operation range and high efficiency range of the motor 1. In addition, the first magnetic adjustment component 2 can introduce additional magnetic adjustment freedom, which helps to reduce the dependence of the armature direct-axis weak magnetic current in the high-speed region of the motor 1, thereby helping to reduce the risk of irreversible demagnetization of the magnets of the motor 1.

[0051] In addition, since the first magnetic adjustment component 2 can effectively adjust the permanent magnet magnetic field of the motor 1, the first magnetic adjustment component 2 can control the no-load back EMF and voltage of the motor 1 in real time. If the vehicle is in the low-speed range, the speed of the motor 1 is low. The no-load back EMF (i.e., permanent magnet flux) can be increased by adjusting the magnetic field, thereby increasing the torque performance and power of the motor 1 in the low-speed range. If the vehicle is in the high-speed range, the speed of the motor 1 is high. The no-load back EMF can be reduced by adjusting the magnetic field of the motor 1 in real time by the first magnetic adjustment component 2. This can not only reduce the iron core loss of the motor 1, widen the constant power range, and increase the peak torque / power in the high-speed range, but also avoid the inverter overvoltage from damaging the power devices, adding a layer of protection for the electric drive system 10.

[0052] The first controller 3 can be a vehicle control unit (VCU). The target magnetic field adjustment range can be obtained through experimental calibration. When the magnetic field strength of motor 1 is within the target magnetic field adjustment range, motor 1 operates in the high-efficiency region. The first controller 3 controls the first magnetic field adjustment component 2 to adjust the magnetic field strength of motor 1 to the target magnetic field adjustment range, so as to improve the motor efficiency of motor 1, reduce the power consumption of motor, and improve the economic efficiency of motor.

[0053] According to some embodiments of the present disclosure, in the electric drive system 10, the first controller 3 controls the first magnetizing component 2 to adjust the magnetic field strength of the motor 1 to the target magnetizing range, so that the motor 1 of the electric drive system 10 operates in the high-efficiency region and reduces the energy consumption of the electric drive system 10.

[0054] In some embodiments of this disclosure, the first controller 3 is further configured to determine a corresponding target magnetic field adjustment range based on the overall vehicle operating conditions. The target magnetic field adjustment range can be obtained through experimental calibration. When the magnetic field strength of the motor 1 is within the target magnetic field adjustment range corresponding to the overall vehicle operating conditions, the motor 1 operates in the high-efficiency region. The first controller 3 controls the first magnetic field adjustment component 2 to adjust the magnetic field strength of the motor 1 to within the target magnetic field adjustment range, thereby improving the motor efficiency of the motor 1 and achieving a high degree of matching between the high-efficiency region of the motor 1 and the overall vehicle operating conditions, thereby reducing the vehicle's power consumption and improving the vehicle's economy.

[0055] It should be noted that under different vehicle operating conditions, motor 1 has corresponding torque and speed. The magnetic field strength range corresponding to the high-efficiency region of the motor under different torque and speed conditions can be obtained through experimental calibration. This magnetic field strength range is the target magnetic field adjustment range corresponding to the vehicle operating condition. The relationship data between the vehicle operating condition and the corresponding target magnetic field adjustment range can be embedded and stored in the VCU or a storage medium that can be read by the VCU. After the first controller 3 acquires the vehicle operating condition, it can determine the target magnetic field adjustment range corresponding to the vehicle operating condition based on the stored data. The first controller 3 then controls the first magnetic field adjustment component 2 to adjust the magnetic field strength of motor 1 to within the target magnetic field adjustment range, so that the torque and speed values ​​of motor 1 under this operating condition are at the optimal efficiency point. This achieves a high degree of real-time matching between the high-efficiency region of motor 1 and the vehicle operating condition point, thereby reducing the energy consumption and heat generation of motor 1, and thus improving the vehicle's power performance and driving range.

[0056] In some embodiments of this disclosure, referring to FIG1, the first magnetic adjustment component 2 includes: a magnetic adjustment element 21 and an actuator 22. The magnetic adjustment element 21 is movably mounted on the motor 1, and the actuator 22 is connected to the magnetic adjustment element 21. The actuator 22 is used to drive the magnetic adjustment element 21 to move relative to the motor 1 to adjust the magnetic field strength of the motor 1.

[0057] In some embodiments, the magnetic adjustment component 21 is rotatably and / or movably mounted on the housing of the motor 1. The magnetic adjustment component 21 can be a soft magnetic material or a hard magnetic material. The magnetic adjustment component 21 can serve as an actuator to perform magnetic adjustment actions. When the relative position of the magnetic adjustment component 21 and the motor 1 changes, the magnetic adjustment component 21 can adjust the magnetic flux of the stator of the motor 1 or the magnetic flux of the rotor of the motor 1, so as to change the magnetic field strength of the motor 1. The actuator 22 can adjust the magnetic field strength of the motor 1 by controlling the position of the magnetic adjustment component 21 relative to the motor 1.

[0058] Referring to Figures 1, 5, and 6, according to some embodiments of the present disclosure, the magnetic adjustment element 21 is movably disposed on at least one of the stator 17 or the rotor 12 of the motor 1. The magnetic adjustment element 21 can be disposed on the stator 17 or on the rotor 12. On one hand, when the magnetic adjustment element 21 is disposed on the stator 17, by controlling the movement of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the stator 17 can be changed, thereby changing the magnetic field distribution and achieving adjustment of the magnetic flux and magnetic field strength. On the other hand, when the magnetic adjustment element 21 is disposed on the rotor 12, by adjusting the position of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the rotor 12 can be changed, thereby adjusting the magnetic flux and magnetic field strength.

[0059] According to some embodiments of this disclosure, as shown in Figures 2-4, a magnetic flux adjusting element 21 is movably disposed on the stator yoke 171 of the stator of the motor 1. An actuator 22 can drive the magnetic flux adjusting element 21 to adjust the magnetic flux passing through the stator teeth 172 of the stator. When current flows through the stator windings, a magnetic field is generated around the stator teeth 172. As the magnetic flux adjusting element 21 moves on the stator yoke 171, the magnetic flux passing through the stator teeth 172 can be directly adjusted. Through the movement of the magnetic flux adjusting element 21, as the radially facing area between the magnetic flux adjusting element 21 and the stator teeth 172 changes, continuous or segmented adjustment of the magnetic flux can be achieved, increasing the range of magnetic flux adjustment and improving its accuracy. For example, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 increases, the magnetic flux path widens, the magnetic resistance decreases accordingly, and the magnetic flux increases; conversely, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 decreases, the magnetic flux path narrows, the magnetic resistance increases accordingly, and the magnetic flux decreases.

[0060] According to some embodiments of this disclosure, there are multiple magnetic adjustment elements 21. At least some of the magnetic adjustment elements 21 can adjust the magnetic flux through the stator teeth 172 when they move. It is understood that multiple magnetic adjustment elements 21 can be adjusted in position as a whole, thereby simultaneously adjusting the magnetic flux through multiple stator teeth 172 to achieve uniform magnetic field adjustment. A portion of the multiple magnetic adjustment elements 21 can also be adjusted in position as a whole, allowing for local adjustment of the magnetic flux through specific stator teeth 172. This enables precise and wide-range adjustment of the magnetic flux through the stator teeth 172, thereby optimizing the performance of the motor 1 and ensuring that the motor 1 maintains excellent performance under different operating conditions.

[0061] According to some embodiments of this disclosure, as shown in Figures 2 and 3, a magnetic adjustment groove 24 is provided in the stator yoke 171; a magnetic adjustment element 21 is disposed in the magnetic adjustment groove 24 and can move within the magnetic adjustment groove 24 to adjust the magnetic flux passing through the stator teeth 172. The magnetic adjustment groove 24 provides movable space for the magnetic adjustment element 21, which can reduce frictional loss and improve the magnetic adjustment response speed.

[0062] According to some embodiments of this disclosure, as shown in Figures 2 and 3, the first magnetic adjustment component 2 includes a first state and a second state. In the first state, the actuator 22 drives the magnetic adjustment element 21 to move so that the magnetic adjustment element 21 is directly opposite to the stator teeth 172. In the second state, the actuator 22 drives the magnetic adjustment element 21 to move so that the magnetic adjustment element 21 is misaligned with the stator teeth 172. The first magnetic adjustment component 2 can switch between the first state and the second state to adjust the magnetic flux of the motor 1. In the first state, the magnetic adjustment element 21 is directly opposite to the stator teeth 172. At this time, the gap between the magnetic adjustment element 21 and the stator teeth 172 is minimal, the magnetic flux path is at its widest, and the magnetic resistance is relatively low, thereby allowing a larger magnetic field to pass through the magnetic circuit. When it is necessary to adjust the magnetic flux of the motor 1, the first magnetic adjustment component 2 enters the second state.

[0063] In the second state, actuator 22 drives magnetic adjustment component 21 to move, causing misalignment between magnetic adjustment component 21 and stator teeth 172. This narrows the magnetic flux path, increases magnetic resistance, and correspondingly reduces the magnetic flux. By adjusting the oil pressure, the degree of misalignment between magnetic adjustment component 21 and stator teeth 172 can be controlled, thereby achieving continuous adjustment of the magnetic flux of motor 1. In the second state, motor 1 can adjust the magnetic flux according to working requirements, achieving more flexible and efficient performance control. The first magnetic adjustment component 2 effectively adjusts the permanent magnet magnetic field, thereby enabling real-time control of the no-load back EMF of motor 1, which helps motor 1 achieve optimal performance in different speed ranges. In the low-speed range, increasing the no-load back EMF increases torque performance and power, making the vehicle more powerful at low speeds. In the high-speed range, reducing the no-load back EMF reduces core losses, widens the constant power range, increases peak torque and power, and also helps prevent inverter damage due to overvoltage.

[0064] According to some embodiments of this disclosure, as shown in Figures 5-7, the adjusting element 21 is movably disposed inside the rotor 12 of the motor 1, on one radial side of the rotor 12, or at least one axial end of the rotor 12. The adjusting element 21 can have various placement positions. For example, the adjusting element 21 can be disposed inside the rotor 12 without occupying additional space. The adjusting element 21 can also be disposed on one radial side of the rotor 12, that is, along the radial direction of the rotor 12, on the outer or inner edge of the rotor 12. The adjusting element 21 can also be disposed at least one axial end of the rotor 12, that is, the adjusting element 21 can be disposed at the upper axial end, the lower axial end, or respectively at the upper and lower axial ends of the rotor 12.

[0065] According to some embodiments of this disclosure, referring to FIG5, the magnetic flux adjusting element 21 is adapted to be movably disposed on one radial side of the rotor 12 to adjust the magnetic flux through the rotor 12. It is understood that the magnetic flux adjusting element 21 has good magnetic permeability, thereby forming a magnetic flux short-circuit loop between the magnetic flux adjusting element 21 and the rotor 12 by disposing the magnetic flux adjusting element 21 on one radial side of the rotor 12.

[0066] When motor 1 is running, the effective magnetic field generated by the permanent magnets on rotor 12 flowing to stator 17 is called the "main magnetic field". Since the total magnetic flux of the permanent magnets on rotor 12 is constant, a short-circuit loop is formed between the magnetic adjustment component 21 and rotor 12, allowing the total magnetic flux to flow to both the main magnetic field and the short-circuit loop. The magnetic flux through rotor 12 is adjusted by the first magnetic adjustment component 2 to regulate the flux in the short-circuit loop, thereby regulating the flux in the main magnetic field. This convenient adjustment allows motor 1 to have both constant torque and constant power regions, effectively expanding the constant power and high-efficiency operating areas while maintaining high torque and power densities. Furthermore, the magnetic adjustment component 21 is movably positioned on one radial side of rotor 12, facilitating the formation of a short-circuit loop between the magnetic adjustment component 21 and rotor 12, ensuring the effective magnetic adjustment of the first magnetic adjustment component 2.

[0067] The actuator 22 is connected to the magnetic adjustment element 21 and is used to adjust the overlap area between the magnetic adjustment element 21 and the rotor 12 in the axial direction.

[0068] Therefore, when the motor 1 is running, the effective magnetic field generated by the permanent magnet on the rotor 12 flowing to the stator 17 is called the "main magnetic field". Since the total magnetic flux of the permanent magnet generated by the permanent magnet on the rotor 12 is constant, a short-circuit loop is formed between the magnetic adjustment element 21 and the rotor 12, so that the total magnetic flux of the permanent magnet can flow to the main magnetic field and the short-circuit loop respectively. The actuator 22 drives the magnetic adjustment element 21 to move axially, thereby adjusting the size of the overlap area between the magnetic adjustment element 21 and the rotor 12 in the axial direction, so as to change the magnetic flux of the short-circuit loop, and thus adjust the magnetic flux of the main magnetic field. This allows the motor 1 to have the advantages of both constant torque and constant power regions, and effectively expands the constant power operation region and the high-efficiency region while ensuring high torque density and power density.

[0069] Furthermore, since the magnetic flux of the main magnetic flux in some embodiments of this disclosure is adjusted by changing the overlap area between the magnetic adjustment component 21 and the rotor 12 along the axial direction, a wider magnetic adjustment range of the first magnetic adjustment component 2 is achieved. Additionally, when the motor 1 is under heavy load, the magnetic flux of the main magnetic field is increased by the first magnetic adjustment component 2, thereby increasing the permanent magnet flux linkage and torque output. Moreover, by improving the high-efficiency region of the motor 1, a high degree of matching is achieved between the high-efficiency region of the motor 1 and the operating point of the new energy vehicle, thereby reducing the power consumption of the new energy vehicle and improving its economy.

[0070] According to some embodiments of the present disclosure, referring to FIG6, the magnetic adjustment element 21 is adapted to be movably disposed at at least one end of the rotor 12 in the axial direction to adjust the magnetic flux through the rotor 12, and the actuator 22 is connected to the magnetic adjustment element 21 to drive the magnetic adjustment element 21 closer to or away from the rotor 12.

[0071] Understandably, when motor 1 is running, the effective magnetic field generated by the permanent magnets on rotor 12 flowing to stator 17 is called the "main magnetic field". Since the total magnetic flux of the permanent magnets on rotor 12 is constant, a short-circuit loop is formed between the magnetic adjustment element 21 and rotor 12, so that the total magnetic flux of the permanent magnets can flow to the main magnetic field and the short-circuit loop respectively. The actuator 22 drives the magnetic adjustment element 21 to move closer to or away from rotor 12, adjusting the magnetic flux through rotor 12 to adjust the magnetic flux of the short-circuit loop, thereby adjusting the magnetic flux of the main magnetic field. The adjustment is convenient, thus enabling motor 1 to have the advantages of both constant torque and constant power regions, and effectively expanding the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0072] Furthermore, by changing the magnetic flux through the rotor 12 by adjusting the first magnetic adjustment component 2, the magnetic adjustment requirements of the motor 1 can be met, avoiding the problem of overcoming a large axial force due to axial movement of the rotor or stator in related technologies, making magnetic adjustment more convenient.

[0073] Furthermore, when motor 1 is under heavy load, the magnetic flux of the main magnetic field is increased by the first magnetic adjustment component 2, thereby increasing the permanent magnet flux linkage and increasing torque output. In addition, by improving the high-efficiency region of motor 1, a high degree of matching between the high-efficiency region of motor 1 and the operating point of new energy vehicles is achieved, thereby reducing the power consumption of new energy vehicles and improving their economy.

[0074] The magnetic adjustment component 21 is movably disposed at at least one end of the rotor 12 along the axial direction. It is understood that the first magnetic adjustment component 2 is provided at both ends of the rotor 12 along the axial direction. This arrangement creates two short-circuit loops in the magnetic flux, thereby improving the ability to adjust the magnetic flux of the main magnetic flux and eliminating axial unbalanced magnetic pull, further improving the reliability of the motor 1. Alternatively, as shown in Figure 6, the first magnetic adjustment component 2 is provided at one end of the rotor 12 along the axial direction. This arrangement reduces costs while achieving magnetic flux adjustment of the main magnetic flux.

[0075] For example, in the low-speed region, the actuator 22 drives the magnetic adjustment component 21 to move away from the rotor 12, thereby reducing the magnetic flux in the short-circuit loop and increasing the main magnetic flux, which in turn increases the no-load back EMF, thus improving the torque and power performance in the low-speed region. In the high-speed region, the actuator 22 drives the magnetic adjustment component 21 to move closer to the rotor 12, thereby increasing the magnetic flux in the short-circuit loop and reducing the main magnetic flux, which in turn reduces the no-load back EMF, thereby reducing the losses of the rotor 12 and stator 17, widening the constant power region, increasing the peak torque / power in the high-speed region, and achieving a wider operating range and better energy efficiency. Furthermore, it effectively prevents overvoltage damage to power devices in the inverter using this motor 1, adding a layer of protection to the electric drive system. Thus, the first magnetic adjustment component 2 achieves real-time adjustment of the main magnetic flux, thereby enabling real-time control of the no-load back EMF and voltage of the motor 1.

[0076] In addition, the motor 1 is connected to the first controller. When the motor 1 is in the medium-high speed range, the magnetic flux of the main magnetic flux is adjusted by the first magnetic adjustment component 2. This reduces the need to adjust the magnetic flux of the main magnetic flux through the armature direct shaft weakening magnetic current of the first controller, thereby reducing the risk of irreversible demagnetization of the permanent magnet and improving the reliability of the motor 1.

[0077] According to some embodiments of the present disclosure, the first magnetic adjustment component 2 is adapted to be movably disposed at at least one end of the rotor axial direction. It is connected to the magnetic adjustment component 21 through an actuator 22, which is used to drive the magnetic adjustment component 21 closer to or further away from the rotor 12 to adjust the magnetic flux through the rotor 12, thereby changing the magnetic flux of the magnetic flux short circuit loop formed by the magnetic adjustment component 21 and the rotor 12, and thus realizing the adjustment of the magnetic flux of the main magnetic field. The adjustment is convenient, so that the motor 1 using the first magnetic adjustment component 2 can have the advantages of both constant torque region and constant power region, and effectively expand the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0078] In some embodiments of this disclosure, the actuator 22 is used to drive the magnetic adjustment element 21 to move relative to the motor 1 in at least one of the axial direction, circumferential direction and radial direction of the motor 1, so as to adjust the relative position of the magnetic adjustment element 21 and the motor 1, thereby adjusting at least one of the magnetic flux of the stator or the magnetic flux of the rotor of the motor 1, thereby changing the magnetic field strength of the motor 1, adjusting the magnetic field strength of the motor 1 to the target magnetic adjustment range, and reducing the energy consumption of the motor 1.

[0079] In some embodiments of this disclosure, the magnetic adjustment element 21 is a magnetic conductor or a permanent magnet. That is, the magnetic adjustment element 21 can circulate or provide a magnetic field. When the position of the magnetic adjustment element 21 relative to the motor 1 changes, the magnetic adjustment element 21 can correspondingly change the magnetic field strength of the motor 1.

[0080] In addition, when the magnetic adjustment component 21 is a magnetic guide component, the magnetic guide component can adjust the winding inductance of the motor 1. The winding inductance of the motor 1 can be increased by the magnetic guide component, which is beneficial to reuse the motor inductance to realize the vehicle's battery self-heating or charging functions, thereby reducing current harmonics and reducing the risk of overheating and demagnetization of the magnets of the motor 1.

[0081] In some embodiments of this disclosure, the actuator 22 is a telescopic rod. The telescopic rod can extend or retract to drive the magnetic adjustment component 21 to move along the axial or radial direction of the motor 1, thereby adjusting the relative position of the magnetic adjustment component 21 and the motor 1, and thus adjusting the magnetic field strength of the motor 1. For example, the telescopic rod can be an electric telescopic rod, a hydraulic telescopic rod, a pneumatic telescopic rod, or other similar mechanisms.

[0082] In some other embodiments of this disclosure, the actuator 22 is an actuating motor, which can drive the magnetic adjustment element 21 to rotate radially outward around the axis of the motor 1, thereby adjusting the relative position of the magnetic adjustment element 21 and the motor 1, and realizing the adjustment of the magnetic field strength of the motor 1.

[0083] In some other embodiments of this disclosure, the actuator 22 is a robotic arm with multiple drive shafts. The robotic arm can drive the magnetic adjustment element 21 to move relative to the motor 1 in at least one of the axial, circumferential, and radial directions by rotating its multiple drive shafts, so as to adjust the relative position of the magnetic adjustment element 21 and the motor 1 and realize the adjustment of the magnetic field strength of the motor 1.

[0084] In other embodiments of this disclosure, the actuator 22 may be a combination of an actuating motor and an electric telescopic rod. The actuator 22 may drive the magnetic adjustment element 21 to perform compound movements. For example, the actuator 22 may convert the radial movement of the magnetic adjustment element 21 along the motor 1 to the axial movement along the motor 1. Or, for another example, the actuator 22 may convert the rotation of the magnetic adjustment element 21 along the axis of the motor 1 to the axial movement along the motor 1, so as to achieve diversified adjustment of the magnetic field strength of the motor 1.

[0085] In some embodiments of this disclosure, referring to FIG7, the motor 1 includes a rotor 12 and a housing 13. The housing 13 has a mounting cavity 140 inside, and the rotor 12 is rotatably mounted in the mounting cavity 140. The first magnetic adjustment component 2 is a component that adjusts the air gap magnetic field of the motor 1 by changing the leakage flux of the permanent magnet. The first magnetic adjustment component 2 is disposed in the housing 13. The first magnetic adjustment component 2 is adapted to be disposed at at least one axial end of the rotor 12. The position of the first magnetic adjustment component 2 in the circumferential and / or radial direction of the rotor 12 is adjustable to adjust the magnetic flux through the rotor 12.

[0086] For example, the position of the first magnetic adjustment component 2 in the circumferential direction of the rotor 12 can be adjusted. For example, the first magnetic adjustment component 2 can rotate relative to the rotor 12 to change the relative position of the first magnetic adjustment component 2 and the rotor 12.

[0087] For example, the position of the first magnetic adjustment component 2 in the radial direction of the rotor 12 can be adjusted. For instance, the first magnetic adjustment component 2 can be moved radially relative to the rotor 12 to change the relative position of the first magnetic adjustment component 2 and the rotor 12.

[0088] For example, the position of the first magnetic adjustment component 2 in both the circumferential and radial directions of the rotor 12 can be adjusted. For instance, the first magnetic adjustment component 2 can rotate relative to the rotor 12 while also moving radially to change the relative position of the first magnetic adjustment component 2 and the rotor 12.

[0089] In some embodiments, referring to FIG7, the first magnetic adjustment assembly 2 may include a magnetic adjustment element 21 and an actuator 22, the actuator 22 being used to drive the magnetic adjustment element 21 to rotate circumferentially about the rotor 12 and / or move radially in the rotor 12.

[0090] In some embodiments, the magnetic adjustment element 21 is operated in a circumferential manner. When the magnetic adjustment element 21 rotates around the circumference, the circumferential position of the magnetic adjustment element 21 changes, thereby realizing the phase adjustment between the magnetic adjustment element 21 and the magnetic poles of the rotor 12, and realizing the effective adjustment of the working magnetic field of the motor 1.

[0091] It is understandable that "rotating the magnetic adjustment element 21 around the circumference" refers to the rotation of the magnetic adjustment element 21 around the axis of the magnetic adjustment element 21. The magnetic adjustment element 21 is arranged coaxially with the rotor 12. Therefore, "rotating the magnetic adjustment element 21 around the circumference" also refers to the rotation of the magnetic adjustment element 21 around the axis of the rotor 12.

[0092] In other embodiments, the magnetic adjustment element 21 is operated radially. When the magnetic adjustment element 21 moves radially in the rotor 12, the radial position of the magnetic adjustment element 21 changes, thereby realizing the phase adjustment between the magnetic adjustment element 21 and the magnetic poles of the rotor 12, and realizing the effective adjustment of the working magnetic field of the motor 1.

[0093] In some other embodiments, the magnetic adjustment element 21 is operated by a combination of circumferential and radial movements. The circumferential and radial positions of the magnetic adjustment element 21 are changed, thereby realizing the phase adjustment between the magnetic adjustment element 21 and the magnetic poles of the rotor 12, and realizing the effective adjustment of the working magnetic field of the motor 1.

[0094] The first magnetic adjustment component 2 is located at the axial end of the rotor 12, which can effectively utilize the space at the end of the rotor 12 and improve the space utilization rate of the motor 1.

[0095] In the above embodiments, by setting the position of the first magnetic adjustment component 2 in the circumferential and / or radial direction of the rotor 12 to be adjustable, the relative position of the first magnetic adjustment component 2 and the rotor 12 can be adjusted, thereby realizing the effective adjustment of the magnetic flux of the rotor 12, and thus realizing the effective adjustment of the working magnetic field of the motor 1.

[0096] In some embodiments of this disclosure, referring to FIG7, the magnetic adjustment element 21 includes an axial stator 146, and the actuator 22 can drive the magnetic adjustment element 21 to move to adjust the relative position of the rotor and the axial stator, so as to achieve effective adjustment of the working magnetic field of the motor 1.

[0097] In some embodiments, the axial stator includes an axial stator core 211 and an axial stator winding 212. The axial stator core 211 includes an axial stator yoke and an axial stator tooth, which are fixedly connected. The axial stator yoke is drivenly connected to the actuator 22, and the axial stator winding 212 is wound around the axial stator tooth. By providing the axial stator yoke and the axial stator tooth, the fixing function and the winding function of the axial stator core 211 are separated and do not interfere with each other, making the structure of the axial stator core 211 more reasonable.

[0098] In some embodiments, the axial stator core 211 may be formed by winding steel sheets, thereby reducing iron loss and further improving the efficiency of the motor 1.

[0099] In some embodiments of this disclosure, referring to FIG8, there are multiple motors 1 and first magnetic adjustment components 2, with each motor 1 corresponding to at least one first magnetic adjustment component 2. The first controller 3 can be used to determine the target magnetic adjustment range corresponding to each motor 1 according to the overall vehicle operating conditions, and control the first magnetic adjustment component 2 to adjust the magnetic field strength of the corresponding motor 1 to the target magnetic adjustment range, so that each motor 1 works in the high-efficiency region and reduces the energy consumption of the motor 1.

[0100] In some embodiments of this disclosure, the electric drive system 10 further includes a cooling assembly for regulating the temperature of the motor 1. The cooling assembly can cool the motor 1 to reduce its temperature and prevent it from overheating and affecting its performance, thereby improving the reliability and service life of the motor 1.

[0101] In some embodiments of this disclosure, the first controller 3 is further configured to determine the heat generation power corresponding to the motor 1 according to the target magnetic adjustment range, so that the cooling power of the cooling component matches the heat generation power. That is, the first controller 3 controls the cooling power of the cooling component to match the heat generation power, so that the motor 1 operates at a suitable temperature and the energy consumption of the cooling component is reduced.

[0102] In some embodiments, the correspondence between the target magnetic adjustment range and the heat generation power, as well as the correspondence between the heat generation power and the cooling power, can be obtained through experimental calibration. The motor has its own corresponding motor efficiency in each target magnetic adjustment range. Furthermore, motor efficiency and the motor's heat generation power are negatively correlated; that is, the higher the motor efficiency, the lower the heat generation power of motor 1, and the lower the cooling power required for motor 1 to dissipate heat; conversely, the lower the motor efficiency, the higher the heat generation power of motor 1, and the higher the cooling power required for motor 1 to dissipate heat. After the first magnetic adjustment component 2 adjusts the magnetic field strength of motor 1, the motor efficiency of motor 1 increases, the heat generation power decreases, and the cooling power required by motor 1 also decreases accordingly. When the cooling power of the cooling component matches the heat generation power, the heat dissipation of motor 1 by the cooling component approaches the same as the heat generated by motor 1, thus avoiding excessive cooling power of the cooling component and wasting energy, and ensuring that motor 1 operates at a suitable temperature.

[0103] In some embodiments of this disclosure, referring to FIG1, the cooling assembly includes a cooling flow path 41 and a first pump 42. The cooling flow path 41 is connected to the motor 1, and the first pump 42 is disposed in the cooling flow path 41. The cooling flow path 41 can be a low-pressure flow path. The first pump 42 can pump a medium to the motor cooling port 11 of the motor 1 through the cooling flow path 41 to cool and lubricate the motor 1.

[0104] In some embodiments of this disclosure, the first controller 3 can adjust the cooling power of the cooling assembly by controlling the pumping power of the first pump 42 using Proportional Integral Derivative (PID) control. For example, the first pump 42 can be an electric pump that converts electrical energy into hydraulic energy, and the pumping power of the first pump 42 is positively correlated with the cooling power of the cooling assembly. When it is necessary to increase the cooling power, the pumping power of the first pump 42 can be increased to increase the flow rate of the medium from the cooling flow path 41 to the motor 1, thereby improving the cooling effect of the cooling assembly on the motor 1. When it is necessary to decrease the cooling power, the pumping power of the first pump 42 can be reduced to decrease the flow rate of the medium from the cooling flow path 41 to the motor 1, thereby reducing the energy consumption of the first pump 42.

[0105] In some embodiments of this disclosure, the cooling flow path 41 is also connected to the reducer 51. The first pump 42 can pump a medium to the reducer 51 through the cooling flow path 41. This medium can be a heat exchange lubrication medium such as oil, so as to cool and lubricate the gears in the reducer 51.

[0106] In some embodiments of this disclosure, referring to FIG1, the cooling assembly further includes a valve 43, which is disposed in the cooling flow path 41 and located between the first pump 42 and the motor 1. The valve 43 is used to adjust the flow rate of the medium flowing from the cooling flow path 41 to the motor 1, so as to adjust the cooling power of the cooling assembly and achieve rapid adjustment of the cooling power.

[0107] For example, when the cooling assembly cools the motor 1, the first pump 42 pumps the medium to the motor 1 through the cooling flow path 41. The valve 43 provided on the cooling flow path 41 can adjust the flow rate of the medium from the cooling flow path 41 to the motor 1. When it is necessary to increase the cooling power, the opening of the valve port connecting the valve 43 to the motor 1 can be increased to increase the flow rate of the medium from the cooling flow path 41 to the motor 1, thereby improving the cooling effect of the cooling assembly on the motor 1. When it is necessary to reduce the cooling power, the opening of the valve port connecting the valve 43 to the motor 1 can be reduced to reduce the flow rate of the medium from the cooling flow path 41 to the motor 1. The valve 43 can be an overflow circulation valve driven by electromagnetic force. The valve 43 has a fast response speed and can quickly adjust the cooling power of the cooling assembly without changing the pumping power of the first pump 42, thereby improving the response speed of the cooling assembly and reducing the complexity of cooling power adjustment.

[0108] In some embodiments of this disclosure, referring to FIG1, the first pump 42 is connected to the motor 1 via a transmission connection. The motor 1 can drive the working parts of the first pump 42 for pumping media to move, so that the first pump 42 converts mechanical energy into hydraulic energy to realize the pumping function. For example, the output shaft of the motor 1 is mechanically connected to the impeller of the first pump 42 via a reducer 51. When the motor 1 is working, the motor 1 can synchronously drive the impeller of the first pump 42 to rotate, so that the first pump 42 pumps media to the motor 1, thereby cooling the motor 1.

[0109] In some embodiments of this disclosure, referring to FIG1, the cooling flow path 41 includes: a first flow path 411 and a second flow path 412. The two ends of the first flow path 411 are respectively connected to the first pump 42 and the valve 43, and the two ends of the second flow path 412 are respectively connected to the valve 43 and the motor 1. Thus, the valve 43 can adjust the cooling power of the cooling component by adjusting the flow rate of the medium from the first flow path 411 to the second flow path 412.

[0110] In some embodiments of this disclosure, referring to FIG1, the cooling flow path 41 further includes a third flow path 413, the two ends of which are connected to the valve 43 and the first pump 42 respectively. When adjusting the cooling power of the cooling component, the pumping power of the first pump 42 can remain unchanged. Excess medium flowing into the valve 43 through the first flow path 411 can be returned through the third flow path 413 to reduce the energy consumption of the cooling component and reduce the difficulty of the first controller 3 in controlling the cooling power of the cooling component.

[0111] In some embodiments of this disclosure, referring to FIG1, the first pump 42 has a pump outlet 421 and a pump inlet 422, and the valve 43 has a valve inlet 431, a first valve outlet 432 and a second valve outlet 433. The valve inlet 431 is connected to the pump outlet 421 through a first flow path 411, the first valve outlet 432 is connected to the motor 1 through a second flow path 412, and the second valve outlet 433 is connected to the pump inlet 422 through a third flow path 413. The valve 43 is used to regulate the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and the second valve outlet 433. The first controller 3 can adjust the cooling power of the cooling component by controlling the valve 43 to achieve simple and fast adjustment of the cooling power and reduce the difficulty of the first controller 3 in controlling the cooling power of the cooling component.

[0112] In some embodiments, the pump inlet 422 of the first pump 42 may be connected to at least one of the oil pans of the motor 1 or the reducer 51. When the cooling assembly is working, the first pump 42 pumps the medium from the pump inlet 422 to the pump outlet 421, so that the medium enters the valve inlet 431 of the valve 43 through the first flow path 411. The valve 43 can adjust the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and the second valve outlet 433. That is, the medium flowing in from the first pump 42 can be diverted by the valve 43 to the first valve outlet 432 and the second valve outlet 433. The medium flowing out from the first valve outlet 432 flows into the motor 1 through the second flow path 412, and the medium flowing out from the second valve outlet 433 flows to the pump inlet 422 of the first pump 42 through the third flow path 413. When it is necessary to increase the cooling power, the first controller 3 can control the valve 43 to increase the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and decrease the flow rate of the medium from the valve inlet 431 to the second valve outlet 433. When it is necessary to reduce cooling power, the first controller 3 can control the valve 43 to reduce the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and increase the flow rate of the medium from the valve inlet 431 to the second valve outlet 433.

[0113] For example, motor 1 can drive first pump 42 to provide a medium flow rate of 15L / min to valve inlet 431 of valve 43. First controller 3 determines that the medium flow rate corresponding to the cooling power matching the current heating power is 10L / min. First controller 3 can control valve 43 to change the oil flow rate from valve inlet 431 to first valve outlet 432 to 10L / min to meet the cooling requirements of motor 1. The medium flow rate from valve inlet 431 to second valve outlet 433 is 5L / min. This 5L / min medium flow rate is a surplus flow rate and can flow back to pump inlet 422 of first pump 42 through third flow path 413 for first pump 42 to suck in again. This can realize the recovery and utilization of surplus flow rate, reduce the energy consumed by motor 1 to drive first pump 42, and reduce the hydraulic energy consumption of cooling components. Furthermore, when adjusting the cooling power of the cooling component, the power of the first pump 42 can remain unchanged, and the first controller 3 can adjust the cooling power of the cooling component through the control valve 43 to achieve simple and quick adjustment of the cooling power, thereby reducing the difficulty of the first controller 3 in controlling the cooling power of the cooling component.

[0114] In some embodiments of this disclosure, the cooling assembly further includes a radiator 44, which is disposed in the second flow path 412. The medium flowing through the second flow path 412 can be cooled by the radiator 44 to ensure the cooling effect of the medium on the motor 1. For example, the radiator 44 can be an oil cooler.

[0115] It is understandable that the oil cooler can exchange heat with the outside world through air cooling, liquid cooling or other methods. The medium flowing through the second flow path 412 can be cooled by the oil cooler. The cooled medium can flow into the motor 1 and the reducer 51 to cool the gears of the motor 1 and the reducer 51.

[0116] Some embodiments of this disclosure will now be described in detail with reference to Figures 1 and 9.

[0117] Referring to Figure 1, the vehicle's motor system includes: a motor 1, a first magnetizing assembly 2, a cooling assembly, and a first controller 3.

[0118] The motor 1 is connected to the reducer 51 for transmission. The reducer 51 can reduce the power output of the motor 1 and increase the torque before transmitting it to the differential 52, so that the differential 52 drives the wheel 53 to rotate through the half shaft. In addition, the reducer 51 can reduce the power output of the motor 1 and increase the torque before transmitting it to the first pump 42 of the cooling assembly, so that the first pump 42 pumps the medium to the motor 1.

[0119] The first magnetic adjustment component 2 is used to adjust the magnetic field strength of the motor 1. The first magnetic adjustment component 2 includes: a magnetic adjustment element 21 and an actuator 22. The magnetic adjustment element 21 is movably mounted on the motor 1. The actuator 22 is connected to the magnetic adjustment element 21. The actuator 22 is used to drive the magnetic adjustment element 21 to move relative to the motor 1 in order to adjust the magnetic field strength of the motor 1.

[0120] The cooling assembly is used to regulate the temperature of motor 1. The cooling assembly includes a cooling flow path 41, a first pump 42, a valve 43, and a radiator 44. The cooling flow path 41 is connected to motor 1. The first pump 42, valve 43, and radiator 44 are all located within the cooling flow path 41. The first pump 42 has a pump outlet 421 and a pump inlet 422. The cooling flow path 41 includes a first flow path 411, a second flow path 412, and a third flow path 413. The valve 43 has a valve inlet 431, a first valve outlet 432, and a second valve outlet 433. The valve inlet 431 is connected to the first pump outlet 422. The first flow path 411 is connected to the pump outlet 421. The first valve outlet 432 is connected to the motor 1 through the second flow path 412. The radiator 44 can be located in the second flow path 412 and between the first valve outlet 432 and the motor 1. The second valve outlet 433 is connected to the pump inlet 422 through the third flow path 413. The valve 43 is used to regulate the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and the second valve outlet 433, so as to regulate the flow rate of the medium from the cooling flow path 41 to the motor 1, thereby regulating the cooling power of the cooling component.

[0121] The first controller 3 is used to determine the corresponding target magnetic adjustment range according to the overall vehicle operating conditions, and control the first magnetic adjustment component 2 to adjust the magnetic field strength of the motor 1 to the target magnetic adjustment range so that the motor 1 works in the high-efficiency range. The first controller 3 is also used to determine the corresponding heat generation power of the motor 1 according to the target magnetic adjustment range, and control the cooling power of the cooling component to match the heat generation power so that the motor 1 works at a suitable temperature.

[0122] In some embodiments, the first controller 3 may include a memory, a processor, and a control program for the electric drive system 10 stored in the memory and executable on the processor. When the processor executes the control program for the electric drive system 10, it implements a control method for the electric drive system 10. Referring to FIG9, the control method for the electric drive system 10 includes S1 to S7.

[0123] Step S1: Obtain the vehicle operating conditions.

[0124] Step S2: Determine the motor torque and speed based on the overall vehicle operating conditions.

[0125] There is a fixed correspondence between the overall vehicle operating conditions and the torque and speed of motor 1. The correspondence between the overall vehicle operating conditions and the torque and speed of motor 1 can be obtained through experimental calibration and stored in the memory. After acquiring the overall vehicle operating conditions, the first controller 3 can determine the corresponding torque and speed of motor 1.

[0126] Step S3: Determine the target magnetic adjustment range based on the motor's torque and speed.

[0127] The target magnetic field range is the magnetic field strength of motor 1 in the high-efficiency region under the current torque and speed conditions. The correspondence between the torque and speed of motor 1 and the target magnetic field range can be obtained through experimental calibration and stored in the memory. After obtaining the torque and speed of motor 1, the first controller 3 can determine the corresponding target magnetic field range. In other words, the first controller 3 can determine the corresponding target magnetic field range according to the overall vehicle operating conditions.

[0128] Step S4: Determine the target position of the magnetic adjustment component based on the target magnetic adjustment range.

[0129] The target magnetic adjustment range and the target position of the magnetic adjustment component 21 have a fixed correspondence. The correspondence between the target magnetic adjustment range and the target position of the magnetic adjustment component 21 can be obtained through experimental calibration and stored in the memory. After obtaining the target magnetic adjustment range, the first controller 3 can determine the target position corresponding to the magnetic adjustment component 21.

[0130] Step S5: Control the actuator to drive the magnetic adjustment component to move to the target position.

[0131] The first controller 3 can communicate with the actuator 22. The first controller 3 can send an actuation signal corresponding to the target position to the actuator 22 to control the actuator 22 to drive the magnetic adjustment component 21 to move to the target position. In addition, the actuator 22 can feed back the current position signal of the magnetic adjustment component 21 to the first controller 3 in real time, so that the first controller 3 can accurately control the magnetic adjustment component 21 to move to the target position through the actuator 22. When the magnetic adjustment component 21 moves to the target position, it can adjust the magnetic field strength of the motor 1 to within the target magnetic adjustment range, so that the motor 1 operates in the high-efficiency region under the current operating conditions, thereby improving the motor efficiency of the motor 1 and reducing the heat generation of the motor 1.

[0132] Step S6: Determine the target valve opening degree based on the target location and the medium flow rate of the second flow path.

[0133] The first controller 3 can determine the target magnetic adjustment range based on the target position, then determine the motor efficiency based on the target magnetic adjustment range, and then determine the heat generation power of the motor 1 based on the motor efficiency, and finally determine the cooling power required by the motor 1 based on the heat generation power of the motor 1.

[0134] In addition, the first controller 3 can communicate with the valve 43 and the radiator 44 respectively. The first controller 3 can obtain the medium flow rate of the second flow path 412 by acquiring the flow signal or pressure signal of the radiator 44. The first controller 3 can determine the current cooling power of the cooling component to the motor 1 based on the medium flow rate of the second flow path 412. The first controller 3 can evaluate the adjustment amount of the medium flow rate of the second flow path 412 by comparing the difference between the heating power of the motor 1 and the current cooling power, and then determine the target opening degree corresponding to the valve 43, that is, determine the medium flow rate (the medium flow rate corresponding to the cooling power required by the motor 1) from the valve inlet 431 controlled by the valve 43 to the first valve outlet 432 and the medium flow rate (overflow flow) of the second valve outlet 433.

[0135] Step S7: Control the valve to achieve the target opening degree.

[0136] After control valve 43 achieves the target opening degree, the cooling power of the cooling component matches the heat generation power of motor 1, so that motor 1 operates at a suitable temperature. It should be noted that steps S1 to S5 can be performed using PID cyclic control, that is, steps S1 to S5 can be executed cyclically according to the PID algorithm, so that motor 1 always operates in a high-efficiency range that matches the current vehicle operating conditions, and the cooling power of the cooling component matches the current heat generation power of the motor.

[0137] Some embodiments of this disclosure will now be described in detail with reference to Figures 8 and 10.

[0138] Referring to Figure 8, the vehicle's motor system includes: multiple motors 1, multiple first magnetizing components 2, a cooling component, and a first controller 3, with the multiple motors 1 and the multiple first magnetizing components 2 corresponding one-to-one.

[0139] Each motor 1 is driven by a corresponding reducer 51 to drive different wheels 53 to rotate. For example, when multiple motors 1 include two motors 1, one of the two motors 1 can drive the front wheels of the vehicle to rotate via its corresponding reducer 51, and the other motor 1 of the two motors 1 can drive the rear wheels of the vehicle to rotate via its corresponding reducer 51. In addition, at least one reducer 51 is driven by a first pump 42 of the cooling assembly to enable the first pump 42 to pump media.

[0140] Each first magnetic adjustment component 2 is used to adjust the magnetic field strength of the corresponding motor 1. The first magnetic adjustment component 2 includes: a magnetic adjustment element 21 and an actuator 22. The magnetic adjustment element 21 is movably mounted on the corresponding motor 1. The actuator 22 is connected to the magnetic adjustment element 21 and is used to drive the magnetic adjustment element 21 to move relative to the corresponding motor 1 in order to adjust the magnetic field strength of the corresponding motor 1.

[0141] The cooling assembly is used to regulate the temperature of each motor 1. The cooling assembly includes a cooling flow path 41, a first pump 42, a valve 43, and a radiator 44. The cooling flow path 41 is connected to each motor 1. The first pump 42, valve 43, and radiator 44 are all located in the cooling flow path 41. The first pump 42 has a pump outlet 421 and a pump inlet 422. The cooling flow path 41 includes a first flow path 411, a second flow path 412, and a third flow path 413. The valve 43 has a valve inlet 431, a first valve outlet 432, and a second valve outlet 433. The valve inlet 431 is connected to the first flow path 41. 1. The pump outlet 421 is connected, and the first valve outlet 432 is connected to each motor 1 through the second flow path 412. The radiator 44 can be located in the second flow path 412 and between the first valve outlet 432 and the motor 1 near the first valve outlet 432. The second valve outlet 433 is connected to the pump inlet 422 through the third flow path 413. The valve 43 is used to regulate the flow rate of the medium from the valve inlet 431 to the first valve outlet 432 and the second valve outlet 433, so as to regulate the flow rate of the medium from the cooling flow path 41 to each motor 1, thereby regulating the cooling power of the cooling component.

[0142] The first controller 3 is used to determine the target magnetic adjustment range corresponding to each motor 1 according to the overall vehicle operating conditions, and control the first magnetic adjustment component 2 to adjust the magnetic field strength of each motor 1 to the corresponding target magnetic adjustment range so that each motor 1 works in the high-efficiency area. The first controller 3 is also used to determine the heat generation power corresponding to each motor 1 according to each target magnetic adjustment range, and control the cooling power of the cooling component to match the sum of the heat generation power of multiple motors so that each motor 1 works at a suitable temperature.

[0143] In some embodiments, the first controller 3 may include a memory, a processor, and a control program for the electric drive system 10 stored in the memory and executable on the processor. When the processor executes the control program for the electric drive system 10, it implements a control method for the electric drive system 10. Referring to FIG10, the control method for the electric drive system 10 includes steps S11 to S17.

[0144] Step S11: Obtain the vehicle operating conditions.

[0145] Step S12: Determine the torque and speed of each motor based on the overall vehicle operating conditions.

[0146] Step S13: Determine the target magnetic adjustment range for each motor based on the torque and speed of each motor.

[0147] Step S14: Determine the target position of each magnetic adjustment component based on the target magnetic adjustment range corresponding to each motor.

[0148] Step S15: Control each actuator to drive the magnetic adjustment element to move to the corresponding target position.

[0149] Step S16: Determine the target valve opening based on the target location and the medium flow rate of the second flow path.

[0150] Step S17: Control the valve to achieve the target opening degree.

[0151] Steps S11 to S15 can be performed using PID cyclic control. That is, steps S11 to S15 can be executed cyclically according to the PID algorithm so that each motor 1 always works in the high-efficiency range that matches the current vehicle operating conditions, and the cooling power of the cooling components matches the current heat generation power of each motor.

[0152] It should be noted that in embodiments where the motor system includes multiple motors 1 and a first magnetic adjustment component 2, the control method executed by the first controller 3 is similar to the control method for a single motor 1 and a first magnetic adjustment component 2. The calibration process and control logic can be referred to the description of the control method for a single motor 1 and a first magnetic adjustment component 2 above, and will not be repeated here.

[0153] Referring to FIG12A, a vehicle 400 according to some embodiments of the present disclosure includes at least one of the above-described electric drive systems 10.

[0154] According to some embodiments of the present disclosure, the first controller 3 can determine the corresponding target magnetic field adjustment range based on the overall vehicle operating conditions, and control the first magnetic field adjustment component 2 to adjust the magnetic field strength of the motor 1 to the target magnetic field adjustment range, so that the motor 1 works in the high-efficiency region, reduces the energy consumption of the motor 1, and increases the vehicle's driving range.

[0155] According to some embodiments of the present disclosure, the electric drive system includes a motor and a first magnetic adjustment component. The first magnetic adjustment component is used to adjust the magnetic field strength of the motor. The control method of the electric drive system includes controlling the first magnetic adjustment component to adjust the magnetic field strength of the motor to a target magnetic adjustment range.

[0156] In some embodiments of this disclosure, the control method for the electric drive system further includes: determining a corresponding target magnetic adjustment range based on the overall vehicle operating conditions before controlling the first magnetic adjustment component.

[0157] In some embodiments of this disclosure, the electric drive system further includes a cooling component for regulating the temperature of the motor, and the control method of the electric drive system further includes determining the heat generation power of the motor according to the target magnetic adjustment range, so that the cooling power of the cooling component matches the heat generation power.

[0158] Referring to Figure 11, the control method of the electric drive system includes the following steps S101 to S103.

[0159] Step S101: Determine the corresponding target magnetic adjustment range based on the overall vehicle operating conditions.

[0160] Step S102: Control the first magnetic adjustment component to adjust the magnetic field strength of the motor to the target magnetic adjustment range.

[0161] Step S103: Determine the corresponding heat generation power of the motor according to the target magnetic adjustment range, so that the cooling power of the cooling component matches the heat generation power.

[0162] Steps S101 to S102 can be performed using PID cyclic control. That is, steps S101 to S102 can be executed cyclically according to the PID algorithm so that the motor always works in an efficient range that matches the current vehicle operating conditions, and the cooling power of the cooling components matches the current heat generation power of the motor.

[0163] Referring to FIG12B, a vehicle 100 according to some embodiments of the present disclosure includes a memory, a processor, and a control program for an electric drive system stored in the memory and executable on the processor. When the processor executes the control program for the electric drive system, it implements the control method for the electric drive system described above.

[0164] According to some embodiments of the present disclosure, the vehicle 100 can be controlled by the above-described electric drive system control method to adjust the magnetic field strength of the motor to the target magnetic field range, so that the motor works in the high-efficiency region, reduces the energy consumption of the motor, and increases the driving range of the vehicle.

[0165] It should be noted that the implementation of the control method of the electric drive system in some embodiments of this disclosure is similar to the implementation of the electric drive system described above. For details, please refer to the description of the electric drive system section, which will not be repeated here.

[0166] Electric drive systems in related technologies have some shortcomings. Due to the complex and variable operating conditions of motors, they cannot always operate in the high-efficiency range, which reduces the efficiency and performance of the electric drive system.

[0167] To address the aforementioned problems, some embodiments of this disclosure also provide an electric drive system 60.

[0168] An electric drive system 60 according to some embodiments of the present disclosure is described below with reference to Figures 13-22.

[0169] As shown in Figures 13 and 14, an electric drive system 60 according to some embodiments of the present disclosure includes a generator 61, a drive motor 62, a transmission mechanism, and a second magnetic flux adjustment component 14. The transmission mechanism is driveably connected to the generator 61 and the drive motor 62. The second magnetic flux adjustment component 14 is configured to adjust the magnetic flux of at least one of the generator 61 or the drive motor 62.

[0170] According to some embodiments of the electric drive system 60 disclosed herein, during vehicle operation, the generator 61 can recover energy under appropriate conditions, while the drive motor 62 can drive the vehicle as needed. Through the transmission mechanism, the power transmission path can be flexibly adjusted according to the actual working state and needs of the vehicle, achieving optimal energy utilization and power output.

[0171] The second magnetic flux adjustment component 14 is configured to adjust the magnetic flux of at least one of the generator 61 or the drive motor 62 to optimize the performance of at least one of the generator 61 or the drive motor 62. For example, at least one of the generator 61 and the drive motor 62 is provided with the second magnetic flux adjustment component 14. If only the generator 61 is provided with the second magnetic flux adjustment component 14, the second magnetic flux adjustment component 14 can change the performance parameters of the generator 61 by adjusting the magnetic flux of the generator 61. If only the drive motor 62 is provided with the second magnetic flux adjustment component 14, the second magnetic flux adjustment component 14 can change the performance parameters of the generator 61 by adjusting the magnetic flux of the drive motor 62. If both the generator 61 and the drive motor 62 are provided with the second magnetic flux adjustment component 14, the second magnetic flux adjustment components 14 of the generator 61 and the drive motor 62 will function separately to jointly optimize the performance of the electric drive system 60, reduce the energy consumption of the motor, and improve the efficiency and performance of the electric drive system 60.

[0172] Therefore, according to some embodiments of the present disclosure, the electric drive system 60 can reduce the energy consumption of the motor and improve the efficiency and performance of the electric drive system 60 by adjusting the magnetic flux of at least one of the generator 61 or the drive motor 62 to optimize the performance of at least one of the generator 61 or the drive motor 62.

[0173] According to some embodiments of this disclosure, both the generator 61 and the drive motor 62 are equipped with a second magnetic flux adjustment component 14, enabling the generator 61 and the drive motor 62 to independently adjust their magnetic flux, thereby achieving adjustment of their respective performance parameters. For example, the second magnetic flux adjustment component 14 on the generator 61 can flexibly adjust the magnetic flux of the generator 61 according to the power generation demand and the charging status of the battery system, optimizing power generation efficiency and achieving efficient energy recovery; the second magnetic flux adjustment component 14 on the drive motor 62 can adjust the magnetic flux of the drive motor 62 in real time according to factors such as the vehicle's driving status to provide optimal power output. By providing a second magnetic flux adjustment component 14 on both the generator 61 and the drive motor 62, independent optimization of the performance of the generator 61 and the drive motor 62 is achieved, providing the driver with a more comfortable and efficient driving experience.

[0174] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a cooling channel 151 and a first control valve 161 for adjusting the amount of medium in the cooling channel 151. The cooling channel 151 is configured to cool the generator 61 and the drive motor 62. When the generator 61 and the drive motor 62 are operating, the heat generated by their heating elements can be effectively absorbed and carried away by the medium in the cooling channel 151, ensuring that both the generator 61 and the drive motor 62 operate stably at a suitable temperature. By providing the first control valve 161, which is configured to adjust the amount of medium in the cooling channel 151, the cooling effect is adjusted.

[0175] According to some embodiments of this disclosure, as shown in Figures 13 and 14, both the generator 61 and the drive motor 62 are provided with cooling channels 151 for heat exchange with the heating elements. By providing cooling channels 151 on both the generator 61 and the drive motor 62, the heat generated by the heating elements during operation can be effectively absorbed and carried away by the medium in the cooling channels 151, thus maintaining both the generator 61 and the drive motor 62 at a suitable temperature for stable operation.

[0176] In some embodiments, the medium can be an oil capable of lubrication and heat exchange, which not only has excellent thermal conductivity, effectively absorbing and carrying away the heat generated by the heat-generating components of the generator 61 and drive motor 62, but also its lubricating properties can reduce the wear of internal parts of the generator 61 and drive motor 62, and extend the service life of the generator 61 and drive motor 62.

[0177] According to some embodiments of this disclosure, cooling channel 151 is configured to cool the housings of generator 61 and drive motor 62. By cooling the housings of generator 61 and drive motor 62, generator 61 and drive motor 62 will not deform or be damaged due to overheating during long-term operation or under high load, thereby maintaining the stability and integrity of their structure.

[0178] According to some embodiments of this disclosure, cooling channel 151 is configured to cool the heat-generating elements within the housings of generator 61 and drive motor 62. By cooling the heat-generating elements within the housings of generator 61 and drive motor 62, the internal components of the generator and drive motor are maintained at suitable temperatures, thereby preserving their optimal performance and reducing malfunctions and damage caused by overheating, which can lower maintenance costs.

[0179] According to some embodiments of this disclosure, the electric drive system 60 is configured such that, when the second magnetic adjustment assembly 14 is operating, the first control valve 161 is controlled to adjust the amount of medium in the cooling channel 151. The operation of the second magnetic adjustment assembly 14 can adjust the magnetic flux of at least one of the generator 61 or the drive motor 62, and the magnetic flux has a significant impact on the magnetic field distribution and overall performance of the motor. Therefore, by adjusting the magnetic flux of the motor, the performance of the motor can be optimized and its efficiency improved. With the increased efficiency of the motor, the heat generation is correspondingly reduced. By controlling the first control valve 161 to reduce the amount of medium in the cooling channel 151, the motor is adequately cooled while energy consumption is reduced.

[0180] According to some embodiments of this disclosure, the electric drive system 60 further includes a fourth flow path 152 connected to the cooling channel 151, and a first control valve 161 is configured to regulate the amount of medium in the fourth flow path 152. By providing the fourth flow path 152, the fourth flow path 152 can deliver medium to the cooling channel 151, meeting the cooling requirements of the cooling channel 151 for the generator 61 and the drive motor 62. The first control valve 161 can increase or decrease the amount of medium delivered from the fourth flow path 152 to the cooling channel 151 by regulating the amount of medium in the fourth flow path 152, thereby adjusting the cooling effect. For example, when the workload of the generator 61 and the drive motor 62 increases and the heat generated increases, the first control valve 161 will cause more medium to flow through the fourth flow path 152 to the cooling channel 151, thereby enhancing the cooling effect. Conversely, when the workload of the generator 61 and the drive motor 62 decreases and less heat is generated, the first control valve 161 will reduce the amount of medium flowing through the fourth flow path 152 to the cooling channel 151, achieving an energy-saving effect.

[0181] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system further includes a medium cooler 1521, which is connected to the fourth flow path 152 to cool the medium in the fourth flow path 152. Through the cooling effect of the medium cooler 1521, the temperature of the medium in the fourth flow path 152 can be effectively reduced, keeping the medium in the cooling channel 151 at a low temperature, thereby effectively cooling the generator 61 and the drive motor 62.

[0182] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes an engine 18 and a coupling mechanism 19. The engine 18 is connected to the coupling mechanism 19, which has a first state and a second state. In the first state, the engine 18 is connected to the axle via the coupling mechanism 19. In the second state, the engine 18 is decoupled from the axle. The engine 18 can convert other forms of energy into mechanical energy. By configuring the engine 18, its power output can be controlled by the coupling mechanism 19 to connect or disconnect it from the axle, allowing the electric drive system 60 to flexibly adjust its power output according to driving conditions and needs, thereby optimizing energy utilization and driving experience. The coupling mechanism 19 is used to realize the transmission connection between the engine 18 and the axle and has two operating modes: a first state and a second state. In the first state, the engine 18 is connected to the axle via the coupling mechanism 19, and the power of the engine 18 can be directly transmitted to the axle to drive the vehicle. In the second state, the engine 18 is decoupled from the axle, the power transmission between the engine 18 and the axle is disconnected, and the engine 18 no longer directly drives the vehicle, which can save fuel and reduce emissions.

[0183] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a fifth flow path 153 and a pressure regulating component 162. The fifth flow path 153 is connected to the coupling mechanism 19. The pressure regulating component 162 is configured to regulate the medium pressure of the fifth flow path 153. When the coupling mechanism 19 needs to establish a transmission connection with the engine 18, i.e., when entering the first state, the pressure regulating component 162 regulates the medium pressure of the fifth flow path 153, so that the fifth flow path 153 provides the necessary medium pressure to the coupling mechanism 19, realizing the transmission connection between the coupling mechanism 19 and the engine 18. The power of the engine 18 can be transmitted to the axle, thereby driving the vehicle. When it is necessary to disconnect the transmission connection between the engine 18 and the axle, i.e., when entering the second state, the fifth flow path 153 stops providing medium pressure to the coupling mechanism 19, so that the coupling mechanism 19 can be smoothly decoupled, thereby disconnecting the power transmission between the engine 18 and the axle. By regulating the medium pressure of the fifth flow path 153 through the pressure regulating component 162, the vehicle can flexibly adjust the power output mode under different driving conditions and needs, so as to achieve optimal driving performance and fuel economy.

[0184] For example, when high power output is required, the engine 18 can be connected to the axle, and the engine 18 and the drive motor 62 can work together to drive the vehicle to obtain greater driving force; when high power output is not required or in order to save fuel and reduce emissions, the connection between the engine 18 and the axle can be disconnected, and the vehicle can be driven by the drive motor 62. At this time, the engine 18 can cooperate with the generator 61 to supply power to the drive motor 62.

[0185] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a second control valve 163, which is connected to the pressure regulating assembly 162 to control the outlet pressure of the pressure regulating assembly 162. By controlling the outlet pressure of the pressure regulating assembly 162 through the second control valve 163, the medium pressure in the fifth flow path 153 can be flexibly adjusted, thereby controlling the transmission connection state between the coupling mechanism 19 and the engine 18.

[0186] For example, when it is necessary to adjust the power transmission state between the engine 18 and the axle, the second control valve 163 can change the outlet pressure of the pressure regulating component 162 to affect the medium pressure provided by the fifth flow path 153 to the coupling mechanism 19, so as to switch the connection state between the engine 18 and the axle according to different driving conditions and needs.

[0187] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a second pump 181 connected to a media storage pool. The second pump 181 is connected to a fourth flow path 152 and a fifth flow path 153, respectively. By providing the second pump 181, the second pump 181 can provide power to the flow path system, causing the media to flow in the flow path system. The media storage pool is used to store the media, and the second pump 181 can draw media from the media storage pool by being connected to the media storage pool. The second pump 181 is connected to the fourth flow path 152 and the fifth flow path 153, respectively, so that the second pump 181 can drive the media to flow in the fourth flow path 152 and the fifth flow path 153. Driven by the second pump 181, the medium can flow into the fifth flow path 153 to provide the necessary medium pressure for the coupling mechanism 19, so as to realize the transmission connection between the coupling mechanism 19 and the engine 18; the medium can also flow into the fourth flow path 152 for heat exchange with the heating elements to reduce the temperature. The heating elements include, but are not limited to, the generator 61 and the drive motor 62, so that the generator 61 and the drive motor 62 can maintain normal operation.

[0188] Therefore, the second pump 181 draws media from the media storage pool and delivers it to the coupling mechanism 19 and the cooling channel 151 through the fourth flow path 152 and the fifth flow path 153, respectively, to complete the functions of transmission and cooling. For example, the second pump 181 is mainly used to deliver media to the fifth flow path 153 to realize the transmission connection between the coupling mechanism 19 and the engine 18, while the excess media in the second pump 181 is delivered to the fourth flow path 152 to provide the necessary media for the cooling channel 151 to achieve the cooling of the heat-generating elements.

[0189] For example, the second pump 181 can be an electronic pump or a mechanical pump.

[0190] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the outlet of the first control valve 161 is connected to the inlet of the second pump 181. The inlet of the second pump 181 is the entrance for the second pump 181 to draw media from the media storage pool. The media output by the second pump 181 flows through the first control valve 161 to the fourth flow path 152, thereby controlling the amount of media in the fourth flow path 152. By connecting the outlet of the first control valve 161 to the inlet of the second pump 181, when the amount of media required by the cooling channel 151 is less than the amount of media flowing into the first control valve 161, part of the media in the first control valve 161 flows to the fourth flow path 152, and the excess media flows back to the inlet of the second pump 181 through the outlet of the first control valve 161. This effectively balances the media flow rate in the flow path system, realizes media recycling, reduces power consumption, and improves media utilization efficiency.

[0191] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a third pump 182 connected to a media storage pool and a fourth flow path 152. By providing the third pump 182, the third pump 182 can draw media from the media storage pool and supply media to the fourth flow path 152. When the engine 18 is operating, the third pump 182 can independently draw media from the media storage pool and cool and lubricate the engine 18 through the fourth flow path 152, achieving normal operation and efficient cooling of the engine 18.

[0192] In addition, the operating status of the third pump 182 can be adjusted in real time according to the operating status of the engine 18. By controlling the third pump 182, the supply volume and supply pressure of the medium can be precisely adjusted to meet the cooling and lubrication needs of the engine 18 under different operating conditions.

[0193] Furthermore, since the media demand of the fourth flow path 152 varies with the operating state of the electric drive system 60, when the amount of media delivered by the second pump 181 to the fourth flow path 152 is insufficient to meet the cooling demand, the media in the media storage pool can be extracted and delivered to the fourth flow path 152 by the drive of the third pump 182 to replenish the media required by the fourth flow path 152, so that the heat-generating elements can be adequately cooled and the normal operation of the electric drive system 60 can be maintained.

[0194] According to some embodiments of this disclosure, as shown in Figures 4, 13, 14, and 19, the second magnetic adjustment assembly 14 includes a movable magnetic adjustment element 21 and a magnetic adjustment motor 143 for driving the magnetic adjustment element 21 to move. By changing the position of the magnetic adjustment element 21, the magnetic flux of the generator 61 or the drive motor 62 can be adjusted, thereby changing the performance parameters of the generator 61 or the drive motor 62 and improving the efficiency and performance of the electric drive system 60.

[0195] Thus, by setting up a magneto-adjusting motor 143, which generates power to move the magneto-adjusting element 21, the magneto-adjusting motor 143 can receive instructions from the vehicle's control unit and operate under the control of the control unit, thereby adjusting the magnetic flux of at least one of the generator 61 or the drive motor 62.

[0196] For example, when it is necessary to adjust the magnetic flux of generator 61 or drive motor 62, the control unit sends the adjustment command to the corresponding magneto-adjusting motor 143. After receiving the command, magneto-adjusting motor 143 drives magneto-adjusting component 21 to move, so as to adjust the magnetic flux of generator 61 or drive motor 62.

[0197] According to some embodiments of this disclosure, as shown in Figures 4 to 7 and Figures 19 to 21, the magnetic adjustment element 21 is movably disposed on at least one of the following: the stator and / or rotor of the generator 61 and / or drive motor 62. The magnetic adjustment element 21 can be disposed on the stator or on the rotor. On one hand, when the magnetic adjustment element 21 is disposed on the stator, by controlling the movement of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the stator can be changed, thereby changing the magnetic field distribution and realizing the adjustment of magnetic flux. On the other hand, when the magnetic adjustment element 21 is disposed on the rotor, by adjusting the position of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the rotor can be changed, thereby adjusting the magnetic flux.

[0198] According to some embodiments of this disclosure, as shown in Figures 2 and 3, a magnetic flux adjusting element 21 is movably disposed on the stator yoke 171 of at least one of the stators of the generator 61 or the drive motor 62. The magnetic flux adjusting motor 143 can drive the magnetic flux adjusting element 21 to move, thereby adjusting the magnetic flux passing through the stator teeth 172 of the stator. When current passes through the stator windings, a magnetic field is generated around the stator teeth 172. When the magnetic flux adjusting element 21 moves on the stator yoke 171, the magnetic flux passing through the stator teeth 172 can be directly adjusted. By moving the magnetic flux adjusting element 21, as the radially facing area between the magnetic flux adjusting element 21 and the stator teeth 172 changes, continuous or segmented adjustment of the magnetic flux can be achieved, thereby increasing the range of magnetic flux adjustment and improving the accuracy of magnetic flux adjustment. For example, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 increases, the magnetic flux path widens, the magnetic resistance decreases accordingly, and the magnetic flux increases; conversely, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 decreases, the magnetic flux path narrows, the magnetic resistance increases accordingly, and the magnetic flux decreases.

[0199] According to some embodiments of this disclosure, as shown in Figures 20 and 21, there are multiple magnetic adjustment elements 21. At least some of the magnetic adjustment elements 21 can adjust the magnetic flux through the stator teeth 172 when they move. It is understood that multiple magnetic adjustment elements 21 can be adjusted in position as a whole, thereby simultaneously adjusting the magnetic flux through multiple stator teeth 172 to achieve uniform magnetic field adjustment. A portion of the multiple magnetic adjustment elements 21 can also be adjusted in position as a whole, allowing for local adjustment of the magnetic flux through a specific stator tooth 172. This enables precise and wide-range adjustment of the magnetic flux through the stator teeth 172, thereby optimizing motor performance and ensuring that the motor maintains excellent performance under different operating conditions.

[0200] According to some embodiments of this disclosure, as shown in Figures 5-7, the magnetic adjustment element 21 is movably disposed inside the rotor of at least one of the generators 61 or drive motors 62, on one radial side of the rotor, or at least one axial end of the rotor. The placement of the magnetic adjustment element 21 is similar to that described above and will not be repeated here.

[0201] When the motor is running, the permanent magnet magnetic field generated by the permanent magnets on the rotor flows to the stator 17, and the effective magnetic field is called the "main magnetic field". Since the total magnetic flux of the permanent magnet magnetic field generated by the permanent magnets on the rotor is constant, a short-circuit loop is formed between the magnetic adjustment component 21 and the rotor, so that the total magnetic flux of the permanent magnet magnetic field can flow to the main magnetic field and the short-circuit loop respectively. The magnetic flux through the rotor is adjusted by the second magnetic adjustment component 14 to adjust the magnetic flux of the short-circuit loop, thereby adjusting the magnetic flux of the main magnetic field. The adjustment is convenient, thus enabling the motor to have the advantages of both constant torque and constant power regions. While ensuring high torque density and power density, it effectively widens the constant power operation region and the high efficiency region. In addition, the magnetic adjustment component 21 is movably set on one radial side of the rotor, which facilitates the formation of a short-circuit loop between the magnetic adjustment component 21 and the rotor, ensuring the magnetic adjustment effect of the second magnetic adjustment component 14.

[0202] The magnet-adjusting motor 143 is connected to the magnet-adjusting component 21 for adjusting the overlap area between the magnet-adjusting component 21 and the rotor in the axial direction.

[0203] Therefore, during motor operation, the effective magnetic field generated by the permanent magnets on the rotor flowing to the stator 17 is called the "main magnetic field". Since the total magnetic flux of the permanent magnets generated by the permanent magnets on the rotor is constant, a short-circuit loop is formed between the magnetic adjustment element 21 and the rotor, so that the total magnetic flux of the permanent magnets can flow to the main magnetic field and the short-circuit loop respectively. The magnetic adjustment element 21 is driven to move axially by the magnetic adjustment motor 143, thereby adjusting the size of the overlap area between the magnetic adjustment element 21 and the rotor in the axial direction to change the magnetic flux of the short-circuit loop, and thus adjusting the magnetic flux of the main magnetic field. This allows the motor to have the advantages of both constant torque and constant power regions, and effectively expands the constant power operation region and high efficiency region while ensuring high torque density and power density.

[0204] Furthermore, since the magnetic flux of the main magnetic flux in some embodiments of this disclosure is adjusted by changing the overlap area between the magnetic adjustment component 21 and the rotor along the axial direction, a wider magnetic adjustment range of the second magnetic adjustment component 14 is achieved. Additionally, when the motor is under heavy load, the magnetic flux of the main magnetic field is increased by the second magnetic adjustment component 14, thereby increasing the permanent magnet flux linkage and torque output. Furthermore, by improving the high-efficiency region of the motor, a high degree of matching is achieved between the high-efficiency region of the motor and the operating point of the new energy vehicle, thereby reducing the power consumption of the new energy vehicle and improving its economy.

[0205] According to some embodiments of the present disclosure, as shown in FIG6, the magnetic adjustment element 21 is adapted to be movably disposed at at least one end of the rotor in the axial direction to adjust the magnetic flux through the rotor. The magnetic adjustment motor 143 is connected to the magnetic adjustment element 21 and is used to drive the magnetic adjustment element 21 closer to or away from the rotor.

[0206] Understandably, when the motor is running, the permanent magnet magnetic field generated by the permanent magnets on the rotor flows to the stator 17, and the effective magnetic field is called the "main magnetic field". Since the total magnetic flux of the permanent magnet magnetic field generated by the permanent magnets on the rotor is constant, a short-circuit loop is formed between the magnetic adjustment element 21 and the rotor, so that the total magnetic flux of the permanent magnet magnetic field can flow to the main magnetic field and the short-circuit loop respectively. The magnetic adjustment element 21 is driven by the magnetic adjustment motor 143 to move closer to or away from the rotor, thereby adjusting the magnetic flux through the rotor to adjust the magnetic flux of the short-circuit loop, and thus adjust the magnetic flux of the main magnetic field. The adjustment is convenient, and the motor can achieve the advantages of both constant torque and constant power regions. While ensuring high torque density and power density, it effectively expands the constant power operation region and the high efficiency region.

[0207] Furthermore, by adjusting the magnetic flux through the rotor by changing the second magnetic adjustment component 14, the magnetic adjustment requirements of the motor can be met, avoiding the problem of overcoming a large axial force due to axial movement of the rotor or stator in related technologies, making magnetic adjustment more convenient.

[0208] When the motor is under heavy load, the magnetic flux of the main magnetic field is increased by the second magnetic adjustment component 14, thereby increasing the permanent magnet flux linkage and increasing torque output. In addition, by improving the high-efficiency region of the motor, a high degree of matching between the high-efficiency region of the motor and the operating point of the new energy vehicle is achieved, thereby reducing the power consumption of the new energy vehicle and improving its economy.

[0209] The magnetic adjustment component 21 is movably disposed at at least one end of the rotor's axial direction. It is understood that a second magnetic adjustment component 14 is provided at both ends of the rotor's axial direction. This arrangement creates two short-circuit loops for the magnetic flux, thereby improving the ability to adjust the magnetic flux of the main magnetic flux and eliminating axial unbalanced magnetic pull, further improving the reliability of the motor. Alternatively, as shown in Figure 6, a second magnetic adjustment component 14 is provided at one end of the rotor's axial direction. This arrangement reduces costs while achieving magnetic flux adjustment of the main magnetic flux.

[0210] For example, in the low-speed region, the magnet-adjusting motor 143 drives the magnet-adjusting component 21 to move away from the rotor, thereby reducing the flux in the short-circuit loop and increasing the flux of the main flux. This, in turn, increases the no-load back EMF, thus improving torque and power performance in the low-speed region. In the high-speed region, the magnet-adjusting motor 143 drives the magnet-adjusting component 21 to move closer to the rotor, thereby increasing the flux in the short-circuit loop and reducing the flux of the main flux. This, in turn, reduces the no-load back EMF, thereby reducing rotor and stator 17 losses, widening the constant power region, increasing peak torque / power in the high-speed region, achieving a wider operating range and better energy efficiency. It also effectively prevents overvoltage damage to power devices in inverters using this motor, adding a layer of protection to the electric drive system. Thus, the second magnet-adjusting component 14 enables real-time adjustment of the main flux, thereby achieving real-time control of the motor's no-load back EMF and voltage.

[0211] In addition, the motor is connected to the second controller. When the motor is in the medium-high speed range, the magnetic flux of the main magnetic flux is adjusted by the second magnetic adjustment component 14. This reduces the need to adjust the magnetic flux of the main magnetic flux through the armature direct shaft weakening magnetic current of the second controller, thereby reducing the risk of irreversible demagnetization of the permanent magnet and improving the reliability of the motor.

[0212] According to some embodiments of this disclosure, as shown in FIG7, the magnetic adjustment component 21 includes an axial stator 146, and the magnetic adjustment motor 143 can drive the magnetic adjustment component 142 to move to adjust the relative position of the rotor and the axial stator 146, so as to achieve effective adjustment of the working magnetic field of the motor.

[0213] For example, the axial stator 146 includes an axial stator core and an axial stator winding. The axial stator core includes an axial stator yoke and an axial stator tooth, which are fixedly connected. The axial stator winding is wound around the axial stator tooth. By setting the axial stator yoke and axial stator tooth, the fixing function and the winding function of the axial stator core are separated and do not interfere with each other, making the structure of the axial stator core more reasonable.

[0214] In some embodiments, the axial stator core may be formed by winding steel sheets, thereby reducing iron loss and further improving motor efficiency.

[0215] According to some embodiments of this disclosure, the magnetic adjustment element 21 satisfies at least one of the following: the magnetic adjustment element 21 disposed in the generator 61 can move along its axial direction, or the magnetic adjustment element 21 disposed in the drive motor 62 can move along its axial direction; the magnetic adjustment element 21 disposed in the generator 61 can move along its circumferential direction, or the magnetic adjustment element 21 disposed in the drive motor 62 can move along its circumferential direction; or the magnetic adjustment element 21 disposed in the generator 61 can move along its radial direction, or the magnetic adjustment element 21 disposed in the drive motor 62 can move along its radial direction.

[0216] The magnetic adjustment component 21 has multiple movement modes.

[0217] For example, the adjusting element 21 can move circumferentially around the generator 61 or drive motor 62, that is, around the rotation axis of the generator 61 or drive motor 62, moving in a circular direction on a horizontal plane. The adjusting element 21 can also move radially around the generator 61 or drive motor 62, that is, starting from the rotation axis of the generator 61 or drive motor 62, moving inward or outward in a radial direction.

[0218] The movement of the magnetic adjustment component 21 can also include a combination of circumferential and radial movement, that is, it can move in both the circumferential and radial directions on the horizontal plane.

[0219] In addition, the magnetic adjustment component 21 can also move along the axial direction of the generator 61 or the drive motor 62, that is, along the rotation axis of the generator 61 or the drive motor 62.

[0220] In some embodiments, the movement of the magnetic adjustment element 21 can be more complex. For example, it can move axially while simultaneously performing a compound movement in the circumferential and radial directions, forming a spiral upward or downward movement path.

[0221] According to some embodiments of this disclosure, an electric drive system includes a drive motor 62, a second magnetic flux adjustment component 14, and a second controller. The second magnetic flux adjustment component 14 is used to adjust the magnetic flux of the drive motor 62; the second controller is used to control the second magnetic flux adjustment component 14 to move to a target position. By adjusting the magnetic flux of the drive motor 62, the performance parameters of the drive motor 62 can be optimized, thereby reducing the energy consumption of the drive motor 62 and improving the efficiency and performance of the electric drive system 60. The movement of the second magnetic flux adjustment component 14 can adjust the magnetic flux of the drive motor 62. According to the magnetic flux adjustment needs, the second controller can control the second magnetic flux adjustment component 14 to move to the target position to precisely adjust the magnitude of the magnetic flux, making the electric drive system 60 more adaptable to changing working conditions and driving requirements.

[0222] According to some embodiments of this disclosure, the electric drive system 60 further includes a cooling channel 151 and a first control valve 161 for adjusting the amount of medium in the cooling channel 151, the cooling channel 151 being used to cool the drive motor 62. By adjusting the amount of medium in the cooling channel 151 through the first control valve 161, the amount of medium in the cooling channel 151 can be increased or decreased according to the heat generated by the drive motor 62, achieving efficient and reasonable heat dissipation management. For example, when the workload of the drive motor 62 increases and the heat generated increases, the first control valve 161 will cause more medium to flow to the cooling channel 151, thereby enhancing the cooling effect. Conversely, when the workload of the drive motor 62 decreases and less heat is generated, the first control valve 161 will reduce the amount of medium flowing to the cooling channel 151, achieving energy-saving effects.

[0223] According to some embodiments of this disclosure, the electric drive system 60 is configured to control the first control valve 161 to adjust the amount of medium in the cooling channel 151 when the second magnetic adjustment component 14 is operating. The operation of the second magnetic adjustment component 14 can adjust the magnetic flux of the drive motor 62, which has a significant impact on the magnetic field distribution and overall performance of the drive motor 62. Therefore, by adjusting the magnetic flux of the drive motor 62, the performance of the drive motor 62 can be optimized and its efficiency improved. With the increased efficiency of the drive motor 62, heat generation is correspondingly reduced. By controlling the first control valve 161 to reduce the amount of medium in the cooling channel 151, the drive motor 62 is adequately cooled while reducing energy consumption.

[0224] According to some embodiments of this disclosure, as shown in Figures 13 and 14, the electric drive system 60 further includes a fourth flow path 152 connected to the cooling channel 151, and a first control valve 161 is used to regulate the amount of medium in the fourth flow path 152. By providing the fourth flow path 152, the fourth flow path 152 can deliver medium to the cooling channel 151, meeting the cooling requirements of the cooling channel 151 for the drive motor 62. The first control valve 161 can increase or decrease the amount of medium delivered from the fourth flow path 152 to the cooling channel 151 by regulating the amount of medium in the fourth flow path 152, thereby adjusting the cooling effect. For example, when the workload of the drive motor 62 increases and the heat generated increases, the first control valve 161 will cause more medium to flow through the fourth flow path 152 to the cooling channel 151, thereby enhancing the cooling effect. Conversely, when the workload of the drive motor 62 decreases and less heat is generated, the first control valve 161 will reduce the amount of medium flowing through the fourth flow path 152 to the cooling channel 151, achieving an energy-saving effect.

[0225] According to some embodiments of this disclosure, the electric drive system 60 further includes a second pump 181 connected to a media storage pool and connected to a fourth flow path 152. By providing the second pump 181, the second pump 181 can power the flow path system, causing the media to flow within the system. The media storage pool is used to store the media, and the second pump 181, connected to the media storage pool, can draw media from the media storage pool. The second pump 181's connection to the fourth flow path 152 allows it to drive the media to flow within the fourth flow path 152. Driven by the second pump 181, the media can flow into the fourth flow path 152 to cool the drive motor 62, ensuring its normal operation.

[0226] According to some embodiments of this disclosure, the second controller is further configured to determine the heat generation power corresponding to the drive motor 62 based on the target position, so that the cooling power of the cooling channel 151 matches the heat generation power. Changing the position of the second magnetic adjustment component 14 can increase or decrease the magnetic flux of the drive motor 62, thus changing the heat generation of the drive motor 62 accordingly. The second controller can adjust the amount of medium in the cooling channel 151 to adapt to changes in heat generation, improving energy efficiency. Through the dynamic adjustment of cooling power by the second controller based on the target position, the drive motor 62 can maintain a stable temperature under various operating conditions, thereby optimizing its performance and lifespan.

[0227] According to some embodiments of this disclosure, the second controller is also used to determine the corresponding target position based on the overall vehicle operating conditions. Under different overall vehicle operating conditions, the operating parameters of the drive motor 62, such as load, speed, and torque, will vary. The second controller can determine the target position of the second magnetic adjustment component 14 based on the current overall vehicle operating conditions, and by controlling the second magnetic adjustment component 14 to move to the target position, effectively adjust the working magnetic field of the motor, thereby optimizing performance and reducing energy consumption.

[0228] According to some embodiments of this disclosure, the second magnetic flux adjustment assembly 14 includes a movable magnetic flux adjustment element 21 and a magnetic flux adjustment motor 143 for driving the magnetic flux adjustment element 21 to move. By changing the position of the magnetic flux adjustment element 21, the magnetic flux of the drive motor 62 can be adjusted, thereby changing the performance parameters of the drive motor 62 and improving the efficiency and performance of the electric drive system 60. By providing the magnetic flux adjustment motor 143, which generates the power to move the magnetic flux adjustment element 21, the magnetic flux adjustment motor 143 can receive instructions from the vehicle's control unit and operate under the control of the control unit to adjust the magnetic flux of the drive motor 62.

[0229] For example, when it is necessary to adjust the magnetic flux of the drive motor 62, the control unit sends the adjustment command to the corresponding magnet adjustment motor 143. After receiving the command, the magnet adjustment motor 143 will drive the magnet adjustment component 21 to move, so as to adjust the magnetic flux of the drive motor 62.

[0230] According to some embodiments of this disclosure, as shown in Figures 4 to 7 and Figures 19 to 21, the magnetic adjustment element 21 is movably disposed on the stator and / or rotor of the drive motor 62. The magnetic adjustment element 21 can be disposed on the stator or on the rotor. When the magnetic adjustment element 21 is disposed on the stator, by controlling the movement of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the stator can be changed, thereby changing the magnetic field distribution and adjusting the magnetic flux. On the other hand, when the magnetic adjustment element 21 is disposed on the rotor, by adjusting the position of the magnetic adjustment element 21, the position of the magnetic adjustment element 21 relative to the rotor can be changed, thereby adjusting the magnetic flux.

[0231] According to some embodiments of this disclosure, as shown in Figures 2 and 3, a magnetic adjustment element 21 is movably disposed on the stator yoke 171 of the stator. A magnetic adjustment motor 143 can drive the magnetic adjustment element 21 to move, thereby adjusting the magnetic flux passing through the stator teeth 172 of the stator. When current flows through the stator windings, a magnetic field is generated around the stator teeth 172. As the magnetic adjustment element 21 moves on the stator yoke 171, the magnetic flux passing through the stator teeth 172 can be directly adjusted. By moving the magnetic adjustment element 21, as the radially facing area between the magnetic adjustment element 21 and the stator teeth 172 changes, continuous or segmented adjustment of the magnetic flux can be achieved, increasing the range of magnetic adjustment and improving the accuracy of magnetic adjustment.

[0232] For example, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 increases, the magnetic flux path widens, the magnetic resistance decreases accordingly, and the magnetic flux increases; conversely, when the area of ​​the magnetic adjustment element 21 facing the stator tooth 172 decreases, the magnetic flux path narrows, the magnetic resistance increases accordingly, and the magnetic flux decreases.

[0233] According to some embodiments of this disclosure, as shown in Figures 5-7, the adjusting element 21 is movably disposed inside the rotor of the drive motor 62, on one radial side of the rotor, or at least one axial end of the rotor. The adjusting element 21 has various disposed positions.

[0234] For example, the magnetic adjustment element 21 can be disposed inside the rotor without occupying additional space. The magnetic adjustment element 21 can also be disposed on the radial side of the rotor, that is, along the radial direction of the rotor, on the outer or inner edge of the rotor. The magnetic adjustment element 21 can also be disposed at at least one end of the rotor's axial direction, that is, the magnetic adjustment element 21 can be disposed at the upper axial end, the lower axial end, or both the upper and lower axial ends of the rotor.

[0235] According to some embodiments of this disclosure, the magnetic adjustment component 21 can move relative to the drive motor 62 in at least one of its axial direction, circumferential direction and radial direction to adjust the relative position of the magnetic adjustment component 21 and the drive motor 62, thereby adjusting the magnetic flux of the stator and / or the magnetic flux of the rotor of the motor 1, thereby changing the magnetic field strength of the drive motor 62, adjusting the magnetic field strength of the drive motor 62 to the target magnetic adjustment range, and reducing the energy consumption of the drive motor 62.

[0236] In some embodiments of this disclosure, the structure of the stator yoke 171 is similar to that described above, and will not be repeated here.

[0237] According to some embodiments of this disclosure, as shown in Figures 4 and 19, the second magnetic adjustment assembly 14 further includes a drive ring 144. The drive ring 144 is located at the end of the rotor core along the axial direction of the stator core 63 and cooperates with the magnetic adjustment motor 143. The drive ring 144 is connected to multiple magnetic adjustment elements 21 to drive the multiple magnetic adjustment elements 21 to move circumferentially. By setting the drive ring 144, cooperating with the magnetic adjustment motor 143 and connected to the multiple magnetic adjustment elements 21, under the drive of the magnetic adjustment motor 143, the drive ring 144 can drive the multiple magnetic adjustment elements 21 to move circumferentially, thereby realizing the movement of the magnetic adjustment elements 21 to achieve magnetic flux adjustment of the drive motor 62 or generator 61. The circumferential movement of the magnetic adjustment elements 21 makes the magnetic field distribution more uniform and the magnetic flux adjustment more precise.

[0238] Furthermore, the structure is more compact because the circumferential movement occupies minimal external space. By placing the drive ring 144 at the end of the rotor core, the spatial layout of the second magnetic adjustment assembly 14 can be optimized, reducing the space occupied by the drive ring 144 in the motor housing, thus enabling the motor housing to effectively fix and protect the stator core 63.

[0239] In addition, the magnetizing motor 143 can control the rotation direction of the drive ring 144 by rotating forward or backward, thereby controlling the circumferential movement direction of the magnetizing component 21, so that the magnetic flux can be increased or decreased accordingly to adapt to different working scenarios and needs.

[0240] According to some embodiments of this disclosure, as shown in Figures 20 and 21, the second magnetic adjustment assembly 14 further includes a balance ring 145. Along the axial direction of the stator core 63, the balance ring 145 and the drive ring 144 are distributed on both sides of the stator core 63. The balance ring 145 is connected to the ends of the plurality of magnetic adjustment elements 21. By setting the balance ring 145, the second magnetic adjustment assembly 14 achieves a more balanced layout in structure. The balance ring 145 is located on the other side of the stator core 63, corresponding to the drive ring 144, and together they act on the plurality of magnetic adjustment elements 21, making the movement of the magnetic adjustment elements 21 more stable during circumferential movement, and enabling the plurality of magnetic adjustment elements 21 to move synchronously in the circumferential direction, thus making the magnetic field adjustment more precise and achieving uniformity and consistency in the magnetic field distribution.

[0241] According to some embodiments of this disclosure, as shown in Figures 2 and 3, the second magnetic adjustment assembly 14 includes a first state and a second state. In the first state, the magnetic adjustment motor 143 drives the magnetic adjustment element 21 to move so that the magnetic adjustment element 21 is directly opposite to the stator teeth 172. In the second state, the magnetic adjustment motor 143 drives the magnetic adjustment element 21 to move so that the magnetic adjustment element 21 is misaligned with the stator teeth 172. The second magnetic adjustment assembly 14 can switch between the first state and the second state to adjust the magnetic flux of the drive motor 62. In the first state, the magnetic adjustment element 21 is directly opposite to the stator teeth 172. At this time, the gap between the magnetic adjustment element 21 and the stator teeth 172 is minimal, the magnetic flux path is at its widest, and the magnetic reluctance is relatively low, thereby allowing a larger magnetic field to pass through the magnetic circuit. When it is necessary to adjust the magnetic flux of the drive motor 62, the second magnetic adjustment assembly 14 enters the second state.

[0242] In the second state, the magnet-adjusting motor 143 drives the magnet-adjusting component 21 to move, causing misalignment between the magnet-adjusting component 21 and the stator teeth 172. This narrows the magnetic flux path, increases magnetic resistance, and correspondingly reduces the magnetic flux. By adjusting the oil pressure, the degree of misalignment between the magnet-adjusting component 21 and the stator teeth 172 can be controlled, thereby achieving continuous adjustment of the magnetic flux of the drive motor 62. In the second state, the drive motor 62 can adjust the magnetic flux according to working requirements, achieving more flexible and efficient performance control. The second magnet-adjusting component 14 effectively adjusts the permanent magnet magnetic field, thereby enabling real-time control of the no-load back EMF of the drive motor 62, which helps the drive motor 62 achieve optimal performance in different speed ranges. In the low-speed range, increasing the no-load back EMF increases the torque performance and power, making the vehicle more powerful at low speeds. In the high-speed range, reducing the no-load back EMF reduces core losses, widens the constant power range, increases peak torque and power, and also helps prevent inverter damage due to overvoltage.

[0243] According to some embodiments of this disclosure, as shown in FIG4, the second magnetic adjustment assembly 14 includes an axial stator 146 and an actuating component 147, the actuating component 147 being used to drive the axial stator 146 to rotate circumferentially about the rotor and / or move radially in the rotor.

[0244] In some embodiments, the axial stator 146 is operated in a circumferential manner. When the axial stator 146 rotates circumferentially, the circumferential position of the axial stator 146 changes, thereby realizing the phase adjustment between the axial stator 146 and the rotor magnetic poles, and realizing the effective adjustment of the working magnetic field of the motor.

[0245] It is understandable that "rotation of the axial stator 146 around the circumference" refers to the rotation of the axial stator 146 around the axis of the axial stator 146. The axial stator 146 is arranged coaxially with the rotor. Therefore, "rotation of the axial stator 146 around the circumference" also refers to the rotation of the axial stator 146 around the axis of the rotor.

[0246] In other embodiments, the axial stator 146 is actuated radially. When the axial stator 146 moves radially in the rotor, the radial position of the axial stator 146 changes, thereby realizing the phase adjustment between the axial stator 146 and the rotor magnetic poles, and realizing the effective adjustment of the working magnetic field of the motor.

[0247] In some other embodiments, the axial stator 146 is operated by a combination of circumferential and radial motion. The circumferential and radial positions of the axial stator 146 are changed, thereby realizing the phase adjustment between the axial stator 146 and the rotor magnetic poles, and achieving effective adjustment of the working magnetic field of the motor.

[0248] In some embodiments of this disclosure, referring to Figures 7 and 22, the second magnetic adjustment assembly 14 further includes a magnetic adjustment wheel 148. The axial stator 146 is fixedly connected to the magnetic adjustment wheel 148. The actuating component 147 drives the magnetic adjustment wheel 148 to rotate circumferentially, thereby causing the axial stator 146 to rotate circumferentially. In this way, the actuating component 147 does not need to directly drive the axial stator 146 to rotate, but indirectly drives it through the magnetic adjustment wheel 148. This allows for a more reasonable arrangement of the relative positions of the actuating component 147 and the magnetic adjustment wheel 148, preventing them from being too close together and giving the motor greater design freedom. Furthermore, as a transmission component, the magnetic adjustment wheel 148 is relatively easy to replace after damage. And generally speaking, the cost of the magnetic adjustment wheel 148 is lower than that of the axial stator 146, so replacing a damaged magnetic adjustment wheel 148 helps save costs.

[0249] The following describes a vehicle 400 having the electric drive system 60 described above, according to some embodiments of the present disclosure.

[0250] Referring to FIG23, a vehicle 400 according to some embodiments of the present disclosure includes at least one of the above-described electric drive systems 60. Since the vehicle according to some embodiments of the present disclosure includes the above-described electric drive system 60, the vehicle according to some embodiments of the present disclosure can achieve flux regulation of at least one generator 61 and / or drive motor 62, optimize the performance of the electric drive system 60, and improve the overall efficiency and performance of the vehicle 400.

[0251] According to some embodiments of the present disclosure, the vehicle control method is shown in FIG15. The vehicle 400 includes the electric drive system 60 described above. The drive motor 62 is provided with a second magnetic adjustment component 14. The control method includes: collecting the torque and speed values ​​of the drive motor 62, and determining whether the drive motor 62 needs magnetic adjustment based on the collection results; when the drive motor 62 needs magnetic adjustment, the second magnetic adjustment component 14 operates to change the magnetic flux of the drive motor 62.

[0252] The drive motor 62 is equipped with a second magnetic flux adjustment component 14, which allows the drive motor 62 to adjust its magnetic flux according to different operating conditions and requirements to optimize its performance. The control method determines whether magnetic flux adjustment is needed based on the operating status of the drive motor 62 and performs corresponding control when necessary. By collecting the torque and speed values ​​of the drive motor 62, its operating state and performance can be determined. Based on the collected torque and speed values, the vehicle system performs a series of calculations and comparisons using a preset algorithm or model to determine whether magnetic flux adjustment is required for the current operating state of the drive motor 62. If the vehicle system determines that magnetic flux adjustment is needed, the vehicle control unit controls the operation of the second magnetic flux adjustment component 14 to change the magnetic flux of the drive motor 62, thereby optimizing its performance, such as improving efficiency, reducing energy consumption, or increasing power output.

[0253] According to some embodiments of this disclosure, the drive motor 62 is provided with a cooling channel 151. The control method further includes: when the second magnetic adjustment component 14 is running, adjusting the amount of medium in the cooling channel 151 of the drive motor. The position of the magnetic adjustment element 21 can be controlled by the operation of the magnetic adjustment motor 143. After the magnetic adjustment motor 143 is running, the position of the magnetic adjustment element 21 changes, which can increase or decrease the magnetic flux of the drive motor 62. Therefore, the heat generation of the drive motor 62 will also change accordingly. By adjusting the amount of medium in the cooling channel 151, the change in heat generation can be adapted to improve energy efficiency.

[0254] According to some embodiments of this disclosure, the second magnetic adjustment assembly 14 includes a movable magnetic adjustment element 21 and a magnetic adjustment motor 143 for driving the magnetic adjustment element 21 to move. When the magnetic adjustment motor 143 controls the magnetic adjustment element 21 to move to a set position, it adjusts the amount of medium in the cooling channel 151. By controlling the position of the magnetic adjustment element 21 in the drive motor 62, the magnetic adjustment motor 143 can optimize the performance of the drive motor 62. As the magnetic adjustment motor 143 operates, the magnetic adjustment element 21 moves to the set position, optimizing the magnetic field distribution of the drive motor 62, increasing the magnetic flux of the drive motor 62, thereby improving the performance and efficiency of the drive motor 62. The efficiency of the drive motor 62 is improved, and therefore the heat generation is correspondingly reduced. By reducing the amount of medium in the cooling channel 151, energy consumption is reduced, and operating costs are lowered.

[0255] According to some embodiments of this disclosure, when the position of the adjusting element 21 changes, the amount of medium in the cooling channel 151 of the drive motor 62 can be reduced after a set time. Alternatively, after the position of the adjusting element 21 changes, the input torque of the drive motor 62 is detected, and if a decrease in the input current of the drive motor 62 is detected, the amount of medium in the cooling channel 112 is reduced.

[0256] According to some embodiments of this disclosure, as shown in Figure 17, the vehicle controller collects the torque and speed values ​​of the drive motor 62 under the current operating condition. Based on the torque and speed values, the vehicle controller determines whether the current operating condition is within the magnetic adjustment range according to the embedded magnetic adjustment range judgment logic. When the judgment point reaches the magnetic adjustment range, the magnetic adjustment motor 143 quickly controls the magnetic adjustment component 21 to move, performing real-time magnetic adjustment on the drive motor 62 to optimize the efficiency of the drive motor 62. The position signal of the magnetic adjustment component 21 is fed back to the magnetic adjustment motor 143, realizing precise control of the magnetic adjustment action. When the efficiency of the drive motor 62 is improved, the heat generation decreases, the cooling flow demand decreases, the system reduces the cooling power, and the third pump 182 reduces the flow supplied to the fourth flow path 152. The actuation signal of the magnetic adjustment motor 143 is fed back to the control algorithm. The control algorithm, based on the flow signal of the fourth flow path 152 and the actuation signal of the magnetic adjustment motor 143, adjusts the total flow of the fourth flow path 152 by controlling the opening of the first control valve 161.

[0257] According to some embodiments of this disclosure, as shown in FIG16, the generator 61 is equipped with a second magnetic flux adjustment component 14. The hybrid vehicle includes series or parallel operating conditions. When the vehicle is in series or parallel operating conditions, the control method further includes collecting the torque and speed values ​​of the engine 18, and determining whether the generator 61 needs magnetic flux adjustment based on the collected results. When it is determined that the generator 61 needs magnetic flux adjustment, the second magnetic flux adjustment component 14 operates to change the magnetic flux of the generator 61. The generator 61 is equipped with the second magnetic flux adjustment component 14, which allows the generator 61 to adjust the magnetic flux according to different operating conditions and needs to optimize the performance of the generator 61. The vehicle has multiple operating modes, including series operating conditions and parallel operating conditions. In series operating conditions, the engine 18 and the drive motor 62 are connected in sequence, and the engine 18 can cooperate with the generator 61 to supply power to the drive motor 62; while in parallel operating conditions, the engine 18 and the drive motor 62 can work simultaneously to jointly provide power.

[0258] The control method determines whether magnetic flux adjustment is needed based on the operating status of engine 18, and performs corresponding control when necessary. By collecting the torque and speed values ​​of engine 18, the operating status and performance of generator 61 can be determined. Based on the collected torque and speed values, the vehicle system performs a series of calculations and comparisons based on a preset algorithm or model to determine whether the current operating status of generator 61 requires magnetic flux adjustment. If the vehicle system determines that generator 61 needs magnetic flux adjustment, the vehicle's control unit will control the operation of the second magnetic flux adjustment component 14 to adjust the magnetic flux of generator 61, thereby optimizing the performance of generator 61.

[0259] According to some embodiments of this disclosure, the second magnetic adjustment assembly 14 includes a movable magnetic adjustment element 21 and a magnetic adjustment motor 143 for driving the magnetic adjustment element 21 to move. When the magnetic adjustment motor 143 operates to change the position of the magnetic adjustment element 21, the control method further includes reducing the medium flow rate of the cooling channel 151. When the generator 61 needs to perform magnetic adjustment operation, the magnetic adjustment motor 143 will first operate to change the position of the magnetic adjustment element 21 to optimize the magnetic field distribution and performance of the generator 61. After the magnetic adjustment operation, the efficiency of the generator 61 increases and the heat generation decreases, so the medium flow rate of the cooling channel 151 can be appropriately reduced.

[0260] According to some embodiments of this disclosure, the generator 61 is provided with a cooling channel 151. The control method further includes adjusting the amount of medium in the cooling channel 151 of the generator 61 when the magneto 143 is running. The position of the magneto adjusting element 21 can be controlled by the operation of the magneto 143. After the magneto 143 is running, the position of the magneto adjusting element 21 changes, which can increase or decrease the magnetic flux of the generator 61. Therefore, the heat generation of the generator 61 will also change accordingly. By adjusting the amount of medium in the cooling channel 151, the changes in heat generation can be adapted to improve energy efficiency.

[0261] According to some embodiments of this disclosure, the second magnetic adjustment assembly 14 includes a movable magnetic adjustment element 21 and a magnetic adjustment motor 143 for driving the magnetic adjustment element 21 to move. When the magnetic adjustment motor 143 operates to control the magnetic adjustment element 21 to move to a set position, it adjusts the amount of medium in the cooling channel 151 of the generator 61. By controlling the position of the magnetic adjustment element 21 in the generator 61, the magnetic adjustment motor 143 can optimize the performance of the generator 61. As the magnetic adjustment motor 143 operates, the magnetic adjustment element 21 moves to the set position, optimizing the magnetic field distribution of the generator 61, increasing the magnetic flux of the generator 61, thereby improving the performance and efficiency of the generator 61. The efficiency of the generator 61 is improved, and therefore the heat generation is correspondingly reduced. Energy consumption is reduced and operating costs are lowered by reducing the amount of medium in the cooling channel 151.

[0262] According to some embodiments of this disclosure, after the position of the adjusting element 21 is changed, the amount of medium in the cooling channel 151 of the generator 61 can be reduced after a set time. Alternatively, after the position of the adjusting element 21 is changed, the input torque of the generator 61 is detected, and if a decrease in the input current of the generator 61 is detected, the amount of medium in the cooling channel 112 is reduced.

[0263] According to some embodiments of this disclosure, as shown in Figure 18, the magnetization principle of the drive motor 62 in hybrid mode is similar to that in pure electric mode. The magnetization principle of the drive motor 62 has been described above, and the magnetization principle of the generator 61 will be described below. The vehicle controller collects the torque and speed values ​​of the engine 18 under the current operating conditions. Based on the torque and speed values, the vehicle controller determines whether the current operating conditions are within the magnetization range according to the embedded magnetization range judgment logic. When the judgment point reaches the magnetization range, the magnetization motor 143 quickly controls the movement of the magnetization component 21 to perform real-time magnetization of the generator 61 to optimize the efficiency of the generator 61. The position signal of the magnetization component 21 is fed back to the magnetization motor 143 to achieve precise control of the magnetization action. When the efficiency of the generator 61 is improved, the heat generation decreases, the cooling flow demand decreases, the system reduces the cooling power, and the third pump 182 reduces the flow supplied to the fourth flow path 152. The actuation signal of the magneto 143 is fed back to the control algorithm. The control algorithm adjusts the total flow of the fourth flow path 152 by controlling the opening of the first control valve 161 based on the flow signal of the fourth flow path 152 and the actuation signal of the magneto 143.

[0264] Referring to FIG24, a vehicle 300 applying the above control method according to some embodiments of the present disclosure is described below.

[0265] The vehicle 300 according to some embodiments of the present disclosure includes an execution module 500 for performing the control method described above. Since the vehicle according to some embodiments of the present disclosure includes the execution module 500 for performing the control method described above, the vehicle according to some embodiments of the present disclosure can intelligently adjust the magnetic flux of the drive motor 62 according to actual working conditions and needs, thereby optimizing the performance of the drive motor 62 and enabling the vehicle to maintain optimal performance under various working conditions.

[0266] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0267] In the description of this disclosure, "first feature" and "second feature" may include one or more of the features.

[0268] In the description of this disclosure, "multiple" means two or more.

[0269] In the description of this disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0270] In the description of this disclosure, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0271] In the description of this specification, the references to terms such as "some embodiments," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0272] Although some embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric drive system, comprising: At least one motor (1); as well as The magnetic adjustment component is configured to adjust the magnetic field strength or magnetic flux of the motor.

2. The electric drive system according to claim 1, wherein the magnetic adjustment component includes at least one first magnetic adjustment component (2), the first magnetic adjustment component (2) being configured to adjust the magnetic field strength of the motor (1); The electric drive system further includes a first controller (3) configured to control the first magnetic adjustment component (2) to adjust the magnetic field strength of the motor (1) to a target magnetic adjustment range.

3. The electric drive system according to claim 2, wherein, The first controller (3) is also configured to determine the corresponding target magnetic adjustment range based on the overall vehicle operating conditions.

4. The electric drive system according to claim 2 or 3, wherein, The first magnetizing component (2) includes: At least one magnetic adjustment element (21) is movably mounted on the motor (1); and An actuator (22) is connected to the magnetic adjustment element (21) and is configured to drive the magnetic adjustment element (21) to move relative to the motor (1) to adjust the magnetic field strength of the motor (1).

5. The electric drive system according to claim 4, wherein, The magnetic adjustment element (21) is movably disposed in at least one of the stator (17) or rotor (12) of the motor (1).

6. The electric drive system according to claim 5, wherein, The adjusting element (21) is movably disposed on the stator yoke (171) of the stator (17) of the motor (1), and the actuator (22) is further configured to drive the adjusting element (21) to move in order to adjust the magnetic flux through the stator teeth (172) of the stator (17).

7. The electric drive system according to claim 6, wherein, The at least one magnetic adjustment element (21) includes a plurality of magnetic adjustment elements (21), and at least some of the plurality of magnetic adjustment elements (21) can adjust the magnetic flux through the stator teeth (172) when they move.

8. The electric drive system according to claim 5, wherein, The magnetic adjustment element (21) is movably disposed inside the rotor (12) of the motor (1), on one radial side of the rotor (12), or at least one axial end of the rotor (12).

9. The electric drive system according to any one of claims 5 to 8, wherein, The adjusting element (21) includes an axial stator, and the actuator (22) is further configured to drive the adjusting element (21) to move in order to adjust the relative position of the rotor (12) and the axial stator.

10. The electric drive system according to any one of claims 4 to 9, wherein, The actuator (22) is also configured to drive the magnetizing element (21) to move relative to the motor (1) in at least one of the axial, circumferential and radial directions of the motor (1).

11. The electric drive system according to any one of claims 4 to 10, wherein, The magnetic adjustment component (21) is a magnetic conductor or a permanent magnet.

12. The electric drive system according to any one of claims 4 to 11, wherein, The actuator (22) is at least one of a telescopic rod, an actuating motor, or a robotic arm.

13. The electric drive system according to any one of claims 2-12, wherein, The at least one motor (1) includes a plurality of motors (1), and the at least one first magnetic adjustment component (2) includes a plurality of first magnetic adjustment components (2). Each of the plurality of motors (1) corresponds to one or more of the plurality of first magnetic adjustment components (2).

14. The electric drive system according to any one of claims 2 to 13, wherein, The electric drive system further includes a cooling assembly configured to regulate the temperature of the motor (1).

15. The electric drive system according to claim 14, wherein, The first controller (3) is also configured to determine the heating power corresponding to the motor (1) according to the target magnetic adjustment range, so that the cooling power of the cooling component matches the heating power.

16. The electric drive system according to claim 14 or 15, wherein, The cooling assembly includes a cooling flow path (41) and a first pump (42), wherein the cooling flow path (41) is connected to the motor (1) and the first pump (42) is located in the cooling flow path (41).

17. The electric drive system according to claim 16, wherein, The cooling assembly further includes a valve (43), which is disposed in the cooling flow path (41) and located between the first pump (42) and the motor (1). The valve (43) is configured to adjust the flow rate of the medium flowing from the cooling flow path (41) to the motor (1) in order to adjust the cooling power of the cooling assembly.

18. The electric drive system according to claim 17, wherein, The first pump (42) is connected to the motor (1) in a transmission connection.

19. The electric drive system according to claim 17 or 18, wherein, The cooling flow path (41) includes a first flow path (411) and a second flow path (412). The two ends of the first flow path (411) are respectively connected to the first pump (42) and the valve (43), and the two ends of the second flow path (412) are respectively connected to the valve (43) and the motor (1).

20. The electric drive system according to claim 19, wherein, The cooling flow path (41) further includes a third flow path (413), the two ends of which are connected to the valve (43) and the first pump (42) respectively.

21. The electric drive system according to claim 20, wherein, The first pump (42) has a pump outlet (421) and a pump inlet (422), and the valve (43) has a valve inlet (431), a first valve outlet (432) and a second valve outlet (433). The valve inlet (431) is connected to the pump outlet (421) through the first flow path (411), the first valve outlet (432) is connected to the motor (1) through the second flow path (412), and the second valve outlet (433) is connected to the pump inlet (422) through the third flow path (413). The valve (43) is configured to regulate the flow rate of the medium from the valve inlet (431) to the first valve outlet (432) and the second valve outlet (433).

22. The electric drive system according to any one of claims 19 to 21, wherein, The cooling assembly further includes a radiator (44) disposed in the second flow path (412).

23. The electric drive system according to claim 1, wherein, The at least one motor (1) includes a generator (61) and a drive motor (62); The electric drive system also includes a transmission mechanism, which is tractably connected to the generator (61) and the drive motor (62); The magnetic flux adjustment component includes a second magnetic flux adjustment component (14), which is configured to adjust the magnetic flux of at least one of the generator (61) or the drive motor (62).

24. The electric drive system according to claim 23 further includes a cooling channel (151) and a first control valve (161) for adjusting the amount of medium in the cooling channel (151), the cooling channel (151) being configured to cool the generator (61) and the drive motor (62).

25. The electric drive system according to claim 24, wherein, The cooling channel (151) is configured to cool at least one of the housing of the generator (61) and the drive motor (62), or the heat-generating elements within the housing.

26. The electric drive system according to claim 24 or 25, wherein, The electric drive system is configured to control the first control valve (161) to adjust the amount of medium in the cooling channel (151) when the second magnetizing component (14) is in operation.

27. The electric drive system according to any one of claims 24 to 26, further comprising a fourth flow path (152) connected to the cooling flow channel (151), wherein the first control valve (161) is configured to regulate the amount of medium in the fourth flow path (152).

28. The electric drive system according to claim 27 further includes an engine (18) and a coupling mechanism (19), the engine (18) being connected to the coupling mechanism (19), the coupling mechanism (19) having a first state and a second state, in the first state the engine (18) being connected to the axle drive through the coupling mechanism (19), and in the second state the engine (18) and the axle being decoupled.

29. The electric drive system according to claim 28, further comprising: The fifth flow path (153) is connected to the coupling mechanism (19); as well as A pressure regulating component (162) is configured to regulate the medium pressure of the fifth flow path (153).

30. The electric drive system according to claim 29, further comprising: A second control valve (163) is connected to the pressure regulating assembly (162) to control the outlet pressure of the pressure regulating assembly (162).

31. The electric drive system according to claim 29 or 30 further includes a second pump (181) connected to a media storage pool, the second pump (181) being connected to the fourth flow path (152) and the fifth flow path (153) respectively.

32. The electric drive system according to claim 31 further includes a third pump (182) connected to the media storage pool, the third pump (182) being connected to the fourth flow path (152).

33. The electric drive system according to any one of claims 23 to 32, wherein, The second magnetizing assembly (14) includes at least one movable magnetizing element (21) and a magnetizing motor (143) for driving the magnetizing element (21) to move.

34. The electric drive system according to claim 33, wherein, The magnetic adjustment element (21) is movably disposed in at least one of the following: The stator of the generator (61); the rotor of the generator (61); the stator of the drive motor (62); or the rotor of the drive motor (62).

35. The electric drive system according to claim 34, wherein, The adjusting element (21) is movably disposed on the stator yoke (171) of at least one of the generator (61) or the drive motor (62), and the adjusting motor (143) is configured to drive the adjusting element (21) to move in order to adjust the magnetic flux through the stator teeth (172) of the stator.

36. The electric drive system according to claim 34 or 35, wherein, The at least one magnetic adjustment element (21) includes a plurality of magnetic adjustment elements (21), and at least some of the plurality of magnetic adjustment elements (21) can adjust the magnetic flux through the stator teeth (172) of the stator when the magnetic adjustment elements (21) are moved.

37. The electric drive system according to claim 34, wherein, The magnetic adjustment element (21) is movably disposed in at least one of the following: The interior of the rotor of the generator (61), a radial side of the rotor, or at least one axial end of the rotor; or The drive motor (62) may be located inside the rotor, on a radial side of the rotor, or at least at one axial end of the rotor.

38. The electric drive system according to any one of claims 34 to 37, wherein, The adjusting element (21) includes an axial stator (146), and the adjusting motor (143) is configured to drive the adjusting element (21) to move in order to adjust the relative position of the rotor and the axial stator (146).

39. The electric drive system according to any one of claims 34 to 38, wherein, The magnetic adjustment element (21) satisfies at least one of the following: At least one of the following: the magnetic adjustment element (142) provided in the generator (61) can move along its axial direction, or the magnetic adjustment element (142) provided in the drive motor (62) can move along its axial direction; At least one of the following: the magnetic adjustment element (142) provided on the generator (61) is movable circumferentially, or the magnetic adjustment element (142) provided on the drive motor (62) is movable circumferentially; or At least one of the following is true: the magnetic adjustment element (142) provided in the generator (61) is movable radially therein, or the magnetic adjustment element (142) provided in the drive motor (62) is movable radially therein.

40. The electric drive system according to claim 1, wherein, The motor (1) includes: a drive motor (62); The magnetic flux adjustment component includes a second magnetic flux adjustment component (14), which is configured to adjust the magnetic flux of the drive motor (62); The electric drive system also includes a second controller configured to control the second magnetizing component (14) to move to the target position.

41. The electric drive system according to claim 40, further comprising a cooling channel (151) and a first control valve (161) for adjusting the amount of medium in the cooling channel (151), the cooling channel (151) being configured to cool the drive motor (62).

42. The electric drive system according to claim 41, wherein, The electric drive system is configured to control the first control valve (161) to adjust the amount of medium in the cooling channel (151) when the second magnetizing component (14) is in operation.

43. The electric drive system according to claim 41 or 42 further includes a fourth flow path (152) connected to the cooling flow channel (151), wherein the first control valve (161) is configured to regulate the amount of medium in the fourth flow path (152).

44. The electric drive system according to claim 43 further includes a second pump (181) connected to a media storage pool, the second pump (181) being connected to the fourth flow path (152).

45. The electric drive system according to any one of claims 41 to 44, wherein, The second controller is further configured to: determine the heat generation power corresponding to the drive motor (62) based on the target position, so that the cooling power of the cooling channel (151) matches the heat generation power.

46. ​​The electric drive system according to any one of claims 40 to 45, wherein, The second controller is also configured to determine the corresponding target position based on the overall vehicle operating conditions.

47. The electric drive system according to any one of claims 40 to 46, wherein, The second magnetizing assembly (14) includes a movable magnetizing element (21) and a magnetizing motor (143) for driving the magnetizing element (21) to move.

48. The electric drive system according to claim 47, wherein, The magnetic adjustment element (21) is movably disposed in at least one of the stator or rotor of the drive motor (62).

49. The electric drive system according to claim 48, wherein, The adjusting element (21) is movably disposed on the stator yoke (171) of the stator, and the adjusting motor (143) is configured to drive the adjusting element (21) to move in order to adjust the magnetic flux through the stator teeth (172) of the stator.

50. The electric drive system according to claim 48, wherein, The magnetic adjustment element (21) is movably disposed inside the rotor of the drive motor (62), on the radial side of the rotor, or at least one axial end of the rotor.

51. The electric drive system according to any one of claims 48 to 50, wherein, The magnetic adjustment element (21) can move relative to the drive motor (62) in at least one of its axial direction, circumferential direction and radial direction.

52. A method for controlling a vehicle, wherein, The vehicle is an electric drive system according to any one of claims 2 to 51, and the control method includes: adjusting the magnetic field strength or magnetic flux of the motor.

53. The vehicle control method according to claim 52, wherein, The vehicle includes an electric drive system according to any one of claims 23 to 37, the drive motor (62) is provided with the second magnetizing assembly (14), and the control method includes: Collect the torque and speed values ​​of the drive motor (62), and determine whether the drive motor (62) needs to be adjusted based on the collection results; When the drive motor (62) needs magnetic adjustment, the second magnetic adjustment component (14) operates to change the magnetic flux of the drive motor (62).

54. The vehicle control method according to claim 53, wherein, The drive motor (62) is provided with a cooling channel (151), and the control method further includes: When the second magnetic adjustment component (14) is running, it adjusts the amount of medium in the cooling channel (151) of the drive motor (62).

55. The vehicle control method according to claim 54, wherein, The second magnetic adjustment component (14) includes a movable magnetic adjustment element (21) and a magnetic adjustment motor (143) for driving the magnetic adjustment element (21) to move. When the magnetic adjustment motor (143) controls the magnetic adjustment element (21) to move to a set position, it adjusts the amount of medium in the cooling channel (151) of the drive motor (62).

56. The vehicle control method according to claim 53, wherein, The generator (61) is equipped with the second magnetic adjustment component (14), the vehicle includes series or parallel operating conditions, and when the vehicle is in the series or parallel operating condition, the control method further includes: Collect the torque and speed values ​​of the engine (18), and determine whether the generator (61) needs magnetic adjustment based on the collection results; When the generator (61) needs magnetic adjustment, the second magnetic adjustment component (14) operates to change the magnetic flux of the generator (61).

57. The vehicle control method according to claim 56, wherein, The generator (61) is provided with a cooling channel (151), and the control method further includes: When the second magnetic adjustment component (14) is running, it adjusts the amount of medium in the cooling channel (151) of the generator (61).

58. The vehicle control method according to claim 57, wherein, The second magnetic adjustment component (14) includes a movable magnetic adjustment element (21) and a magnetic adjustment motor (143) for driving the magnetic adjustment element (21) to move. When the magnetic adjustment motor (143) controls the magnetic adjustment element (21) to move to a set position, it adjusts the amount of medium in the cooling channel (151) of the generator (61).

59. The vehicle control method according to claim 52, wherein, The electric drive system includes: a motor (1) and a first magnetic adjustment component (2), the first magnetic adjustment component (2) being configured to adjust the magnetic field strength of the motor (1), and the control method of the electric drive system includes: Control the first magnetic adjustment component (2) to adjust the magnetic field strength of the motor (1) to the target magnetic adjustment range.

60. The vehicle control method according to claim 59, further comprising: Before controlling the first magnetic adjustment component (2), the corresponding target magnetic adjustment range is determined according to the overall vehicle operating conditions.

61. The vehicle control method according to claim 59 or 60, wherein, The electric drive system further includes a cooling assembly configured to regulate the temperature of the motor (1), and the control method of the electric drive system further includes: The heating power of the motor (1) is determined according to the target magnetic adjustment range, so that the cooling power of the cooling component matches the heating power.

62. A vehicle (100) comprising a memory, a processor, and a control program for an electric drive system stored in the memory and executable on the processor, wherein, when the processor executes the control program for the electric drive system, it implements the control method for the electric drive system according to any one of claims 59 to 61; or Includes an execution module (500) for performing the control method according to any one of claims 53 to 58.

63. A vehicle (400) comprising at least one electric drive system according to any one of claims 2-51.

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