An inductive electronic pump drive control system and control method for a liquid cooling system

Abstract

The application discloses an inductive electronic pump driving control system and a control method for a liquid cooling system, relates to the technical field of heat management, and the control system comprises a main driving motor, a motor driver and an inductive motor. The main driving motor comprises a motor stator core, a main coil and an auxiliary coil on the motor stator core. The auxiliary coil is arranged at the same position as the main coil on the motor stator core. Three-phase input ends of the auxiliary coil and three-phase input ends of the main coil generate three-phase inductive power through electromagnetic induction. The output ends are connected to the inductive motor to form a three-phase inductive input waveform, and the inductive motor is driven to synchronously operate with the main driving motor. Energy transmission and operation control of the inductive motor are directly realized through magnetic field coupling. The independent driver and control circuit of the inductive motor are omitted, the weight and volume of the system are significantly reduced, the energy consumption and failure rate are reduced, and the system integration and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and more specifically, to an induction electronic pump drive control system and control method for liquid cooling systems. Background Technology

[0002] In new energy aircraft and new energy vehicles, key power components such as motors and electronic controls typically employ liquid cooling systems (including water cooling or oil cooling) for heat dissipation. Currently, mainstream liquid cooling systems use one or more independent electronic pumps (such as electronic oil pumps / water pumps) as the circulation power source, achieving heat exchange by driving the flow of coolant. These electronic pumps are usually powered by low-voltage power supplies (such as 12V, 24V, or 48V) and integrate a motor driver, motor body, and pump head structure, forming an independent liquid cooling drive unit.

[0003] However, such existing technical solutions have several significant drawbacks. First, since electronic pumps are continuously operating high-load, low-voltage devices, their operation significantly increases the load on the high-to-low voltage DC-DC converters (DCDC) in the vehicle or machine. This not only increases the converter's capacity and cost but also adds extra system weight, negatively impacting energy efficiency and space layout. Second, the integrated motor driver within the electronic pump further presents challenges in terms of cost, weight, and reliability: if a permanent magnet synchronous motor (PMSM) is used as the pump drive motor, a high-performance motor driver, including sensors and complex speed control algorithms, is required, resulting in a complex and costly system; if a DC motor with a mechanical commutator (such as carbon brushes) is used, it suffers from short lifespan, low efficiency, and poor reliability, making it difficult to meet the high reliability and long lifespan requirements of new energy vehicles or the aerospace industry.

[0004] Furthermore, on new energy platforms with high-voltage electrical architectures such as 400V / 800V, the main drive motor typically has independent and redundant winding and control system resources. The electric pumps in existing liquid-cooled systems remain as external auxiliary components, failing to achieve effective energy and control integration with the main drive system, resulting in hardware redundancy and a decrease in overall energy efficiency.

[0005] Therefore, there is an urgent need to propose a new liquid cooling system drive scheme that can reduce the low-voltage conversion load, reduce the number of motor drivers, and improve system integration and overall reliability while ensuring system heat dissipation performance, so as to better meet the requirements of new energy vehicle platforms for lightweight, low cost and high reliability. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art. The present invention provides an induction electronic pump drive control system and control method for liquid cooling systems.

[0007] This invention provides an induction electronic pump drive control system for a liquid cooling system, including... The main drive motor is used to provide driving force for new energy aircraft or new energy vehicles; The motor driver is electrically connected to the three-phase input terminals of the main drive motor and is used to drive the main drive motor to work. An induction motor is used to drive the circulation of coolant in a liquid cooling system. An inductive coupling unit is provided, wherein the three-phase input terminal of the inductive coupling unit is coupled to the three-phase working magnetic field of the main drive motor, and is used to generate three-phase induced electrical energy through electromagnetic induction; the three-phase output terminal of the inductive coupling unit is electrically connected to the three-phase input terminal of the induction motor, and is used to output the induced electrical energy to the induction motor to drive the induction motor to run synchronously with the main drive motor.

[0008] Compared with existing technologies, the induction electronic pump drive control system proposed in this application has the following advantages: By setting an induction coupling unit coupled with the main drive motor, the working magnetic field generated by the main drive motor during operation directly induces three-phase induced electrical energy in the induction coupling unit to drive the induction motor of the liquid cooling system to run synchronously. By eliminating the independent induction motor driver and its auxiliary circuits, the complex synchronous control requirements between drivers are eliminated, the failure rate is reduced, and the energy loss caused by the power conversion link is reduced, significantly reducing the overall weight and volume of the system. The synchronous operation of the induction motor and the main drive motor ensures automatic matching between cooling demand and drive load, improving the system integration and maintenance convenience.

[0009] In one possible implementation, the inductive coupling unit is a secondary coil disposed within the main drive motor; The main drive motor includes a motor stator core and a main coil corresponding to the three-phase windings of a single unit. The auxiliary coil is wound on the motor stator core in the same position as the main coil. The three-phase input terminal of the main coil is electrically connected to the motor driver, and the three-phase output terminal of the auxiliary coil is electrically connected to the three-phase input terminal of the induction motor.

[0010] Compared with existing technologies, setting a secondary coil inside the main drive motor achieves extremely high system integration and space utilization efficiency. Furthermore, by changing the turns ratio of the secondary coil and the main coil, a separate external transformer can be completely eliminated, greatly reducing the system's size and weight. The secondary coil shares the same magnetic circuit with the main motor windings, resulting in extremely tight coupling, which significantly reduces magnetic leakage and energy transmission losses. It also ensures the synchronization of power and cooling, achieving efficient, reliable, and intelligent thermal management without the need for active intervention.

[0011] In one possible implementation, the main coil and / or the secondary coil are connected in a star configuration or a delta configuration.

[0012] Compared with existing technologies, driving induction motors through star or delta connection methods results in high operational reliability.

[0013] In one possible implementation, the inductive coupling unit is a transformer located outside the main drive motor; The main drive motor includes a motor stator core corresponding to the three-phase winding of a single unit and a main coil wound on it. One end of the primary coil of the transformer is electrically connected to the three-phase output terminal of the motor driver, and the other end of the primary coil of the transformer is electrically connected to the three-phase input terminal of the main coil. The secondary coil of the transformer is electrically connected to the three-phase input terminal of the induction motor.

[0014] Compared with existing technologies, there is no need to modify the original main drive motor. The induction motor can be driven through an independent transformer, reducing the need for induction motor driver settings and making the design more convenient.

[0015] In one possible implementation, the primary coil and / or secondary coil are connected in a star configuration or a delta configuration.

[0016] In one possible implementation, a controller is also included, which is communicatively connected to the motor driver. The controller receives operating parameters of the main drive motor and adjusts the output of the motor driver according to the operating parameters to control the speed of the induction motor.

[0017] In one possible implementation, the operating parameters include at least one of the main drive motor's speed, torque, and temperature.

[0018] Another technical solution of the present invention is to provide a control method for an induction electronic pump drive control system for a liquid cooling system, comprising the following steps: S1. The motor driver outputs a three-phase drive signal to the three-phase input terminal of the main drive motor to drive the main drive motor to run. S2. The three-phase working magnetic field generated during the operation of the main drive motor generates three-phase induced electrical energy in the inductive coupling unit through electromagnetic induction. The three-phase induced electrical energy is output to the induction motor through the three-phase output terminal of the inductive coupling unit, driving the induction motor to run synchronously with the main drive motor.

[0019] By utilizing the three-phase working magnetic field generated during the operation of the main drive motor as an energy medium, three-phase induced electrical energy is directly electromagnetically induced in the inductive coupling unit to drive the induction motor to run synchronously, thus realizing a simplified power transmission architecture that does not require the design of independent control circuits and drivers for the induction motor.

[0020] In summary, the present invention has the following advantages over the prior art: First, it achieves a high degree of integration and significant weight reduction of the control system, completely eliminating the need for dedicated induction motor drivers and complex control circuits, greatly reducing the system's size, weight and manufacturing cost, especially meeting the stringent weight and space requirements of aerospace and electric vehicle industries. Second, it ensures the natural synchronization and extremely high reliability of power output. The speed of the induction motor is strictly determined by the magnetic field of the main drive motor, realizing rigid synchronous operation between the two without delay or error. This ensures the real-time and accurate matching of coolant flow and host heat load, while eliminating control misalignment fault points that may occur with traditional independent drives. Third, it improves system energy efficiency and response speed. Energy is directly transmitted through electromagnetic induction, reducing losses in the power conversion process. Moreover, the system response depends only on the change of the main motor's magnetic field, resulting in a faster dynamic response. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an embodiment of the induction electronic pump drive control system for a liquid cooling system according to the present invention; Figure 2 This is a schematic diagram of the installation structure of the main coil and the auxiliary coil in Embodiment 1 of the present invention; Figure 3 This is a voltage waveform diagram generated by the main coil and the secondary coil in Embodiment 1 of the present invention; Figure 4 This is a structural diagram of a second embodiment of the induction electronic pump drive control system for a liquid cooling system according to the present invention.

[0022] Explanation of reference numerals in the attached figures: 1-Main drive motor; 11-Motor stator core; 12-Main coil; 2-Motor driver; 3-Induction motor; 4-Inductive coupling unit; 41-Secondary coil; 42-Transformer. Detailed Implementation

[0023] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0024] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0025] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] The first embodiment will now be described.

[0028] See Figures 1-3 As shown in the figure, this application discloses an induction electronic pump drive control system for a liquid cooling system, comprising: The main drive motor 1 is used to provide driving force for new energy aircraft or new energy vehicles; Motor driver 2 is electrically connected to the three-phase input terminal of main drive motor 1 and is used to drive main drive motor 1 to work. Induction motor 3 is used to drive the circulation of coolant in the liquid cooling system; The inductive coupling unit 4 has its three-phase input terminal coupled to the three-phase working magnetic field of the main drive motor 1, and is used to generate three-phase induced electrical energy through electromagnetic induction; the three-phase output terminal of the inductive coupling unit 4 is electrically connected to the three-phase input terminal of the induction motor 3, and is used to output the induced electrical energy to the induction motor 3 to drive the induction motor 3 to run synchronously with the main drive motor 1.

[0029] The main drive motor 1 and the induction motor 3 are both three-phase motors connected in a star configuration. The motor driver 2 is existing technology and only needs to be able to drive the main drive motor 1.

[0030] In this embodiment, the inductive coupling unit 4 is the secondary coil 41 corresponding to the three-phase winding in the main drive motor 1.

[0031] like Figure 2 As shown, the main drive motor 1 includes a stator core 11 and a main coil 12 corresponding to the three-phase windings of a single motor. The auxiliary coil 41 is wound on the stator core 11 in the same position as the main coil 12. The three-phase input terminal of the main coil 12 is electrically connected to the motor driver 2, and the three-phase output terminal of the auxiliary coil 41 is electrically connected to the three-phase input terminal of the induction motor 3. It is used to transmit induced electrical energy to the induction motor 3 to drive the induction motor 3 to run synchronously with the main drive motor 1.

[0032] By setting a secondary coil 41 inside the main drive motor 1, three-phase induced electrical energy is directly generated electromagnetically from the rotating working magnetic field produced by the main drive motor 1 during operation, which is used to drive the induction motor 3 of the liquid cooling system to run synchronously, significantly reducing the overall weight and volume of the system; by eliminating the independent induction motor 3 driver 2 and its auxiliary circuits, the complex synchronous control requirements between drivers are eliminated, the failure rate is reduced, and the energy loss caused by the power conversion link is reduced; the induction motor 3 runs synchronously with the main drive motor 1, ensuring automatic matching between cooling requirements and flight drive load, improving the system integration and maintenance convenience.

[0033] A secondary coil 41 is installed inside the main drive motor 1, achieving extremely high system integration and space utilization efficiency. Furthermore, by changing the turns ratio of the secondary coil 41 and the main coil 12, the independent external transformer can be completely eliminated, greatly reducing the system's size and weight. The secondary coil 41 shares the same magnetic circuit with the main motor winding, resulting in extremely tight coupling, which significantly reduces magnetic leakage and energy transmission loss. It also ensures the synchronization of power and cooling, achieving efficient, reliable, and intelligent thermal management without the need for active intervention.

[0034] The main coil 12 and / or the secondary coil 41 are connected in a star or delta configuration.

[0035] Specifically, the secondary coil 41 is connected in a star configuration: the first end of the secondary coil 41 is connected together to form a neutral point, and the second end of the secondary coil 41 serves as the three-phase output terminal of the secondary coil 4, which is electrically connected to the three-phase input terminal of the induction motor 3.

[0036] The secondary coil 41 is connected in a delta configuration: the secondary coil 41 is connected in series to form a first closed delta circuit. The connection point of the first closed delta circuit serves as the three-phase output terminal of the secondary coil 4 and is electrically connected to the three-phase input terminal of the induction motor 3.

[0037] In this embodiment, an induction electronic pump drive control system for a liquid cooling system further includes a controller. The controller is communicatively connected to the motor driver 2. The controller receives the operating parameters of the main drive motor 1 and adjusts the output of the motor driver 2 according to the operating parameters to control the speed of the induction motor 3.

[0038] The operating parameters include at least one of the following: the speed, torque, and temperature of the main drive motor.

[0039] Besides controlling the speed of the induction motor 3 via software, the turns ratio of the secondary coil 41 to the main coil 12 can be preset in hardware to control the drive parameters output to the induction motor 3. In other words, the ratio of the number of turns of the main coil 12 in the main drive motor 1 to the number of turns of the secondary coil 41 in the induction motor 3 is set according to the target drive voltage or current parameters of the induction motor 3, such as... Figure 3As shown, the red waveform represents the voltage waveform of the main coil, fully reflecting the changes in the alternating voltage in the main drive motor winding. The blue dashed line represents the voltage waveform of the secondary coil, which is completely synchronized with the voltage waveform of the main coil in terms of frequency, period, and phase. The zero-crossing and peak points are aligned with the voltage waveform of the main coil. The amplitudes of the main and secondary coils are scaled according to the turns ratio.

[0040] The second embodiment will now be described.

[0041] See Figure 2 As shown, this embodiment is basically the same as embodiment one, except that the inductive coupling unit 4 is different.

[0042] In this embodiment, the inductive coupling unit 4 is a transformer 42 corresponding to the three-phase windings disposed outside the main drive motor 1; The main drive motor 1 includes a motor stator core 11 corresponding to the three-phase winding of a single unit and a main coil 12 wound on it. One end of the primary coil of the transformer 42 is electrically connected to the three-phase output terminal of the motor driver 2, and the other end of the primary coil of the transformer 42 is electrically connected to the three-phase input terminal of the main coil 12. The secondary coil of the transformer 42 is electrically connected to the three-phase input terminal of the induction motor 3.

[0043] There is no need to modify the original main drive motor 1. The induction motor 3 can be driven by an independent transformer 42, which also eliminates the need to set up an induction motor driver, making the design more convenient.

[0044] The main coil 12 and / or the secondary coil are connected in a star or delta configuration.

[0045] Secondary coil star connection method: The first end of the secondary coil is connected to form a neutral point, and the second end of the secondary coil serves as a three-phase output terminal, which is electrically connected to the three-phase input terminal of the induction motor 3.

[0046] Secondary coil delta connection method: The secondary coils are connected in series to form a second closed delta circuit. The connection point of the second closed delta circuit serves as the three-phase output terminal and is electrically connected to the three-phase input terminal of the induction motor 3.

[0047] In practical design, transformer 42 can also be three ring magnets with two sets of coils each. In each ring magnet, one set of coils is connected to one phase of the main coil 12 in the main drive motor 1, and the other set of coils is connected to one phase of the three-phase input terminal of the induction motor 3.

[0048] The ratio of the primary winding to the secondary winding of transformer 42 is set according to the target drive voltage or current parameters of induction motor 3.

[0049] The third embodiment will now be described.

[0050] See Figure 1 and Figure 2 As shown, this embodiment relates to a control method for an induction electronic pump drive control system for a liquid cooling system, including the following steps: S1, Motor driver 2 outputs three-phase drive signals to the three-phase input terminal of main drive motor 1 to drive main drive motor 1 to run; S2. The three-phase working magnetic field generated by the main drive motor 1 during operation generates three-phase induced electrical energy in the inductive coupling unit 4 through electromagnetic induction. The three-phase induced electrical energy is output to the induction motor 3 through the three-phase output terminal of the inductive coupling unit 4, driving the induction motor 3 to run synchronously with the main drive motor 1.

[0051] By utilizing the three-phase working magnetic field generated during the operation of the main drive motor 1 as an energy medium, three-phase induced electrical energy is directly electromagnetically induced in the secondary coil 4, thereby driving the induction motor 3 to run synchronously, thus realizing a simplified power transmission architecture that does not require the design of independent control circuits and drivers for the induction motor 3.

[0052] In addition to being applied to new energy aircraft, the embodiments of this application can also be applied to new energy vehicles.

[0053] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0054] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An induction electronic pump drive control system for a liquid cooling system, characterized in that, include The main drive motor (1) is used to provide driving force for new energy aircraft or new energy vehicles; The motor driver (2) is electrically connected to the three-phase input terminal of the main drive motor (1) and is used to drive the main drive motor (1) to work. Induction motor (3) is used to drive the circulation of coolant in the liquid cooling system; The inductive coupling unit (4) has its three-phase input terminal coupled to the three-phase working magnetic field of the main drive motor (1) for generating three-phase induced electric energy through electromagnetic induction; the three-phase output terminal of the inductive coupling unit (4) is electrically connected to the three-phase input terminal of the induction motor (3) for outputting induced electric energy to the induction motor (3) to drive the induction motor (3) to run synchronously with the main drive motor (1).

2. The induction electronic pump drive control system for a liquid cooling system according to claim 1, characterized in that, The inductive coupling unit (4) is a secondary coil (41) disposed in the main drive motor (1). The main drive motor (1) includes a motor stator core (11) and a main coil (12) corresponding to the three-phase winding of the single unit. The auxiliary coil (41) is wound on the motor stator core (11) in the same position as the main coil (12). The three-phase input terminal of the main coil (12) is electrically connected to the motor driver (2), and the three-phase output terminal of the auxiliary coil (41) is electrically connected to the three-phase input terminal of the induction motor (3).

3. The induction electronic pump drive control system for a liquid cooling system according to claim 2, characterized in that, The main coil (12) and / or the secondary coil (41) are connected in a star or delta configuration.

4. The induction electronic pump drive control system for a liquid cooling system according to claim 1, characterized in that, The inductive coupling unit (4) is a transformer (42) located outside the main drive motor (1). The main drive motor (1) includes a motor stator core (11) corresponding to the three-phase winding of a single unit and a main coil (12) wound on it. One end of the primary coil of the transformer (42) is electrically connected to the three-phase output terminal of the motor driver (2), and the other end of the primary coil of the transformer (42) is electrically connected to the three-phase input terminal of the main coil (12). The secondary coil of the transformer (42) is electrically connected to the three-phase input terminal of the induction motor (3).

5. The induction electronic pump drive control system for a liquid cooling system according to claim 4, characterized in that, The main coil (12) and / or the secondary coil are connected in a star or delta configuration.

6. The induction electronic pump drive control system for a liquid cooling system according to claim 1, characterized in that, It also includes a controller, which is connected in communication with the motor driver (2). The controller receives the operating parameters of the main drive motor (1) and adjusts the output of the motor driver (2) according to the operating parameters to control the speed of the induction motor (3).

7. The induction electronic pump drive control system for a liquid cooling system according to claim 6, characterized in that, The operating parameters include at least one of the following: the speed, torque, and temperature of the main drive motor.

8. A control method for an induction electronic pump drive control system for a liquid cooling system as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The motor driver (2) outputs a three-phase drive signal to the three-phase input terminal of the main drive motor (1) to drive the main drive motor (1) to run. S2. The three-phase working magnetic field generated by the main drive motor (1) during operation generates three-phase induced electric energy in the inductive coupling unit (4) through electromagnetic induction. The three-phase induced electric energy is output to the induction motor (3) through the three-phase output terminal of the inductive coupling unit (4), driving the induction motor (3) to run synchronously with the main drive motor (1).

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