Motor control system of dual-motor mining truck and dual-motor truck

Abstract

The utility model provides a motor control system of a dual-motor mining truck and the dual-motor truck, which relate to the field of automobiles, and adopt the scheme that a heat dissipation fan in a heat dissipation system is divided into two heat dissipation fan groups, and different heat dissipation fan groups adopt different control ports; therefore, the vehicle control unit can independently control all the cooling fan sets, the vehicle control unit can automatically select the cooling fan set needing to be started according to the magnitude of the required power, the cooling fan sets do not need to be in the working state in the full working condition range, and when the required power is low, the cooling fan sets can be turned on and turned off. In this way, the first cooling fan set or the second cooling fan set can be selected to enter the working state independently, the other cooling fan set does not need to work, and power consumption of the cooling fans is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a motor control system for a dual-motor mining truck and a dual-motor truck. Background Art

[0002] At present, most new energy mining trucks on the market adopt dual-motor type. The motor control system of dual-motor mining trucks mainly consists of the following parts:

[0003] Dual-motor drive system: This system contains two independent motors, each driving the truck's two drive wheels or drive shafts. This design allows the truck to have better traction and drive force distribution capabilities to adapt to different workloads and road conditions.

[0004] Controller: The controller is the core of the motor control system, responsible for receiving instructions from the driver or the automation system and adjusting the operating state of the motor according to the instructions. The controller also needs to monitor the operating state of the motor in real time to ensure that it operates within a safe range.

[0005] Sensors: Sensors are used to monitor various parameters of the truck, such as vehicle speed, motor temperature, battery status, etc. This data will be transmitted to the controller to optimize the control strategy of the motor.

[0006] Communication system: The communication system is used to realize data transmission between the controller and the motor, sensor and other systems. In dual-motor mining trucks, the communication system needs to have high reliability and anti-interference capabilities to ensure the accuracy and stability of data transmission.

[0007] The motor control system of a dual-motor mining truck generates a lot of heat and has many parts, so the reasonable design of the cooling system and the layout of the pipelines become a difficult problem for every manufacturer.

[0008] The motor is the core component of the motor control system of a dual-motor mining truck. Improving the life of the motor not only greatly improves the service life of the entire vehicle, but also reduces the energy consumption of the motor, which can also greatly reduce the production cost of the enterprise.

[0009] The electronic fan is a very important component in the vehicle cooling system. Its function is to accelerate the velocity and flow of air to enhance the cooling capacity of the vehicle and protect the power motor and controller from damage caused by overheating, which in turn causes the vehicle to be unable to operate normally. Therefore, the formulation of the electronic fan working strategy is crucial, and its rationality directly determines the stability and safety of the system. However, in the low-voltage system of the vehicle, the electronic fan is also a large energy-consuming component, especially when working in the summer, the ambient temperature is high, in order to meet the cooling requirements of the vehicle, the motor fan is basically in full working state, and the energy consumption is relatively large. How to reduce the energy consumption of the electronic fan is one of the technical problems that technicians in this field need to solve urgently. Utility Model Content

[0010] In view of this, an embodiment of the utility model provides a dual-motor mining truck motor control system and a dual-motor truck to solve the problem of high energy consumption of electronic fans in the prior art.

[0011] To achieve the above purpose, the present invention provides the following technical solutions:

[0012] A dual-motor mining truck motor control system, comprising:

[0013] Vehicle controller;

[0014] A first motor controller, wherein a control end of the first motor controller is connected to a first motor control interface of the vehicle controller;

[0015] A second motor controller, a control end of the second motor controller is connected to a second motor control interface of the vehicle controller;

[0016] a first motor, wherein an input end of the first motor is connected to an output end of the first motor controller;

[0017] a second motor, wherein an input terminal of the second motor is connected to an output terminal of the second motor controller;

[0018] A first cooling fan group, wherein an input end of the first cooling fan group is connected to a first fan control interface of the vehicle controller;

[0019] A second cooling fan group, wherein an input end of the second cooling fan group is connected to a second fan control interface of the vehicle controller.

[0020] Optionally, in the above-mentioned dual-motor mining truck motor control system, the first cooling fan group and the second cooling fan group are integrated on the radiator assembly.

[0021] Optionally, in the above-mentioned dual-motor mining truck motor control system, at least one of the first motor controller and the second motor controller is an all-in-one controller.

[0022] Optionally, in the above-mentioned dual-motor mining truck motor control system, the first motor controller is a five-in-one controller, and the second motor controller is a three-in-one controller.

[0023] Optionally, in the above-mentioned dual-motor mining truck motor control system, each of the first cooling fan group and the second cooling fan group includes at least one electronic fan.

[0024] Optionally, in the above-mentioned dual-motor mining truck motor control system, each of the first cooling fan group and the second cooling fan group includes two electronic fans.

[0025] Optionally, in the above-mentioned dual-motor mining truck motor control system, the maximum output power of each electronic fan in the first cooling fan group and the second cooling fan group is the same or at least partially the same.

[0026] Optionally, the above dual-motor mining truck motor control system further includes:

[0027] a first temperature sensor and a second temperature sensor;

[0028] The first temperature sensor is used to detect the temperature of the first motor, and the output end of the first temperature sensor is connected to the first motor temperature interface of the vehicle controller;

[0029] The second temperature sensor is used to detect the temperature of the second motor, and the output end of the second temperature sensor is connected to the second motor temperature interface of the vehicle controller.

[0030] Optionally, in the above-mentioned dual-motor mining truck motor control system, a comparator is configured in the vehicle controller, the first input end of the comparator is used to input the required power of the vehicle, the second input end of the comparator is used to input the rated power of the dual motors, and the output end of the comparator is connected to the fan control module in the vehicle controller.

[0031] A dual-motor truck is provided with any one of the dual-motor mining truck motor control systems described above.

[0032] Based on the above technical scheme, the above scheme provided by the embodiment of the utility model divides the cooling fans in the cooling system into two cooling fan groups, and different cooling fan groups use different control ports, so that the vehicle controller can control each cooling fan group individually, so that the vehicle controller can automatically select the cooling fan group to be turned on according to the required power, so that the cooling fan group does not need to be in a working state under the full operating range. When the required power is low, the first cooling fan group or the second cooling fan group can be selected to enter the working state alone, and the other cooling fan group does not need to work, thereby reducing the power consumption of the cooling fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0034] Figure 1 This is a schematic diagram of the structure of a motor control system for a dual-motor mining truck disclosed in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the structure of a heat dissipation fan assembly disclosed in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of a strategy for selecting a cooling fan group for a vehicle controller disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The dual-motor mining truck motor control system disclosed in the present application divides the cooling fans in the cooling system into two cooling fan groups. Different cooling fan groups use different control ports, so that the vehicle controller can control each cooling fan group individually, so that the vehicle controller can automatically select the cooling fan group to be turned on according to the required power, thereby reducing the power consumption of the cooling fan.

[0039] See also Figure 1 The dual-motor mining truck motor control system disclosed in this embodiment may include: a vehicle controller 10, a first motor controller 20, a second motor controller 30, a first motor 40, a second motor 50, a first cooling fan group 60 and a second cooling fan group 70;

[0040] About the vehicle controller 10: The vehicle controller (VCU, Vehicle Control Unit) is the core control component of the entire car, which plays a role in controlling the operation of the vehicle. Specifically, the functions of the vehicle controller mainly include the following aspects: ①, vehicle drive control: According to the driver's driving requirements, vehicle status and other working conditions, reasonably control the working state and power output of the motor to meet the requirements of driving conditions, including acceleration and deceleration, constant speed, braking and reverse conditions. ②, Braking energy feedback control: According to the brake pedal and accelerator pedal information, vehicle driving information, power battery status information, judge the braking mode, calculate the braking torque distribution, and recover part of the energy. ③, vehicle energy optimization: Through the coordination and management of the electric vehicle's motor drive system, battery management system, transmission system and other on-board energy-consuming components, the best energy utilization rate is obtained, thereby extending the service life. ④, Fault diagnosis and protection: Perform fault diagnosis and timely perform corresponding safety protection processing, including the storage and callback of fault codes. ⑤, Network management: Responsible for organizing information transmission, network status monitoring and network node management. ⑥. Vehicle status monitoring: The status information and fault diagnosis information of the respective jurisdiction objects are sent to the bus, and the vehicle controller displays them through the integrated digital instrument. In summary, the vehicle controller is the control center of each electronic control subsystem of the electric vehicle, responsible for coordinating and managing the operating status of the entire electric vehicle. It receives various operating instructions from the driver, such as acceleration, deceleration, braking, etc., and diagnoses and analyzes the status of the vehicle and components. The vehicle controller is also responsible for communicating with other control systems (such as the battery management system BMS) to ensure the coordinated operation of the entire system. In the scenario of the technical solution disclosed in the present application, the vehicle controller is mainly responsible for the control of the first motor 40, the second motor 50, the first cooling fan group 60 and the second cooling fan group 70.

[0041] About the motor controller: In the automotive system, the motor controller is mainly responsible for the following functions: ①, power conversion and power supply: The motor controller can convert the DC power stored in the power battery into the AC power required to drive the motor, thereby providing power for the motor. ②, control the driving state: According to the gear, throttle, brake and other instructions, the motor controller can control the driving state of the electric vehicle such as starting, running, forward and backward speed, and climbing strength. ③, energy recovery: When the vehicle brakes, the motor controller can store part of the braking energy in the power battery to achieve energy recovery and reuse. ④, protection function: The motor controller has a variety of protection functions, such as overcurrent protection, overload protection, undervoltage protection, overvoltage protection, phase loss protection, etc., to ensure the safe operation of electric vehicles. ⑤, provide auxiliary functions: The motor controller also has functions such as cruise control, idling, anti-shake, and active discharge, which improves driving comfort and safety. In summary, the motor controller plays a vital role in the electric vehicle system. It is not only a key component for power conversion and power supply, but also responsible for controlling the driving state of the vehicle, realizing energy recovery, and providing a variety of protection functions to ensure the safety and stable operation of the vehicle. At the same time, the motor controller also has a variety of auxiliary functions, which further enhances the driving experience of electric vehicles. In the scenario where the technical solution disclosed in this embodiment is applied, the control end of the first motor controller is connected to the first motor control interface of the vehicle controller; the control end of the second motor controller is connected to the second motor control interface of the vehicle controller; the first motor controller is used to respond to the control signal sent by the vehicle controller to control the first motor, and the second motor controller is used to respond to the control signal sent by the vehicle controller to control the second motor.

[0042] Regarding the motor, in the dual-motor system, each motor plays an important role, working together to drive the vehicle and optimize vehicle performance. The motors in the dual-motor system mainly realize the following functions: ①, power supply: As a device that converts electrical energy into mechanical energy, the motor is the core power source of the dual-motor system. They receive electrical energy from batteries or other energy sources and convert it into the mechanical energy required to drive the vehicle forward or backward. ②, Collaborative work: In a dual-motor system, the two motors can work together to provide a smoother and more efficient power output. For example, when the vehicle accelerates or climbs, the two motors can work at the same time to provide greater torque and power. When the vehicle is cruising or decelerating, one motor may be sufficient to meet the demand, and the other motor can enter standby or energy recovery mode. ③, Energy recovery: When the vehicle brakes or decelerates, the motor can convert the vehicle's kinetic energy into electrical energy by working in reverse and store it in the battery to achieve energy recovery. This energy recovery technology can improve the energy utilization efficiency of the vehicle and extend the cruising range. ④, Optimize performance: The dual-motor system can flexibly adjust the working status of the two motors according to different working conditions and needs. For example, when the vehicle turns, one motor can be responsible for driving the inner wheel, while the other motor is responsible for driving the outer wheel to achieve better handling and stability. In addition, the dual-motor system can also achieve more efficient energy utilization and longer cruising range by optimizing the torque distribution of the two motors. ⑤. Improve reliability: Since the dual-motor system has two independent motors, when one motor fails or fails, the other motor can still continue to work to ensure the basic driving ability of the vehicle. This redundant design can improve the reliability and safety of the system. In summary, the motors in the dual-motor system play an important role in providing power, working together, recovering energy, optimizing performance and improving reliability. In the use scenario of the technical solution disclosed in this embodiment, the input end of the first motor is connected to the output end of the first motor controller; the input end of the second motor is connected to the output end of the second motor controller; the first motor is used to obtain and respond to the motor control signal output by the output end of the motor controller, and the second motor is used to obtain and respond to the motor control signal output by the output end of the motor controller.

[0043] Regarding the cooling fan, in the dual-motor system, the main function of the cooling fan is to ensure that the motor and control system can be kept within the appropriate temperature range during operation to prevent overheating from causing damage to the equipment. Specifically, the role of the cooling fan is reflected in the following aspects: ①, temperature control: The cooling fan can effectively take away the heat inside the motor and control system through the cooling water circulation to prevent the equipment from overheating. In the case of overheating, the motor may cause aging of the insulation material, failure of the magnetic material, and even damage to the internal components of the motor. The cooling fan can reduce the temperature of the equipment and keep it running in the best working state. ②, improve efficiency: The cooling fan can effectively reduce the operating temperature of the motor and control system, thereby reducing resistance, reducing energy loss, and improving the operating efficiency of the equipment. ③, extend life: Excessive heat will accelerate the aging of the internal components of the motor and control system and reduce their service life. The cooling fan can effectively control the temperature of the equipment and extend its service life. In the dual-motor control system, the heat dissipation effect of the cooling fan is particularly important. Because the dual-motor system usually generates more heat, if it cannot be dissipated in time, it may cause serious damage to the equipment. In the technical solution disclosed in this embodiment, the input end of the first cooling fan group is connected to the first fan control interface of the vehicle controller; the input end of the second cooling fan group is connected to the second fan control interface of the vehicle controller. Since the first cooling fan group and the second cooling fan group are connected to different control interfaces of the vehicle controller, this method provides a hardware basis for the separate control of the first cooling fan group and the second cooling fan group, making it possible to separately control the working states of the electronic fans in the first cooling fan group and the second cooling fan group based on the required power.

[0044] In the technical solution disclosed in the above-mentioned embodiment of the present application, after generating a motor control signal, the vehicle controller sends the control signal to the first motor controller and the second motor controller respectively through the first motor control interface and the second motor control interface, and the first motor controller and the second motor controller generate drive signals for the first motor and the second motor according to the acquired control signal, and the first fan control interface of the vehicle controller is connected to the first cooling fan group, and the second fan control interface of the vehicle controller is connected to the second cooling fan group. This connection method provides hardware support for the vehicle controller to individually control the first cooling fan group and the second cooling fan group. At this time, the vehicle controller can individually control the working status of the first cooling fan group and the second cooling fan group according to the required power of the vehicle.

[0045] The dual-motor mining truck motor control system disclosed in the present application divides the cooling fans in the cooling system into two cooling fan groups. Different cooling fan groups use different control ports, so that the vehicle controller can control each cooling fan group individually, so that the vehicle controller can automatically select the cooling fan group to be turned on according to the required power, so that the cooling fan group does not need to be in working state under the full operating range. When the required power is low, the first cooling fan group or the second cooling fan group can be selected to enter the working state alone, and the other cooling fan group does not need to work, thereby reducing the power consumption of the cooling fan.

[0046] In the heat dissipation system, the radiator assembly refers to a complete radiator unit, which includes key components such as a water chamber, a water outlet chamber, and a radiator core. These components work together to control the heat dissipation components and enhance the heat dissipation capacity of the radiator, thereby cooling the engine accessories. In the radiator assembly, the coolant flows in the radiator core, and the air passes outside the radiator core to achieve heat exchange. In addition, the radiator assembly may also include other auxiliary components, such as electronic fans, etc., to further improve the heat dissipation efficiency. The first cooling fan group and the second cooling fan group disclosed in the embodiment of the present application can also be integrated in the radiator assembly. In the technical solution disclosed in this embodiment, the first cooling fan group and the second cooling fan group can be arranged side by side.

[0047] In the technical solution disclosed in this embodiment, the number of electronic fans in the first cooling fan group and the second cooling fan group can be set according to the cooling requirements. Specifically, at least one electronic fan can be set in each of the first cooling fan group and the second cooling fan group. Figure 2 , two electronic fans are respectively set in the first cooling fan group and the second cooling fan group, and the electronic fans in the first cooling fan group are recorded as electronic fan 1 and electronic fan 2, and the electronic fans in the second cooling fan group are recorded as electronic fan 3 and electronic fan 4. The type of the electronic fan can be selected according to the design requirements. For example, in the technical solution disclosed in this embodiment, the electronic fan can be a silicone oil clutch cooling fan, an electromagnetic clutch cooling fan, and an electric cooling fan. The maximum output power of each electronic fan in the first cooling fan group and the second cooling fan group can be selected according to user needs. Through the combination of the maximum output power of each electronic fan, the electronic fan can meet the output power requirements of the electronic fan within the full power requirement range of the car. For example, in the technical solution disclosed in the embodiment of the present application, the maximum output power of each electronic fan in the first cooling fan group and the second cooling fan group is the same, at least partially the same, or completely different.

[0048] The required power of the vehicle is different, the temperature of the radiator is different, and the output power of the required electronic fan is also different. Therefore, when the vehicle controller starts the electronic fan, it can automatically select the electronic fan to be started according to the required power of the vehicle. For details, see Figure 3 , the process may include:

[0049] Step S301: Obtain the required power of the entire vehicle.

[0050] Step S302: obtaining an identity of an electronic fan matching the required power based on a preset mapping table.

[0051] In this embodiment, a mapping relationship between the combination of the electronic fans and the required power can be pre-established in the preset mapping table. For example, when the required power is within range A, the corresponding cooling fan group is the identity of the electronic fans in the first cooling fan group; when the required power is within range B, the corresponding cooling fan group is the identity of the electronic fans in the second cooling fan group; when the required power is within range C, the corresponding required power is the identity of the electronic fans in the first cooling fan group and the second cooling fan group.

[0052] Step S303: controlling the electronic fan matching the identity identifier to enter a working state.

[0053] After the identities of the electronic fans to be started are determined, start instructions are sent to the electronic fans through the ports of the electronic fans, thereby starting the electronic fans.

[0054] In the technical solution disclosed in this embodiment, the types of the first motor controller and the second motor controller can be selected according to user needs. In the technical solution disclosed in this embodiment, both the first motor controller and the second motor controller can be implemented by an all-in-one controller. For example, the first motor controller is a five-in-one controller, and the second motor controller is a two-in-one controller. An all-in-one controller is a controller that integrates multiple control functions and can complete the control tasks of multiple systems at the same time. It integrates the functions of multiple controllers into one device to achieve control of multiple machines or equipment. This integration method can simplify the system architecture, reduce the space occupied by the equipment, improve the stability and reliability of the system, and reduce product costs. Using an all-in-one controller as a motor controller in a dual-motor control system has the following advantages:

[0055] Improve efficiency: The all-in-one controller can control multiple motors at the same time, realize the coordinated work of multiple systems, and thus improve the operating efficiency of the entire system.

[0056] Simplified system architecture: By integrating the functions of multiple controllers into one device, the all-in-one controller can simplify the system architecture, reduce system complexity, and make the system easier to manage and maintain.

[0057] Reduce costs: The integrated design of the all-in-one controller can reduce the number of devices and reduce system costs. At the same time, since the integrated design improves the stability and reliability of the system, it can also reduce the cost of subsequent repairs and maintenance.

[0058] Optimized control: The all-in-one controller has powerful data processing capabilities and intelligent control functions, which can control the operation of the motor more accurately and achieve more optimized control effects.

[0059] In the technical solution disclosed in this embodiment, when the vehicle controller controls the output power of the electronic fan and the motor, in addition to referring to the required power, it also needs to refer to the temperature of the electrode controller and the motor winding. Therefore, in the control system disclosed in the present application, corresponding temperature sensors for detecting the temperature of the motor controller and the motor can also be set, for example, including a first temperature sensor and a second temperature sensor for detecting the temperature of the motor, the first temperature sensor is used to detect the temperature of the first motor, and the output end of the first temperature sensor is connected to the first motor temperature interface of the vehicle controller; the second temperature sensor is used to detect the temperature of the second motor, and the output end of the second temperature sensor is connected to the second motor temperature interface of the vehicle controller.

[0060] The types of sensors for detecting the temperature of the motor mainly include temperature sensors, especially those sensors specifically used for monitoring the temperature of the motor. These sensors can provide real-time feedback on the changes in the temperature inside the motor, thereby determining whether the motor is in normal working condition. According to the measurement principle, temperature sensors are mainly divided into physical sensors and chemical sensors. Physical sensors are made by utilizing the characteristics that certain physical properties of the measured substance undergo obvious changes, while chemical sensors are made by utilizing sensitive elements that can convert chemical quantities such as the composition and concentration of chemical substances into electrical quantities. In this embodiment, physical sensors can be used as the first temperature sensor and the second temperature sensor, and of course, vibration sensors and current sensors can also be used. The vibration sensor can indirectly infer the temperature state of the motor by monitoring the vibration of the motor, because the vibration of the motor is often related to the temperature. The current sensor can monitor the current changes of the motor, because the current of the motor is also related to the temperature, and the temperature state of the motor can also be indirectly inferred through the change of the current.

[0061] Furthermore, in the technical solution disclosed in this embodiment, a built-in comparator can be used to assist the vehicle controller in selecting the first cooling fan group and the second cooling fan group. Specifically, the vehicle controller is configured with a comparator, and the first input end of the comparator is used to input the required power of the vehicle, and the second input end of the comparator is used to input the rated power of the dual motors, and the output end of the comparator is connected to the fan control module in the vehicle controller.

[0062] The following is a specific example to illustrate the application scenario of this solution:

[0063] When the vehicle is running, the vehicle controller determines whether dual motors or a single motor are needed to work at this time according to the required power of the current vehicle working state (full load, no load, flat road, uphill), the depth of the accelerator pedal and the current vehicle speed, and then sends a VCU instruction to the motor controller, controls the motor controller through the VCU instruction, and then controls the first motor and the second motor to work simultaneously through the motor controller, or controls the first motor to work alone through the first motor controller, or controls the second motor to work alone through the second motor controller;

[0064] If the vehicle controller VCU determines that the current vehicle state requires the first motor and the second motor to work at the same time, first, the vehicle controller VCU detects that the current vehicle power demand does not reach a certain ratio of the dual motor rated power, and at the same time detects that the current motor controller and motor winding temperature meet the conditions, then the vehicle controller VCU outputs a PWM signal, and controls the electronic fan in the first cooling fan group or the second cooling fan group to work alone through the PWM signal, so as to accelerate the cooling of all controllers and motors of the vehicle (the first cooling fan group is a PWM signal; the second electronic fan group is another PWM signal);

[0065] Second, when the vehicle controller VCU detects that the current power demand of the vehicle is large and reaches near the rated power of the dual motors, and at the same time detects that the current motor controller and motor winding temperature meet the conditions, the vehicle controller VCU outputs two PWM signals to control the electronic fans in the first cooling fan group and the second cooling fan group to work simultaneously, thereby accelerating the cooling of all controllers and motors of the vehicle.

[0066] If the power demand of the current working state of the whole vehicle only requires a single motor to work, the motor controller controls the first motor or the second motor to work alone; if the first motor is controlled to work alone, and the vehicle controller VCU detects that the internal temperature of the winding of the current motor controller and the first motor meets the conditions, the vehicle controller VCU outputs a corresponding PWM signal, and controls the electronic fan in the first cooling fan group to work alone through the PWM signal, so as to accelerate the cooling of the motor controller and the motor; if the second motor is controlled to work alone, and the vehicle controller VCU detects that the internal temperature of the winding of the current motor controller and the second motor meets the conditions, the vehicle controller VCU outputs a corresponding PWM signal, and controls the electronic fan corresponding to the second cooling fan group to work alone, so as to accelerate the cooling of the motor controller and the motor.

[0067] Based on the above embodiments, it can be seen that this solution has the following advantages:

[0068] First, compared with the previous scheme where the dual motors work as soon as the vehicle is started, this scheme allows the dual motors to work simultaneously or a single motor to work according to the power required by the vehicle, thereby improving the motor working efficiency, reducing the motor energy consumption, avoiding a big horse pulling a small vehicle, improving the motor power utilization rate, and reducing the energy consumption of the vehicle;

[0069] Secondly, compared with the past, when all motor fans worked as long as the power motor was working and the controller and motor temperature conditions were met, this control strategy is based on the current vehicle power demand state (single motor or dual motor working). At this time, the electronic fans can also work in full or two separately according to the motor working state; it also reduces energy consumption to a certain extent, while also reducing the operating frequency of the four motor fans, reducing the fan operating noise, and increasing the service life of the electronic fan.

[0070] Corresponding to the above solution, the present application also discloses a dual-motor truck, which is applied with any one of the dual-motor mining truck motor control systems described above.

[0071] In this embodiment, the dual-motor truck can be a hybrid dual-motor truck, a plug-in hybrid dual-motor truck, or a pure electric dual-motor truck.

[0072] Hybrid dual-motor truck: This truck uses a hybrid system that combines the power output of a fuel engine and an electric motor. The dual motors may be used to drive the wheels or assist the engine in energy recovery, etc. Plug-in hybrid dual-motor truck: This truck can be charged from an external power source and has both a fuel engine and an electric motor as power sources.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the present utility model, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0078] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-motor mining truck motor control system, characterized in that: include: Vehicle controller; A first motor controller, wherein a control end of the first motor controller is connected to a first motor control interface of the vehicle controller; A second motor controller, a control end of the second motor controller is connected to a second motor control interface of the vehicle controller; a first motor, wherein an input end of the first motor is connected to an output end of the first motor controller; a second motor, wherein an input terminal of the second motor is connected to an output terminal of the second motor controller; A first cooling fan group, wherein an input end of the first cooling fan group is connected to a first fan control interface of the vehicle controller; A second cooling fan group, wherein an input end of the second cooling fan group is connected to a second fan control interface of the vehicle controller.

2. The dual-motor mining truck motor control system according to claim 1, characterized in that: The first cooling fan group and the second cooling fan group are integrated on the radiator assembly.

3. The dual-motor mining truck motor control system according to claim 1, characterized in that: At least one of the first motor controller and the second motor controller is an all-in-one controller.

4. The dual-motor mining truck motor control system according to claim 3, characterized in that: The first motor controller is a five-in-one controller, and the second motor controller is a two-in-one controller.

5. The dual-motor mining truck motor control system according to claim 1, characterized in that: The first heat dissipation fan group and the second heat dissipation fan group each include at least one electronic fan.

6. The dual-motor mining truck motor control system according to claim 5, characterized in that: The first heat dissipation fan group and the second heat dissipation fan group each include two electronic fans.

7. The dual-motor mining truck motor control system according to claim 1, characterized in that: The maximum output powers of the electronic fans in the first cooling fan group and the second cooling fan group are the same or at least partially the same.

8. The dual-motor mining truck motor control system according to claim 1, characterized in that: Also includes: a first temperature sensor and a second temperature sensor; The first temperature sensor is used to detect the temperature of the first motor, and the output end of the first temperature sensor is connected to the first motor temperature interface of the vehicle controller; The second temperature sensor is used to detect the temperature of the second motor, and the output end of the second temperature sensor is connected to the second motor temperature interface of the vehicle controller.

9. The dual-motor mining truck motor control system according to claim 1, characterized in that: A comparator is configured in the vehicle controller, a first input end of the comparator is used to input the required power of the vehicle, a second input end of the comparator is used to input the rated power of the dual motors, and an output end of the comparator is connected to the fan control module in the vehicle controller.

10. A dual-motor truck, characterized in that: The dual-motor mining truck motor control system is applied as described in any one of claims 1 to 9.

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