Control method and device of vehicle driving system and vehicle driving system

Abstract

The application provides a control method and device of a vehicle driving system and the vehicle driving system. The method comprises the following steps: obtaining the temperature and power of a traction motor at a current time, so as to obtain a current motor temperature and a current motor power; and adjusting the rotating speeds of a first fan and a second fan according to the current motor temperature and / or the current motor power, so as to simultaneously cool the generator, the converter and the traction motor. The purpose of simultaneously cooling the generator, the converter and the traction motor is achieved, the heat dissipation efficiency of the vehicle driving system is improved, and thus the problem that the existing scheme only cools the traction motor by installing a fan, thereby resulting in poor heat dissipation effect of the driving system of the vehicle is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle cooling technology, and more specifically, to a control method, apparatus, computer-readable storage medium, electronic device, and vehicle drive system for a vehicle drive system. Background Technology

[0002] The vehicle's drive system includes a generator, a converter, and a traction motor. The generator is electrically connected to the traction motor through the converter to drive the vehicle. However, the generator, converter, and traction motor all generate heat during operation. If the generator, converter, and traction motor cannot be cooled, they will malfunction. The current solution is simply to install a fan to cool the traction motor, resulting in poor heat dissipation of the vehicle's drive system. Summary of the Invention

[0003] The main objective of this application is to provide a control method, apparatus, computer-readable storage medium, electronic device, and vehicle drive system for a vehicle drive system, so as to at least solve the problem that the existing solutions only cool the traction motor by installing a fan, resulting in poor heat dissipation of the vehicle drive system.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for a vehicle drive system is provided, applied to a controller in the vehicle drive system. The vehicle drive system further includes a generator, a converter, a first fan, a second fan, and a traction motor. The traction motor, the first fan, and the second fan communicate with the controller. The generator is electrically connected to the input terminal of the converter, and the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator through a first duct, the input terminal of the second fan is connected to a second duct, the converter is located inside the second duct, and the output terminal of the second fan is connected to the traction motor through a third duct. The method includes: acquiring the temperature and power of the traction motor at a current moment to obtain the current motor temperature and current motor power; and adjusting the rotational speeds of at least the first fan and the second fan based on the current motor temperature and / or the current motor power to simultaneously cool the generator, the converter, and the traction motor.

[0005] Optionally, adjusting the rotational speeds of the first and second fans based on the current motor temperature or the current motor power includes: adjusting the rotational speeds of the first and second fans to a first preset speed when the current motor temperature is less than a first temperature threshold; adjusting the rotational speeds of the first and second fans to a second preset speed when the current motor temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, wherein the second preset speed is greater than the first preset speed and the second temperature threshold is greater than the first temperature threshold; adjusting the rotational speeds of the first and second fans to the first preset speed when the current motor power is less than a first power threshold; and adjusting the rotational speeds of the first and second fans to the second preset speed when the current motor power is greater than or equal to the first power threshold and less than the second power threshold.

[0006] Optionally, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input end of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. Based on the current motor temperature or the current motor power, at least the speeds of the first fan and the second fan are adjusted, including: when the current motor temperature is greater than or equal to the second temperature threshold, adjusting the speeds of the first fan and the second fan to a third preset speed and adjusting the opening degree of the solenoid valve to a preset opening degree, wherein the third preset speed is greater than the second preset speed; and when the current motor power is greater than or equal to the second power threshold, adjusting the speeds of the first fan and the second fan to the first preset speed and adjusting the opening degree of the solenoid valve to a preset opening degree.

[0007] Optionally, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. Based on the current motor temperature and the current motor power, the speeds of the first fan and the second fan are adjusted, including: when the current motor temperature is less than a first temperature threshold and the current motor power is less than a first power threshold, adjusting the speeds of the first fan and the second fan to a first preset speed; when the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than a second temperature threshold. If the current motor power is greater than or equal to the first power threshold and less than the second power threshold, the speeds of the first and second fans are adjusted to a third preset speed, which is greater than the first preset speed, and the second temperature threshold is greater than the first temperature threshold. If the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the speeds of the first and second fans are adjusted to a second preset speed, and the opening of the solenoid valve is adjusted to a preset opening, which is greater than the first preset speed and less than the third preset speed.

[0008] Optionally, the method further includes: generating an alarm message when the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the alarm message being used to remind staff to stop the vehicle and check for malfunctions.

[0009] Optionally, obtaining the power of the traction motor at the current moment to obtain the current motor power includes: obtaining the torque of the traction motor at the current moment to obtain the current torque; and determining the current motor power based on the torque conversion coefficient and the current torque, wherein the torque conversion coefficient is the conversion coefficient between the current torque and the current motor power.

[0010] According to another aspect of this application, a control device for a vehicle drive system is provided, the device comprising:

[0011] The acquisition unit is used to acquire the temperature and power of the traction motor at the current moment, and obtain the current motor temperature and current motor power. In the initial state, the opening degree of the solenoid valve is 0.

[0012] The control unit is configured to adjust the speed of at least the first fan and the second fan according to the current motor temperature and / or the current motor power, so as to simultaneously cool the generator, the converter and the traction motor.

[0013] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the control methods of the vehicle drive system described above.

[0014] According to another aspect of this application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute any of the control methods of the vehicle drive system described above through the computer program.

[0015] According to another aspect of this application, a vehicle drive system is provided, comprising: a controller, a generator, a converter, a first fan, a second fan, a traction motor, and a solenoid valve. The traction motor, the first fan, the second fan, and the solenoid valve communicate with the controller. The generator is electrically connected to the input terminal of the converter, and the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator via a first duct. The input terminal of the second fan is connected to a second duct and a fourth duct. The converter is located inside the second duct. The solenoid valve is installed inside the fourth duct. The output terminal of the second fan is connected to the traction motor via a third duct. The controller is used to execute any of the control methods of the vehicle drive system described above.

[0016] By applying the technical solution of this application, two types of fans are set up. One fan directly draws air to the generator to cool it down, while the other fan draws air to the inverter first and then to the traction motor. At the same time, based on the current motor temperature and / or the current motor power, the speeds of at least the first and second fans are adjusted to achieve the purpose of cooling the generator, the inverter, and the traction motor simultaneously. This improves the heat dissipation efficiency of the vehicle drive system and solves the problem that existing solutions only cool the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A schematic flowchart of a control method for a vehicle drive system according to an embodiment of this application is shown.

[0019] Figure 2 A flowchart illustrating another control method for a vehicle drive system is shown.

[0020] Figure 3 A structural block diagram of a control device for a vehicle drive system according to an embodiment of this application is shown;

[0021] Figure 4 A connection diagram of the generator, converter, first fan, second fan, and traction motor is shown.

[0022] Figure 5 A schematic diagram of the first fan's blowing principle is shown;

[0023] Figure 6 A schematic diagram of the second fan's blowing principle is shown. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] As described in the background section, a vehicle's drive system includes a generator, a converter, and a traction motor. The generator is electrically connected to the traction motor via the converter to drive the vehicle. However, the generator, converter, and traction motor all generate heat during operation. If the generator, converter, and traction motor cannot be cooled, they will malfunction. Existing solutions only cool the traction motor by installing a fan, resulting in poor heat dissipation of the vehicle's drive system. To address the problem of poor heat dissipation of the vehicle's drive system due to the existing solution of only cooling the traction motor by installing a fan, embodiments of this application provide a control method, apparatus, computer-readable storage medium, electronic device, and vehicle drive system for a vehicle drive system.

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] This application provides a control method for a vehicle drive system, which is applied to a controller in a vehicle drive system. The vehicle drive system further includes a generator, a converter, a first fan, a second fan, and a traction motor. The traction motor, the first fan, and the second fan communicate with the controller. The generator is electrically connected to the input terminal of the converter. The output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator through a first air duct. The input terminal of the second fan is connected to the second air duct. The converter is located inside the second air duct. The output terminal of the second fan is connected to the traction motor through a third air duct.

[0030] Figure 1 This is a schematic flowchart of a control method for a vehicle drive system provided according to an embodiment of this application.

[0031] like Figure 1 As shown, the method includes the following steps:

[0032] Step S201: Obtain the temperature and power of the traction motor at the current moment to obtain the current motor temperature and current motor power;

[0033] Specifically, since temperature and power are the parameters that best reflect the state of the traction motor at the current moment, it is necessary to obtain temperature and power.

[0034] Step S201, namely obtaining the power of the traction motor at the current moment, includes: obtaining the torque of the traction motor at the current moment, and obtaining the current torque; determining the current motor power based on the torque conversion coefficient and the current torque, wherein the torque conversion coefficient is the conversion coefficient between the current torque and the current motor power.

[0035] Specifically, the conversion factor is 9550, and the current motor power = current torque / 9550, thus the power can be accurately calculated.

[0036] Step S202: Based on the current motor temperature and / or the current motor power, adjust the speed of at least the first fan and the second fan to simultaneously cool down the generator, the converter and the traction motor.

[0037] Through the above embodiments, two types of fans are set up. One fan directly draws air to the generator to cool it down, while the other fan draws air to the inverter first and then to the traction motor. At the same time, based on the current motor temperature and / or the current motor power, the speeds of at least the first and second fans are adjusted to achieve the purpose of simultaneously cooling the generator, the inverter, and the traction motor. This improves the heat dissipation efficiency of the vehicle drive system and solves the problem that existing solutions only cool the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system.

[0038] Step S202, adjusting the speeds of at least the first and second fans based on the current motor temperature or the current motor power, includes: adjusting the speeds of the first and second fans to a first preset speed when the current motor temperature is less than a first temperature threshold; adjusting the speeds of the first and second fans to a second preset speed when the current motor temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, wherein the second preset speed is greater than the first preset speed and the second temperature threshold is greater than the first temperature threshold; adjusting the speeds of the first and second fans to the first preset speed when the current motor power is less than a first power threshold; and adjusting the speeds of the first and second fans to the second preset speed when the current motor power is greater than or equal to the first power threshold and less than the second power threshold.

[0039] Specifically, in the case of adjusting the speed based solely on temperature: the current motor temperature needs to be compared with both the first and second temperature thresholds. If the current motor temperature is lower than the first temperature threshold, it is determined that the heat dissipated by the traction motor at the current moment is low, and only the normal starting fan speed (which can be the fan speed corresponding to the first setting) is needed to cool it down. Therefore, the first preset speed is used to drive the two fans. If the current motor temperature is greater than or equal to the first temperature threshold and lower than the second temperature threshold, it is determined that the heat dissipated is high, and a fan speed exceeding the normal starting fan speed (which can be the fan speed corresponding to the second setting) is needed to cool it down. Therefore, the second preset speed is used to drive the two fans.

[0040] When adjusting the speed based solely on power: The current motor power needs to be compared with both the first and second preset speeds. If the current motor power is less than the first power threshold, similar to temperature adjustment, the traction motor is in a low-power state, and the fan can be driven at the first preset speed. If the current motor power is greater than or equal to the first power threshold and less than the second power threshold, similar to temperature adjustment, the traction motor is in a medium-power state, and the fan can be driven at the second preset speed.

[0041] In some embodiments of this application, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct, and in the initial state, the opening degree of the solenoid valve is 0.

[0042] Step S202, adjusting the speeds of at least the first and second fans based on the current motor temperature or the current motor power, includes:

[0043] When the current motor temperature is greater than or equal to the second temperature threshold, the speed of the first fan and the second fan is adjusted to a third preset speed, and the opening of the solenoid valve is adjusted to a preset opening. The third preset speed is greater than the second preset speed.

[0044] Specifically, if the current motor temperature is greater than or equal to the second temperature threshold, it is determined that the heat dissipated by the traction motor at the current moment is also higher than that of the inverter. This will cause the air introduced by the second fan to overheat after passing through the inverter, thereby reducing the cooling effect on the traction motor. It is necessary to use the third preset speed (which can be the three speed settings of the fan) to drive the fan. Therefore, the solenoid valve needs to be opened to introduce new air from the fourth air duct to the second fan to cool the air blown by the second fan to the traction motor, thereby improving the subsequent cooling effect on the traction motor.

[0045] When the current motor power is greater than or equal to the second power threshold, the speed of the first fan and the second fan is adjusted to the first preset speed, and the opening of the solenoid valve is adjusted to the preset opening.

[0046] Specifically, when the current motor power is greater than or equal to the second power threshold, the traction motor is considered to be in a high-power state. However, if the fan is adjusted to the third preset speed when the traction motor is in a high-power state, it may affect the operation of the traction motor. Therefore, in order to ensure the normal operation of the traction motor, the fan is operated at the minimum wind speed, that is, the fan is driven at the first preset speed. At the same time, the solenoid valve is opened to introduce fresh air from the fourth air duct to the second fan to cool the air blown by the second fan to the traction motor, thereby improving the cooling effect of the traction motor.

[0047] Specifically, the fan speed and solenoid valve opening are adjusted based on the traction motor's temperature and power. The solenoid valve opening is adjusted because, under high-power operation, the converter dissipates significant heat, which could cause the intake air temperature to rise excessively. Adding an extra air duct lowers the air temperature, thus improving the cooling effect for the downstream traction motor.

[0048] In some embodiments of this application, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct, and in the initial state, the opening degree of the solenoid valve is 0.

[0049] Step S202, which involves adjusting the speeds of at least the first and second fans based on the current motor temperature and current motor power, includes:

[0050] When the current motor temperature is less than the first temperature threshold and the current motor power is less than the first power threshold, the speed of the first fan and the second fan is adjusted to the first preset speed.

[0051] Specifically, when the current motor temperature is less than the first temperature threshold and the current motor power is less than the first power threshold, the cooling work can be completed by using a normal drive fan, that is, the fan can be driven to operate at the first preset speed.

[0052] When the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than the second temperature threshold, and the current motor power is greater than or equal to the first power threshold and the current motor power is less than the second power threshold, the speed of the first fan and the second fan is adjusted to a third preset speed, where the third preset speed is greater than the first preset speed and the second temperature threshold is greater than the first temperature threshold.

[0053] Specifically, if the current motor temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, and the current motor power is greater than or equal to the first power threshold and less than the second power threshold, it indicates that the traction fan is in a medium power state and has high heat dissipation, requiring an increase in wind speed. In order to cool down as quickly as possible, and since the power of the motor will not affect the normal operation of the traction fan when it is in a medium power state, the highest wind speed, i.e., the third preset wind speed, is used to drive the motor to operate, so that the traction motor, generator and converter can cool down as quickly as possible.

[0054] When the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the speed of the first fan and the second fan is adjusted to the second preset speed, and the opening of the solenoid valve is adjusted to the preset opening. The second preset speed is greater than the first preset speed and less than the third preset speed.

[0055] Specifically, if the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, it indicates that the traction fan is overheating and operating at high power. If the fan is adjusted to the third preset speed, it may affect the operation of the traction motor. Therefore, in order to ensure the normal operation of the traction motor, the fan is operated at the minimum wind speed, i.e., the fan is driven at the first preset speed. At the same time, the solenoid valve is opened to introduce fresh air from the fourth air duct to the second fan to cool the air blown by the second fan to the traction motor, thereby improving the cooling effect of the traction motor. Adjusting the fan speed to the second preset speed can also cool the motor while ensuring its normal operation.

[0056] In some embodiments of this application, the method further includes: generating alarm information when the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, wherein the alarm information is used to remind staff to stop the vehicle and check for malfunctions.

[0057] Specifically, if the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the staff should be reminded to stop the vehicle and check for malfunctions to prevent excessive power and high temperature from affecting subsequent use.

[0058] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the vehicle drive system control method of this application will be described in detail below with reference to specific embodiments.

[0059] This embodiment relates to a specific control method for a vehicle drive system. The method is applied to a controller of the vehicle drive system, which also includes a generator, a converter, a first fan, a second fan, a traction motor, and a solenoid valve. The traction motor, the first fan, the second fan, and the solenoid valve communicate with the controller. The generator is electrically connected to the input terminal of the converter, and the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator via a first duct. The input terminal of the second fan is connected to both a second duct and a fourth duct. The converter is located inside the second duct, and the solenoid valve is installed inside the fourth duct. The output terminal of the second fan is connected to the traction motor via a third duct. Figure 2 As shown, it includes the following steps:

[0060] Step S1: Obtain the torque of the traction motor at the current moment to get the current torque;

[0061] Step S2: Determine the current motor power based on the torque conversion coefficient and the current torque. The torque conversion coefficient is the conversion factor between the current torque and the current motor power.

[0062] Step S3: When the current motor temperature is less than the first temperature threshold and the current motor power is less than the first power threshold, adjust the speed of the first fan and the second fan to the first preset speed.

[0063] When the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than the second temperature threshold, and the current motor power is greater than or equal to the first power threshold and the current motor power is less than the second power threshold, the speed of the first fan and the second fan is adjusted to a third preset speed, where the third preset speed is greater than the first preset speed and the second temperature threshold is greater than the first temperature threshold.

[0064] When the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the speed of the first fan and the second fan is adjusted to the second preset speed, and the opening of the solenoid valve is adjusted to the preset opening. The second preset speed is greater than the first preset speed and less than the third preset speed.

[0065] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0066] This application also provides a control device for a vehicle drive system. It should be noted that the control device for the vehicle drive system in this application can be used to execute the control method for a vehicle drive system provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0067] The control device for the vehicle drive system provided in the embodiments of this application will be described below.

[0068] Figure 3 This is a structural block diagram of a control device for a vehicle drive system provided according to an embodiment of this application. Figure 3 As shown, the device includes:

[0069] The acquisition unit 41 is used to acquire the temperature and power of the traction motor at the current moment, and obtain the current motor temperature and current motor power. In the initial state, the opening degree of the solenoid valve is 0.

[0070] Control unit 42 is used to adjust the speed of at least the first fan and the second fan according to the current motor temperature and / or the current motor power, so as to simultaneously cool the generator, the converter and the traction motor.

[0071] The aforementioned device incorporates two types of fans: one fan directly draws air into the generator to cool it, while the other fan draws air into the converter first and then into the traction motor. Simultaneously, based on the current motor temperature and / or current motor power, the speeds of at least the first and second fans are adjusted to simultaneously cool the generator, converter, and traction motor. This improves the heat dissipation efficiency of the vehicle's drive system and solves the problem of poor heat dissipation in existing solutions that only cool the traction motor by installing fans.

[0072] In some embodiments of this application, the control unit includes a first control module, a second control module, a third control module, and a fourth control module. The first control module is used to adjust the rotational speed of the first fan and the second fan to a first preset rotational speed when the current motor temperature is less than a first temperature threshold. The second control module is used to adjust the rotational speed of the first fan and the second fan to a second preset rotational speed when the current motor temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold. The second preset rotational speed is greater than the first preset rotational speed, and the second temperature threshold is greater than the first temperature threshold. The third control module is used to adjust the rotational speed of the first fan and the second fan to the first preset rotational speed when the current motor power is less than a first power threshold. The fourth control module is used to adjust the rotational speed of the first fan and the second fan to the second preset rotational speed when the current motor power is greater than or equal to the first power threshold and less than the second power threshold.

[0073] In some embodiments of this application, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input end of the second fan is also connected to the fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. The control unit includes a fifth control module and a sixth control module. The fifth control module is used to adjust the speed of the first fan and the second fan to a third preset speed and adjust the opening degree of the solenoid valve to a preset opening degree when the current motor temperature is greater than or equal to the second temperature threshold. The third preset speed is greater than the second preset speed. The sixth control module is used to adjust the speed of the first fan and the second fan to the first preset speed and adjust the opening degree of the solenoid valve to a preset opening degree when the current motor power is greater than or equal to the second power threshold.

[0074] In some embodiments of this application, the vehicle drive system further includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to the fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. The control unit includes a seventh control module, an eighth control module, and a ninth control module. The seventh control module is used to adjust the speed of the first fan and the second fan to a first preset speed when the current motor temperature is less than a first temperature threshold and the current motor power is less than a first power threshold. The eighth control module is used when the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than a second temperature threshold. When the current motor power is greater than or equal to the first power threshold and less than the second power threshold, the speed of the first fan and the second fan is adjusted to a third preset speed, the third preset speed being greater than the first preset speed, and the second temperature threshold being greater than the first temperature threshold; the ninth control module is used to adjust the speed of the first fan and the second fan to a second preset speed and adjust the opening of the solenoid valve to a preset opening when the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the second preset speed being greater than the first preset speed and the second preset speed being less than the third preset speed.

[0075] In some embodiments of this application, the device further includes a generation unit, which is used to generate alarm information when the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold. The alarm information is used to remind staff to stop the vehicle and check for malfunctions.

[0076] In some embodiments of this application, the acquisition unit includes an acquisition module and a determination module. The acquisition module is used to acquire the torque of the traction motor at the current moment to obtain the current torque. The determination module is used to determine the current motor power based on the torque conversion coefficient and the current torque. The torque conversion coefficient is the conversion coefficient between the current torque and the current motor power.

[0077] The control device of the aforementioned vehicle drive system includes a processor and a memory. The acquisition unit and control unit, etc., are all stored as program units in the memory, and the processor executes these program units stored in the memory to achieve the corresponding functions. All of the above modules reside in the same processor; alternatively, the various modules may be located in different processors in any combination.

[0078] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured. By adjusting kernel parameters, the problem of poor heat dissipation in the vehicle's drive system, which is often addressed by simply installing fans to cool the traction motor, can be solved.

[0079] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0080] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the control method of the vehicle drive system.

[0081] This invention provides a processor for running a program, wherein the program executes the control method of the vehicle drive system.

[0082] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps: acquiring the temperature and power of the traction motor at the current moment to obtain the current motor temperature and current motor power; and adjusting the speeds of at least the first fan and the second fan based on the current motor temperature and / or the current motor power to simultaneously cool the generator, the converter, and the traction motor. The device described herein may be a server, PC, PAD, mobile phone, etc.

[0083] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps: obtaining the temperature and power of the traction motor at the current moment, and obtaining the current motor temperature and current motor power; adjusting the speed of at least the first fan and the second fan according to the current motor temperature and / or the current motor power, so as to simultaneously cool down the generator, the converter and the traction motor.

[0084] This application also provides an electronic device, including a memory and a processor. The memory stores a computer program, and the processor is configured to execute any of the aforementioned vehicle drive system control methods through the computer program. Two types of fans are provided: one fan directly draws air to the generator to cool it, and the other fan draws air to the inverter first and then to the traction motor. Simultaneously, based on the current motor temperature and / or the current motor power, the speeds of at least the first and second fans are adjusted to simultaneously cool the generator, inverter, and traction motor, thereby improving the heat dissipation efficiency of the vehicle drive system. This solves the problem that existing solutions only cool the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system.

[0085] This application also provides a vehicle drive system, which includes a controller, a generator, a converter, a first fan, a second fan, a traction motor, and a solenoid valve. The traction motor, the first fan, the second fan, and the solenoid valve communicate with the controller. The generator is electrically connected to the input terminal of the converter, and the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator through a first duct. The input terminal of the second fan is connected to a second duct and a fourth duct. The converter is located inside the second duct. The solenoid valve is installed inside the fourth duct. The output terminal of the second fan is connected to the traction motor through a third duct. The controller is used to execute any of the control methods of the vehicle drive system described above.

[0086] The number of the first fan, the second fan, and the traction motor can all be multiple.

[0087] The connection relationships between the generator, converter, first fan, second fan, and traction motor are as follows: Figure 4 As shown in the diagram, the first fan's blowing principle is as follows: Figure 5 As shown, the first fan draws air from the outside and blows it directly onto the generator to cool it down. The schematic diagram of the second fan's airflow principle is shown below. Figure 6 As shown (the fourth and second air ducts form a Y-shaped air duct structure), the second fan draws air from the outside, first passing it through the inverter to cool it down, and then blows the cooled air to the traction motor to cool it down. When the solenoid valve is open, the fourth air duct also receives air (due to the second fan's suction). The air from the fourth air duct cools the air from the inverter and then cools the traction motor, thus reducing the temperature of the air blown to the traction motor and improving cooling efficiency.

[0088] Two types of fans are installed. One fan directly draws air in and blows it onto the generator to cool it down. The other fan draws air in and blows it onto the inverter first, then onto the traction motor. At the same time, based on the current motor temperature and / or the current motor power, the speeds of at least the first and second fans are adjusted to simultaneously cool the generator, inverter, and traction motor. This improves the heat dissipation efficiency of the vehicle drive system and solves the problem that existing solutions only cool the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system.

[0089] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0090] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0092] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0093] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0094] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0095] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0096] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0097] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0098] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0099] 1) The control method for the vehicle drive system of this application sets up two types of fans. One fan directly draws air to blow on the generator to cool it down, and the other fan draws air to blow on the inverter first and then on the traction motor. At the same time, based on the current motor temperature and / or the current motor power, the speed of the first fan and the second fan is adjusted to achieve the purpose of cooling the generator, the inverter and the traction motor simultaneously. This improves the heat dissipation efficiency of the vehicle drive system and solves the problem that the existing solution only cools the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system.

[0100] 2) The control device for the vehicle drive system of this application is equipped with two types of fans. One fan directly draws air to the generator to cool it down, while the other fan draws air to the inverter first and then to the traction motor. At the same time, based on the current motor temperature and / or the current motor power, the speed of the first fan and the second fan is adjusted to achieve the purpose of cooling the generator, the inverter and the traction motor simultaneously. This improves the heat dissipation efficiency of the vehicle drive system and solves the problem that the existing solution only cools the traction motor by installing fans, resulting in poor heat dissipation of the vehicle drive system.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method for a vehicle drive system, applied to a controller in the vehicle drive system, the vehicle drive system further comprising a generator, a converter, a first fan, a second fan, and a traction motor, wherein the traction motor, the first fan, and the second fan communicate with the controller, the generator is electrically connected to the input terminal of the converter, the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor, the first fan is connected to the generator via a first duct, the input terminal of the second fan is connected to a second duct, the converter is located inside the second duct, and the output terminal of the second fan is connected to the traction motor via a third duct, characterized in that... include: Obtain the temperature and power of the traction motor at the current moment to get the current motor temperature and current motor power; Based on the current motor temperature and / or the current motor power, at least the speeds of the first fan and the second fan are adjusted to simultaneously cool the generator, the converter, and the traction motor; The vehicle drive system also includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. Based on the current motor temperature and the current motor power, the speeds of the first fan and the second fan are adjusted, including: when the current motor temperature is less than a first temperature threshold and the current motor power is less than a first power threshold, adjusting the speeds of the first fan and the second fan to a first preset speed; when the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than a second temperature threshold, and... When the current motor power is greater than or equal to the first power threshold and the current motor power is less than the second power threshold, the speeds of the first and second fans are adjusted to a third preset speed, where the third preset speed is greater than the first preset speed and the second temperature threshold is greater than the first temperature threshold. When the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, the speeds of the first and second fans are adjusted to a second preset speed, and the opening of the solenoid valve is adjusted to a preset opening, where the second preset speed is greater than the first preset speed and the second preset speed is less than the third preset speed.

2. The method according to claim 1, characterized in that, Adjusting the speeds of at least the first and second fans based on the current motor temperature or the current motor power includes: If the current motor temperature is lower than the first temperature threshold, the speed of the first fan and the second fan is adjusted to the first preset speed. When the current motor temperature is greater than or equal to the first temperature threshold and the current motor temperature is less than the second temperature threshold, the speed of the first fan and the second fan is adjusted to a second preset speed, the second preset speed is greater than the first preset speed, and the second temperature threshold is greater than the first temperature threshold. If the current motor power is less than the first power threshold, the speed of the first fan and the second fan will be adjusted to the first preset speed. When the current motor power is greater than or equal to the first power threshold and the current motor power is less than the second power threshold, the speed of the first fan and the second fan is adjusted to the second preset speed.

3. The method according to claim 2, characterized in that, The vehicle drive system also includes a solenoid valve that communicates with the controller. The input terminal of the second fan is also connected to a fourth air duct. The solenoid valve is installed inside the fourth air duct. In the initial state, the opening degree of the solenoid valve is 0. Based on the current motor temperature or the current motor power, the speeds of at least the first fan and the second fan are adjusted, including: When the current motor temperature is greater than or equal to the second temperature threshold, the speed of the first fan and the second fan is adjusted to a third preset speed, and the opening of the solenoid valve is adjusted to a preset opening, wherein the third preset speed is greater than the second preset speed; When the current motor power is greater than or equal to the second power threshold, the speed of the first fan and the second fan is adjusted to the first preset speed, and the opening of the solenoid valve is adjusted to the preset opening.

4. The method according to claim 1, characterized in that, The method further includes: If the current motor temperature is greater than or equal to the second temperature threshold and the current motor power is greater than or equal to the second power threshold, an alarm message is generated. The alarm message is used to remind staff to stop the vehicle and check for malfunctions.

5. The method according to any one of claims 1 to 4, characterized in that, Obtaining the power of the traction motor at the current moment, and thus obtaining the current motor power, includes: Obtain the torque of the traction motor at the current moment to get the current torque; The current motor power is determined based on the torque conversion coefficient and the current rotational torque, wherein the torque conversion coefficient is the conversion coefficient between the current rotational torque and the current motor power.

6. A control device for a vehicle drive system, applied to the method according to any one of claims 1 to 5, characterized in that, include: The acquisition unit is used to acquire the temperature and power of the traction motor at the current moment, and obtain the current motor temperature and current motor power. In the initial state, the opening degree of the solenoid valve is 0. The control unit is configured to adjust the speed of at least the first fan and the second fan according to the current motor temperature and / or the current motor power, so as to simultaneously cool the generator, the converter and the traction motor.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the control method of the vehicle drive system according to any one of claims 1 to 5.

8. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the control method of the vehicle drive system according to any one of claims 1 to 5 through the computer program.

9. A vehicle drive system, characterized in that, include: The system comprises a controller, a generator, a converter, a first fan, a second fan, a traction motor, and a solenoid valve. The traction motor, the first fan, the second fan, and the solenoid valve communicate with the controller. The generator is electrically connected to the input terminal of the converter, and the output terminal of the converter is electrically connected to the first fan, the second fan, and the traction motor. The first fan is connected to the generator via a first duct. The input terminal of the second fan is connected to a second duct and a fourth duct. The converter is located inside the second duct. The solenoid valve is installed inside the fourth duct. The output terminal of the second fan is connected to the traction motor via a third duct. The controller is used to execute the control method of the vehicle drive system according to any one of claims 1 to 5.

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