Motor back-to-back test system, method and device, and master controller

Abstract

A motor back-to-back test system, method and device, and a master controller. The system comprises: a first motor system, a second motor system, a drive wheel and a master controller; the first motor system and the second motor system achieve transmission by means of the drive wheel; the master controller is configured to control the first motor system to operate in a rotational speed mode on the basis of a desired rotational speed; by means of the drive wheel, the first motor system drives the second motor system to operate in a torque mode on the basis of the desired rotational speed and a reference torque; and the master controller is further configured to test the rotational speed performance of the first motor system on the basis of the presence / absence of a fault of the first motor system during operation, and to test the torque performance of the second motor system on the basis of the presence / absence of a fault of the second motor system during operation. Using the present system can improve the test efficiency of the motor back-to-back test system.

Description

Motor pair test system, method, device and master controller Cross-reference to related applications

[0001] The present disclosure claims priority to the Chinese patent publication with publication number 202410821917.1 and publication name "Motor pair test system, method, device and master controller" filed on June 24, 2024 with the China Patent Office, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the field of automotive engineering, and in particular, to a motor pair test system, method, device and master controller. BACKGROUND

[0003] With the rapid development of the new energy vehicle industry, it is increasingly important for research institutions and production enterprises to quickly and accurately test newly developed vehicle drive motor system products.

[0004] Currently, the performance of vehicle drive motor systems is tested by a motor pair test system. In existing motor pair test systems, a generator of an accompanying motor and a drive motor of a tested motor are connected so that the generator of the accompanying motor can drive the drive motor of the tested motor to rotate, thereby completing performance testing of the drive motor of the tested motor during rotation of the drive motor of the tested motor.

[0005] However, for performance testing of a hybrid dual-motor system, the existing motor pair test method can only complete testing of one set of tested motor system in one round of testing, which is low in testing efficiency. SUMMARY

[0006] Therefore, it is necessary to provide a motor pair test system, method, device and master controller to solve the problem of low testing efficiency in existing motor pair test systems.

[0007] In a first aspect, the present disclosure provides a motor pair test system, comprising: a first motor system, a second motor system, a transmission wheel and a master controller;

[0008] The first motor system and the second motor system are transmitted by the transmission wheel;

[0009] The master controller is configured to control the first motor system to operate in a speed mode based on a desired speed;

[0010] The first motor system drives the second motor system to operate in a torque mode based on the desired speed and a reference torque through the transmission wheel;

[0011] The master controller is further configured to test the speed performance of the first motor system according to the presence of a fault in the operation of the first motor system, and test the torque performance of the second motor system according to the presence of a fault in the operation of the second motor system.

[0012] In one of the embodiments, the first motor system includes a first driving motor and a first generator; the second motor system includes a second driving motor and a second generator; the transmission wheel includes a driving transmission wheel and a power generation transmission wheel; the first driving motor and the second driving motor are connected through the driving transmission wheel; and the first generator and the second generator are connected through the power generation transmission wheel.

[0013] In one of the embodiments, the driving transmission wheel is a driving belt pulley; the power generation transmission wheel is a power generation belt pulley; the first driving motor is connected to the driving transmission wheel through a first rotating shaft; the second driving motor is connected to the driving transmission wheel through a second rotating shaft; the first generator is connected to the power generation transmission wheel through a third rotating shaft; and the second generator is connected to the power generation transmission wheel through a fourth rotating shaft.

[0014] In a second aspect, the disclosure further provides a motor drag test method, including:

[0015] sending a desired speed signal to the first motor system, and sending a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the desired torque before the actual torque of the second motor system in the operation process is lost;

[0016] controlling the first motor system to operate in a speed mode based on the desired speed, and controlling the second motor system to operate in a torque mode based on the desired speed and the reference torque;

[0017] testing the speed performance of the first motor system according to the presence of a fault in the operation of the first motor system, and testing the torque performance of the second motor system according to the presence of a fault in the operation of the second motor system.

[0018] In one of the embodiments, before the reference torque signal is sent to the second motor system, the desired torque before the actual torque of the second motor system in the operation process is lost is obtained; a compensation torque corresponding to the desired torque is determined; and the sum of the desired torque and the compensation torque is taken as the reference torque corresponding to the reference torque signal.

[0019] In one of the embodiments, determining the compensation torque corresponding to the desired torque includes: querying the loss torque corresponding to the desired torque as the compensation torque based on the mapping relationship between the reference torque and the loss torque under different working conditions.

[0020] In one of the embodiments, during the operation of the first motor system, the actual rotating speed of the first motor system is collected; the rotating speed acceleration of the first motor system at the current time is determined according to the reference rotating speed interval to which the actual rotating speed belongs; different reference rotating speed intervals correspond to different rotating speed accelerations; the rotating speed instruction is sent to the first motor system; the rotating speed instruction includes the rotating speed acceleration.

[0021] In one of the embodiments, any two reference rotating speed intervals are respectively taken as the first rotating speed interval and the second rotating speed interval; the rotating speed acceleration corresponding to the first rotating speed interval is greater than the rotating speed acceleration corresponding to the second rotating speed interval; any interval element in the first rotating speed interval is less than any interval element in the second rotating speed interval.

[0022] In a third aspect, the disclosure further provides a motor drag test device, comprising:

[0023] The sending module is configured to send the expected rotating speed signal to the first motor system and send the reference torque signal to the second motor system; the reference torque corresponding to the reference torque signal is greater than the expected torque before the actual torque during the operation of the second motor system is lost;

[0024] The control module is configured to control the first motor system to operate in the rotating speed mode based on the expected rotating speed and control the second motor system to operate in the torque mode based on the expected rotating speed and the reference torque;

[0025] The determining module is configured to test the rotating speed performance of the first motor system according to the existence of the fault during the operation of the first motor system and test the torque performance of the second motor system according to the existence of the fault during the operation of the second motor system.

[0026] In a fourth aspect, the disclosure further provides a master controller. The master controller comprises a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0027] The sending module is configured to send the expected rotating speed signal to the first motor system and send the reference torque signal to the second motor system; the reference torque corresponding to the reference torque signal is greater than the expected torque before the actual torque during the operation of the second motor system is lost;

[0028] The control module is configured to control the first motor system to operate in the rotating speed mode based on the expected rotating speed and control the second motor system to operate in the torque mode based on the expected rotating speed and the reference torque;

[0029] According to the fault existing in the running process of the first motor system, the speed performance of the first motor system is tested, and according to the fault existing in the running process of the second motor system, the torque performance of the second motor system is tested.

[0030] In a fifth aspect, the disclosure also provides a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the following steps:

[0031] The expected speed signal is sent to the first motor system, and the reference torque signal is sent to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the expected torque before the actual torque of the second motor system in the running process is lost;

[0032] The first motor system is controlled to run in the speed mode based on the expected speed, and the second motor system is controlled to run in the torque mode based on the expected speed and the reference torque;

[0033] According to the fault existing in the running process of the first motor system, the speed performance of the first motor system is tested, and according to the fault existing in the running process of the second motor system, the torque performance of the second motor system is tested.

[0034] The above motor drag test system, method, device and computer-readable storage medium, the first motor system and the second motor system are driven by the rotating wheel; the main control unit controls the first motor system to run in the speed mode based on the expected speed, and controls the first motor system to drive the second motor system to run in the torque mode based on the expected speed and the reference torque through the transmission wheel; the main control unit respectively tests the speed performance of the first motor system according to the fault existing in the running process of the first motor system, and tests the torque performance of the second motor system according to the fault existing in the running process of the second motor system. The above technical solution introduces the speed mode and the torque mode, controls the first motor system to run in the speed mode based on the expected speed, and then tests the speed performance of the first motor system, and controls the second motor system to run in the torque mode based on the reference torque and the expected speed driven by the first motor system, and then tests the torque performance of the second motor system. It can be seen that in one test process, the comprehensive test of the first motor system and the second motor system can be realized simultaneously, without separately testing different motor systems, thereby improving the test efficiency of the motor drag test system. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the following further describes the present disclosure with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present disclosure and not intended to limit the present disclosure.

[0036] FIG. 1 is a structural block diagram of a motor drag test system in an embodiment;

[0037] FIG. 2 is a structural schematic diagram of a motor drag test system in an embodiment;

[0038] FIG. 3 is a flow schematic diagram of a motor drag test method in an embodiment;

[0039] FIG. 4 is a flow schematic diagram of a torque compensation step in an embodiment;

[0040] FIG. 5 is a flow schematic diagram of a control rotational speed acceleration step in an embodiment;

[0041] FIG. 6 is a flow schematic diagram of a motor drag test method in another embodiment;

[0042] FIG. 7 is a structural block diagram of a motor drag test device in an embodiment;

[0043] FIG. 8 is an internal structural diagram of a master controller in an embodiment. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the following further describes the present disclosure with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present disclosure and not intended to limit the present disclosure.

[0045] The motor drag test method provided by the embodiments of the present disclosure can be applied to the motor drag test system shown in FIG. 1. The motor drag system includes a first motor system 110, a second motor system 120, a transmission wheel 130 and a master controller 140; the first motor system 110 and the second motor system 120 are driven through the transmission wheel 130; wherein the master controller 140 is configured to control the first motor system 110 to operate in a rotational speed mode based on a desired rotational speed; the first motor system 110 drives the second motor system 120 through the transmission wheel 130 to operate in a torque mode based on the desired rotational speed and a reference torque; the master controller 140 is further configured to test the rotational speed performance of the first motor system 110 according to the existence of a fault in the operation process of the first motor system 110, and test the torque performance of the second motor system 120 according to the existence of a fault in the operation process of the second motor system 120.

[0046] Optionally, the first motor system 110 can be understood as a motor system for testing the speed performance; the second motor system 120 can be understood as a motor system for testing the torque performance. The transmission wheel 130 can be understood as a component arranged to transmit power. Exemplarily, the transmission wheel 130 can include a belt wheel or the like. Optionally, the first motor system 110 and the second motor system 120 can each include at least one motor, and the motor in the first motor system 110 can be in driving connection with the corresponding motor in the second motor system 120 through the transmission wheel 130. Further, when the first motor system 110 operates in the speed mode, power can be transmitted to the second motor system 120 through the transmission wheel 130 to drive the second motor system 120 to operate in the torque mode. Optionally, the speed mode can be understood as a mode in which the motor rotates through the motor shaft to output power; the torque mode can be understood as a mode in which the motor shaft of the motor is driven to rotate and output torque. Further, the expected speed can be understood as the speed of the motor shaft of the motor system required to be reached during actual operation; the reference torque can be understood as the torque required to be output by the motor during actual operation.

[0047] In the method, the first motor system 110 and the second motor system 120 are each in communication connection with the main controller 140. Optionally, the main controller 140 can send control signals to the first motor system 110 and the second motor system 120 respectively to control the first motor system 110 to operate in the speed mode based on the expected speed. The first motor system 110 transmits power to the second motor system 120 through the transmission wheel 130, and then controls the second motor system 120 to operate in the torque mode based on the expected speed and the reference torque. The control signals can include at least one of a mode control signal, a speed control signal, and a torque control signal. Exemplarily, the mode control signal can be understood as a control signal arranged to control the first motor system 110 to enter the speed mode, and arranged to control the second motor system 120 to enter the torque mode; the speed control signal can be understood as a control signal arranged to control the speed and the speed acceleration of the first motor system 110 and the second motor system 120 driven by the first motor system 110; the torque control signal can be understood as a control signal arranged to control the torque output by the second motor system 120. Further, during actual operation of the first motor system 110 and the second motor system 120, the main controller 140 determines whether the first motor system 110 and the second motor system 120 pass the test according to the fault existence of the first motor system 110 and the second motor system 120.

[0048] It should be noted that the first motor system 110 and the second motor system 120 are dynamically determined according to the mode control signal sent by the host controller 140, that is, the motor system in the motor pair drag test system set in the speed mode is taken as the first motor system 110, and the motor system in the motor pair drag test system set in the torque mode is taken as the second motor system 120. For example, if the two sets of motor systems in the motor pair drag system are motor system A and motor system B respectively, when the host controller 140 sends the motor system A a speed mode signal and the motor system B a torque mode signal, the motor system A is the first motor system 110 and the motor system B is the second motor system 120. Conversely, when the host controller 140 sends the motor system A a torque mode signal and the motor system B a speed mode signal, the motor system A is the second motor system 120 and the motor system B is the first motor system 110. Therefore, in a round of motor pair drag test, the host controller 140 can first control the motor system A as the first motor system 110 and the motor system B as the second motor system 120, so that the motor system A operates in the speed mode based on the expected speed and the motor system B operates in the torque mode based on the expected speed and the reference torque. Further, the host controller 140 can test the speed performance of the motor system A and the torque performance of the motor system B according to the existence of faults of the motor system A and the motor system B. After a preset test time, the host controller 140 can control the motor system B as the first motor system 110 and the motor system A as the second motor system 120, so that the motor system B operates in the speed mode based on the expected speed and the motor system A operates in the torque mode based on the expected speed and the reference torque. In the above case, the host controller 140 can test the speed performance of the motor system B and the torque performance of the motor system A according to the existence of faults of the motor system A and the motor system B. It should be noted that the preset test time can be set by the technician according to the need or experience, or determined through a large number of tests, and the present disclosure does not make any limitation thereto.

[0049] It should be emphasized that the embodiments provided by the present disclosure are only taken as an example of two sets of motor systems in the motor pair drag system to illustrate the working principle of the motor pair drag system, and should not be understood as a limitation on the specific number of motor systems contained in the motor pair drag system. In the specific implementation process, the number of motor systems can be at least three.

[0050] In the embodiment, the first motor system 110 and the second motor system 120 are driven by the transmission wheel; the main controller 140 controls the first motor system 110 to operate in the speed mode based on the expected speed, and controls the first motor system 110 to drive the second motor system 120 through the transmission wheel 130 to operate in the torque mode based on the expected speed and the reference torque; the main controller 140 respectively tests the speed performance of the first motor system 110 according to the fault existing condition of the first motor system 110 in the operation process, and tests the torque performance of the second motor system 120 according to the fault existing condition of the second motor system 120 in the operation process. The above technical scheme introduces the speed mode and the torque mode, controls the first motor system 110 to operate in the speed mode based on the expected speed, and then tests the speed performance of the first motor system 110, and controls the second motor system 120 to operate in the torque mode based on the reference torque and the expected speed driven by the first motor system 110, and then tests the torque performance of the second motor system 120. It can be seen that in one test process, the comprehensive test of the first motor system 110 and the second motor system 120 can be realized synchronously, and it is not necessary to separately develop the test for different motor systems, thereby improving the test efficiency of the motor pair test system.

[0051] In an optional embodiment, the structure of the motor pair test system can be as shown in FIG. 2. Wherein, the first motor system 210 includes a first driving motor TM1 and a first generator GM1; the second motor system 220 includes a second driving motor TM2 and a second generator GM2; the transmission wheel includes a driving transmission wheel 230 and a power generation transmission wheel 240; the first driving motor TM1 and the second driving motor TM2 are driven through the driving transmission wheel 230; the first generator GM1 and the second generator GM2 are driven through the power generation transmission wheel 240.

[0052] Wherein, the driving transmission wheel 230 can be understood as a transmission wheel for transmitting power between driving motors, and the power generation transmission wheel 240 can be understood as a transmission wheel for transmitting power between generators. It should be noted that the operation mode of the first driving motor TM1 and the first generator GM1 is the same as that of the first motor system 210, and the operation mode of the second driving motor TM2 and the second generator GM2 is the same as that of the second motor system 220.

[0053] In an optional embodiment, in the motor pair test system shown in FIG. 2, the driving transmission wheel 230 is a driving belt wheel, and the power generation transmission wheel 240 is a power generation belt wheel. The first driving motor TM1 is connected with the driving transmission wheel 230 through a first rotating shaft 250, and the second driving motor TM2 is connected with the driving transmission wheel 230 through a second rotating shaft 260; the first generator GM1 is connected with the power generation transmission wheel 240 through a third rotating shaft 270, and the second generator GM2 is connected with the power generation transmission wheel 240 through a fourth rotating shaft 280.

[0054] When the first driving motor TM1 operates in the speed mode based on the expected speed, the power can be transmitted to the second driving motor TM2 through the driving transmission wheel 230, so that the second driving motor TM2 operates in the torque mode based on the expected speed and the reference torque. When the first generator GM1 operates in the speed mode based on the expected speed, the power can be transmitted to the second generator GM2 through the power generation transmission wheel 240, so that the second generator GM2 operates in the torque mode based on the expected speed and the reference torque. Further, the main controller can switch the motor system corresponding to the first motor system 210 and the second motor system 220 according to the dynamic determination principle of the first motor system and the second motor system described above, and determine whether the first driving motor TM1, the second driving motor TM2, the first generator GM1 and the second generator GM2 pass the test according to the fault existence of the first driving motor TM1, the second driving motor TM2, the first generator GM1 and the second generator GM2.

[0055] In the embodiment, the first motor system 210 includes the first driving motor TM1 and the first generator GM1; the second motor system 220 includes the second driving motor TM2 and the second generator GM2; the transmission wheel includes the driving transmission wheel 230 and the power generation transmission wheel 240; the first driving motor TM1 and the second driving motor TM2 are in transmission through the driving transmission wheel 230; the first generator GM1 and the second generator GM2 are in transmission through the power generation transmission wheel 240. The above technical solution can make the corresponding motors of the two sets of double motor systems in transmission through the transmission wheel, thereby improving the applicability of the motor pair test system in the double motor system pair test.

[0056] In one embodiment, as shown in FIG. 3, a motor pair test method is provided, and the embodiment takes the main controller applied to the motor pair test system shown in FIG. 2 as an example. In the embodiment, the method includes the following steps:

[0057] S310, sending an expected speed signal to the first motor system, and sending a reference torque signal to the second motor system.

[0058] The expected speed signal can be understood as a control signal carrying the expected speed, and the reference torque signal can be understood as a control signal carrying the reference torque.

[0059] Exemplarily, the loss torque of the second motor system in the running process can be compensated in the reference torque signal, so that the actual torque of the second motor system in the running process reaches the expected torque. Therefore, the reference torque corresponding to the reference torque signal is usually greater than the expected torque before the loss of the actual torque of the second motor system in the running process. The actual torque can be understood as the remaining torque of the second motor system in the running process after the loss of the torque.

[0060] S320, control the first motor system to run in the speed mode based on the expected speed, and control the second motor system to run in the torque mode based on the expected speed and the reference torque.

[0061] Exemplarily, when the first motor system is powered on, the speed of the first rotating shaft of the first drive motor will gradually increase until the expected speed is reached. During the above speed increasing process, the first rotating shaft of the first drive motor will drive the transmission wheel to rotate. Further, the transmission wheel will transmit power to the second rotating shaft of the second drive motor, thereby driving the second rotating shaft to rotate, so that the speed of the second rotating shaft also gradually increases to the expected speed. Moreover, the second rotating shaft will also output torque to the belt pulley during rotation, and the output torque is equal to the reference torque.

[0062] Optionally, during the speed increasing process of the first motor system and the second motor system, if the speed increases too fast, the transmission wheel is prone to slip due to insufficient friction. The motor in the motor system is connected to the transmission wheel through the rotating shaft. Once the transmission wheel slips, the motor will lose control, thereby causing the problem that the motor drag test cannot be completed. Further, the speed of the first motor system and the second motor system can be monitored, and the speed acceleration of the first motor system and the second motor system is gradually reduced according to the current speed of the first motor system and the second motor system, thereby avoiding the situation that the transmission wheel slips due to the too fast speed increase of the motor, and further ensuring the reliability and safety of the motor drag test.

[0063] S330, according to the existence of the fault of the first motor system in the running process, test the speed performance of the first motor system, and according to the existence of the fault of the second motor system in the running process, test the torque performance of the second motor system.

[0064] Optionally, the first motor system operates in the speed mode based on the expected speed, and the second motor system operates in the torque mode based on the expected speed and the reference torque, which represents that the operation of the first motor system and the second motor system meets the expected working condition. In the expected working condition, the speed performance of the first motor system and the torque performance of the second motor system can be fully tested. If the master controller does not obtain the fault signal of the first motor system and the second motor system after the preset test time, it represents that the speed performance of the first motor system and the torque performance of the second motor system pass the test in the working condition.

[0065] In the embodiment, the first motor system is controlled to operate in the speed mode based on the expected speed by sending the expected speed signal to the first motor system, and the second motor system is controlled to operate in the torque mode based on the expected speed and the reference torque by sending the reference torque signal to the second motor system. Whether the first motor system and the second motor system pass the test is determined according to the fault existence of the first motor system and the second motor system in the operation process. The above technical solution can make the operation of the first motor system and the second motor system meet the expected working condition in the motor drag test, so as to fully test the speed performance of the first motor system and the torque performance of the second motor system. Further, whether the first motor system and the second motor system pass the test is determined according to the fault of the first motor system and the second motor system, which improves the reliability and accuracy of the motor drag test.

[0066] On the basis of the technical solutions of the above embodiments, the present disclosure further provides an optional embodiment, in which the torque compensation step is refined.

[0067] Referring to the torque compensation step shown in FIG. 4, the torque compensation step includes:

[0068] S410, obtaining the expected torque before the actual torque of the second motor system in the operation process is obtained.

[0069] Optionally, since the first motor system transmits power to the second motor system through the transmission wheel, and then drives the second motor system to rotate, in this process, the second motor system will transmit a reaction force to the first motor system, according to the reaction force, the actual torque of the second motor system in the running process can be further calculated. However, the transmission wheel will generate friction during rotation, and the reaction force will be lost in the process of offsetting the friction, thereby causing the torque output by the second motor system to be lost. Therefore, if the expected torque signal is directly sent to the second motor system, the actual torque of the second motor system in the running process will usually be less than the expected torque. In order to make the second motor system run based on the expected torque, it is necessary to send a reference torque signal to the second motor system, and set the reference torque carried in the signal to be greater than the expected torque, so as to compensate for the torque lost by the second motor system in the running process.

[0070] S420, determine the compensation torque corresponding to the expected torque.

[0071] Wherein, the compensation torque can be understood as the compensation value of the torque lost by the second motor system in the running process. The compensation torque should not be less than the loss torque of the second motor system in the running process.

[0072] In an optional embodiment, the loss torque corresponding to the expected torque can be queried as the compensation torque based on the mapping relationship between the reference torque and the loss torque under different working conditions. For example, a large number of preliminary tests can be carried out before the motor pair test to master the loss torque of the second motor system in the running process under different working conditions, so as to determine the mapping relationship between the reference torque and the loss torque. For example: in a certain working condition, the reference torque signal with a reference torque of 10 N / m is sent to the second motor system. If the actual torque of the second motor system in the running process is measured to be 8 N / m, it is determined that the corresponding loss torque of the second motor system when the reference torque is 10 N / m is 2 N / m. Further, if the expected torque that the second motor system needs to reach in the motor pair test is 10 N / m, the corresponding loss torque when the reference torque is 10 N / m can be directly obtained as the compensation torque, that is, 2 N / m.

[0073] S430, the sum of the expected torque and the compensation torque is taken as the reference torque corresponding to the reference torque signal.

[0074] Optionally, in order to make the actual torque of the second motor system reach the expected torque in the motor pair test, the loss torque of the second motor system needs to be compensated in the reference torque signal.

[0075] For example, in a certain determined working condition, if the expected torque is 20 N / m, the compensation torque corresponding to the expected torque is 5 N / m, in the corresponding working condition of the motor drag test, a reference torque signal of 25 N / m can be sent to the second motor system to make the actual torque of the second motor system reach 20 N / m.

[0076] In the embodiment, the expected torque of the actual torque of the second motor system in the running process before the loss is obtained; the compensation torque corresponding to the expected torque is determined; and the sum of the expected torque and the compensation torque is taken as the reference torque corresponding to the reference torque signal. The above technical scheme performs a thorough test before the motor drag test, and determines the compensation torque required to make the second motor system reach the expected torque in different working conditions. Correspondingly, in the corresponding working condition of the motor drag test, the loss torque that will occur in the test process of the second motor system is offset by providing the compensation torque to the second motor system, so that the output torque of the second motor system can reach the expected torque, thereby ensuring that the torque performance of the second motor system is fully tested, and the reliability of the motor drag test and the accuracy of the motor drag test result are improved.

[0077] On the basis of the technical solutions of the above embodiments, the present disclosure further provides an optional embodiment, in which the step of controlling the acceleration of the speed is refined.

[0078] Referring to the step of controlling the acceleration of the speed shown in FIG. 5, the step includes:

[0079] S510, in the running process of the first motor system, the actual speed of the first motor system is collected.

[0080] Optionally, in the running process of the first motor system, the actual speed of the first motor system can be detected in real time or at a fixed time by a speed sensor.

[0081] S520, according to the reference speed interval to which the actual speed belongs, the speed acceleration of the first motor system at the current time is determined.

[0082] The reference speed interval can be understood as a speed interval set to determine the speed acceleration corresponding to the actual speed of the first motor system. Optionally, the speed acceleration corresponding to different reference speed intervals is different.

[0083] In an optional embodiment, the allowed speed range of the motor rotation process can be divided into at least two reference speed ranges according to actual needs. For example, any two reference speed ranges can be taken as a first speed range and a second speed range respectively; the speed acceleration corresponding to the first speed range is greater than the speed acceleration corresponding to the second speed range; any interval element in the first speed range is less than any interval element in the second speed range. Alternatively, for example, the allowed speed range [0, 3000] can be divided into three reference speed ranges, which are a first speed range, a second speed range and a third speed range respectively. Further, the first speed range is [0, 1000], the second speed range is (1000, 2000], and the third speed range is (2000, 3000]. The speed acceleration corresponding to the first speed range is 100 r / s 2 , the speed acceleration corresponding to the second speed range is 50 r / s 2 , and the speed acceleration corresponding to the third speed range is 30 r / s 2 . Accordingly, if the actual speed of the first motor system is 1500 r / s, the actual speed belongs to the second speed range, and the speed acceleration of the first motor system is 50 r / s 2 .

[0084] It should be noted that only three reference speed ranges are taken as an example in the embodiment to illustrate the control principle of the speed acceleration of the first motor system. The reference speed range can be at least three.

[0085] S530, a speed instruction is sent to the first motor system.

[0086] The speed instruction can be understood as an instruction for controlling the speed acceleration of the first motor system, and the speed instruction carries the speed acceleration. For example, if it is determined that the speed acceleration of the first motor system is 30 r / s 2 , a speed instruction carrying a speed acceleration value of 30 r / s 2 can be sent to the first motor system, so as to control the speed of the first motor system to increase the speed at an acceleration of 30 r / s 2 .

[0087] It should be emphasized that the above method of controlling the speed acceleration is not only applicable to the first motor system, but also applicable to the second speed system. For reference to the above steps of controlling the speed acceleration of the first motor system, details are not repeated here.

[0088] In the embodiment, the actual rotating speed of the first motor system is collected during operation of the first motor system; the rotating speed acceleration of the first motor system at the current time is determined according to the reference rotating speed interval to which the actual rotating speed belongs; the rotating speed instruction is sent to the first motor system; the rotating speed acceleration is included in the rotating speed instruction. The above technical solution pre-sets the reference rotating speed interval, and determines the rotating speed acceleration of the first motor system according to the reference rotating speed interval to which the actual rotating speed of the first motor system belongs, and sends the rotating speed signal carrying the rotating speed acceleration to the first motor system, so as to control the first motor system to increase the rotating speed based on the rotating speed acceleration, thereby avoiding the problem of transmission wheel slipping caused by too fast increase of the rotating speed of the first motor system, and ensuring the reliability and safety of the motor drag test.

[0089] On the basis of the technical solutions of the above embodiments, the present disclosure further provides an optional embodiment, in which the motor drag test method is described in detail.

[0090] Referring to a motor drag test method shown in FIG. 6, the method comprises:

[0091] S601, obtaining the expected torque before loss of the actual torque of the second motor system during operation.

[0092] S602, querying the loss torque corresponding to the expected torque as the compensation torque based on the mapping relationship between the reference torque and the loss torque under different working conditions.

[0093] S603, taking the sum of the expected torque and the compensation torque as the reference torque corresponding to the reference torque signal.

[0094] S604, sending the expected rotating speed signal to the first motor system, and sending the reference torque signal to the second motor system.

[0095] S605, collecting the actual rotating speed of the first motor system during operation of the first motor system.

[0096] S606, determining the rotating speed acceleration of the first motor system at the current time according to the reference rotating speed interval to which the actual rotating speed belongs.

[0097] S607, sending the rotating speed instruction to the first motor system.

[0098] S608, controlling the first motor system to operate in the rotating speed mode based on the expected rotating speed, and controlling the second motor system to operate in the torque mode based on the expected rotating speed and the reference torque.

[0099] S609, test the speed performance of the first motor system according to the existence of the fault in the running process of the first motor system, and test the torque performance of the second motor system according to the existence of the fault in the running process of the second motor system.

[0100] It should be understood that, although each step in the flowchart involved in each embodiment as described above is shown in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or steps or stages in other steps.

[0101] Based on the same inventive concept, the embodiments of the present disclosure also provide a motor drag test device configured to implement the motor drag test method described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more motor drag test device embodiments provided below can refer to the limitations of the motor drag test method described above, and will not be repeated here.

[0102] In one exemplary embodiment, as shown in FIG. 7, a motor drag test device is provided, comprising: a sending module 710, a control module 720 and a determination module 730, wherein:

[0103] The sending module 710 is configured to send a desired speed signal to the first motor system, and send a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the desired torque before the actual torque of the second motor system in the running process is lost.

[0104] The control module 720 is configured to control the first motor system to run in speed mode based on the desired speed, and control the second motor system to run in torque mode based on the desired speed and the reference torque.

[0105] The determination module 730 is configured to test the speed performance of the first motor system according to the existence of the fault in the running process of the first motor system, and test the torque performance of the second motor system according to the existence of the fault in the running process of the second motor system.

[0106] In one of the embodiments, the sending module 710 comprises: a first acquisition unit configured to acquire an actual torque of the second motor system during operation of the second motor system before the loss of the expected torque; a first determination unit configured to determine a compensation torque corresponding to the expected torque; and a second determination unit configured to take a sum of the expected torque and the compensation torque as a reference torque corresponding to the reference torque signal.

[0107] In one of the embodiments, the first determination unit comprises: a first query sub-unit configured to query a loss torque corresponding to the expected torque as the compensation torque based on a mapping relationship between the reference torque and the loss torque under different working conditions.

[0108] In one of the embodiments, the control module 720 comprises: a first acquisition unit configured to acquire an actual speed of the first motor system during operation of the first motor system; a third determination unit configured to determine a speed acceleration of the first motor system at the current time according to a reference speed interval to which the actual speed belongs; and a first sending unit configured to send a speed instruction to the first motor system.

[0109] In one of the embodiments, the third determination unit comprises: a first division sub-unit configured to take any two reference speed intervals as a first speed interval and a second speed interval respectively; wherein the speed acceleration corresponding to the first speed interval is greater than the speed acceleration corresponding to the second speed interval; and any interval element in the first speed interval is less than any interval element in the second speed interval.

[0110] The above-mentioned modules in the motor drag test device can be realized by software, hardware, and combinations thereof, in whole or in part. The above-mentioned modules can be embedded in or independent of the processor in the main controller in hardware form, or can be stored in the memory in the main controller in software form, so as to be called and executed by the processor to perform the operations corresponding to the above-mentioned modules.

[0111] In an example embodiment, a master controller is provided, and an internal structure diagram of the master controller can be as shown in FIG. 8. The master controller includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the master controller is configured to provide computing and control capabilities. The memory of the master controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the master controller is configured to exchange information between the processor and external devices. The communication interface of the master controller is configured to communicate with external terminals in a wired or wireless manner. The wireless manner can be achieved through WIFI, mobile cellular network, near field communication (NFC), or other technologies. The computer program is executed by the processor to implement a motor drag test method. The display unit of the master controller is configured to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the master controller can be a touch layer overlaid on the display screen, or a key, trackball, or touchpad arranged on the shell of the master controller, or an external keyboard, touchpad, or mouse, etc.

[0112] Those skilled in the art can understand that the structure shown in FIG. 8 is only a block diagram of part of the structure related to the present disclosure, and does not constitute a limitation on the master controller to which the present disclosure is applied. A specific master controller can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0113] In an example embodiment, a master controller is provided, including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the following steps:

[0114] sending a desired speed signal to the first motor system, and sending a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the desired torque before the actual torque of the second motor system during operation is lost;

[0115] controlling the first motor system to operate in speed mode based on the desired speed, and controlling the second motor system to operate in torque mode based on the desired speed and the reference torque;

[0116] According to the fault existing condition of the first motor system in the running process, the speed performance of the first motor system is tested, and according to the fault existing condition of the second motor system in the running process, the torque performance of the second motor system is tested.

[0117] In one embodiment, when the processor executes the computer program, the following steps are also implemented: before sending the reference torque signal to the second motor system, obtaining the expected torque before loss of the actual torque of the second motor system in the running process; determining the compensation torque corresponding to the expected torque; and taking the sum of the expected torque and the compensation torque as the reference torque corresponding to the reference torque signal.

[0118] In one embodiment, when the processor executes the computer program, the following steps are also implemented: based on the mapping relationship between the reference torque and the loss torque under different working conditions, the loss torque corresponding to the expected torque is queried as the compensation torque.

[0119] In one embodiment, when the processor executes the computer program, the following steps are also implemented: during the running process of the first motor system, the actual speed of the first motor system is collected; according to the reference speed interval to which the actual speed belongs, the speed acceleration of the first motor system at the current time is determined; wherein the speed acceleration corresponding to different reference speed intervals is different; a speed instruction is sent to the first motor system; the speed instruction includes the speed acceleration.

[0120] In one embodiment, when the processor executes the computer program, the following steps are also implemented: any two reference speed intervals are taken as a first speed interval and a second speed interval respectively; wherein the speed acceleration corresponding to the first speed interval is greater than the speed acceleration corresponding to the second speed interval; any interval element in the first speed interval is less than any interval element in the second speed interval.

[0121] In one embodiment, a computer readable storage medium is provided, and the computer readable storage medium has a computer program stored thereon, and the computer program is executed by a processor to implement the following steps:

[0122] sending an expected speed signal to the first motor system and sending a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the expected torque before loss of the actual torque of the second motor system in the running process;

[0123] controlling the first motor system to run in the speed mode based on the expected speed, and controlling the second motor system to run in the torque mode based on the expected speed and the reference torque;

[0124] According to the fault existing condition of the first motor system in the running process, the rotation speed performance of the first motor system is tested, and according to the fault existing condition of the second motor system in the running process, the torque performance of the second motor system is tested.

[0125] In one embodiment, the computer program is executed by the processor to further implement the following steps: before sending the reference torque signal to the second motor system, obtaining the expected torque before the loss in the running process of the second motor system; determining the compensation torque corresponding to the expected torque; and taking the sum of the expected torque and the compensation torque as the reference torque corresponding to the reference torque signal.

[0126] In one embodiment, the computer program is executed by the processor to further implement the following steps: determining the compensation torque corresponding to the expected torque, including: based on the mapping relationship between the reference torque and the loss torque under different working conditions, querying the loss torque corresponding to the expected torque as the compensation torque.

[0127] In one embodiment, the computer program is executed by the processor to further implement the following steps: collecting the actual rotation speed of the first motor system in the running process of the first motor system; determining the rotation speed acceleration of the first motor system at the current time according to the reference rotation speed interval to which the actual rotation speed belongs; wherein the rotation speed acceleration corresponding to different reference rotation speed intervals is different; sending the rotation speed instruction to the first motor system; the rotation speed instruction includes the rotation speed acceleration.

[0128] In one embodiment, the computer program is executed by the processor to further implement the following steps: taking any two reference rotation speed intervals as a first rotation speed interval and a second rotation speed interval respectively; wherein the rotation speed acceleration corresponding to the first rotation speed interval is greater than the rotation speed acceleration corresponding to the second rotation speed interval; any interval element in the first rotation speed interval is less than any interval element in the second rotation speed interval.

[0129] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in each embodiment provided by the present disclosure can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in each embodiment provided by the present disclosure can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in each embodiment provided by the present disclosure can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0130] Each technical feature of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of each technical feature in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the range disclosed by the present disclosure.

[0131] The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent of the present disclosure. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims. Industrial applicability

[0132] The present disclosure controls the first motor system to operate based on the expected speed in the speed mode, thereby testing the speed performance of the first motor system, and controls the second motor system to operate based on the reference torque and the expected speed transmitted from the first motor system in the torque mode, thereby testing the torque performance of the second motor system, by introducing the speed mode and the torque mode. It can be seen that in one test process, the comprehensive test of the first motor system and the second motor system can be simultaneously realized, without separately carrying out the test for different motor systems, thereby improving the test efficiency of the motor test system.

Claims

1. An electric machine motoring test system, comprising: The first motor system, the second motor system, the transmission wheel and the master controller; The first motor system and the second motor system are in transmission through the transmission wheel; The master controller is configured to control the first motor system to operate in a speed mode based on a desired speed; The first motor system drives the second motor system to operate in a torque mode based on the desired speed and a reference torque through the transmission wheel; The master controller is further configured to test the speed performance of the first motor system according to the existence of a fault in the operation of the first motor system, and test the torque performance of the second motor system according to the existence of a fault in the operation of the second motor system.

2. The system of claim 1, wherein, The first motor system includes a first driving motor and a first generator; the second motor system includes a second driving motor and a second generator; the transmission wheel includes a driving transmission wheel and a power generation transmission wheel; The first driving motor and the second driving motor are in transmission through the driving transmission wheel; the first generator and the second generator are in transmission through the power generation transmission wheel.

3. The system of claim 2, wherein, The driving transmission wheel is a driving belt pulley; the power generation transmission wheel is a power generation belt pulley; The first driving motor is connected with the driving transmission wheel through a first rotating shaft, and the second driving motor is connected with the driving transmission wheel through a second rotating shaft; The first generator is connected with the power generation transmission wheel through a third rotating shaft, and the second generator is connected with the power generation transmission wheel through a fourth rotating shaft.

4. A motor pair test method applied to the master controller of any one of claims 1-3, comprising: sending a desired speed signal to the first motor system, and sending a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the desired torque before loss of the actual torque in the operation process of the second motor system; controlling the first motor system to operate in a speed mode based on a desired speed, and controlling the second motor system to operate in a torque mode based on the desired speed and a reference torque; testing the speed performance of the first motor system according to the existence of a fault in the operation of the first motor system, and testing the torque performance of the second motor system according to the existence of a fault in the operation of the second motor system.

5. The method of claim 4, wherein, Before sending the reference torque signal to the second motor system, the method further comprises: obtaining the desired torque before loss of the actual torque in the operation process of the second motor system; determining a compensation torque corresponding to the desired torque; taking the sum of the desired torque and the compensation torque as the reference torque corresponding to the reference torque signal.

6. The method of claim 5, wherein, The determination of the compensation torque corresponding to the desired torque comprises: querying the loss torque corresponding to the desired torque as the compensation torque based on the mapping relationship between each reference torque and loss torque under different working conditions.

7. The method according to any one of claims 4 to 6, wherein, The method further comprises: collecting the actual speed of the first motor system in the operation process of the first motor system; determining a speed acceleration of the first motor system at the current time according to a reference speed interval to which the actual speed belongs; wherein the speed acceleration corresponding to different reference speed intervals is different; sending a speed instruction to the first motor system; the speed instruction comprising the speed acceleration.

8. The method of claim 7, wherein, respectively taking any two reference speed intervals as a first speed interval and a second speed interval; wherein the speed acceleration corresponding to the first speed interval is greater than the speed acceleration corresponding to the second speed interval; and any interval element in the first speed interval is less than any interval element in the second speed interval.

9. A motor pair drag test device, the device comprising: a sending module configured to send a desired speed signal to the first motor system and a reference torque signal to the second motor system; wherein the reference torque corresponding to the reference torque signal is greater than the desired torque before loss of the actual torque during operation of the second motor system; a control module configured to control the first motor system to operate in a speed mode based on the desired speed and to control the second motor system to operate in a torque mode based on the desired speed and the reference torque; a determination module configured to test the speed performance of the first motor system according to the existence of faults during operation of the first motor system and to test the torque performance of the second motor system according to the existence of faults during operation of the second motor system.

10. A master controller comprising a memory and a processor, the memory storing a computer program, and the processor implementing the steps of the method of any one of claims 4 to 8 when executing the computer program.

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