Motor testing device

Abstract

The embodiment of the utility model provides a motor testing device. The motor testing device comprises a first testing unit, a second testing unit, a cooling unit and a processing and analyzing unit. The first test unit is connected with a to-be-tested motor, and the first test unit is used for simulating a first driving wheel; the second test unit is connected with the motor to be tested, the second test unit is used for simulating a second driving wheel, and the second driving wheel is opposite to the first driving wheel in the straight moving direction of the vehicle; the cooling unit is connected with a cooling circulation component of the motor to be tested; and the processing and analyzing unit is connected with the motor to be tested and is used for performing power analysis on the motor to be tested. The embodiment of the utility model aims to solve the problem that a motor testing device cannot simulate the working state or environment of a motor on a whole vehicle perfectly.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of motor testing, and in particular to a motor testing device. BACKGROUND

[0002] The motor is an important component of a new energy vehicle (for example, an electric vehicle). It has the functions of providing power, energy recovery, speed control, etc. In the research and development or verification process, the motor of the electric vehicle needs to be tested for performance. The performance test of the motor needs to rely on an electric drive system test bench. Therefore, the electric drive system test bench test is of great significance to the research and development and performance verification of the new energy vehicle. Through the test bench test, the performance of the motor system can be measured in real time and accurately, the control parameters can be measured online, the system control strategy can be optimized, and the performance, efficiency and stability of the electric drive system under various working conditions can be evaluated comprehensively. Based on the motor test bench or the powertrain test bench, the simulation of the vehicle road cycle test working condition can be realized, thereby shortening the development and test period, reducing the development and test risk and cost, and ensuring that the entire electric drive system meets the relevant standard requirements.

[0003] However, with the increasing requirements of new energy vehicles for cruising range and efficiency, the electric drive system is developing towards integration, miniaturization and light weight, and the all-in-one electric drive system integrates the motor, the reducer, the controller, etc. The existing motor testing device is not perfect in simulating the working state or environment of the motor on the vehicle. CONTENT OF THE INVENTION

[0004] Therefore, the motor testing device aims to improve the problem that the motor testing device is not perfect in simulating the working state or environment of the motor on the vehicle.

[0005] The motor testing device provided by the embodiment of the present application comprises a first testing unit, a second testing unit, a cooling unit and a processing and analysis unit. The first testing unit is connected with a motor to be tested, and is used for simulating a first driving wheel. The second testing unit is connected with the motor to be tested, and is used for simulating a second driving wheel opposite to the first driving wheel in the straight direction of the vehicle. The cooling unit is connected with a cooling circulation component of the motor to be tested. The processing and analysis unit is connected with the motor to be tested, and is used for power analysis of the motor to be tested.

[0006] In a possible implementation manner, the first testing unit comprises a first dynamometer, a first controller and a first detection module. The first dynamometer is drivingly connected with the motor to be tested. The first controller is electrically connected with the first dynamometer and the first detection module, respectively. The first detection module is arranged around the rotating shaft of the first dynamometer.

[0007] In a possible implementation, the first detection module comprises a first rotation speed sensor and a first torque sensor.

[0008] In a possible implementation, the processing and analyzing unit comprises a power analyzer.

[0009] In a possible implementation, the processing and analyzing unit further comprises a host computer and a communication module, the host computer is in communication connection with the cooling unit, the first testing unit and the second testing unit respectively, and the host computer is in communication connection with the motor to be tested through the communication module.

[0010] In a possible implementation, the power conversion unit is in electrical connection with the processing and analyzing unit, the first testing unit, the second testing unit and the motor to be tested respectively.

[0011] In a possible implementation, the motor environment chamber is further provided, and the motor to be tested is located in the motor environment chamber.

[0012] In a possible implementation, the first torque protector and / or the second torque protector are further provided, the first torque protector is located between the motor to be tested and the first testing unit, and the second torque protector is located between the motor to be tested and the second testing unit.

[0013] In a possible implementation, the power conversion unit comprises a first power conversion module and a second power conversion module, the first power conversion module is in electrical connection with the processing and analyzing unit, and the second power conversion module is in electrical connection with the motor to be tested.

[0014] In a possible implementation, the power conversion unit further comprises a third power conversion module, the third power conversion module is in electrical connection with the first testing unit and the second testing unit respectively.

[0015] In the embodiment, the cooling unit cools the motor to be tested during the operation of the motor to be tested, so as to prevent the motor to be tested from overheating. The motor to be tested drives the first testing unit and the second testing unit, and the power of the motor to be tested is analyzed through the processing and analyzing unit, so as to obtain the working performance of the motor to be tested. In the embodiment, the first testing unit simulates the first driving wheel, and the second testing unit simulates the second driving wheel, so as to simulate the whole vehicle working environment of the motor to be tested, and thus more accurate performance analysis is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0021] Figure 5 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0022] Figure 6 A schematic diagram of a motor testing device provided by an embodiment of the present application;

[0023] Label explanation

[0024] 010, motor to be tested; 011, driving motor; 012, driving motor controller; 013, speed reducer; 100, motor testing device; 101, first tooling half shaft; 102, second tooling half shaft; 103, first flange; 104, second flange; 105, first torque protector; 106, second torque protector; 110, first testing unit; 111, first dynamometer; 1111, rotating shaft of the first dynamometer; 112, first controller; 113, first detection module; 113a, first rotating speed sensor; 113b, first torque sensor; 120, second testing unit; 121, second dynamometer; 1211, rotating shaft of the second dynamometer; 122, second controller; 123, second detection module; 123a, second rotating speed sensor; 123b, second torque sensor; 130, cooling unit; 131, water chiller; 140, processing and analyzing unit; 141, power analyzer; 142, upper computer; 143, communication module; 150, power conversion unit; 151, first power conversion module; 152, second power conversion module; 160, power distribution control unit. DETAILED DESCRIPTION

[0025] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0026] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0028] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0029] As shown in Figure 1 The motor testing device 100 provided by the embodiments of the present application includes a first test unit 110, a second test unit 120, a cooling unit 130 and a processing and analysis unit 140. The first test unit 110 is connected with the motor to be tested 010, and the first test unit 110 is used to simulate the first driving wheel. In a possible implementation, the first test unit 110 is drivingly connected with the motor to be tested 010, and the first test unit 110 acts as a load of the motor to be tested 010, so as to realize that the first test unit 110 simulates the first driving wheel. The second test unit 120 is connected with the motor to be tested 010, and the second test unit 120 is used to simulate the second driving wheel. In a possible implementation, the second test unit 120 is drivingly connected with the motor to be tested 010, and the second test unit 120 acts as a load of the motor to be tested 010, so as to realize that the second test unit 120 simulates the second driving wheel. The second driving wheel is opposite to the first driving wheel along the straight running direction of the vehicle. The straight running direction of the vehicle is parallel to the direction in which the vehicle head faces the tail. The cooling unit 130 is connected with the cooling circulating component of the motor to be tested 010. The cooling unit 130 is used to cool the motor to be tested 010, so as to prevent the motor to be tested 010 from overheating and causing inaccurate performance test. The processing and analysis unit 140 is connected with the motor to be tested 010, and the processing and analysis unit 140 is used to perform power analysis on the motor to be tested 010.

[0030] In the embodiment, the cooling unit 130 cools the motor under test 010 during the operation of the motor under test 010, to prevent the motor under test 010 from overheating. The motor under test 010 drives the first test unit 110 and the second test unit 120, and the power of the motor under test 010 is analyzed by the processing and analysis unit 140, to obtain the working performance of the motor under test 010. In the embodiment, the first test unit 110 simulates the first driving wheel, and the second test unit 120 simulates the second driving wheel, to simulate the whole vehicle working environment of the motor under test 010, to obtain more accurate performance analysis.

[0031] As shown in Figure 2 In the embodiment, the first test unit 110 includes a first dynamometer 111, a first controller 112, and a first detection module 113. The first dynamometer 111 is drivingly connected to the motor under test 010. The first controller 112 is electrically connected to the first dynamometer 111 and the first detection module 113, and is configured to control the first dynamometer 111. The first detection module 113 is arranged around the rotating shaft 1111 of the first dynamometer 111.

[0032] As shown in Figure 2 The first dynamometer 111 is connected to the motor under test 010 through the first tooling half shaft 101, and the motor under test 010 drives the first dynamometer 111 to rotate through the first tooling half shaft 101. The first detection module 113 is configured to detect the performance parameters of the first dynamometer 111. The first controller 112 sends control instructions to the first dynamometer 111, and receives detection results sent by the first detection module 113, and can adjust the control of the first dynamometer 111 based on the received detection results.

[0033] As shown in Figure 2 In a possible implementation, the first detection module 113 includes a first speed sensor 113a and a first torque sensor 113b. The first speed sensor 113a and the first torque sensor 113b are arranged around the rotating shaft 1111 of the first dynamometer 111. The first speed sensor 113a is configured to detect the speed of the first dynamometer 111. The first torque sensor 113b is configured to detect the torque of the first dynamometer 111.

[0034] The first speed sensor 113a and the first torque sensor 113b are used to detect the speed and torque of the shaft 1111 of the first dynamometer in real time, respectively, and feed back the real-time monitored speed and torque values ​​to the first controller 112 and the host computer 142 of the first dynamometer 111. The shaft 1111 of the first dynamometer and the shaft 1211 of the second dynamometer can be started simultaneously. The acceleration and deceleration rates of the two dynamometers are the same. When the host computer 142 gives the dynamometer speed command, the shaft 1111 of the first dynamometer and the shaft 1211 of the second dynamometer can start rotating at the same speed but in opposite directions.

[0035] like Figure 2 As shown, in one embodiment of this application, the second testing unit 120 includes: a rotating shaft 1211 of a second dynamometer 121, a second controller 122, and a second detection module 123. The rotating shaft 1211 of the second dynamometer is connected to the motor 010 under test via a transmission connection. The second controller 122 is electrically connected to both the rotating shaft 1211 of the second dynamometer and the second detection module 123, and is used to control the rotating shaft 1211 of the second dynamometer. The second detection module 123 is disposed around the rotating shaft 1211 of the second dynamometer.

[0036] like Figure 2 As shown, the rotating shaft 1211 of the second dynamometer is connected to the motor under test 010 via the second tooling half-shaft 102. The motor under test 010 drives the rotating shaft 1211 of the second dynamometer to rotate via the second tooling half-shaft 102. The second detection module 123 is used to detect the performance parameters of the rotating shaft 1211 of the second dynamometer. The second controller 122 sends control commands to the rotating shaft 1211 of the second dynamometer and receives the detection results sent by the second detection module 123, and can adjust the control of the rotating shaft 1211 of the second dynamometer based on the received detection results.

[0037] like Figure 2 As shown, in one possible implementation, the second detection module 123 includes a second speed sensor 123a and a second torque sensor 123b. The second speed sensor 123a and the second torque sensor 123b are respectively disposed around the shaft 1211 of the second dynamometer. The second speed sensor 123a is used to detect the rotational speed of the shaft 1211 of the second dynamometer. The second torque sensor 123b is used to detect the torque of the shaft 1211 of the second dynamometer.

[0038] The second speed sensor and the second torque sensor 123b are used to detect the rotational speed and torque of the shaft 1211 of the second dynamometer in real time, and feed back the real-time monitored rotational speed and torque values ​​to the second controller 122 and the host computer 142 of the shaft 1211 of the second dynamometer.

[0039] likeFigure 2 As shown in the embodiment of the present application, the processing and analysis unit 140 comprises a power analyzer 141.

[0040] In the embodiment, the motor to be tested 010 is electrically connected to a high-voltage bus, and a voltage and current sensor is arranged on the high-voltage bus. The voltage and current sensor is electrically connected to the power analyzer 141. The power analyzer 141 calculates the power of the motor to be tested 010 through the information collected by the voltage and current sensor, thereby performing performance analysis on the motor to be tested 010.

[0041] As shown in the embodiment of the present application, the processing and analysis unit 140 further comprises a host computer 142 and a communication module 143. The host computer 142 is communicatively connected to the cooling unit 130, the first test unit 110 and the second test unit 120. The host computer 142 is communicatively connected to the motor to be tested 010 through the communication module 143. In a possible implementation, the communication module 143 is a CAN communication module 143. Figure 2

[0042] In the embodiment, the host computer 142 sends instructions to the motor to be tested 010 through the communication module 143. After receiving the instructions from the host computer 142, the motor to be tested 010 starts to work, and the first test unit 110 and the second test unit 120 work together. The processing and analysis unit 140 performs power analysis on the motor to be tested 010, thereby obtaining the working performance of the motor to be tested 010 in the whole vehicle environment. The host computer 142 is also communicatively connected to the cooling unit 130, the first test unit 110 and the second test unit 120, thereby realizing the issuance of instructions and the monitoring of parameters by the host computer 142.

[0043] In a possible implementation, the host computer 142 is also communicatively connected to the power analyzer 141. The host computer 142 monitors and processes the analysis results of the power analyzer 141.

[0044] In combination with Figure 1 and Figure 2 In a possible implementation, the cooling unit 130 comprises a cooling machine, and the cooling machine is connected to the cooling circulation component of the motor to be tested 010 through a connecting pipe. For example, the cooling machine is a water cooling machine 131, and the water cooling machine 131 is connected to the water cooling pipe of the motor to be tested 010 through a connecting pipe.

[0045] In the embodiment of the present application, the motor test device 100 further comprises a power conversion unit 150, which is electrically connected to the processing and analysis unit 140, the first test unit 110, the second test unit 120 and the motor to be tested 010. The power conversion unit 150 is used to provide appropriate power to the processing and analysis unit 140, the first test unit 110, the second test unit 120 and the motor to be tested 010.​

[0046] Combination Figure 2 and Figure 3 In one possible implementation, the power conversion unit 150 includes a first power conversion module 151 and a second power conversion module 152. The first power conversion module 151 is electrically connected to the processing module and provides adapted power to the processing and analysis unit 140. For example, the first power conversion module 151 converts the input power into a low-voltage power supply adapted to the communication module 143 in the processing and analysis unit 140. The second power conversion module 152 is electrically connected to the motor under test 010 and provides adapted power to the motor under test 010. For example, the second power module converts the input power into a high-voltage power supply adapted to the motor under test 010, and the second power module is electrically connected to the motor under test 010 via a high-voltage bus. In one possible implementation, the second power module includes a battery simulator. The battery simulator simulates the power supply battery or power source of the motor under test 010. The battery simulator can be either an on-off type or a storage type. Among them, the "on-off" type means that when the external power source (such as mains power or industrial power) is connected, it can output the target power source, and when the external power source is disconnected, it cannot output voltage; the "storage" type means that it can store electrical energy, such as a lithium battery pack.

[0047] In one possible implementation, the power conversion unit 150 further includes a third power conversion module, which is electrically connected to both the first test unit 110 and the second test unit 120. The third power conversion module provides adapted power to both the first test unit 110 and the second test unit 120. For example, the third conversion module includes an inverter and a control module. The control module is electrically connected to the control terminal of the inverter and is used to receive first control information sent by the host computer 142 and send second control information to the inverter based on the first control information. The inverter adjusts the speed of the dynamometer based on the received second control information.

[0048] In one possible implementation, the control module includes a PID controller and a pulse modulation controller. The PID controller and the pulse modulation controller are electrically connected. Figure 4 As shown, the PID controller receives the speed command sent by the host computer and performs PID control based on the speed command. The pulse modulation controller adjusts the frequency or width-to-length ratio of the pulse based on the PID control and sends the pulse signal to the control terminal of the inverter (e.g., the control terminal of the corresponding transistor in the inverter), thereby regulating the inverter and ultimately achieving the adjustment of the speed and torque of the dynamometer, thus realizing the technical objective of simulating different loads.

[0049] In a possible implementation, the PID adjustment controller is connected with the upper computer 142 or the controller (including the first controller 112 and the second controller 122). When the PID adjustment controller is connected with the upper computer 142, the upper computer 142 can directly issue a speed instruction, collect a real-time speed through a speed sensor, and compare and analyze the real-time speed with the speed issued by the upper computer 142, to automatically adjust the speed of the dynamometer, thereby effectively ensuring the stability of the torque of the dynamometer.

[0050] In a possible implementation, the control module further includes a current loop regulator and a park converter. As shown in Figure 4 The PID adjustment controller is connected with the current loop regulator and the pulse modulator. The park converter is electrically connected with the current and voltage sensor. The park converter performs park conversion on current and voltage data, and sends the converted information to the current loop regulator. The current loop regulator controls the pulse modulator based on the received park conversion result and the output information of the PID adjustment controller.

[0051] As shown in Figure 2 In an embodiment of the present application, the motor testing device 100 further includes a motor environment bin. The motor to be tested 010 is located in the motor environment bin. The motor environment bin can control the temperature in the bin, thereby realizing the test of the working performance of the motor under different temperature environments. For example, the motor environment bin is provided with a cooling device and a heating device. The cooling device can reduce the temperature in the motor environment bin, and the heating device can increase the temperature in the motor environment bin. The cooling device and the heating device can be integrated together, such as an air conditioner. The cooling device and the heating device can be independent devices respectively, such as a water / oil / air cooling device and an electric heating device.

[0052] In a possible implementation, the adjustable temperature range of the motor environment bin is -60℃ to 150℃. Therefore, the motor environment bin can simulate the working environment of the motor to be tested 010 under different temperatures.

[0053] As shown in Figure 2 In an embodiment of the present application, the motor testing device 100 further includes a power distribution control unit 160. The power distribution control unit 160 is electrically connected with the rotating shaft 1211 of the first dynamometer 111 and the second dynamometer respectively. The power distribution control unit 160 is used for power distribution control. The power distribution control unit 160 can be integrated in a power distribution cabinet.

[0054] As shown in Figure 2As shown in the embodiment of the present application, the motor testing device 100 further comprises a first torque protector 105 and / or a second torque protector 106, the first torque protector 105 is located between the motor to be tested 010 and the first testing unit 110, and the second torque protector 106 is located between the motor to be tested 010 and the second testing unit 120.

[0055] As shown in the embodiment of the present application, the motor testing device 100 further comprises a first torque protector 105 and / or a second torque protector 106, the first torque protector 105 is located between the motor to be tested 010 and the first testing unit 110, and the second torque protector 106 is located between the motor to be tested 010 and the second testing unit 120. Figure 2 As shown in a possible implementation, the motor to be tested 010 is a three-in-one assembly motor. The motor to be tested 010 comprises a driving motor 011, a driving motor controller 012 and a reduction gearbox 013. The motor to be tested 010 is drivingly connected with the dynamometer through a tooling half shaft. The reduction gearbox 013 is provided with left and right two inner spline output ports, i.e., a first inner spline output port and a second inner spline output port. The first inner spline output port of the reduction gearbox 013 is connected with the first tooling half shaft 101 through spline. The other end of the first tooling half shaft 101 is connected with the first flange 103 disc. The first flange 103 disc is connected with the first torque protector 105, and the other end of the first torque protector 105 is connected with the rotating shaft 1111 of the first dynamometer. The second inner spline output port of the reduction gearbox 013 is connected with the second tooling half shaft 102 through spline. The other end of the second tooling half shaft 102 is connected with the second flange 104 disc. The second flange 104 disc is connected with the second torque protector 106, and the other end of the second torque protector 106 is connected with the rotating shaft of the rotating shaft 1211 of the second dynamometer.

[0056] The first flange 103 disc and the second flange 104 disc are flexible pipe joint flanges, which have certain flexibility, can maintain certain flexibility under conditions such as pressure and temperature change, and can withstand certain angular deviation, vibration and thermal expansion and contraction. The first torque protector 105 and the second torque protector 106 have torque protection function. When the torque on the rotating shaft is greater than the upper limit value of the torque protector, the torque protector is disconnected from the flange, so as to ensure that the dynamometer is not damaged.

[0057] As shown in the embodiment of the present application, the motor testing device 100 further comprises a first torque protector 105 and / or a second torque protector 106, the first torque protector 105 is located between the motor to be tested 010 and the first testing unit 110, and the second torque protector 106 is located between the motor to be tested 010 and the second testing unit 120. Figure 5 As shown in the embodiment of the present application, the motor testing device 100 further comprises a first torque protector 105 and / or a second torque protector 106, the first torque protector 105 is located between the motor to be tested 010 and the first testing unit 110, and the second torque protector 106 is located between the motor to be tested 010 and the second testing unit 120.

[0058] S1, connection inspection and communication test. Specifically, it includes: confirming that all wire harnesses, water pipes, splines and other docking places are connected perfectly and abnormally, turning on the power supply of the first power module (for example, low-voltage power supply), adjusting the output voltage according to the motor testing requirement, confirming in the upper computer that the CAN communication has been connected, no fault code is reported in the software, and the communication with the driving motor controller is normal.

[0059] S2, according to technical requirements, cooling water is introduced and the ambient temperature is adjusted. Specifically, according to product technical requirements, cooling water is introduced, the ambient temperature is adjusted to the temperature value specified in the product technical requirements, and the next step is performed after the ambient temperature is stable.

[0060] S3, the dynamometer is started. Specifically, the dynamometer (including the first dynamometer and the second dynamometer) is started, and the speed command is sent to the dynamometer by the upper computer. The speed sensor can detect in real time whether the speed of the dynamometer reaches the command value given by the upper computer, and the next step is performed after the speed of the dynamometer is stable.

[0061] S4, the three-in-one assembly motor to be tested is started. Specifically, the three-in-one assembly motor to be tested is started, the torque command is sent to the three-in-one assembly motor to be tested by the upper computer, and the torque on the dynamometer shaft is detected in real time by the torque sensor. The next step is performed after the torque is stable.

[0062] S5, data recording and saving. Specifically, the voltage and current of the three-in-one assembly motor to be tested are recorded by the upper computer, the power of the motor is calculated by the power analyzer, and the motor temperature, IGBT temperature, three-phase voltage, and three-phase current detected in the motor controller are recorded.

[0063] In one possible implementation, in S3, after the dynamometer is started, the speed sensor feeds back the real-time detected speed to the PID adjustment controller, and through comparative analysis, the dynamometer speed is stabilized by pulse width modulation, and the speed difference between the first dynamometer and the second dynamometer can be effectively reduced.

[0064] According to the above basic test steps, the embodiment provides a specific test step for the external characteristic of the three-in-one assembly motor as follows:

[0065] (1) After the motor test device is connected to the three-in-one assembly motor product, it is confirmed that the connection between the dynamometer, the spline half shaft, and the three-in-one assembly motor is normal, the positive and negative connections of the high-voltage wire harness are correct, and the low-voltage wire harness, cooling water pipe, etc. are all connected well; the low-voltage power supply is turned on, the communication between the upper computer and the product is debugged, and it is confirmed that the communication is normal.

[0066] (2) According to the product technical requirements, cooling water of specified temperature and flow is introduced, the ambient temperature is adjusted to the temperature value specified in the product technical requirements, and the next step is performed after the ambient temperature is stable.

[0067] (3) Start the dynamometer, and through the upper computer dynamometer controller, give the specified high voltage to the dynamometer distribution cabinet, open the dynamometer speed control mode, and send the first speed instruction to the dynamometer through the upper computer; after the instruction is issued, the first dynamometer and the second dynamometer can rotate at the same speed and opposite speed.

[0068] (4) The speed sensor can detect in real time whether the dynamometer speed reaches the instruction value given by the upper computer, and the speed sensor feeds back the real-time detected speed value to the dynamometer inverter, the dynamometer inverter compares the speed value of the speed sensor with the speed instruction value issued in the upper computer, and through PID adjustment and pulse width modulation, the dynamometer quickly and stably outputs to the instruction value specified by the upper computer, and can still maintain the stable output of the speed when the torque of the three-in-one assembly motor is given in the next step.

[0069] (5) Through the upper computer, give the second power module an instruction, so that the second power module continuously and stably outputs the rated voltage of the three-in-one assembly motor during operation, and through the upper computer and the communication module, adjust the three-in-one assembly motor to the torque output mode, and send the first torque instruction to the three-in-one assembly motor through the upper computer;

[0070] (6) After the torque is stably output, keep for 5S, and record the values recorded by the dot recording power analyzer and the speed torque sensor; and calculate the torque of the three-in-one assembly motor, the torque calculation method of the three-in-one assembly motor is (first dynamometer torque sensor feedback value + first dynamometer torque sensor feedback value) / reduction ratio of three-in-one assembly motor reduction box;

[0071] (7) Repeat steps (3)-(6) until all speed and torque working conditions are tested;

[0072] (8) Through the dot-recorded torque, torque, voltage, current, power and other data, analyze the external characteristic data of the three-in-one assembly motor, and draw the external characteristic data graph as Figure 6 . Figure 6 The figure shows the maximum output torque and maximum output power corresponding to the speed. Among them, the left vertical coordinate is torque, and the right vertical coordinate is power.

[0073] In this specification, the same and similar parts among various embodiments can be referred to each other. Especially, for the device embodiments and the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the related parts can be referred to the description in the method embodiments.

Claims

1. An electrical machine testing apparatus, characterized in that, The application relates to a motor test device. The motor test device comprises a first test unit connected with a motor to be tested, a second test unit connected with the motor to be tested, a cooling unit connected with a cooling circulation component of the motor to be tested, and a processing and analyzing unit connected with the motor to be tested. The first test unit comprises a first dynamometer, a first controller and a first detection module. The first detection module is arranged around a rotating shaft of the first dynamometer. The first detection module comprises a first rotating speed sensor and a first torque sensor.

2. The motor testing device of claim 1, wherein, The processing and analyzing unit comprises a power analyzer.

3. The motor testing apparatus of claim 2, wherein, The processing and analyzing unit further comprises a host computer and a communication module.

4. The motor testing device of claim 1, wherein, The host computer is in communication connection with the cooling unit, the first test unit and the second test unit.

5. The motor testing apparatus of claim 4, wherein, The motor test device further comprises a power conversion unit in electric connection with the processing and analyzing unit, the first test unit, the second test unit and the motor to be tested.

6. The motor testing device of claim 1, wherein, The motor test device further comprises a motor environment chamber. The motor test device further comprises a first torque protector and / or a second torque protector.

7. The motor testing device of claim 1, wherein, The first torque protector is arranged between the motor to be tested and the first test unit. The second torque protector is arranged between the motor to be tested and the second test unit.

8. The motor testing device of claim 1, wherein, The power conversion unit comprises a first power conversion module and a second power conversion module.

9. The motor testing device of claim 6, wherein, The first power conversion module is in electric connection with the processing and analyzing unit.

10. The motor testing apparatus of claim 9, wherein, The second power conversion module is in electric connection with the motor to be tested. The power conversion unit further comprises a third power conversion module. The third power conversion module is in electric connection with the first test unit and the second test unit.

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