Device and method for testing electromagnetic compatibility of integrated hybrid transmission

Abstract

The invention provides a device and method for testing the electromagnetic compatibility of an integrated hybrid transmission, and belongs to the technical field of transmission testing. A tested transmission is installed on a supporting unit, the supporting unit can switch testing positions, and when the supporting unit is located at a first testing position, an input shaft of the tested transmission is aligned with a rack motor; carrying out an electromagnetic compatibility test under a power generation working condition; when the supporting unit is located at the second testing position, a differential jack of the tested transmission can be aligned with the rack motor, and an electromagnetic compatibility test under a driving working condition is carried out; the single-rack motor is used as a power source, the engine is simulated to provide power, the wheels are simulated to provide road resistance, the number of motors needed for testing is reduced, the length of a metal shaft is shortened, interference of testing equipment on a testing result is reduced, the testing energy consumption requirement is reduced, and the testing cost is saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transmission testing, and more specifically, relates to an electromagnetic compatibility performance testing device and method for an integrated hybrid-specific transmission. Background Art

[0002] The integrated hybrid transmission has a compact structure, and the electronic components such as drive motors, generators, controllers, electronic oil pumps, solenoid valves, etc. are densely arranged and diverse in style. In addition, high-voltage electricity, low-voltage electricity and signal transmission run in parallel, generating electromagnetic radiation during operation. Combined with the internal and external electromagnetic environment of the vehicle, the electromagnetic environment of the entire transmission assembly is complex and changeable. Therefore, electromagnetic compatibility performance testing is required to measure the electromagnetic radiation and electromagnetic interference resistance of individual electronic components and between components in the integrated hybrid transmission to ensure that the integrated hybrid transmission can operate normally in a complex and changeable electromagnetic environment.

[0003] Currently, there are two main methods and arrangements for testing the electromagnetic compatibility performance of integrated hybrid transmissions. The first solution is to take out the transmission motor controller separately and place it separately on an electromagnetic compatibility test bench for testing. The test conditions simulate the operating conditions of the transmission motor controller controlling the generator and drive motor on the whole vehicle, and measure the electromagnetic compatibility performance under different operating conditions. There are two disadvantages. On the one hand, the test object is incomplete. The single test of the transmission motor controller only performs circuit operation by setting simulated conditions, which is different from the actual operating conditions of the integrated hybrid transmission, and the test results are not comprehensive. On the other hand, the integrated hybrid transmission body also has other electronic components, such as motors, electronic oil pumps, etc., and the electromagnetic compatibility between electronic components is difficult to verify. Factors related to performance (including radiation and anti-interference) cannot be considered and verified; the second solution is to use dual motors for testing. The dual motors are set as dynamometers, and the integrated hybrid dedicated transmission is arranged in the middle of the dual motors. One motor simulates the operation of the engine and performs electromagnetic compatibility tests under power generation conditions. The other motor simulates the operation of the wheels and performs electromagnetic compatibility tests under driving conditions. Based on the test bench structure and operation intensity requirements, a longer (3 to 4 m) metal shaft is used on one side, and the metal shaft is exposed to the test environment. The metal shaft has good conductivity and generates electromagnetic effects on the metal shaft, which can reflect electromagnetic radiation to a certain extent and affect the radiation emission test results. There is still great controversy in the industry about its test method and device layout, and the test cost is expensive.

[0004] In summary, the current integrated hybrid transmission electromagnetic compatibility performance test layout and test method have disadvantages such as incomplete test objects, incomplete test conditions, the dual-motor layout scheme affecting the test results and high test costs. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated hybrid-specific transmission electromagnetic compatibility performance testing device and method to address the problems of separate testing of the transmission motor controller, low test result accuracy, and expensive testing costs for dual-motor arrangements in existing testing technologies.

[0006] In order to achieve the above-mentioned objective, a first aspect of the present invention provides an integrated hybrid transmission electromagnetic compatibility performance testing device and method.

[0007] The integrated hybrid transmission electromagnetic compatibility performance test device uses a single-bench motor as the power source, including:

[0008] A support unit having a mounting surface on which the transmission under test can be mounted, the support unit being mounted on the ground and being switchable between at least two test positions;

[0009] When the support unit is located at the first test position, the input shaft of the transmission under test can be aligned with the test bench motor to perform an electromagnetic compatibility test under power generation conditions;

[0010] When the support unit is located at the second test position, the differential socket of the transmission under test can be aligned with the test bench motor to perform an electromagnetic compatibility test under a driving condition;

[0011] A transmission shaft, one end of which can be connected to the input shaft of the transmission under test, and the other end of which can be connected to the output shaft of the test bench motor, for electromagnetic compatibility testing under power generation conditions;

[0012] The driving half shaft can be connected to the differential of the transmission under test at one end and to the output shaft of the test bench motor at the other end, and is used for electromagnetic compatibility testing under driving conditions;

[0013] The locking component can lock the internal gears of the differential and is used for electromagnetic compatibility testing under driving conditions.

[0014] The test setup also includes:

[0015] The sealing component can seal the socket of the differential.

[0016] The support unit comprises:

[0017] A first support frame having a first mounting surface, and an upper suspension of the transmission under test can be mounted on the first mounting surface;

[0018] A second support frame having a second mounting surface, and a housing of the transmission under test can be mounted on the second mounting surface when the support unit is located at the second test position;

[0019] a third support frame having a third mounting surface, on which the lower suspension of the transmission under test can be mounted when the support unit is located at the second test position;

[0020] A mounting flange is provided, one side of which forms a fourth mounting surface, and the joint surface between the transmission under test and the engine can be mounted on the fourth mounting surface. The other side of the mounting flange can be connected to the bench mounting panel in the test room. A through hole is provided in the middle of the mounting flange, and the position of the through hole corresponds to the position of the input shaft of the transmission under test, and the through hole can allow the transmission shaft to pass through.

[0021] The first support frame comprises:

[0022] The first supporting leg and the second supporting leg have bottoms fixedly connected to the ground;

[0023] The I-shaped bracket has an upper surface forming a first mounting surface, and a lower surface detachably connected to the top of the first supporting leg and the second supporting leg.

[0024] The second support frame has a third support leg and an L-shaped fixed support plate, the bottom of the third support leg is connected to the ground, the L-shaped fixed support plate is connected to the top of the third support leg, and the L-shaped fixed support plate is formed with a second mounting surface;

[0025] The third support frame has a fourth support leg and a pad, the bottom of the fourth support leg is connected to the ground, the pad is connected to the top of the fourth support leg, and the pad forms a third installation surface.

[0026] A second aspect of the present invention provides an integrated hybrid transmission electromagnetic compatibility performance testing method, using the integrated hybrid transmission electromagnetic compatibility performance testing device of the first aspect of the present invention, comprising:

[0027] Adjusting the support unit to a first test position and mounting the transmission under test on a mounting surface of the support unit;

[0028] Connect one end of the transmission shaft to the input shaft of the transmission under test, and the other end to the output shaft of the test bench motor;

[0029] Use a bench motor to simulate the engine to drive the generator of the tested transmission to perform electromagnetic compatibility testing under power generation conditions;

[0030] Remove the transmission shaft and adjust the transmission under test to the second test position;

[0031] Connect one end of the driving half shaft to the differential of the transmission under test, and the other end to the output shaft of the test bench motor;

[0032] Use locking components to lock the gears inside the differential;

[0033] The test bench motor is used to simulate the wheel on one side. The driving motor of the transmission under test drives the test bench motor to operate, and the electromagnetic compatibility test under driving conditions is carried out.

[0034] The electromagnetic compatibility test under the power generation condition includes:

[0035] The motor controller built into the tested transmission is placed in an open-tube, no-current-output, no-speed state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0036] The test bench motor inputs speed and torque to the generator, so that the generator speed reaches the set speed and the generator torque reaches the first set percentage of the generator rated torque. The motor controller and the generator are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0037] The test bench motor outputs speed and torque to the generator so that the generator speed reaches the set percentage of the rated speed of the generator, the generator torque reaches the second set percentage of the rated torque of the generator, and the mechanical input load of the generator reaches the set percentage of the continuous power of the generator. The built-in high-voltage DC-low-voltage DC converter is in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and generator are in high-power state, and emission and immunity electromagnetic compatibility tests are carried out.

[0038] The electromagnetic compatibility test under the power generation condition also includes:

[0039] The transmission under test is not connected to any peripheral wiring harness and the electrostatic discharge test is performed;

[0040] The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

[0041] The electromagnetic compatibility test under the driving condition includes:

[0042] The motor controller built into the tested transmission is placed in an open-tube, no-current-output, no-speed state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0043] The driving motor outputs speed and torque to the test bench motor, the driving motor speed is set to the set speed, the driving motor torque is set to the first set percentage of the rated torque of the driving motor, the motor controller and the driving motor are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0044] The drive motor outputs speed and torque to the test bench motor, the drive motor speed is set to a set percentage of the rated speed of the drive motor, the drive motor torque is set to a second set percentage of the rated torque of the drive motor, and the drive motor mechanical output load reaches the set percentage of the continuous power of the drive motor. The built-in high-voltage DC-low-voltage DC converter is located in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and the drive motor are in a high-power state, and emission and immunity electromagnetic compatibility tests are performed.

[0045] The electromagnetic compatibility test under the driving condition also includes:

[0046] The integrated hybrid-specific transmission is not connected to any peripheral wiring harness for electrostatic discharge testing;

[0047] The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

[0048] The present invention provides an integrated hybrid-specific transmission electromagnetic compatibility performance testing device and method, which have the following beneficial effects: the transmission under test is installed on a support unit, and the support unit can switch the test position. When the support unit is in the first test position, the input shaft of the transmission under test is aligned with the bench motor to perform an electromagnetic compatibility test under a power generation condition; when the support unit is in the second test position, the differential socket of the transmission under test is aligned with the bench motor to perform an electromagnetic compatibility test under a driving condition; a single bench motor is used as a power source to simulate the engine providing power and the wheels providing road resistance, thereby reducing the number of motors required for the test, shortening the length of the metal shaft, reducing the interference of the test equipment on the test results, reducing the test energy consumption demand, and saving the test cost.

[0049] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0051] Figure 1 One of the schematic structural diagrams of an integrated hybrid transmission electromagnetic compatibility performance testing device according to an embodiment of the present invention performing an electromagnetic compatibility test under a power generation condition is shown;

[0052] Figure 2 A second schematic structural diagram showing an electromagnetic compatibility test under power generation conditions performed by an integrated hybrid transmission electromagnetic compatibility performance test device according to an embodiment of the present invention;

[0053] Figure 3 One of the schematic structural diagrams of an integrated hybrid transmission electromagnetic compatibility performance testing device for performing electromagnetic compatibility testing under driving conditions according to an embodiment of the present invention is shown;

[0054] Figure 4 A second schematic structural diagram showing an electromagnetic compatibility test under driving conditions performed by an integrated hybrid transmission electromagnetic compatibility performance test device according to an embodiment of the present invention;

[0055] Figure 5 A flow chart of an integrated hybrid transmission electromagnetic compatibility performance testing method according to an embodiment of the present invention is shown.

[0056] Description of reference numerals:

[0057] 1. Support unit; 11. First support frame; 11a. First mounting surface; 11b. First support leg; 11c. Second support leg; 11d. I-shaped bracket; 12. Second support frame; 12a. Second mounting surface; 12b. Third support leg; 12c. L-shaped fixed support plate; 13. Third support frame; 13a. Third mounting surface; 13b. Fourth support leg; 13c. Cushion; 14. Mounting flange; 14a. Fourth mounting surface;

[0058] 2. Transmission shaft;

[0059] 3. Driving half shaft;

[0060] 4. Locking parts;

[0061] 5. Sealing components;

[0062] 6. Transmission under test; 61. Differential; 62. Upper suspension; 63. Lower suspension. DETAILED DESCRIPTION

[0063] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0064] This embodiment provides an integrated hybrid-specific transmission electromagnetic compatibility performance testing device and method, using a single test bench motor as a power source.

[0065] like Figure 1-4 As shown, the integrated hybrid transmission electromagnetic compatibility performance test device includes:

[0066] A support unit 1 having a mounting surface, on which a transmission 6 to be tested can be mounted, the support unit 1 being mounted on the ground and being switchable between at least two test positions;

[0067] When the support unit 1 is located at the first test position, the input shaft of the transmission 6 to be tested can be aligned with the test bench motor to perform an electromagnetic compatibility test under power generation conditions;

[0068] When the support unit 1 is located at the second test position, the socket of the differential 61 of the tested transmission 6 can be aligned with the test bench motor to perform an electromagnetic compatibility test under a driving condition;

[0069] A transmission shaft 2, one end of which can be connected to the input shaft of the transmission 6 under test, and the other end of which can be connected to the output shaft of the test bench motor, for electromagnetic compatibility testing under power generation conditions;

[0070] A driving half shaft 3, one end of which can be connected to the differential 61 of the transmission 6 under test, and the other end of which can be connected to the output shaft of the test bench motor, for electromagnetic compatibility testing under driving conditions;

[0071] The locking component 4 can lock the internal gears of the differential 61 for electromagnetic compatibility testing under driving conditions.

[0072] In this embodiment, a single bench motor device is used for testing. According to the configuration of the integrated hybrid-specific transmission, the support unit 1 is set to a switchable test position. When the support unit 1 is in the first test position, the input shaft of the tested transmission 6 is aligned with the bench motor, and the internal spline at one end of the transmission shaft 2 is connected to the external spline of the input shaft of the tested transmission 6. At the same time, the external spline of the bench motor output shaft is connected to the internal spline at the other end of the transmission shaft 2 to ensure that the bench motor can output power to the tested transmission 6. The bench motor simulates the engine driving the generator in the transmission to achieve power generation conditions, and performs electromagnetic compatibility testing under power generation conditions. At the same time, the motor controller at the upper end of the tested transmission 6 can be normally connected to the high-voltage wiring harness and the low-voltage wiring harness to achieve synchronous and normal operation of high and low voltage. Electronic components such as the electronic oil pump and the solenoid valve can be powered on and operate normally. The state of the tested transmission 6 can be consistent with the operating state of the whole vehicle. When the support unit 1 is located at the second test position, the socket on one side of the differential 61 of the tested transmission 6 is aligned with the test bench motor, the locking component 4 is inserted into the socket on the other side to lock the internal gear of the differential 61, one end of the driving half shaft 3 is inserted into the socket on one side of the internal differential 61 of the tested transmission and connected with a spline, and the other end of the driving half shaft 3 is splined to the output shaft of the test bench motor. The built-in motor controller of the integrated hybrid dedicated transmission is connected to the high and low voltage wiring harnesses to work normally, and directly controls the output power of the built-in driving motor of the transmission. The output power is transmitted to the test bench motor through the internal gears of the transmission and the differential 61 and the half shafts, and finally to the test bench motor. The test bench motor simulates the wheel to provide road resistance and performs electromagnetic compatibility test of the driving condition. During the test, electronic components such as the electronic oil pump and the solenoid valve can be powered on and operate normally, and the state of the tested transmission 6 can be consistent with the operating state of the whole vehicle. The test device uses a single test bench motor as a power source by switching between two test positions of the support unit 1, simulating the engine to provide power and the wheels to provide road resistance. This not only reduces the number of motors required for the test, but also shortens the length of the metal shaft, reduces the interference of the test equipment on the test results, reduces the test energy consumption demand, and saves test costs. It should be noted that a variety of methods can be selected to install the tested transmission 6 on the mounting surface of the support unit 1, for example: the housing of the tested transmission 6 is connected to the mounting surface, the upper suspension 62 of the tested transmission 6 is connected to the mounting surface, the lower suspension 63 of the tested transmission 6 is connected to the mounting surface, the joint surface between the tested transmission and the engine is connected to the mounting surface, etc.; there are also a variety of options for switching the test position of the support unit 1, such as realizing rotation, translation, and flipping through the structure of the support unit 1 itself, or realizing rotation, translation, and flipping through the overall lifting of the support unit 1 and the tested transmission 6; the sealing component 5 can use a shaft head flange, the shaft head of the shaft head flange is inserted into the differential 61 into the socket on the other side and matched through a spline connection, two bolts fix the shaft head flange to the housing of the transmission, and the differential 61 gears are fixed and locked by using two fixed points and the shaft head spline.

[0073] Optionally, a connecting flange is provided at the other end of the driving half shaft 3, and the connecting flange is used to connect with the output shaft of the test bench motor. Specifically, one end of the driving half shaft 3 is inserted into a socket on one side of the internal differential 61 of the transmission to be tested and connected with a spline, and the other end of the driving half shaft 3 is inserted into the connecting flange and connected with a spline, and the connecting flange is spline-connected with the output shaft of the test bench motor for power transmission.

[0074] Furthermore, the testing device also includes:

[0075] The plugging component 5 can seal the socket of the differential 61. Specifically, when performing the electromagnetic compatibility test under the power generation condition, the socket of the differential 61 is in an open state, which is prone to oil leakage. To avoid this, the plugging component 5 is used to seal the socket of the differential 61. Optionally, the plugging component 5 is a half-axle plug.

[0076] Furthermore, the support unit 1 comprises:

[0077] A first support frame 11 having a first mounting surface 11a, and an upper suspension 62 of the transmission 6 to be tested can be mounted on the first mounting surface 11a;

[0078] A second support frame 12, having a second mounting surface 12a, and a housing of the tested transmission 6 can be mounted on the second mounting surface 12a when the support unit 1 is located at the second test position;

[0079] A third support frame 13, having a third mounting surface 13a, on which the lower suspension 63 of the transmission 6 to be tested can be mounted when the support unit 1 is located at the second test position;

[0080] A mounting flange 14 is provided, one side of which forms a fourth mounting surface 14a, and the interface between the transmission 6 under test and the engine can be mounted on the fourth mounting surface 14a. The other side of the mounting flange 14 can be connected to the bench mounting panel in the test room. A through hole is provided in the middle of the mounting flange 14, and the position of the through hole corresponds to the position of the input shaft of the transmission 6 under test, and the through hole can allow the transmission shaft 2 to pass through.

[0081] Optionally, the first support frame 11 includes:

[0082] The first supporting leg 11b and the second supporting leg 11c are both fixedly connected to the ground at the bottom;

[0083] The I-shaped bracket 11d has an upper surface forming the first mounting surface 11a, and a lower surface detachably connected to the top of the first supporting leg 11b and the second supporting leg 11c.

[0084] The second support frame 12 has a third support leg 12b and an L-shaped fixed support plate 12C, the bottom of the third support leg 12b is connected to the ground, the L-shaped fixed support plate 12C is connected to the top of the third support leg 12b, and the L-shaped fixed support plate 12C is formed with a second mounting surface 12a;

[0085] The third support frame 13 has a fourth support leg 13b and a cushion block 13c. The bottom of the fourth support leg 13b is connected to the ground, and the cushion block 13c is connected to the top of the fourth support leg 13b. The cushion block 13c forms a third mounting surface 13a.

[0086] In this embodiment, when the support unit 1 is located at the first test position to perform the electromagnetic compatibility test under the power generation condition, the tested transmission 6 is installed on the first support frame 11 and the mounting flange 14 to form a "two-point and one-side" support structure, and the "two points" are the first support leg 11b and the second support leg 11c. The tops of the first support leg 11b and the second support leg 11c are respectively fixed to the lower surface of the I-shaped bracket 11d by bolts, and the upper surface of the I-shaped bracket 11d is fixedly connected to the upper suspension 62 of the tested transmission 6 by bolts to ensure that the two points are supported effectively. The "one side" refers to the joint surface of the tested transmission 6 and the engine being fixed to one side of the mounting flange 14 by bolts, and the other side of the mounting flange 14 is connected to the bench mounting panel by bolts; when the support unit 1 is located at the second test position to perform the electromagnetic compatibility test under the driving condition, the tested transmission 6 is installed on the first support frame 11, the first support frame 11 and the third support frame 13 to form a "four-point" support structure, and the "four points" are the first support leg 11b, the second support leg 11c, the third support leg 12b, and the fourth support leg 13b. The "two-point and one-plane" support structure and the "four-point" support structure can ensure the stable placement and operation of the tested transmission 6; the I-shaped bracket 11d is detachably connected to the top of the first supporting leg 11b and the second supporting leg 11c, so that the I-shaped bracket 11d can realize the switching of the test position of the support unit 1 by rotation, translation, flipping, etc.

[0087] like Figure 5 As shown, this embodiment also provides an electromagnetic compatibility performance test method for an integrated hybrid transmission, using the test device of the present invention, the test object is the integrated hybrid transmission as a whole, the power source is a single bench motor, and the test includes the following steps:

[0088] Adjusting the transmission 6 to be tested to a first test position and mounting the transmission 6 to be tested on the mounting surface of the support unit 1;

[0089] Connect one end of the transmission shaft 2 to the input shaft of the transmission 6 to be tested, and the other end to the output shaft of the test bench motor;

[0090] Using a bench motor to simulate an engine to drive the generator of the transmission 6 under test to perform electromagnetic compatibility testing under power generation conditions;

[0091] Remove the transmission shaft 2 and adjust the transmission 6 to the second test position;

[0092] Connect one end of the driving half shaft 3 to the differential 61 of the transmission 6 to be tested, and the other end to the output shaft of the test bench motor;

[0093] The internal gear of the differential 61 is locked by using the locking component 4;

[0094] The test bench motor is used to simulate the wheel on one side, and the driving motor of the tested transmission 6 drives the test bench motor to operate, so as to perform the electromagnetic compatibility test under the driving condition.

[0095] Specifically, in terms of test objects, the test of the transmission motor controller unit is abandoned, and the test object is determined as the integrated hybrid dedicated transmission as a whole, which is in line with the actual operating status of the hybrid transmission as a whole; in terms of the validity of the test results, a single bench motor is used as the power source to simulate the engine to provide power and the wheels to provide road resistance, thereby reducing the interference of the test equipment on the test results; in terms of versatility and test costs, domestic dual-motor darkrooms are scarce, bench test resources are tight, and test costs are expensive. This test method is suitable for single bench motor electromagnetic compatibility test laboratories, which makes bench tests more versatile and less expensive, and the test equipment has been optimized to reduce the test energy consumption requirements, and the overall test operation cost will be further reduced.

[0096] Furthermore, the electromagnetic compatibility test under the power generation condition includes:

[0097] The motor controller built into the transmission 6 under test is placed in an open-tube, no-current-output, no-speed state, and an emission-type and an anti-interference-type electromagnetic compatibility test is performed;

[0098] The test bench motor inputs speed and torque to the generator, so that the generator speed reaches the set speed and the generator torque reaches the first set percentage of the generator rated torque. The motor controller and the generator are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0099] The test bench motor outputs speed and torque to the generator so that the generator speed reaches the set percentage of the rated speed of the generator, the generator torque reaches the second set percentage of the rated torque of the generator, and the mechanical input load of the generator reaches the set percentage of the continuous power of the generator. The built-in high-voltage DC-low-voltage DC converter is in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and generator are in high-power state, and emission and immunity electromagnetic compatibility tests are carried out.

[0100] In this embodiment, the set speed is 100r / min, the first set percentage of the generator rated torque is 10%, the set percentage of the generator rated speed is 50%, the second set percentage of the generator rated torque is 100%, and the set percentage of the generator continuous power is 50%; in specific implementation, if the generator speed does not reach 50% of the generator rated speed or the generator torque does not reach 100% of the generator rated torque, the set percentage of the generator rated speed or the second set percentage of the generator rated torque can be adjusted to make the generator power reach 50% of the motor continuous power, that is, the set percentage of the generator rated speed × the second set percentage of the generator rated torque = 50%.

[0101] Furthermore, the electromagnetic compatibility test under the power generation condition also includes:

[0102] The transmission 6 under test is not connected to any peripheral wiring harness and an electrostatic discharge test is performed;

[0103] The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

[0104] Furthermore, the electromagnetic compatibility test under the driving condition includes:

[0105] The motor controller built into the transmission 6 under test is placed in an open-tube, no-current-output, no-speed state, and an emission-type and an anti-interference-type electromagnetic compatibility test is performed;

[0106] The driving motor outputs speed and torque to the test bench motor, the driving motor speed is set to the set speed, the driving motor torque is set to the first set percentage of the rated torque of the driving motor, the motor controller and the driving motor are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed;

[0107] The drive motor outputs speed and torque to the test bench motor, the drive motor speed is set to a set percentage of the rated speed of the drive motor, the drive motor torque is set to a second set percentage of the rated torque of the drive motor, and the drive motor mechanical output load reaches the set percentage of the continuous power of the drive motor. The built-in high-voltage DC-low-voltage DC converter is located in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and the drive motor are in a high-power state, and emission and immunity electromagnetic compatibility tests are performed.

[0108] In this embodiment, the set speed is 100r / min, the first set percentage of the rated torque of the drive motor is 10%, the set percentage of the rated speed of the drive motor is 50%, the second set percentage of the rated torque of the drive motor is 100%, and the set percentage of the continuous power of the drive motor is 50%; if the speed of the drive motor does not reach 50% of the rated speed of the drive motor or the torque of the drive motor does not reach 100% of the rated torque of the drive motor, the set percentage of the rated speed of the drive motor or the second set percentage of the rated torque of the drive motor can be adjusted so that the drive motor power reaches 50% of the continuous power of the drive motor, that is, the set percentage of the rated speed of the drive motor × the second set percentage of the rated torque of the drive motor = 50%.

[0109] Furthermore, the electromagnetic compatibility test under the driving condition also includes:

[0110] The integrated hybrid-specific transmission is not connected to any peripheral wiring harness for electrostatic discharge testing;

[0111] The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

[0112] Specifically, emission tests include radiated emission, low-frequency magnetic field emission, electromagnetic field radiated emission, low-voltage conducted emission, high-voltage conducted emission, high-low voltage coupling, and transient conducted emission; immunity tests include radiated immunity BCI method, radiated immunity ALSE method, low-frequency magnetic field emission, power line transient immunity, and signal line transient immunity.

[0113] In summary, the present test method has obvious advantages over the traditional method in terms of electromagnetic interference effects inside and outside the test site, applicability and cost. The traditional single-body controller electromagnetic compatibility test is limited to the controller body, which weakens the electromagnetic interference effects between the directly related electrical components in the transmission (such as generators, drive motors, electronic oil pumps, electronic valves, etc.). The test results are limited to the controller body, and the consistency with the electromagnetic interference of the controller in the actual operation state inside the transmission is more than 50%. Its applicability is insufficient, and electromagnetic compatibility testing is usually required on the entire transmission. Another traditional method is to place the entire transmission on a three-motor test bench for electromagnetic compatibility testing. Due to the structural limitations of the transmission itself, a long metal shaft (about 3m) must be set at the input end of the transmission on the three-motor bench layout to achieve power transmission from the bench drive motor to the transmission. However, the long metal shaft arrangement will inevitably lead to electromagnetic interference of the metal shaft on the transmission at the test site, which increases the electromagnetic interference of the test bench on the transmission, resulting in the test results of the electromagnetic interference test items in the electromagnetic compatibility of the transmission being lower than the actual ones. In addition, the resources of the three-motor test bench are scarce, and the cost is more than 50% higher than the cost of the test method used in the present invention. Two test structures in this embodiment: electromagnetic compatibility test of the whole machine starting mechanism and the whole machine driving mechanism, three test states: static, low power and high power electromagnetic compatibility test, a total of 6 test conditions, make the test conditions more in line with practical applications, and can actually measure the electromagnetic compatibility of the motor controller under most operating conditions of the whole vehicle, with lower cost and stronger applicability.

[0114] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An integrated hybrid transmission electromagnetic compatibility performance test device, using a single bench motor as a power source, characterized in that: The test setup includes: A support unit (1) having a mounting surface, on which a transmission (6) to be tested can be mounted, the support unit (1) being mounted on the ground and being switchable between at least two test positions; When the support unit (1) is located at the first test position, the input shaft of the transmission (6) under test can be aligned with the test bench motor to perform an electromagnetic compatibility test under power generation conditions; When the support unit (1) is located at the second test position, the differential (61) socket of the tested transmission (6) can be aligned with the test bench motor to perform an electromagnetic compatibility test under a driving condition; A transmission shaft (2), one end of which can be connected to the input shaft of the transmission (6) to be tested, and the other end of which can be connected to the output shaft of the test bench motor, for electromagnetic compatibility testing under power generation conditions; A driving half shaft (3), one end of which can be connected to a differential (61) of a transmission (6) to be tested, and the other end of which can be connected to an output shaft of a test bench motor, for electromagnetic compatibility testing under driving conditions; The locking component (4) can lock the internal gears of the differential (61) and is used for electromagnetic compatibility testing under driving conditions.

2. The integrated hybrid transmission electromagnetic compatibility performance testing device according to claim 1, characterized in that: The test setup also includes: The sealing component (5) can seal the insertion opening of the differential (61).

3. The integrated hybrid transmission electromagnetic compatibility performance testing device according to claim 1, characterized in that: The support unit (1) comprises: A first support frame (11) having a first mounting surface (11a), and an upper suspension (62) of a transmission (6) to be tested can be mounted on the first mounting surface (11a); A second support frame (12) having a second mounting surface (12a), and a housing of the tested transmission (6) can be mounted on the second mounting surface (12a) when the support unit (1) is located at the second test position; A third support frame (13) having a third mounting surface (13a), and a lower suspension (63) of the transmission (6) to be tested can be mounted on the third mounting surface (13a) when the support unit (1) is located at the second test position; A mounting flange (14) is provided, one side of the mounting flange (14) forms a fourth mounting surface (14a), the interface between the transmission (6) under test and the engine can be mounted on the fourth mounting surface (14a), the other side of the mounting flange (14) can be connected to a test bench mounting panel, the mounting flange (14) has a through hole in the middle, the position of the through hole corresponds to the position of the input shaft of the transmission (6) under test, and the through hole can allow the transmission shaft (2) to pass through.

4. The integrated hybrid transmission electromagnetic compatibility performance testing device according to claim 3, characterized in that: The first support frame (11) comprises: The first supporting leg (11b) and the second supporting leg (11c) have bottoms that are fixedly connected to the ground; An I-shaped bracket (11d) has an upper surface forming a first mounting surface (11a), and a lower surface detachably connected to the top of the first supporting leg (11b) and the second supporting leg (11c).

5. The integrated hybrid transmission electromagnetic compatibility performance testing device according to claim 3, characterized in that: The second support frame (12) comprises a third support leg (12b) and an L-shaped fixed support plate (12C), the bottom of the third support leg (12b) is connected to the ground, the L-shaped fixed support plate (12C) is connected to the top of the third support leg (12b), and the L-shaped fixed support plate (12C) is formed with a second mounting surface (12a); The third support frame (13) comprises a fourth support leg (13b) and a cushion block (13c), wherein the bottom of the fourth support leg (13b) is connected to the ground, the cushion block (13c) is connected to the top of the fourth support leg (13b), and the cushion block (13c) forms a third mounting surface (13a).

6. A method for testing electromagnetic compatibility performance of an integrated hybrid transmission, using the electromagnetic compatibility performance testing device of an integrated hybrid transmission according to any one of claims 1 to 5, characterized in that: include: Adjusting the support unit (1) to a first test position and mounting the transmission (6) to be tested on a mounting surface of the support unit (1); One end of the transmission shaft (2) is connected to the input shaft of the transmission (6) to be tested, and the other end is connected to the output shaft of the test bench motor; Using a bench motor to simulate an engine to drive the generator of the transmission (6) under test to operate, and performing an electromagnetic compatibility test under a power generation condition; Removing the transmission shaft (2) and adjusting the transmission (6) to be tested to a second test position; One end of the driving half shaft (3) is connected to the differential (61) of the transmission (6) to be tested, and the other end is connected to the output shaft of the test bench motor; Using a locking component (4) to lock the internal gear of the differential (61); A bench motor is used to simulate a wheel on one side, and the driving motor of the tested transmission (6) drives the bench motor to operate, so as to perform an electromagnetic compatibility test under a driving condition.

7. The electromagnetic compatibility performance testing method of an integrated hybrid transmission according to claim 6, characterized in that: The electromagnetic compatibility test under the power generation condition includes: The motor controller built into the transmission (6) under test is placed in an open-tube, no-current-output, no-speed state, and an emission-type and an anti-interference-type electromagnetic compatibility test is performed; The test bench motor inputs speed and torque to the generator, so that the generator speed reaches the set speed and the generator torque reaches the first set percentage of the generator rated torque. The motor controller and the generator are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed; The test bench motor outputs speed and torque to the generator so that the generator speed reaches the set percentage of the rated speed of the generator, the generator torque reaches the second set percentage of the rated torque of the generator, and the mechanical input load of the generator reaches the set percentage of the continuous power of the generator. The built-in high-voltage DC-low-voltage DC converter is in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and generator are in high-power state, and emission and immunity electromagnetic compatibility tests are carried out.

8. The electromagnetic compatibility performance testing method of an integrated hybrid transmission according to claim 7, characterized in that: The electromagnetic compatibility test under the power generation condition also includes: The transmission (6) under test is not connected to any peripheral wiring harness and an electrostatic discharge test is performed; The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

9. The electromagnetic compatibility performance testing method of an integrated hybrid transmission according to claim 6, characterized in that: The electromagnetic compatibility test under the driving condition includes: The motor controller built into the transmission (6) under test is placed in an open-tube, no-current-output, no-speed state, and an emission-type and an anti-interference-type electromagnetic compatibility test is performed; The driving motor outputs speed and torque to the test bench motor, the driving motor speed is set to the set speed, the driving motor torque is set to the first set percentage of the rated torque of the driving motor, the motor controller and the driving motor are in a low power state, and emission and anti-interference electromagnetic compatibility tests are performed; The drive motor outputs speed and torque to the test bench motor, the drive motor speed is set to a set percentage of the rated speed of the drive motor, the drive motor torque is set to a second set percentage of the rated torque of the drive motor, and the drive motor mechanical output load reaches the set percentage of the continuous power of the drive motor. The built-in high-voltage DC-low-voltage DC converter is located in the test position and the output power is the set percentage of the continuous power of the high-voltage DC-low-voltage DC converter. The motor controller and the drive motor are in a high-power state, and emission and immunity electromagnetic compatibility tests are performed.

10. The electromagnetic compatibility performance testing method of an integrated hybrid transmission according to claim 9, characterized in that: The electromagnetic compatibility test under the driving condition also includes: The integrated hybrid-specific transmission is not connected to any peripheral wiring harness for electrostatic discharge testing; The integrated hybrid transmission is powered on at low voltage but not high voltage, and an electrostatic discharge test is performed.

Images