A testing device

Abstract

The present application discloses a test device, in which the input power supply supplies a first voltage to the component to be tested, and the input power supply supplies a second voltage to the auxiliary component through a transformer. In response to the sum of the voltage generated by the auxiliary component and the second voltage being greater than the first voltage, the protection circuit transmits part of the voltage at the auxiliary component to the component to be tested. By setting the second voltage to be less than the first voltage, the protection circuit avoids transmitting the voltage to the component to be tested as soon as the auxiliary component generates the voltage, thereby affecting the operation of the towing component, thereby improving the safety of the test device. At the same time, the protection circuit is connected to the towing component and the component to be tested, and transmits part of the voltage of the towing component to the component to be tested, thereby improving the utilization rate of the voltage, avoiding the situation in the prior art where a brake resistor is used to release the voltage and waste electrical energy, thereby improving the practicality of the test device and enhancing the user experience of the test device.

Description

Technical Field

[0001] The present application relates to the technical field of driver testing, and in particular to a testing device. Background Art

[0002] During the development and production of servo drives and inverters, load testing requires the use of a pairing platform. Specifically, AC voltage is applied to the drive under test and the pairing drive. The drive under test is connected to the test motor, and the pairing drive is connected to the pairing motor. The shaft ends of the test motor and pairing motor are connected, forming a pairing state. During the test, the drive under test controls the test motor, which in turn drags the pairing motor. Simultaneously, the pairing drive is set to torque mode, driving the pairing motor to output a torque value opposite to the speed of the test motor, thereby achieving controllable torque load testing.

[0003] During the test, when the trailing-end driver drives the trailing-end motor in the reverse direction, the trailing-end motor is in a generating state. At this time, the bus voltage inside the trailing-end driver will continue to rise, necessitating the release of the bus voltage energy to prevent the bus voltage from overvoltage and damaging components. In existing technical solutions, a brake circuit is connected to the bus voltage of the trailing-end driver. When the bus voltage exceeds a certain set value, a control switch is turned on, and the bus voltage energy is released through a brake resistor, ensuring that the bus voltage does not continue to rise.

[0004] However, when the power of the drive under test is high, a large, high-power brake resistor must be selected, and additional heat dissipation for the brake resistor is required, which is costly and takes up a lot of space. At the same time, the energy generated by the trailing motor is dissipated in the form of heat in the brake resistor, resulting in energy waste. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a testing device, which includes an input power supply, a component to be tested, an auxiliary component, a transformer and a protection circuit.

[0006] The input power supply is electrically connected to the component under test, the output shaft of the component under test is connected to the output shaft of the auxiliary component, and the input power supply is connected to the auxiliary component through the transformer; one end of the protection circuit is connected to the component under test, and the other end of the protection circuit is connected to the auxiliary component;

[0007] The input power supply supplies a first voltage to the component under test, and the input power supply supplies a second voltage to the auxiliary component through the transformer, and the first voltage is greater than the second voltage;

[0008] The output shaft of the component at the end to be tested drives the output shaft of the auxiliary end component to move, and the auxiliary end component generates a voltage. In response to the sum of the voltage generated by the auxiliary end component and the second voltage being greater than the first voltage, the protection circuit transmits part of the voltage at the auxiliary end component to the component at the end to be tested.

[0009] Wherein, the test end component includes a test end driver and a test end motor, the auxiliary end component includes an auxiliary end driver and an auxiliary end motor, and the test device further includes a coupling;

[0010] One end of the driver at the end to be tested is electrically connected to the input power supply, and the other end of the driver at the end to be tested is electrically connected to the motor at the end to be tested; one end of the driver at the auxiliary end is electrically connected to the input power supply through the transformer, and the other end of the driver at the auxiliary end is electrically connected to the auxiliary motor; the output shaft of the motor at the end to be tested is connected to the output shaft of the auxiliary motor through the coupling;

[0011] Wherein, the auxiliary end driver is connected to the end driver to be tested through the protection circuit.

[0012] The input power supply supplies the first voltage to the driver at the end to be tested. After receiving the first voltage, the driver at the end to be tested drives the motor at the end to be tested to operate. The output shaft of the motor at the end to be tested acts on the output shaft of the auxiliary motor through the coupling, thereby driving the output shaft of the auxiliary motor to move.

[0013] At the same time, the input power supply supplies the second voltage to the auxiliary end driver through the transformer. After receiving the second voltage, the auxiliary end driver drives the auxiliary end motor to operate to resist the drive of the test end motor.

[0014] Wherein, at a first moment, the operating voltage in the driver to be tested is greater than the operating voltage in the auxiliary driver; wherein, at the first moment, the operating voltage in the driver to be tested is the first voltage, and the operating voltage in the auxiliary driver is the second voltage;

[0015] At the second moment, the operating voltage in the driver under test is lower than the operating voltage in the auxiliary driver, and part of the operating voltage in the auxiliary driver flows into the driver under test via the protection circuit;

[0016] The second moment is later than the first moment.

[0017] Among them, in the time period between the first moment and the second moment, the motor at the test end drives the auxiliary end motor to move, and the auxiliary end motor generates voltage and transmits it to the auxiliary end driver, so that the operating voltage in the auxiliary end driver becomes larger.

[0018] Wherein, the protection circuit includes a diode, the input end of the diode is connected to the auxiliary end component, and the output end of the diode is connected to the end component to be tested.

[0019] The test-end driver includes a first rectifier bridge and a first inverter circuit, and the auxiliary-end driver includes a second rectifier bridge and a second inverter circuit.

[0020] One end of the first rectifier bridge is connected to the input power supply, the other end of the first rectifier bridge is connected to one end of the first inverter circuit, and the other end of the first inverter circuit is connected to the motor to be tested;

[0021] One end of the second rectifier bridge is connected to the input power supply through the transformer, the other end of the second rectifier bridge is connected to one end of the second inverter circuit, and the other end of the second inverter circuit is connected to the auxiliary end motor;

[0022] The input end of the diode is connected to the connection circuit between the second rectifier bridge and the second inverter circuit, and the output end of the diode is connected to the connection circuit between the first rectifier bridge and the first inverter circuit.

[0023] Wherein, the transformer includes a first winding and a second winding,

[0024] The input power supply is connected to the first winding, the auxiliary end component is connected to the second winding, and the number of turns of the first winding is greater than the number of turns of the second winding.

[0025] The testing device further includes a data acquisition module, which is connected to the motor to be tested and is used to collect motion data of the motor to be tested.

[0026] Wherein, the testing device also includes a calculation module, which is connected to the data acquisition module and is used to receive the motion data of the motor to be tested transmitted by the data acquisition module, and obtain the performance parameters of the driver to be tested based on the motion data.

[0027] The beneficial effects of the present application are as follows: Different from the prior art, the test device of the present application includes an input power supply, a component under test, an auxiliary component, a transformer, and a protection circuit. The input power supply is electrically connected to the component under test, the output shaft of the component under test is connected to the output shaft of the auxiliary component, and the input power supply is connected to the auxiliary component via a transformer. One end of the protection circuit is connected to the component under test, and the other end of the protection circuit is connected to the auxiliary component. The input power supply supplies a first voltage to the component under test, and the input power supply supplies a second voltage to the auxiliary component via the transformer. The first voltage is greater than the second voltage. The output shaft of the component under test drives the output shaft of the auxiliary component to move, and the auxiliary component generates a voltage. In response to the sum of the voltage generated by the auxiliary component and the second voltage being greater than the first voltage, the protection circuit transmits a portion of the voltage at the auxiliary component to the component under test. The transformer ensures that the second voltage is less than the first voltage, preventing the protection circuit from transmitting voltage to the component under test as soon as the auxiliary component generates voltage, thereby affecting the operation of the trailing component, thereby improving the safety of the test device. At the same time, the protection circuit is connected to the towing end component and the to-be-tested end component, and part of the voltage of the to-be-tested end component is transmitted to the to-be-tested end component, thereby improving the voltage utilization rate and avoiding the use of a brake resistor to release the voltage in the prior art, thereby wasting electric energy. This improves the practicality of the test device and enhances the user experience of the test device of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] in:

[0030] Figure 1 It is a structural diagram of an embodiment of the testing device provided in this application.

[0031] Figure 1: Test device A; input power supply 1; test end component 2; test end driver 21; first rectifier bridge 211; first inverter circuit 212; test end motor 22; auxiliary end component 3; auxiliary end driver 31; second rectifier bridge 311; second inverter circuit 312; auxiliary end motor 32; transformer 4; first winding S1; second winding S2; protection circuit 5; diode 51; coupling 6. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0033] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0034] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0036] In the prior art, testing the performance of a driver under test typically requires a load test using a towing platform. Specifically, the driver under test is connected to the test-end motor, the towing-end driver is connected to the towing-end motor, and the shaft ends of the test-end motor and the towing-end motor are connected, thus forming a towing state. During the test, the driver under test controls the operation of the test-end motor, which drags the towing-end motor. The towing-end driver also controls the operation of the towing-end motor, thereby applying a reaction force to the towing-end motor. The test-end motor operates under the influence of the driver under test and the towing-end motor. Detecting the operating conditions of the test-end motor can then characterize the function and performance of the driver under test.

[0037] Since the test-end motor drags the pair-end motor to move, the pair-end motor is in a power generation state. At this time, the bus voltage inside the pair-end driver will continue to rise. In order to avoid overvoltage and burnout of components, a brake circuit is generally connected to the bus of the pair-end driver. When the bus voltage in the pair-end driver rises above a certain set value, the switch in the brake circuit is turned on, and the energy of the bus voltage is released through the brake resistor in the brake circuit, ensuring that the bus voltage of the pair-end driver will not continue to rise.

[0038] However, when the power of the drive under test is high, a large, high-power brake resistor must be selected, and additional heat dissipation for the brake resistor is required, which is costly and takes up a lot of space. At the same time, the energy generated by the trailing motor is dissipated in the form of heat in the brake resistor, resulting in energy waste.

[0039] Therefore, the present application provides a test device for testing the performance of the driver, which can fully recycle and utilize the energy generated by the tow-end motor, thereby significantly reducing power loss; at the same time, the braking circuit of the tow-end driver can be eliminated, eliminating the high-power braking resistor and cooling fan, reducing the installation space and volume weight of the system, and reducing costs.

[0040] See also Figure 1 , Figure 1 1 is a schematic diagram of a test device according to an embodiment of the present invention. The test device A according to the present invention comprises an input power supply 1, a component under test 2, an auxiliary component 3, a transformer 4 and a protection circuit 5.

[0041] The input power supply 1 is electrically connected to the component under test 2, the output shaft of the component under test 2 is connected to the output shaft of the auxiliary end component 3, the input power supply 1 is connected to the auxiliary end component 3 through the transformer 4, one end of the protection circuit 5 is connected to the component under test 2, and the other end of the protection circuit 5 is connected to the auxiliary end component 3.

[0042] The input power supply 1 supplies a first voltage to the component under test 2 , and the input power supply 1 supplies a second voltage to the auxiliary component 3 through the transformer 4 , and the first voltage is greater than the second voltage.

[0043] During the test of the end component 2 to be tested in the test device A, the output shaft of the end component 2 to be tested drives the output shaft of the auxiliary end component 3 to move, and the auxiliary end component 3 generates a voltage. In response to the sum of the voltage generated by the auxiliary end component 3 and the second voltage being greater than the first voltage, the protection circuit 5 transmits part of the voltage at the auxiliary end component 3 to the end component 2 to be tested.

[0044] Specifically, after the component 2 at the tested end receives the first voltage, the output shaft of the component 2 at the tested end moves, and since the output shaft of the auxiliary end component 3 is connected to it, the output shaft of the component 2 at the tested end can drive the output shaft of the auxiliary end component 3 to move. As mentioned above, at this time, the auxiliary end component 3 is in a power generation state, and the voltage generated by the auxiliary end component 3 will cause the bus voltage inside the auxiliary end component 3 to rise. Therefore, when the bus voltage inside the auxiliary end component 3 is overvoltage, the bus voltage inside the auxiliary end component 3 is released.

[0045] In this embodiment, when the sum of the voltage generated by auxiliary-end assembly 3 and the second voltage transmitted by input power source 1 received by auxiliary-end assembly 3 is greater than the first voltage, auxiliary-end assembly 3 is determined to be overvoltage. Protection circuit 5 then transmits a portion of the voltage at auxiliary-end assembly 3 to test-end assembly 2. Test-end assembly 2 can then utilize this partial voltage for operation while maintaining the bus voltage within auxiliary-end assembly 3 at a constant voltage. This fully recycles the energy generated by auxiliary-end assembly 3 and significantly reduces power loss. Furthermore, the presence of protection circuit 5 eliminates the brake circuit used in prior art, eliminating the need for a high-power brake resistor and the components required to dissipate heat from the brake resistor. This reduces the installation space, volume, and weight of test device A, thereby lowering costs.

[0046] Furthermore, due to the presence of the transformer 4, the first voltage delivered by the input power supply 1 to the test end component 2 is greater than the second voltage delivered by the input power supply 1 to the auxiliary end component 3. It can be understood that when the voltage generated by the auxiliary end component 3 is the difference between the first voltage and the second voltage, the bus voltage of the auxiliary end component 3 needs to be released to avoid voltage overvoltage.

[0047] Therefore, the present application proposes that the first voltage is greater than the second voltage to prevent the auxiliary end component 3 from being in a power generation state at the beginning, and the protection circuit 5 transmits part of the voltage at the auxiliary end component 3 to the end component 2 to be tested, affecting the operation of the auxiliary end component 3, thereby affecting the test efficiency of the test device A on the end component 2 to be tested.

[0048] Optionally, the protection circuit 5 may include a diode 51, the input end of the diode 51 being connected to the auxiliary-end component 3, and the output end of the diode 51 being connected to the end component 2 to be tested. When the sum of the voltage generated by the auxiliary-end component 3 and the second voltage is greater than the first voltage, that is, when the circuit in which the diode 51 is located is connected, the excess voltage at the auxiliary-end component 3 will enter the end component 2 to be tested through the diode 51. By providing the diode 51, when the voltage in the auxiliary-end component 3 is greater than the voltage in the end component 2 to be tested, the voltage in the auxiliary-end component 3 will immediately enter the end component 2 to be tested through the diode 51, resulting in a rapid response and preventing overvoltage in the auxiliary-end component 3.

[0049] In one embodiment, if the first voltage is equal to the second voltage, as soon as the auxiliary-end component 3 is in the power generation state, the protection circuit 5 where the diode 51 is located will immediately conduct, transmitting part of the voltage in the auxiliary-end component 3 to the test-end component 2, affecting the operation of the auxiliary-end component 3. Furthermore, it can be considered that the protection circuit 5 is constantly transmitting voltage throughout the operation of the test device A, increasing the wear on the protection circuit 5 and affecting the stability of the test device A.

[0050] In another embodiment, if the first voltage is less than the second voltage, when the input power supply 1 transmits the second voltage to the auxiliary end component 3, the protection circuit 5 is immediately turned on, and part of the voltage in the auxiliary end component 3 is transmitted to the end component 2 to be tested. At this time, the auxiliary end component 3 may not be able to operate normally due to not receiving sufficient operating voltage, thereby reducing the test efficiency of the test device A on the end component 2 to be tested.

[0051] Therefore, an embodiment of the present application proposes that the first voltage delivered by the input power supply 1 to the component to be tested 2 is greater than the second voltage delivered by the input power supply 1 to the auxiliary component 3, thereby improving the practicality and stability of the test device A, improving the testing efficiency of the test device A on the component to be tested 2, and further improving the user's experience of using the test device A.

[0052] Optionally, the transformer 4 includes a first winding S1 and a second winding S2, the input power supply 1 is connected to the first winding S1, the auxiliary end component 3 is connected to the second winding S2, and the number of turns of the first winding S1 is greater than that of the second winding S2.

[0053] Among them, since the component 2 to be tested is connected to the input power supply 1, and the first winding S1 is also connected to the input power supply 1, the voltage value of the input voltage of the input power supply 1 to the first winding S1 of the transformer 4 is equal to the first voltage. Since the number of turns of the transformer 4 determines the relationship between the input voltage and the output voltage in the transformer 4, in order to ensure that the first voltage is greater than the second voltage, the number of turns of the first winding S1 is set to be greater than the number of turns of the second winding S2 in the embodiment of the present application, thereby ensuring that the first voltage transmitted by the input power supply 1 to the component to be tested 2 is greater than the second voltage transmitted by the input power supply 1 to the auxiliary end component 3, thereby ensuring the stability of the test device A during the testing process of the component to be tested 2.

[0054] Optionally, the test end component 2 includes a test end driver 21 and a test end motor 22 , the auxiliary end component 3 includes an auxiliary end driver 31 and an auxiliary end motor 32 , and the test device A further includes a coupling 6 .

[0055] Among them, one end of the test end driver 21 is electrically connected to the input power supply 1, and the other end of the test end driver 21 is electrically connected to the test end motor 22; one end of the auxiliary end driver 31 is electrically connected to the input power supply 1 through the transformer 4, and the other end of the auxiliary end driver 31 is electrically connected to the auxiliary end motor 32; the output shaft of the test end motor 22 is connected to the output shaft of the auxiliary end motor 32 through the coupling 6, and the auxiliary end driver 31 is connected to the test end driver 21 through the protection circuit 5.

[0056] Furthermore, the input power supply 1 can supply a first voltage to the test-end driver 21. After receiving the first voltage, the test-end driver 21 drives the test-end motor 22 to move. The output shaft of the test-end motor 22 acts on the output shaft of the auxiliary-end motor 32 through the coupling 6, driving the output shaft of the auxiliary-end motor 32 to move. At the same time, the input power supply 1 can also supply a second voltage to the auxiliary-end driver 31 through the transformer 4. After receiving the second voltage, the auxiliary-end driver 31 drives the auxiliary-end motor 32 to operate, thereby resisting the drive of the test-end motor 22.

[0057] It is understandable that, because the first voltage is greater than the second voltage, the power of the test-end motor 22 is greater than the power of the auxiliary-end motor 32. Therefore, even if the auxiliary-end driver 31 drives the auxiliary-end motor 32 to resist the drive of the test-end motor 22, the auxiliary-end motor 32 can only resist a portion of the movement of the test-end motor 22. In the overall movement, it is still the output shaft of the test-end motor 22 that drives the output shaft of the auxiliary-end motor 32. The auxiliary-end motor 32 is in a power generation state, and as described above, the bus voltage of the auxiliary-end driver 31 will increase during the operation of the auxiliary-end motor 32.

[0058] The following briefly describes the operating process of test device A:

[0059] At the first moment, the input power supply 1 supplies a first voltage to the test-end driver 21 and a second voltage to the auxiliary-end driver 31. That is, at this time, the operating voltage in the test-end driver 21 is the first voltage, and the operating voltage in the auxiliary-end driver 31 is the second voltage. The operating voltage in the test-end driver 21 is greater than the operating voltage in the auxiliary-end driver 31.

[0060] As the test device A operates, the output shaft of the test-end motor 22 drives the output shaft of the auxiliary-end motor 32 to move. The operating voltage of the auxiliary-end driver 31 can be expressed as the sum of the second voltage and the voltage generated by the auxiliary-end motor 32. Furthermore, as the time for which the output shaft of the test-end motor 22 drives the output shaft of the auxiliary-end motor 32 to move increases, the voltage generated by the auxiliary-end motor 32 accumulates, until at a second moment, the sum of the voltage generated by the auxiliary-end motor 32 and the second voltage is greater than the first voltage.

[0061] That is, at the second moment, the operating voltage of the test-end driver 21 is lower than the operating voltage of the auxiliary-end driver 31. Then, part of the operating voltage of the auxiliary-end driver 31 flows into the test-end driver 21 via the protection circuit 5. This prevents the bus voltage in the auxiliary-end driver 31 from overvoltage and burns out the auxiliary-end driver 31, thereby improving the safety of the test device A. The second moment is later than the first moment.

[0062] As mentioned above, the protection circuit 5 may include a diode 51. When the operating voltage of the auxiliary end driver 31 is greater than the operating voltage of the end driver 21 to be tested, the protection circuit 5 is turned on to transmit part of the operating voltage in the auxiliary end driver 31 to the end driver 21 to be tested.

[0063] In one embodiment, the protection circuit 5 may also include a switching device (not shown), and the auxiliary end driver 31 may be connected to a voltage detector. The test device A also includes a control unit (not shown), which is connected to the switching device and the voltage detector. The voltage detector then detects the operating voltage in the auxiliary end driver 31 and transmits the detected voltage data to the control unit. A threshold value may be pre-set in the control unit. The size of the threshold value may be equal to the voltage value of the first voltage. The control unit then receives the voltage data transmitted by the voltage detector and compares the voltage data with the threshold value. When the control unit responds to the operating voltage of the auxiliary end driver 31 being greater than the threshold value, the switching device is controlled to close (when the test device A starts to run, the switching device is in the disconnected state and the protection circuit 5 is not turned on), and the protection circuit 5 is turned on to transmit part of the operating voltage in the auxiliary end driver 31 to the end driver 21 to be tested.

[0064] Compared with the protection circuit 5 including the diode 51, the control unit in the above embodiment has a longer response time to the operating voltage overvoltage in the auxiliary end driver 31. Therefore, in this application, it is preferred that the protection circuit 5 includes the diode 51 to improve the response efficiency to the operating voltage overvoltage in the auxiliary end driver 31.

[0065] In summary, in the time period between the first moment and the second moment, the motor 22 at the test end drives the auxiliary end motor 32 to move, and the auxiliary end motor 32 generates voltage and transmits it to the auxiliary end driver 31, so that the operating voltage in the auxiliary end driver 31 becomes larger. When the operating voltage in the auxiliary end driver 31 is greater than the operating voltage of the driver 21 at the test end, the protection circuit 5 transmits part of the voltage of the auxiliary end driver 31 to the driver 21 at the test end, eliminating the wasteful form of consuming voltage by the brake motor in the prior art, realizing the full recycling of the energy generated by the auxiliary end component 3, and greatly reducing the power loss.

[0066] Optionally, the test-end driver 21 includes a first rectifier bridge 211 and a first inverter circuit 212 , and the auxiliary-end driver 31 includes a second rectifier bridge 311 and a second inverter circuit 312 .

[0067] One end of the first rectifier bridge 211 is connected to the input power supply 1, the other end of the first rectifier bridge 211 is connected to the first inverter circuit 212, and the other end of the first inverter circuit 212 is connected to the motor under test 22. The first rectifier bridge 211 is used to convert the AC power input from the input power supply 1 into DC power to power the circuits within the driver under test 21, while the first inverter circuit 212 is used to convert the DC power output from the first rectifier bridge 211 into adjustable AC power for output to the motor under test 22, powering the motor under test 22 and controlling its operation.

[0068] One end of the second rectifier bridge 311 is connected to the input power supply 1 via the transformer 4. The other end of the second rectifier bridge 311 is connected to one end of the second inverter circuit 312. The other end of the second inverter circuit 312 is connected to the auxiliary-end motor 32. The second rectifier bridge 311 is used to convert the AC power input from the input power supply 1 into DC power to power the circuits within the auxiliary-end driver 31. The second inverter circuit 312 is used to convert the DC power output from the second rectifier bridge 311 into adjustable AC power for output to the auxiliary-end motor 32, powering the auxiliary-end motor 32 and controlling its operation.

[0069] Among them, the input end of the diode 51 is connected to the connection circuit between the second rectifier bridge 311 and the second inverter circuit 312, and the output end of the diode 51 is connected to the connection circuit between the first rectifier bridge 211 and the first inverter circuit 212. When the operating voltage of the auxiliary end driver 31 is greater than the operating voltage of the end driver 21 to be tested, part of the voltage in the auxiliary end driver 31 enters the end driver to be tested 21 through the diode, supplying power to the end driver to be tested 21, thereby improving the utilization rate of electric energy in the test device A.

[0070] Optionally, the testing device A further includes a data acquisition module (not shown), which is connected to the motor 22 at the test end and is used to acquire motion data of the motor 22 at the test end.

[0071] Optionally, the test device A also includes a computing module (not shown), which is connected to the data acquisition module and is used to receive the motion data of the motor 22 to be tested transmitted by the data acquisition module, and obtain the performance parameters of the driver 21 to be tested based on the motion data of the motor to be tested.

[0072] In one embodiment, the test device A may further include a display module, which is connected to the calculation module and is used to display the performance parameters of the test end driver 21 obtained by the calculation module, thereby improving the visibility of the test results of the test device A and enhancing the user experience of the test device A.

[0073] In summary, in the test device A provided in the embodiment of the present application, the auxiliary end driver 31 is connected to the input power supply 1 through the transformer 4, and the number of turns of the first winding S1 of the transformer 4 is greater than the number of turns of the second winding S2 of the transformer 4, ensuring that the first voltage delivered by the input power supply 1 to the test end driver 21 is greater than the second voltage delivered by the input power supply 1 to the auxiliary end driver 31, thereby ensuring the stability of the operation of the test device A.

[0074] At the same time, a protection circuit 5 is added to the test device A. One end of the protection circuit 5 is connected to the auxiliary-end driver 31, and the other end is connected to the test-end driver 21. When the operating voltage in the auxiliary-end driver 31 is greater than the operating voltage in the test-end driver 21, part of the voltage in the auxiliary-end driver 31 can be transmitted to the test-end driver 21 through the diode 51 in the protection circuit 5 to facilitate the operation of the test-end driver 21, thereby improving the power utilization rate of the test device A. While maintaining the operating voltage of the auxiliary-end driver 31 from being over-voltage, the energy generated by the auxiliary-end motor 32 is fully recovered and utilized, significantly reducing power loss. At the same time, the brake circuit in the prior art is eliminated, eliminating the high-power brake resistor and the device for dissipating heat from the brake resistor. This reduces the installation space, volume and weight of the test device A, reduces costs, and improves the user experience of the test device A.

[0075] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A testing device, characterized in that: The test device includes an input power supply, a test end component, an auxiliary end component, a transformer and a protection circuit. The input power supply is electrically connected to the component under test, the output shaft of the component under test is connected to the output shaft of the auxiliary component, and the input power supply is connected to the auxiliary component through the transformer; one end of the protection circuit is connected to the component under test, and the other end of the protection circuit is connected to the auxiliary component; The input power supply supplies a first voltage to the component under test, and the input power supply supplies a second voltage to the auxiliary component through the transformer, and the first voltage is greater than the second voltage; The output shaft of the component at the end to be tested drives the output shaft of the auxiliary end component to move, and the auxiliary end component generates a voltage. In response to the sum of the voltage generated by the auxiliary end component and the second voltage being greater than the first voltage, the protection circuit transmits part of the voltage at the auxiliary end component to the component at the end to be tested.

2. The testing device according to claim 1, wherein: The test end assembly includes a test end driver and a test end motor, the auxiliary end assembly includes an auxiliary end driver and an auxiliary end motor, and the testing device further includes a coupling; One end of the driver at the end to be tested is electrically connected to the input power supply, and the other end of the driver at the end to be tested is electrically connected to the motor at the end to be tested; one end of the driver at the auxiliary end is electrically connected to the input power supply through the transformer, and the other end of the driver at the auxiliary end is electrically connected to the auxiliary motor; The output shaft of the motor at the end to be tested is connected to the output shaft of the motor at the auxiliary end through the coupling; Wherein, the auxiliary end driver is connected to the end driver to be tested through the protection circuit.

3. The testing device according to claim 2, characterized in that The input power supply supplies the first voltage to the driver at the end to be tested. After receiving the first voltage, the driver at the end to be tested drives the motor at the end to be tested to operate. The output shaft of the motor at the end to be tested acts on the output shaft of the auxiliary motor through the coupling, thereby driving the output shaft of the auxiliary motor to move. At the same time, the input power supply supplies the second voltage to the auxiliary end driver through the transformer. After receiving the second voltage, the auxiliary end driver drives the auxiliary end motor to operate to resist the drive of the test end motor.

4. The testing device according to claim 3, characterized in that: At a first moment, the operating voltage in the driver under test is greater than the operating voltage in the auxiliary driver; wherein, at the first moment, the operating voltage in the driver under test is the first voltage, and the operating voltage in the auxiliary driver is the second voltage; At the second moment, the operating voltage in the driver under test is lower than the operating voltage in the auxiliary driver, and part of the operating voltage in the auxiliary driver flows into the driver under test via the protection circuit; The second moment is later than the first moment.

5. The testing device according to claim 4, characterized in that: During the time period between the first moment and the second moment, the motor at the test end drives the auxiliary end motor to move, and the auxiliary end motor generates voltage and transmits it to the auxiliary end driver, so that the operating voltage in the auxiliary end driver becomes larger.

6. The testing device according to claim 2, characterized in that: The protection circuit includes a diode, an input end of the diode is connected to the auxiliary end component, and an output end of the diode is connected to the end component to be tested.

7. The testing device according to claim 6, characterized in that: The test end driver includes a first rectifier bridge and a first inverter circuit, and the auxiliary end driver includes a second rectifier bridge and a second inverter circuit. One end of the first rectifier bridge is connected to the input power supply, the other end of the first rectifier bridge is connected to one end of the first inverter circuit, and the other end of the first inverter circuit is connected to the motor to be tested; One end of the second rectifier bridge is connected to the input power supply through the transformer, the other end of the second rectifier bridge is connected to one end of the second inverter circuit, and the other end of the second inverter circuit is connected to the auxiliary end motor; The input end of the diode is connected to the connection circuit between the second rectifier bridge and the second inverter circuit, and the output end of the diode is connected to the connection circuit between the first rectifier bridge and the first inverter circuit.

8. The testing device according to claim 1, wherein: The transformer comprises a first winding and a second winding, The input power supply is connected to the first winding, the auxiliary end component is connected to the second winding, and the number of turns of the first winding is greater than the number of turns of the second winding.

9. The testing device according to claim 2, characterized in that: The testing device further includes a data acquisition module, which is connected to the motor to be tested and is used to collect motion data of the motor to be tested.

10. The testing device according to claim 9, characterized in that: The testing device also includes a calculation module, which is connected to the data acquisition module and is used to receive the motion data of the motor to be tested transmitted by the data acquisition module, and obtain performance parameters of the driver to be tested based on the motion data.

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