Power device test equipment

Abstract

The utility model relates to power device testing equipment, which is characterized in that the power device testing equipment comprises a monitoring platform, a testing platform, a main control board, a motor, a capacitor and a driving board used for being connected with a to-be-tested power device; the monitoring platform and the test platform are adjacently arranged and are connected with each other; the capacitor and the driving board are adjacently arranged at the top of the test board, a supporting piece is further arranged at the top of the test board, the driving board is placed on the supporting piece, and the driving board is suitable for placing a to-be-tested power device; the main control board and the host are both arranged in the cavity of the monitoring station, and the output end of the main control board is electrically connected with the input end of the driving board so as to output a control signal to the to-be-tested power device through the driving board; the motor is arranged in the cavity of the test board, the motor is electrically connected with the output end of the driving board so as to be driven by a to-be-tested power device on the driving board, and the motor is electrically connected with the main control board so as to feed back a rotating speed signal to the main control board; the main control board is electrically connected with the host to transmit the rotating speed signal to the host.

Description

Technical Field

[0001] This application relates to the field of power device testing, and more particularly to a power device testing device. Background Technology

[0002] As a type of semiconductor switch, the IGBT is a core component for energy conversion and transmission. In new energy vehicles, the IGBT is responsible for AC-DC conversion, turning DC current into AC current to supply the motor and enable the motor to generate torque.

[0003] Currently, for any IGBT power device, a double-pulse test is conducted before it leaves the factory to check its performance and determine whether the product's performance meets the corresponding requirements. However, judging whether an IGBT can drive a motor solely based on the waveform parameters obtained from the double-pulse test is not convincing. Therefore, this application proposes a power device testing device suitable for detecting whether an IGBT power device can drive a motor. Summary of the Invention

[0004] In view of this, this application proposes a power device testing device.

[0005] According to one aspect of this application, a power device testing device is provided, comprising: a monitoring station, a test station, a main control board, a motor, a capacitor, and a drive board for connecting to the power device under test; the monitoring station and the test station are arranged adjacent to each other and interconnected; the capacitor and the drive board are arranged adjacent to each other on the top of the test station, and the top of the test station is also provided with a support member, the drive board is placed on the support member, and the drive board is suitable for placing the power device under test; the main control board and the host are both arranged inside the cavity of the monitoring station, and the output terminal of the main control board is electrically connected to the input terminal of the drive board to output control signals to the power device under test through the drive board;

[0006] The motor is located inside the cavity of the test bench. The motor is electrically connected to the output of the drive board to be driven by the power device under test on the drive board, and the motor is also electrically connected to the main control board to feed back the speed signal to the main control board. The main control board is electrically connected to the host to transmit the speed signal to the host.

[0007] In one possible approach, an inductor is also included; the inductor is located inside the cavity of the test bench, and the output of the drive board is electrically connected to the motor through the inductor.

[0008] In one possible configuration, the monitoring station includes: a first frame and a housing, the first frame being disposed within a cavity of the housing for supporting the housing.

[0009] In one possible configuration, the monitoring station is equipped with a display screen mounted on the side wall of the housing, and the display screen is electrically connected to the main unit.

[0010] One possible approach also includes: a low-voltage power supply; the low-voltage power supply is located inside the cavity of the monitoring console, and is electrically connected to the main control board to provide operating voltage to the main control board.

[0011] In one possible configuration, the monitoring station is equipped with a shielding plate, and the low-voltage power supply is mounted adjacent to the main control board on the shielding plate.

[0012] In one possible configuration, the monitoring station is equipped with a relay mounting plate suitable for supporting relays with high-voltage power supply, and both the shielding plate and the relay mounting plate are placed horizontally.

[0013] In one possible configuration, the test stand includes: a second frame, a placement plate, a base plate, and three side plates;

[0014] The placement plate and the base plate are respectively set on the upper and lower sides of the second frame, and the three side plates are set on the three sides of the second frame.

[0015] In one possible configuration, a three-phase aviation connector is provided on the side wall of the monitoring console. One end of the three-phase aviation connector is electrically connected to the drive board, and the other end of the three-phase aviation connector is electrically connected to the motor via an inductor.

[0016] In one possible approach, the plate has two or more heat dissipation holes arranged in an array.

[0017] Beneficial effects: The monitoring station is suitable for providing a platform for data monitoring when power devices under test are being tested; the test station is suitable for placing power devices and capacitors under test, and provides installation space for inductors and motors. The output of the main control board is electrically connected to the input of the drive board. The power device under test (DUT) is mounted on the drive board to connect it to the drive board. The main control board outputs control signals to the DUT through the circuitry on the drive board. The input of the capacitor is electrically connected to an external high-voltage power supply, and the output of the capacitor is electrically connected to the drive board. This capacitor is used to filter the DC voltage from the external high-voltage power supply and then output it to the DUT through the circuitry on the drive board. The DUT is used to convert DC power into AC power required by the motor. The input of the inductor is electrically connected to the output of the DUT through the circuitry on the drive board. The output of the inductor is electrically connected to the motor. The DUT outputs AC power to the motor through the inductor. The DUT drives the motor according to the drive signals from the main control board. The output of the motor is electrically connected to the input of the main control board to provide feedback on speed and angle signals. The output of the main control board is electrically connected to the host computer. The host computer is used to monitor the speed data of the motor during operation. The operator can use the relevant data to determine whether the DUT can drive the motor.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 An exploded view of the power device testing equipment according to an embodiment of this application is shown;

[0021] Figure 2 This diagram shows the main structure of a power device testing device according to an embodiment of this application.

[0022] Figure 3 This diagram shows the main structure of a power device testing device according to an embodiment of this application.

[0023] Figure 4 A partial structural diagram of a power device testing apparatus according to an embodiment of this application is shown;

[0024] Figure 5 A partial structural diagram of a power device testing apparatus according to an embodiment of this application is shown;

[0025] Figure 6 A partial structural diagram of a power device testing apparatus according to an embodiment of this application is shown;

[0026] Figure 7 A partial enlarged view of the power device testing equipment according to an embodiment of this application is shown;

[0027] Figure 8 A partial enlarged view of the power device testing equipment according to an embodiment of this application is shown;

[0028] Figure 9 This diagram shows the main structure of a power device testing device according to an embodiment of this application.

[0029] Figure 10 The circuit diagram of the power devices and driver board is shown;

[0030] Figure 11 This diagram illustrates the driving principle of a power device testing device according to an embodiment of this application. Detailed Implementation

[0031] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0035] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0036] like Figure 1 As shown, this power device testing equipment includes: a monitoring station, a testing station, a main control board 300 for connecting to the power device 800 under test, a motor 700, a capacitor 500, and an inductor 600; the monitoring station and the testing station are arranged adjacent to each other and connected to each other; the capacitor 500 is located on the top of the testing station, and the top of the testing station is also provided with a support member 810, which is suitable for placing the power device 800 under test; the main control board 300 and the host 230 are both located inside the cavity of the monitoring station, and the output terminal of the main control board 300 is connected to the drive... The input terminal of the board is electrically connected to output control signals to the power device under test 800 via the drive board. The inductor 600 and the motor 700 are both located inside the cavity of the test bench. The motor 700 is electrically connected to the output terminal of the drive board to be driven by the power device under test on the drive board, and the motor 700 is electrically connected to the main control board 300 to feed back the speed signal to the main control board 300. The main control board 300 is electrically connected to the host 230 to transmit the speed signal to the host 230. The bottom of the monitoring station and the bottom of the test bench are both equipped with two or more wheels 260.

[0037] It should be noted that the monitoring station is suitable for providing a platform for data monitoring during the testing of the power device 800; the test station is suitable for placing the power device 800 and capacitor 500 under test, and provides installation space for inductor 600 and motor 700. The adjacent placement of the monitoring station and test station facilitates the routing of wiring between the devices. The interior of the test station provides independent placement space for inductor 600 and motor 700, isolating and protecting the inductor 600 internally to prevent external environmental interference with their normal operation. In summary, this application has a compact overall structure, providing a testing platform for power device testing and improving testing safety, effectively preventing electrical accidents during testing. Simultaneously, this application effectively reduces electromagnetic interference, is stable and reliable, has a compact and simple structure, effectively improves energy utilization, saves equipment space, and maximizes time and space cost savings; it also further improves production and living efficiency.

[0038] like Figure 11 As shown, the power device under test 800 is suitable for mounting on the driver board 820 to electrically connect the power device under test 800 to the drive circuit on the driver board 820. The output terminal of the main control board 300 is electrically connected to the first input terminal of the driver board 820 to output control signals to the power device under test 800 through the driver board 820. The input terminal of the capacitor 500 is electrically connected to the external high-voltage power supply, and the output terminal of the capacitor 500 is electrically connected to the second input terminal of the driver board 820. It is suitable for filtering the DC voltage of the external high-voltage power supply and outputting it to the power device under test 800 through the circuit on the driver board 820. The power device under test 800 is suitable for converting DC power into AC power required by the drive motor 700. The input terminal of the inductor 600 is connected to the driver board 820. The output terminal of the inductor 600 is electrically connected to the AC power generated by the power device under test 800 through the circuit on the driver board 820. The output terminal of the inductor 600 is electrically connected to the motor 700 so that the power device under test 800 outputs AC power to the motor 700 through the inductor 600. At the same time, the power device under test 800 drives the motor 700 to work according to the drive signal of the main control board 300. The output terminal of the motor 700 is electrically connected to the input terminal of the main control board 300 to feed back speed and angle signals to the main control board 300. The output terminal of the main control board 300 is electrically connected to the host 230. The host 230 is used to monitor the speed data of the motor 700 during operation. The operator can judge whether the power device under test 800 can drive the motor 700 to run based on the relevant data.

[0039] It should be noted that the output terminal of the main control board 300 is connected to the first input terminal of the driver board 820, the output terminal of the capacitor 500 is connected to the second input terminal of the driver board 820, the output terminal of the driver board 820 is connected to the input terminal of the inductor 600, the output terminal of the motor 700 is connected to the input terminal of the main control board 300, and the main control board 300 is connected to the host 230. Before testing, simply install the power device 800 to be tested on the driver board 820.

[0040] In one possible implementation, the monitoring console includes: a first frame 100 and a housing, the first frame 100 being disposed within a cavity of the housing to support the housing. Further, as... Figure 4 As shown, the first frame 100 includes an upper frame 120 and a lower frame 130. The upper frame 120 is located above the lower frame 130 and is fixedly connected to the lower frame 130. The upper frame 120 has a cuboid frame structure. The overall length of the lower frame 130 is the same as the length of the upper frame 120, but the width of the lower frame 130 is greater than the width of the upper frame 120.

[0041] Furthermore, the housing includes: an upper shell 200, a front baffle 240, a rear baffle 280, two side plates 270, a bottom plate 250, and a tabletop 160. For example... Figure 2 As shown, the shape of the upper shell 200 matches the shape of the upper frame 120, and the upper shell 200 is fastened to the upper frame 120; as Figure 1 As shown, the front baffle 240 covers the front side of the lower frame 130, and the rear baffle 280 covers the rear side of the lower frame 130; as Figure 2 As shown, the two side panels 270 respectively cover both sides of the lower frame 130; as Figure 4 As shown, the base plate 250 covers the bottom of the lower frame 130; as Figure 3 As shown, the tabletop 160 covers the top of the lower frame 130 and is suitable for placing devices such as keyboards and mice; preferably, the upper shell 200, front baffle 240, rear baffle 280, two side panels 270, bottom plate 250, tabletop 160 and the first frame 100 are all fixed by bolts.

[0042] In one possible implementation, such as Figure 1 As shown, the monitoring station is also equipped with a drawer 110; the drawer 110 is located in the groove of the front baffle 240 and below the tabletop 160; office supplies can be placed in the drawer 110.

[0043] In one possible implementation, the monitoring station includes a rectangular shielding plate 400, on which both the low-voltage power supply 410 and the main unit 230 are placed. Further, such as... Figure 4As shown, the shielding plate 400 is horizontally placed inside the housing, and is located at the connection between the upper frame 120 and the lower frame 130. The shielding plate 400 divides the interior of the housing into upper and lower spaces. The shielding plate 400 is suitable for housing the main unit 230, the main control board 300, and the low-voltage power supply 410. Furthermore, a rectangular wire-passing hole is provided on one side of the shielding plate 400, suitable for passing wires between the motor 700 and the main control board 300.

[0044] In one possible implementation, such as Figure 1 and Figure 4 As shown, the main control board 300, low-voltage power supply 410, and host 230 are arranged sequentially on the shielding plate 400, with the main control board 300 covered by a main control board protective cover 310, and the low-voltage power supply 410 covered by a low-voltage power supply protective cover 411. The main control board protective cover 310 and the low-voltage power supply protective cover 411 can prevent signal interference between the main control board 300 and the low-voltage power supply 410, and at the same time isolate and protect the internal equipment.

[0045] Furthermore, it also includes: two or more limiting components 231, such as Figure 4 As shown, the main body of the limiting member 231 is an L-shaped plate structure. One side of the limiting member 231 is fixedly connected to the shielding plate 400, and the other side of the limiting member 231 contacts the host 230. Furthermore, there are four limiting members 231, which are located on the four sides of the host 230. Under the limiting action of the four limiting members 231, the host 230 can be stably placed on the shielding plate 400.

[0046] In one possible implementation, the monitoring station is equipped with a display screen 210, which is mounted on the side wall of the upper housing 200. The display screen 210 is electrically connected to the host 230 and is suitable for receiving and displaying motor speed and motor angle data transmitted by the host 230.

[0047] Furthermore, the display screen 210 is model number 215LM00041. The display screen 210 is suitable for displaying the speed data and angle data of the motor 700. The operator can obtain the working condition of the motor 700 driven by the power device under test 800 through the information displayed on the display screen 210, and determine whether the power device under test 800 can drive the motor 700 to work normally.

[0048] In one possible implementation, a low-voltage power supply 410 is also included; the low-voltage power supply 410 is located inside the cavity of the monitoring station, and the low-voltage power supply 410 is electrically connected to the main control board 300 to supply power to the main control board 300.

[0049] In one possible implementation, such as Figure 1As shown, the monitoring console contains a relay 420 and a relay mounting plate 430. The relay mounting plate 430 is located within the lower frame 130, and the relay 420 is placed on the relay mounting plate 430. Both the shielding plate 400 and the relay mounting plate 430 are placed horizontally. Figure 4 As shown, the main body of the relay mounting plate 430 is a rectangular plate structure. The two sides of the relay mounting plate 430 are fixedly connected to the lower frame 130 by screws to ensure that the relay mounting plate 430 is placed horizontally inside the lower frame 130.

[0050] Furthermore, it also includes a relay protective housing 421, the main body of which is a rectangular shell structure, with the relay 420 fastened to the open end.

[0051] In one possible implementation, such as Figure 3 and Figure 4 As shown, the test bench includes: a second frame 910, a placement plate 900, a second base plate 920, and three second side plates 930; the placement plate 900 and the second base plate 920 are respectively disposed on the upper and lower sides of the second frame 910, and the three second side plates 930 surround the three sides of the second frame 910. Figure 4 As shown, the main body of the test bench has a cuboid structure. The second frame 910 consists of two vertical rods. One side of the placement plate 900 is fastened to the top surface of the second frame 910, and the other side of the placement plate 900 is clamped to the side of the lower frame 130, thereby connecting the test bench and the monitoring station and keeping the placement plate 900 horizontal. A capacitor 500 and a support member 810 are placed on the placement plate 900; as... Figure 8 As shown, the two lugs of the support member 810 are fixedly connected to the placement plate 900 by bolts. The capacitor 500 is located beside the support member 810, and the top of the support member 810 is suitable for placing the drive board 820 and the power device 800 under test. The motor 700 and inductor 600 are located inside the cavity of the test bench, and the second base plate 920 at the bottom of the second frame 910 is suitable for supporting the motor 700 and inductor 600. Figure 6 As shown, the placement plate 900 has a clearance hole 940, which is suitable for making way for the wires between the inductor 600 and the drive board 820.

[0052] In one possible implementation, the placement plate 900 has multiple heat dissipation holes arranged in an array to allow hot air inside the test bench to flow out in a timely manner, thus achieving effective protection without affecting the heat dissipation of the motor 700.

[0053] In one possible implementation, such as Figure 9As shown, the rear panel 280 of the monitoring console is equipped with a second positive and negative terminal block. The input terminal of the second positive and negative terminal block is suitable for electrical connection with an external high-voltage power supply, and the output terminal of the second positive and negative terminal block is electrically connected to a relay 420. Figure 4 As shown, a first positive and negative terminal block 150 is provided on the side wall of the monitoring console. The input terminal of the first positive and negative terminal block 150 is electrically connected to the relay 420. The output terminal of the first positive and negative terminal block 150 is electrically connected to the input terminal of the capacitor 500, thereby providing DC voltage to the power device 800 under test through the capacitor 500.

[0054] In one possible implementation, such as Figure 8 As shown, a three-phase aviation connector 140 is provided on the side wall of the monitoring console. The output end of the drive board 820 is electrically connected to the input end of the motor 700 through the three-phase aviation connector 140. The power device under test converts the DC power from the capacitor 500 into AC power and outputs it to the three-phase aviation connector 140. The output end of the three-phase aviation connector 140 is electrically connected to the inductor 600. The inductor 600 is electrically connected to the stator core of the motor 700, which is suitable for outputting AC power to the motor 700 through the inductor 600.

[0055] In one possible implementation, such as Figure 7 As shown, the housing is equipped with a main switch button 211. An external 220V power supply is electrically connected to the main unit 230 and the display screen 210 through the main switch button 211, thereby providing working power to the main unit 230 and the display screen 210.

[0056] In one possible implementation, an emergency stop button 212 is provided on the housing. The emergency stop button 212 is electrically connected to a relay 420. In an emergency, the relay 420 is disconnected to cut off the electrical transmission between the external high-voltage power supply and the power device under test 800, thus protecting the equipment and personal safety.

[0057] In one possible implementation, a power button 215 is provided on the housing. The power button 215 is electrically connected to the main unit 230 and the display screen 210. When both the main switch button 211 and the power button 215 are powered on, the main unit 230, the display screen 210 and other electrical devices are powered on. When the power is turned off, the main unit 230 and the display screen 210 are turned off.

[0058] In one possible implementation, the housing is provided with multiple USB socket interfaces 213; one end of each USB socket interface 213 is electrically connected to the host 230, and the other end of each USB socket interface 213 is suitable for electrical connection to external devices such as keyboards and mice, so that external devices such as keyboards and mice can be connected to the host 230 through the USB socket interface 213.

[0059] In one possible implementation, the housing is provided with a reserved CAN interface 214, which is arranged adjacent to the USB socket interface 213. One end of the reserved CAN interface 214 is electrically connected to the host 230, and the other end of the reserved CAN interface can be connected to other devices such as laptops.

[0060] In one possible implementation, the housing is provided with an SCI port 209, which is connected to the communication serial port of the host 300.

[0061] In one possible implementation, the housing is provided with a general aviation connector 208; the general aviation connector 208 is electrically connected to the main control board 300, and the general aviation connector 208 is used to program the main control board 300.

[0062] In one possible implementation, the housing is provided with a general-purpose PWM interface 207; the PWM interface is electrically connected to the main control board 300, and the PWM achieves precise control of the output voltage or current by adjusting the duty cycle of the pulse signal, thereby realizing the conversion of electrical energy and power control.

[0063] In one possible implementation, the housing is provided with a resolver aviation connector 206; one end of the resolver aviation connector 206 is electrically connected to the main control board 300, and the other end of the resolver aviation connector 206 is electrically connected to the motor 700. The motor 700 can feed back signals such as speed, angle, and internal temperature to the main control board 300 through the resolver aviation connector 206. The main control board 300 uploads the data to the host computer, and the display screen 210 can display this data.

[0064] In one possible implementation, a high-voltage switch 201 is provided on the housing; the high-voltage switch 201 is electrically connected to the circuit between the external high-voltage power supply and the first positive and negative terminal block 150, and the high-voltage switch 201 is suitable for controlling the on / off of the external high-voltage power supply to the controller under test.

[0065] In one possible implementation, a low-voltage switch 202 is provided on the housing; the low-voltage switch 202 is electrically connected to the circuit between the low-voltage power supply 410 and the main control board 300, and the low-voltage switch 202 is suitable for controlling the on / off of the low-voltage power supply 410 supplying power to the main control board 300.

[0066] In one possible implementation, a reset switch 205 is provided on the housing; the reset switch 205 is connected to the reset pin of the main control board 300, and its function is to restore the main control board 300 to its initial state through external physical means or circuit signals.

[0067] In one possible implementation, a 5V switch 203 is provided on the housing; the 5V switch 203 is electrically connected to the circuit between the external 5V power supply and the host 230, and the external 5V power supply is suitable for powering the serial port programming.

[0068] In one possible implementation, a JUMP switch 204 is provided on the housing; the JUMP switch 204 is connected to the main control board 300 and its function is to burn programs onto the main control board 300.

[0069] In one possible implementation, both the monitoring station and the test station are equipped with multiple casters 260 at their bottom to improve the overall mobility of the equipment. Furthermore, the casters 260 are fuma wheels, and there are six casters in total; the six casters 260 are connected to the base plate 250 of the monitoring station and the second base plate 920 of the test station via connecting plates on their tops.

[0070] The process of applying this application to perform motor drive testing on the power device 800 under test is as follows:

[0071] (1) Mount the power device 800 to be tested on the driver board 820 and connect the circuit of the driver board 820;

[0072] (2) Press the main switch button 211, the power button 215 and the low voltage switch 202, and the main unit 230, the display screen 210 and the main control board 300 will be powered on;

[0073] (3) Press the high voltage switch 201, and the external high voltage power supply provides high voltage power to the power device 800 under test;

[0074] (4) The main control board 300 sends a drive signal, and the power device under test 800 drives the motor 700 to work;

[0075] (5) Determine the driving capability of the power device 800 under test based on the data parameters displayed on the display screen 210.

[0076] This application can also assist the detection equipment in realizing the double-pulse test of the power device 800 under test. The specific test process is as follows: Figure 10 As shown:

[0077] (1) The power device 800 to be tested is mounted on the driver board 820 and connected to the circuit of the driver board 820;

[0078] (2) Press the high voltage switch 201, and the external high voltage power supply provides high voltage power to the power device 800 under test;

[0079] (3) Generation of double pulse signal:

[0080] First pulse: Power device 800 (lower tube) is turned on, and the current rises linearly through inductor 600 and the power device to reach the target test current.

[0081] Turn-off interval: When the power device 800 is turned off, the current freewheels through the upper body diode, and the inductor current remains approximately constant.

[0082] Second pulse: Turn on power device 800 again, use a differential probe to obtain the voltage Vce across the power device; use a Rogowski coil to measure the drain current / collector current; observe the voltage / current waveforms during the turn-off process (at this time, the current commutates from the body diode to the power device).

[0083] (4) Parameter calculation

[0084] • Switching time: turn-on delay time, turn-off delay time.

[0085] • Switching losses: turn-on losses and turn-off losses.

[0086] The turn-on and turn-off characteristics of the power device 800 are obtained based on the voltage, current, and time parameters in the waveform, and the reverse recovery behavior of the body diode is observed. The dynamic performance of the power device 800 in a real circuit is verified, and any faults or defects are identified. After the double-pulse test is completed, this application is used for motor drive verification testing.

[0087] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A power device testing device, characterized in that, include: Monitoring station, test station, main control board, motor, capacitor, and drive board for connecting to the power device under test; The monitoring station and the testing station are arranged adjacent to each other and connected to each other. The capacitor is disposed adjacent to the driver board on the top of the test bench, and the top of the test bench is also provided with a support member. The driver board is placed on the support member, and the driver board is suitable for placing the power device to be tested. Both the main control board and the host are located inside the cavity of the monitoring station. The output terminal of the main control board is electrically connected to the input terminal of the drive board so as to output control signals to the power device under test through the drive board. The motor is disposed inside the cavity of the test bench. The motor is electrically connected to the output end of the drive board to be driven by the power device under test on the drive board, and the motor is electrically connected to the main control board to feed back a speed signal to the main control board. The main control board is electrically connected to the host computer to transmit the speed signal to the host computer.

2. The power device testing equipment according to claim 1, characterized in that, Also includes: Inductor; the inductor is disposed inside the cavity of the test bench, and the output end of the drive board is electrically connected to the motor through the inductor.

3. The power device testing equipment according to claim 1, characterized in that, The monitoring station includes a first frame and a housing, wherein the first frame is disposed within the cavity of the housing to support the housing.

4. The power device testing equipment according to claim 3, characterized in that, The monitoring station is equipped with a display screen, which is mounted on the side wall of the housing and is electrically connected to the main unit.

5. The power device testing equipment according to claim 1, characterized in that, Also includes: Low-voltage power supply; The low-voltage power supply is located inside the cavity of the monitoring station, and is electrically connected to the main control board to provide operating voltage to the main control board.

6. The power device testing equipment according to claim 5, characterized in that, The monitoring station is equipped with a shielding plate, and the low-voltage power supply is installed on the shielding plate adjacent to the main control board.

7. The power device testing equipment according to claim 6, characterized in that, The monitoring station is equipped with a relay mounting plate suitable for supporting relays of high-voltage power supply. Both the shielding plate and the relay mounting plate are placed horizontally.

8. The power device testing equipment according to claim 2, characterized in that, The test stand includes: a second frame, a placement plate, a base plate, and three side plates; The placement plate and the base plate are respectively disposed on the upper and lower sides of the second frame, and the three side plates are arranged around the three sides of the second frame.

9. The power device testing equipment according to claim 1, characterized in that, The monitoring console is equipped with a three-phase aviation connector on its side wall. One end of the three-phase aviation connector is electrically connected to the drive board, and the other end of the three-phase aviation connector is electrically connected to the motor.

10. The power device testing equipment according to claim 8, characterized in that, The placement plate has two or more heat dissipation holes, which are arranged in an array.

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