A converter drive board testing apparatus

Abstract

The utility model relates to a kind of converter drive board testing devices, including main control module, optical fiber transmitting module, optical fiber receiving module and communication interface module;The input end of the optical fiber transmitting module is connected the signal output end of the main control module, and the output end of the optical fiber transmitting module is used to connect the signal input end of converter drive board;The output end of the optical fiber receiving module is connected the signal input end of the main control module, and the input end of the optical fiber receiving module is connected the signal output end of the converter drive board;The signal transceiver end of the main control module is connected the signal transceiver end of the communication interface module;The utility model simplifies test procedure, reduces the complexity of equipment carrying and deployment, especially suitable for fan converter field maintenance and other limited space scenarios.

Description

Technical Field

[0001] This utility model relates to the field of converter drive technology, and specifically to a converter drive board testing device. Background Technology

[0002] The SWITCH converter is the core electrical system of the Goldwind 1.5MW wind turbine generator set. It is mainly used to convert the non-power frequency AC power generated by the generator into power frequency AC power and transmit it to the power grid. The SWITCH converter driver board is used to send optical drive signals to the SWITCH converter to drive it. The drive performance of the SWITCH converter driver board needs to be tested at the factory. In the existing technology, a pulse modulator is mainly used to send drive pulses to the converter driver board, and then a test device is used to detect the drive signal output by the converter driver board in order to test the drive performance of the converter driver board.

[0003] Although existing technologies can use two sets of devices to measure the driving performance of the converter drive board, using two independent sets of devices to test the driving performance of the converter drive board requires the combined efforts of the two sets of devices. Therefore, using two independent sets of devices to test the driving performance of the converter drive board will lead to technical drawbacks such as cumbersome operation. Utility Model Content

[0004] To address the technical problems of cumbersome operation and other technical drawbacks caused by using two independent devices to test the driving performance of converter drive boards in the existing technology, this utility model provides a converter drive board testing device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A converter driver board testing device includes a main control module, an optical fiber transmitting module, an optical fiber receiving module, a first power supply module, a second power supply module, and a communication interface module. The input terminal of the optical fiber transmitting module is connected to the signal output terminal of the main control module, and the output terminal of the optical fiber transmitting module is used to connect to the signal input terminal of the converter driver board; the output terminal of the optical fiber receiving module is connected to the signal input terminal of the main control module, and the input terminal of the optical fiber receiving module is connected to the signal output terminal of the converter driver board; the signal transceiver terminal of the main control module is connected to the signal transceiver terminal of the communication interface module; the input terminal of the first power module is connected to the power supply voltage, and the output terminal of the first power module is connected to the input terminal of the second power module; The output terminal of the first power module is connected to the power input terminal of the optical fiber transmitting module, the power input terminal of the optical fiber receiving module, and the power input terminal of the communication interface module, respectively, and the output terminal of the second power module is connected to the power input terminal of the main control module.

[0006] The beneficial effects of this invention are: by integrating driving and testing functions into one device, it can both drive the IGBT (i.e., the aforementioned converter driver board) by outputting complementary PWM signals through the fiber optic interface, and detect the output status of the driver board through the feedback signal receiving module, thus achieving "one machine for two uses". This integrated design greatly simplifies the testing process and reduces the complexity of carrying and deploying the equipment, making it particularly suitable for space-constrained scenarios such as on-site maintenance of wind turbine converters.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the optical fiber transmitting module includes a first optical fiber transmitting unit and a second optical fiber transmitting unit. The signal output terminal of the main control module is connected to the input terminal of the first optical fiber transmitting unit and the input terminal of the second optical fiber transmitting unit, respectively. The output terminals of the first optical fiber transmitting unit and the second optical fiber transmitting unit are both used to connect to the signal input terminal of the converter drive board. The output terminal of the first power module is connected to the power input terminal of the first optical fiber transmitting unit and the power input terminal of the second optical fiber transmitting unit, respectively.

[0009] The advantage of adopting the above-mentioned further scheme is that by setting up two optical fiber transmitting units, two pulse width modulation signals can be transmitted.

[0010] Furthermore, it also includes a test switch module, one end of which is connected to the output terminal of the first power module, and the other end of which is connected to the signal input terminal of the main control module.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, by setting up a test switch module, test start and stop signals can be sent to the main control module through the test switch module, thereby realizing the start and stop control of the test.

[0012] Furthermore, it also includes an external drive module, the input terminal of which is connected to the signal output terminal of the main control module, the output terminal of which is used to output external drive signals, and the power input terminal of which is connected to the power supply voltage.

[0013] The beneficial effect of adopting the above-mentioned further solution is that, by setting an external drive module, external drive signals can be sent through the external drive module to realize the input of high and low level pulse signals, which facilitates the testing of the converter drive board's processing performance for sending low level pulse signals when testing the converter drive board.

[0014] Furthermore, the external drive module includes a first external drive unit and a second external drive unit. The signal output terminal of the main control module is connected to the input terminal of the first external drive unit and the input terminal of the second external drive unit, respectively. The power input terminal of the first external drive unit and the power input terminal of the second external drive unit are both connected to the power supply voltage. The output terminal of the first external drive unit is used to output a first external drive signal, and the output terminal of the second external drive unit is used to output a second external drive signal.

[0015] The advantage of adopting the above-mentioned further solution is that by setting two external drive units, two high and low level pulse signals can be sent.

[0016] Furthermore, it also includes a selection switch module, one end of which is connected to the output terminal of the first power module, and the other end of which is connected to the signal input terminal of the main control module.

[0017] The beneficial effect of adopting the above-mentioned further solution is that, by setting a selection switch module, it is possible to realize optical signal output or high / low level pulse output by turning the selection switch module on or off.

[0018] Furthermore, it also includes an indicator light module, the controlled end of which is connected to the signal output end of the main control module, one end of which is connected to the output end of the first power module, and the other end of which is grounded.

[0019] The advantage of adopting the above-mentioned further solution is that, by setting up an indicator light module, the test status can be displayed through indicator lights during testing.

[0020] Furthermore, it also includes a communication isolation module, one end of which is connected to the signal transceiver terminal of the main control module, the other end of which is connected to the signal transceiver terminal of the communication interface module, and the power input terminal of the communication isolation module is connected to the output terminal of the second power module.

[0021] The beneficial effect of adopting the above-mentioned further solution is that by setting up a communication isolation module, the communication between the main control module and the communication interface module can be isolated, thereby improving the anti-interference performance.

[0022] Furthermore, it also includes a wide adjustment module, one end of which is connected to the output terminal of the second power module, and the other end of which is connected to the signal input terminal of the main control module.

[0023] Furthermore, the pulse width adjustment module includes a first pulse width adjustment unit and a second pulse width adjustment unit. The output terminal of the second power module is connected to one end of the first pulse width adjustment unit and one end of the second pulse width adjustment unit, respectively. The signal input terminal of the main control module is connected to the other end of the first pulse width adjustment unit and the other end of the second pulse width adjustment unit, respectively.

[0024] The beneficial effect of adopting the above-mentioned further solution is that, by setting up a wide adjustment module, the duty cycle and frequency of the pulse width modulation signal can be manually adjusted externally, realizing a hybrid adjustment mechanism consisting of external manual adjustment and the adjustment function built into the main control module. The adjustment function built into the main control module can be precisely set through the communication interface module, meeting the standardization requirements of batch testing. The seamless switching between the two methods ensures both operational convenience and improved testing accuracy, solving the problem of insufficient adjustment flexibility of traditional tooling. Attached Figure Description

[0025] Figure 1 This is a structural block diagram of the present invention; Figure 2 This is the circuit diagram of the fiber optic transmitting unit; Figure 3 This is the circuit diagram of the fiber optic receiver module; Figure 4 This is the circuit diagram for the indicator light unit; Figure 5 Circuit diagram for testing the switch module; Figure 6 Circuit diagram for selecting the switch module; Figure 7 This is the circuit diagram for the external drive unit; Figure 8 This is the circuit diagram of the pulse width adjustment unit.

[0026] The attached diagram lists the components represented by each number as follows: 1. Fiber optic transmitting module; 2. First fiber optic transmitting unit; 3. Second fiber optic transmitting unit; 4. Fiber optic receiving module; 5. Indicator light module; 6. Test switch module; 7. Selector switch module; 8. First power supply module; 9. Second power supply module; 10. Communication interface module; 11. Communication isolation module; 12. Pulse width adjustment module; 13. First pulse width adjustment unit; 14. Second pulse width adjustment unit; 15. External drive module; 16. First external drive unit; 17. Second external drive unit. Detailed Implementation

[0027] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0028] like Figure 1 As shown, this embodiment provides a converter driver board testing device, including a main control module U1, an optical fiber transmitting module 1, an optical fiber receiving module 4, a first power supply module 8, a second power supply module 9, and a communication interface module 10. The input end of the fiber optic transmitting module 1 is connected to the signal output end of the main control module U1, and the output end of the fiber optic transmitting module 1 is used to connect to the signal input end of the converter drive board; the output end of the fiber optic receiving module 4 is connected to the signal input end of the main control module U1, and the input end of the fiber optic receiving module 4 is connected to the signal output end of the converter drive board; the signal transceiver end of the main control module U1 is connected to the signal transceiver end of the communication interface module 10; the input end of the first power module 8 is connected to the power supply voltage, and the output end of the first power module 8 is connected to the input end of the second power module 9; The output terminal of the first power module 8 is connected to the power input terminal of the optical fiber transmitting module 1, the power input terminal of the optical fiber receiving module 4, and the power input terminal of the communication interface module 10, respectively. The output terminal of the second power module 9 is connected to the power input terminal of the main control module U1. The power supply voltage is 24V DC. The first power module 8 outputs 5V DC, and the second power module 9 converts the 5V DC output from the first power module 8 to 3.3V DC for output. The main control module U1 uses an STM32F103RCT6 microcontroller.

[0029] By integrating driving and testing functions into a single device, it can both drive the IGBT (i.e., the aforementioned converter driver board) by outputting complementary PWM signals through a fiber optic interface and detect the output status of the driver board through a feedback signal receiving module, achieving "dual functionality in one device." This integrated design significantly simplifies the testing process and reduces the complexity of carrying and deploying the equipment, making it particularly suitable for space-constrained scenarios such as on-site maintenance of wind turbine converters.

[0030] The fiber optic transmitting module 1 includes a first fiber optic transmitting unit 2 and a second fiber optic transmitting unit 3. The signal output terminal of the main control module U1 is connected to the input terminals of the first fiber optic transmitting unit 2 and the second fiber optic transmitting unit 3, respectively. The output terminals of both the first fiber optic transmitting unit 2 and the second fiber optic transmitting unit 3 are used to connect to the signal input terminals of the converter drive board. The output terminal of the first power module 8 is connected to the power input terminals of the first fiber optic transmitting unit 2 and the second fiber optic transmitting unit 3, respectively. By setting two fiber optic transmitting units, two pulse width modulation signals can be transmitted.

[0031] The converter driver board testing device also includes a test switch module 6, one end of which is connected to the output terminal of the first power module 8, and the other end of which is connected to the signal input terminal of the main control module U1.

[0032] By setting up the test switch module 6, test start and stop signals can be sent to the main control module U1 through the test switch module 6, thereby realizing the start and stop control of the test.

[0033] The converter drive board testing device also includes an external drive module 15. The input terminal of the external drive module 15 is connected to the signal output terminal of the main control module U1. The output terminal of the external drive module 15 is used to output external drive signals. The power input terminal of the external drive module 15 is connected to the power supply voltage.

[0034] By setting the external drive module 15, external drive signals can be sent through the external drive module 15 to realize the input of high and low level pulse signals, which facilitates the testing of the converter drive board's processing performance of sending low level pulse signals when testing the converter drive board.

[0035] The external drive module 15 includes a first external drive unit 16 and a second external drive unit 17. The signal output terminal of the main control module U1 is connected to the input terminals of the first external drive unit 16 and the second external drive unit 17, respectively. The power input terminals of both the first external drive unit 16 and the second external drive unit 17 are connected to the power supply voltage. The output terminal of the first external drive unit 16 is used to output a first external drive signal, and the output terminal of the second external drive unit 17 is used to output a second external drive signal. By setting two external drive units, two high and low level pulse signals can be sent.

[0036] The converter driver board testing device also includes a selection switch module 7. One end of the selection switch module 7 is connected to the output terminal of the first power supply module 8, and the other end of the selection switch module 7 is connected to the signal input terminal of the main control module U1. By setting the selection switch module 7, the output of optical signals or high / low level pulses can be controlled by turning the selection switch module 7 on or off.

[0037] The converter driver board testing device also includes an indicator light module 5. The controlled end of the indicator light module 5 is connected to the signal output end of the main control module U1, one end of the indicator light module 5 is connected to the output end of the first power module 8, and the other end of the indicator light module 5 is grounded. By setting the indicator light module 5, the test status can be displayed through indicator lights during testing.

[0038] The converter driver board testing device also includes a communication isolation module 11. One end of the communication isolation module 11 is connected to the signal transceiver terminal of the main control module U1, and the other end is connected to the signal transceiver terminal of the communication interface module 10. The power input terminal of the communication isolation module 11 is connected to the output terminal of the second power module 9. By setting the communication isolation module 11, communication between the main control module and the communication interface module 10 can be isolated, improving anti-interference performance.

[0039] The converter drive board testing device also includes a wide adjustment module 12, one end of which is connected to the output terminal of the second power module 9, and the other end of which is connected to the signal input terminal of the main control module U1.

[0040] The pulse width modulation module 12 includes a first pulse width modulation unit 13 and a second pulse width modulation unit 14. The output terminal of the second power module 9 is connected to one end of the first pulse width modulation unit 13 and one end of the second pulse width modulation unit 14, respectively. The signal input terminal of the main control module U1 is connected to the other end of the first pulse width modulation unit 13 and the other end of the second pulse width modulation unit 14, respectively. By setting the pulse width modulation module 12, the duty cycle and frequency of the pulse width modulation signal can be manually adjusted externally, realizing a hybrid adjustment mechanism of external manual adjustment and the adjustment function built into the main control module. The adjustment function built into the main control module can be precisely set through the communication interface module to meet the standardization requirements of batch testing. The seamless switching between the two methods ensures both operational convenience and improved testing accuracy, solving the problem of insufficient adjustment flexibility of traditional tooling.

[0041] like Figure 2As shown, the fiber optic transmitting module includes two identical fiber optic transmitting units, namely the first fiber optic transmitting unit 2 and the second fiber optic transmitting unit 3. Each fiber optic transmitting unit includes a fiber optic transmitter, a first NMOS transistor Q1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The output terminal of the first power supply module 8 is connected to one end of the first resistor R1 and one end of the second resistor R2, respectively. The power supply terminal of the fiber optic transmitter is connected to the other end of the first resistor R1 and the other end of the second resistor R2, respectively. The drain of the first NMOS transistor Q1 is connected to the signal input terminal of the fiber optic transmitter, the source of the first NMOS transistor Q1 is grounded, and the gate of the first NMOS transistor Q1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4, respectively. The other end of the fourth resistor R4 is grounded, and the other end of the third resistor R3 is connected to the signal output terminal of the main control module U1. When the main control module U1 outputs a PWM-OPT1 pulse width modulation signal or a PWM-OPT2 pulse width modulation signal, the first NMOS transistor Q1 is intermittently turned on, enabling the fiber optic transmitter to output pulse signals to drive the driver board for testing. The fiber optic transmitter is a T-1512 fiber optic transmitter. The T-1512 fiber optic transmitter converts the amplified and isolated PWM electrical signal into an optical signal, which is then transmitted through the fiber optic interface for testing on the converter driver board. Specifically, the amplification process involves the PWM electrical signal driving the first NMOS transistor Q1 to intermittently turn on. When Q1 is off, the T-1512 fiber optic transmitter is powered by a 5V voltage, resulting in a high-level 5V input signal. When the first NMOS transistor Q1 is on, the T-1512 fiber optic transmitter is grounded and thus outputs a low-level signal.

[0042] like Figure 3As shown, the fiber optic receiver module includes a fiber optic receiver, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first light-emitting diode D1, and a second NMOS transistor Q2. The output terminal of the first power supply module 8 is connected to the power supply terminal of the fiber optic receiver and one end of the fifth resistor R5. One end of the sixth resistor R6 is connected to the output terminal of the fiber optic receiver and the other end of the fifth resistor R5. The other end of the sixth resistor R6 is connected to the gate of the second NMOS transistor Q2 and one end of the seventh resistor R7. The source of the second NMOS transistor Q2 and the other end of the seventh resistor R7 are both grounded. One end of the eighth resistor R8 is connected to the output terminal of the second power supply module 9, and the other end of the eighth resistor R8 is connected to the anode of the first light-emitting diode D1. The cathode of the first light-emitting diode D1 is connected to the drain of the second NMOS transistor Q2. The drain of the second NMOS transistor Q2 is connected to the signal input terminal of the main control module U1. When the fiber optic receiver receives a drive signal output from the driver board, the drive signal controls the on / off state of the second NMOS transistor Q2, thereby transmitting the drive signal to the main control module U1. The fiber optic receiver is an R-2521Z fiber optic receiver. The R-2521Z fiber optic receiver receives the optical signal fed back from the driver board, converts it into an electrical signal, and transmits it to the main control module U1 for processing. When the second NMOS transistor Q2 is turned on, the main control module U1 receives a low-level signal; when the second NMOS transistor Q2 is turned off, the main control module U1 receives a high-level signal.

[0043] like Figure 4 As shown, the indicator module 5 includes multiple indicator units. Each indicator unit includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a second light-emitting diode D2, and a third NMOS transistor Q2. The signal output terminal of the main control module U1 is connected to one end of the ninth resistor R9 of each indicator unit. The other end of the ninth resistor R9 is connected to one end of the tenth resistor R10 and the gate of the third NMOS transistor Q2. The source of the third NMOS transistor Q2 and the other end of the tenth resistor R10 are both grounded. One end of the eleventh resistor R11 is connected to the output terminal of the first power supply module 8, and the other end of the eleventh resistor R11 is connected to the positive terminal of the second light-emitting diode D2. The negative terminal of the second light-emitting diode D2 is connected to the drain of the third NMOS transistor Q2. When the main control module U1 sends a drive signal to drive the third NMOS transistor Q2 to be turned off or on, the second light-emitting diode D2 is off when the third NMOS transistor Q2 is off, and the second light-emitting diode D2 is on when the third NMOS transistor Q2 is on.

[0044] like Figure 5As shown, the test switch module 6 includes a twelfth resistor R12, a first optocoupler U2, a thirteenth resistor R13, and a first switch S1. When switch S1 is closed, the first optocoupler U2 is turned on, the output of the test switch module is grounded, and the test switch module sends a low-level signal to the main control module U1. When switch S1 is opened, the first optocoupler U2 is turned off, the output of the test switch module is a high-level signal, and the test switch module sends a high-level signal to the main control module U1. The test switch module 6 realizes the test-on and test-off functions by sending high and low level signals to the main control module U1.

[0045] like Figure 6 As shown, the selection switch module 7 includes a fourteenth resistor R14, a second optocoupler U3, a fifteenth resistor R13, and a second switch S2. When switch S2 is closed, the second optocoupler U3 is turned on, the output terminal of the selection switch module 7 is grounded, and the selection switch module 7 sends a low-level signal to the main control module U1. When switch S2 is open, the second optocoupler U3 is turned off, the output of the selection switch module 7 is a high-level signal, and the selection switch module 7 sends a high-level signal to the main control module U1. The selection switch module 7 selects whether the output is from the fiber optic transmitter module or the external drive module by sending high and low level signals to the main control module U1.

[0046] like Figure 7 As shown, the external drive module 15 includes two identical external drive units, namely the first external drive unit 16 and the second external drive unit 17. Each external drive unit includes a sixteenth resistor R14, a third optocoupler U4, a seventeenth resistor R17, an eighteenth resistor R18, and a nineteenth resistor R19. When the main control module U1 outputs a high-level signal, the third optocoupler U4 is turned on, and the output terminal of the third optocoupler U4 outputs the voltage on the seventeenth resistor R17, thus outputting a high-level signal. When the main control module U1 outputs a low-level signal, the third optocoupler U4 is turned off, and the output terminal of the third optocoupler U4 outputs zero voltage on the seventeenth resistor R17, thus outputting a low-level signal; thereby realizing the output of the external drive signal.

[0047] like Figure 8 As shown, the pulse width adjustment module 12 includes two identical pulse width adjustment units, namely the first pulse width adjustment unit 13 and the second pulse width adjustment unit 14. Each pulse width adjustment unit includes an adjustable resistor R20. One fixed end of the adjustable resistor R20 is connected to the output terminal of the second power supply module 9, and the other fixed end of the adjustable resistor R20 is grounded. The moving end of the adjustable resistor R20 is connected to the signal input terminal of the main control module U1. The adjustable resistor R20 can be a rotary sliding rheostat; the rotary sliding rheostat allows for manual adjustment of the PWM signal duty cycle (0-100%) and frequency (1kHz-20kHz), providing intuitive and convenient operation.

[0048] In some other embodiments, the communication isolation module 11 includes multiple optocoupler isolation circuits. Each optocoupler isolation circuit controls the transmission and reception channels between the communication interface module 10 and the main control module U1 to use optocoupler isolation circuits for isolated communication. The optocoupler isolation circuits can be the same circuits as those in the external driver unit. The communication interface module 10 can be an RS485 communication interface circuit module.

[0049] This utility model embodiment solves the problem that driving and testing functions often require two separate devices, which are cumbersome to operate and have poor compatibility. This solution integrates driving and testing functions onto a 10cm×10cm circuit board. It can both drive IGBTs by outputting complementary PWM signals through a fiber optic interface and detect the output status of the driver board through a feedback signal receiving module, achieving "one machine for two uses." This integrated design significantly simplifies the testing process and reduces the complexity of equipment carrying and deployment, making it particularly suitable for space-constrained scenarios such as on-site maintenance of wind turbine converters. High-power wind turbine converters operate in environments with strong electromagnetic interference, and the single communication method and simple isolation design in the background technology are prone to signal distortion. This solution adopts a collaborative design of dual isolation and dual communication: the power system achieves multi-level isolation through URB4805YMD and B0505S, and the signal link achieves electro-optical-electrical conversion isolation through optocoupler chips and fiber optic transmission. Combined with the dual communication modes of RS485 and fiber optics, it can effectively resist electromagnetic interference. This design ensures the transmission stability of the PWM signal within the 1kHz-20kHz adjustment range, as well as the accuracy of the fault feedback signal, solving the problem of drive failure or test misjudgment caused by interference in the background technology. The background technology uses a single adjustment method, such as only supporting manual or software adjustment, which is difficult to adapt to the testing requirements of different IGBT models. This design adopts a hybrid adjustment mechanism of "manual + microcontroller self-adjustment": the rotary sliding rheostat can quickly achieve intuitive adjustment of the duty cycle from 0-100% and the frequency from 1kHz-20kHz, suitable for rapid on-site troubleshooting; software adjustment supports precise parameter settings via RS485 or fiber optic interface, meeting the standardization requirements of batch testing. The seamless switching between the two methods ensures both ease of operation and improved testing accuracy, solving the problem of insufficient flexibility in traditional tooling adjustments. Through highly integrated design, the core control, power supply, communication, and signal processing modules are compressed onto a 10cm×10cm circuit board, making it lightweight and easy to integrate into existing testing systems. This miniaturized design not only reduces transportation and storage costs but also allows the tooling to be directly deployed inside the wind turbine nacelle for online testing, reducing the workload of disassembling and moving the drive board and significantly improving maintenance efficiency. This invention, through technological innovations in integration, anti-interference, flexible adjustment, and miniaturization, effectively overcomes the technical bottlenecks in IGBT driving and testing of high-power wind turbine converters, achieving a qualitative improvement in functionality, reliability, and adaptability compared to prior art.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the concept and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A converter driver board testing device, characterized in that: It includes a main control module (U1), an optical fiber transmitting module (1), an optical fiber receiving module (4), a first power supply module (8), a second power supply module (9), and a communication interface module (10). The input end of the optical fiber transmitting module (1) is connected to the signal output end of the main control module (U1), and the output end of the optical fiber transmitting module (1) is used to connect to the signal input end of the converter drive board; the output end of the optical fiber receiving module (4) is connected to the signal input end of the main control module (U1), and the input end of the optical fiber receiving module (4) is connected to the signal output end of the converter drive board; the signal transceiver end of the main control module (U1) is connected to the signal transceiver end of the communication interface module (10), the input end of the first power module (8) is connected to the power supply voltage, and the output end of the first power module (8) is connected to the input end of the second power module (9); The output terminal of the first power module (8) is connected to the power input terminal of the optical fiber transmitting module (1), the power input terminal of the optical fiber receiving module (4), and the power input terminal of the communication interface module (10), respectively. The output terminal of the second power module (9) is connected to the power input terminal of the main control module (U1).

2. The converter drive board testing device according to claim 1, characterized in that: The fiber optic transmitting module (1) includes a first fiber optic transmitting unit (2) and a second fiber optic transmitting unit (3). The signal output terminal of the main control module (U1) is connected to the input terminal of the first fiber optic transmitting unit (2) and the input terminal of the second fiber optic transmitting unit (3), respectively. The output terminals of the first fiber optic transmitting unit (2) and the second fiber optic transmitting unit (3) are both used to connect to the signal input terminal of the converter drive board. The output terminal of the first power module (8) is connected to the power input terminal of the first fiber optic transmitting unit (2) and the power input terminal of the second fiber optic transmitting unit (3), respectively.

3. The converter drive board testing device according to claim 1, characterized in that: It also includes a test switch module (6), one end of which is connected to the output terminal of the first power module (8), and the other end of which is connected to the signal input terminal of the main control module (U1).

4. The converter drive board testing device according to claim 1, characterized in that: It also includes an external drive module (15), the input terminal of which is connected to the signal output terminal of the main control module (U1), the output terminal of which is used to output external drive signals, and the power input terminal of which is connected to the power supply voltage.

5. The converter drive board testing device according to claim 4, characterized in that: The external drive module (15) includes a first external drive unit (16) and a second external drive unit (17). The signal output terminal of the main control module (U1) is connected to the input terminal of the first external drive unit (16) and the input terminal of the second external drive unit (17), respectively. The power input terminal of the first external drive unit (16) and the power input terminal of the second external drive unit (17) are both connected to the power supply voltage. The output terminal of the first external drive unit (16) is used to output a first external drive signal, and the output terminal of the second external drive unit (17) is used to output a second external drive signal.

6. The converter drive board testing device according to claim 5, characterized in that: It also includes a selection switch module (7), one end of which is connected to the output terminal of the first power module (8), and the other end of which is connected to the signal input terminal of the main control module (U1).

7. The converter drive board testing device according to claim 1, characterized in that: It also includes an indicator light module (5), the controlled end of the indicator light module (5) is connected to the signal output end of the main control module (U1), one end of the indicator light module (5) is connected to the output end of the first power supply module (8), and the other end of the indicator light module (5) is grounded.

8. The converter drive board testing device according to claim 1, characterized in that: It also includes a communication isolation module (11), one end of which is connected to the signal transceiver terminal of the main control module (U1), the other end of which is connected to the signal transceiver terminal of the communication interface module (10), and the power input terminal of the communication isolation module (11) is connected to the output terminal of the second power module (9).

9. The converter drive board testing device according to claim 1, characterized in that: It also includes a wide adjustment module (12), one end of which is connected to the output terminal of the second power module (9), and the other end of which is connected to the signal input terminal of the main control module (U1).

10. The converter drive board testing device according to claim 9, characterized in that: The pulse width adjustment module (12) includes a first pulse width adjustment unit (13) and a second pulse width adjustment unit (14). The output terminal of the second power module (9) is connected to one end of the first pulse width adjustment unit (13) and one end of the second pulse width adjustment unit (14), respectively. The signal input terminal of the main control module (U1) is connected to the other end of the first pulse width adjustment unit (13) and the other end of the second pulse width adjustment unit (14), respectively.

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