Device for detecting fault of wind turbine power module

Abstract

The utility model relates to a device for detecting faults of a wind turbine power module, which comprises a shell, the front surface of the shell is an operation surface, and the operation surface is provided with an optical signal generating port, a positive electrode detection socket end, a common-stage detection socket end, a negative electrode detection socket end, a display screen, a signal detection change-over switch, an upper pipe end change-over switch and a lower pipe end change-over switch. The side surface of the housing is provided with a power port. A wave transmitter and an oscilloscope are arranged in the shell; the first output end and the second output end of the wave generator are connected with the oscilloscope through the signal detection change-over switch; the first output end is connected with the optical signal generating port, the optical signal generating port is connected with the upper tube end or the lower tube end of the power module or the driving board to be detected, and signal switching is carried out through the upper tube end and lower tube end change-over switch; and the power supply port is connected with a power supply terminal of the to-be-detected power module or the driving board. According to the utility model, whether the power module and the power module driving board are good or not can be judged, and the cost for replacing the power module and the power module driving board can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of instruments and meters, and particularly relates to a device for detecting faults of a wind turbine power module. Background Art

[0002] With the rapid development of wind power converter power module technology in recent years and the gradual increase of voltage and current levels, its application in the power system is becoming more and more extensive. After some equipment fails, some users choose to directly replace the power module and the power module drive board without testing the power module and the power module drive board to judge their quality. This will cause certain waste and increase the user's cost. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a device for detecting faults of a wind turbine power module to solve the above technical problems.

[0004] The utility model provides a device for detecting faults of a wind turbine power module, which includes a housing. The front of the housing is an operation surface, and the operation surface is provided with an optical signal generating port, a positive detection socket end, a common detection socket end, a negative detection socket end, a display screen, a signal detection conversion switch, an upper tube end and lower tube end conversion switch; a power supply port is provided on the side of the housing;

[0005] A wave generator and an oscilloscope are arranged inside the housing, and the oscilloscope includes the display screen;

[0006] The wave generator includes a first output end and a second output end. The first output end and the second output end are connected to the oscilloscope through the signal detection conversion switch for signal switching between the first output end and the second output end;

[0007] The first output end is connected to the optical signal generating port. The optical signal generating port is used to be connected to the upper tube end or the lower tube end of the power module or the drive board to be detected through an optical fiber, and signal switching is performed through the upper tube end and lower tube end conversion switch;

[0008] The positive detection socket end, the common detection socket end, and the negative detection socket end are respectively connected to the corresponding ports of the power module or the drive board to be detected through test lines;

[0009] The power supply port is used to be connected to the power supply terminal of the power module or the drive board to be detected through a power supply line to provide power for the power module or the drive board to be detected.

[0010] Furthermore, the wave generator is provided with a waveform generator coarse adjustment knob and a waveform generator fine adjustment knob, which are respectively used to adjust the waveform period and pulse width.

[0011] Further, a power switch is also provided on the operation surface.

[0012] Further, a reverse connection indicator light for the test line is also provided on the operation surface.

[0013] Further, the display screen is arranged in the upper middle part of the operation surface; the optical signal generating port, the reverse connection indicator light for the test line, the positive electrode detection socket end, the common electrode detection socket end, and the negative electrode detection socket end are arranged above the display screen; the coarse adjustment knob of the waveform generator, the fine adjustment knob of the waveform generator, the power switch, the signal detection conversion switch, and the upper tube end and lower tube end conversion switch are arranged below the display screen.

[0014] By means of the above solution, through the device for detecting faults of the wind turbine power module, it is possible to judge whether the power module and the power module drive board are in good or bad condition, which is beneficial to saving the cost of replacing the power module and the power module drive board.

[0015] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows. Brief Description of the Drawings

[0016] Figure 1 It is the front view of the device for detecting faults of the wind turbine power module of the present invention;

[0017] Figure 2 It is the side view of the device for detecting faults of the wind turbine power module of the present invention;

[0018] Figure 3 It is the schematic diagram of the device for detecting faults of the wind turbine power module of the present invention;

[0019] Figure 4 It is the circuit diagram of the waveform generator of the present invention.

[0020] Markings in the figure:

[0021] 1 - housing; 2 - power port; 3 - power switch; 4 - signal detection conversion switch; 5 - upper tube end and lower tube end conversion switch; 6 - coarse adjustment knob of waveform generator; 7 - fine adjustment knob of waveform generator; 8 - display screen; 9 - optical signal generating port; 10 - reverse connection indicator light for test line; 11 - positive electrode detection socket end; 12 - common electrode detection socket end; 13 - negative electrode detection socket end; 14 - waveform generator; 15 - oscilloscope. Detailed Description of the Embodiments

[0022] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0023] As shown in Figure 1 , Figure 2 , Figure 3 Figure 8, this embodiment provides a device for detecting faults in a wind turbine power module, including a housing 1. The front of the housing 1 is an operation surface, and the operation surface is provided with an optical signal generating port 9, a positive electrode detection socket end 11, a common electrode detection socket end 12, a negative electrode detection socket end 13, a display screen 8, a signal detection and conversion switch 4, and an upper tube end and lower tube end conversion switch 5. A power supply port 2 is provided on the side of the housing 1. Inside the housing 1, there is a wave generator 14 and an oscilloscope 15. The oscilloscope 15 includes a display screen 8. The wave generator 14 includes a first output end and a second output end. The first output end and the second output end are connected to the oscilloscope 15 through the signal detection and conversion switch 4 for signal switching between the first output end and the second output end. The first output end is connected to the optical signal generating port 9, and the optical signal generating port 9 is used to connect to the upper tube end or the lower tube end of the power module or the drive board to be detected through an optical fiber, and signal switching is performed through the upper tube end and lower tube end conversion switch 5. The positive electrode detection socket end 11, the common electrode detection socket end 12, and the negative electrode detection socket end 13 are respectively connected to the corresponding ports of the power module or the drive board to be detected through test lines. The power supply port 2 is used to connect to the power supply terminal of the power module or the drive board to be detected through a power supply line to provide power for the power module or the drive board to be detected.

[0024] In this embodiment, the wave generator 14 is provided with a waveform generator coarse adjustment knob 6 and a waveform generator fine adjustment knob 7, which are respectively used to adjust the waveform period and pulse width.

[0025] In this embodiment, the operation surface is also provided with a power switch 3.

[0026] In this embodiment, the operation surface is also provided with a test line reverse connection indicator light 10.

[0027] In this embodiment, the display screen 8 is arranged in the upper middle part of the operation surface. The optical signal generating port 9, the test line reverse connection indicator light 10, the positive electrode detection socket end 11, the common electrode detection socket end 12, and the negative electrode detection socket end 13 are arranged above the display screen 8. The waveform generator coarse adjustment knob 6, the waveform generator fine adjustment knob 7, the power switch 3, the signal detection and conversion switch 4, and the upper tube end and lower tube end conversion switch 5 are arranged below the display screen 8.

[0028] As shown in Figure 4As shown, the waveform generator 14 uses the LM339 voltage comparator as the core to build a PWM waveform generator. First, the front-end circuit is a triangular wave generating unit. By adjusting the size of the R5 resistor, the charging current of the capacitor can be changed, and the period of the triangular wave can be changed. R5 corresponds to the coarse adjustment knob 7 for waveform generation. The rear-end circuit is a triangular wave and DC voltage comparison unit. By adjusting the size of the R7 resistor, the voltage at pin 8 of the LM339 can be changed, and the pulse width of the PWM can be changed. R7 corresponds to the fine adjustment knob 6 for waveform generation.

[0029] Refer to Figure 3 As shown, since the power module or the driver board receives optical signal drive, a light signal generating port 9 is connected to the first output end of the PWM waveform generator. The upper or lower tube of the power module and the driver board is connected through an optical fiber.

[0030] The second output end of the PWM waveform generator is connected to the signal detection conversion switch 4. The functions of this switch include: when turned to the X part, the oscilloscope 15 is connected to the second output end of the PWM waveform generator. At this time, the waveform change of the waveform generator 14 can be observed at all times through the display screen 8 of the oscilloscope 14. When turned to the Y part, the oscilloscope 14 is connected to the detection port of the power module or the driver board. At this time, the waveform change of the power module or the driver board can be observed at all times through the oscilloscope 14.

[0031] During use, the light signal generating port 9 is connected to the power module or the driver board through an optical fiber. The signal detection conversion switch 4 is turned to the X part, and the oscilloscope 15 is connected to the second output end of the PWM waveform generator. The waveform generator presets the required waveform, and waveform a is observed through the oscilloscope. Then, the signal detection conversion switch 4 is turned to the Y part, and the oscilloscope is connected to the detection port of the power module or the driver board. Observe whether the waveform b is the same as waveform a and whether the PWM pulses are the same. If the PWM pulse signals are the same, it means that the power module or the driver board is normal; otherwise, it is damaged.

[0032] Through the device for detecting faults of the wind turbine power module, it is possible to judge the quality of the power module and the power module driver board, which is beneficial to saving the cost of replacing the power module and the power module driver board.

[0033] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A device for detecting a fault in a wind turbine power module, characterized in that: The invention comprises a housing (1), the front of the housing (1) being an operation surface, the operation surface being provided with an optical signal generating port (9), a positive pole detection socket end (11), a common pole detection socket end (12), a negative pole detection socket end (13), a display screen (8), a signal detection conversion switch (4), and an upper tube end and a lower tube end conversion switch (5); the side of the housing (1) being provided with a power supply port (2); An oscilloscope (14) and an oscilloscope (15) are provided inside the housing (1), and the oscilloscope (15) includes the display screen (8); The oscilloscope (14) comprises a first output end and a second output end, wherein the first output end and the second output end are connected to the oscilloscope (15) via the signal detection conversion switch (4) for signal switching between the first output end and the second output end; The first output end is connected to the optical signal generating port (9), and the optical signal generating port (9) is used to connect to the upper tube end or the lower tube end of the power module to be detected or the driving board through an optical fiber, and to perform signal switching through the upper tube end and the lower tube end conversion switch (5); The positive pole detection socket end (11), the common pole detection socket end (12), and the negative pole detection socket end (13) are respectively connected to corresponding ports of the power module to be detected or the driving board through test lines; The power port (2) is used to connect to the power terminal of the power module to be detected or the driving board through a power supply line, so as to provide power to the power module to be detected or the driving board.

2. The device for detecting a wind turbine power module fault according to claim 1, characterized in that: The waveform generator (14) is provided with a waveform generator coarse adjustment knob (6) and a waveform generator fine adjustment knob (7), which are used to adjust the waveform period and pulse width respectively.

3. The device for detecting a wind turbine power module fault according to claim 2, characterized in that: The operating surface is also provided with a power switch (3).

4. The device for detecting a fault in a wind turbine power module according to claim 3, characterized in that: The operation surface is also provided with a test line reverse connection indicator light (10).

5. The device for detecting a fault in a wind turbine power module according to claim 4, characterized in that: The display screen (8) is arranged at the upper middle part of the operation surface; the optical signal generating port (9), the test line reverse connection indicator light (10), the positive pole detection socket end (11), the common level detection socket end (12), and the negative pole detection socket end (13) are arranged above the display screen (8); the waveform generator coarse adjustment knob (6), the waveform generator fine adjustment knob (7), the power switch (3), the signal detection conversion switch (4), and the upper tube end and lower tube end conversion switch (5) are arranged below the display screen (8).

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