Control signal output circuit for fan controller test

Abstract

The utility model relates to the technical field of fan controller testing, and discloses a control signal output circuit for fan controller testing, which comprises a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a voltage dividing unit, resistors R1 to R8 and a capacitor C1. In actual use, when control signals PWMC with different level states are input, the on-off of the second switch tube Q2 and the third switch tube Q3 can be controlled, so that high-side driving is realized by controlling the on-off of the first switch tube Q1, and low-side driving is realized by controlling the on-off of the third switch tube Q3. And finally, high-side driving and low-side driving of the fan controller can be carried out through one circuit.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine controller testing technology, and specifically to a control signal output circuit for wind turbine controller testing. Background Technology

[0002] Currently, brushless axial flow fans are widely used in various ventilation applications due to their high performance, low noise, and ease of maintenance.

[0003] It has been widely used in ventilation applications. During the use of brushless axial flow fans, their specific rotation...

[0004] The process is controlled by a brushless axial flow fan controller.

[0005] For brushless axial flow fan controllers, testing is required after production. The testing of brushless axial flow controllers is divided into high-side drive and low-side drive according to different drive types. However, the existing testing equipment cannot be compatible with both high-side drive and low-side drive at the same time, requiring different testing equipment for testing, which makes the whole testing process cumbersome. Utility Model Content

[0006] In view of the shortcomings of the background technology, the present invention provides a control signal output circuit for testing wind turbine controllers. The technical problem to be solved is that existing brushless wind turbine testing lacks a control signal output circuit that is compatible with both high-side drive and low-side drive.

[0007] To solve the above technical problems, this utility model provides the following technical solution: a control signal output circuit for testing a wind turbine controller, including a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a voltage divider unit, resistors R1-R8, and a capacitor C1;

[0008] The input terminal of the first switch Q1 is electrically connected to the input terminal of the voltage divider unit and one end of resistor R5, respectively, for connecting to the power supply voltage VCC; the control terminal of the first switch Q1 is electrically connected to one voltage divider node of the voltage divider unit; the output terminal of the first switch Q1 is electrically connected to one end of resistor R3, one end of resistor R4, and one end of capacitor C1, respectively; the other ends of resistor R4 and capacitor C1 are both grounded; the other end of resistor R3 is used to output a high-side drive signal; the output terminal of the voltage divider unit is electrically connected to the input terminal of the second switch Q2; the control terminal of the second switch Q2 is electrically connected to one end of resistor R1 and one end of resistor R2, respectively; the other end of resistor R1 is electrically connected to the other end of resistor R7, for inputting the control signal PWMC; the other end of resistor R2 and the output terminal of the second switch Q2 are both grounded.

[0009] The other end of resistor R7 is electrically connected to the control terminal of the third switch Q3 and one end of resistor R8. The other end of resistor R8 and the output terminal of the third switch Q3 are both grounded. The input terminal of the third switch Q3 is electrically connected to the other end of resistor R5 and one end of resistor R6. The other end of resistor R6 is used to output the low-side drive signal.

[0010] In one embodiment, the voltage divider unit includes resistors R9 and R10 connected in series. One end of resistor R9 is the input terminal of the voltage divider unit, and the other end of resistor R9 is the voltage dividing node of the voltage divider unit. The end of resistor R10 that is not electrically connected to resistor R9 is the output terminal of the voltage divider unit.

[0011] In one embodiment, the present invention further includes a first overcurrent protection unit, which includes a fifth switch Q5 and a resistor R11. The input terminal of the fifth switch Q5 is electrically connected to the resistor R11 for connecting to the power supply voltage VCC. The control terminal of the fifth switch Q5 is electrically connected to the other end of the resistor R11 and the input terminal of the first switch Q1, respectively. The output terminal of the second switch Q5 is electrically connected to the control terminal of the first switch Q1.

[0012] In one embodiment, the fifth switching transistor Q5 is a PNP transistor.

[0013] In one embodiment, the present invention further includes a second overcurrent protection unit, which includes a fourth switch Q4 and a resistor R12. The input terminal of the fourth switch Q4 is electrically connected to the control terminal of the third switch Q3. The control terminal of the fourth switch Q4 is electrically connected to one end of the resistor R12 and the output terminal of the third switch Q3, respectively. The output terminal of the fourth switch Q4 and the other end of the resistor R12 are both grounded.

[0014] In one embodiment, the fourth switch Q4 is an NPN transistor.

[0015] In one embodiment, the first switching transistor Q1 is a PNP transistor.

[0016] In one embodiment, the second switch Q2 is an NPN transistor.

[0017] In one embodiment, the third switch Q3 is an NPN transistor.

[0018] In one embodiment, the present invention further includes a test voltage output unit, which includes a resistor R22. One end of resistor R22 is electrically connected to one end of resistor R23 for inputting the power supply voltage VCC. The other end of resistor R22 is electrically connected to the cathode of Zener diode Z20, the cathode of Zener diode Z21, the collector of transistor Q21, and the base of transistor Q22. The other end of resistor R23 is electrically connected to the collector of transistor Q22. The anode of Zener diode Z20 is grounded, and the anode of Zener diode Z21 is connected to the base of transistor Q20. The collector of transistor Q20 is electrically connected. The base of transistor Q20 is electrically connected to one end of resistor R20 and one end of resistor R21. The other end of resistor R20 is connected to the input control signal VA_C. The other end of resistor R21 and the emitter of transistor Q20 are both grounded. The emitter of transistor Q22 is electrically connected to the base of transistor Q21 and one end of resistor R24. The emitter of transistor Q10 is electrically connected to one end of resistor R25, one end of capacitor C20 and the other end of resistor R24, which is the test voltage output terminal. The other ends of resistor R25 and capacitor C20 are both grounded.

[0019] The beneficial effects of this utility model compared with the prior art are as follows: In actual use, when this utility model inputs control signals PWMC with different level states, it can control the on and off of the second switch Q2 and the third switch Q3, thereby realizing high-side drive by controlling the on and off of the first switch Q1 and realizing low-side drive by controlling the on and off of the third switch Q3. Finally, the high-side drive and low-side drive of the fan controller can be achieved through a single circuit. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of the present invention in the embodiments;

[0021] Figure 2 This is a circuit diagram of the test voltage output unit in the embodiment. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] like Figure 1 As shown, the control signal output circuit for wind turbine controller testing provided in this embodiment includes a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a voltage divider unit 1, resistors R1-R8, and a capacitor C1.

[0024] The input terminal of the first switch Q1 is electrically connected to the input terminal of voltage divider unit 1 and one end of resistor R5, respectively, for connecting to the power supply voltage VCC; the control terminal of the first switch Q1 is electrically connected to one voltage divider node of voltage divider unit 1; the output terminal of the first switch Q1 is electrically connected to one end of resistor R3, one end of resistor R4, and one end of capacitor C1, respectively; the other ends of resistor R4 and capacitor C1 are both grounded; the other end of resistor R3 is used to output the high-side drive signal; the output terminal of voltage divider unit 1 is electrically connected to the input terminal of the second switch Q2; the control terminal of the second switch Q2 is electrically connected to one end of resistor R1 and one end of resistor R2, respectively; the other end of resistor R1 is electrically connected to the other end of resistor R7, for inputting the control signal PWMC; the other end of resistor R2 and the output terminal of the second switch Q2 are both grounded.

[0025] The other end of resistor R7 is electrically connected to the control terminal of the third switch Q3 and one end of resistor R8. The other end of resistor R8 and the output terminal of the third switch Q3 are both grounded. The input terminal of the third switch Q3 is electrically connected to the other end of resistor R5 and one end of resistor R6. The other end of resistor R6 is used to output the low-side drive signal.

[0026] In practical use, when the present invention inputs control signals PWMC with different level states, it can control the on / off state of the second switch Q2 and the third switch Q3, thereby achieving high-side drive by controlling the on / off state of the first switch Q1 and low-side drive by controlling the on / off state of the third switch Q3. Ultimately, the high-side drive and low-side drive of the fan controller can be achieved through a single circuit.

[0027] In addition, in this embodiment, the first switch Q1 is a PNP transistor; the second switch Q2 is an NPN transistor; and the third switch Q3 is an NPN transistor.

[0028] In addition, in this embodiment, the voltage divider unit 1 includes resistors R9 and R10 connected in series. One end of resistor R9 is the input terminal of the voltage divider unit 1, and the other end of resistor R9 is the voltage divider node of the voltage divider unit 1. The end of resistor R10 that is not electrically connected to resistor R9 is the output terminal of the voltage divider unit 1.

[0029] In this embodiment, to protect the first switching transistor Q1, the present invention also includes a first overcurrent protection unit 2. The first overcurrent protection unit 2 includes a fifth switching transistor Q5 and a resistor R11. The input terminal of the fifth switching transistor Q5 is electrically connected to the resistor R11 for connecting to the power supply voltage VCC. The control terminal of the fifth switching transistor Q5 is electrically connected to the other end of the resistor R11 and the input terminal of the first switching transistor Q1. The output terminal of the second switching transistor Q5 is electrically connected to the control terminal of the first switching transistor Q1. The fifth switching transistor Q5 is a PNP transistor.

[0030] In practical use, when the current flowing through resistor R11 increases to the point that the fifth switch Q5 turns on, the turned-on fifth switch Q5 will turn off the first switch Q1, thus achieving overcurrent protection.

[0031] In this embodiment, the present invention further includes a second overcurrent protection unit 3, which includes a fourth switch Q4 and a resistor R12. The input terminal of the fourth switch Q4 is electrically connected to the control terminal of the third switch Q3. The control terminal of the fourth switch Q4 is electrically connected to one end of the resistor R12 and the output terminal of the third switch Q3, respectively. The output terminal of the fourth switch Q4 and the other end of the resistor R12 are both grounded. The fourth switch Q4 is an NPN transistor.

[0032] In practical use, when the current flowing through resistor R12 increases to the point that the fourth switch Q4 is turned on, the third switch Q3 is turned off, thereby achieving overcurrent protection.

[0033] In addition, in this embodiment, the present invention also includes a test voltage output unit, the circuit of which is as follows: Figure 2 As shown, the circuit includes resistor R22. One end of resistor R22 is electrically connected to one end of resistor R23 for input power supply voltage VCC. The other end of resistor R22 is electrically connected to the cathode of Zener diode Z20, the cathode of Zener diode Z21, the collector of transistor Q21, and the base of transistor Q22. The other end of resistor R23 is electrically connected to the collector of transistor Q22. The anode of Zener diode Z20 is grounded. The anode of Zener diode Z21 is electrically connected to the collector of transistor Q20. The base of transistor Q20... The emitter of transistor Q22 is electrically connected to one end of resistor R20 and one end of resistor R21, respectively. The other end of resistor R20 is connected to the input control signal VA_C. The other end of resistor R21 and the emitter of transistor Q20 are both grounded. The emitter of transistor Q22 is electrically connected to the base of transistor Q21 and one end of resistor R24, respectively. The emitter of transistor Q10 is electrically connected to one end of resistor R25, one end of capacitor C20 and the other end of resistor R24, respectively, which is the test voltage output terminal. The other ends of resistor R25 and capacitor C20 are both grounded.

[0034] In actual use, when transistor Q20 is turned on and off, the test voltage output unit outputs voltages in different ranges. When transistor Q20 is turned on, the voltage output by the test voltage output unit is 4.4V, and when transistor Q20 is turned off, the voltage output by the test voltage output unit is 11.3V; thus, different voltage outputs are achieved.

[0035] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A control signal output circuit for fan controller testing, characterized by, The first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the voltage dividing unit, the resistors R1-R8 and the capacitor C1 are included. The input end of the first switch tube Q1 is electrically connected with the input end of the voltage dividing unit and one end of the resistor R5, and is used for inputting the power supply voltage VCC; the control end of the first switch tube Q1 is electrically connected with one voltage dividing node of the voltage dividing unit; the output end of the first switch tube Q1 is electrically connected with one end of the resistor R3, one end of the resistor R4 and one end of the capacitor C1; the other end of the resistor R4 and the other end of the capacitor C1 are both grounded; the other end of the resistor R3 is used for outputting the high-side drive signal; the output end of the voltage dividing unit is electrically connected with the input end of the second switch tube Q2; the control end of the second switch tube Q2 is electrically connected with one end of the resistor R1 and one end of the resistor R2; the other end of the resistor R1 is electrically connected with the other end of the resistor R7, and is used for inputting the control signal PWMC; the other end of the resistor R2 and the output end of the second switch tube Q2 are both grounded. The other end of the resistor R7 is electrically connected with the control end of the third switch tube Q3 and one end of the resistor R8; the other end of the resistor R8 and the output end of the third switch tube Q3 are both grounded; the input end of the third switch tube Q3 is electrically connected with the other end of the resistor R5 and one end of the resistor R6; the other end of the resistor R6 is used for outputting the low-side drive signal.

2. The control signal output circuit for testing a blower controller according to claim 1, wherein The voltage dividing unit includes the resistors R9 and R10 connected in series; one end of the resistor R9 is the input end of the voltage dividing unit; the other end of the resistor R9 is the voltage dividing node of the voltage dividing unit; and the other end of the resistor R10, which is not electrically connected with the resistor R9, is the output end of the voltage dividing unit.

3. The control signal output circuit for testing a blower controller according to claim 1, wherein The first over-current protection unit includes the fifth switch tube Q5 and the resistor R11; the input end of the fifth switch tube Q5 is electrically connected with the resistor R11, and is used for inputting the power supply voltage VCC; the control end of the fifth switch tube Q5 is electrically connected with the other end of the resistor R11 and the input end of the first switch tube Q1; and the output end of the second switch tube Q5 is electrically connected with the control end of the first switch tube Q1.

4. The control signal output circuit for testing a blower controller according to claim 3, wherein The fifth switch tube Q5 is a PNP type triode.

5. The control signal output circuit for testing a blower controller according to claim 1, wherein The second over-current protection unit includes the fourth switch tube Q4 and the resistor R12; the input end of the fourth switch tube Q4 is electrically connected with the control end of the third switch tube Q3; the control end of the fourth switch tube Q4 is electrically connected with one end of the resistor R12 and the output end of the third switch tube Q3; and the output end of the fourth switch tube Q4 and the other end of the resistor R12 are both grounded.

6. The control signal output circuit for testing a blower controller according to claim 5, wherein The fourth switch tube Q4 is an NPN type triode.

7. The control signal output circuit for testing a blower controller according to claim 1, wherein The first switch tube Q1 is a PNP type triode.

8. The control signal output circuit for testing a blower controller according to claim 1, wherein The second switch tube Q2 is an NPN type triode.

9. The control signal output circuit for testing a blower controller according to claim 1, wherein The third switch tube Q3 is an NPN type triode.

10. The control signal output circuit for testing a blower controller according to claim 1, wherein The test voltage output unit comprises a resistor R22, one end of the resistor R22 is electrically connected with one end of a resistor R23, and is used for inputting a power voltage VCC; the other end of the resistor R22 is electrically connected with a cathode of a Zener diode Z20, a cathode of a Zener diode Z21, a collector of a transistor Q21 and a base of a transistor Q22 respectively; the other end of the resistor R23 is electrically connected with a collector of the transistor Q22; an anode of the Zener diode Z20 is grounded; an anode of the Zener diode Z21 is electrically connected with a collector of the transistor Q20; a base of the transistor Q20 is electrically connected with one end of a resistor R20 and one end of a resistor R21 respectively; the other end of the resistor R20 is used for inputting a control signal VA_C; the other end of the resistor R21 and an emitter of the transistor Q20 are grounded; an emitter of the transistor Q22 is electrically connected with a base of the transistor Q21 and one end of a resistor R24 respectively; an emitter of the transistor Q10 is electrically connected with one end of a resistor R25, one end of a capacitor C20 and the other end of the resistor R24 respectively; the other end of the resistor R25 and the other end of the capacitor C20 are grounded, and the test voltage output unit is a test voltage output end.

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