Universal speed regulation control device for alternating-current and direct-current fans

Abstract

The utility model relates to the technical field of fan control, and discloses a universal speed regulation control device for an alternating current fan and a direct current fan, which is characterized by comprising a microcontroller, a temperature sampling module, an alternating current synchronization module, an alternating current fan driving module and a direct current fan driving module, the temperature sampling module, the alternating current synchronization module, the alternating current fan driving module and the direct current fan driving module are all connected with the microcontroller. The device can be universally used for alternating current and direct current fans, can automatically adjust the rotating speed or manually adjust the rotating speed according to the collected temperature, and has the effect of high practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of fan control, and particularly relates to a speed regulation control device that is universal for AC and DC fans. Background Art

[0002] The function of the cooling fan in an electric vehicle charging pile is to quickly dissipate the heat inside the charging pile to keep the temperature inside the charging pile stable and ensure that the charging pile can work normally.

[0003] In order to meet different heat dissipation requirements, different wind powers are needed. Therefore, the speed regulation control of the fan is particularly important. However, traditional speed regulation control devices are usually designed for specific types of fans and cannot achieve universal control of different types of fans. Therefore, developing a speed regulation control device that can be applied to AC and DC fans and achieve universal control is an urgent need in the current technical field. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a speed regulation control device that is universal for AC and DC fans, which can be used for both AC and DC fans, and can automatically adjust the speed according to the collected temperature or manually adjust the speed, with strong practicability.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: A speed regulation control device that is universal for AC and DC fans, including a microcontroller, a temperature sampling module, an AC synchronization module, an AC fan drive module, and a DC fan drive module. The temperature sampling module, the AC synchronization module, the AC fan drive module, and the DC fan drive module are all connected to the microcontroller;

[0006] The microcontroller is used to receive the temperature signal from the temperature sampling module and the synchronization signal from the AC synchronization module, and generate a phase-shifted trigger signal and a PWM signal to be provided to the AC fan drive module and the DC fan drive module respectively, so as to control the orderly operation of the device;

[0007] The temperature sampling module is used to provide a parameter basis for speed regulation to the microcontroller;

[0008] The AC synchronization module is used to provide a reference signal to the AC fan drive module;

[0009] The AC fan drive module is used to receive the phase-shifted trigger signal sent by the microcontroller and control the speed of the AC fan;

[0010] The DC fan drive module is used to receive the PWM signal sent by the microcontroller and control the speed of the DC fan.

[0011] By adopting the above technical solution, the speed of the AC fan is controlled by changing the terminal voltage of the fan; the DC fan has a PWM speed control signal control line, and its speed is changed by changing the duty cycle of the PWM signal. The temperature sampling module measures the ambient temperature and provides the microcontroller with the parameter basis for adjusting the fan speed. The AC synchronization module processes the AC sine wave into a square wave signal of the same frequency and inputs it into the microcontroller to provide a reference signal for the AC fan drive module. The microcontroller generates a phase-shifted trigger signal according to the synchronization signal and the sampled temperature value and inputs it into the AC fan drive module to change the voltage value of the AC fan, thereby controlling the speed of the AC fan. The microcontroller generates PWM signals with different duty cycles according to the sampled temperature value to change the speed of the DC fan.

[0012] A further setting of the present utility model is that: the temperature sampling module includes two temperature ADC sampling units. Each temperature ADC sampling unit includes a resistor R1, a capacitor C1, and a temperature probe. One end of the resistor R1 is connected to the positive pole of the DC power supply, the other end of the resistor R1 is connected to one end of the capacitor C1 and is connected to the microcontroller, the other end of the capacitor C1 is grounded, and the temperature probe is connected in parallel with the capacitor C1.

[0013] By adopting the above technical solution, the temperature probe measures the temperature and inputs the temperature data into the microcontroller to provide the parameter basis for speed regulation for the microcontroller. Setting the temperature ADC sampling unit to two paths can measure the temperatures at different points, making the control strategy more flexible and variable.

[0014] A further setting of the present utility model is that: the AC synchronization module includes an optocoupler 6N139. The second pin of the optocoupler 6N139 is connected to the live wire end of the AC power input through a resistor R2, the third pin of the optocoupler 6N139 is connected to the neutral wire end of the AC power input, a diode D1 is connected between the second pin and the third pin of the optocoupler 6N139. The anode of the diode D1 is connected to the third pin, and the cathode of the diode D1 is connected to the end of the resistor R2 close to the second pin. The fifth pin of the optocoupler 6N139 is grounded, the seventh pin of the optocoupler 6N139 is grounded through a resistor R3, the eighth pin of the optocoupler 6N139 is connected to the positive pole of the power supply through a resistor R4, the sixth pin of the optocoupler 6N139 is connected to the microcontroller through a resistor R5. One end of the resistor R5 close to the sixth pin is connected to the positive pole of the power supply through a resistor R6, and the end of the resistor R5 close to the microcontroller is connected to one end of a capacitor C2, and the other end of the capacitor C2 is grounded.

[0015] By adopting the above technical solution, the AC power supply connected to the AC fan is 220V. After the optocoupler 6N139 shapes the 220V AC power, it outputs a square wave signal with the same frequency and phase, and an amplitude of DC5V. On the one hand, it isolates the high and low voltages, and on the other hand, the square wave signal provides a control reference for the microcontroller.

[0016] The further setting of the present utility model is: the AC fan drive module includes an optocoupler MOC3052. The first pin of the optocoupler MOC3052 is connected to the positive power supply through a resistor R7. The second pin of the optocoupler MOC3052 is connected to the collector of the NPN transistor Q1. The base of the NPN transistor Q1 is connected to the microcontroller through a resistor R8. The emitter of the NPN transistor Q1 is grounded. The fourth pin of the optocoupler MOC3052 is connected to the control electrode of the thyristor BTA16. The main electrode T1 of the thyristor BTA16 is connected to the sixth pin of the optocoupler MOC3052 through a resistor R9. The main electrode T1 of the thyristor BTA16 is connected to the live wire end of the AC power input. The main electrode T2 of the thyristor BTA16 is connected to the neutral wire end of the AC input power supply through the AC fan. The main electrode T1 of the thyristor BTA16 is connected to one end of a capacitor C3. The other end of the capacitor C3 is connected to one end of a resistor R10. The other end of the resistor R10 is connected to the main electrode T2 of the thyristor BTA16.

[0017] By adopting the above technical solution, the microcontroller generates a phase-shifted trigger signal according to the synchronization signal from the AC synchronization module and the temperature value from the temperature sampling module, and inputs it into the optocoupler MOC3052, thereby driving the thyristor BTA16. By changing the conduction angle of the thyristor, the voltage value across the AC fan is changed, so as to control the rotation speed of the AC fan.

[0018] The further setting of the present utility model is: the DC fan drive module includes an NPN transistor Q2. The base of the NPN transistor Q2 is connected to the microcontroller through a resistor R11. The emitter of the NPN transistor Q2 is grounded. The collector of the NPN transistor Q2 is connected to the positive power supply through a resistor R12. One end of the resistor R12 connected to the collector of the NPN transistor Q2 is connected to a DC fan, and the DC fan is connected to a DC power supply.

[0019] By adopting the above technical solution, the microcontroller generates PWM signals with different duty cycles according to the sampled temperature value, and then controls the rotation speed of the DC fan.

[0020] The further setting of the present utility model is: the AC power supply is AC220V, and the DC power supply is DC12V or DC24V.

[0021] A further setting of the present utility model is that a potentiometer is provided on the device, and both the DC fan and the AC fan are connected to the potentiometer.

[0022] By adopting the above technical solution, the rotation speeds of the DC fan and the AC fan can be changed by controlling the potentiometer, realizing manual control.

[0023] The beneficial effects of the present utility model are as follows:

[0024] 1. By designing a microcontroller, a temperature sampling module, an AC synchronization module, an AC fan drive module, and a DC fan drive module, the present utility model can not only control the rotation speed of the DC fan but also control the rotation speed of the AC fan.

[0025] 2. In the present utility model, the rotation speeds of the DC and AC fans can be automatically adjusted by the microcontroller according to the collected temperature.

[0026] 3. The present utility model can manually adjust the rotation speeds of the DC fan and the AC fan through the potentiometer provided on the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is the module structure diagram of the present utility model.

[0029] Figure 2 It is the electrical schematic diagram of the present utility model.

[0030] In the figure, 1. Microcontroller; 2. Temperature sampling module; 21. Temperature probe; 3. AC synchronization module; 4. AC fan drive module; 5. DC fan drive module; 6. AC fan; 7. DC fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions of the present utility model in combination with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0032] Embodiment: Please refer to Figure 1 、 Figure 2, A speed control device applicable to both AC and DC fans, comprising a microcontroller 1, a temperature sampling module 2, an AC synchronization module 3, a driving module 4 for an AC fan 6, and a driving module 5 for a DC fan 7. The temperature sampling module 2, the AC synchronization module 3, the driving module 4 for the AC fan 6, and the driving module 5 for the DC fan 7 are all connected to the microcontroller 1. The microcontroller 1 is configured to receive the temperature signal from the temperature sampling module 2 and the synchronization signal from the AC synchronization module 3, and generate a phase-shifted trigger signal and a PWM signal respectively for the driving module 4 for the AC fan 6 and the driving module 5 for the DC fan 7, so as to control the orderly operation of the device. The temperature sampling module 2 is used to provide a parameter basis for speed regulation for the microcontroller 1. The AC synchronization module 3 is used to provide a reference signal for the driving module 4 for the AC fan 6. The driving module 4 for the AC fan 6 is used to receive the phase-shifted trigger signal sent by the microcontroller 1 and control the speed of the AC fan 6. The driving module 5 for the DC fan 7 is used to receive the PWM signal sent by the microcontroller 1 and control the speed of the DC fan 7.

[0033] In specific implementation, the speed of the AC fan 6 is controlled by changing the terminal voltage of the fan. The DC fan 7 has a PWM speed regulation signal control line, and its speed is changed by changing the duty cycle of the PWM signal. The temperature sampling module 2 measures the ambient temperature and provides a parameter basis for the microcontroller 1 to adjust the fan speed. The AC synchronization module 3 processes the AC sine wave into a square wave signal of the same frequency and inputs it into the microcontroller 1 to provide a reference signal for the driving module 4 for the AC fan 6. The microcontroller 1 generates a phase-shifted trigger signal according to the synchronization signal and the sampled temperature value and inputs it into the driving module 4 for the AC fan 6 to change the voltage value of the AC fan 6, thereby controlling the speed of the AC fan 6. The microcontroller 1 generates PWM signals with different duty cycles according to the sampled temperature value to change the speed of the DC fan 7.

[0034] The temperature sampling module 2 includes two temperature ADC sampling units. Each temperature ADC sampling unit includes a resistor R1, a capacitor C1, and a temperature probe 21. One end of the resistor R1 is connected to the positive pole of the DC power supply. The other end of the resistor R1 is connected to one end of the capacitor C1 and is also connected to the microcontroller 1. The other end of the capacitor C1 is grounded. The temperature probe 21 is arranged in parallel with the capacitor C1.

[0035] In specific implementation, the temperature probe 21 measures the temperature and inputs the temperature data into the microcontroller 1 to provide a parameter basis for speed regulation for the microcontroller 1. By setting the temperature ADC sampling unit to two channels, the temperatures at different points can be measured, such as the ambient temperature and the temperature on the power module, making the control strategy more flexible and variable.

[0036] The AC synchronous module 3 includes an optocoupler 6N139. The second pin of the optocoupler 6N139 is connected to the live wire terminal of the AC power input through a resistor R2. The third pin of the optocoupler 6N139 is connected to the neutral wire terminal of the AC power input. A diode D1 is connected between the second pin and the third pin of the optocoupler 6N139. The anode of the diode D1 is connected to the third pin, and the cathode of the diode D1 is connected to the end of the resistor R2 close to the second pin. The fifth pin of the optocoupler 6N139 is grounded. The seventh pin of the optocoupler 6N139 is grounded through a resistor R3. The eighth pin of the optocoupler 6N139 is connected to the positive power supply through a resistor R4. The sixth pin of the optocoupler 6N139 is connected to the microcontroller 1 through a resistor R5. The end of the resistor R5 close to the sixth pin is connected to the positive power supply through a resistor R6. The end of the resistor R5 close to the microcontroller 1 is connected to one end of a capacitor C2, and the other end of the capacitor C2 is grounded.

[0037] In specific implementation, the AC power supply connected to the AC fan 6 is 220V. After the optocoupler 6N139 shapes the same 220V AC power, it outputs a square wave signal with the same frequency and phase, and an amplitude of DC5V. On the one hand, it isolates the high and low voltages, and on the other hand, the square wave signal provides a control reference for the microcontroller 1.

[0038] The driving module 4 of the AC fan 6 includes an optocoupler MOC3052. The first pin of the optocoupler MOC3052 is connected to the positive power supply through a resistor R7. The second pin of the optocoupler MOC3052 is connected to the collector of an NPN transistor Q1. The base of the NPN transistor Q1 is connected to the microcontroller 1 through a resistor R8. The emitter of the NPN transistor Q1 is grounded. The fourth pin of the optocoupler MOC3052 is connected to the control electrode of a thyristor BTA16. The main electrode T1 of the thyristor BTA16 is connected to the sixth pin of the optocoupler MOC3052 through a resistor R9. The main electrode T1 of the thyristor BTA16 is connected to the live wire terminal of the AC power input. The main electrode T2 of the thyristor BTA16 is connected to the neutral wire terminal of the AC input power supply through the AC fan 6. The main electrode T1 of the thyristor BTA16 is connected to one end of a capacitor C3, and the other end of the capacitor C3 is connected to one end of a resistor R10. The other end of the resistor R10 is connected to the main electrode T2 of the thyristor BTA16.

[0039] In specific implementation, the microcontroller 1 generates a phase-shifted trigger signal according to the synchronization signal from the AC synchronous module 3 and the temperature value from the temperature sampling module 2, and inputs it into the optocoupler MOC3052, thereby driving the thyristor BTA16. By changing the conduction angle of the thyristor, the voltage value across the AC fan 6 is changed, so as to control the rotation speed of the AC fan 6.

[0040] The DC fan 7 drive module 5 includes an NPN transistor Q2. The base of the NPN transistor Q2 is connected to the microcontroller 1 via a resistor R11. The emitter of the NPN transistor Q2 is grounded. The collector of the NPN transistor Q2 is connected to the positive power supply via a resistor R12. One end of the resistor R12 connected to the collector of the NPN transistor Q2 is connected to the DC fan 7, and the DC fan 7 is connected to the DC power supply.

[0041] In specific implementation, the microcontroller 1 generates PWM signals with different duty cycles according to the sampled temperature values, and then controls the rotation speed of the DC fan 7.

[0042] Furthermore, the AC power supply is AC220V, and the DC power supply is DC12V or DC24V.

[0043] A potentiometer is provided on the device. Both the DC fan 7 and the AC fan 6 are connected to the potentiometer. The rotation speeds of the DC fan 7 and the AC fan 6 can be changed by controlling the potentiometer to achieve manual control.

Claims

1. A speed control device applicable to both AC and DC fans, characterized in that: It includes a microcontroller (1), a temperature sampling module (2), an AC synchronization module (3), a driving module (4) for an AC fan (6), and a driving module (5) for a DC fan (7). The temperature sampling module (2), the AC synchronization module (3), the driving module (4) for the AC fan (6), and the driving module (5) for the DC fan (7) are all connected to the microcontroller (1). The microcontroller (1) is configured to receive the temperature signal from the temperature sampling module (2) and the synchronization signal from the AC synchronization module (3), and generate a phase-shifted trigger signal and a PWM signal to be provided to the driving module (4) for the AC fan (6) and the driving module (5) for the DC fan (7) respectively, so as to control the orderly operation of the device. The temperature sampling module (2) is configured to provide a parameter basis for speed regulation for the microcontroller (1). The AC synchronization module (3) is configured to provide a reference signal for the driving module (4) for the AC fan (6). The driving module (4) for the AC fan (6) is configured to receive the phase-shifted trigger signal sent by the microcontroller (1) and control the rotation speed of the AC fan (6). The driving module (5) for the DC fan (7) is configured to receive the PWM signal sent by the microcontroller (1) and control the rotation speed of the DC fan (7).

2. The speed control device for AC and DC fans as claimed in claim 1, characterized in that: The temperature sampling module (2) includes two temperature ADC sampling units. Each temperature ADC sampling unit includes a resistor R1, a capacitor C1, and a temperature probe (21). One end of the resistor R1 is connected to the positive pole of the DC power supply, the other end of the resistor R1 is connected to one end of the capacitor C1 and is connected to the microcontroller (1), the other end of the capacitor C1 is grounded, and the temperature probe (21) is arranged in parallel with the capacitor C1.

3. The speed control device for AC and DC fans as claimed in claim 1, characterized in that: The AC synchronization module (3) includes an optocoupler 6N139. The second pin of the optocoupler 6N139 is connected to the live wire end of the AC power supply input through a resistor R2. The third pin of the optocoupler 6N139 is connected to the neutral wire end of the AC power supply input. A diode D1 is connected between the second pin and the third pin of the optocoupler 6N139. The anode of the diode D1 is connected to the third pin, and the cathode of the diode D1 is connected to the end of the resistor R2 close to the second pin. The fifth pin of the optocoupler 6N139 is grounded. The seventh pin of the optocoupler 6N139 is grounded through a resistor R3. The eighth pin of the optocoupler 6N139 is connected to the positive pole of the power supply through a resistor R4. The sixth pin of the optocoupler 6N139 is connected to the microcontroller (1) through a resistor R5. The end of the resistor R5 close to the sixth pin is connected to the positive pole of the power supply through a resistor R6. The end of the resistor R5 close to the microcontroller (1) is connected to one end of a capacitor C2, and the other end of the capacitor C2 is grounded.

4. The speed control device for AC and DC fans as claimed in claim 3, wherein: The AC fan (6) driving module (4) includes an optocoupler MOC3052. The first pin of the optocoupler MOC3052 is connected to the positive power supply through a resistor R7. The second pin of the optocoupler MOC3052 is connected to the collector of an NPN transistor Q1. The base of the NPN transistor Q1 is connected to the microcontroller (1) through a resistor R8. The emitter of the NPN transistor Q1 is grounded. The fourth pin of the optocoupler MOC3052 is connected to the control electrode of a thyristor BTA16. The main electrode T1 of the thyristor BTA16 is connected to the sixth pin of the optocoupler MOC3052 through a resistor R9. The main electrode T1 of the thyristor BTA16 is connected to the live wire end of the AC power input. The main electrode T2 of the thyristor BTA16 is connected to the neutral wire end of the AC input power supply through the AC fan (6). The main electrode T1 of the thyristor BTA16 is connected to one end of a capacitor C3. The other end of the capacitor C3 is connected to one end of a resistor R10. The other end of the resistor R10 is connected to the main electrode T2 of the thyristor BTA16.

5. The speed control device for AC and DC fans as claimed in claim 4, characterized in that: The DC fan (7) driving module (5) includes an NPN transistor Q2. The base of the NPN transistor Q2 is connected to the microcontroller (1) through a resistor R11. The emitter of the NPN transistor Q2 is grounded. The collector of the NPN transistor Q2 is connected to the positive power supply through a resistor R12. One end of the resistor R12 connected to the collector of the NPN transistor Q2 is connected to a DC fan (7). The DC fan (7) is connected to a DC power supply.

6. The speed control device for AC and DC fans as claimed in claim 5, wherein: The AC power supply is AC220V, and the DC power supply is DC12V or DC24V.

7. A speed control device applicable to both AC and DC fans according to claim 1, characterized in that: A potentiometer is provided on the device. Both the DC fan (7) and the AC fan (6) are connected to the potentiometer.

Images