CN215580963U - Speed regulating circuit of alternating current motor fan - Google Patents
Speed regulating circuit of alternating current motor fan Download PDFInfo
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- CN215580963U CN215580963U CN202121888088.7U CN202121888088U CN215580963U CN 215580963 U CN215580963 U CN 215580963U CN 202121888088 U CN202121888088 U CN 202121888088U CN 215580963 U CN215580963 U CN 215580963U
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Abstract
The utility model relates to a speed regulation circuit of an alternating current motor fan, which comprises a filter circuit, a speed regulation signal input circuit and a speed regulation module, wherein the speed regulation module comprises a chip circuit and a driving and power output circuit, the chip circuit is provided with a speed regulation control chip, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip is also provided with a pulse width modulation signal pin, a grounding pin and a power supply voltage pin, the H-bridge motor driving circuit is also provided with an alternating current output end, and the alternating current output end is electrically connected with the alternating current fan motor. The utility model adopts a circuit with a speed regulating module, combines a pulse width modulation signal pin and mechanical or electronic resistance regulation to realize stepless regulation or multi-gear regulation of the rotating speed of the alternating current fan motor, thereby improving the regulation range of air quantity and the comfort of the fan.
Description
Technical Field
The utility model relates to a speed regulating circuit, in particular to a speed regulating circuit of an alternating current motor fan.
Background
The existing household fan main motors are generally divided into two types, one type is driven by a direct current motor, and the other type is driven by an alternating current motor; the direct current motor can easily realize stepless speed regulation, realizes low-speed silent running and starting of the fan, and has good use feeling, but the cost is higher based on the direct current motor, so that the price of the fan is correspondingly improved. The fan driven by the alternating current motor is difficult to realize stepless speed regulation or multi-gear speed regulation, and is difficult to realize low-speed silent operation and starting.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a speed regulating circuit of an alternating current motor fan, which has a reasonable structure, can realize stepless regulation or multi-gear regulation and improves the running smoothness of an alternating current motor.
The purpose of the utility model is realized as follows:
the utility model provides a speed governing circuit of alternating current motor fan, includes filter circuit and speed governing signal input circuit, its characterized in that: the speed regulation device comprises a speed regulation module, wherein the speed regulation module comprises a chip circuit and a driving and power output circuit, the chip circuit is provided with a speed regulation control chip, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip and the H-bridge motor driving circuit are both provided with alternating current input ends, the speed regulation control chip is also provided with a pulse width modulation signal pin, a grounding pin and a power supply voltage pin, the H-bridge motor driving circuit is also provided with an alternating current output end, the alternating current output end is electrically connected with an alternating current fan motor, the grounding pin and the power supply voltage pin are connected through an electrolytic capacitor, the grounding pin and the pulse width modulation signal pin form a control input signal end, and the control input signal end is electrically connected with the speed regulation signal input circuit; the speed regulating signal input circuit is a mechanical speed regulating signal input circuit or an electronic speed regulating signal input circuit, and the mechanical speed regulating signal input circuit is directly or indirectly electrically connected with the control input signal end.
The aim of the utility model can also be solved by the following technical measures:
as a more specific scheme, the mechanical speed regulation signal input circuit comprises an adjustable resistor, and the adjustable resistor is connected between the grounding pin and the pulse width modulation signal pin; or an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, the optical coupling circuit is connected with the main control chip through a pulse width modulation signal, and the main control chip is electrically connected with the adjustable resistor.
As a further scheme, a mechanical timing switch is connected to the outside of the power input end of the filter circuit.
As a further another scheme, the electronic speed-regulating signal input circuit comprises a main control chip, a speed-regulating inching switch and a resistor, wherein the speed-regulating inching switch is electrically connected with the main control chip through the resistor, an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, and the optical coupling circuit is connected with the main control chip through a pulse width modulation signal; or, the electronic speed regulation signal input circuit comprises a main control chip, a coding switch and a resistor, the speed regulation coding switch is electrically connected with the main control chip through the resistor, an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, and the optical coupling circuit is connected with the main control chip through a pulse width modulation signal.
As a further scheme, a switching power supply circuit is connected outside the output end of the filter circuit and is in power supply connection with the main control chip.
As a further scheme, the main control chip is also electrically connected with a start-stop switch, a head shaking switch, a timing adjusting switch, a head shaking motor control circuit and a display circuit.
As a further scheme, the main control chip is further electrically connected with a voice reminding circuit and/or a wireless receiving circuit.
As a further scheme, the model of the speed regulation control chip is KP86201 KGA; the model of the main control chip is CMS79F 116.
As a further scheme, the adjustable resistor is a knob type adjustable resistor or a sliding type adjustable resistor.
As a further scheme, the alternating current motor fan comprises an alternating current fan motor, a motor cover, fan blades, a mesh enclosure, a support rod and a base, wherein the motor cover and the base are respectively arranged at the upper end and the lower end of the support rod, the alternating current fan motor is arranged in the motor cover, the fan blades are arranged in the mesh enclosure and are in transmission connection with the alternating current fan motor, and the mesh enclosure is connected with the motor cover.
The utility model has the following beneficial effects:
(1) the utility model adopts a circuit with a speed regulating module, combines a pulse width modulation signal pin and mechanical or electronic resistance regulation to realize stepless regulation or multi-gear regulation of the rotating speed of the alternating current fan motor, thereby improving the regulation range of air quantity and the comfort of the fan.
(2) The utility model is mainly used in the fields of floor fans, desk fans and the like with alternating current motors, and in addition, the stepless speed regulation is realized by adopting the knob, the speed regulation realizes continuous change, and the operation is more convenient.
Drawings
FIG. 1 is a circuit diagram according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of another embodiment of the present invention.
FIG. 3 is a circuit diagram of another embodiment of the present invention.
Fig. 4 is a circuit diagram of the speed regulating module of the present invention.
Detailed Description
The utility model is further described with reference to the following figures and examples.
Example one
Referring to fig. 1 and 4, a speed regulation circuit of an ac motor fan includes a filter circuit 1 and a speed regulation signal input circuit, and further includes a speed regulation module 2, the speed regulation module includes a chip circuit 21 and a driving and power output circuit 22, the chip circuit 21 is provided with a speed regulation control chip U1, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip and the H-bridge motor driving circuit are both provided with an ac input terminal, the speed regulation control chip is further provided with a pulse width modulation signal pin (PWM pin), a ground pin (GND pin) and a power voltage pin (VCC pin/VDD pin), the H-bridge motor driving circuit is further provided with an ac output terminal, the ac output terminal is used for electrically connecting with an ac fan motor M, the ground pin is connected with the power voltage pin through an electrolytic capacitor EC5, the grounding pin and the pulse width modulation signal pin form a control input signal end, and the control input signal end is electrically connected with the speed regulation signal input circuit.
The alternating current input end comprises a live wire input pin L (ACL), a zero line input pin N (ACN), the alternating current output end comprises a live wire output pin OUTL and a zero line output pin OUTN, and the speed regulation control chip U1 is KP86201KGA in model.
Referring to fig. 4, the H-bridge motor driving circuit includes four NMOS transistors Q1-Q4, resistors R1-R6; the chip circuit 21 comprises the speed regulation control chip U1, a rectifier bridge DB1, resistors R7-R12 and capacitors C1-C5.
The speed regulating signal input circuit is a mechanical speed regulating signal input circuit 3, and the mechanical speed regulating signal input circuit 3 is directly electrically connected with the control input signal end.
The mechanical speed regulation signal input circuit 3 comprises an adjustable resistor VR1, and an adjustable resistor VR1 is connected between the GND pin and the PWM pin. Particularly, resistors R19 and R20 are arranged between the VR1 and the GND pin and between the VR1 and the PWM pin. The adjustable resistor VR1 is a knob type adjustable resistor.
And a mechanical timing switch 4 is connected to the outside of the power input end of the filter circuit 1. The power input end comprises CAN and ACL, and the mechanical timing switch 4 is connected to the ACL.
In fig. 1, F1 is a fuse, ZR is a voltage dependent resistor, MC1 is an ampere-capacitor, MC2 is a CBB capacitor, R21 and R24 are resistors, L3 is a common mode inductor, CY1 and CY2 are Y1 capacitors, and PE is a ground (connected to a metal housing of a motor).
The marks beside each electronic component also include parameters thereof, specifically based on the circuit.
Alternating current motor fan mainly is applied to floor fan, and it includes alternating current fan motor, motor cover, fan blade, screen panel, bracing piece and base, motor cover and base set up the upper and lower both ends at the bracing piece respectively, and alternating current fan motor sets up in the motor cover, and the fan blade setting is in the screen panel and is connected with alternating current fan motor transmission, and the screen panel is connected with the motor cover, and not shown in the figure.
The working principle is as follows: voltage working range of the power input terminal: 90 Vac-265 Vac, 50Hz/60 Hz. The mechanical timing switch 4 can be used as a main switch and a timing switch and can be turned off at a timing of 0-120 minutes. When a 220VAC power supply is plugged, stepless speed regulation can be realized through the knob type adjustable resistor under the opening state of the mechanical timing switch, and arbitrary speed regulation can be realized from 0% to 100%. The forward rotation speed of the knob type adjustable resistor is increased, and the backward rotation speed is reduced.
Example two
Referring to fig. 2 and 4, a speed regulation circuit 100 of an ac motor fan comprises a filter circuit 1 and a speed regulation signal input circuit, and further comprises a speed regulation module 2, the speed regulation module comprises a chip circuit 21 and a driving and power output circuit 22, the chip circuit 21 is provided with a speed regulation control chip U1, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip and the H-bridge motor driving circuit are both provided with an ac input terminal, the speed regulation control chip is further provided with a pulse width modulation signal pin (PWM pin), a ground pin (GND pin) and a power voltage pin (VCC pin/VDD pin), the H-bridge motor driving circuit is further provided with an ac output terminal, the ac output terminal is used for electrically connecting with an ac fan motor M, the ground pin is connected with the power voltage pin through an electrolytic capacitor EC5, the grounding pin and the pulse width modulation signal pin form a control input signal end, and the control input signal end is electrically connected with the speed regulation signal input circuit.
The alternating current input end comprises a live wire input pin L (ACL), a zero line input pin N (ACN), the alternating current output end comprises a live wire output pin OUTL and a zero line output pin OUTN, and the speed regulation control chip U1 is KP86201KGA in model.
Referring to fig. 4, the H-bridge motor driving circuit includes four NMOS transistors Q1-Q4, resistors R1-R6; the chip circuit 21 comprises the speed regulation control chip U1, a rectifier bridge DB1, resistors R7-R12 and capacitors C1-C5.
The speed regulating signal input circuit is an electronic speed regulating signal input circuit, and the electronic speed regulating signal input circuit is indirectly electrically connected with the control input signal end.
Be equipped with opto-coupler circuit 12 between GND pin and the PWM pin, opto-coupler circuit 12 is connected through pulse width modulation signal with main control chip 6 and is carried out the speed governing, SW1, SW2 control end and the coding switch VR1 electric connection of main control chip 6 (IC 1). The model of the master control chip IC1 is CMS79F116, and a capacitor C2 and an electrolytic capacitor EC4 are arranged on the master control chip IC 1. And a resistor R9, a resistor R10, a capacitor C9 and a capacitor C10 are further arranged between the encoding switch VR1 and the control ends of the SW1 and the SW 2. The optical coupler circuit 12 is provided with an optical coupler P1 (model is EL 817) and a resistor R19.
The encoding switch VR1 is a knob type pulse switch.
The output end of the filter circuit 1 is also connected with a switch power supply circuit 7, and the switch power supply circuit 7 is in power supply connection with a main control chip IC 1.
In the filter circuit 1, F1 is a fuse, ZR is a voltage dependent resistor, MC1 is an ampere-standard capacitor, MC2 is a CBB capacitor, R21 and R24 are resistors, L3 is a common mode inductor, CY1 and CY2 are Y1 capacitors, and PE is a ground terminal (connected with a metal shell of the motor). The switching power supply circuit 7 is provided with a power supply management chip U2 (model number is AP 8504), resistors R22 and R22, diodes D1 and D2, electrolytic capacitors EC1, EC2 and EC3, inductors L1 and L2 and capacitors C1 and C4.
The main control chip IC1 is also electrically connected with a switch control circuit 5, a head shaking motor control circuit 11, a display circuit 8, a sound reminding circuit 9 and a wireless receiving circuit 10; the switch control circuit 5 is provided with a start-stop switch K1 (ON/OFF switch key), a swing switch K4 (OSC swing key), and a timing adjustment switch K5 (TIMER timing key), which are electrically connected to corresponding pin terminals of the main control chip IC1 through resistors R8, R11, and R12, respectively.
The head shaking motor control circuit 11 is provided with a bidirectional thyristor T1 and a resistor R16, and the bidirectional thyristor T1 is provided with an OSC pin for electrically connecting with a head shaking motor; the display circuit 8 is provided with a double-bit digital display tube DP1 and resistors R1-R7; the sound reminding circuit 9 is provided with a buzzer BUZ and a resistor R15; the wireless receiving circuit 10 is provided with an infrared receiving head REC, resistors R13 and R14, a capacitor C3 and an electrolytic capacitor C6.
The marks beside each electronic component also include parameters thereof, specifically based on the circuit.
Alternating current motor fan mainly is applied to the floor fan, and it includes alternating current fan motor, motor cover, fan blade, screen panel, bracing piece and base, motor cover and base set up the upper and lower both ends at the bracing piece respectively, and alternating current fan motor sets up in the motor cover, and the fan blade setting is in the screen panel and is connected with alternating current fan motor transmission, and the screen panel is connected with the motor cover, still is equipped with the oscillating motor between alternating current fan motor and the bracing piece, and not shown in the figure.
The working principle is as follows: voltage working range of the power input terminal: 90 Vac-265 Vac, 50Hz/60 Hz. Pressing ON/OFF switch key in shutdown state, buzzer Bi-prompting operation success, fan entering 4 wind-blocking work; when the ON/OFF switch key is pressed in the power-ON state, the buzzer Bi-prompts the operation to be successful, and the fan is powered OFF. Rotating the knob type adjustable resistor switch in a starting (or reserving) state to set the wind speed of the adjusting fan, prompting the operation by a buzzer Bi-' sound, changing the wind speed in sequence in a circulating way, displaying the wind speed by a nixie tube, and pressing the key in a shutdown state to be invalid; wherein, the wind speed gear is 1-24 gears.
When the machine is started, the head-swinging key is pressed to set whether the head-swinging works or not, and the buzzer Bi prompts the success of operation.
When the TIMER is pressed in the starting state, the timing shutdown time can be set, the timing time is gradually increased once the TIMER is pressed, the TIMER is pressed again until the maximum timing value is reached, the TIMER is released, and when the TIMER is pressed, the buzzer Bi prompts that the operation is successful. And after the timing key is pressed, timing is started according to the setting, and the automatic shutdown is carried out after the timing time is up. Pressing the TIMER timing key in the power-off state can set the reserved power-on time, and the principle is the same as the above.
EXAMPLE III
Referring to fig. 3, a speed regulation circuit 100 of an ac motor fan includes a filter circuit 1 and a speed regulation signal input circuit, and further includes a speed regulation module 2, the speed regulation module includes a chip circuit 21 and a driving and power output circuit 22, the chip circuit 21 is provided with a speed regulation control chip U1, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip and the H-bridge motor driving circuit are both provided with an ac input terminal, the speed regulation control chip is further provided with a pulse width modulation signal pin (PWM pin), a ground pin (GND pin) and a power voltage pin (VCC pin/VDD pin), the H-bridge motor driving circuit is further provided with an ac output terminal, the ac output terminal is used for electrically connecting with an ac fan motor M, the ground pin and the power voltage pin are connected through an electrolytic capacitor EC5, the grounding pin and the pulse width modulation signal pin form a control input signal end, and the control input signal end is electrically connected with the speed regulation signal input circuit.
The alternating current input end comprises a live wire input pin L (ACL), a zero line input pin N (ACN), the alternating current output end comprises a live wire output pin OUTL and a zero line output pin OUTN, and the speed regulation control chip U1 is KP86201KGA in model.
Referring to fig. 4, the H-bridge motor driving circuit includes four NMOS transistors Q1-Q4, resistors R1-R6; the chip circuit 21 comprises the speed regulation control chip U1, a rectifier bridge DB1, resistors R7-R12 and capacitors C1-C5.
The speed regulating signal input circuit is an electronic speed regulating signal input circuit.
The electronic speed regulation signal input circuit comprises a main control chip 13 (IC 1) and a key control circuit 15, wherein the key control circuit 15 is provided with a speed regulation inching switch K2 (SPD wind speed key) and a resistor R9, the speed regulation inching switch is electrically connected with the main control chip through a resistor, an optical coupling circuit 12 is arranged between a GND pin and a PWM pin, and the optical coupling circuit 12 is connected with the main control chip through a pulse width modulation signal. The model of the master control chip IC1 is CMS79F116, and a capacitor C2 and an electrolytic capacitor EC4 are arranged on the master control chip IC 1.
The output end of the filter circuit 1 is also connected with a switch power supply circuit 7, and the switch power supply circuit 7 is in power supply connection with a main control chip IC 1.
In the filter circuit 1, F1 is a fuse, ZR is a voltage dependent resistor, MC1 is an ampere-standard capacitor, MC2 is a CBB capacitor, R21 and R24 are resistors, L3 is a common mode inductor, CY1 and CY2 are Y1 capacitors, and PE is a ground terminal (connected with a metal shell of the motor). The switching power supply circuit 7 is provided with a power supply management chip U2 (model number is AP 8504), resistors R22 and R22, diodes D1 and D2, electrolytic capacitors EC1, EC2 and EC3, inductors L1 and L2 and capacitors C1 and C4.
The main control chip IC1 is also electrically connected with a switch control circuit 5, a head shaking motor control circuit 11, a display circuit 8, a sound reminding circuit 9 and a wireless receiving circuit 10; the key control circuit 15 is provided with a start/stop switch K1 (ON/OFF switch key), a mute start switch K3 (LL mute key), a head shaking switch K4 (OSC head shaking key), and a timing adjustment switch K5 (TIMER timing key), which are electrically connected to corresponding pin terminals of the main control chip IC1 through resistors R8, R10, R11, and R12, respectively.
The head shaking motor control circuit 11 is provided with a bidirectional thyristor T1 and a resistor R16, and the bidirectional thyristor T1 is provided with an OSC pin for electrically connecting with a head shaking motor; the display circuit 8 is provided with a unit digital display tube DP1 and resistors R1-R7; the sound reminding circuit 9 is provided with a buzzer BUZ and a resistor R15; the wireless receiving circuit 10 is provided with an infrared receiving head REC, resistors R13 and R14, a capacitor C3 and an electrolytic capacitor C6.
The marks beside each electronic component also include parameters thereof, specifically based on the circuit.
Alternating current motor fan mainly is applied to the floor fan, and it includes alternating current fan motor, motor cover, fan blade, screen panel, bracing piece and base, motor cover and base set up the upper and lower both ends at the bracing piece respectively, and alternating current fan motor sets up in the motor cover, and the fan blade setting is in the screen panel and is connected with alternating current fan motor transmission, and the screen panel is connected with the motor cover, still is equipped with the oscillating motor between alternating current fan motor and the bracing piece, and not shown in the figure.
The working principle is as follows: voltage working range of the power input terminal: 90 Vac-265 Vac, 50Hz/60 Hz. Pressing ON/OFF switch key in shutdown state, buzzer Bi-prompting operation success, fan entering 4 wind-blocking work; when the ON/OFF switch key is pressed in the power-ON state, the buzzer Bi-prompts the operation to be successful, and the fan is powered OFF. When the SPD wind speed key is pressed in the starting (or reserving) state, the wind speed of the fan can be set and adjusted, the buzzer Bi-tone prompts the operation to be successful, and the operation is changed in 1-7 steps in a circulating mode, the nixie tube displays the wind speed, and the pressing of the SPD wind speed key in the shutdown state is invalid.
When the power-on state is started, the LL mute key is pressed, the buzzer Bi-prompts the operation to be successful, the fan enters the lowest wind to work, then the fan is pressed to exit the mute gear and return to the original working gear, and when the power-off state is started, the key is pressed to be invalid.
When the machine is started, the head-swinging key is pressed to set whether the head-swinging works or not, and the buzzer Bi prompts the success of operation.
When the TIMER is pressed in the starting state, the timing shutdown time can be set, the timing time is gradually increased once the TIMER is pressed, the TIMER is pressed again until the maximum timing value is reached, the TIMER is released, and when the TIMER is pressed, the buzzer Bi prompts that the operation is successful. And after the timing key is pressed, timing is started according to the setting, and the automatic shutdown is carried out after the timing time is up. Pressing the TIMER timing key in the power-off state can set the reserved power-on time, and the principle is the same as the above.
In the above three embodiments, the components and the connection manner of the circuit are only illustrated, and it still falls into the protection scope of the present invention to replace the circuit with the circuit having the equivalent function. In addition, the alternating current fan motor in the embodiment is a single-phase capacitor motor, and the product is a floor fan; in practical application, the speed regulating circuit can also be used for stepless speed regulation of series excited motors, shaded pole motors and the like, and can also be applied to occasions with motors, such as ceiling fans, industrial fans, mobile air conditioners, air purifiers, tower fans, air conditioner internal units, range hoods, fresh air systems, water heaters and the like; and such applications are within the scope of the present invention.
Claims (10)
1. The utility model provides a speed governing circuit of alternating current motor fan, includes filter circuit and speed governing signal input circuit, its characterized in that: the speed regulation device comprises a speed regulation module, wherein the speed regulation module comprises a chip circuit and a driving and power output circuit, the chip circuit is provided with a speed regulation control chip, the driving and power output circuit is an H-bridge motor driving circuit, the H-bridge motor driving circuit is connected with the speed regulation control chip through a control signal, the speed regulation control chip and the H-bridge motor driving circuit are both provided with alternating current input ends, the speed regulation control chip is also provided with a pulse width modulation signal pin, a grounding pin and a power supply voltage pin, the H-bridge motor driving circuit is also provided with an alternating current output end, the alternating current output end is electrically connected with an alternating current fan motor, the grounding pin and the power supply voltage pin are connected through an electrolytic capacitor, the grounding pin and the pulse width modulation signal pin form a control input signal end, and the control input signal end is electrically connected with the speed regulation signal input circuit;
the speed regulating signal input circuit is a mechanical speed regulating signal input circuit or an electronic speed regulating signal input circuit, and the mechanical speed regulating signal input circuit is directly or indirectly electrically connected with the control input signal end.
2. The speed control circuit of an ac motor fan according to claim 1, wherein: the mechanical speed regulation signal input circuit comprises an adjustable resistor, and the adjustable resistor is connected between the grounding pin and the pulse width modulation signal pin;
or, the mechanical speed regulation signal input circuit comprises a coding switch, an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, the optical coupling circuit is connected with the main control chip through a pulse width modulation signal, and the main control chip is electrically connected with the adjustable resistor.
3. The speed control circuit of an ac motor fan according to claim 2, wherein: and a mechanical timing switch is connected outside the power input end of the filter circuit.
4. The speed control circuit of an ac motor fan according to claim 1, wherein: the electronic speed regulation signal input circuit comprises a main control chip, a inching switch and a resistor, wherein the speed regulation inching switch is electrically connected with the main control chip through the resistor, an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, and the optical coupling circuit is connected with the main control chip through a pulse width modulation signal;
or, the electronic speed regulation signal input circuit comprises a main control chip, a coding switch and a resistor, the speed regulation coding switch is electrically connected with the main control chip through the resistor, an optical coupling circuit is arranged between the grounding pin and the pulse width modulation signal pin, and the optical coupling circuit is connected with the main control chip through a pulse width modulation signal.
5. A speed control circuit of an AC motor fan according to claim 2 or 4, characterized in that: the output end of the filter circuit is also connected with a switching power supply circuit, and the switching power supply circuit is in power supply connection with the main control chip.
6. A speed control circuit of an AC motor fan according to claim 2 or 4, characterized in that: the main control chip is also electrically connected with a start-stop switch, a head shaking switch, a timing adjusting switch, a head shaking motor control circuit and a display circuit.
7. The speed control circuit of an ac motor fan as claimed in claim 6, wherein: the master control chip is also electrically connected with a sound reminding circuit and/or a wireless receiving circuit.
8. A speed control circuit of an AC motor fan according to claim 2, 3 or 4, characterized in that: the model of the speed regulation control chip is KP86201 KGA; the model of the main control chip is CMS79F 116.
9. The speed control circuit of an ac motor fan according to claim 2, wherein: the adjustable resistor is a knob type adjustable resistor or a sliding type adjustable resistor.
10. The speed control circuit of an ac motor fan according to claim 1, wherein: the alternating current motor fan comprises an alternating current fan motor, a motor cover, fan blades, a mesh enclosure, a supporting rod and a base, wherein the motor cover and the base are respectively arranged at the upper end and the lower end of the supporting rod, the alternating current fan motor is arranged in the motor cover, the fan blades are arranged in the mesh enclosure and are in transmission connection with the alternating current fan motor, and the mesh enclosure is connected with the motor cover.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121888088.7U CN215580963U (en) | 2021-08-12 | 2021-08-12 | Speed regulating circuit of alternating current motor fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121888088.7U CN215580963U (en) | 2021-08-12 | 2021-08-12 | Speed regulating circuit of alternating current motor fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116780945A (en) * | 2023-06-08 | 2023-09-19 | 青岛云集控制技术有限公司 | Motor controller of fresh air system |
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2021
- 2021-08-12 CN CN202121888088.7U patent/CN215580963U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116780945A (en) * | 2023-06-08 | 2023-09-19 | 青岛云集控制技术有限公司 | Motor controller of fresh air system |
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