CN209856084U - Fan speed regulating device - Google Patents
Fan speed regulating device Download PDFInfo
- Publication number
- CN209856084U CN209856084U CN201920573720.5U CN201920573720U CN209856084U CN 209856084 U CN209856084 U CN 209856084U CN 201920573720 U CN201920573720 U CN 201920573720U CN 209856084 U CN209856084 U CN 209856084U
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- CN
- China
- Prior art keywords
- alternating current
- fan
- rectifier bridge
- field effect
- photoelectric coupler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a fan speed regulating device, which comprises an alternating current input end, wherein a live wire of the alternating current input end is respectively connected with an alternating current direct converter and a fan alternating current motor, the other end of the alternating current direct converter is connected with a collecting electrode output end of a photoelectric coupler through a resistor R1, the other end of the fan alternating current motor is connected with a live wire power end of a rectifier bridge, a zero line power end of the rectifier bridge is connected with a zero line of the alternating current input end, a direct current negative end of the rectifier bridge is grounded, a direct current positive end of the rectifier bridge is connected with a drain end of a field effect tube, a source end of the field effect tube is grounded, a grid end of the field effect tube is connected with a collecting electrode output end of the photoelectric coupler, an emitting electrode output end of the photoelectric coupler is grounded, a negative electrode power input end of the photoelectric coupler is, the stepless/segmented speed regulation control can be realized for the fan motor, and the speed regulation range of the fan is greatly improved.
Description
[ technical field ]
The utility model relates to a fan speed adjusting device.
[ background art ]
The existing speed regulating circuit applied to the alternating current fan generally realizes the speed regulation of the fan by a capacitance voltage reduction mode, as shown in fig. 1, the speed regulation conversion of high, medium and low gears of the fan is realized by regulating silicon controlled rectifiers Q1, Q2 and Q3, but the fan can only regulate the speed of three gears, the speed regulation range is small, and meanwhile, alternating current input by the fan is not subjected to rectification and filtering, so that noise is generated in the running process of the fan and even an overheating phenomenon occurs to damage the fan motor, and the existing speed regulating circuit cannot play an overload protection role in the fan motor.
[ contents of utility model ]
The utility model overcomes above-mentioned technique is not enough, provides a fan speed adjusting device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a fan speed regulating device comprises an alternating current input end 1, wherein the live wire of the alternating current input end 1 is respectively connected with an alternating current direct converter 2 and a fan alternating current motor 3, the other end of the alternating current direct converter 2 is connected with the output end of the collector of the photoelectric coupler 4 through a resistor R1, the other end of the fan alternating current motor 3 is connected with a live wire power end of a rectifier bridge 5, a zero line power end of the rectifier bridge 5 is connected with a zero line of an alternating current input end 1, the direct current negative electrode end of the rectifier bridge 5 is grounded, the direct current positive electrode end of the rectifier bridge 5 is connected with the drain end of the field effect tube 6, the source end of the field effect tube 6 is grounded, the grid end of the field effect tube 6 is connected with the output end of the collector of the photoelectric coupler 4, the output end of the emitter of the photoelectric coupler 4 is grounded, the input end of the negative power supply of the photoelectric coupler 4 is grounded, the positive power input of the photoelectric coupler 4 is connected with the PWM output regulator 7 through a resistor R2.
In the fan speed regulating device, the fan ac motor 3 is connected in parallel with the capacitor C.
In the fan speed regulating device, the resistor R3 is connected between the source end of the fet 6 and ground.
The utility model has the advantages that:
the utility model outputs PWM pulse signal to regulate the speed of the fan through the PWM output regulator, and can realize stepless/segmental speed regulation control of the fan motor, thereby greatly improving the speed regulation range of the fan; the utility model discloses fan AC motor connects electric capacity C in parallel, and the wave form of the AC at both ends of the fan AC motor is shaped and filtered into sine wave, thus preventing the fan AC motor from generating noise and overheating during operation; the utility model discloses a resistance R3 carries out overload protection effect to fan AC motor.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a prior art fan speed regulation circuit;
fig. 2 is a schematic diagram of the speed-adjusting circuit of the present invention.
[ detailed description of the invention ]
The following description is further detailed with reference to the accompanying drawings and embodiments of the present invention:
as shown in fig. 2, a fan speed adjusting device comprises an ac input terminal 1, wherein a live wire of the ac input terminal 1 is connected to an ac direct converter 2 and a fan ac motor 3 respectively, the other end of the alternating current direct converter 2 is connected with the output end of the collector of the photoelectric coupler 4 through a resistor R1, the other end of the fan alternating current motor 3 is connected with a live wire power end of a rectifier bridge 5, a zero line power end of the rectifier bridge 5 is connected with a zero line of an alternating current input end 1, the direct current negative electrode end of the rectifier bridge 5 is grounded, the direct current positive electrode end of the rectifier bridge 5 is connected with the drain end of the field effect tube 6, the source end of the field effect tube 6 is grounded, the grid end of the field effect tube 6 is connected with the output end of the collector of the photoelectric coupler 4, the output end of the emitter of the photoelectric coupler 4 is grounded, the input end of the negative power supply of the photoelectric coupler 4 is grounded, the positive power input of the photoelectric coupler 4 is connected with the PWM output regulator 7 through a resistor R2. The PWM output regulator 7 regulates the output PWM pulse, thereby realizing the stepless/segmental speed regulation control of the fan alternating current motor 3, greatly enlarging the speed regulation range of the fan and enhancing the user experience.
The fan alternating current motor 3 is connected with a capacitor C in parallel, and the alternating current waveforms at two ends of the fan alternating current motor are shaped and filtered into sine waves, so that noise and overheating during operation of the fan alternating current motor are prevented.
And a resistor R3 is connected between the source end of the field effect transistor 6 and the ground, and the overload protection effect is performed on the fan alternating current motor.
Claims (3)
1. A fan speed adjusting device is characterized in that: the direct current fan power supply comprises an alternating current input end (1), wherein a live wire of the alternating current input end (1) is respectively connected with an alternating current direct converter (2) and a fan alternating current motor (3), the other end of the alternating current direct converter (2) is connected with a collector output end of a photoelectric coupler (4) through a resistor R1, the other end of the fan alternating current motor (3) is connected with a live wire power end of a rectifier bridge (5), a zero line power end of the rectifier bridge (5) is connected with a zero line of the alternating current input end (1), a direct current negative electrode end of the rectifier bridge (5) is grounded, a direct current positive electrode end of the rectifier bridge (5) is connected with a drain end of a field effect tube (6), a source end of the field effect tube (6) is grounded, a grid end of the field effect tube (6) is connected with a collector output end of the photoelectric coupler (4), an emitter output, and the positive power supply input of the photoelectric coupler (4) is connected with the PWM output regulator (7) through a resistor R2.
2. A fan governor device according to claim 1, characterized in that: and the fan alternating current motor (3) is connected with a capacitor C in parallel.
3. A fan governor device according to claim 1, characterized in that: and a resistor R3 is connected between the source end of the field effect transistor (6) and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920573720.5U CN209856084U (en) | 2019-04-24 | 2019-04-24 | Fan speed regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920573720.5U CN209856084U (en) | 2019-04-24 | 2019-04-24 | Fan speed regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209856084U true CN209856084U (en) | 2019-12-27 |
Family
ID=68938946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920573720.5U Active CN209856084U (en) | 2019-04-24 | 2019-04-24 | Fan speed regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209856084U (en) |
-
2019
- 2019-04-24 CN CN201920573720.5U patent/CN209856084U/en active Active
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