Stepless speed regulating electric fan
A stepless speed regulation, electric fan technology, used in electrical components, AC motor control, non-variable-capacity pumps, etc.
Inactive Publication Date: 2009-09-30
FOSHAN ZHONGGEWEI ELECTRONICS
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- Application Information
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Problems solved by technology
[0002] At present, the household electric fan generally adopts the setting of the third gear, and the wind speed is changed by changing the running winding of the motor. The wind speed has been fixed at the factory. Increased requirements for household fans, in order to make the fans more comfortable, require more air volume requirements to choose from
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[0009] The present invention will be further explained below in conjunction with the accompanying drawings, see attached figure 1 As shown, the preferred embodiment of the present invention includes a power supply circuit 1, a control circuit 2, a drive circuit 3, a load motor 4, and a zero-crossing detection circuit 5. One end of the zero-crossing detection circuit 5 is interrupted by the control circuit 2. The other end is connected to the live wire of the power circuit 1, the input end of the load motor 4 is connected to the live wire of the power circuit 1, the output end is connected to the drive circuit 3, and the drive circuit 3 is connected to the drive control circuit 2. The zero-crossing detection circuit 5 includes a resistor R 7 , R 8 , R 9 , Diode D 3 , D 4 , Optocoupler IC 2 , Capacitance C 3 , Where the resistance R 7 One end is connected to the live wire of the power circuit, and the other end is connected to the diode D 3 The anode, diode D 3 The cathode and diode...
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The invention relates to a stepless speed regulating electric fan, which includes a power supply circuit, a driving circuit, a control circuit, and a zero-cross testing circuit, wherein, one end of the zero-cross testing circuit is connected to the fracture port of the control circuit, the other end of the zero-cross testing circuit is connected to the front line of the power supply circuit, the input end of the load motor is connected to the front line of the power supply circuit, the output end of the load motor is connected to the driving circuit, and the driving circuit is connected to the drive control circuit. Based on the circuit of the former electric fan, the present invention increases a zero-cross testing circuit, and adopts the voltage chopping manner to regulate alternating the current voltage size of the fan, thereby reaching the stepless speed regulating of the electric fan, which allows the user to have more selection when using the electric fan, and to be more humanized.
Description
Technical field: [0001] The invention relates to the technical field of household fans, in particular to a stepless speed regulation electric fan. Background technique: [0002] At present, household electric fans generally adopt the setting of three-gear wind, and change the wind speed by changing the running winding of the motor. The wind speed has been fixed at the factory. Users have only three choices and cannot fine-tune in a certain gear, but as people The increase in requirements for household fans, in order to make the fan more comfortable, requires more air volume requirements to choose from. Summary of the invention: [0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a stepless speed regulation electric fan that is more user-friendly and more comfortable to use. [0004] In order to achieve the above-mentioned object, the technical solution provided by the present invention includes a power supply circuit, a driv...
Claims
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IPC IPC(8): H02P27/02H02M5/257F04D25/08
Inventor 黄涛罗高诚余梦林
Owner FOSHAN ZHONGGEWEI ELECTRONICS