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Isolation characteristic speed control circuit and speed control method of external rotor electronically controlled fan

An isolation characteristic speed regulation and electronic control technology, which is applied in pump control, mechanical equipment, non-variable pumps, etc., can solve the problems that the isolation speed regulation cannot be realized, and the fan power system is easy to burn out, so as to avoid easy burning Effect

Active Publication Date: 2015-10-21
HANGZHOU DUNLI ELECTRIC APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages: It is impossible to realize isolated speed regulation, and the fan power system is easy to burn out
Its disadvantages: It is impossible to realize isolated speed regulation, and the fan power system is easy to burn out

Method used

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  • Isolation characteristic speed control circuit and speed control method of external rotor electronically controlled fan

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: with reference to attached figure 1 . An isolation characteristic speed regulation circuit of an external rotor electronically controlled fan, including an AC / DC power conversion circuit, an isolation characteristic speed regulation circuit, an overvoltage protection circuit and an intelligent power control module, and an AC / DC conversion chip 0 in the AC / DC power conversion circuit The input terminal is connected to the direct current after AC-DC conversion and capacitor filtering, the output terminal of the AC / DC conversion chip is connected to the input terminal of the isolated power supply in the speed regulation circuit with isolation characteristics, and the power output of the isolated power supply in the speed regulation circuit with isolation characteristics The terminal outputs +10V power supply, the ground terminal GND2 of the isolated power supply is connected to the ground terminal of the operational amplifier chip Ⅰ, the ground terminal of th...

Embodiment 2

[0011] Embodiment 2: On the basis of Embodiment 1, a speed regulation method of an isolation characteristic speed regulation circuit of an external rotor electronically controlled fan, using the AC / DC conversion chip 0 to generate a power supply with isolation characteristics to the operational amplifier chip I and The comparator chip II provides the working power, and the triangular wave signal generated by the operational amplifier chip I enters the comparator chip II for signal processing to generate a PWM signal. Speed ​​regulation function, the fan speed signal FG is fed back to the fan user power system in real time through the optocoupler II.

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Abstract

The invention relates to an isolation characteristic speed regulation circuit of an electronic control type fan of an outer rotor and a speed regulation method. The isolation characteristic speed regulation circuit is characterized in that a power output end of an isolation power source of the isolation characteristic speed regulation circuit outputs a +10V power source, a grounding end GND 2 of the isolation power source is connected with a grounding end of an operational amplifier chip I, a grounding end of a comparator chip II, a signal output end of an opto-coupler II, a negative pole of a capacitor C1 and a negative pole of a diode D1; a positive pole of a capacitor C1 is connected with a signal input end of the operational amplifier chip I, a positive pole of the diode D1 is connected with a rotate speed output end, and a signal input end of the opto-coupler II is connected with an FG signal end; a signal end of the isolation power source is connected with a signal input end of an intelligent power module, and a signal output end of the operational amplifier chip I is connected with a signal input end of the comparator chip II; and a signal output end of the comparator chip II is connected with a signal input end of the opto-coupler II, and a signal output end of the opto-coupler I is connected with a signal input end of a logic driving chip of a direct current brushless fan.

Description

technical field [0001] The invention relates to an isolation characteristic speed regulation circuit and a speed regulation method of an outer rotor electronically controlled fan that can fundamentally solve the burning of the outer rotor fan power supply system, and belongs to the field of outer rotor fan speed regulation circuit manufacturing. Background technique [0002] CN102364114A, the name "a remote control speed-adjustable external rotor axial flow fan", including fan blades, mesh cover, junction box, motor, is characterized in that: the junction box includes a signal receiving module, a transformer rectifier circuit, a decoding circuit, Motor control circuit, control signal transmitting circuit, control signal receiving circuit, motor control circuit, the transformer and rectifier circuit converts the alternating current into a smaller voltage direct current for each circuit; the control signal transmitting circuit sends the coded signal to the control Signal recei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
Inventor 屈刚孙勇
Owner HANGZHOU DUNLI ELECTRIC APPLIANCES
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