External rotor electronically controlled fan and its speed regulation method

Abstract

The invention relates to an outer rotor electronic control fan and a speed regulating method. A +10V power supply is output by the power supply output end of an isolating power supply in an isolating characteristic speed regulating circuit; the ground terminal GND2 of the isolating power supply is connected with the ground terminal of an operational amplifier chip I, the ground terminal of a comparator chip II, the signal output end of an optical coupler II, the cathode of a capacitor C1 and the cathode of a diode D1; the anode of the capacitor C1 is connected with the signal input end of the operational amplifier chip I; the anode of the diode D1 is connected with a rotating speed output end; the signal input terminal of the optical coupler II is connected with an FG signal end; the signal end of the isolating power supply is connected with the signal input end of an intelligent power module; the signal output end of the operational amplifier chip I is connected with the signal input end of the comparator chip II; the signal output end of the comparator chip II is connected with the signal input end of an optical coupler I; and the signal output end of the optical coupler I is connected with the signal input end of a logical driving chip of a direct-current brushless fan. The outer rotor electronic control fan and the method have the advantages that the isolating characteristic speed regulation of the outer rotor electronic control fan is realized, and the defect of easiness in burning of a power supply system existing in the prior art is overcome.

Description

technical field [0001] The invention relates to an outer rotor electronically controlled fan and a speed regulating method capable of fundamentally solving the burning of the power system of the outer rotor fan, and belongs to the field of manufacturing speed regulating circuits of the outer rotor fan. 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 receiving circuit, the control signal receiving c...

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

Its disadvantages: The stepless speed regulation driver is a single-stage heat dissipation structure, with small heat dissipation and poor heat dissipation effect, and is not suitable for heat dissipation of intelligent power modules in the electronic control circuit of outer rotor fans.

Its disadvantages: the heat dissipation structure of the three-phase half-controlled rectifier bridge has small heat dissipation and poor heat dissipation effect, and is not suitable for heat dissipation of the rectifier bridge in the electronic control circuit of the outer rotor fan

Its shortcoming: this structure is not suitable for the installation of the Hall sensor in the speed regulation circuit used by the outer rotor fan

Its shortcomings: neither can the speed control circuit board be installed in the casing, nor can it realize the simple and reliable connection between the stator coil and the speed control circuit board in the stator winding

Its disadvantages: First, the volume is large, which affects the use effect; second, the dustproof effect is not good

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