BRICOLAGE: Fan speed controller

Electric fans are used to move heat from one area to another.

Often depends on the amount of air that can move a fan fan speed of the blade. Fan blade electric motor and finally the rotor speed electric motor directly determines the speed of the fan blade rotates.To of control how quickly turn the rotor drive electric fan, first you, what kind of engine contains fan, determine must since the speed of the engine to an AC motor control procedure differs from the procedure for a DC motor.

Speed AC motor control

A certification authority or motor, AC, works on the principle that electromagnetic fields in the windings of the engines in constant development.

Magnetic field applied rotor apply a force perpendicular magnetic fields generated from pole stator, causing the rotor turn.To speed of the rotor, changing the frequency of electric current in the rotor and stator applied must be changed. To slow an AC motor, reduce the frequency of the alternating current electricity. An AC motor rotate faster, can boost used oscillator frequency.An called circuit to change the frequency. An oscillator is a "LC" switch, because the circuit contains an inductor ("L" stands for electrical inductance) and a capacitor (what the abbreviation "C") wired in parallel circuit.To create a simple oscillator, son of an inductor parallel with variable capacitor circuit. Necessary to calculate the frequency of the signal AC capacitor value change, use the following formula: = 1 / [2π √ (LC)]

Class = "Heading3a" > speed DC motor control

A CD - or act

uelle is continuous - engine, an electromagnetic field created by passing an inductor of electric current. This field is drawn or moved Permpermanent magnets.The speed of a DC motor rotor set depends on the voltage in the engine; the voltage in the motor leads, already the speed of the rotor. A way to adjust the power supply is a voltage divider circuit. Control, switching simple voltage divider can be done using a potentiometer. Connect the positive power supply terminal one end leads potentiometer. Close the terminal potentiometer negative energy supply end result. Close the potentiometer wipers cause motor terminals and the negative energy from terminal motor Terminal Services to connect. Adjust the potentiometer in the need to control the speed of the engine.