3 phase ac motor speed control circuit

Posted on Feb 6, 2014

Controlling the speed of three phase ac motor is done by controlling the frequency of the power line supply, since the motor is synchronized with the line frequency. Three phase ac motor speed controller is actually nothing more than three phase sine wave power inverter with variable frequency. The three phase power inverter is a complex circuit,

3 phase ac motor speed control circuit
Click here to download the full size of the above Circuit.

but fortunately there is an integrated circuit chip for this purpose. This is the figure of the circuit; For the final motor driver circuit, you can see the component values are shown only for OB2 channel, but the others are similar. This 3 phase ac motor controller use optical isolation, so you must be careful in designing the layout, to make a clear separation between low and high voltage network. This separation is useful for minimizing the risk of hazardouz electrical shock.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Infrared beam barrier proximity sensor
    microcontroller Arduino 230v Light bulb dimming
    Descrete Multistage Light Sequencer
    Two channel audio mixer circuit design electronic project
    laser security system
    USB I2C Interface
    With a CD4011 dual-produced sound and light control delay lamp circuit
    Stock dial telephone line power supply circuit diagram
    F733 integrated amplifiers common emitter - common base wideband amplifier circuit