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Speed And Direction Control of Motor

  1. May 16, 2016 #1


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    In case of DC we use H-Bridges To control Dc motor direction and Speed with PWM.
    But in case of AC motor Single phase and 3 phase motor how to control Speed and direction?
  2. jcsd
  3. May 16, 2016 #2
    I reckon your best bet would be a Variable Frequency Inverter drive.
  4. May 17, 2016 #3


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    How it will work i mean in H bridges there is mosfet with PWM channel.
    in the we will change the frequency of 3 phase how?
  5. May 17, 2016 #4
    You can shift the direction of an 3 phase motor by swaping two of its three phases. The speed depends on how hast the stator magnetic field rotates. So you can change the AC frequency if possible or change the supply voltage, but i recomend someone who works with electrical machines to reply to you.
  6. May 18, 2016 #5


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  7. May 18, 2016 #6


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    I know the theory procedure we use PWM with sin table in look up i think
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