Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Speed And Direction Control of Motor

  1. May 16, 2016 #1

    ENE

    User Avatar

    Hello,
    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
    Hi...
    I reckon your best bet would be a Variable Frequency Inverter drive.
     
  4. May 17, 2016 #3

    ENE

    User Avatar

    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

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

  7. May 18, 2016 #6

    ENE

    User Avatar

    Hello,
    I know the theory procedure we use PWM with sin table in look up i think
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Speed And Direction Control of Motor
  1. Dc motor speed control (Replies: 4)

  2. AC Motor speed control (Replies: 8)

  3. Motor Speed Control (Replies: 0)

Loading...