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    SUNIL CSI's Avatar
    SUNIL CSI Posts: 1, Reputation: 1
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    #1

    Aug 17, 2011, 10:32 PM
    Difference between single phase induction motor and three phase induction motor?
    What is the actual operational difference between single phase and three phase motor.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Aug 18, 2011, 03:39 AM
    For a given HP rating a single phase motor will run at a higher amperage and will be a bit less efficient.
    Also, a 3-phase motor's speed can more easily be varied using a VFD.
    3-phase motors require special protection and motor starters where single-phase do not.
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