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# SINGLE PHASE INDUCTION MOTOR

- To: femm@yahoogroups.com
- Subject: SINGLE PHASE INDUCTION MOTOR
- From: "kastury_rn" <kastury_rn@yahoo.co.uk>
- Date: Fri, 06 Sep 2002 01:14:11 -0000
- User-agent: eGroups-EW/0.82

    I am trying to model the Single Phase machine but have a few
    problems. I
    saw some response to one of the messages on this and seek your
    help.

    1. David Meeker says that to ensure that all conductors in a coil are
    in series, each conductor should be assigned a circuit. Now, in a
    small
    motor, the number of conductors in a coil could be large, sometimes
    even
    hundreds. How is this done?

    2. Rotor slots are usually closed slots. But the FEMM requires to use
    equivalent open slots. Should this done by assuming that slot width =
    slot
    depth in the bridge portion? The tooth tip saturation will get
    nullified and
    the torques, particularly at starting condition may not be correct.

    3. Rotor conductor and steel material resistivity is to be increased
    in
    proportion of Frequency/slip frequency. Is this correct? (when
    calculating
    at
    a slip frequency)

    4. Rotor endring: How is this considered? Should rotor cage
    conductors also
    be in series and assigned individual circuits?

    If you like I can send you a model of a Ceiling Fan data (2 poles of
    the 18
    poles)that I am trying to analyse. Should The boundaries/edges be
    Periodic
    for the 2 pole simulation?

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