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AC shaded pole single phase induction pole motor

Discussion in 'Electronic Repair' started by Asimov, Apr 25, 2005.

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  1. Asimov

    Asimov Guest

    "" bravely wrote to "All" (24 Apr 05 21:20:34)
    --- on the heady topic of "AC shaded pole single phase induction pole motor"

    an> From:
    an> Xref: aeinews sci.electronics.repair:46513

    an> Sir/Madam

    an> i have a dayton a.c. shaded pole single phase motor with 1/150HP,
    an> 3000
    an> RPM, 230 V, 60 Hz frequency and Full Load Amps
    an> 0.24 . I want to control the torque of this motor through program.For
    an> that i have feedback from motor is current to the motor . I want to
    an> control the torque use this current as feedback.for that I need a
    an> equation connecting torque and the current.

    RPM of this motor type is dependant on frequency. Altering the voltage
    will only give approximately 10% practical change in torque.

    A*s*i*m*o*v

    .... Engineers do it to maximum stress loads.
     
  2. While most induction motors are run at nearly constant speed, for shaded
    pole motors with a light load like a fan, the torque and thus speed can vary
    from near zero to almost synchronous speed based on input voltage. I use a
    Variac to control my window fan. It works very well.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
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  3. James Sweet

    James Sweet Guest


    As will a simple light dimmer in most cases, though some don't like driving
    inductive loads. Speed controllers for shaded pole motors are widely
    available and they're nothing more than a triac dimmer circuit.
     
  4. N Cook

    N Cook Guest

    I tried this once with as a mod to drying fans in a photographic print
    processor
    and there was a cyclic revving / slowing effect rather than constant
    RPM.
     
  5. Though they will probably have some slighlty modified phase characteristics
    when called a motor controller. For a very small shaded pole motor load,
    a normal light dimmer may behave strangely.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name is included in the subject line. Or, you can
    contact me via the Feedback Form in the FAQs.
     
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