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  1. 03-28-2011, 10:54 PM #1
    TechTeach
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    New Forum Member

    Would like to say Hi to forum members. Do a lot of internet surfing and ran across this forum thought I would join I am a Senior Technical Training Insturctor by Technical I mean basic electronics, basic industrial electricity, ac motors (three phase & single phase) dc motors, switchgear etc. I keep myself busy training and traveling.
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  2. 03-29-2011, 05:36 AM #2
    dandyme
    dandyme is online now Professional Member*
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    welcome, got any info on 2 phase?
    It`s better to be silent and thought the fool; than speak and remove all doubt.
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  3. 03-29-2011, 06:06 AM #3
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    Tech23
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    Welcome!
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    The statement below is my signature and just my overall feeling towards our industry and does not necessarily pertain to you nor this thread.


    There really isn't a legitimate excuse for not doing the job correctly!
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  4. 03-29-2011, 10:31 PM #4
    TechTeach
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    2 phase

    2 phase is used in selsy systems for positioning control or as a feedback in ac/dc drives for speed or position control. The selsyn has two windings one is R1 & R2 the other winding is labled S1 - S2 - S3. There can be two selsyns in the position control system a transmitter and receiver. The S windings of the transmitter connect to the S windings of the receiver. The R winding of the transmitter and reciver connect across the line and both have to be connected to the same source of ac. As the S winding rotates a phase shift occurs between the S winding and the R winding. Since the S winding of the transmitter is connected to the receiver the voltage in the receiver is at the same phase angle as the transmitter and the receivers S winding rotates to match the position of the transmitter. That is how a selsyn system functions. In a servo system a brushless motor can be used with a permanent magnet rotor and a rotating magnetic field for the stator again it can be used for position control in an ac or dc drive system.
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  5. 03-30-2011, 06:20 AM #5
    dandyme
    dandyme is online now Professional Member*
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    oh, you're better than a lot that hear 2 phase and think smoke is being blown up their a__

    i only have one book that references 2 phase

    you going for pro membership?
    It`s better to be silent and thought the fool; than speak and remove all doubt.
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