Questions about 110 V motor

Discussion in 'General Electronics Chat' started by Uncle monkey, Jul 27, 2009.

  1. Uncle monkey

    Thread Starter New Member

    Jul 26, 2009
    1
    0
    I'm trying to fix the motor off of a Search Compressor for guy from work. It is missing one capacitor and the other is bad. I have seen in mtr book that there is a formula or ratio of run to start capacitors. I can't find in my book and wonder if someone with a better memory is here.
    Second question is that instead of a typical spring loaded centrifugal switch
    to turn off the start windings there is a spring loaded round disk on the shaft of the rotor. It presses against the contacts in the unenergized position. I dont' understand how this works since i don't see how rotation will cause this to move forward which is what it has to do to open the start circuit.
    Thanks in advance
     
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