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Question:

How do you energize windings of an AC motor? (or generator)?

I just asked a question about generating electricity from an AC motor and someone told me to quot;energize the windingsquot;. Can someone tell me what that is?

Answer:

you might be able to put some AC voltage at the correct phase into the capacitor start winding of the motor. If it is not a capacitor start motor, it might not have a winding that can be energized to operate as a generator. It will be tricky to produce the AC voltage at the correct phase and may not be practical since it might need to be in-phase with the speed of the motor. My guess is you will not be able to energize the capacitor start windings of an AC motor with DC and get anything useful. It might make a nice experiment for a science fair project, however if you do do an experiment driving with such a motor, be careful, the voltages can be lethal. a much better way to get electrical power from commonly available parts is to spin an automobile alternator that you got from a junkyard
The 'windings' are the coils of insulated copper wire. They are only 'energized' during operation of the device (either as a motor, or as a generator). If the device is operating as a motor, a voltage difference across the wire pushes current through it. The flowing electric charge creates a magnetic field, which pushes on the permanent magnets, spinning the shaft. If the device is operating as a generator, the permanent magnets on the spinning shaft create a changing magnetic field which induces a voltage in the coils of wire. This voltage can then be utilized to run other devices.

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