Douglas Krantz - Technical Writer - Describing How It Works

Can you connect a Flyback Diode to an Alternator?

I have a question about something

Mr. Krantz

Can you please explain how to connect the Flyback Diode to an Alternator?

Thank you.


A flyback diode isn't a diode that is especially made for use in a flyback situation; it's an ordinary diode that is used to prevent the voltage surge created by electromagnets when the electromagnets are turned off. The electromagnets are power output devices and a diode can only be used in a DC circuit, no AC.

Both generators and alternators are power input devices. A diode cannot be used with a generator or an alternator because either the diode is going to short out the generator or alternator, or the diode isn't going to do anything at all.

Douglas Krantz
Life Safety
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