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Is the "shunt field resistance" the resistance of the coils in a shunt generator?

Googling https://www.google.com/search?q=%22shunt+field+resistance%22&oq=%22shunt+field+resistance%22&sourceid=chrome&ie=UTF-8 didn't give any helpful results.

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Yes, a great explanation in the NI link of your search.

The total field resistance is made up of the field coil pair (in series) and one (occasionally 2) limit resistor. In old DC car generators there was typically 1 resistor, which set low current and when shorted out, high current output. Controlled by a voltage sensing relay and an overcurrent relay.

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