6.2.5. Value relations
A voltage U0 is always generated in the rotor circuit irrespective of the type of direct current machine. The windings in the operating field yield an ohmic resistor, the internal resistor R1. Both values can feature in a duplicate circuit plan.
The internal resistance of the rotor circuit stems from
In accordance with the voltage law the duplicate circuit establishes the relations between generator and motor operating voltages:
The natural direction change in switching over from generator to motor operation must be heeded when drawing up the equations.
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