Speed/field current relationship of a dc machine

Thread starter cabellos
Start date Apr 21, 2006
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Current Dc Dc machine Machine Relationship

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cabellos

Thread starter
Apr 21, 2006

Im having trouble explaining this relationship...from my graph i know that if armature voltage is held constant then the field current will decrease exponentially for increasing speed. But why?

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Cliff_J

Science Advisor

Apr 23, 2006

The windings have inductance and as you increase the speed the more that inductance plays a role in the impedance.

Speed/field current relationship of a dc machine

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Speed/field current relationship of a dc machine

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