- Joined Mar 8, 2021
How can a variable resistor be used for the speed control of a DC shunt motor?
Not if its wound field, all you need to do is vary the relatively low field current.What you generally do NOT want to do is throttle the motor power through a pot. The pot would have to be rated to at least the power of the motor and that makes for an expensive pot. It can be done for small-ish motors (like a toy train set) but becomes impractical at larger scales.
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by Jake Hertz
by Jeff Child