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About NEMA control signal lead (letter "C") for DC motor

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place1234

place1234

Electrical
Jul 26, 2005
55
I'm quite new to DC motor application and wanna learn a lot.
Anybody could tell me how does the control signal lead (NEMA letter "C", between Intercoil and armature) work? To what it connect? Why call it control signal?
 
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