The armature voltage control of D.C. motor provides_____________?
Correct answer: C. constant torque drive
- A. constant voltage drive
- B. constant current drive
- C. constant torque drive
- D. none of the above
Explanation
Armature-voltage control changes speed while keeping the field flux approximately constant, so torque is proportional to armature current and the drive provides constant torque below base speed. Field control, in contrast, is associated with constant-power operation above base speed.
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