Why is magnetic locking or cogging not present in a DC motor?

DWQA Questions › Category: DC Motor & Generator › Why is magnetic locking or cogging not present in a DC motor?
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Ravuuuuu asked 7 years ago
3 Answers
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blue answered 7 years ago

Why does magnetic locking happens? Well it happens in induction motor mainly due to its working principle. The stator coils in the motor is supplied by single/three phase AC supply. As a result of this supply, the stator coils develop their own respective magnetic polarity. Now, as the supply is time-varying, there is time-varying magnetic field also which induces emf in rotor conductors.

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Sumit answered 7 years ago

Brushed DC motors don’t have cogging because of their contruction and principle of operation.
Brushless DC motors have cogging torque.

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Deevu answered 7 years ago

Because there is not salient pole infrastructure for the cylindrical rotor of the DC motor armature mounted on the rotor.