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Why Does Curving The Pole Faces In A Dc Machines Contributes To A Smoother Dc Output Voltage From It?

Answer»

For having SMOOTHER output voltage from DC machines its commutation MUST be as ideal as possible.
In order to have good commutation the flux density in the air gap must DECREASE gradually from maximum value under the centre of the pole to zero on.

For having smoother output voltage from DC machines its commutation must be as ideal as possible.
In order to have good commutation the flux density in the air gap must decrease gradually from maximum value under the centre of the pole to zero on.


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