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In a D C machine the value of peripheral speed should...

This question belongs to Electrical Engineering Electrical Machine Design
Electrical Machine Design
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In a D.C. machine, the value of peripheral speed should not, normally, exceed

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Correct Answer: Option C
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Ravi Prakash
Ravi Prakash 5 years ago

The peripheral speed lies between 15 to 50 m/s. As the diameter of the armature increases, the peripheral velocity of the armature v = πDN/60 m/s ,

For the normal design of induction motors the calculated diameter of the motor should be such that the peripheral speed must be below 30 m/s. In case of specially designed rotor the peripheral speed can be 60 m/s.
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