Question

"single phase motors are not self-starting " .explain this statement

Answer 1

Answer:

Yes this statement is true that single phase motors are not self-starting

Explanation:

single phase motors are not self-starting because There can be fault any time because of under voltages , undercurrent or overcurrent , over loading and over heating and it was running it experience the faults when it starts on and off .

There are so many causes -

1) Bent shaft to the rotor.

2) Belt may be too tight.

3) Motor may be overloaded

4) Starter winding may be short-circuited or earthed.

5) Misalignment of the drive.

6) Connections of stator windings may be wrong.

7) Supply voltage may be too high.

8) Short-circuit of stator winding or centrifugal switch may be short-circuited.

9) Motor loosely fitted on the foundation.

10) Supply may be cut off.

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