What is the relation between number of poles and flux reversal in the armature?(a) number of poles is directly proportional to the flux reversal in the armature(b) number of poles is indirectly proportional to the flux reversal in the armature(c) number of poles is directly proportional to the square of the flux reversal in the armature(d) number of poles is indirectly proportional to the square of the flux reversal in the armatureI have been asked this question in an interview for job.Enquiry is from Design Steps and Considerations in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines

What is the relation between number of poles and flux reversal in the

1.	What is the relation between number of poles and flux reversal in the armature?(a) number of poles is directly proportional to the flux reversal in the armature(b) number of poles is indirectly proportional to the flux reversal in the armature(c) number of poles is directly proportional to the square of the flux reversal in the armature(d) number of poles is indirectly proportional to the square of the flux reversal in the armatureI have been asked this question in an interview for job.Enquiry is from Design Steps and Considerations in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines
Answer» The correct answer is (a) NUMBER of poles is DIRECTLY proportional to the flux reversal in the armature Explanation: The first design CONSIDERATION in the PMDC motor is the number of poles. The flux reversal in the armature is directly proportional to the number of poles.

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