What is the assumption made in the calculation of the specific permeance?(a) voltage is kept constant(b) current is kept constant(c) mmf is kept constant(d) speed is kept constantI have been asked this question in an interview for job.The doubt is from Specific Permeance & Calculation of Magnetizing Current topic in section Principles of Magnetic Circuit Design of Design of Electrical Machines

What is the assumption made in the calculation of the specific permean

1.	What is the assumption made in the calculation of the specific permeance?(a) voltage is kept constant(b) current is kept constant(c) mmf is kept constant(d) speed is kept constantI have been asked this question in an interview for job.The doubt is from Specific Permeance & Calculation of Magnetizing Current topic in section Principles of Magnetic Circuit Design of Design of Electrical Machines
Answer» RIGHT option is (c) mmf is kept constant The explanation: The mmf is kept constant over all the flux tubes. The mmf should be kept constant when the INTEGRATION is CARRIED out during the calculation of SPECIFIC permeance.

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