What is the formula for the zigzag permeance?(a) zigzag permeance = average width of the rotor tooth / (1/2 * mmf per slot^2)(b) zigzag permeance = average width of the rotor tooth * (1/2 * mmf per slot^2)(c) zigzag permeance = 1/average width of the rotor tooth *(1/2 * mmf per slot^2)(d) zigzag permeance = average width of the rotor tooth *(1/2 / mmf per slot^2)I have been asked this question in an internship interview.This interesting question is from Pulsation Losses & Types of Leakages in section Principles of Magnetic Circuit Design of Design of Electrical Machines

What is the formula for the zigzag permeance?(a) zigzag permeance = av

1.	What is the formula for the zigzag permeance?(a) zigzag permeance = average width of the rotor tooth / (1/2 * mmf per slot^2)(b) zigzag permeance = average width of the rotor tooth * (1/2 * mmf per slot^2)(c) zigzag permeance = 1/average width of the rotor tooth (1/2 mmf per slot^2)(d) zigzag permeance = average width of the rotor tooth *(1/2 / mmf per slot^2)I have been asked this question in an internship interview.This interesting question is from Pulsation Losses & Types of Leakages in section Principles of Magnetic Circuit Design of Design of Electrical Machines
Answer» RIGHT choice is (a) zigzag permeance = average width of the rotor TOOTH / (1/2 * mmf per SLOT^2) Explanation: The average width of the rotor tooth is first calculated along with the mmf per slot. On substitution, the zigzag permeance is found out.

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