What is the formula of the zigzag specific permeance?(a) zigzag specific permeance = average width of the rotor tooth * length / (1/2 * mmf per slot^2)(b) zigzag specific permeance = average width of the rotor tooth / length * (1/2 * mmf per slot^2)(c) zigzag specific permeance = average width of the rotor tooth * length * (1/2 * mmf per slot^2)(d) zigzag specific permeance =1/ average width of the rotor tooth * length * (1/2 * mmf per slot^2)I had been asked this question in homework.Question is taken from Pulsation Losses & Types of Leakages in chapter Principles of Magnetic Circuit Design of Design of Electrical Machines

What is the formula of the zigzag specific permeance?(a) zigzag specif

1.	What is the formula of the zigzag specific permeance?(a) zigzag specific permeance = average width of the rotor tooth * length / (1/2 * mmf per slot^2)(b) zigzag specific permeance = average width of the rotor tooth / length * (1/2 * mmf per slot^2)(c) zigzag specific permeance = average width of the rotor tooth * length * (1/2 * mmf per slot^2)(d) zigzag specific permeance =1/ average width of the rotor tooth * length * (1/2 * mmf per slot^2)I had been asked this question in homework.Question is taken from Pulsation Losses & Types of Leakages in chapter Principles of Magnetic Circuit Design of Design of Electrical Machines
Answer» The correct choice is (b) ZIGZAG specific permeance = AVERAGE width of the rotor TOOTH / length * (1/2 * mmf PER slot^2) Best EXPLANATION: The average width of the rotor tooth along with the length and mmf per slot is calculated. On substitution the zigzag specific permeance is obtained.

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