hi ive recently been reading a book called motors and drives and have attempted the review questions as i think its relevant for my course, but im struggling to work out the formula to calculate MMF across an air gap in a motor. do you add together the reluctance of the air gap and iron together and minus it from the total MMF?
Also the reluctance of air is μo= 4xpie to the power of ten -7 but all it says for the reluctance of iron is μfe ,fe meaning ferromagnetic. is reluctance of iron non existent as ive bin given no answer to what i should type in a calculater for μfe.
formula for MMF across an air gap and what i should type in to my calculater for μfe would be great
Also the reluctance of air is μo= 4xpie to the power of ten -7 but all it says for the reluctance of iron is μfe ,fe meaning ferromagnetic. is reluctance of iron non existent as ive bin given no answer to what i should type in a calculater for μfe.
formula for MMF across an air gap and what i should type in to my calculater for μfe would be great