question: What three elements determine the size of the air-gap area and back iron depth ?
answer: power rating of the armature winding set , the speed of the machine , and the achievable air-gap flux density before core saturation
turker_answer: The power rating of the armature winding set , the speed of the machine , and the achievable air-gap flux density before core saturation are the three elements that determine the size of the air-gap area and back iron depth .
rule-based: Power rating of the armature winding set , the speed of the machine , and the achievable air-gap flux density before core saturation determine the size of the air-gap area and back iron depth .