Kwanza, nyenzo za insulation za coil hufanya tofauti, motors za chini za voltage, coil hasa hutumia waya enamelled au insulation nyingine rahisi, kama vile karatasi ya composite, motors high voltage kawaida hutumia muundo wa safu nyingi za insulation, kama vile mkanda wa mica ya unga, muundo ni ngumu zaidi, juu ...
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