Patent ID: 8723387
Filing Date: 2014-05-13
Classification: G06F,H01B,H01F,H02K,Y02T

Abstract:
1. An electric motor, comprising: a plurality of iron cores arranged on a circle; a plurality of coils wound with an electric wire on the plurality of iron cores, the electric wire including a material having a higher volume resistivity than copper; and a rotor rotated by the plurality of coils to which alternating current is applied, wherein an AC resistance value of the electric wire has a first frequency which is equal to an AC resistance value of a copper wire having the same diameter and length as the electric wire, and a second frequency which is larger than the first frequency and by which the AC resistance value of the electric wire is equal to the AC resistance value of the copper wire, the AC resistance value of the electric wire is smaller than the AC resistance value of the copper wire between the first frequency and the second frequency, and a frequency of the alternating current applied to the coils is controlled so that the frequency in which the coils is used is set within a frequency range between the first frequency and the second frequency.