Patent ID: 8344581
Filing Date: 2013-01-01
Classification: H02K

Abstract:
1. An induction motor rotor comprising: a rotor core with slots formed therein, and a squirrel-cage secondary conductor including a nonmagnetic and conductive material filled in each of the slots of the rotor core, wherein each of the slots is formed to include a top slot, a middle slot, and a bottom slot, each of which communicates with an adjacent layer slot; wherein a relation among a width in the circumferential direction of the top slot, a width in the circumferential direction of the middle slot, and a width in the circumferential direction of the bottom slot is defined as: width in the circumferential direction of the top slot>width in the circumferential direction of the middle slot>width in the circumferential direction of the bottom slot, and wherein a relation among a width in the circumferential direction of the rotor tooth between adjacent top slots, a width in the circumferential direction of the rotor tooth between adjacent middle slots, and a width in the circumferential direction of the rotor tooth between adjacent bottom slots is defined as: maximum width in the circumferential direction of the rotor tooth between adjacent top slots<minimum width in the circumferential direction of the rotor tooth between adjacent middle slots and maximum width in the circumferential direction of the rotor tooth between adjacent middle slots<minimum width in the circumferential direction of the rotor tooth between adjacent bottom slots.