Patent ID: 8970082
Filing Date: 2015-03-03
Classification: H02K,Y10T

Abstract:
1. A permanent magnet rotor comprising: at least one permanent magnet; and a rotor core including a first end and a second end, said rotor core comprising a first circumferential sidewall, a second circumferential sidewall, a radially inner wall, and a radially outer wall that define a permanent magnet opening configured to receive said at least one permanent magnet, wherein said second circumferential sidewall is oriented substantially perpendicular to one or more of said radially inner wall and said radially outer wall, said rotor core further comprising at least one permanent magnet retention feature extending at an acute angle from one of said radially inner wall and said radially outer wall proximate said first circumferential sidewall and toward said second circumferential sidewall, said at least one retention feature configured to maintain a position of said at least one permanent magnet with respect to the at least one permanent magnet opening by biasing said at least one permanent magnet against said second circumferential sidewall such that circumferential movement of said permanent magnet is restricted.