Patent ID: 9444295
Filing Date: 2016-09-13
CPC Classification: H02K

Claim Text:
1. A rotor of a permanent magnetic motor formed with a plurality of main magnetic poles along a peripheral direction of a rotor core by respectively comprising permanent magnets in permanent magnet inserting holes formed at a plurality of spots in a peripheral direction of the rotor core to penetrate in an axial direction from one end surface up to the other end surface of the rotor core, and formed with magnetic shielding portions for each main magnetic pole which penetrate in the axial direction from the one end surface up to the other end surface of the rotor core and which are positioned between a d axis and a q axis of a d-q axial coordinate on the end surface of the rotor core, wherein each magnetic shielding portion includes a main body portion and an extending portion succeeding to the main body portion, wherein the main body portion is formed at a position opposing a q axis side end surface of the permanent magnet, wherein the main body portion also extends towards an outer peripheral surface of the rotor core, wherein the extending portion is formed closer to an outer peripheral side than an outer peripheral side magnetic pole surface of the permanent magnet, wherein the extending portion is also constituted of a first extending portion which gradually approaches the outer peripheral surface of the rotor core while extending from the q axis side towards the d axis side with the outer peripheral side portion of the main body portion being the starting point and a second extending portion extending further from a tip end portion of the first extending portion from the q axis side towards the d axis side, and wherein an outer peripheral side surface of the second extending portion positioned on the outer peripheral side of the rotor core and an inner peripheral side surface of the second extending portion positioned on the inner peripheral side of the rotor core and opposing the outer peripheral side surface gradually separate from the outer peripheral surface of the rotor core from the q axis side towards the d axis side.