Patent ID: 8957561
Filing Date: 2015-02-17
Classification: H02K

Abstract:
1. A rotor for a rotary electric machine, comprising: a rotor core in which a plurality of magnetic poles are provided at intervals, in a circumferential direction of the rotor core, at an outer periphery of the rotor core in a radial direction, wherein each of the magnetic poles has a pair of permanent magnets disposed spaced apart from each other in the circumferential direction, and a magnetic flux suppression hole that suppresses flow of magnetic flux and that is formed, between inner-periphery-side end portions of the permanent magnets, in the radial direction, such that the magnetic flux suppression hole extends inwards in the radial direction; the magnetic flux suppression hole has two first holes respectively communicating with magnet insertion holes into which the permanent magnets are inserted, and a second hole that is formed between the first holes with bridge portions interposed between the second hole and the first holes; and an outer-periphery-side end portion of the second hole in the radial direction is positioned further outward in the radial direction than an imaginary straight line that passes through the inner-periphery-side end portions of the pair of permanent magnets, only two bridge portions are provided between the two first holes and the second hole, respectively, each of outer-periphery-side end portions of the first holes and the outer-periphery-side end portion of the second hole is formed in a straight line shape parallel to the direction of the imaginary straight line, and each of the bridge portions are offset from each of the inner-periphery-side end portions of the pair of permanent magnets to a side of a magnetic pole centerline, which is a radial direction line that passes through a center position of the magnetic pole in the circumferential direction.