Rotor of rotary electric machine

Abstract

A rotor of a rotary electric machine includes a rotor core and a plurality of magnetic parts. The rotor core has a plurality of slots provided along a circumferential direction. Each of the slots is separated by a center rib. The plurality of magnetic parts are disposed inside the rotor core along the circumferential direction at a predetermined interval. Each of the magnetic parts has a magnetization direction alternating with each other. Each of the magnetic parts includes a pair of permanent magnets placed inside each of the slots. The rotor core comprises a plurality of through-holes and a reinforcement rib. The plurality of through-holes each extend in an axial direction on an inner circumferential side of each of the magnetic parts. The reinforcement rib is disposed in each of the through-holes and in alignment with a circumferential center line of the center rib.

Description

technical field [0001] The present invention relates to a rotor for a rotating electrical machine, and more particularly, to a rotor for a rotating electrical machine that can be mounted on a hybrid vehicle, an electric vehicle, or the like. Background technique [0002] Conventionally, as a rotor used in a rotating electrical machine, there is known a rotating electrical machine in which a rotor core obtained by laminating a plurality of annular steel plates is provided with a plurality of slots, and permanent magnets are respectively inserted into the slots. rotor (for example, refer to Patent Document 1). [0003] Such as Figure 4 As shown, the rotor 105 of the rotating electrical machine described in Patent Document 1 includes: a rotor core 151 made of laminated electromagnetic steel sheets arranged inside the armature 101; through holes 158, 159 provided in both wing parts; 159 retain the central part of the rotor core 151 and cut out the rectangular slots 152, 153 di...

AI Technical Summary

Problems solved by technology

[0006] However, in Figure 4 In the rotor 105 of the rotating electrical machine shown, since the mass of the rotor core 151 is large, a large current is required to output a predetermined rotational torque, and there is a problem that the efficiency of the rotating electrical machine decreases.

[0007] In addition, since the mass of the rotor core 151 is large, the centrifugal force generated on the rotor core 151 increases during rotation, thereby increasing the stress generated on the rotor core 151, and the strength of the rotor core 151 cannot be maintained. question

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