rotating electrical machine

Abstract

The present invention provides a rotating electrical machine capable of suppressing an increase in torque ripple caused by splitting a rotor core. The rotating electrical machine of the present invention includes: a stator having an annular iron core back, and a plurality of teeth protruding radially from the iron core back and arranged in the circumferential direction, between the circumferentially adjacent teeth. Slots are formed; and a rotor having an annular rotor core and a plurality of magnetic poles disposed on the rotor core in the circumferential direction, the rotor core is disposed coaxially with the stator across a magnetic gap and can be Rotation, the rotor core has a plurality of split cores divided in the circumferential direction by the split plane, the number of splits of the rotor core is different from the divisor and multiple of the greatest common divisor of the number of poles of the rotor and the number of slots.

Description

technical field

[0001] The present invention relates to a rotating electrical machine applied to, for example, a motor of a hoisting machine of an elevator. Background technique

[0002] In the rotor of a conventional rotating electrical machine, the rotor core is produced by stacking circular punched steel plates, and the inner peripheral part of the punched circular steel plates is wasted, and the material yield decreases.

[0003] In view of such a situation, a conventional rotating electrical machine has been proposed in which a ring-shaped rotor core is produced by arranging split cores in a circumferential direction, and the yield rate of the material of the rotor core is improved. It is produced from a steel plate punched out in an arc shape (for example, refer to Patent Documents 1 and 2).

[0004] prior art literature

[0005] patent documents

[0006] Patent Document 1: Japanese Patent Laid-Open No. 2012-249386

[0007] Patent Document 2: Japanese Patent Laid-O...

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