Rotor for a rotating electric machine

Details Rotor for a rotating electric machine Rotor for a rotating electric machine

1997-09-12

1998-08-11

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310258, H02K 122

Patent

active

057931445

ABSTRACT:
The present invention prevents the degradation of the power generating efficiency of an alternating current generator by preventing the expansion of an air gap formed between pole cores and a stator core, achieves low-noise operation by preventing generation of high-frequency impact magnetic noise, and makes it possible to relieve strains applied on a magnet holder. The present invention utilizes sixteen magnets, each of which fits between two of sixteen claw-like magnetic poles formed on the outer periphery of Lundell-type pole cores, which rotates integrally with a shaft. The magnets are caught and stopped by a magnet holder which has been formed by interconnecting zig-zagging segments and has elasticity as a whole. Here, the permanent magnets are held by the magnet holder so that the magnet holder does not protrude towards the rotor side from the outer peripheral face of the Lundell-type pole cores and the contacting faces of the magnet holder contact the outer faces of the permanent magnets. The claw-like magnetic poles are disposed so as to face the stator.

REFERENCES:
patent: Re31950 (1985-07-01), Binns
patent: 4959577 (1990-09-01), Radomski
patent: 5038066 (1991-08-01), Pawlak et al.
patent: 5132581 (1992-07-01), Kusase
patent: 5177391 (1993-01-01), Kusase
patent: 5306977 (1994-04-01), Hayashi

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