Electric machine with inner and outer rotor

Details Electric machine with inner and outer rotor Electric machine with inner and outer rotor

2005-10-04

2005-10-04

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S254100, C310S256000

Reexamination Certificate

active

06952069

ABSTRACT:
An electric rotating machine including inner and outer rotors coaxially disposed and driven by a compound current, and a stator disposed between the rotors. Each of the rotors includes a plurality of permanent magnets circumferentially arranged. The stator includes a stator core and a coil to which the compound current is applied. The stator core includes a plurality of circumferentially arranged stator pieces with the coils. The stator pieces have a same shape and are formed by plates laminated in axial alignment with each other. Each stator piece includes inner and outer yokes disposed radially inside and outside, respectively, and a coil area defined between the yokes. The stator pieces adjacent to one another include a first air gap circumferentially formed between the adjacent outer yokes, a second air gap circumferentially formed between the adjacent inner yokes and mutual contact portions circumferentially contacted at the inner yokes.

REFERENCES:
patent: 6226856 (2001-05-01), Kazama et al.
patent: 6847137 (2002-01-01), Furuse
patent: 6472788 (2002-10-01), Nakano
patent: 1 096 648 (2001-05-01), None
patent: 1191673 (2004-03-01), None
patent: 54041401 (1979-02-01), None
patent: 11-356015 (1999-12-01), None
patent: 2001-25185 (2001-01-01), None
patent: 2001-359261 (2001-12-01), None

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