Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-03-21
1998-09-22
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310214, 310241, H02K 2112
Patent
active
058119043
ABSTRACT:
In order to realize a permanent magnet dynamo electric machine which permits a high speed of rotation, the permanent magnet dynamo electric machine includes a stator 20 having a stator iron core 22 in which a stator winding 24 is wound, and a rotor 30 facing the inner circumference of the stator 20 and rotatably supported thereby, the rotor 30 having a rotor iron core 32 and a plurality of permanent magnets 36 arranged inside the rotor iron core 32 so as to face the stator iron core 22, wherein the rotor iron core 32 is provided with the same number of permanent magnet insertion holes 34 as the number of permanent magnets 36 for receiving the same at positions where the ratio R1/R0 is equal to or more than 0.85, wherein R0 is the radius of the rotor 30 and R1 is the radius of an imaginary circle drawn by inscribing the faces of the plurality of permanent magnets 36 at the side remote from the stator 20.
REFERENCES:
patent: 5475277 (1995-12-01), Johnson
patent: 5488260 (1996-01-01), Heyraud
patent: 5548172 (1996-08-01), Kliman et al.
patent: 5581140 (1996-12-01), Futami
patent: 5659217 (1997-08-01), Perterson
Kawamata Shouichi
Koizumi Osamu
Matsunobu Yutaka
Oda Keiji
Shibukawa Suetaro
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Lam Thanh
Stephan Steven L.
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