Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-09-04
2000-03-07
Enad, Elvin
Electrical generator or motor structure
Dynamoelectric
Rotary
H02K 127
Patent
active
06034458&
ABSTRACT:
A DC brushless motor 3 is provided which comprises armature 31 and rotor 32. Rotor 32 is provided with a rotor yoke that has four main poles 321 on its periphery. Slots with a radial-direction size of L.sub.m are formed on main poles 321 of the rotor yoke. Magnetic-field permanent magnet 323 with an approximate thickness of L.sub.m is embedded in each slot 322, such that the radial-direction size L.sub.m of slot 322 and the air gap length L.sub.g of the air gap formed between rotor 32 and armature 31 satisfy the relationship 0<L.sub.m +L.sub.g .ltoreq.2 mm.
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Uetake Akihito
Yamagishi Yoshihiko
Enad Elvin
Seiko Epson Corporation
Tamai K.
Watson Mark P.
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