Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1981-04-17
1983-05-24
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
318696, H02K 3707
Patent
active
043852475
ABSTRACT:
A four-phase hybrid type stepping motor is disclosed, which comprises a rotor and eight stator poles each formed on a plane facing to an outer side surface of the rotor with a plurality of stator teeth, wherein a pitch between a center of the stator teeth of the first one of the eight stator poles and a center of the stator teeth of the fourth stator pole, a pitch between the center of the stator teeth of the fourth stator pole and a center of the stator teeth of the seventh stator pole and a pitch between the center of the stator teeth of the seventh stator pole and a center of the stator teeth of the second stator pole are common and equal to .tau..sub.c defined as follows: ##EQU1## where Z.sub.R is the number of the rotor teeth and N is an integer close to 3.multidot.Z.sub.R /8.
REFERENCES:
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patent: 3866104 (1975-02-01), Heine
patent: 3875437 (1975-04-01), Hara et al.
patent: 3978356 (1976-08-01), Spiesberger
patent: 4029977 (1977-06-01), Chai et al.
patent: 4095161 (1978-06-01), Heine et al.
patent: 4155018 (1979-05-01), Oudet
patent: 4234808 (1980-11-01), Geppert et al.
Duggan Donovan F.
Oriental Motor Co., Ltd.
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