Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-01-16
2000-02-29
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310157, 310257, H02K 3700
Patent
active
060313048
ABSTRACT:
A motor structure including a rotor 1 having a permanent magnet 10 where north poles and south poles are alternately disposed in a moving direction of the rotor, a stator 5a including at least two stator yokes having stator pole teeth 3a, 4a respectively which face to the permanent magnet at a distance and are respectively positioned side by side in the moving direction to bear north poles or south poles respectively due to an electric current flowing through a coil 2a to thereby form at least one phase, wherein the stator pole teeth 3a, 4a are different from each other with respect to an effective area through which magnetic flux passes, whereby high harmonic wave phases generated from the pole teeth 3a, 4a are different from each other by 180 degrees in electric angle to thereby be canceled mutually, therefore an induced electromotive force wave containing hardly high harmonic wave is obtained to thereby reduce a motor vibration.
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Fujitani Sakae
Hino Haruyoshi
Sakiyama Hideki
Suzuki Yuzuru
Dougherty Thomas M.
Minebea Co. Ltd
Waks Joseph
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