Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2004-04-02
2008-10-14
Hanh, Nguyen N (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S036000
Reexamination Certificate
active
07436094
ABSTRACT:
A rotary actuator has a stator having plural permanent magnets1aand1b; a rotor having a rotor core3which plural salient poles3aand3bare formed at, and one or more rotor coils5are wound around; an electromagnetic torque generating portion A comprising the stator and the rotor which, by supplying an electric current to the rotor coils5, generates an electromagnetic torque which displaces a relative angle position of the rotor and the stator in approximate proportion to the magnitude of the electric current; and a coil spring36biased in approximate proportion to the magnitude of the relative angle displacement of the rotor and the stator, and thereby generating a torque in the direction opposite to the direction of the electromagnetic torque. When the exciting current is supplied to the rotor coils5, the electromagnetic torque in approximate proportion to the magnitude of the electric current is generated between the rotor and the stator, which makes the coil springs 36 bias and the rotor or the stator rotate to and be held at the angular position where the generated electromagnetic torque corresponds to the opposite torque generated by the coil spring36.
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Translation of International Preliminary Examination Report mailed Mar. 2, 2006.
Supplementary Search Report issued Jun. 12, 2008 in European application No. 04725491.7.
Brinks Hofer Gilson & Lione
Hanh Nguyen N
Minebea Co. Ltd.
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