Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-04-30
1992-06-16
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 310186, 310269, 318138, H02K 2138, H02K 2900
Patent
active
051226979
ABSTRACT:
A hybrid single-phase variable reluctance motor includes a stator with four inwardly salient teeth evenly spaced around a central core. A phase winding is operatively associated with two diametrically opposed stator teeth. Energization of the phase winding causes a temporary magnetization of those two teeth. A rotor disposed for rotation in the central bore has two outwardly salient teeth disposed generally at 180 degrees with respect to each other. A single permanent magnet is disposed adjacent the central bore at the end of one of the stator teeth other than the two having phase windings. A position sensor is disposed at the fourth stator tooth for detecting the rotational position of the rotor in the central bore. The position sensor is disposed in one quadrant of the motor in which the flux resulting from the permanent magnet and the flux resulting from the energization of the phase winding are in the same direction.
REFERENCES:
patent: 4549104 (1985-10-01), Nimura et al.
patent: 4616165 (1986-10-01), Compter
patent: 4728833 (1988-03-01), Shiraki et al.
patent: 4804873 (1989-02-01), Shiraki et al.
patent: 4940912 (1990-07-01), Kant et al.
patent: 5030868 (1991-07-01), Suzuki et al.
Emerson Electric Co.
Rebsch D. L.
Stephan Steven L.
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