Hybrid stepping motor, driving method for the same and coil wind

Details Hybrid stepping motor, driving method for the same and coil wind Hybrid stepping motor, driving method for the same and coil wind

1993-07-27

1995-08-22

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

318696, H02K 3700

Patent

active

054443164

ABSTRACT:
A ten-phase and twenty-main pole hybrid stepping motor is driven by a five-phase driving pulse. The rotor has N and S pole tooth gears at ends of a rotor shaft. The stator has a cylindrical hollow body. Nos. 1-20 main poles extend from an inner wall of the hollow body toward the rotor shaft in a plane perpendicular to the rotor shaft so that the twenty main poles surround the N and S pole teeth in the plane perpendicular to the rotor shaft. Each main pole has a free end at which two stator teeth are formed. The stator teeth face the teeth of N and S pole teeth gears. A coil is wound around each main pole for excitation of the main pole. Nos. 1-10 main poles and Nos. 11-20 main poles face each other in the radial direction of the rotor respectively. An arbitrary main pole and a fifth next main pole always have a 90-degree relation. Positions of the teeth on Nos. 1-10 and Nos. 11-20 main poles are respectively determined by an expression with non-overlapping m being substituted:

REFERENCES:
patent: 3866104 (1975-02-01), Heine
patent: 4607204 (1986-08-01), Setoya
patent: 4745312 (1988-05-01), Nagasaka
patent: 5272401 (1993-12-01), Lin

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