Two-phase unipolar driving brushless DC motor

Details Two-phase unipolar driving brushless DC motor Two-phase unipolar driving brushless DC motor

1997-03-11

1998-04-14

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310 68B, 310182, 310185, 310186, 310254, H02K 2324, H02K 110

Patent

active

057396140

ABSTRACT:
A two-phase unipolar driving brushless DC motor of a radial gap type having a rotor position detector includes a main-pole yoke having main-poles, an interpole yoke coaxially provided with the main-pole yoke in a superposed manner and having interpoles and an axial short-circuit portion or member provided in an axially extending portion in magnetic fluxes formed in the main-poles and interpoles. This structure allows for easy winding of coils around the main-poles and enhanced winding space factor in order to increase the starting torque and to improve the motor efficiency.

REFERENCES:
patent: 3299335 (1967-01-01), Wessels
patent: 3310696 (1967-03-01), Davin
patent: 4140935 (1979-02-01), Braun et al.
patent: 4535261 (1985-08-01), Tsukamoto et al.
patent: 4616150 (1986-10-01), Concannon
patent: 4775813 (1988-10-01), Janson
patent: 5418816 (1995-05-01), Muller
Patent Abstracts of Japan, vol. 011, No. 161 (E-509), May 23, 1987 & JP 61 293148 A (Tokyo Electric Co., Ltd.), Dec. 23, 1986.
Patent Abstracts of Japan, vol. 012, No. 447 (E-685), Nov. 24, 1988 & JP 63 174537 A (Sankyo Seiki Mfg. Co. Ltd) Jul. 19, 1988.

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