Brushless motor with greater efficiency

Details Brushless motor with greater efficiency Brushless motor with greater efficiency

1990-04-13

1992-10-20

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 49R, 310162, 310180, H02K 2112, H02K 3714, H02K 2100, H02K 328

Patent

active

051572982

ABSTRACT:
A brushless motor energized by an M-phase alternating current having a stator with M.multidot.m (m is an even number) teeth, a coil wound around each of the teeth, and a rotor with (M+1).multidot.m permanent magnets. Since the coil is wound around each tooth, cancellation of magnetic fluxes produced by adjacent coils is minimized, which results in a greater efficiency of the motor. Since one coil corresponds to less than one magnet, irregularity on the induced voltage of the coils barely occurs, which results in a smoother output torque of the motor.

REFERENCES:
patent: 378456 (1888-02-01), Moses
patent: 564702 (1886-07-01), Lamme
patent: 4190779 (1980-02-01), Schaeffer
patent: 4566179 (1986-01-01), Sawyer et al.
patent: 4626727 (1986-12-01), Janson
patent: 4687961 (1987-08-01), Horber
patent: 4719378 (1988-01-01), Katsuma et al.
patent: 4806812 (1989-02-01), Masterman

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