Brushless DC motor system with optically scannable member for co

Details Brushless DC motor system with optically scannable member for co Brushless DC motor system with optically scannable member for co

1987-02-11

1989-02-07

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

H02K 2910

Patent

active

048034088

ABSTRACT:
A brushless DC motor system includes a multi-pole DC motor having coils and permanent magnets. Optically scannable markers are applied on the circumference of a rotating member of the motor in fixed association with the magnets. By means of a scanner, these markers are converted to signals. These signals are evaluated with respect to their phase position and moment of commutation, and as a result commutation current is supplied to the coils.

REFERENCES:
patent: 3569804 (1971-03-01), Studer
patent: 3577053 (1971-05-01), McGee
patent: 3581173 (1971-05-01), Hood
patent: 4197489 (1980-04-01), Dunn et al.
patent: 4228384 (1980-10-01), Arnold, Jr. et al.
patent: 4273334 (1981-06-01), Schone et al.
patent: 4511797 (1985-04-01), Pohlig et al.
patent: 4529900 (1985-07-01), Uzuka
Gottlieb, "Electric Motors & Electronic Motor-Control Techniques," pp. 140-141 (1976).

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