Two-speed motor

Details Two-speed motor Two-speed motor

1989-02-21

1990-03-20

Skudy, R.

Electricity: motor control systems

Open loop speed control system for dc motor with commutator

Analog armature control

310136, 310138, 310154, 310261, 318292, 318541, H02P 500

Patent

active

049107909

ABSTRACT:
A two-speed permanent magnet D.C. electric motor has a housing, permanent magnets carried by the housing, and an armature assembly installed in the housing. The armature assembly has a shaft rotatably mounted in the housing, first coil windings, a first commutator connected to the first coil windings, second coil windings and second commutator connected to the second coil windings. A first set of brushes is carried by the housing and engages the first commutator for applying a D.C. voltage to the first coil windings to cause rotation of the armature assembly at a first speed. A second set of brushes is carried by the housing and engages the second commutator for applying the same D.C. voltage to at least the second coil windings to cause rotation of the armature assembly at a second speed.

REFERENCES:
patent: 2408210 (1946-09-01), Heddleson et al.
patent: 2814770 (1957-11-01), Tourtellot
Patent Abstracts of Japan, vol. 4, No. 90 (E--17) (573), 28th Jun. 1980; JP--A--55 56 457 (Tokyo Shibaura Denki K. K.) 25--04--80, whole abstract.

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