Speed control device for electrical motor-driven apparatus

Details Speed control device for electrical motor-driven apparatus Speed control device for electrical motor-driven apparatus

1996-02-06

2000-08-22

Martin, David

Electricity: motive power systems

Alternating current commutating motors

Universal or a.c.-d.c. motors

318811, 318603, 318607, H02K 2364

Patent

active

061077623

ABSTRACT:
A speed control device particularly adapted for use with electrical motor-driven apparatus, stationary tools and hand tools having digital operator input controls. A semiconductor switching device controls a percentage of ON time for the electric motor in the electric motor-driven apparatus. Discrete and repeatable settings are selectable to a user through digital input switches.

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