Four state DC motor controller

Details Four state DC motor controller Four state DC motor controller

1984-06-08

1985-07-02

Shoop, William M.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

307270, H02P 122

Patent

active

045271038

ABSTRACT:
A driver circuit for a transistor bridge is selectively controllable to produce four state operation of a DC motor. The driver circuit has two control inputs yielding four distinct input combinations, each combination producing a different state of motor operation. The states which may be selectively produced are (1) motor off or coasting, (2) motor on, counterclockwise rotation, (3) motor on, counterclockwise rotation and (4) motor off, dynamic braking.

REFERENCES:
patent: 3371259 (1968-02-01), James et al.
patent: 3427520 (1969-02-01), Oppedahl
patent: 3611092 (1971-10-01), Wilmunder
patent: 4146801 (1979-03-01), Vali et al.
patent: 4267492 (1981-05-01), Manners
patent: 4275340 (1981-06-01), Schleupen
patent: 4319170 (1982-03-01), Brent
patent: 4447768 (1984-05-01), Terui

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