Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Patent
1988-03-25
1989-05-23
Shoop, Jr., William M.
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
318365, 388810, 388910, 388912, 388921, H02P 500
Patent
active
048333751
ABSTRACT:
A digital motor control system includes a flip-flop latch for receiving motor circuit drive data from a microprocessor, a counter for counting to a predetermined value representing the total duration of a motor drive pulse, a comparator for comparing the incrementing counter value with the motor circuit drive data stored in the latch to provide a pulse width modulated signal, delay circuitry for preventing overlapping of motor brake and motor drive signals, a drive gate controlled in part by said pulse width modulated signal for applying a drive signal for motor control, and a brake gate for applying a brake signal for motor control.
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U.S. patent application Ser. No. 173,386, filed Mar. 25, 1988, inventor James R. Del Signore II, assigned to NCR Corporation.
Hawk Jr. Wilbert
Martin David
NCR Corporation
Sessler Jr. Albert L.
Shoop Jr. William M.
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