Electricity: motive power systems – Braking – By auxiliary electric generator or by magnetic attraction or...
Patent
1979-01-22
1982-11-23
Smith, Jr., David
Electricity: motive power systems
Braking
By auxiliary electric generator or by magnetic attraction or...
318331, 318417, H02P 516
Patent
active
043607683
ABSTRACT:
A motor control circuit for providing high acceleration currents by providing a driver comprising a transistor operating in the saturated region in parallel with a transistor operated in the nonsaturated region. The saturated transistor supplies the heavy accelerating current while the nonsaturated transistor is controlled to provide an increasing current through the accelerating period to make up for drops in the current flows through the saturated transistor due to build up of back emf in the motor.
REFERENCES:
patent: 2928009 (1960-03-01), Powell
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patent: 3383578 (1968-05-01), Lewis
patent: 3617845 (1971-11-01), McKenna
patent: 3706020 (1972-12-01), Klang
patent: 3740634 (1973-06-01), Bonzano
patent: 3803471 (1974-04-01), Price et al.
patent: 4017745 (1977-04-01), McMahon
Corner Gary W.
Jorgenson Gary W.
International Business Machines - Corporation
Rohrer Charles E.
Smith Jr. David
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