Prime-mover dynamo plants – Electric control – Electric-starting motor
Patent
1988-12-12
1990-04-17
Paschall, M. H.
Prime-mover dynamo plants
Electric control
Electric-starting motor
361 33, F02N 1108, H02H 708
Patent
active
049174118
ABSTRACT:
An electronic starting motor control having low voltage protection. The starting motor has a solenoid coil which when energized causes solenoid contacts to be closed to energize the motor and to move a pinion into mesh with the ring gear of an engine to be cranked. A plurality of parallel connected field effect transistors connect and disconnect the solenoid coil to and from system direct voltage. When system voltage is below a predetermined value the field effect transistors are turned off and are maintained turned off until a start switch is opened. The system will not turn off the field effect transistors when short term voltages occur that go below the predetermined value. Various other circuits are disclosed for turning the field effect transistors on and off.
REFERENCES:
patent: 2017074 (1935-10-01), Prescott
patent: 2542712 (1951-02-01), Schneider et al.
patent: 3407306 (1968-10-01), Huntzinger
patent: 3784846 (1974-01-01), Krick et al.
patent: 4171533 (1979-10-01), Schrader
patent: 4586467 (1986-05-01), Raver
patent: 4731543 (1988-03-01), Buetemeister et al.
Research Disclosure No. 27844, Electric Engine Starter Control System, Jun., 1987.
Duncanson Jr. W. E.
General Motors Corporation
Meland C. R.
Paschall M. H.
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