Controlled current supply circuit from a battery to a motor

Details Controlled current supply circuit from a battery to a motor Controlled current supply circuit from a battery to a motor

1979-06-08

1981-04-14

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318445, 318480, 318306, 318139, H02P 506

Patent

active

042622387

ABSTRACT:
To reliably turn OFF a pulse-controlled thyristor in series with a battery supplied motor circuit, in case of malfunction of the control circuit, or even of the supervisory circuit itself, the voltage across the thyristor is sensed and, if an ON condition of the thyristor, as represented by sensed voltage, is determined while the pulse source does not provide an ON command, a disabling control signal is applied to the pulse source to provide an OFF command; in case of failure of the sensing element, an additional voltage is supplied, through a time delay circuit to the disabling input. Time delay circuits are interposed between the respective sensed signal and command signal and applied through a logic circuit to prevent spurious operation of the monitoring and safety circuit.

REFERENCES:
patent: 3689818 (1972-09-01), Morton et al.
patent: 3902105 (1975-08-01), Delaney et al.
patent: 3925709 (1975-12-01), Mitchell et al.

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