Pulse motor control device

Details Pulse motor control device Pulse motor control device

1994-12-05

1995-12-19

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 84, 361 86, 361 92, H02H 709

Patent

active

054774110

ABSTRACT:
A pulse motor control device comprises, as additional component parts, a power-off detecting circuit, and a turning-off circuit. The power-off detecting circuit detects, when a driving switch is turned off, a dropping of a voltage supplied to a driving circuit and outputs a power-off detection signal. The turning-off circuit includes diodes and a control resistor. The diodes are connected respectively to control terminals of all driving transistors of the driving circuit. When the control transistor is turned on in response to the power-off detection signal, voltages of control terminals of the driving transistors are dropped to the ground level through the diodes, thereby turning off the driving transistors.

REFERENCES:
patent: 4633358 (1986-12-01), Nagano
patent: 4772977 (1988-09-01), Bottrell et al.
patent: 5306990 (1994-04-01), Hofsaee et al.

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