Solenoid driver circuit for use with digital magnetic latching s

Details Solenoid driver circuit for use with digital magnetic latching s Solenoid driver circuit for use with digital magnetic latching s

1998-04-28

1999-11-09

Gaffin, Jeffrey

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361191, H01H 4736

Patent

active

059826053

ABSTRACT:
A solenoid driver circuit adapted for use with a digital magnetic latching olenoid which has first and second solenoid coils. The solenoid driver circuit includes a bridge circuit which receives a logic signal and first and second pulse signals. The solenoid driver circuit also includes a voltage source which provides a direct current and first and second resistors respectively connected to the first and second solenoid coils. The bridge circuit, responsive to the logic signal and the first pulse signal, provides a first current path from the voltage source through the first solenoid coil and the first resistor to ground and a second current path from the direct current voltage source through the second solenoid coil to ground. The bridge circuit, responsive to the logic signal and the second pulse signal, provides a third current path from the direct current voltage source through the first solenoid coil to ground and a fourth current path from the direct current voltage source through the second solenoid coil and the second resistor to ground. The current flow through the current paths which include a solenoid coil and a resistor is approximately one amp, while the current flow through the currents paths which include only a solenoid coil is approximately twenty six amps. This allows for high speed control of the forces acting on the actuator of the solenoid.

REFERENCES:
patent: 3683239 (1972-08-01), Sturman
patent: 3761730 (1973-09-01), Wright
patent: 4630166 (1986-12-01), D'Onofrio
patent: 4688138 (1987-08-01), Nagata et al.
patent: 5293551 (1994-03-01), Perkins et al.
patent: 5644280 (1997-07-01), Wilson et al.

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