Electromagnetic load drive apparatus

Details Electromagnetic load drive apparatus Electromagnetic load drive apparatus

2005-05-31

2005-05-31

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

C361S155000, C361S156000

Reexamination Certificate

active

06900973

ABSTRACT:
A drive apparatus supplies electric power to a solenoid of an inductive load from a battery and a capacitor to improve response of the load. The drive apparatus comprises switches for switching between a first state where a negative side of the battery is connected to a positive side of the battery, and a second state where the negative side of the capacitor is connected to the negative side of the battery. When the load is in operation, the voltage applied to the solenoid is raised by the voltage of the battery as the first state, so that the current flowing into the solenoid rises sharply to improve response of the load. When the operation of the load is to be stopped, the electric power to the solenoid is interrupted, and the energy accumulated in the solenoid is recovered by the capacitor as the second state.

REFERENCES:
patent: 3708726 (1973-01-01), Puvogel
patent: 4933805 (1990-06-01), Calfus
patent: 4950974 (1990-08-01), Pagano
patent: 5491623 (1996-02-01), Jansen
patent: 5532526 (1996-07-01), Ricco et al.
patent: 5952738 (1999-09-01), Miller
patent: 548 915 (1993-06-01), None
patent: 57060811 (1982-04-01), None

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