Control device for an electromagnet coil

Details Control device for an electromagnet coil Control device for an electromagnet coil

1998-12-16

1999-12-07

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 82, 363 90, 363125, H02M 3335, H02M 324, H02M 542, H02M 700

Patent

active

059994185

ABSTRACT:
Device designed to control a coil forming part of a solenoid valve, for example in a contactor type device.
A switching power supply 14 includes a winding S1 powering a control circuit 15 and another winding S2 placed with a switch T2 at the coil terminals. Switch T2 is controlled by the control circuit to power the coil in the hold phase starting from the switching power supply. This reduces disturbances during the hold phase.

REFERENCES:
patent: 4150423 (1979-04-01), Boschert
patent: 5023766 (1991-06-01), Laidler
patent: 5119283 (1992-06-01), Steigerwald et al.
patent: 5442534 (1995-08-01), Cuk et al.
patent: 5545971 (1996-08-01), Gomez et al.
patent: 5570276 (1996-10-01), Cuk et al.

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