Control device for an electromagnet coil

摘要

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.