Control device for electromagnetic drive e.g. for switching device, has drive coil connected in series between 2 controlled electronic switches

摘要

The control device (2) has a first controlled electronic switch (16) connected in series with the drive coil (4) of the electromagnetic drive via a timing element (12), upon application of a control voltage (Ue) and a second controlled electronic switch (22) connected in series with the drive coil upon application of the control voltage. The operating voltage is supplied to a control input (6) connected to a rectifier (8) providing a smoothed operating voltage (Ub), fed to the timing element and a DC voltage converter (10) providing a smoothed holding voltage (Uh) applied across the drive coil and the control input of the second controlled electronic switch.