Electromagnet control circuit providing energy saving - allows periodic opening and closing of switch to reduce holding power for electromagnet

摘要

The control circuit uses a controlled switch (5) in series with the magnetic coil (6), operated via a transistor control with an RC element for periodic opening and closing of the switch to reduce the holding power. The control circuit has an inverter module, with two inverter stages (12,13) for the switching pulses, two RC elements (11,14,15,16) and two inverter stages (21,22) for the periodic clock pulses, with a pair of diodes (25,27) and two further inverter stages (18,19) for direct control of the switch. Pref., an electronic switch with a low input capacitance is used. ADVANTAGE - Energy-saving operation of electromagnet.