DEVICE CONTROLLING ELECTROMAGNET Russian patent published in 2002 - IPC

FIELD: electrical engineering. SUBSTANCE: device can be employed to boost drive electromagnets of commutation apparatuses, to control over electromagnets of various automatic equipment fed from source of constant voltage. Device includes elements of logic function of repetition and equivalence, AND gate, series RC circuit forming duration of first pause of voltage across winding, unit stabilizing capacity of heat loss in electromagnet winding in process of hold-up condition comprising resistive voltage divider and output network incorporating MOS transistor, resistor, diode. Input of follower is connected to common connection point of resistor and capacitor of RC circuit setting duration of boosting pulse of turn on of electromagnet and to second diode. Output of follower is connected to input of element of equivalence via resistor of series RC circuit forming duration of first pause of voltage across winding, to input of element of equivalence, to blocking input of generator of rectangular pulses. Output of element of equivalence is connected to first input of logic AND gate whose second input is connected to output of generator of rectangular pulses, to resistor of series RC circuit. Output of AND gate is connected to control electrode of transistor key. Output network of unit stabilizing capacity of heat loss in electromagnet winding in process of hold-up condition is placed in parallel with resistor of setting RC circuit of generator of rectangular pulses. EFFECT: reduced capacity of heat loss, prolonged service life of device. 3 dwg