DEVICE FOR LIMITING CHARGING CURRENT FOR NETWORK POWER SUPPLY Russian patent published in 1994 - IPC

FIELD: current converters. SUBSTANCE: device has thyristor starting pulse forming circuit 5 which is formed by diode 15, circuit which has three circuits connected in parallel. The first circuit has capacitor 16, the second one has resistor 17 and dinistor 18, connected in series. The third circuit has resistor 19 and light-emitting diode 20 of transistor photon-coupled pair connected in series. Reliability of the device is increased due to reduction in milking current amplitude of capacitor 3 of input filter by means of turning on the first thyristor 5 brought into charging circuit of capacitor 3 at minimal voltage between anode and cathode of the thyristor. EFFECT: reduced losses in control circuit of thyristor due to application of pulse method of control. 1 dwg