LOAD-HANDLING ELECTROMAGNET CONTROL DEVICE Russian patent published in 1994 - IPC

FIELD: electric technique. SUBSTANCE: device for control of load-handling electromagnet 1 has three phase power transformer 2, three controllable thyristorized gates 9, 10, 11, first and second thyristors 12 and 13, single-phase bridge rectifier 14, first relay 15 with one break contact 16 and four make contacts 18, 17, 19, 20, timer 25 with one made contact 26 with a time delay for disconnection, four-channel two-position switch 27, three resistors 39, 40, 51, five diodes 44-48. The device is characterized in that it has second auxiliary relay 21 with four make contacts 22, 23, 24, 65, three capacitors 61, 62, 63, four diodes 49-51, 64 and two resistors 42, 43 so as to widen a control range of handling capacity of electromagnet. EFFECT: widened control range. 1 dwg