DEVICE FOR CONTROL OVER VOLTAGE ACROSS TWO-SECTION LOAD Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: two sections 1 and 2 of load are fed from single-phase A. C. network 3 through controlled rectifier which controls rectified voltage and includes three pairs of thyristor keys 6, 7; 8, 9 and 10, 11 and two pairs of discharge diodes 12, 13 and 14, 15. Two formers 20 and 21 of controlling pulse are used for phase-pulse control over thyristor keys. Outputs of common signal former 24 and output of bias voltage sources 29 are linked to proper inputs of formers of controlling pulses. For stabilization of preset value of current first input of common former 24 is connected to setting unit 31 and its second input is linked with feedback coupling to current pickup 33. EFFECT: enhanced operational characteristics. 3 dwg