METHOD OF CONTROL OF TRANSFORMER OF THREE-PHASE VOLTAGE INTO HIGH-FREQUENCY SINGLE-PHASE VOLTAGE AND DEVICE FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2008 - IPC H02M5/27 

FIELD: electricity.

SUBSTANCE: method and device that implements it are intended for control of three-phase voltage transformer into high-frequency single-phase voltage and may be used in devices for precision melting of metals, growth of single crystals, shaping under conditions of superplasticity and other accurate thermal-electric technologies. Method of control consists in supply of pulses with the help of control device to power switches and differs by the fact time intervals between supplied pulses are determined based on the ration of Δt_n=T/6Nsin²(πn/N+π/3), where T - period of supply network sinusoidal voltage change, N - number of pulses in packet, n - number of interval (n=1÷N).

EFFECT: expansion of application field of voltage transformer by increase of output power stabilisation accuracy.

3 cl, 11 dwg