METHOD FOR SCALAR CONTROL OF MATRIX FREQUENCY CONVERTER Russian patent published in 2010 - IPC H02M5/257 H02M5/275 H02P27/08 

FIELD: electricity.

SUBSTANCE: invention may be used in frequency-controlled electric drive for control of three-phase voltage and frequency at the outlet of matrix converter, which is arranged on 9 transistors in units of array formed by crossings of t=1, 2 three-phase horizontal supply buses and j=1, 2 three-phase vertical buses of load. Transistors are switched with the help of control pulses, which are generated in compliance with equation , where is matrix, with size of 9x6, which is generated with the help of synchronising pulses with duration of π/3, matching intervals, in which interphase voltages of supply grid change in specified range; - six-dimensional vector of width-modulated primary control pulses, which are generated on high bearing frequency as a result of comparison of three-phase system of setting signals of harmonic shape with reference signal. The latter is produced by continuous integration of specified interphase voltages of grid and their inversion every time reference signal reaches specified threshold level.

EFFECT: maintenance of high quality of control in lower part of range with the possibility to establish any values of current shift coefficient at grid input.

2 cl, 3 dwg, 1 tbl