AUTHORS: Konarik Roman, Prazenica Michal, Kascak Slavomir

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ABSTRACT: The paper deals with a single-leg direct (matrix) converter with minimum switching devices and enhancements for improving current THD and phase advancing with the use of variable (switched) capacitors. This converter is supplying single-phase induction motor (SPIM). Due to strongly non-harmonic phase voltages, an additional circuit should be used, so that phase-currents can be nearly harmonic. Simulations are done under both resistive-inductive load and motoric load. Speed control was realized using vector control with current controlled pulse-width-modulation (hysteresis regulator). Verification of such a drive system was done using dSpace environment. Preliminary results are given in the paper.

KEYWORDS: One-leg matrix converter, bi-directional switch, single-phase induction motor - SPIM, speed control, pulse width modulation, switched capacitor.

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[A] i m a i n i a u x Conference on Electrical Drives and Power Electronics (EDPE), The High Tatras, 21-23 Sept. 2015.

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