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Load commutated inverters with multiple three-phase configurations are widely used in high-power synchronous motor drives due to its robustness and reliability. However, harmonic problems, poor starting performance and the limited upper frequency are the issues to be addressed. In this paper, a novel six-phase inverter system, consisting of two main three-phase inverters and an additional five-level...
This paper presents a simple and low cost single-phase to three-phase cycloconverter topology for driving an induction motor with a single-phase ac supply. Only seven naturally communicated thyristors and one phase balancer capacitor are employed, so the resulting cycloconverter-motor drive system is cheap and compact. Using discrete hopping frequency technique, a single-phase to three-phase modulation...
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