Multiple-output resonant matrix converter for multiple-inductive-load systems

Most of the ac-ac converters used in home-appliances are based on single-output dc-link inverters, which provides a cost-effective and straight-forward solution. However, this two-stage power conversion decreases power density and efficiency. Direct ac-ac conversion has been thoroughly studied in the past. However, the complex control scheme and higher cost has prevented it from being used in low-cost applications, such as home appliances. This paper proposes the direct ac-ac conversion by means of a multiple-output resonant matrix converter applied to multiple-inductive load systems. The proposed topology reduces significantly the number of devices and complexity, leading to an efficient, versatile and cost-effective solution. The analytical and simulation results have been verified by means of a prototype applied to a novel total-active-surface induction heating appliance.