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In this paper, a method of maintaining high power conversion efficiency across the entire load range of a three-phase micro-inverter is proposed. The proposed control method substantially increases the conversion efficiency at light loads by minimizing switching losses of semiconductor devices as well as core losses of magnetic components. This is accomplished by entering a phase skipping operating...
In the three-phase micro-inverter developed at the Florida Power Electronic Center (FPEC), maximum efficiency is achieved when it is operating at close to its rated power. At lower power, load independent loss becomes a larger part of the overall loss and negatively impacts efficiency. It is therefore advantageous to operate each phase as close to its rated power as possible. One way to accomplish...
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