Charge compensation modulation method of partial-resonant AC-link inverter
2015
A novel modulation strategy for soft-switched, partial-resonant, high-frequency AC link inverters (PRAC) is proposed. The proposed method operates on a cycle-by-cycle basis, integrating link current and precisely controlling charge delivered to each output phase in one link cycle. Link current is measured in a high-speed, low-latency loop. By employing the proposed modulation strategy, very low total harmonic distortion of the output current waveform is achieved, resulting in small output filters. The validation of the proposed modulation strategy is carried out by numerical simulation using Matlab-Simulink software and experimental measurements on hardware prototype. Relevant results are disclosed and discussed in details in this paper.
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