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This paper presents a unidirectional neutral-point-clamped three-level four-wire AC-DC-AC converter topology and studies how space vector modulation and vector control can be applied to the converter. It is shown that either the rectifier or inverter can utilize discontinuous modulation if the injected zero-sequence voltage is properly chosen and a method for balancing the partial DC-link voltages...
This paper proposes a power factor control strategy for a current source drive with active front end, where the selective harmonic elimination (SHE) modulation is employed for the rectifier and a combination of space vector modulation (SVM) and SHE is used for the inverter to guarantee best waveforms at a low switching frequencies. The proposed power factor compensation strategy comprises two methods:...
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