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Traditional voltage-controlled commutation strategies are basically proposed to avoid detecting zero crossing problem of current-controlled commutation. Commutation problem is one reason of matrix converter can not be used in high-power environment. This paper proposes a novel four-step safe commutation strategy in transition intervals. The strategy resolves the short circuit phenomenon during changing...
This paper presents an innovative method for reducing current distortion on the ac side of six-pulse parallel-connected ac/dc rectifiers. The principle of the method is to modify the current waveforms on the dc side of the rectifier by using two self-commutated switches (insulated-gate bipolar transistors). It is demonstrated that accurate shaping of currents on the dc side achieves low distortion...
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