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Integrating the digital time control algorithm with DC-bus “notching” circuit based soft-switched inverter

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4 Author(s)
Baker, D.M. ; CRESTA, Curtin Univ. of Technol., Perth, WA, Australia ; Agelidis, V.G. ; Meng, C.W. ; Nayar, C.V.

A single-phase full-bridge bi-level inverter using a DC-link quasi-resonant circuit (QRC) to introduce a zero-volts interval across the DC bus for soft switching is discussed. It is demonstrated that the digital time control (DTC) algorithm, a method that belongs to the family of zero average current error (ZACE) methods, is a suitable technique to be integrated with a typical QRC DC-link soft-switched inverter. Experimental results taken from a low power single-phase current-controlled inverter prototype are documented. These include quasi-resonant circuit waveforms, inverter waveforms and electromagnetic interference (EMI) spectral characteristics

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Electric Power Applications, IEE Proceedings -  (Volume:146 ,  Issue: 5 )