Variable-Frequency Pulse-Width Modulation for an Improved Grid-Connected Converter Efficiency

This paper presents a high-efficient three-phase DC- AC grid-connected converter rated at 150 W. Two fundamental aspects led to the high efficiency, e.g. 96.2% at nominal power which corresponds to only 5.9 W losses. First, over the whole operation range, the converter operates as a resonant pole in...

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Bibliographic Details
Published in2008 IEEE Industry Applications Society Annual Meeting pp. 1 - 6
Main Authors Dick, C.P., Biskoping, M., Richter, S.A., De Doncker, R.W.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2008
Subjects
Economic indicators
Inductors
Pulse modulation
Pulse width modulation
Pulse width modulation converters
Pulse width modulation inverters
Resonance
Space vector pulse width modulation
Switching converters
Zero voltage switching
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Summary:This paper presents a high-efficient three-phase DC- AC grid-connected converter rated at 150 W. Two fundamental aspects led to the high efficiency, e.g. 96.2% at nominal power which corresponds to only 5.9 W losses. First, over the whole operation range, the converter operates as a resonant pole inverter (RPI), thus zero voltage switching at turn on is achieved. Second, the variable-frequency pulse-width modulation is optimized to a minimum rms-current in the filter inductor, leading to minimized conduction and inductor losses. Different experiments qualify the losses of the circuit components. A comparison between the conventional RPI and the PWM converter is given.
ISBN:9781424422784
1424422787
ISSN:0197-2618
2576-702X
DOI:10.1109/08IAS.2008.314