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Open AccessArticle

Pure Sinusoidal Output Single-Phase Current-Source Inverter with Minimized Switching Losses and Reduced Output Filter Size

1
Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, Hamamatsu 432-8561, Japan
2
National Laboratory for Energy Conversion Technology (B2TKE) of Agency for the Assessment and Application of Technology (BPPT), Tangerang Selatan 15314, Indonesia
3
Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, Hamamatsu 432-8561, Japan
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(12), 1556; https://doi.org/10.3390/electronics8121556
Received: 20 November 2019 / Revised: 12 December 2019 / Accepted: 16 December 2019 / Published: 17 December 2019
(This article belongs to the Special Issue Multilevel Converters)
This paper proposes a novel single-phase current-source inverter that generates a pure sinusoidal waveform with minimized switching losses and using a small-size output filter capacitor. The proposed method is investigated by incorporating a conventional multilevel current-source inverter with a linear amplifier. The conventional multilevel technique uses fundamental switching frequency instead of using high-switching frequency modulation for the H-bridge circuit. The linear amplifier such as class-A or class-D types has a function to reform the staircase waveform generated by the multilevel inverter into a pure sinusoidal by using superimposition technique. As a result, pure sinusoidal output current is generated with a small ripple and the system only requires a small output filter capacitor for smoothing the waveform. Based on the simulation and experimental results, the proposed system presents not only the optimal configuration, but also an option as to whether to obtain excellent power efficiency or very low output harmonic. Implications of the results and future research directions are also presented. View Full-Text
Keywords: current-source; multilevel inverter; linear amplifier; superimposition current-source; multilevel inverter; linear amplifier; superimposition
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Priandana, E.R.; Noguchi, T. Pure Sinusoidal Output Single-Phase Current-Source Inverter with Minimized Switching Losses and Reduced Output Filter Size. Electronics 2019, 8, 1556.

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