A Novel Control Strategy Based on Virtual dc Voltage Feedback for an Improved Three-Phase to Single-Phase Matrix Converter

Abstract:

This paper presents an improved topology for three-phase to single-phase matrix converter (3-1 MC), and discusses the power decoupling method, closed-loop control strategy, etc. These studies make the single-output MC have good features, such as sinusoidal input current, low total harmonic distortion (THD), compensating the shortcomings of traditional 3-1 MC caused by the output power pulsation. According to the improved scheme, a novel closed-loop control strategy based on virtual dc voltage feedback is proposed. The strategy completes the closed-loop control of 3-1 MC by taking the virtual dc voltage as outer-loop controlled variable and the input current as inner-loop controlled variable. Consequently, the power factor correction (PFC) of 3-1 MC is achieved, and the control stability is improved. Finally, a series of stimulation and experiments for a prototype with 115V/400Hz output are conducted, the results show that the power decoupling method and control strategy are practically correct and feasible.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 2452-2458
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.2452
• Online since: February 2013
• Authors: Wen Bin Zhang, Hong Juan Ge
• Keywords: Matrix Converter, Power Decoupling, Power Factor Correction (PFC), Three-Phase to Single-Phase, Virtual DC Voltage Feedback

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