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X. P. Ding，Z. M. Qian，B. Cui，et al., “Fuzzy PID Controller for DC-link Boost Voltage in Z-source Inverter,” Proceedings of the CSEE, Vol. 28, No. 24, 2008, pp. 31-38.

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• TITLE: The Control Technology Research of the Z-source Three-phase Four-bridge Arm Inverter

  AUTHORS: Xiangli Li, Zhaoyang Yan, Keke Pan, Chenghao Ma, Hanhong Qi

  KEYWORDS: Z-source Inverter; Three-phase Four-leg inverter; Unbalanced Load; Imbalanced Voltage

  JOURNAL NAME: Energy and Power Engineering, Vol.5 No.4B, November 7, 2013

  ABSTRACT: Z-source inverter can boost the voltage of the DC-side, allow the two switches of the same bridge arm conducting at the same time and it has some other advantages. The zero-sequence current flows through the fourth leg of the three-phase four-leg inverter so the three-phase four-leg inverter can work with unbalanced load. This paper presents a Z-source three-phase four-leg inverter which combines a Z-source network with three-phase four-leg inverter. The circuit uses simple SPWM modulation technique and the fourth bridge arm uses fully compensated control method. The inverter can maintain a symmetrical output voltage when the proposed scheme under the unbalanced load.