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.