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


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.

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X. Li, Z. Yan, K. Pan, C. Ma and H. Qi, "The Control Technology Research of the Z-source Three-phase Four-bridge Arm Inverter," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 733-739. doi: 10.4236/epe.2013.54B142.

Conflicts of Interest

The authors declare no conflicts of interest.


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