A Three Phase Three-level PWM Switched Voltage Source Inverter with Zero Neutral Point Potential


Vol. 5, No. 3, pp. 224-232, Jul. 2005
10.6113/JPE.2005.5.3.224


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 Abstract

A new three phase three-level Pulse Width Modulation (PWM) Switched Voltage Source (SVS) inverter with zero neutral point potential is proposed. It consists of three single-phase inverter modules. Each module is composed of a switched voltage source and inverter switches. The major advantage is that the peak value of the phase output voltage is twice as high as that of a conventional neutral-point-clamped (NPC) PWM inverter. Thus, the proposed inverter is suitable for applications with low voltage sources such as batteries, fuel cells, or solar cells. Furthermore, three-level waveforms of the proposed inverter can be achieved without the switch voltage imbalance problem. Since the average neutral point potential of the proposed inverter is zero, a common ground between the input stage and the output stage is possible. Therefore, it can be applied to a transformer-less Power Conditioning System (PCS). The proposed inverter is verified by a PSpice simulation and experimental results based on a laboratory prototype.


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Cite this article

[IEEE Style]

W. Oh, S. Han, S. Choi, G. Moon, "A Three Phase Three-level PWM Switched Voltage Source Inverter with Zero Neutral Point Potential," Journal of Power Electronics, vol. 5, no. 3, pp. 224-232, 2005. DOI: 10.6113/JPE.2005.5.3.224.

[ACM Style]

Won-Sik Oh, Sang-Kyoo Han, Seong-Wook Choi, and Gun-Woo Moon. 2005. A Three Phase Three-level PWM Switched Voltage Source Inverter with Zero Neutral Point Potential. Journal of Power Electronics, 5, 3, (2005), 224-232. DOI: 10.6113/JPE.2005.5.3.224.