Abstract
Z-source inverters are proposed as single-stage power converters with buck-boost energy conversion ability. But their voltage boost inversion capability is limited. This paper proposes an enhanced Z-source inverter. Compared to the traditional Z-source inverter, it can obtain high voltage conversion factor with a short shoot-through duration, and can decrease Z-source capacitor voltage stress significantly. Moreover, a novel modulation of proposed Z-source inverter is presented to obtain same voltage gain as maximum constant boost control retaining the switching frequency unchanged. And it can greatly reduce the L and C volume in the Z-network under the six shoot-through intervals per carrier period. Simulation and experimental results have demonstrated the merits of the proposed method.
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Acknowledgments
This work was supported by the Natural Science Foundation of Shandong Province of China (ZR2010EM065). The authors thanks for the financial support.
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© 2012 Springer-Verlag London Limited
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Cai, C., Qu, Y., Sheng, K. (2012). Novel Modulation of Enhanced Z-Source Inverter to Minimize Switching Frequency and Volume of the Z-Source Passive Components. In: Wang, X., Wang, F., Zhong, S. (eds) Electrical, Information Engineering and Mechatronics 2011. Lecture Notes in Electrical Engineering, vol 138. Springer, London. https://doi.org/10.1007/978-1-4471-2467-2_34
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DOI: https://doi.org/10.1007/978-1-4471-2467-2_34
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