An Improved Z-Source Boost-Buck Rectifier Topology with Lower DC Output Voltage

Abstract:

A Z-source boost-buck rectifier topology has been proposed to overcome the limitation of the conventional voltage source rectifier which is a boost rectifier. Conventional Z-source rectifier topology’s lowest dc output voltage is limited because increasing the shoot-through duty ratio and the modulation index simultaneously to obtain low dc output voltage is contradictory with the principle that the sum of M and D must be lower than 1. To overcome this contradiction, this paper proposes a novel topology for Z-source rectifier which can obtain lower dc output voltage with power factor correction and less input harmonic current. This paper firstly analyzes the proposed topology and makes a comparison with the conventional one. At last, the simulation results will be presented and verify its outstanding buck capability.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 2145-2150
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.2145
• Online since: November 2011
• Authors: Jian Shang, Zhi Zhen Liu, Yan Zhang, Si Hao Duan
• Keywords: Boost-Buck Rectifier, Buck Capability, Power Factor Correction (PFC), Z-Source Rectifier

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