Three-phase Impedance-Source Bidirectional AC/DC Converter

• Main Authors: HSU, JUI-PO, 徐瑞柏
• Other Authors: Yao-Ching Hsieh
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/n5b7ft

碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === In this thesis, the topology of three-phase AC-DC converters is studied. An impedance source (Z-source) topology together with traditional three-phase six-switch circuit to achieve the buck/boost function in single-stage structure. Traditional voltage source or current source inverter has the limitation that output voltage can only be less than or greater than the input voltage. The impedance source topology has combination of inductors, capacitors, and one auxiliary switch. The input port is neither a voltage source nor a current source. Therefore, the output voltage can be either higher or lower than the input. Besides, eliminating the potential hazard of short-through or open-circuit in voltage-source or current-source circuits, Z-source circuit possesses better reliability. In one of the two operation modes, the auxiliary switch can be passively mode, resulting an easier control mechanism. The control algorithm for a Z-source can be an extension based on convention control algorithm. This thesis implements a three-phase Z-source AC-DC converter with input voltage of 150 V and 200 V, output voltage of 110 Vrms and 500 W output power. According to the test results, it is confirmed that the effect can be buck/boost in single-stage structure.