Design and Implementation of a Bidirectional Buck-Cascaded Buck-Boost Inverter with Active Power Filtering

• Main Authors: Chao-Ling Shen, 沈兆瓴
• Other Authors: Chien-Hsuan Chang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/7m34kg

碩士 === 義守大學 === 電機工程學系 === 105 === The thesis presents a bidirectional buck-boost inverter for active power filtering. The circuit consists of a bidirectional buck-cascaded buck-boost inverter and an full-bridge unfolding circuit. The circuit operates with either step-down or step-up operation principle. Part of the energy can be directly delivered to output terminal to improve efficiency. In addition, only two switches operate with high frequency switching at the same time, which can reduce the switching losses. The proposed circuit can work as either step-down or step-up inverter, so that the dc-bus voltage can be reduced. Operation principles and circuit analysis of the proposed converter are addressed. Finally, a prototype circuit is implemented and tested to verify the accuracy and feasibility of the proposed circuit.