Design and Implementation of a Non-isolated Bidirectional Converter

• Main Authors: Chi, Hsin-Ya, 紀欣亞
• Other Authors: Wu, Tsai-Fu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/35937579946654339828

碩士 === 國立中正大學 === 電機工程研究所 === 100 === This thesis presents design and implementation of a non-isolated bidirectional DC/DC converter with high efficiency, low cost and small volume for DC power system applications. The topology of this circuit is a combination of a buck converter and a boost converter. In the circuit, a dsPIC30F2023 chip realizes almost all of the functions, such as circuit protection, generation of pulse-width modulation (PWM) signals and A/D conversion, etc. If the load voltage drops below the set point, the converter operates in buck mode to regulate the load voltage. If the load power is higher than the desired value and the voltage at the battery side is low, the converter operates in boost mode. If the load voltage and the battery voltage are regulated within the desired ranges, the converter operates in idle mode. Finally, we implemented a 6 kW non-isolated bidirectional DC/DC converter to verify the feasibility and characteristic of the circuit.