Study and Implementation of Paralleled-Bidirectional DC-DC Converters with Monitoring Technique

• Main Authors: Ming-Sheng Zheng, 鄭明憲
• Other Authors: Tsorng-Juu Liang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/40042671444868144956

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 93 === 　In this thesis, DSP-based paralleled bidirectional dc/dc converters are designed and implemented. By using TI TMS320LF2407 DSP and automatic master-slave current-sharing technique, the converters can equally share the load current. In normal operation, the converters supply energy from system bus terminal to battery terminal. When the residual capacity of battery is insufficient, the converters charge battery with constant current. When the residual capacity of battery is sufficient, the converters charge battery with constant voltage. In utility power failure condition, the converters are operated in the discharge mode, that energy is transferred from battery terminal to system bus terminal. The experimental results show that the current-sharing error is within 5% and voltage regulation is 0.26%. 　In addition, the communication between computer and DSP is implemented via an RS-232 interface. By using the Visual Basic real-time monitoring program, the currents of three converters, input voltage, output voltage and the battery temperature are displayed on the remote monitoring system.