Development of DSP-Based Bi-directional DC-DC Power Converters

• Main Authors: Syu-Fong Chang, 張旭鋒
• Other Authors: Sheng-Nian Yeh
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/z2rvew

碩士 === 國立臺灣科技大學 === 電機工程系 === 94 === This thesis presents the design and implementation of a digital signal processor based bi-directional dc-dc power converter for battery charge and discharge. When power converters operate at boost mode, the low-voltage side battery will discharge and provide power for dc-link; while at buck mode, the high-voltage side dc-link will charge the battery. The output voltage can be steady with voltage and current feedback control. The high-frequency transformer which uses two windings in parallel with power converter, together with the use of interleave control will split input current and raise the efficiency of conversion. In buck mode, the power switches are operated by phase-shifted control with soft switching and thereby reduce switching loss. The 16-bit digital signal processor, TMS320LF2407A, is used to implement the control function of the system. Experiments of 500W power converter are given. The terminal voltage range of battery is 20V~27V, and the dc-link voltage is 300V. The efficiency at full load of boost and buck modes are 88% and 92%, respectively.