Implementation of an LLC Resonant Converter with Digital Control

• Main Authors: Yi-Hung Chen, 陳宜宏
• Other Authors: 黃明熙
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/zmhdwr

碩士 === 國立臺北科技大學 === 電機工程系所 === 98 === The object of this thesis fcouses on the implementation of a digitized LLC resonant converter, and its power flow is controlled by changing frequency of the square wave which is yielded a digital signal processor.Two inductors, one leakage inductance and one magnetizing inductance of transformer, and a capacitor connected in series are used to function LLC resonance, which makes the primary-side and secondary-side switches to reach zero-voltage switching and zero-current switching respectively. Due to the ZCS and ZVS yielded by the LLC converter, the switching loss is reduced and the system efficiency is enhanced. Furthermore, a synchronous rectification technique is added in the secondary side to increase the system efficiency. In order to build up a complete development environment for analysis and design, the simulation models of LLC converter are established by both IsSpice and MatLab. Finally, an LLC converter with 400V input and 12V/17A output is operated by a Microchip dsPIC30F2023-based controller to verify the effectiveness of proposed simulation environment and control methodologies.