Implementation of Parallel Resonant Half-Bridge DC-DC Converter

• Main Authors: Chih-Jung Lin, 林志融
• Other Authors: Yen-Shin Lai
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/19336853258899885985

碩士 === 國立臺北科技大學 === 電機工程系碩士班 === 91 === The objective of this thesis is to design and implement parallel resonant half-bridge converters to reduce the Electro-Magnetic Interference (EMI) and switching losses. The design specifications include: 155 V for input, 19 V for output, 90 W and 300 kHz for switching frequency. The load resonance is achieved by either varying the operation frequency or value of inductance of resonant tank. The resonant converters are analyzed by using the so-called “approximation analysis” method, which takes only fundamental component into consideration. Then the circuits are designed based upon the theoretical results. The designed circuits are implemented to verify the design process. Measured results demonstrate that 88% of efficiency for variable-inductor topology and 87.6% for variable-inductor plus variable-frequency topology can be achieved by the implemented converters, confirming the design and implementation.