Analysis and Implementation of Buck Converter with Low Output Current Ripple

• Main Authors: Chia-Ching Lin, 林家慶
• Other Authors: Huang-Jen Chiu
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/9y2z88

碩士 === 國立臺灣科技大學 === 電子工程系 === 107 === The thesis is to implement a buck converter with low output current ripple. In order to achieve the goal, this paper discusses the passive current ripple cancellation and stacked buck converter with current ripple cancellation respectively. The stacked buck converter can be classified into coupled inductor and separate inductor. After comparing the advantage and of the various methods, considering the output current ripple and transient response, finally choose stacked buck converter with coupled inductor as research direction. Although we can modify the switch signal to reduce the current ripple of the dead time. Further consideration of output current ripple that we can combine the stacked buck converter with LC filter. Deriving a small signal model of stacked buck converter with LC filter and discuss the transient response of the RC delay controller[1]. Under the condition of output power is 1kW, the stacked buck converter with LC filter reduce output current ripple effectively.