Frequency Response Analysis of Boost DC-DC Converters with Peak Current-Mode Control

• Main Authors: Chien-Min Lee, 李健民
• Other Authors: 賴炎生
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/p3dgsp

碩士 === 國立臺北科技大學 === 電機工程系研究所 === 95 === This thesis presents a new alternative switch network and alternative parameter table based upon averaged switch model to derive the voltage loop transfer function relevant to peak current mode control of boost converter. The presented alternative switch network simplifies the conventional switch network and provides the physic features of circuit as compared to conventional approach. In current loop, accurate current loop transfer function is derived using the method of Sample and Hold, and thereby designing the controller and slope compensator. Moreover, the steps and restriction of measurement of Closed-loop transfer function is discussed in this thesis. It is found that the measured gain is increased due to the extra small signal path provided by the 10Ω resistor of spectrum analyzer. A modified formula is presented in this thesis to improve the gain of measured Bode Plot. The theoretical result is confirmed by measurement results.