Soft-Switching of Switched Reluctance Motor

• Main Authors: Ming-Liang Chiu, 邱明亮
• Other Authors: Tzu-Shien Chuang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/06661608939656257393

碩士 === 明志科技大學 === 電機工程研究所 === 98 === In this thesis, soft-switching resonant converter was used. It allows a switched reluctance motor to be able to perform the soft-switching under the zero-voltage state. The circuit is composed of an auxiliary switch, resonant inductor and resonant capacitor. By using this resonant circuit, the switch can accomplish the switching action to achieve nearly zero switching loss at the very low voltage state. Moreover, the problems such as motor noise, heat loss and EMI can be improved. The switching frequency is allowed to be increased in order to improve the system performance. This article explains the details of the soft-switching circuit and the principle of the voltage current formula under the different operating mode. Moreover, the parameters for the resonant components are designed. When each phase current is tracked, the digital modulation is carried out to regulate the current’s error, the resultant signal is changed so that the DC-link voltage is forced to decrease down to zero and the zero-switching loss can be implemented.