Position Sensorless Control of a 5kW Brushless DC Motor Drive Applied to Flywheel Energy Storage System

• Main Authors: Chih-Hao Chiu, 邱執豪
• Other Authors: Yuan-Chih Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/90791299478929774431

碩士 === 國立中正大學 === 電機工程研究所 === 101 === This thesis developments the position sensorless control of a brushless DC Motor drive applied to flywheel energy storage system in DC-microgrid by micro control unit. The system consists of a brushless DC motor brushless dc generator as dynamic load, a three-phase three-wire inverter, the auxiliary power supplies, a micro-controller and the auxiliary driving circuits. This thesis proposes the high-frequency signal injection combined with space-vector based feed-forward current control. A high frequency signal is injection into the three phase base frequency component. The motor current is feedbacked to obtain rotor angel and speed. The duty ratio is calculated by the micro controller. Finally, the position sensorless control is realized and verified by experimental results.