Development of Regenerative Braking Control System for DC-Excited Flux Switching Machine

• Main Authors: Chung-Wen Yu, 余忠温
• Other Authors: Sheng-Ming Yang
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/pmsb68

碩士 === 國立臺北科技大學 === 電機工程系 === 106 === Regenerative braking is often employed to extend traveling distance of electric vehicles. This scheme is generally implemented with a bidirectional DC/DC converter in the DC-link to recover braking energy and a battery for energy storage. Thus, considerable increase of hardware and cost is needed. This thesis investigates a regenerative braking control strategy for a DC-excited flux switching machine. The machine was designed to drive small electric scooters. The relationships between recovery energy and motor drive losses are analyzed for the optimal braking conditions. A regenerative braking control strategy is proposed. The system only requires a simple modification to the field driver circuit with the addition of a super capacitor for energy storage. Regenerative braking is realized with the integration of circuit mode switching and control. Experiments are performed to verify the proposed control strategy. The measured losses are generally agreed with the analytic calculations. Moreover, dynamic test results show that the braking energy can be recovered and reused with the proposed strategy. Therefore, total energy used for periodic driving cycles reduced considerably.