Brushless doubly-fed motor dual electrical port slip-type vector control

To address the issues of high slip frequency and significant copper losses encountered during the wide-range speed regulation of brushless doubly-fed motors (BDFM) in electric vehicles and smart manufacturing, where single-port slip-type vector feedback linearization control and maximum torque per ampere control are commonly used, proposes a dual-electrical-port slip-type vector control scheme to enhance the overall operational efficiency of BDFM. Firstly, the mathematical model of the brushless doubly-fed motor is introduced. Secondly, the operational principles of the dual-electrical-port configuration are explained. Thirdly, a slip-type vector controller is designed based on rotor field orientation for both the power motor and the control motor, and the necessary conditions for implementing the control system are outlined. Finally, the proposed control algorithm is compared with the slip-type vector feedback linearization control algorithm under single-electrical-port control. The results indicate that the proposed control method reduces the slip loss by 86.8%, while the copper losses of the power motor and the control motor are reduced by 65.7% and 99.4%, respectively. These data also serve as strong evidence for the feasibility and superiority of the proposed method.