无刷双馈电机的双电气端口转差型矢量控制

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

  • 摘要: 为了解决无刷双馈电机(brushless doubly-fed motor, BDFM)单端口转差型矢量反馈线性化控制和最大转矩电流比控制在电动汽车和智能制造领域进行宽范围调速时存在转差频率大、铜损大的问题,提出了双电气端口的转差型矢量控制方案,以提高BDFM整体的运行效率。首先,介绍了无刷双馈电机的数学模型;其次,介绍了双电气端口运行的工作原理;再次,按照功率电机和控制电机转子磁场定向设计了转差型矢量控制器,同时给出了控制系统实现的必要条件;最后,将该控制算法与单电气端口控制下的转差型矢量反馈线性化控制算法进行对比,结果表明所提控制方法转差损耗降低了86.8%,同时功率电机铜损耗降低65.7%,控制电机的铜损耗降低99.4%,充分验证了该方法的可行性和优越性。

     

    Abstract: 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.

     

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