| Taking the world energy crisis and environmental pollution into consideration, hydraulic actuator will be replaced by electric power actuation as the trend of the development of advanced aerospace and transportation products in the future. With the continuous development and improvement of power actuating system, it is imperative that fault-tolerant permanent magnet (FTPM) motors with characteristics of high reliability, fault tolerance and high power density are used in the power actuator motor drive systems. Based on analyzing the advantages and disadvantages of single and dual redundant FTPMM control system, dual-winding FTPMM topology was proposed. Its control system is as reliable as dual redundant FTPMM control system, while its manufacturing costs are reduced and the space utilization is improved.Firstly, electric power actuation systems, fault tolerant technology and FTPMM were introduced at home and abroad, and a dual-winding fault-tolerant permanent magnet motor (DFTPMM) topology was put forward. Secondly, the dual winding structure and fault tolerance characteristics of DFTPMM were studied. Thirdly, analytic calculation method for the electromagnetic parameters of the motor was proposed, the basic relationships between electromagnetic parameters were analyzed, and the high accuracy calculating expression of inductance was obtained which laid the foundation for motor optimization design. Fourthly, the Finite Element Analysis (FEA) software Ansoft Maxwell was used to optimize motor design. Then, open and short circuit fault-tolerant control strategies of DFTPMM were proposed, the control circuit was built in Simplorer with the motor model imported from Maxwell2D and the joint simulation were conducted. The simulation results have verified the fault-tolerance control strategies of DFTPMM. Finally, performance test experiments of the manufactured motor were performed, and the results have verified the correctness of optimization design. |
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