Preliminary design of rim-electric driven propeller and effect factor analysis on cogging torque

Chinese Journal of Ship Research - - News -

YU Ping,ZHOU Junwei,ZHANG Guozheng School of Naval Architecture and Ocean Engineering,Harbin Institute of Technology at Weihai, Weihai 264209,China torque has an important influence on the blade vibration of a Rim-Elec⁃ tric Driven Propeller(REDP). In order to investigate a method for reducing the cogging torque of REDP, this paper analyzes the combination of slot number,pole number,tooth shape and pole arc coefficient on the influence of cogging torque.[Methods]First,according to the Ka4-50 propeller model parameters and the design standards of the Permanent Magnet Brushless DC Motor,a 36-slot and 26-pole driven mo⁃ tor is designed. The magnetic circuit calculation software Maxwell Rmxprt is then used to analyze the influ⁃ ence of different slot number and pole number combinations,tooth shape and pole arc coefficient on the motor.[Results]The results show that for a frictional slot and concentrated windings motor,the amplitude of the cogging torque is inversely proportional to the lowest common multiple. Among opening slots,closed slots and half-closed slots,half-closed slots have the greatest torque,opening slots have less and closed slots have the least. The influence of pole arc coefficient on cogging torque shows a fluctuation rule. In the design,it is necessary to find the extreme pole arc coefficient corresponding to the minimum value of the cogging torque through specific analysis.[Conclusions]This paper provides references for the overall de⁃ sign of REDP and a theoretical basis for further exploring the influence of the motor on the vibration and noise of REDP. torque Rim-Electric Driven Propeller REDP );permanent magnet brushless DC motor;slot shape

Abstract:[Objectives]Cogging words:cogging Key

收稿日期:2017 07 19网络出版时间:2018-4-11 8:42基金项目:国家自然科学基金资助项目(51309070);山东省自然科学基金资助项目(ZR2012EEQ004)作者简介:余平,男,1991年生,硕士生。研究方向:船舶电力推进。E-mail:[email protected]周军伟(通信作者),男,1981年生,博士,副教授。研究方向:船舶推进,叶轮机水动力学。E-mail:[email protected]

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