Design of an Asymmetric Rotor Pole for Wound Field Synchronous Machines  

作　　者：Wenping Chai Byung-il Kwon 

机构地区：[1]School of New Energy,Harbin Institute of Technology at Weihai,Weihai 264209,China [2]Department of Electronic Engineering,Hanyang University,Ansan15588,South Korea

出　　处：《CES Transactions on Electrical Machines and Systems》2021年第4期321-327,共7页中国电工技术学会电机与系统学报（英文）

摘　　要：This study proposes a novel asymmetric rotor pole design for wound field synchronous machines(WFSMs),which can achieve high saliency ratio and also low torque ripple.The key point is the optimal design of the asymmetric rotor pole with the inverse-cosine-shaped(ICS)plus reverse 3rd harmonic shaping.The asymmetric rotor pole can help to improve the average output torque by enhancing the saliency ratio.The reverse 3rd harmonic shaping on the rotor pole surface is mainly used to reduce the torque ripple.To certify the effectivity of the proposed design,three-phase 54-slot/6-pole 4.7kW WFSMs with uniform air gap and with non-uniform air gap shaped by the ICS plus optimum reverse 3rd harmonic are utilized as the basic model and referenced model for comparison.For the referenced model,the optimum amplitude of reverse 3rd harmonic is preferred as 1/6.Finally,all electromagnetic characteristics of the investigated machines are predicted by the finite-element method(FEM).The highest saliency ratio and comparatively low torque ripple have been verified.

关 键 词：Asymmetric rotor pole high saliency ratio low torque ripple wound field synchronous machine 

分 类 号：TM341[电气工程—电机]