摘要
为了简化双极表贴式永磁游标电机(DP_SPMVM)拓扑结构,减少永磁体用量、提高转子强度,采用有限元法综合分析一种同极内嵌式永磁游标电机(CP_IPMVM)的电磁性能。所建立的CP_IPMVM和DP_SPMVM模型具有相同的尺寸参数和材料特性,DP_SPMVM和CP_IPMVM的磁力线走向一致,CP_IPMVM转子铁心极实现了DP_SPMVM转子上永磁体的效果。CP_IPMVM满足DP_SPMVM的工作原理,当永磁体极弧系数为0.6~0.7时,CP_IPMVM的转矩能力有极大值。取极弧系数0.6,与DP_SPMVM相比,虽然CP_IPMVM的气隙磁场中引入了额外的谐波分量,齿槽转矩和铁损稍高;但转子上永磁体的用量减少了2/5。转子转速为214 r/min时,空载电动势提高了~8%。当I rms<~9 A时,CP_IPMVM的输出转矩大于DP_SPMVM的输出转矩,当I rms>~9 A,CP_IPMVM的输出转矩小于DP_SPMVM的输出转矩。测得的空载电动势呈正弦变化,幅值与转速呈线性关系,传动比与设计值G r=3.5接近。
To simplify the topology structure of the dual-pole surface mounted permanent magnet vernier machine(DP_SPMVM),this paper analyzes the electromagnetic performances of a consequent-pole interior permanent magnet vernier machine(CP_IPMVM),which is equipped with less magnets and improves mechanical strength of rotor.The CP_IPMVM and DP_SPMVM are discussed under the same key dimensions and material configuration.The flux distributions of both machines are uniform,and the CP_IPMVM meets the DP_SPMVM operation principle.The output torque of CP_IPMVM approaches the maximum at 0.6 PM pole-arc-span ratio.Compared with the DP_SPMVM,the PM amount of CP_IPMVM is reduced by 2/5.The cogging torque and iron loss are slightly higher.The back electromotive force(back-EMF)shows an 8%growth at 214 r/min rotor speed.When I rms<~9 A,the output torque of CP_IPMVM is higher than that of DP_SPMVM.While I rms>~9 A,the output torque of CP_IPMVM is lower.The measured back-EMF of CP_IPMVM prototype addresses the sinusoidal feature.Its amplitude is linear with the rotor speed.The evaluated gear ratio is close to the design value G r=3.5.
作者
张进
张秋菊
ZHANG Jin;ZHANG Qiu-ju(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2020年第4期158-164,共7页
Electric Machines and Control
基金
国家自然科学基金(51575236)
江苏省研究生科研与实践创新计划项目(KYCX18_1839)。
关键词
永磁游标电机
同极内嵌式永磁体
转矩能力
空载电动势
传动比
vernier machine
consequent-pole interior permanent magnet
torque ability
back electromotive force
gear ratio
