摘要
针对电液伺服阀和比例阀电-机械转换器能耗较大的不足,研制了一种低功耗、耐高压双向线性力马达.该力马达基于永磁极化磁通与线圈控制磁通差动控制的工作原理,通过梯形极靴及凹槽等结构设计克服了位移-力特性的非线性,减小了非工作气隙,提高了电磁转换效率.通过建立有限元模型,仿真分析了该力马达在不同激励电流和位置下的磁场分布,探讨了该力马达的位移-力输出特性成因及特性。仿真结果与实验结果吻合,表明该力马达具有正磁弹簧刚度的位移-力特性、良好的线性度、较小的滞环和较低的功耗。
A bi-directional linear force motor with low power consumption was presented aiming at the disadvantage of high power consumption of conventional electromechanical converter for electro-hydraulic servo and proportional valves. The motor overcomes the nonlinearity of force-versus-position characteristics, reduces non-operating air-gaps and improves electromagnetic transfer efficiency by designing dovetail polehead and groove based on the principle of differential control formed by permanent-magnet polarizing flux and control flux produced by coil. The flux distribution under different exciting currents and positions was simulated based on the finite element model, and the cause and characteristics of stroke versus displacement were discussed. The simulation results accorded with the experimental results. The motor has positive magnetic spring stiffness, high level of linearity, low hysteresis and low power consumption.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2009年第1期135-137,171,共4页
Journal of Zhejiang University：Engineering Science
关键词
力马达
功耗
特性
非线性
磁弹簧
刚度
force motor
power consumption
characteristics
non-linearity
magnetic spring
stiffness
