摘要
电磁平衡头是近十几年出现并发展起来的一种新型在线动平衡装置。由于其磁性盘为一内齿轮结构,其与永磁体之间因此存在齿槽转矩,影响平衡头运动的平稳性。本文设计了一款电磁平衡头,分析了其运行原理,同时基于Ansoft-Maxwell软件计算了其齿槽转矩和电磁运行转矩。借鉴永磁电机的齿槽转矩抑制方法,采用在磁性盘端面开设矩形槽的方法,研究了不同开槽方案对平衡头电磁转矩即运行平稳性的影响。研究表明,当励磁电流较小时,在齿状磁性盘上开一个或多个一定尺寸的矩形槽时,可一定程度上提高平衡头运行平稳性。
Electromagnetic balancer is a new type of on-line dynamic balancing device appearing and grow- ing nearly ten years. Because the magnetic disc is an internal gear, the balancer obtains the cogging torque between the magnetic disc and the permanent magnet. The inherent cogging torque affects the movement smoothness of electromagnetic balancer. This paper designed a model of electromagnetic balancer and analy- ses its operation principle. Meanwhile, the cogging torque and electromagnetic torque were obtained based on the Ansoft-Maxwell. Referencing the method of reducing the cogging torque of permanent magnet motor, the method of designing rectangular slot in magnetic disk end face was adopted and the effect of the different slotting mode on the electromagnetic torque i.e. the running smoothness of the balancer was studied. Re-＇ search result shows that when the excitation current is small, one or more rectangular slot with a certain size machining in the magnetic disc can effectively improve the operation smoothness of the balancer to a certain extent.
出处
《微电机》
北大核心
2014年第3期29-32,51,共5页
Micromotors
基金
国家自然科学基金项目(51175410)
关键词
电磁平衡头
齿状磁性盘
运行平稳性
辅助槽
齿槽转矩
electromagnetic balancer
toothed magnetic disc
operation smoothness
auxiliary slot
coggingtorque
