The invention provides a rotor structure of a hybrid stepping motor, which consists of a shaft, a sleeve, a yoke and permanent magnet sheets with several poles; the permanent magnet sheet is magnetized along the radial direction; along the circumference of the axis, the permanent magnet sheet is arranged alternately with N-pole facing outward and S-pole facing outward; the width of the permanent magnet sheet is consistent with the width of the small teeth of the stator of the stepping motor; the permanent magnet sheet is bonded to the magnetic yoke throughout the circumference to realize that the rotor The structure of the heart. The rotor structure adopted in the invention makes the magnetic circuit at the end of the rotor generate a self-loop, which greatly reduces the axial residual magnetic moment of the motor; the rotor structure is a whole core structure, which does not need to shift half the pitch of the teeth, and can effectively avoid reducing the output torque caused by the error of the misalignment angle of the multi-segment core; the utilization ratio of the effective working section of the rotor structure reaches 100%, and is directly connected with the permanent magnet sheet. The effect of stator teeth greatly improves the output torque, holding torque, self-positioning torque and other performance indicators of hybrid stepping motor.
【技术实现步骤摘要】
一种混合式步进电机转子结构
本专利技术涉及电机
,具体为一种新型的混合式步进电机转子结构。
技术介绍
随着混合式步进电机在一些高
的应用,如卫星、潜艇等驱动机构模块中,磁敏感剩磁矩指标成为了一项关键指标,而传统的混合式步进电机采用转子永磁体轴向充磁,造成了轴向剩磁矩极大的现象。传统的步进电机转子结构和磁路如图1~图4所示。此外,由于部分应用环境对电机体积的限制,所以对电机的功率密度提出了较高的要求,传统的混合式步进电机转子有效工作段利用率只有60%左右,极大制约了混合式步进电机的输出转矩、保持转矩、自定位转矩等性能指标的提高。
技术实现思路
为解决现有技术存在的问题,本专利技术提出一种混合式步进电机转子结构,其目的是控制混合式步进电机的轴向剩磁矩,并提高电机的整体性能。本专利技术的技术方案为:所述一种混合式步进电机转子结构,其特征在于:由轴、轴套、磁轭、若干极的永磁片组成;所述永磁片沿径向充磁;沿轴的周向,永磁片采用N极朝外与S极朝外相交替布置;所述永磁片的宽度与步进电机的定子小齿宽度一致;永磁片整周粘接在磁轭,实现转子为整段铁心的结构。有益效果(1)本专利技术所采用的转子结构,使转子端部磁路产生自回路,大大降低了电机轴向剩磁矩,磁路如图8和图9所示。(2)该转子结构为整段铁心的结构,不需要错移半个齿距(磁片距),可以有效的避免因多段铁心错移角度误差而造成的输出转矩降低。(3)该转子结构有效工作段利用率达到100%,并且由永磁体片直接与电机定子齿作用,极大提高了混合式步进电机的输出转矩、保持转矩、自定位转矩等性能指标。(4)新型转子磁钢完全覆盖,可 ...
【技术保护点】
1.一种混合式步进电机转子结构,其特征在于:由轴、轴套、磁轭、若干极的永磁片组成;所述永磁片沿径向充磁;沿轴的周向,永磁片采用N极朝外与S极朝外相交替布置;所述永磁片的宽度与步进电机的定子小齿宽度一致;永磁片整周粘接在磁轭,实现转子为整段铁心的结构。
【技术特征摘要】
1.一种混合式步进电机转子结构,其特征在于:由轴、轴套、磁轭、若干极的永磁片组成;所述永磁片沿径向充磁;沿轴的周向,永磁片采...
【专利技术属性】
技术研发人员:邓南,南悦,权艳娜,李敏哲,尹海涛,郭炳岐,杨凡,曹莎,
申请(专利权)人:西安航天动力测控技术研究所,
类型:发明
国别省市:陕西,61
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