The utility model discloses a combined low cogging force permanent magnet linear motor, the linear motor comprises a primary and a secondary, the primary is composed of a primary core and an armature winding, the armature winding is wound on the primary core teeth, the secondary is composed of at least a group of primary and secondary modules tightly assembled, a single secondary module is composed of a permanent magnet and a secondary yoke plate, and the permanent poles in a single secondary module The number of the primary and secondary modules is the same, and the width of the permanent poles in each secondary module is different. The cogging force of the primary and secondary modules is positive in the first half cycle, negative in the second half cycle, negative in the first half cycle and positive in the second half cycle. The cogging force generated by the primary and secondary modules is highly complementary to the cogging force waveform generated by the secondary modules. The primary and secondary modules and their matching secondary and secondary modules are highly complementary The module is composed of building blocks along the secondary movement direction. The beneficial effect of the utility model is that the total cogging force of the combined motor can be significantly reduced, and the utilization rate of the magnet can not be reduced.
【技术实现步骤摘要】
一种组合式低齿槽力永磁直线电机
本技术属于直线电机领域,更具体地,涉及一种组合式低齿槽力永磁直线电机。
技术介绍
永磁直线电机具有推力密度大、响应速度快、定位精度高等优点,在垂直提升系统、交通运输、精密加工等直线运动场合具有广阔的应用前景。当直线电机被应用在要求大推力的场合时,一般采用多台单元直线电机沿运动方向组合安装,按布置方式可分为单边与双边结构,各单元电机之间积木式拼装组合以形成连续铁心,可认为这种应用场合下电机总的输出推力为各单元电机的输出推力之和。单元直线电机模块化组合后,虽然各单元电机的推力叠加满足了推力需求,但各单元电机的齿槽力也相应叠加,齿槽力的增大会导致推力波动,降低永磁直线电机的控制特性、运行可靠性、控制与定位精度,并引起震动噪声等问题。为了降低齿槽力与推力波动,现有技术提出了多种方法,如斜极法、采用相同材料不等厚度的永磁磁极、磁极削极、磁极轴向分段等。斜极法因简单有效被广泛应用,如图1-3所示,其将直线电机次级上的永磁体在轴向倾斜,从而减小电机的齿槽力,虽然斜极法可以有效抑制齿槽力,但它会造成推 ...
【技术保护点】
1.一种组合式低齿槽力永磁直线电机,其特征在于:所述组合式低齿槽力永磁直线电机由多个单元电机模块拼装组合而成,每个电机单元包括组合式初级和组合式次级,组合式初级由结构相同的初级模块组成并形成连续初级,所述初级模块由初级铁心和电枢绕组组成,电枢绕组绕在初级铁心齿上,组合式次级由具有不同极弧系数的次级模块组成,单个次级模块由永磁体和次级轭板组成,不同次级模块的永磁体宽度不同,厚度相等,通过把具有极弧系数的次级模块组合起来形成主次级模块和副次级模块,主次级模块的齿槽力在前半周期为正值,后半周期为负值,副次级模块的齿槽力在前半周期为负值,后半周期为正值,主、副次级模块的齿槽力波形高 ...
【技术特征摘要】
1.一种组合式低齿槽力永磁直线电机,其特征在于:所述组合式低齿槽力永磁直线电机由多个单元电机模块拼装组合而成,每个电机单元包括组合式初级和组合式次级,组合式初级由结构相同的初级模块组成并形成连续初级,所述初级模块由初级铁心和电枢绕组组成,电枢绕组绕在初级铁心齿上,组合式次级由具有不同极弧系数的次级模块组成,单个次级模块由永磁体和次级轭板组成,不同次级模块的永磁体宽度不同,厚度相等,通过把具有极弧系数的次级模块组合起来形成主次级模块和副次级模块,主次级模块的齿槽力在前半周期为正值,后半周期为负值,副次级模块的齿槽力在前半周期为负值,后半周期为正值,主、副次级模块的齿槽力波形高度互补,主次级模块及与其匹配的副次级模块沿次级运动方向积木式组合。
2.根据权利要求1所述的组合式低齿槽力永磁直线电机,其特征在于:所述组合式低齿槽力永磁直线电机的拓扑结构采用单边结构,设有单边初级,其次级由至少一组主、副次级模块沿电机运动依次紧密排列构成,与初...
【专利技术属性】
技术研发人员:许孝卓,孙震,汪成哲,郝晓茹,许胜军,朱瑞卿,党建军,
申请(专利权)人:河南理工大学,河南东迪电气有限公司,
类型:新型
国别省市:河南;41
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。