磁导调制式永磁直线伺服电机的设计

The Design of Permeance Modulating Permanent Magnet Linear Servo Motor

为了削弱永磁直线伺服电机端部效应引起的推力波动,本文提出了基于磁导调制的永磁直线伺服电机设计方法。电机的初级采用开口槽,利用齿槽磁导与端部磁导相调制,使总磁导波均匀分布在奇数个永磁体磁极内。将磁导调制方法与分数槽绕组理论有机结合应用于永磁直线伺服电机的设计中,电机的初级绕组采用单齿集中成型线圈,具有短距与分布效应,且有工艺性好、绕组端部短、推力密度高的特点,有效地削弱了永磁直线伺服电机端部效应引起的推力波动。文中给出了磁导调制式永磁直线伺服电机设计方法的一般规则,并给出了一个每相2绕组的直线电机算例,样机的分析计算验证了所述方法的正确性。

For reducing the thrust ripple caused by the ending effect of permanent magnet linear servo motor, the paper presents the design method of permanent magnet linear servo motor based on permeance modulating. The primary of the motor uses open slot, both cogging permance and ending permance is modulated, causing the synthesized wave proportionally distributing in odd numbers of permanent magnet pole. The method of permeance modulating is applied in the design of permanent magnet linear servo motor, and conflating the theory of fraction-slot, the windings of the motor use one cog and concentrative taking shape coils, having short distance and distributive effect, also having the characteristic which is well craft, short ending of windings, high density of thrust, which can reduce the thrust ripple caused by the ending effect of permanent magnet linear servo motor effectively. In this paper, general rules of the design of permanent magnet linear servo motor based on the method of permeance modulating is given, and giving the calculating example of linear motor which is two wingdings each phace, the analyzing and calculating of this motor confirms the correctness of this method.