注塑机用永磁同步电动机的齿槽转矩优化

The Cogging Torque Optimization of Permanent-Magnet Synchronous Motor for Injection Molding Machines

为了削弱一款注塑机用永磁同步电动机的齿槽转矩,改善其性能并使其能够平稳运行。基于永磁同步电动机齿槽转矩产生的原理,分析了磁极偏移与齿槽转矩的关系,现通过采用磁极偏移的方法可降低永磁电机的齿槽转矩。以一款注塑机用的48槽8极永磁同步电动机存在较大的齿槽转矩为例,基于Maxwell2D建立其有限元模型,再将磁极偏移角度设为变量,通过扫描分析得到最佳的偏移角度,仿真结果表明,将磁极偏移合适的角度可有效的削弱永磁电机的齿槽转矩。该文在优化注塑机用永磁同步电动机的齿槽转上具有较高的参考价值。

In order to weaken the cogging torque of a permanent-magnet synchronous motor used in injection molding machine,the performance of the motor is improved to make it run smoothly.Based on the principle of generating cogging torque of permanent-magnet synchronous motor,the relationship between the magnetic pole shift and the cogging torque is analyzed.The cogging torque of permanent-magnet motor can be reduced by adopting the method of magnetic pole shift.Taking a 48-slot 8-pole permanent-magnet synchronous motor for injection molding machine having large cogging torque as an example,the finite-element model is established based on Maxwell2D,and then the shift angle of magnetic pole is set as a variable quantity.The best shift angle is obtained by scanning analysis,and the simulation results show that shifting the magnetic pole with a suitable angle can effectively weaken the cogging torque of permanent-magnet motor.This paper has a high reference value to optimize the cogging torque of permanent-magnet synchronous motor for injection molding machine.