数控机床永磁直线电动机磁悬浮运行机制研究

为实现数控机床永磁直线同步电动机的磁悬浮运行,须对电动机的电磁推力和悬浮力进行实时控制。电磁推力和悬浮力的计算是数控机床磁悬浮永磁直线同步电动机设计及控制的基础。根据数控机床永磁直线同步电动机的磁悬浮运行机制,推导出电动机的电磁推力和悬浮力与电流之间关系的数学模型。并用Ansoft对电磁推力和悬浮力进行有限元分析,将解析计算结果与Ansoft的计算结果进行比较,验证了数学模型的有效性与正确性,为数控机床永磁直线同步电动机磁悬浮控制系统的分析与设计提供依据。

Research on Magnetic Levitation Operation Mechanism of Permanent Magnet Linear Motor in CNC Machine Tool

Real-time control to electromagnetic thrust and levitation force is necessary in order to realize magnetic levitation stable operation of the permanent magnet linear motor in CNC machine tool.The calculations of electromagnetic thrust and levitation force are the foundation of magnetic levitation permanent magnet linear synchronous motor design and control.Mathematical models of electromagnetic thrust and magnetic levitation force were derived based on the operating principle of double winding levitation permanent magnet linear synchronous motor in CNC machine tool.Further more,finite element analyses of electromagnetic thrust and levitation force were completed by Ansoft.The comparison between calculation results and simulation results confirms the correctness and effectiveness of the proposed mathematical model,which provides a basis for analysis and design of permanent magnet linear motor magnetic levitation control system in CNC machine tool.