The Control of the Position Servo of the Linear Motor
ABSTRACT
Linear motor direct drive feed system cancel all intermediate transport segments．It greatly improve the working accuracy and servo performance of the machine tool，Permanent magnet linear synchronous servo motor used high-energy permanent magnets，has thrust high strength，low loss，electrical time constant small，fast response and so on．As a result，in recent years in high-grade numerical control machine tool to drive in by the application of a new generation CNC machine tools one of the main signs．
In this paper，the research object is the position controller of a permanent magnet linear motor direct servo system．Firstly，it describes linear motor basic structure，sets forth its working principle and related control strategy．According to the performance requirement of the ultra-precision machine feed drive servo system and the characteristic of “direct drive”，the control structure is designed，and the mathematical model of servo motor is established．Then we design the position controller．P-PI position controller and IP position controller are designed by engineering design plan．By comparing, the exoterical analysis and simulation results show that use P-PI position controller can make the output on the trail of the input of the step signal better．
Key words：Servo linear motor Direct drive Position controller
