摘要:随着自动控制技术和计算机的高速发展,高速和超高速加工要求伺服装置具有极高的加、减速度,从而导致了直线交流伺服电动机驱动系统的产生和发展。以交流步进控制思想为理论基础,永磁同步直线电机(PMSLM)为控制对象,提出了动子离散电流定向控制策略,将连续的正弦行波磁场离散为步进磁场。通过控制电机动子电流实现对电磁推力的控制,从而使电机获得了精确的位置控制。仿真与实验结果表明,交流步进控制的PMSLM位置控制系统具有良好的动态特性和定位特性,并且控制简单、实时。
关键词:永磁同步直线电机;交流步进控制;离散电流;步进磁场;位置控制 Abstract: With the rapid development of the automatic control technology and computer, high-speed and ultra-high-speed machining requires the servo device having a very high acceleration and deceleration, resulting in the emergence and development of the linear AC servo motor drive system. Based on AC step control theory and using permanent magnet synchronous linear motor (PMSLM) as the control object, the mover discrete current directional control strategy was proposed. The continuous sine magnetic field was dispersed into step field. The control of the electromagnetic force was achieved by controlling the mover current, and the precise position control can be obtained. Simulation and experimental results demonstrate that the stepper control of PMSLM position control system both has good dynamic characteristics and positioning characteristics. In addition, simple and real-time control can be realized.
Key words: permanent magnet synchronous linear motor; AC step control; discrete current; step field; position control
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