摘要
将矢量控制思想应用于三相混合式步进电动机细分驱动系统设计中,将步进电动机定子电流矢量分解为产生磁场的励磁电流和产生转矩的转矩电流,并根据磁场定向原理分别对励磁电流和转矩电流进行控制,进而实现步进电动机恒转矩、等步距角任意细分驱动。同时,在常规SVPWM(空间矢量脉宽调制)算法的基础上,设计了一种SVPWM简化算法。该算法将电压矢量圆划分为3个区域,减少了算法的计算量,提高了系统的实时性。实验结果表明基于矢量控制的步进电动机细分驱动系统实现了步进电动机任意细分驱动,提高了步进电动机控制精度,增加了步进电动机的应用范围。实验结果也验证了采用SVPWM简化算法设计程序执行速度比常规SVPWM算法更快,具有一定的工程应用价值。
Vector control theory was applied to micro-stepping driving system of stepping motor, the stepping motor＇sstator current vector was decomposed into the magnetizing current and the torque current, and the magnetizing current andthe torque current were controlled according to the principle of field orientation, which allows the system to realize constanttorque, equal stepper angle and arbitrary variable micro-stepping driving. At the same time, a simplified SVPWM （spacevector pulse width modulation） algorithm was proposed on the basis of conventional SVPWM algorithm. The simplifiedSVPWM algorithm divides the voltage vector circle into three areas, which greatly reduces the calculation and improves thereal-time performance of the system. The experimental results verify that the micro-stepping driving system designed withvector control achieves the purposes of constant torque, equal step angle and arbitrary variable micro-stepping driving,which improves the stepping motor＇s control accuracy and stability. The results also show that the simplified SVPWM algo-rithm is more effective than conventional SVPWM algorithm.
出处
《微特电机》
北大核心
2014年第2期56-59,共4页
Small & Special Electrical Machines
