一种步进电机PWM恒流驱动技术的研究  

Research on a constant-current drive in step motor by PWM

作　　者：蒋存波[1] 张玉[1] 陈小琴[1] 金红[1] 

机构地区：[1]桂林工学院电子与计算机系,广西桂林541004

出　　处：《桂林工学院学报》2003年第4期360-364,共5页Journal of Guilin University of Technology

基　　金：广西区科技攻关项目(桂科攻0235009-5)

摘　　要：介绍了利用PWM技术对步进电机进行恒流驱动的原理和一种具体的实现电路,以及驱动器功耗的估算公式;给出了一种可靠且简便的电机绕组电流检测方法.利用该技术设计的步进电机驱动器与传统的电阻限流和线性恒流驱动方式相比,可以显著提高电机绕组的电流上升率和步进电机的运行性能,降低驱动器的发热,提高效率,减少驱动器的体积.经实测,该驱动器显著提高了电源电压适用范围和电机运行的稳定性.The operation of step motor is decided by drive. How to use the PWM technology in driving step motor by a constant current is described with the estimating formula of power loss.A reliable and convenient method to test current of winding is provided. Compared with traditional restrict current by resistance and constant-current drive of linearity, the drive of step motor used by PWM can increase the rising rate of winding current and the operation step motor, cut down the heat with improved efficiency and reduced volume.In addition, the drive increases the scope of power and stabilization of motor.

关 键 词：步进电机 PWM 单片机 

分 类 号：TM301.2[电气工程—电机]