高动态特性步进电机驱动器系统设计(英文)

Design of High Dynamic Performance Driver for Stepper Motor

针对步进电机在快速加、减速及制动过程中容易出现的失步、过冲等现象,提出基于混合续流的功率器件优化导通驱动方式,能够最大程度减小在加、减速与制动过程中反电势对步进电机动态特性的影响,同时快速跟随细分电流给定波形。在此优化导通方式的基础上设计了一种具有高动态特性的全数字化步进电机驱动器,解决了步进电机在快速启停与加减速过程中出现的过冲和失步现象。实验结果表明,设计的驱动器具有很高的动态特性,符合设计要求。

Mixed-recirculation driving method for stepper motor is designed, which can minimize the influence of back EMF and keep the coil current follow the subdivided given-current rapidly, especially during the acceleration and deceleration. Based on this method, a high dynamic performance stepper motor driver is designed. This driver can avoid overshooting and stepping-out when stepper motor changes speed frequently or stops abruptly. Finally, the driver is implemented and tested. The test results show that the driver has a really high dynamic performance, which has totally met the design requirements.