基于单片机的通用型五相混合式步进电机驱动器设计

分析了电脑绣花机系统中，现有的五相混合式步进电机驱动器存在低频转矩振荡、高频输出转矩不足和多电源供电及不通用等诸多不足之处的基础上，设计出一种基于单片机的通用型五相混合式步进电机驱动器。该驱动器使用单一电源供电，驱动五相电机时采用三相励磁PWM输出方式，改善了驱动的矩频特性；同时，此驱动器在不脉冲细分的情形下，可以驱动二、三、四相步进电机。此设计在电脑绣花机系统中投入应用，并取得良好的效果。

Design of Five-Phase Hybrid General-Purpose Stepping Motor Driver Based on MCU

Base on the analysis of the defects of present five-phase hybrid stepping motor drivers in computerised embroidery machine such as low frequency torque vibrations, high frequency inadequate torque output, multi power supplies and out of general-purpose, this paper designs a general-purpose stepping motor driver based on MCU. The new driver uses single power supply and three-phase excitation and gives PWM output. The design improves the stability in low frequency and the torque-frequency characteristic in high frequency. Even under the condition without impulse-subdivision, it can excite the motor of 2,3,4 phases. It has been applied in the computerised embroidery machine and has achieved a real good effect.