基于ARM处理器的细分步进电机驱动器设计

Design of Subdivided Stepper Motor Driver Based on ARM Processor

基于ARM处理器MM32SPIN0280设计一款细分步进电机驱动器。主要特点包括外置MOS管驱动器、半桥驱动电路和电流采集电路,实现电流环控制电机。详细分析步进电机衰减模式、电流采样时刻和恒定力矩矢量控制方法。对自举电路和驱动电阻进行功能阐述和定量计算,为实际电路设计提供理论依据。针对软件讨论PWM输出和采样时刻设计,以及恒定力矩矢量控制的实现方法。通过实际电机线圈电流测量,展示了高细分驱动对恒定力矩和小电流波动的优势。通过对比16和2细分情况下的电流波形,证明高细分运行时电机扭矩更稳定,噪音更小。本设计为小型化、高性能步进电机驱动器的开发提供了有价值的参考。

A subdivision stepper motor driver is designed based on ARM processor MM32SPIN0280.The main features include external MOS transistor driver,half-bridge driving circuit and current acquisi-tion circuit,which realizes current loop control of motor.The attenuation mode,current sampling time and constant torque vector control method of stepper motor are analyzed in detail.The functions of bootstrap circuit and driving resistor are expounded and quantitatively calculated,which provides theoretical basis for practical circuit design.The design of PWM output and sampling time and the realization method of constant torque vector control are discussed for software.Through the actual motor coil current measure-ment,the advantages of high subdivision drive for constant torque and small current fluctuation are demon-strated.By comparing the current waveforms in the case of 16 and 2 subdivisions,it is proved that the motor torque is more stable and the noise is less when running in high subdivision.The design provides a valuable reference for the development of miniaturized and high-performance stepper motor drivers.