关键词: 混合式步进电动机, 微步驱动, 电流衰减, 步进速率控制

Abstract: The hybrid stepper motors using microstepping drive technology can achieve smaller step angle, more smooth performance during rotation, and improve the dynamic response speed and the control precision and stability of the system. The drive circuit system of microstepping needs to solve the key problems of high subdivision sine and cosine current control, current decay control and step rate control, the chip with different function integration brings different drive performance and tuning difficulty to the design of microstepping drive system.The analysis and research of the stepper motor's microstepping principle, the main function module of the drive system, the typical technology implementation scheme and the fuller function integrated chip provides a reference for the development of microstepping drive system with higher performance and economy.

Key words: hybrid stepper motor, microstepping drive, current decay, step rate control