提出一种等步距角的细分控制方法, 并据此设计了恒频脉宽调制细分电路。试验表明, 文中探讨的细分方法和驱动系统具有精度高、低频运行平滑稳定等优点。关键词: 步进电机; 等步细分; 恒频脉宽调制; 驱动电路Abstr act: The paper mainly put forward a new control method of stepping motor which character - , ized by equal -stepped fine division, and then design a constant frequency PWM driver circuit. The experimenting result indicates thatthe new control method have many advantages such as high precision and stable and smooth quality on low frequencyoperating.Key words: stepping motor; equal- stepped fine division; constant frequency PWM; driver circuit