抑制混合式步进电动机系统振荡的新方法

New Method for Restraining Hunting Problem of Hybrid Stepping Motor System

结合近代电流型驱动的二相混合式步进电动机系统的实际，分析了典型振动特性的特点。用次谐波振荡的理论分析了处产生较明显振荡的机理，提出了改善的措施及进一步改进的方向，提出用变参考电流幅值控制来抑制高频不稳定性的方法，理论分析和实验表明该方法效果明显。

This paper analyzed thetraits of the typical vibration characteristics, with regard tothe practice of the modern current-mode driving 2-phase hybrid stepping motor systems. The mecha-nism of the obvious vibration at the frequency of fcp = n1 fo has been analyzed by subharnionic theory.The method and the way for further improving the vibration characteristics have been proposed. Amethod of changingthe reference current amplitude to restrain the vibration in the high-frequency re-gion has also been put forward. Its effectiveness is verified theoretically and experimentally.Keywoeds: Hybrid stepping motors Vibration characteristics SubharmonicHigh-frequency instability