液压与气动2026，Vol.50Issue(5)：27-36,10.DOI:10.11832/j.issn.1000-4858.2026.05.004
步进电机直驱滑阀工作点保持力矩试验方法研究
Research on Experimental Method for Determining Operating-point Holding Torque of a Stepper-motor Direct-drive Slide Valve
摘要
Abstract
During the transition of a stepper motor direct-drive slide valve from zero to maximum opening,the electromagnetic torque of the stepper motor is required to reliably balance the holding torque at each operating point of the slide.Under constant-current control,the electromagnetic torque of the stepper motor decreases with increasing temperature,and dead zones and saturation regions exist in the relationship between electromagnetic torque and motor current.These factors prevent accurate matching between electromagnetic torque and the holding torque at slide operating points.To address this problem,based on the current-electromagnetic torque characteristics of the stepper motor and slide mechanical theory,the torque constant is identified as the key parameter affecting the torque balance.An experimental scheme for torque constant identification is designed.Linear regression is applied to fit the current-electromagnetic torque characteristic curve.The torque constant Kt is identified as 0.413±0.01 N·m/A,and the linear current range is 0.4～2.3 A.Static torque thresholds at spool operating points are tested to ensure reliable valve operation under hydraulic force limits.Finally,a current-displacement matching method based on holding torque parameters within the linear torque range is proposed.Experimental results show that,compared with conventional constant-current control,the proposed method achieves lower motor energy consumption.关键词
步进电机/直驱阀/保持力矩/力矩常数/线性回归Key words
stepper motor/direct-drive valve/holding torque/torque constant/linear regression分类
机械制造引用本文复制引用
魏列江,李仟祥,刘增光,强彦,李娜娜..步进电机直驱滑阀工作点保持力矩试验方法研究[J].液压与气动,2026,50(5):27-36,10.基金项目
国家重点研发计划(2022YFB3403003) （2022YFB3403003）
