本文对长春非金属材料试验机厂现生产的电子万能实验机影响产品质量的可控硅调速系统的低速不稳定,静差度及调速范围等问题,通过测试、理论分析和计算,找出了原因,并结合实际情况进行了改进设计。实验结果证明,这一改进,基本解决了低速稳定性、静差度、调速范围等问题,产品质量有了很大提高。改进线路已经通过评审,工厂正进行改进后的试生产。 In this paper, Changchun non-metallic materials testing machine factory is now produced electronic universal testing machine product quality impact of the SCR speed low instability, static variability and speed range and other issues, through testing, theoretical analysis and calculation, find Out of the reasons, combined with the actual situation to improve the design. The experimental results show that this improvement basically solves the problems of low speed stability, static tolerance, speed range and other issues, product quality has been greatly improved. Improved lines have passed the assessment, the factory is undergoing improved trial production.