摘要
为了提高行波型旋转超声电机速度稳定性,分析现有双轴承支撑情况下,加工和装配误差对速度稳定性的影响,认为沿圆周压力不均衡是造成速度波动的主要原因之一。提出了单轴承支撑附加调心结构的方案,使接触界面实现压力自平衡。理论和实验分析表明,这种方案使接触界面的压力分布更加均匀,速度稳定性更好。实验结果表明,与原结构对比,在超声电机输出力矩、速度范围等主要性能指标基本一致的情况下,超声电机的空载速度波动率降低了约40.0%,波动范围达到2.0%以内。
Aim at improving the velocity fluctuation ratio of traveling wave type rotary ultrasonic motor（TRUM）,this paper analyzes the impact of matching or assembly error in the present case of duplex bearing structure.The results show that one of the main reasons for velocity fluctuation of TRUM is pressure imbalance along the circumference.A scheme to realize pressure auto-balance with single bearing and self-aligning structure was proposed.Theoretical and experimental analysis shows that the approach makes the contact interface more uniform pressure distribution,and speed stability better.Comparing with the original structure,the main key performance indicators,such as output torque and velocity range,are basically the same,and the experimental result indicates that the no-load velocity fluctuation ratio decreased 40.0%,and velocity fluctuation range reaches within ？2.0%.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第30期109-116,共8页
Proceedings of the CSEE
基金
国家自然科学基金-广东联合基金(U0934004)
国家自然科学基金项目(10874090)~~
关键词
超声电机
接触界面
速度波动率
调心结构
ultrasonic motor（USM）
contact interface
velocity fluctuation ratio
self-aligning structure
