被动式电磁阻尼器的原理和实验研究  

Study on a new type of passive electromagnetic damper

作　　者：郑水英[1] 马振飞[1] 

机构地区：[1]浙江大学化工机械研究所,浙江杭州310027

出　　处：《振动工程学报》2005年第1期75-78,共4页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目 (5 0 375 14 0)

摘　　要：为了简单可靠地增加系统的稳定性、抑制转子的共振峰值 ,提出了一种新型的被动式电磁阻尼器 ,它的结构类似于电磁轴承 ,但无需闭环控制 ,采用直流电工作。通过分析发现 ,电磁阻尼器线圈内由于转子涡动时变化的磁场而产生的波动电流与转子位移间的相位差是产生阻尼的原因 ,推导了波动电流、阻尼系数的计算公式。To simply and reliably improve the rotor stability and suppress the resonant vibration, a new passive electromagnetic damper is proposed. Its configuration is similar to that of electromagnetic bearing. The damper works with DC so that senor and closed loop control are not needed. The air gap between rotor and stator is changed when rotor whirls, As a result, the electromagnetic field intensity is changed accordingly and fluctuating current in the damper coil is generated. Damping force is produced because of the phase difference between fluctuating current and displacement of rotor. The formulas of fluctuating current and damping coefficient are deduced theoretically. The experimental results indicate that resonant vibration around the first critical speed is obviously suppressed by using this type of damper.

关 键 词：实验研究 抑制 共振峰 直流电 原因 实验结果 发现 类似 推导 波动 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程] O122.3[理学—数学]