动压气体轴承直流永磁电机可靠性分析  

Reliability analysis on DC permanent magnet motor with dynamic pressure gas bearing

作　　者：杨凤英[1] 王智奇[1] 王鹏飞[2] 陈金来[1] 郭德青[1] 

机构地区：[1]天津航海仪器研究所,天津300131 [2]海军驻沪东中华造船(集团)有限公司军事代表室,上海200219

出　　处：《中国惯性技术学报》2013年第3期402-405,410,共5页Journal of Chinese Inertial Technology

基　　金："十二五"国防科技重点预研项目(51309050102)

摘　　要：动压气体轴承无刷直流永磁电机应用于高精度液浮陀螺仪中,永磁电机的优越性在陀螺仪的性能方面得到了充分体现,但是动压气体轴承直流永磁电机在应用过程中也表现出了可靠性方面的一些问题,如:轴承容易被污染、启动可靠性差等等。电机的可靠性不仅影响陀螺仪的可靠性,而且还影响系统的可靠性,因此电机的可靠性问题必须解决。从理论上分析:影响电机可靠性的原因不仅包括电机及轴承的结构特点,而且还包括控制电路的因素。根据理论分析结果对电机的整体结构和控制电路进行了改进设计,实践证明:改进后轴承内的污染物明显减少、电机的启动可靠性明显提高。Brushless DC permanent magnet motor with dynamic pressure gas bearing has successfully applied in high-precision liquid floating gyroscope and improve its precision, but the application show that its reliability is unsatisfactory, e.g., the bearings are easily contaminated, and the start reliability is poor. In this paper, theoretical analyses are made to solve these problems, which show that the causes affecting the reliability of the motor not only include the structural characteristics of motor and bearing, but also include the factors of control circuit. Based on the analysis results, an improved design for the motor’s overall structure and control circuit is given. Practical application shows that the improved design can significantly reduce the bearing pollution and increase the reliability of motor starting.

关 键 词：动压气体轴承 直流永磁电机 轴承卡死 轴承被污染 轴承磨损 启动失效 

分 类 号：U666.1[交通运输工程—船舶及航道工程]