DIGITAL-CONTROL OF ACTIVE MAGNETIC BEARINGS

被引：36

作者：

WILLIAMS, RD

KEITH, FJ

ALLAIRE, PE

机构：

[1] Department of Electrical Engineering, University of Virginia, Charlottesville

[2] Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 1990年 / 37卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1109/41.45839

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Theoretical relationships are developed to relate the characteristics of a controller transfer function to the stiffness and damping properties of an active magnetic bearing. Both proportional and derivative feedback are shown to be necessary for closed-loop system stability, and for the ideal case, bearing stiffness and damping properties are shown to be simple linear functions of the proportional and derivative feedback gain constants, respectively. The flexibility of a digitally controlled magnetic bearing is demonstrated by the implementation of algorithms, which include second-derivative and integral feedback. Second-derivative feedback is shown to be effective at extending the usable bandwidth of the digital controller, and integral feedback rejects rotor position error in the presence of static loads. The relationship between controller sampling rate and bearing performance is investigated, and it is shown that increased sampling rate and increased amounts of second-derivative feedback have similar effects on the bearing properties. © 1990 IEEE

引用

页码：19 / 27

页数：9

共 20 条

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