JPH0243522U

JPH0243522U -

Info

Publication number: JPH0243522U
Application number: JP10664488U
Authority: JP
Priority date: 1988-08-11
Filing date: 1988-08-11
Publication date: 1990-03-26

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例のブロツク図であ
る。第２図は回転軸とラジアル磁気軸受との関係
を示す図である。第３図はラジアル磁気軸受に流
れる電流と電磁力との関係を示す図である。第４
図はこの考案の他の実施例を示すブロツク図であ
ある。第５図はこの考案の他の実施例が適用され
る磁気軸受を示す図である。第６図はこの考案の
さらに他の実施例を示すブロツク図である。第７
図は従来の磁気軸受を示す図である。図において、１は回転軸、２，３は位置センサ
、４は速度センサ、５，６，７，８は電磁石、１
１，１２はロータ、２１はバイアス電流指令回路
、２２，３２，４２は反転器、２３，２５，３３
，３５，４３，４４は加算器、２４，２６，３４
，３６は電流増幅器、２７，３７は軸位置基準回
路、２８，３８は偏差増幅器、２９，３９はＰＩ
Ｄ調節器、５１，６１，７１，８１は制御コイル
、５２，６２，７２，８２はバイアスコイルを示
す。 FIG. 1 is a block diagram of one embodiment of this invention. FIG. 2 is a diagram showing the relationship between the rotating shaft and the radial magnetic bearing. FIG. 3 is a diagram showing the relationship between the current flowing through the radial magnetic bearing and the electromagnetic force. Fourth
The figure is a block diagram showing another embodiment of this invention. FIG. 5 is a diagram showing a magnetic bearing to which another embodiment of this invention is applied. FIG. 6 is a block diagram showing still another embodiment of this invention. 7th
The figure shows a conventional magnetic bearing. In the figure, 1 is a rotating shaft, 2 and 3 are position sensors, 4 is a speed sensor, 5, 6, 7, and 8 are electromagnets, 1
1, 12 are rotors, 21 is a bias current command circuit, 22, 32, 42 are inverters, 23, 25, 33
, 35, 43, 44 are adders, 24, 26, 34
, 36 are current amplifiers, 27, 37 are shaft position reference circuits, 28, 38 are deviation amplifiers, 29, 39 are PI
In the D adjuster, 51, 61, 71, 81 are control coils, and 52, 62, 72, 82 are bias coils.

Claims

[Claims for Utility Model Registration] Two rotors are arranged such that two rotors have rotating shafts spaced apart from each other in the axial direction, and each has a predetermined offset in the axial direction with respect to the two rotors. A control device for a magnetic bearing, comprising two electromagnets, the two electromagnets depending on the position or speed of the rotating shaft.
A control device for a magnetic bearing, characterized in that the bias current for linearizing the attractive force and excitation current of the electromagnets is controlled, and vibrations in the axial direction of the rotating shaft are damped. .