JPH0243523U

JPH0243523U -

Info

Publication number: JPH0243523U
Application number: JP10664588U
Authority: JP
Priority date: 1988-08-11
Filing date: 1988-08-11
Publication date: 1990-03-26
Anticipated expiration: 2003-08-11
Also published as: JPH0534336Y2

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
図はこの考案の一実施例の原理を説明するための
図である。第５図は制御電流と負荷との関係を示
す図である。第６図は制御電流とオフセツトｌと
の関係を示す図である。第７図はこの考案の他の
実施例を示すブロツク図である。第８図はこの考
案が適用される磁気軸受の他の例を示す図である
。第９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はバイアス電流源、２３
，２５，３３，３５，２１３，２１６，２１８は
加算器、２８，３８は偏差増幅器、２９，３９は
ＰＩＤ調節器、２４，２６，３４，３６は電流増
幅器、２７，３７は軸位置基準回路、２１１は微
分器、２１２はゲイン調整回路、５１，６１，７
１，８１は制御コイル、５２，６２はバイアスコ
イル、５３，６３，７３，８３は抵抗を示す。 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 diagram for explaining the principle of an embodiment of this invention. FIG. 5 is a diagram showing the relationship between control current and load. FIG. 6 is a diagram showing the relationship between control current and offset l. FIG. 7 is a block diagram showing another embodiment of this invention. FIG. 8 is a diagram showing another example of a magnetic bearing to which this invention is applied. FIG. 9 is a diagram showing 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 and 12 are rotors, 21 is a bias current source, 23
, 25, 33, 35, 213, 216, 218 are adders, 28, 38 are deviation amplifiers, 29, 39 are PID regulators, 24, 26, 34, 36 are current amplifiers, 27, 37 are axis position reference circuits , 211 is a differentiator, 212 is a gain adjustment circuit, 51, 61, 7
1 and 81 are control coils, 52 and 62 are bias coils, and 53, 63, 73, and 83 are resistors.

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 control device comprising: a bias current for linearizing the attractive force and excitation current of the two electromagnets according to a current flowing through a control coil of the electromagnet; 1. A control device for a magnetic bearing, characterized in that the device controls vibrations in the axial direction of the rotating shaft and provides damping to vibrations in the axial direction of the rotating shaft.