JPS58114917U

JPS58114917U - magnetic bearing device

Info

Publication number: JPS58114917U
Application number: JP1017482U
Authority: JP
Inventors: 野田　耕介; 妻木　伸夫
Original assignee: 株式会社日立製作所
Priority date: 1982-01-29
Filing date: 1982-01-29
Publication date: 1983-08-05

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の制御形磁気軸受装置の縦断面図、　　　
　゛第２図は軸受ギャップＸに対する吸引力Ｆの関係、
第３図はさらにループゲインＫによる軸受ギャップＸと
吸引力Ｆとの変化を表わす特性図、第４図は本考案の一
実施例であるスラスト方向制御形磁気軸受装置の縦断面
図、第５図はラジアル方向に実施した例の部分断面図で
ある。　　−１、・・・回転体、２・・・制御形スラス
ト磁気軸受、２１・・・補助スラスト軸受、２２・・・
一定励磁”用コイル、２３・・・制御用コイル、２５・
・・位置可変補助スラスト軸受、３・・・受動形ラジア
ル磁気軸受、３１・・・補助ラジアル軸受、３５・・・
位置可変補助ラジアル軸受、４・・・位置検出器、５・
・・位相補償回路、６・・・増幅器、７・・・電力増幅
器、７１・・・反転回路、８・・・一定励磁用電源、９
・・・回転数検出器、１０・・・Ｆ／Ｖコンバータ、１
１・・・ループゲイン制御回路、１２・・・補助軸受制
御回路、１３・・・補助軸受駆動回路。　　　　　　　
　　、・ ′ｆＪｚ−図Ｆ　　　゛ ↑ 一′　−馬３図Ｆ　　　　　　　　　　　− ↑ 第５目 ’１ｆｓ４　　図　　−Figure 1 is a longitudinal cross-sectional view of a conventional controlled magnetic bearing device.
゛Figure 2 shows the relationship between the suction force F and the bearing gap X.
FIG. 3 is a characteristic diagram showing changes in bearing gap X and attraction force F due to loop gain K, FIG. The figure is a partial sectional view of an example implemented in the radial direction. -1... Rotating body, 2... Controlled thrust magnetic bearing, 21... Auxiliary thrust bearing, 22...
"Constant excitation" coil, 23... Control coil, 25.
...Variable position auxiliary thrust bearing, 3...Passive radial magnetic bearing, 31...Auxiliary radial bearing, 35...
Position variable auxiliary radial bearing, 4... position detector, 5...
... Phase compensation circuit, 6 ... Amplifier, 7 ... Power amplifier, 71 ... Inversion circuit, 8 ... Constant excitation power supply, 9
... Rotation speed detector, 10 ... F/V converter, 1
1... Loop gain control circuit, 12... Auxiliary bearing control circuit, 13... Auxiliary bearing drive circuit.
,・'fJz-Figure F ゛↑ 1' - Horse 3 Figure F - ↑ 5th eye '1fs4 Figure -

Claims

[Claims for Utility Model Registration] 1. A bearing magnet that magnetically supports a rotating body in a completely non-contact manner and is controlled in at least one direction, a control circuit that controls this, and a sensor that detects the position of the rotating body. , in a controlled magnetic bearing device comprising an auxiliary bearing provided to support a rotating body when the controlled magnetic bearing is not operating or abnormal, or when the rotating body is excessively vibrated, the position of the auxiliary bearing is 1. A magnetic bearing device characterized in that a drive mechanism is provided which makes the change of the loop gain variable, and the drive mechanism is connected to a control circuit so as to be driven based on a signal accompanying a change in the loop gain of the control circuit. 2. The magnetic bearing device according to claim 1, wherein the pusher for making the position of the auxiliary bearing variable is an electric servo motor. 3. The magnetic bearing device according to claim 1, wherein the drive mechanism that changes the position of the auxiliary bearing is a hydraulic actuator. 4. The magnetic bearing device according to claim 1, wherein the drive mechanism for varying the position of the auxiliary bearing is an electric actuator.
□ '5 The magnetic bearing device according to claim 1, wherein the drive mechanism for varying the position of the auxiliary bearing is an air cylinder. −