JPH0314936Y2 - - Google Patents
Info
- Publication number
- JPH0314936Y2 JPH0314936Y2 JP118286U JP118286U JPH0314936Y2 JP H0314936 Y2 JPH0314936 Y2 JP H0314936Y2 JP 118286 U JP118286 U JP 118286U JP 118286 U JP118286 U JP 118286U JP H0314936 Y2 JPH0314936 Y2 JP H0314936Y2
- Authority
- JP
- Japan
- Prior art keywords
- stator core
- radial bearing
- coil ends
- rotating shaft
- wound around
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、吸引制御形磁気軸受によつて高速回
転可能に非接触支持される回転電機に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating electrical machine that is supported in a non-contact manner so as to be able to rotate at high speed by an attraction-controlled magnetic bearing.
工作機主軸やターボ分子ポンプなどのように、
より高い回転数が求められる電気機械では、高速
化を図るための一手段として、ころがり軸受やす
べり軸受に代つて非接触支持される空気軸受や磁
気軸受が用いられるようになつてきた。
Like machine tool spindles and turbomolecular pumps,
In electric machines that require higher rotational speeds, non-contact supported air bearings and magnetic bearings have come to be used instead of rolling bearings and sliding bearings as a means of increasing speed.
磁気軸受の場合に、高剛性を得るため磁気吸引
力を利用した吸引制御形磁気軸受が用いられてい
るが、回転軸を支持するには回転軸まわりの回転
を除く全ての自由度を拘束せねばならず、主に５
軸制御の磁気軸受が用いられている。 In the case of magnetic bearings, attraction-controlled magnetic bearings that utilize magnetic attraction force are used to obtain high rigidity, but in order to support the rotating shaft, all degrees of freedom except rotation around the rotating shaft must be restrained. Must be, mainly 5
Axis-controlled magnetic bearings are used.
その従来例の断面で表わした側面図を第２図に
示す。 A cross-sectional side view of the conventional example is shown in FIG.
１は負荷を駆動する回転軸、２は機枠をなすフ
レーム、３はトルクを発生するモータ部で３１は
ステータコア（３３はこのステータコアに巻回し
た巻線のコイルエンド）、３２はロータコアであ
る。 1 is a rotating shaft that drives a load, 2 is a frame forming a machine frame, 3 is a motor section that generates torque, 31 is a stator core (33 is a coil end of a winding wound around this stator core), and 32 is a rotor core. .
４１は左側に配設された磁気軸受を形成するラ
ジアル軸受部で４１１のステータコアに巻回した
巻線（４１３はそのコイルエンド）を励磁してロ
ータコア４１２の間に生起する電磁力により浮上
し回転自在に回転軸１を支承し、５１は変位セン
サで５１１のステータコアに巻回した検出巻線
（５１３はコイルエンド）によりステータコアの
先端とロータコア５１２との位置変位を検出する
手段である。 41 is a radial bearing part that forms a magnetic bearing disposed on the left side, which excites the winding (413 is the coil end) wound around the stator core of 411, and floats and rotates due to the electromagnetic force generated between the rotor cores 412. It freely supports the rotating shaft 1, and 51 is a displacement sensor that detects the positional displacement between the tip of the stator core and the rotor core 512 using a detection winding (513 is a coil end) wound around the stator core 511.
同様に、４２は右側に配設されたラジアル軸受
部で４２１はステータコア（４２３はコイルエン
ド）、４２２はロータコア、５２は変位センサで
５２１はステータコア（５２３はコイルエンド）、
２２はロータコアである。 Similarly, 42 is a radial bearing part arranged on the right side, 421 is a stator core (423 is a coil end), 422 is a rotor core, 52 is a displacement sensor, 521 is a stator core (523 is a coil end),
22 is a rotor core.
６１〜６６は非磁性体たとえばアルミニウムあ
るいはジユラルミン等からなるリング状のスペー
サである。 61 to 66 are ring-shaped spacers made of a non-magnetic material such as aluminum or duralumin.
すなわち、中央部にモータ３、その両側にラジ
アル軸受４１，４２、その外側にラジアル軸受用
の変位センサ５１，５２を配置している。 That is, the motor 3 is placed in the center, radial bearings 41 and 42 are placed on both sides of the motor 3, and displacement sensors 51 and 52 for the radial bearings are placed outside of the motor 3.
このような配置において、モータ部３、ラジア
ル軸受部４１，４２および変位センサ５１，５２
のステータコアに巻回された巻線は、それらのコ
イルエンド３３，４１３，４２３，５１３，５２
３がステータコアから回転軸１方向に突き出して
いるので、全長が長くなるという欠点があつた。
In such an arrangement, the motor section 3, the radial bearing sections 41, 42, and the displacement sensors 51, 52
The windings wound around the stator core are the coil ends 33, 413, 423, 513, 52.
3 protrudes from the stator core in one direction of the rotating shaft, which has the disadvantage of increasing the overall length.
これは、従前のころがり軸受を用いるものに比
べると、大幅な全長の増加となつていた。 This was a significant increase in overall length compared to conventional roller bearings.
このように全長が長くなると、回転軸１も必然
的に長くなつている。 As the overall length increases in this way, the rotating shaft 1 also inevitably becomes longer.
従つて、回転軸の固有振動数も大幅に低減して
いる。その低減の場合は、概ね長さの２乗に反比
例している。 Therefore, the natural frequency of the rotating shaft is also significantly reduced. The reduction is approximately inversely proportional to the square of the length.
磁気軸受４１，４２を用いるのは、非接触支持
させて回転摩擦を減らし、高速化を可能ならしめ
るためであるが、このように回転軸１の固有振動
数の低下に従つて危険速度が低下するので、磁気
軸受４１，４２を用いた効果が充分に発揮されな
くなるという問題があつた。 The reason why the magnetic bearings 41 and 42 are used is to provide non-contact support to reduce rotational friction and enable higher speeds; however, as the natural frequency of the rotating shaft 1 decreases, the critical speed decreases. Therefore, there was a problem that the effect of using the magnetic bearings 41 and 42 could not be sufficiently exhibited.
本考案は、モータ部３、ラジアル軸受部４１，
４２および変位センサ５１，５２のステータ側に
巻回した巻線の直径を少なくとも１つは他と異な
るようにし、互いのコイルエンドが直径方向に重
なるように、回転軸１方向に接近させて配置す
る。
The present invention includes a motor section 3, a radial bearing section 41,
At least one of the windings wound on the stator side of 42 and the displacement sensors 51, 52 has a diameter different from the other, and is arranged close to each other in one direction of the rotation axis so that the coil ends overlap in the diametrical direction. do.
こうすることにより、ステータコアの巻線のス
ペースフアクターを犠牲にしても、全長を短くす
ることができるので、回転軸１の長さを短くして
固有振動数を引上げ危険速度を高めることができ
る。
By doing this, the overall length can be shortened even if the space factor of the stator core winding is sacrificed, so the length of the rotating shaft 1 can be shortened, the natural frequency can be raised, and the critical speed can be increased. .
本考案の一実施例における断面で表わした側面
図を第１図に示す。
A cross-sectional side view of one embodiment of the present invention is shown in FIG.
すべての図面において、同一符号は同一もしく
は相当部分を表わす。 In all drawings, the same reference numerals represent the same or corresponding parts.
モータ部３と変位センサ５１，５２の各ステー
タコア３１と５１１，５２１に巻回した巻線はお
よそ同じ内周直径であるが、コイルエンド３３，
５１３，５２３の外周直径はラジアル軸受部４
１，４２のコイルエンド４１３，４２３の内周側
直径より小さくなつている。これらを軸１方向に
互いに接近させて配置して、モータ部３のコイル
エンド３３の外側にラジアル軸受部４１，４２の
コイルエンド４１３，４２３が重なり合うように
し、またラジアル軸受部４１，４２のコイルエン
ド４１３，４２３のもう一方の内側に変位センサ
５１，５２のコイルエンド５１３，５２３が重な
り合うようにしている。 The windings wound around the stator cores 31, 511, 521 of the motor section 3 and displacement sensors 51, 52 have approximately the same inner diameter, but the coil ends 33,
The outer diameter of 513 and 523 is the radial bearing part 4.
It is smaller than the inner diameter of the coil ends 413, 423 of Nos. 1 and 42. These are arranged close to each other in the axis 1 direction so that the coil ends 413, 423 of the radial bearing parts 41, 42 overlap on the outside of the coil end 33 of the motor part 3, and the coil ends 413, 423 of the radial bearing parts 41, 42 overlap. The coil ends 513, 523 of the displacement sensors 51, 52 are overlapped on the other inside of the ends 413, 423.
こうすることにより、コイルエンドの重なつた
分だけ全長を短くすることができるのである。 By doing this, the overall length can be shortened by the amount of overlap between the coil ends.
従つて、フレームの外径が多少大きくなるもの
の、全長とともに回転軸の長さが短くなり、固有
振動数すなわち危険速度の増加が可能になる。 Therefore, although the outer diameter of the frame becomes somewhat larger, the overall length and the length of the rotating shaft become shorter, making it possible to increase the natural frequency, that is, the critical speed.
本考案の他の実施例として次の手段が考えられ
る。 The following means can be considered as other embodiments of the present invention.
さきの一実施例では、モータ３のコイルエンド
３３の外側に軸受のコイルエンド４１３，４２３
をもつてき、軸受４１，４２のもう一方のコイル
エンド４１３，４２３の内側に変位センサ５１，
５２のコイルエンド５１３，５２３を配置した
が、コイルエンドが互いに直径方向に重なれば、
内と外の関係は任意である。 In the previous embodiment, the coil ends 413 and 423 of the bearing are placed outside the coil end 33 of the motor 3.
The displacement sensor 51 is placed inside the other coil end 413, 423 of the bearing 41, 42.
Although 52 coil ends 513 and 523 are arranged, if the coil ends overlap each other in the diametrical direction,
The relationship between inside and outside is arbitrary.
かくして本考案によれば、磁気浮上回転電機の
回転軸の長さを短くすることができ、おおむね回
転軸の長さの２乗に反比例する回転軸の曲げの１
次の固有振動数を引き上げることができ、つまり
危険速度をひき上げることができ、高速回転を可
能にし、当該分野に寄与するところ多い。
Thus, according to the present invention, the length of the rotating shaft of a magnetically levitated rotating electrical machine can be shortened, and the bending of the rotating shaft, which is approximately inversely proportional to the square of the length of the rotating shaft, can be reduced by 1.
The next natural frequency can be raised, that is, the critical speed can be raised, and high-speed rotation is possible, making many contributions to this field.
第１図は本考案の一実施例の側断面図、第２図
は従来例の説明図である。
１……回転軸、２……フレーム、３……モータ
部、４１，４２……ラジアル軸受部、５１，５２
……変位センサ、３１，４１１，４２１，５１
１，５２１……ステータコア、３２，４１２，４
２２，５１２，５２２……ロータコア、３３，４
１３，４２３，５１３，５２３……コイルエン
ド、６１〜６６……スペーサ。
FIG. 1 is a side sectional view of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional example. 1... Rotating shaft, 2... Frame, 3... Motor section, 41, 42... Radial bearing section, 51, 52
...Displacement sensor, 31,411,421,51
1,521...Stator core, 32,412,4
22,512,522...Rotor core, 33,4
13,423,513,523...Coil end, 61-66...Spacer.
Claims (1)
れる回転電機において、 モータ部とラジアル軸受部と変位センサのいず
れかのステータコアに巻回した巻線のコイルエン
ドの内周側直径が、他のいずれかのステータコア
に巻回した巻線のコイルエンドの外周直径よりも
大きく、 かつ、この２つの巻線のコイルエンドが直径方
向に重なるよう該２つのステータコアを軸方向に
互いに重なり合うように接近させて配置する ことを特徴とする磁気浮上回転電機。[Scope of Claim for Utility Model Registration] In a rotating electric machine that is non-contact supported by a suction control type radial bearing, the coil ends of the windings wound around the stator core of the motor part, the radial bearing part, and the displacement sensor. The two stator cores are arranged in the axial direction so that the circumferential diameter is larger than the outer circumferential diameter of the coil end of the winding wound around any other stator core, and the coil ends of these two windings overlap in the diametrical direction. A magnetically levitated rotating electrical machine characterized by being arranged close to each other so as to overlap each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP118286U JPH0314936Y2 (en) | 1986-01-10 | 1986-01-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP118286U JPH0314936Y2 (en) | 1986-01-10 | 1986-01-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62115753U JPS62115753U (en) | 1987-07-23 |
| JPH0314936Y2 true JPH0314936Y2 (en) | 1991-04-02 |
Family
ID=30778849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP118286U Expired JPH0314936Y2 (en) | 1986-01-10 | 1986-01-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0314936Y2 (en) |
-
1986
- 1986-01-10 JP JP118286U patent/JPH0314936Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62115753U (en) | 1987-07-23 |
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