JP2591862Y2 - Variable gap synchronous motor - Google Patents
Variable gap synchronous motorInfo
- Publication number
- JP2591862Y2 JP2591862Y2 JP1992064969U JP6496992U JP2591862Y2 JP 2591862 Y2 JP2591862 Y2 JP 2591862Y2 JP 1992064969 U JP1992064969 U JP 1992064969U JP 6496992 U JP6496992 U JP 6496992U JP 2591862 Y2 JP2591862 Y2 JP 2591862Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- housing
- axial direction
- peripheral surface
- synchronous motor
- 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 - Lifetime
Links
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、界磁に永久磁石を用い
てインバータによって駆動する可変ギャップ同期電動機
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable gap synchronous motor driven by an inverter using a permanent magnet as a field.
【０００２】[0002]
【従来の技術】従来、永久磁石界磁を備えた同期回転電
機として、電機子巻線を備えた固定子の内周面と永久磁
石界磁を備えた回転子の外周面を共にテーパ状とすると
共に、回転子を軸方向に移動可能にして、固定子と回転
子の間の空隙を変化させ、空隙磁束を調整するものが開
示されている。（例えば、特開昭６４−５０７４４号、
特開平３−４５１５１号公報）。回転子を軸方向に移動
する機構としては、錘が遠心力により移動する径方向の
変位をカムを介して回転子の軸方向変位に変換するもの
や、回転子を固定した回転軸を軸方向移動機構により移
動するようにしてある。2. Description of the Related Art Conventionally, as a synchronous rotating electric machine having a permanent magnet field, both an inner peripheral surface of a stator having an armature winding and an outer peripheral surface of a rotor having a permanent magnet field have tapered shapes. In addition, there is disclosed an apparatus in which the rotor is movable in the axial direction, the air gap between the stator and the rotor is changed, and the air gap magnetic flux is adjusted. (For example, JP-A-64-50744,
JP-A-3-45151). As a mechanism for moving the rotor in the axial direction, a mechanism that converts a radial displacement in which the weight moves by centrifugal force into an axial displacement of the rotor via a cam, or a mechanism in which the rotating shaft on which the rotor is fixed is axially moved It is moved by a moving mechanism.
【０００３】[0003]
【考案が解決しようとする課題】ところが、上記錘の遠
心力によって回転子を軸方向に移動する構成では、回転
部分が多く、高速運転の時に振動が発生したり、遠心力
に耐える構造にするための機構が大きくなるという欠点
があった。また、回転子を固定した回転軸を直接移動す
る構成では、回転軸に結合した負荷が同時に移動しない
ように、負荷と回転軸との間にスライド装置などを設け
る必要があり、構造が複雑になるという問題があった。
本考案は、高速回転においても振動が発生せず、構造が
簡単な可変ギャップ同期電動機を提供することを目的と
するものである。However, the structure in which the rotor is moved in the axial direction by the centrifugal force of the weight has a large number of rotating parts, so that vibrations are generated during high-speed operation and the structure is resistant to centrifugal force. However, there is a drawback that the mechanism for this becomes large. In addition, in the configuration in which the rotating shaft with the rotor fixed is directly moved, it is necessary to provide a slide device or the like between the load and the rotating shaft so that the load coupled to the rotating shaft does not move at the same time. There was a problem of becoming.
SUMMARY OF THE INVENTION An object of the present invention is to provide a variable gap synchronous motor which does not generate vibration even at high speed rotation and has a simple structure.
【０００４】[0004]
【課題を解決するための手段】本考案は、内周面をテー
パ状に形成した固定子と、前記固定子の内周面に空隙を
介して対向し、かつ永久磁石界磁の外周面をテーパ状に
形成した回転子と、前記回転子を軸方向に移動可能に支
持した回転軸と、前記回転子の回転速度に比例した軸方
向の推力を発生して前記回転子を軸方向に移動させ、か
つ前記回転軸を支持するブラケットに固定した前記推力
発生装置と、前記推力発生装置によって軸方向にのみ移
動し得るハウジング部と、前記ハウジング部と前記回転
子との間に前記ハウジング部を支持する軸受とからなる
可変ギャップ同期電動機において、前記推力発生装置
が、一方端を前記ハウジング部に固定し、他方端を前記
ブラケットに固定した軸方向に伸縮し得る圧電素子から
なることを特徴とし、また、内周面をテーパ状に形成し
た固定子と、前記固定子の内周面に空隙を介して対向
し、かつ永久磁石界磁の外周面をテーパ状に形成した回
転子と、前記回転子を軸方向に移動可能に支持した回転
軸と、前記回転子の回転速度に比例した軸方向の推力を
発生して前記回転子を軸方向に移動させ、かつ前記回転
軸を支持するブラケットに固定した前記推力発生装置
と、前記推力発生装置によって軸方向にのみ移動し得る
ハウジング部と、前記ハウジング部と前記回転子との間
に前記ハウジング部を支持する軸受とからなる可変ギャ
ップ同期電動機において、前記推力発生装置が、前記ブ
ラケットに固定し、かつ前記ハウジング部に空隙を介し
て対向して前記ハウジング部を吸引する電磁石と、前記
ハウジング部を前記電磁石の吸引方向と逆方向に押し付
ける圧縮バネとからなることを特徴とし、さらに、前記
推力発生装置と前記ハウジング部との間に前記推力発生
装置の軸方向変位量を拡大する拡大機構を設けたことを
特徴としている。According to the present invention, a stator having an inner peripheral surface formed into a tapered shape is opposed to an inner peripheral surface of the stator via a gap, and an outer peripheral surface of a permanent magnet field is formed. A rotor formed in a tapered shape, a rotating shaft supporting the rotor movably in the axial direction, and moving the rotor in the axial direction by generating an axial thrust proportional to the rotation speed of the rotor. The thrust generator fixed to a bracket that supports the rotating shaft, a housing part that can be moved only in the axial direction by the thrust generator, and the housing part between the housing part and the rotor. In a variable gap synchronous motor including a bearing to support, the thrust generating device comprises a piezoelectric element having one end fixed to the housing portion and the other end fixed to the bracket and capable of expanding and contracting in an axial direction. A stator having an inner peripheral surface formed in a tapered shape, a rotor having an inner peripheral surface facing the inner peripheral surface of the stator via a gap, and an outer peripheral surface of a permanent magnet field formed in a tapered shape; A rotating shaft that supports the rotor movably in the axial direction, and a bracket that supports the rotating shaft by moving the rotor in the axial direction by generating an axial thrust proportional to the rotation speed of the rotor. In the variable gap synchronous motor including the fixed thrust generating device, a housing portion that can move only in the axial direction by the thrust generating device, and a bearing that supports the housing portion between the housing portion and the rotor. An electromagnet, wherein the thrust generating device is fixed to the bracket, and opposes the housing portion via a gap to suck the housing portion, and reverses a direction in which the housing portion is attracted by the electromagnet. And characterized in that it consists of a compression spring for pressing in direction, further characterized in that a magnifying mechanism for enlarging the axial displacement amount of the thrust generating apparatus between the thrust generating unit and the housing unit.
【０００５】[0005]
【作用】電機子巻線に電圧を印加して回転子を回転さ
せ、回転子の回転速度に比例する電圧を圧電素子や電磁
石などの推力発生装置に入力して、回転速度に応じてハ
ウジング部を軸方向に移動させ、ハウジング部は軸受を
介して回転子を軸方向に移動させ、回転子と固定子との
間の空隙を大きくする。その結果、空隙磁束は弱められ
るので、弱め界磁制御を行うことができるFunction: A voltage is applied to an armature winding to rotate a rotor, and a voltage proportional to the rotation speed of the rotor is input to a thrust generator such as a piezoelectric element or an electromagnet, and a housing portion is formed in accordance with the rotation speed. Is moved in the axial direction, and the housing part moves the rotor in the axial direction via the bearing, thereby increasing the gap between the rotor and the stator. As a result, the air gap magnetic flux is weakened, so that the field weakening control can be performed.
【０００６】[0006]
【実施例】本考案を図に示す実施例について説明する。
図１は本考案の実施例を示す側断面図で、円筒状のフレ
ーム１の内側に電機子巻線２１を備えた固定子２の内周
面をテーパ状に形成し、固定子２の内周面に空隙を介し
て対向する永久磁石３１を備えた回転子３の外周面をテ
ーパ状にしてある。フレーム１の両端面に固定したブラ
ケット４、４’には軸受４１、４１’を介して、回転軸
５を支持し、回転軸５には回転子３を軸方向にのみ摺動
可能に支持してある。回転子３の一方側端面には、円筒
部３２を設け、円筒部３２の外周に軸受６の内周を固定
してある。軸受６の外周にはハウジング部６１を固定
し、ハウジング部６１とブラケット４との間に軸方向に
変位する圧電素子７を固定してある。電機子巻線２１に
図示しないインバータにより電圧を印加して回転子３を
回転させるとともに、例えば、インバータの速度指令周
波数ＦをＦ／Ｖ変換器を介し、回転速度に比例する電圧
を圧電素子７が収縮する方向に印加すると、回転子３は
回転しながら圧電素子７によってブラケット４の方向に
引きつけられ、回転軸５上を摺動して空隙が大きくなる
方向に変位する。その結果、空隙磁束は弱められ、弱め
界磁となるが、圧電素子７の電圧を制御することによ
り、空隙の大きさを制御して弱め界磁制御を行うことが
できる。図２は第２の実施例を示す側断面図で、レバー
７１の一方端を圧電素子７の先端に回転自在にピン連結
し、他方端をハウジング部６１の外周に設けた支持部６
２にピン連結させ、圧電素子７に近い位置をブラケット
４に設けた支持部４２に回転自在にピン連結してあり、
圧電素子７の軸方向変位量をレバー７１によって拡大す
る拡大機構を形成してある。この拡大機構を介して圧電
素子７の軸方向変位量をハウジング部６１に伝達するよ
うにしてあるので、圧電素子７の軸方向変位量が小さく
ても、回転子３と固定子２の間の空隙を大きく変化させ
ることができる。なお、この場合、圧電素子７は電圧を
印加すると軸方向に伸長するものを使用すればよい。図
３は第３の実施例を示す側断面図で、圧電素子７の代わ
りに、ハウジング部６１の端面に対向する電磁石８をブ
ラケット４に設けるとともに、ハウジング部６１がブラ
ケット４に対して軸方向にのみ摺動できるようにしてあ
る。ハウジング部６１とブラケット４との間には圧縮バ
ネ９を設けて、ハウジング部６１および軸受６を介して
回転子３を常に空隙が小さくなる方向に押し付けるよう
にしてある。 電磁石８には、回転速度に比例する電圧
を印加し、高速になるにしたがって電磁石８によってハ
ウジング部６１を吸引する磁気吸引力を大きくするよう
にしてある。この磁気吸引力により、ハウジング部６１
および軸受６を介し、圧縮バネ９に抗して回転子３を吸
引し、回転子３と固定子２の間の空隙を大きくして弱め
界磁制御を行うものである。このように、圧電素子や電
磁石などの推力発生装置により軸方向に移動するハウジ
ング部は軸受を介して回転子を軸方向に移動させるの
で、ハウジング部は回転することがなく、回転子と共に
回転する部分は軸受のみとなり、回転部分を小さくする
ことができる。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 is a side sectional view showing an embodiment of the present invention. An inner peripheral surface of a stator 2 having an armature winding 21 inside a cylindrical frame 1 is formed into a tapered shape. The outer peripheral surface of the rotor 3 having the permanent magnet 31 facing the peripheral surface via a gap is tapered. Brackets 4 and 4 'fixed to both end surfaces of the frame 1 support a rotating shaft 5 via bearings 41 and 41', and a rotating shaft 5 supports the rotor 3 so as to be slidable only in the axial direction. It is. A cylindrical portion 32 is provided on one end surface of the rotor 3, and the inner periphery of the bearing 6 is fixed to the outer periphery of the cylindrical portion 32. A housing portion 61 is fixed to the outer periphery of the bearing 6, and an axially displaced piezoelectric element 7 is fixed between the housing portion 61 and the bracket 4. A voltage is applied to the armature winding 21 by an inverter (not shown) to rotate the rotor 3, and, for example, a speed command frequency F of the inverter is changed via an F / V converter to a voltage proportional to the rotation speed by the piezoelectric element 7. When the rotor 3 is applied in the contracting direction, the rotor 3 is attracted by the piezoelectric element 7 in the direction of the bracket 4 while rotating, and slides on the rotating shaft 5 to be displaced in a direction to increase the gap. As a result, the air gap magnetic flux is weakened and becomes a weak magnetic field. By controlling the voltage of the piezoelectric element 7, the size of the air gap can be controlled to perform the weak magnetic field control. FIG. 2 is a side sectional view showing the second embodiment, in which one end of a lever 71 is rotatably connected to the tip of a piezoelectric element 7 by a pin, and the other end is provided on the outer periphery of a housing 61.
2, and a position close to the piezoelectric element 7 is rotatably pin-connected to a support portion 42 provided on the bracket 4.
An enlargement mechanism for enlarging the axial displacement amount of the piezoelectric element 7 by the lever 71 is formed. Since the amount of axial displacement of the piezoelectric element 7 is transmitted to the housing portion 61 via this enlargement mechanism, even if the amount of axial displacement of the piezoelectric element 7 is small, the distance between the rotor 3 and the stator 2 is small. The gap can be greatly changed. In this case, a piezoelectric element that expands in the axial direction when a voltage is applied may be used. FIG. 3 is a side sectional view showing the third embodiment. In place of the piezoelectric element 7, an electromagnet 8 facing the end face of the housing 61 is provided on the bracket 4, and the housing 61 is moved in the axial direction with respect to the bracket 4. It can slide only on A compression spring 9 is provided between the housing part 61 and the bracket 4 so as to always press the rotor 3 via the housing part 61 and the bearing 6 in a direction to reduce the gap. A voltage proportional to the rotation speed is applied to the electromagnet 8, and as the speed increases, the magnetic attraction force for attracting the housing 61 by the electromagnet 8 increases. Due to this magnetic attractive force, the housing portion 61
In addition, the rotor 3 is attracted through the bearing 6 against the compression spring 9, and the gap between the rotor 3 and the stator 2 is increased to perform field weakening control. As described above, since the housing portion that moves in the axial direction by the thrust generating device such as the piezoelectric element or the electromagnet moves the rotor in the axial direction via the bearing, the housing portion does not rotate and rotates with the rotor. The part is only the bearing, and the rotating part can be reduced.
【０００７】[0007]
【考案の効果】以上述べたように、本考案によれば、回
転子と共に回転する部分を小さくすることができるの
で、高速回転においても振動が発生せず、構造が簡単と
なる可変ギャップ同期電動機を提供できる効果がある。As described above, according to the present invention, the portion that rotates together with the rotor can be reduced, so that vibration does not occur even at high speed rotation, and the variable gap synchronous motor has a simple structure. There is an effect that can be provided.
【図１】本考案の実施例を示す側断面図である。FIG. 1 is a side sectional view showing an embodiment of the present invention.
【図２】本考案の第２の実施例を示す側断面図である。FIG. 2 is a side sectional view showing a second embodiment of the present invention.
【図３】本考案の第３の実施例を示す側断面図である。FIG. 3 is a side sectional view showing a third embodiment of the present invention.
１ フレーム ２ 固定子 ２１ 電機子巻線 ３ 回転子 ３１ 永久磁石 ４、４’ ブラケット ４１、４１’、６ 軸受 ４２、６２ 支持部 ５ 回転軸 ７ 圧電素子 ７１ レバー ８ 電磁石 ９ 圧縮バネ DESCRIPTION OF SYMBOLS 1 Frame 2 Stator 21 Armature winding 3 Rotor 31 Permanent magnet 4, 4 'Bracket 41, 41', 6 Bearing 42, 62 Supporting part 5 Rotating shaft 7 Piezoelectric element 71 Lever 8 Electromagnet 9 Compression spring
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭64−50744（ＪＰ，Ａ) 特公 昭43−10683（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.6，ＤＢ名) H02K 21/00 H02K 1/06 H02K 5/24 H02K 29/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-50744 (JP, A) JP-B-43-10683 (JP, B1) (58) Fields investigated (Int. Cl. 6 , DB name) H02K 21/00 H02K 1/06 H02K 5/24 H02K 29/00
Claims (3)
石界磁の外周面をテーパ状に形成した回転子と、 前記回転子を軸方向に移動可能に支持した回転軸と、前記回転子の回転速度に比例した軸方向の推力を発生し
て 前記回転子を軸方向に移動させ、かつ前記回転軸を支
持するブラケットに固定した前記推力発生装置と、 前記推力発生装置によって軸方向にのみ移動し得るハウ
ジング部と、 前記ハウジング部と前記回転子との間に前記ハウジング
部を支持する軸受とからなる 可変ギャップ同期電動機に
おいて、前記推力発生装置が、一方端を前記ハウジング部に固定
し、他方端を前記ブラケットに固定した軸方向に伸縮し
得る圧電素子からなる ことを特徴とする可変ギャップ同
期電動機。A stator having an inner peripheral surface formed in a tapered shape; and a rotor having an inner peripheral surface facing the inner peripheral surface of the stator via a gap and having an outer peripheral surface of a permanent magnet field formed in a tapered shape. A rotating shaft that supports the rotor movably in the axial direction, and an axial thrust that is proportional to the rotational speed of the rotor.
To move the rotor in the axial direction and support the rotation shaft.
A thrust generator fixed to a bracket to be held, and how to move only in the axial direction by the thrust generator.
A housing, and a housing between the housing and the rotor.
A variable gap synchronous motor comprising a bearing for supporting a portion , wherein the thrust generating device has one end fixed to the housing portion.
And extend and contract in the axial direction with the other end fixed to the bracket.
A variable gap synchronous motor comprising a piezoelectric element obtained .
石界磁の外周面をテーパ状に形成した回転子と、 前記回転子を軸方向に移動可能に支持した回転軸と、 前記回転子の回転速度に比例した軸方向の推力を発生し
て前記回転子を軸方向に移動させ、かつ前記回転軸を支
持するブラケットに固定した前記推力発生装置と、 前記推力発生装置によって軸方向にのみ移動し得るハウ
ジング部と、 前記ハウジング部と前記回転子との間に前記ハウジング
部を支持する軸受とからなる可変ギャップ同期電動機に
おいて、 前記推力発生装置が、前記ブラケットに固定し、かつ前
記ハウジング部に空隙を介して対向して前記ハウジング
部を吸引する電磁石と、前記ハウジング部を前記電磁石
の吸引方向と逆方向に押し付ける圧縮バネとからなるこ
とを特徴とする 可変ギャップ同期電動機。2. A stator having an inner peripheral surface formed into a tapered shape, and a stator facing an inner peripheral surface of the stator via an air gap and having a permanent magnet.
A rotor having a tapered outer peripheral surface of the stone field, a rotating shaft supporting the rotor movably in the axial direction, and an axial thrust proportional to the rotation speed of the rotor.
To move the rotor in the axial direction and support the rotation shaft.
A thrust generator fixed to a bracket to be held, and how to move only in the axial direction by the thrust generator.
A housing, and a housing between the housing and the rotor.
Variable gap synchronous motor consisting of a bearing that supports the section
The thrust generator is fixed to the bracket and
The housing portion is opposed to the housing portion via a gap.
An electromagnet for attracting the housing and the electromagnet
Compression spring that presses in the opposite direction to the suction direction
And a variable gap synchronous motor.
間に前記推力発生装置の軸方向変位量を拡大する拡大機
構を設けた請求項１または２記載の可変ギャップ同期電
動機。3. The system according to claim 1, wherein the thrust generator and the housing are connected to each other.
Magnifier that increases the axial displacement of the thrust generator during
The variable gap synchronous motor according to claim 1 or 2, further comprising a frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992064969U JP2591862Y2 (en) | 1992-08-24 | 1992-08-24 | Variable gap synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992064969U JP2591862Y2 (en) | 1992-08-24 | 1992-08-24 | Variable gap synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0624382U JPH0624382U (en) | 1994-03-29 |
| JP2591862Y2 true JP2591862Y2 (en) | 1999-03-10 |
Family
ID=13273389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992064969U Expired - Lifetime JP2591862Y2 (en) | 1992-08-24 | 1992-08-24 | Variable gap synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591862Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4555774B2 (en) * | 2003-03-31 | 2010-10-06 | ヤマハ発動機株式会社 | Rotating electric machine and electric vehicle |
| JP5164611B2 (en) * | 2008-03-04 | 2013-03-21 | 株式会社牧野フライス製作所 | Machine Tools |
| JP5384144B2 (en) * | 2009-03-03 | 2014-01-08 | 本田技研工業株式会社 | Axial gap type motor |
-
1992
- 1992-08-24 JP JP1992064969U patent/JP2591862Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0624382U (en) | 1994-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0208124A2 (en) | Improvement in stepper motors | |
| JP3294178B2 (en) | Bearing system and brushless DC motor using the same | |
| JP2001161052A (en) | Permanent magnet rotary machine and permanent magnet wind power generator | |
| JP2591862Y2 (en) | Variable gap synchronous motor | |
| EP0464596B1 (en) | Dynamic pressure bearing | |
| JP2001008407A (en) | Drive motor | |
| JP2001062596A (en) | Press machine assembling method and press machine | |
| JPH08322194A (en) | Axial magnetic levitation motor and rotating machine employing it | |
| JPH0624383U (en) | Variable gap synchronous motor | |
| JP3240637B2 (en) | Bearing device | |
| JPS62185544A (en) | Direct drive motor | |
| JP2553825Y2 (en) | Preload device for high-speed rotating spindle bearings | |
| JP3128852B2 (en) | Stepping motor structure | |
| JPH07308056A (en) | Magnet generator | |
| JP2560507Y2 (en) | Dynamic pressure bearing device | |
| Tokumoto et al. | Development of Lorentz force type self-bearing motor | |
| JP2932344B2 (en) | Rotating electric machine | |
| JPS6213409Y2 (en) | ||
| JP2001352725A (en) | Generator motor for flywheel energy storage | |
| JPS601311Y2 (en) | Rotor vibration prevention device | |
| JPS63157663A (en) | Hysteresis brake | |
| JPH08109953A (en) | Driving device | |
| JPH09100835A (en) | Magnetic bearing device | |
| JP3674991B2 (en) | Rotating polygon mirror drive | |
| JPH07248022A (en) | Bearing device |