JPH04281359A - Linear synchronous machine - Google Patents
Linear synchronous machineInfo
- Publication number
- JPH04281359A JPH04281359A JP3764791A JP3764791A JPH04281359A JP H04281359 A JPH04281359 A JP H04281359A JP 3764791 A JP3764791 A JP 3764791A JP 3764791 A JP3764791 A JP 3764791A JP H04281359 A JPH04281359 A JP H04281359A
- Authority
- JP
- Japan
- Prior art keywords
- armature
- armature core
- synchronous machine
- field
- linear synchronous
- 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.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229910052742 iron Inorganic materials 0.000 claims abstract description 42
- 230000005291 magnetic effect Effects 0.000 claims description 30
- 230000001133 acceleration Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000001141 propulsive effect Effects 0.000 description 14
- 230000004907 flux Effects 0.000 description 13
- 238000004804 winding Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000004020 conductor Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000002123 temporal effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Linear Motors (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、直線往復動シミレー
タ、搬送装置を駆動するリニア同期機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear reciprocating simulator and a linear synchronous machine for driving a conveying device.
【０００２】0002
【従来の技術】リニア同期機の電機子鉄心の長さＬが界
磁の長さよりも短く構成されている車上一次方式のリニ
ア同期機では、電機子巻線に多相電源を接続して界磁の
全区間で電機子が加速、減速、一定速度、停止や反復往
復運動ができるように制御される。[Prior Art] In an on-board primary type linear synchronous machine in which the length L of the armature core of the linear synchronous machine is shorter than the length of the field, a multiphase power supply is connected to the armature winding. The armature is controlled to accelerate, decelerate, maintain constant speed, stop, and repeatedly move back and forth throughout the field.
【０００３】図６は従来のリニア同期機の断面図であり
後述の図７のＢ−Ｂ断面でもある。また、図７は図６の
Ａ−Ａ断面図である。これらの図において、図７のレー
ル３２の上を走行する車輪３１で移動可能の架台３０に
取付けられた電機子１と固定して設けられる界磁２とか
らなり、電機子１は電機子鉄心１１と電機子巻線１２と
からなり、電機子巻線１２は電機鉄心１１に多数設けら
れているスロット１３に納められており、このスロット
１３は電機子鉄心１１の界磁２側に突出する歯１４の間
に形成されている。界磁２は界磁鉄心２１及び界磁巻線
２２からなる界磁極２３とこの界磁極が固定される継鉄
２４とからなっている。この継鉄２４は互いに極性が交
互に反転して並べられている界磁極２３を磁気的に連結
する磁気回路を形成している。FIG. 6 is a sectional view of a conventional linear synchronous machine, and is also a BB cross section in FIG. 7, which will be described later. Moreover, FIG. 7 is a sectional view taken along the line AA in FIG. 6. In these figures, the armature 1 is made up of an armature 1 mounted on a frame 30 that is movable by wheels 31 running on rails 32 in FIG. 7, and a field 2 that is fixedly provided. 11 and an armature winding 12, the armature winding 12 is housed in a number of slots 13 provided in the electric machine core 11, and these slots 13 protrude toward the field 2 side of the armature core 11. It is formed between the teeth 14. The field 2 consists of a field pole 23 consisting of a field core 21 and a field winding 22, and a yoke 24 to which this field pole is fixed. The yoke 24 forms a magnetic circuit that magnetically connects the field poles 23 which are arranged with their polarities alternately reversed.
【０００４】電機子巻線１２は多くは３相交流電源で励
磁される３相巻線になっていて回転機が回転磁場を形成
する原理と同様に電機子鉄心１１と界磁鉄心１２とのあ
いだの空隙１５に進行磁場を形成する。この進行磁場と
界磁２が生成する磁場の相互作用によって電機子１と界
磁２との間に電磁力が働き電子１及びこれが取付けられ
ている架台３０の推進力となって図６の左右の方向、図
７では紙面に垂直の方向に移動する。The armature winding 12 is often a three-phase winding excited by a three-phase AC power supply, and the armature core 11 and the field core 12 are connected to each other in the same way as a rotating machine forms a rotating magnetic field. A traveling magnetic field is formed in the air gap 15 between them. Due to the interaction between this traveling magnetic field and the magnetic field generated by the field 2, an electromagnetic force is generated between the armature 1 and the field 2, which becomes a propulsive force for the electron 1 and the pedestal 30 on which it is attached. , in the direction perpendicular to the plane of the paper in FIG.
【０００５】図８は電機子１が一定速度で移動している
ときの速度の時間変化の一例を示すグラフである。この
図において、横軸は時間、縦軸は速度であり、実線Ｂは
実際の速度であり図に示すように周期τで正弦波状に変
化していることが実測される。鎖線Ａはその平均速度で
ある。FIG. 8 is a graph showing an example of a change in speed over time when the armature 1 is moving at a constant speed. In this figure, the horizontal axis is time, the vertical axis is velocity, and the solid line B is the actual velocity, which is actually measured to change sinusoidally with a period τ as shown in the figure. The dashed line A is the average speed.
【０００６】このような速度の変動は電機子１に働く推
進力が時間とともに周期的に変化することから生ずるも
のであり、電磁力の変動の発生は次のような理由による
ものである。[0006] Such fluctuations in speed occur because the propulsive force acting on the armature 1 changes periodically over time, and the fluctuations in electromagnetic force occur for the following reasons.
【０００７】図９は図６の電機子１の左右端を拡大しこ
の部分の漏れ磁束分布を追記した断面図であり、構造的
には図６と同様なので断面のハッチ及び符号の記載を省
略してある。この図において、電機子鉄心１１は強磁性
体でありその比透磁率は１に比べてはるかに大きいので
、周知のように電機子鉄心１１の表面から漏れ出す磁束
は表面に直角になりこれによって生ずる磁気力の方向も
面に垂直になる。電機子鉄心１１の右表面の漏れ磁束Φ
Ｒ によって生ずる磁気力を図のようにＦＲ 、左表面
の漏れ磁束ΦＬ によって生ずる磁気力を図のようにＦ
Ｌ とそれぞれすると、これらの磁気力ＦＲ，ＦＬ は
図示のように反対方向なので、それぞれの値が同じ場合
には電機子１の推進力にはなんら影響はない。しかし、
界磁２との位置関係から磁気力ＦＲ ，ＦＬ は電機子
１が界磁２の極ピッチＴだけ移動するごとに周期的に変
動する。この変動がＦＲ とＦＬ とで一致していない
ために結果的にＦＲ とＦＬ との差の力が推進力の時
間的変動ΔＦＡ となり図８の速度の変動となって表れ
るものである。FIG. 9 is an enlarged cross-sectional view of the left and right ends of the armature 1 in FIG. 6 and the leakage flux distribution in this part is added. Since the structure is the same as that in FIG. 6, the cross-sectional hatches and symbols are omitted. It has been done. In this figure, the armature core 11 is a ferromagnetic material and its relative magnetic permeability is much larger than 1, so as is well known, the magnetic flux leaking from the surface of the armature core 11 is perpendicular to the surface. The direction of the generated magnetic force is also perpendicular to the plane. Leakage flux Φ on the right surface of armature core 11
The magnetic force generated by R is FR as shown in the figure, and the magnetic force generated by the leakage magnetic flux ΦL on the left surface is F as shown in the figure.
Since these magnetic forces FR and FL are in opposite directions as shown in the figure, there is no effect on the propulsive force of the armature 1 if their respective values are the same. but,
Due to the positional relationship with the field 2, the magnetic forces FR and FL vary periodically every time the armature 1 moves by the pole pitch T of the field 2. Since this fluctuation does not match between FR and FL, the difference in force between FR and FL results in the temporal fluctuation ΔFA of the propulsive force, which appears as the speed fluctuation shown in FIG. 8.
【０００８】[0008]
【発明が解決しようとする課題】前述のような速度又は
加速度が時間的に変動すると、例えば、自動車の走行を
シミュレーションするのに使用される直線往復動シミュ
レータの場合には、架台３０の上に図示しない座席に座
る乗員が加速度の変動による振動を体感し不快感を持つ
という問題がある。また、物体を搬送するための搬送装
置の場合には、搬送する物体が振動によって損傷する可
能性が生ずるという問題がある。[Problems to be Solved by the Invention] When the speed or acceleration as described above changes over time, for example, in the case of a linear reciprocating motion simulator used to simulate the driving of an automobile, the There is a problem in that an occupant sitting in a seat (not shown) experiences vibrations due to changes in acceleration and feels uncomfortable. Further, in the case of a conveying device for conveying an object, there is a problem that the object being conveyed may be damaged by vibration.
【０００９】この発明の目的はこのような問題を解決し
、速度及び加速度の時間的変動の小さなリニア同期機を
提供することにある。An object of the present invention is to solve these problems and provide a linear synchronous machine with small temporal fluctuations in velocity and acceleration.
【００１０】0010
【課題を解決するための手段】上記課題を解決するため
に、この発明によれば、可動体に取付けられた電機子と
この電機子と対向して固定して配置された界磁からなる
リニア同期機において、前記電機子の鉄心である電機子
鉄心の移動方向の前端と後端の両端部に、前記界磁との
間の空隙寸法が外側に向かって所定の角度で増大する傾
斜部を設けてなるものとし、また、傾斜部が、界磁との
間の空隙寸法が外側に向かって増大する傾斜を持つ鉄片
からなり、この鉄片を電機子鉄心の両端面に取付けてな
るものとし、また、鉄片がＬ字形の断面を持ち、Ｌ字の
一方の辺が電機子鉄心の移動方向の前端と後端の両端面
に取付けられ、他方の辺が界磁に対して傾斜が設けられ
てなるものとし、又は、電機子鉄心の両端近傍が傾斜部
を構成してなり、前期電機子鉄心の界磁に対向する側に
並べて設けられている歯の突出寸法を外側に近いほど小
さくしてなる傾斜部を形成してなるものとし、電機子鉄
心の両端部が移動方向にそれぞれ突出し、この突出部の
界磁と対向する面が傾斜部を形成してなるものとし、更
に、歯を切り欠いて形成する傾斜部と、鉄片又は電機子
鉄心の突出部が形成する傾斜部とが実質的に１つの傾斜
部を形成してなることを特徴とする請求項２、３又は５
と、４とを併用してなるものとする。[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a linear motor comprising an armature attached to a movable body and a field fixedly disposed opposite to the armature is provided. In the synchronous machine, the armature iron core, which is the iron core of the armature, has inclined portions at both front and rear ends in the moving direction of the armature core, in which the gap size with the field increases outward at a predetermined angle. Further, the inclined portion is made of an iron piece having an inclination such that the gap size between the field and the magnetic field increases toward the outside, and the iron piece is attached to both end faces of the armature core, In addition, the iron piece has an L-shaped cross section, one side of the L shape is attached to both end faces of the front end and rear end in the moving direction of the armature core, and the other side is inclined with respect to the field. Or, the vicinity of both ends of the armature core constitutes an inclined part, and the protruding dimensions of the teeth arranged side by side on the side facing the field of the former armature core are made smaller as they are closer to the outside. Both ends of the armature core protrude in the direction of movement, and the surface of the protrusion facing the field forms an inclined part. Claim 2, 3, or 5, characterized in that the slope portion formed by the chipping and the slope portion formed by the protruding portion of the iron piece or the armature core substantially form one slope portion.
and 4 in combination.
【００１１】[0011]
【作用】この発明の構成において、電機子鉄心の移動方
向の前端と後端の両端部に、界磁との間の空隙寸法が外
側に向かって所定の角度で増大する傾斜部を設けること
によって、電機子鉄心の端部に発生する漏れ磁場によっ
て発生する両端の磁気力の差が減少する。また、傾斜部
を、界磁との間の空隙寸法が外側に向かって増大する傾
斜を持つ鉄片で構成することにより、電機子鉄心の構成
、寸法を変更する必要がないとともに鉄片に安価な鋼材
を使用することができる。また、鉄片をＬ字形断面で構
成して一方の辺を電機子鉄心の移動方向の前端と後端の
両端面に取付けることによってボルト締めなどの方法で
容易に取付けが可能であり、他方の辺を界磁に対して傾
斜を設けることにより傾斜部を容易に形成することがで
きる。又は、電機子鉄心の界磁に対向する側に並べて設
けられている歯の突出寸法を外側に近いほど小さくする
ことによって傾斜部を形成することによって、電機子の
進行方向寸法を従来と同じにできる。また、電機子鉄心
の両端部を移動方向にそれぞれ突出させた形状とし、こ
の突出部の界磁と対向する面を前述と同じように傾斜さ
せて傾斜部を形成することにより鉄片を取付ける必要が
なくなる。更に、電機子鉄心の歯を切り欠いて形成する
傾斜部と鉄片又は電機子鉄心の突出部が形成する傾斜部
とが実質的に１つの傾斜部を形成するようにすることに
より、必要とする傾斜部の移動方向寸法を確保してしか
も電機子の移動方向寸法の増大を最小限にすることがで
きる。[Operation] In the structure of the present invention, by providing inclined portions at both the front and rear ends of the armature core in the moving direction, the gap size between the armature and the field increases toward the outside at a predetermined angle. , the difference in magnetic force between the ends of the armature core due to the leakage magnetic field generated at the ends of the armature core is reduced. In addition, by configuring the inclined part with a piece of iron with a slope in which the gap size between the field and the magnetic field increases toward the outside, there is no need to change the configuration or dimensions of the armature core, and the piece is made of inexpensive steel. can be used. In addition, by configuring the iron piece with an L-shaped cross section and attaching one side to both the front and rear end faces in the direction of movement of the armature core, it can be easily attached by bolting or other methods. By providing a slope with respect to the field, the slope portion can be easily formed. Alternatively, the dimensions of the armature in the advancing direction can be kept the same as before by forming an inclined part by making the protruding dimensions of the teeth arranged on the side facing the field of the armature core smaller toward the outside. can. In addition, it is necessary to attach the iron piece by making both ends of the armature core protrude in the direction of movement, and by slanting the surface of the protruding part facing the field in the same manner as described above to form a sloping part. It disappears. Furthermore, by making the inclined part formed by cutting out the teeth of the armature core and the inclined part formed by the iron piece or the protruding part of the armature core substantially form one inclined part, the required It is possible to secure the dimension of the inclined portion in the direction of movement, and to minimize the increase in the dimension of the armature in the direction of movement.
【００１２】0012
【実施例】以下この発明を実施例に基づいて説明する。
図１はこの発明の実施例を示すリニア同期機の断面図で
あり、図６と同じ部材については共通の符号を付けるこ
とにより詳しい説明を省略する。この図において、電機
子鉄心１１の図の左右の端面に鉄片４１，４２を取付け
てある点が図６と異なる。鉄片４１，４の界磁２と対向
する側の面は電機子１の移動方向に対してθの角度の傾
斜を持たせてある。EXAMPLES The present invention will be explained below based on examples. FIG. 1 is a sectional view of a linear synchronous machine showing an embodiment of the present invention, and the same members as those in FIG. 6 are given the same reference numerals and detailed explanations will be omitted. This figure differs from FIG. 6 in that iron pieces 41 and 42 are attached to the left and right end faces of the armature core 11 in the figure. The surfaces of the iron pieces 41 and 4 facing the field 2 are inclined at an angle of θ with respect to the moving direction of the armature 1.
【００１３】鉄片４１，４２は強磁性体でありその比透
磁率はら１に対して充分大きいのでこれを設けることに
よって電機子鉄心１１の両端の漏れ磁束の分布は主にこ
れら鉄片４１，４２の傾斜面と界磁２との間に分布する
。The iron pieces 41 and 42 are ferromagnetic and their relative magnetic permeability is sufficiently large relative to 1, so by providing them, the leakage flux distribution at both ends of the armature core 11 is mainly controlled by the iron pieces 41 and 42. It is distributed between the inclined surface and the field 2.
【００１４】図２は後述の条件の基に図１のリニア同期
機について図８と同様に速度の時間変動を求めた結果を
示すグラフであり、図８と共通な事項は説明を省略する
。一点鎖線で示す直線Ａは速度平均値、実線Ｂで示す正
弦波は従来のリニア同期機の速度であり図８を再掲した
ものである。点線Ｃで示す正弦波は鉄片４１，４２を設
けた図１のリニア同期機の速度である。これらの値を求
めたリニア同期機の寸法緒言はそれぞれ、界磁２の極ピ
ッチ；Ｔ＝１００ｍｍ、鉄片４１，４２の移動方向寸法
Ａ＝１２０ｍｍ、同じく傾斜角度θ＝１０°。その他の
緒言は図５の従来のリニア同期機と同じである。FIG. 2 is a graph showing the results of the time variation of speed obtained for the linear synchronous machine of FIG. 1 in the same way as FIG. 8 based on the conditions described later, and the explanation of the same items as FIG. 8 will be omitted. Straight line A shown by a dashed-dotted line is the speed average value, and a sine wave shown by solid line B is the speed of a conventional linear synchronous machine, which is a reproduction of FIG. The sine wave indicated by dotted line C is the speed of the linear synchronous machine shown in FIG. 1 provided with iron pieces 41 and 42. The dimensions of the linear synchronous machine for which these values were obtained are as follows: pole pitch of field 2; T = 100 mm; dimension A in the moving direction of iron pieces 41 and 42 = 120 mm; and angle of inclination θ = 10°. Other introductions are the same as the conventional linear synchronous machine shown in FIG.
【００１５】図２から分かるように、鉄片４１，４２を
設けることによって速度の変動成分は従来のリニア同期
機に比べて約３分の１に低下している。寸法Ａや角度θ
を数種類変えた条件で求めた結果から、前述の緒言が最
適に近い条件であることが分かっている。すなわち、寸
法Ａが小さすぎると鉄片４１，４２を設ける効果が期待
できない。また、寸法Ａを大きくし過ぎるのはリニア同
期機の移動方向の長さ寸法を増大させるという問題が生
ずるとともに、寸法に対応した大きな効果を得ることは
できないので、結局界磁２の極ピッチＴより少し大きい
程度が妥当という結論になった。また、角度θを大きく
し過ぎるのも鉄片４１，４２を設ける効果が小さくなり
、零にすると設けないのと同じになる。５°ピッチで最
適条件を求めた結果が前述の１０°である。As can be seen from FIG. 2, by providing the iron pieces 41 and 42, the speed fluctuation component is reduced to about one third compared to the conventional linear synchronous machine. Dimension A and angle θ
From the results obtained under several different conditions, it has been found that the conditions described above are close to optimal. That is, if the dimension A is too small, the effect of providing the iron pieces 41 and 42 cannot be expected. Furthermore, if the dimension A is made too large, there will be a problem of increasing the length dimension in the moving direction of the linear synchronous machine, and it will not be possible to obtain a large effect corresponding to the dimension, so in the end, the pole pitch T of field 2 It was concluded that a slightly larger degree is appropriate. Furthermore, if the angle θ is too large, the effect of providing the iron pieces 41 and 42 will be reduced, and if the angle θ is set to zero, it will be the same as not providing the iron pieces. The above-mentioned 10° is the result of finding the optimum condition at a pitch of 5°.
【００１６】図３は図１の電機子１の左右端を拡大しそ
の漏れ磁束分布を追記した断面図であり、構造的には図
１と同様なので、図９と同様断面のハッチ及び符号の記
載を省略してある。この図において、電機子鉄心１１の
両端面と界磁鉄心２１との間に生ずる漏れ磁束ΦＬ 、
ΦＲ を磁束線で示してあるが、この漏れ磁束ΦＬ 、
ΦＲ は鉄片４１，４２の界磁２に対向する面から主に
漏れ出しているが、この面はθの角度を持っているので
漏れ磁束の漏れ出す方向も界磁２の方向に対してθの角
度を持っており、これによる磁気力ＦＲ ，ＦＬ も同
様にθの角度になっている。推進力として働く成分はこ
の磁気力ＦＲ ，ＦＬ の図の左右の方向成分であるＦ
ＲＡ，ＦＬＡとなる。これらはＦＲ ，ＦＬ 及びθと
の間に次式の関係がある。FIG. 3 is an enlarged cross-sectional view of the left and right ends of the armature 1 in FIG. 1, with the leakage flux distribution added thereto. Since the structure is the same as that in FIG. 1, the cross-sectional hatches and symbols are similar to those in FIG. Description has been omitted. In this figure, leakage magnetic flux ΦL generated between both end faces of armature core 11 and field core 21,
ΦR is shown as a magnetic flux line, but this leakage magnetic flux ΦL,
ΦR mainly leaks from the surface of the iron pieces 41 and 42 that faces the field 2, but since this surface has an angle of θ, the leaking direction of the leakage flux is also θ with respect to the direction of the field 2. The magnetic forces FR and FL caused by this also have an angle of θ. The component that acts as a propulsive force is F, which is the left and right direction component of the magnetic force FR, FL in the diagram.
They become RA and FLA. These have the following relationship with FR, FL, and θ.
【００１７】ＦＲＡ＝ＦＲ ｓｉｎ θ， ＦＬＡ＝
ＦＬ ｓｉｎ θこれらの差としての推進力の変動成分
ΔＦＡ は、ΔＦＡ ＝ＦＲＡ−ＦＬＡ＝（ＦＲ −Ｆ
Ｌ ）ｓｉｎ θとなる。[0017]FRA=FR sin θ, FLA=
FL sin θ The fluctuation component ΔFA of the propulsive force as the difference between these is ΔFA = FRA - FLA = (FR - F
L) sin θ.
【００１８】この式によればθ＝０にすると推進力の変
動成分ΔＦＡ は左右の磁気力ＦＲ ，ＦＬ の如何に
係わらず零になるという結果になるが、実際にはこの図
に示さない漏れ磁束があり、この影響でθ＝０のときは
かっえて変動成分ΔＦＡ は大きくなるという結果にな
る。したがって、前述の式は説明だけのためのものであ
って実際の変動成分ΔＦＡの計算には磁場解析が必要で
ある。According to this formula, when θ=0, the fluctuation component ΔFA of the propulsive force becomes zero regardless of the left and right magnetic forces FR and FL, but in reality there is a leakage that is not shown in this figure. There is a magnetic flux, and due to this influence, when θ=0, the fluctuation component ΔFA becomes even larger. Therefore, the above equation is for explanation only, and magnetic field analysis is required to actually calculate the fluctuation component ΔFA.
【００１９】図４は磁場解析によって算出した推進力の
変化を示すグラフである。この図において、横軸は電機
子１と界磁２との相対位置を表す寸法であり変動成分が
零になる位置を原点にとってある。変動分は界磁２の極
間寸法Ｔを周期とした変化をするので横軸の範囲をこの
極間寸法Ｔとしている。なお、図２、図８の周期τはこ
の極間寸法Ｔを速度で除した値になる。縦軸は推進力の
変動分ΔＦＡ である。また、鎖線Ｄは図６の、実線Ｅ
は図１の場合である。なお、縦軸の目盛りは実線Ｅの最
大値を１として目盛ってある。この図から明らかなよう
に鎖線Ｄの最大値は約３であり、このことは推進力変動
分ΔＦＡ が従来の技術である図６に比べてこの発明の
実施例である図１の方が３分の１に低減されたことを表
している。推進力変動分が３分の１に低減することによ
り図２の速度変動分も同じ割合で減少することになる。
なお、低減効果としての３分の１という値は条件によっ
て変化するものであり、条件によっては更に大きな低減
効果が期待できるが、別の条件ではより小さな効果しか
得られない場合もある。FIG. 4 is a graph showing changes in propulsive force calculated by magnetic field analysis. In this figure, the horizontal axis is a dimension representing the relative position of the armature 1 and the field 2, and the origin is the position where the fluctuation component is zero. Since the variation changes with the cycle of the distance between poles T of the field 2, the range of the horizontal axis is defined as the distance between poles T. Note that the period τ in FIGS. 2 and 8 is the value obtained by dividing the distance T between the poles by the speed. The vertical axis is the variation in propulsive force ΔFA. Also, the chain line D is the solid line E in FIG.
is the case in FIG. Note that the scale on the vertical axis is set with the maximum value of the solid line E as 1. As is clear from this figure, the maximum value of the dashed line D is about 3, which means that the propulsive force variation ΔFA is 3 more in FIG. 1, which is an embodiment of the present invention, than in FIG. This means that it has been reduced to one-fold. By reducing the propulsive force variation to one-third, the speed variation shown in FIG. 2 is also reduced at the same rate. Note that the value of 1/3 as the reduction effect changes depending on the conditions, and a larger reduction effect can be expected depending on the conditions, but a smaller effect may be obtained under other conditions.
【００２０】図５はこの発明の別の実施例を示す電機子
の断面図であり、界磁２は図１と同じなので電機子鉄心
１１Ａと対向する面の位置だけを図示してある。この図
において、電機子鉄心１１Ａは両端近傍の複数本の歯１
４Ａを斜めに切り欠いて角度θの傾斜を持たせた構成と
したものである。その他の構成は図１の電機子鉄心１１
と同じであり、電機子巻線１２は共通である。一般にリ
ニア同期機の電機子巻線１２は回転機の電機子巻線と同
様に亀の子又は波状に形成されたコイルの往路導体と復
路導体とがそれぞれ約１極ピッチ離れた位置のスロット
１３Ａに挿入され、１つのスロット１３Ａには異なるコ
イルの往路と復路の導体２本の導体が挿入される。FIG. 5 is a sectional view of an armature showing another embodiment of the present invention. Since the field 2 is the same as that in FIG. 1, only the position of the surface facing the armature core 11A is shown. In this figure, the armature core 11A has a plurality of teeth 1 near both ends.
4A is cut out diagonally to give an inclination of an angle θ. The other configuration is the armature core 11 in Figure 1.
, and the armature winding 12 is common. In general, the armature winding 12 of a linear synchronous machine is formed into a tortoise-like or wavy shape, similar to the armature winding of a rotating machine.The outgoing conductor and the incoming conductor of the coil are each placed in a slot 13A at a position approximately one pole pitch apart. Two conductors for the outgoing and return paths of different coils are inserted into one slot 13A.
【００２１】リニア同期機の特徴として両端部では一方
が往路のコイル導体がなく、他方が復路のコイルがない
ために１本のコイル導体だけが挿入されるスロットがそ
れぞれ約１極ピッチ分存在する。このことは図６や図１
では無視ているが、図５では概略的に示してある。この
電機子鉄心１１Ａの両端部に１本のコイル導体しか挿入
されない１つのスロット１３Ａの存在を利用して前述の
傾斜を設けたものである。このように、電機子鉄心１１
Ａに傾斜部を設けて界磁２との間の空隙１５Ａが外側に
向かって徐々に大きくなる構成を採用することによって
も前述の鉄片４１，４２を設けたのと同じように推進力
の変動を低減することができる。この構成の場合は、電
機子鉄心１１Ａの移動方向の寸法Ｌは図６の従来の電機
子鉄心１１のそれと同じなので、この発明を適用したた
めに電機子１Ａの寸法が増大することはないという利点
がある。[0021] A feature of the linear synchronous machine is that at both ends, one has no outgoing coil conductor and the other has no incoming coil, so there are slots corresponding to approximately one pole pitch each into which only one coil conductor is inserted. . This can be seen in Figures 6 and 1.
Although this is ignored in FIG. 5, it is schematically shown in FIG. The above-mentioned inclination is provided by utilizing the presence of one slot 13A in which only one coil conductor is inserted at both ends of the armature core 11A. In this way, the armature core 11
By providing an inclined portion in A and adopting a configuration in which the air gap 15A between it and the field 2 gradually increases toward the outside, fluctuations in the propulsion force can be reduced in the same way as by providing the iron pieces 41 and 42 described above. can be reduced. In the case of this configuration, the dimension L of the armature core 11A in the moving direction is the same as that of the conventional armature core 11 shown in FIG. 6, so the advantage is that the dimension of the armature 1A does not increase due to the application of this invention. There is.
【００２２】図５では歯１４Ａの界磁２側の先端も角度
θの傾斜で切り欠いた形状を示してあるが、切り欠きの
角度は零にして歯１４Ａの突出長さだけ外側程短くする
ことでも同じ効果を得ることができる。また、このよう
な傾斜部を設けた電機子鉄心１１Ａに図１の鉄片４１，
４２を設ける構成を採用することができる。この場合に
は電機子鉄心１１Ａの傾斜部と鉄片４１，４２の傾斜部
とが実質的に連続するように構成する。このように２つ
の実施例を併用することによって、コイル導体が１本挿
入されるスロットだけを利用すると必要とする傾斜部の
移動方向の長さＡが確保できないときに、電機子の移動
方向の寸法の増大を小さくしてしかも傾斜部の寸法を確
保することができる。FIG. 5 shows a shape in which the tip of the tooth 14A on the field 2 side is also notched at an angle θ, but the angle of the notch is zero and the length of the tooth 14A is shortened toward the outside by the protruding length. You can also get the same effect. In addition, the armature core 11A provided with such an inclined portion is provided with the iron piece 41 of FIG.
42 can be adopted. In this case, the inclined portion of the armature core 11A and the inclined portions of the iron pieces 41 and 42 are configured to be substantially continuous. By using these two embodiments together, when the required length A in the direction of movement of the inclined part cannot be secured by using only the slot into which one coil conductor is inserted, the length A in the direction of movement of the armature can be secured. The size of the inclined portion can be secured while reducing the increase in size.
【００２３】なお、図１の初めの実施例では傾斜部を鉄
片４１，４２で構成したが、これの代わりに電機子鉄心
１１の形状を鉄片４１，４２をも含む断面形状にして傾
斜部を電機子鉄心で構成することも可能である。この場
合も図５の傾斜部の構成との併用は可能である。このよ
うに鉄片を設けない構成による実施例では電機子鉄心の
形状が複雑になるが鉄片の取付けが不要になって電機子
鉄心を取り巻く周辺の構成が簡単になるという利点があ
る。Note that in the first embodiment shown in FIG. 1, the inclined portion was constructed of the iron pieces 41 and 42, but instead of this, the shape of the armature core 11 is made to have a cross-sectional shape that also includes the iron pieces 41 and 42, and the inclined portion is made up of iron pieces 41 and 42. It is also possible to configure it with an armature core. In this case as well, it is possible to use the structure of the inclined portion shown in FIG. 5 together. In the embodiment in which no iron pieces are provided, the shape of the armature core becomes complicated, but there is an advantage that the installation of iron pieces becomes unnecessary and the surrounding structure surrounding the armature iron core becomes simpler.
【００２４】[0024]
【発明の効果】この発明は前述のように、電機子鉄心の
両端部に、界磁との間の空隙寸法が外側に向かって所定
の角度で増大する傾斜部を設けることによって、電機子
鉄心の端部に発生する漏れ磁場による両端の電磁力の差
である推進力の変動分が減少するので、電機子が移動す
ることによる推進力の時間的変動、これによる速度の変
動が低下し、このリニア同期機を直線往復動シミュレー
タに使用した場合に乗員に与える不快感が低減し、荷物
を搬送する搬送装置に使用した場合には荷物の損傷の危
険性が低下するなどの効果が得られる。また、傾斜部を
鉄片で構成することにより、電機子鉄心の構成、寸法を
変更する必要がないとともに鉄片に安価な鋼材を使用す
ることができることからこの発明を適用する上での価格
の上昇を低減することができる。また、また、鉄片をＬ
字形断面にして、一方の辺を電機子鉄心の端面に取付け
ることによってボルト締めなどの方法で容易に取付けが
可能であり、他方の辺を界磁に対して傾斜を設けること
により傾斜部を容易に形成することができる。又は、電
機子鉄心の界磁に対向する側に並べて設けられている歯
の突出寸法を外側に近いほど小さくすることによって傾
斜部を形成することによって、電機子の移動方向寸法が
従来と同じにすることができる。また、電機子鉄心の両
端部を移動方向にそれぞれ突出させた形状とし、この突
出部で傾斜部を形成することにより鉄片を取付ける必要
がなくなる。更に、電機子鉄心の歯を切り欠いて形成す
る傾斜部と鉄片又は電機子鉄心の突出部が形成する傾斜
部とを実質的に１つの傾斜部を形成するように構成する
ことにより、必要とする傾斜部の移動方向寸法を確保し
てしかも電機子の移動方向寸法の増大を最小限にするこ
とができるという効果が得られる。Effects of the Invention As described above, the present invention provides sloped portions at both ends of the armature core in which the gap size between the armature core and the field magnet increases at a predetermined angle toward the outside. The fluctuation in the propulsive force, which is the difference between the electromagnetic force at both ends due to the leakage magnetic field generated at the end of the armature, is reduced, so the temporal fluctuation in the propulsive force due to armature movement and the resulting speed fluctuation are reduced. When this linear synchronous machine is used in a linear reciprocating motion simulator, it reduces the discomfort caused to passengers, and when used in a transport device that transports cargo, it reduces the risk of damage to the cargo. . Furthermore, by constructing the inclined portion with a piece of iron, there is no need to change the configuration or dimensions of the armature core, and an inexpensive steel material can be used for the piece of iron, which reduces the cost increase when applying this invention. can be reduced. Also, the iron piece L
By making the cross section into a shape and attaching one side to the end face of the armature core, it can be easily installed using methods such as bolt tightening, and by making the other side inclined with respect to the field, it is easy to attach the inclined part. can be formed into Alternatively, the dimensions of the armature in the moving direction can be kept the same as before by forming an inclined part by making the protruding dimensions of the teeth arranged on the side facing the field of the armature core smaller toward the outside. can do. Furthermore, by forming both ends of the armature core in a shape that projects in the direction of movement, and forming an inclined part with the projecting parts, there is no need to attach iron pieces. Furthermore, by configuring the inclined part formed by cutting out the teeth of the armature core and the inclined part formed by the iron piece or the protruding part of the armature core to substantially form one inclined part, the necessary It is possible to secure the dimension of the inclined portion in the direction of movement, and to minimize the increase in the dimension of the armature in the direction of movement.
【図１】この発明の実施例を示すリニア同期機の断面図
[Fig. 1] A cross-sectional view of a linear synchronous machine showing an embodiment of the present invention.
【図２】図１のリニア同期機の速度の時間変動を示すグ
ラフ[Figure 2] Graph showing time fluctuations in speed of the linear synchronous machine in Figure 1
【図３】図１の電機子の左右端を拡大しその漏れ磁束分
布を追記した断面図[Figure 3] Cross-sectional view of the left and right ends of the armature in Figure 1 enlarged and the leakage flux distribution added.
【図４】図１及び図６のリニア同期機の推進力の時間変
化の解析結果を示すグラフ[Fig. 4] Graph showing the analysis results of temporal changes in the propulsive force of the linear synchronous machine shown in Figs. 1 and 6
【図５】この発明の別の実施例を示す電機子の断面図[Fig. 5] A sectional view of an armature showing another embodiment of the present invention.
【
図６】従来のリニア同期機の断面図[
Figure 6: Cross-sectional view of a conventional linear synchronous machine
【図７】図６のＡ−Ａ断面図[Figure 7] A-A sectional view in Figure 6
【図８】電機子の速度の時間変動の一例を示すグラフ[Figure 8] Graph showing an example of time variation in armature speed
【
図９】図６の電機子の左右端を拡大しその漏れ磁束分布
を追記した断面図[
Figure 9: Cross-sectional view of the left and right ends of the armature in Figure 6, with the leakage flux distribution added.
１ 電機子 １１ 電機子鉄心 １１Ａ 電機子鉄心 １２ 電機子巻線 １３ スロット １３Ａ スロット １４ 歯 １４Ａ 歯 １５ 空隙 １５Ａ 空隙 ２ 界磁 ２１ 界磁鉄心 ２２ 界磁巻線 ２３ 界磁極 ２４ 継鉄 ４１ 鉄片 ４２ 鉄片 1 Armature 11 Armature core 11A Armature core 12 Armature winding 13 Slot 13A slot 14 Teeth 14A Teeth １５ Void 15A void 2 Field magnet 21 Field core 22 Field winding 23 Field pole 24 Yoke 41 Iron piece 42 Iron piece
Claims (6)
と対向して固定して配置された界磁からなるリニア同期
機において、前記電機子の鉄心である電機子鉄心の移動
方向の前端と後端の両端部に、前記界磁との間の空隙寸
法が外側に向かって所定の角度で増大する傾斜部を設け
てなることを特徴とするリニア同期機。Claims: 1. A linear synchronous machine comprising an armature attached to a movable body and a field fixedly disposed opposite to the armature, in which the direction of movement of the armature core, which is the core of the armature, is 1. A linear synchronous machine, characterized in that sloped portions are provided at both front and rear end portions, in which the gap size between the field and the magnetic field increases outwardly at a predetermined angle.
向かって増大する傾斜を持つ鉄片からなり、この鉄片を
電機子鉄心の両端面に取付けてなることを特徴とことを
特徴とする請求項１記載のリニア同期機。[Claim 2] The inclined part is made of an iron piece having a slope in which the gap size between the field magnet and the magnetic field increases toward the outside, and the iron piece is attached to both end faces of the armature core. The linear synchronous machine according to claim 1, characterized in that:
辺が電機子鉄心の移動方向の前端と後端の両端面に取付
けられ、他方の辺が界磁に対して傾斜が設けられてなる
ことを特徴とする請求項２記載のリニア同期機。Claim 3: The iron piece has an L-shaped cross section, one side of the L shape is attached to both end faces of the front end and rear end in the moving direction of the armature core, and the other side is inclined with respect to the field. 3. The linear synchronous machine according to claim 2, further comprising a linear synchronous machine.
なり、前期電機子鉄心の界磁に対向する側に並べて設け
られている歯の突出寸法を外側に近いほど小さくしてな
る傾斜部を形成してなることを特徴とする請求項１記載
のリニア同期機。[Claim 4] The armature core has inclined portions near both ends, and the protruding dimensions of the teeth arranged on the side facing the field of the armature core are made smaller toward the outside. 2. The linear synchronous machine according to claim 1, further comprising an inclined portion.
突出し、この突出部の界磁と対向する面が傾斜部を形成
してなることを特徴とする請求項１記載のリニア同期機
。5. The linear synchronous machine according to claim 1, wherein both ends of the armature core protrude in the direction of movement, and a surface of the protrusion facing the field forms an inclined part.
は電機子鉄心の突出部が形成する傾斜部とが実質的に１
つの傾斜部を形成してなることを特徴とする請求項２、
３又は５と、４とを併用してなることを特徴とする請求
項１記載のリニア同期機。6. The inclined portion formed by cutting out the teeth and the inclined portion formed by the protruding portion of the iron piece or the armature core are substantially equal to each other.
Claim 2, characterized in that two inclined parts are formed.
2. The linear synchronous machine according to claim 1, wherein the linear synchronous machine comprises a combination of 3 or 5 and 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3764791A JPH04281359A (en) | 1991-03-05 | 1991-03-05 | Linear synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3764791A JPH04281359A (en) | 1991-03-05 | 1991-03-05 | Linear synchronous machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04281359A true JPH04281359A (en) | 1992-10-06 |
Family
ID=12503446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3764791A Pending JPH04281359A (en) | 1991-03-05 | 1991-03-05 | Linear synchronous machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04281359A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000001059A1 (en) * | 1998-06-29 | 2000-01-06 | Siemens Aktiengesellschaft | Linear synchronous motor |
| WO2001080408A1 (en) * | 2000-04-19 | 2001-10-25 | Kabushiki Kaisha Yaskawa Denki | Permanent magnet synchronous linear motor |
| JP2003518358A (en) * | 1999-12-22 | 2003-06-03 | エービービー アクチボラゲット | Device with combustion engine, use of the device and vehicle |
| EP1507329A1 (en) * | 2003-08-14 | 2005-02-16 | Inventio Ag | Electric motor, lift with a car moved with an electric motor and lift with a car and an electric motor for actuating a guide member relatively to the car |
| EP1511164A3 (en) * | 2003-08-29 | 2005-12-07 | Sanyo Denki Co., Ltd. | Linear motor with reduced cogging force |
| FR2882868A1 (en) * | 2005-03-02 | 2006-09-08 | Ssd Parvex S A S | Linear synchronous motor, has two end teeth with profiled surface having geometry defined by specific function, where each tooth has longitudinal section part forming constant air gap with inductor and another part having specific width |
| EP1921735A2 (en) * | 2006-11-09 | 2008-05-14 | Alois Jenny | Iron-containing linear motor with reduced cogging and high power density |
| EP2149971A1 (en) | 2008-07-29 | 2010-02-03 | Siemens Aktiengesellschaft | Rotating linear drive device with soft magnetic element for stabilising the rotor |
| US7768158B2 (en) * | 2006-06-26 | 2010-08-03 | Hitachi, Ltd. | Cylindrical linear motor and a vehicle using the same |
| CN105071574A (en) * | 2015-08-17 | 2015-11-18 | 成都茂源科技有限公司 | High-speed polyphase electrically-excitated synchronous linear motor |
-
1991
- 1991-03-05 JP JP3764791A patent/JPH04281359A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000001059A1 (en) * | 1998-06-29 | 2000-01-06 | Siemens Aktiengesellschaft | Linear synchronous motor |
| US6713899B1 (en) | 1998-06-29 | 2004-03-30 | Siemens Aktiengesellschaft | Linear synchronous motor |
| JP2003518358A (en) * | 1999-12-22 | 2003-06-03 | エービービー アクチボラゲット | Device with combustion engine, use of the device and vehicle |
| WO2001080408A1 (en) * | 2000-04-19 | 2001-10-25 | Kabushiki Kaisha Yaskawa Denki | Permanent magnet synchronous linear motor |
| US6831379B2 (en) | 2000-04-19 | 2004-12-14 | Kabushiki Kaisha Yaskawa Denki | Permanent magnet synchronous linear motor |
| EP1507329A1 (en) * | 2003-08-14 | 2005-02-16 | Inventio Ag | Electric motor, lift with a car moved with an electric motor and lift with a car and an electric motor for actuating a guide member relatively to the car |
| EP1511164A3 (en) * | 2003-08-29 | 2005-12-07 | Sanyo Denki Co., Ltd. | Linear motor with reduced cogging force |
| FR2882868A1 (en) * | 2005-03-02 | 2006-09-08 | Ssd Parvex S A S | Linear synchronous motor, has two end teeth with profiled surface having geometry defined by specific function, where each tooth has longitudinal section part forming constant air gap with inductor and another part having specific width |
| US7768158B2 (en) * | 2006-06-26 | 2010-08-03 | Hitachi, Ltd. | Cylindrical linear motor and a vehicle using the same |
| EP1921735A2 (en) * | 2006-11-09 | 2008-05-14 | Alois Jenny | Iron-containing linear motor with reduced cogging and high power density |
| EP1921735A3 (en) * | 2006-11-09 | 2015-03-18 | Alois Jenny | Iron-containing linear motor with reduced cogging and high power density |
| EP2149971A1 (en) | 2008-07-29 | 2010-02-03 | Siemens Aktiengesellschaft | Rotating linear drive device with soft magnetic element for stabilising the rotor |
| CN105071574A (en) * | 2015-08-17 | 2015-11-18 | 成都茂源科技有限公司 | High-speed polyphase electrically-excitated synchronous linear motor |
| CN105071574B (en) * | 2015-08-17 | 2017-07-11 | 成都茂源科技有限公司 | A kind of high speed multiphase electrical excitation linear synchronous motor |
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