JPH10164779A - Axial gap synchronous machine - Google Patents
Axial gap synchronous machineInfo
- Publication number
- JPH10164779A JPH10164779A JP31440196A JP31440196A JPH10164779A JP H10164779 A JPH10164779 A JP H10164779A JP 31440196 A JP31440196 A JP 31440196A JP 31440196 A JP31440196 A JP 31440196A JP H10164779 A JPH10164779 A JP H10164779A
- Authority
- JP
- Japan
- Prior art keywords
- diameter side
- slot
- skew
- iron core
- gap
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
Landscapes
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、軸方向に空隙を
持つ同期電動機および同期発電機に関する。The present invention relates to a synchronous motor and a synchronous generator having a gap in an axial direction.
【０００２】[0002]
【従来の技術】軸方向に空隙を持つ同期電動機（以降ア
クシャルギャップモータと略す）および同期発電機（以
降アクシャルギャップ発電機と略し、両者を合わせてア
クシャルギャップ同期機と略す）は、通常の径方向に空
隙を持つ同期機（以降通常機と略す）と同様に、固定子
鉄心のスロットは場所によらず一様の形状で加工されて
いる。図２は、一般的な永久磁石界磁のアクシャルギャ
ップモータおよびアクシャルギャップ発電機の固定子構
造と回転子構造を示している。１は固定子鉄心、２は回
転子鉄心、３は永久磁石である。ただし、固定子巻線は
省略しており、またこの図では固定子鉄心は片方しか描
かれていないが、実際は回転子を両側から固定子鉄心が
挟む構成となっている。図３（ａ）は、アクシャルギャ
ップ同期機の固定子鉄心の積層方向を示しており、４は
鉄心非積層方向（周方向）、５は鉄心積層方向（径方
向）である。（ｂ）は通常機の固定子鉄心の積層方向を
示しており、６は鉄心非積層方向（周方向）、７は鉄心
積層方向（軸方向）である。図４は従来の固定子鉄心の
スロット形状について、（ａ）は内径側から見たスロッ
ト形状を、（ｂ）は外径側から見たスロット形状を、
（ｃ）は磁石径側から見たスロット形状を示している。2. Description of the Related Art A synchronous motor having a gap in the axial direction (hereinafter abbreviated as an axial gap motor) and a synchronous generator (hereinafter abbreviated as an axial gap generator, both of which are abbreviated as an axial gap synchronous machine) are: Like a synchronous machine having a normal radial gap (hereinafter abbreviated as a normal machine), the slots of the stator core are machined in a uniform shape regardless of the location. FIG. 2 shows a stator structure and a rotor structure of a general permanent magnet field axial gap motor and an axial gap generator. 1 is a stator core, 2 is a rotor core, and 3 is a permanent magnet. However, the stator windings are omitted, and although only one stator core is shown in this drawing, the rotor is actually sandwiched between the stator cores from both sides. FIG. 3A shows the lamination direction of the stator core of the axial gap synchronous machine, where 4 is the core non-lamination direction (circumferential direction), and 5 is the iron core lamination direction (radial direction). (B) shows the lamination direction of the stator core of the normal machine, 6 is the core non-lamination direction (circumferential direction), and 7 is the core lamination direction (axial direction). FIGS. 4A and 4B show the slot shape of the conventional stator core when viewed from the inner diameter side, and FIG. 4B shows the slot shape when viewed from the outer diameter side.
(C) shows the slot shape viewed from the magnet diameter side.
【０００３】また、スロットリップルによる誘起電圧の
高調波を抑える手段として、またコギングトルクを低減
する手段として、固定子スキューまたは回転子スキュー
を用いることがある。このスキューを施す場合、通常あ
る一定のスキュー角度をもって固定子スロットまたは回
転子鉄心形状（永久磁石機の場合は永久磁石形状）を斜
めに直線状に加工する。図５は、４極の永久磁石アクシ
ャルギャップモータの回転子を示しており（２極分）、
２は回転子鉄心、３は永久磁石である。（ａ）はスキュ
ーしない場合であり、（ｂ）は通常機と同様に、スキュ
ー角が一定の回転子スキューを設けた場合を示してい
る。In some cases, a stator skew or a rotor skew is used as means for suppressing harmonics of an induced voltage due to slot ripples and for reducing cogging torque. When this skew is applied, the stator slot or rotor core shape (permanent magnet shape in the case of a permanent magnet machine) is usually processed obliquely and linearly at a certain skew angle. FIG. 5 shows a rotor of a 4-pole permanent magnet axial gap motor (for 2 poles).
2 is a rotor core and 3 is a permanent magnet. (A) shows the case where there is no skew, and (b) shows the case where a rotor skew having a constant skew angle is provided as in the case of the normal machine.
【０００４】また、回転子上に界磁用の永久磁石を持つ
可変速制御されるアクシャルギャップモータは、通常そ
の空隙長は固定である。A variable speed controlled axial gap motor having a permanent magnet for a field on a rotor usually has a fixed air gap length.
【０００５】[0005]
【発明が解決しようとする課題】通常機と同様の一様形
状のスロットをアクシャルギャップモータやアクシャル
ギャップ発電機に用いた場合、固定子鉄心歯部では磁束
密度が内径側が高く外径側が低く、また継鉄部では磁束
密度が外径側が高く内径側が低くなり、磁気的なアンバ
ランスが生じる。通常機では、このアンバランスは原理
的に生じないため、鉄心積層方向（軸方向）の磁束は存
在しない。アクシャルギャップ同期機では、一般的に固
定子鉄心はバームクーヘン状に径方向に積層される。し
たがって、前述の磁気的アンバランスにより、鉄心積層
方向（径方向）の磁束が存在する。鉄心が全領域におい
て非飽和領域で使われているならば、鉄心の積層方向
（径方向）の磁気抵抗は、非積層方向（軸方向および周
方向）の磁気抵抗よりはるかに大きいため、積層方向
（径方向）の磁束は存在してもその大きさが非常に小さ
いため、問題とはならない。しかし、鉄心が局部的にで
も飽和していると、その部分の鉄心非積層方向（軸方向
および周方向）の磁気抵抗が大きくなり、積層方向（径
方向）の磁気抵抗との差が小さくなって、積層方向（径
方向）の磁束が増大する。この磁束は局部的にでも大き
なうず電流損失を発生させ、局部加熱あるいは局部変形
が起こる可能性がある。これを避けるためには、固定子
鉄心歯部および継鉄部の磁束密度を低くし、鉄心が局部
的にでも飽和しないように設定しなければならない。し
たがって、鉄心が有効利用されない部分が多くなり、機
械寸法が大きくなってしまうという問題があった。When a slot having a uniform shape similar to that of a normal machine is used in an axial gap motor or an axial gap generator, the magnetic flux density of the stator core teeth is higher on the inner diameter side and higher on the outer diameter side. In the yoke portion, the magnetic flux density is higher on the outer diameter side and lower on the inner diameter side, and magnetic unbalance occurs. In an ordinary machine, since this imbalance does not occur in principle, there is no magnetic flux in the core lamination direction (axial direction). In an axial gap synchronous machine, generally, a stator core is radially stacked in a Baumkuchen shape. Therefore, a magnetic flux exists in the core lamination direction (radial direction) due to the magnetic imbalance described above. If the core is used in the non-saturated region in all regions, the magnetic resistance in the stacking direction (radial direction) of the core is much larger than the magnetic resistance in the non-stacking direction (axial and circumferential directions). Even if the (radial) magnetic flux exists, its magnitude is very small, so that it does not pose a problem. However, when the core is saturated even locally, the magnetic resistance in the non-stacking direction (axial and circumferential directions) of the core increases, and the difference from the magnetic resistance in the stacking direction (radial direction) decreases. Thus, the magnetic flux in the laminating direction (radial direction) increases. This magnetic flux causes a large eddy current loss even locally, and local heating or local deformation may occur. In order to avoid this, the magnetic flux density of the stator core teeth and the yoke must be reduced so that the core is not saturated even locally. Therefore, there is a problem in that the portion where the iron core is not effectively used increases, and the mechanical dimensions increase.
【０００６】また、アクシャルギャップ同期機で、通常
機と同様に、ある一定のスキュー角をもってスキューを
施した場合、固定子巻線１本に誘起する電圧は、巻線の
内径側から外径側にかけて一様ではない。内径側から外
径側にかけて磁束密度が一定の場合、内径側と外径側で
は固定子と回転子の相対速度が違うため、巻線に誘起さ
れる電圧の分布は、位置の軸中心からの距離に比例した
ものとなる。次にコギングトルクは、内径側から外径側
にかけて磁気吸引力の周方向成分が一定の場合、トルク
の分布としては軸中心からの距離に比例したものとな
る。したがって、ある一定のスキュー角をもってスキュ
ーを施した場合、スロットリップルによる誘起電圧の高
調波およびコギングトルクは、通常機とは異なり原理的
には消すことはできないという問題があった。Further, when a skew is performed with a certain skew angle in an axial gap synchronous machine as in a normal machine, the voltage induced in one stator winding is changed from the inner diameter side of the winding to the outer diameter. Not uniform on the sides. When the magnetic flux density is constant from the inner diameter side to the outer diameter side, the relative speed between the stator and the rotor is different between the inner diameter side and the outer diameter side. It is proportional to the distance. Next, when the circumferential component of the magnetic attraction force is constant from the inner diameter side to the outer diameter side, the cogging torque has a torque distribution proportional to the distance from the shaft center. Therefore, when the skew is performed at a certain skew angle, there is a problem that the harmonics of the induced voltage and the cogging torque due to the slot ripple cannot be eliminated in principle unlike a normal machine.
【０００７】また、永久磁石電動機では、界磁起磁力は
変えられないため、その回転数に比例した誘起電圧が発
生する。従って、高回転域では回転数に比例した大きな
誘起電圧が発生するため、これと同程度の電圧を印加す
る必要がある。この誘起電圧がインバータ等の電源の最
大発生可能電圧を超える場合、進相電流を強制的に流
し、界磁起磁力を減少させる弱め界磁制御が必要にな
る。この弱め界磁制御では大きな無効電力が必要である
ため、高回転域では効率が悪くなってしまうという問題
があった。Further, in a permanent magnet motor, the field magnetomotive force cannot be changed, and an induced voltage proportional to the number of revolutions is generated. Therefore, a large induced voltage proportional to the number of rotations is generated in a high rotation speed range, and it is necessary to apply a voltage similar to this. If the induced voltage exceeds the maximum voltage that can be generated by a power supply such as an inverter, a weak field control for forcibly flowing a leading current and reducing the field magnetomotive force is required. This field-weakening control requires a large amount of reactive power, and thus has a problem in that the efficiency is reduced in a high rotation speed range.
【０００８】本発明は、鉄心利用率を高くして機械寸法
の小さい、またスロットリップルによる誘起電圧の高調
波およびコギングトルクを原理的には０にすることので
きるスキュー方法により安定に動作するアクシャルギャ
ップ同期機、および高回転域でも高効率なアクシャルギ
ャップモータを提供することを目的とする。According to the present invention, there is provided an actuator which operates stably by a skew method capable of increasing the utilization factor of the iron core, reducing the mechanical size, and reducing the harmonics and cogging torque of the induced voltage due to the slot ripple to zero in principle. It is an object of the present invention to provide a char gap synchronous machine and an axial gap motor with high efficiency even in a high rotation range.
【０００９】[0009]
【課題を解決するための手段】アクシャルギャップ同期
機において、固定子鉄心の内径側では幅が狭く深さが深
いスロット形状で、外径側にいくにしたがって幅が広く
深さが浅いスロットを採用する。このようなスロット形
状を用いることにより、通常スロットを用いた場合と比
較して、歯部内径側の歯幅は大きく外径側の歯幅は小さ
くなり、継鉄部内径側では継鉄高さは小さく外径側の継
鉄高さは大きくなる。したがって、歯部では内径側の磁
束密度は小さく外径側では大きくなり、継鉄部では内径
側の磁束密度は大きく外径側では小さくなる。内径側、
外径側のスロットの幅、深さを適正な値にしてやれば、
歯部、継鉄部ともに、内外径の磁束密度を同程度にする
ことができ、磁気的なアンバランスが解消されて、局部
加熱や変形の可能性が低くなる。また、固定子鉄心全領
域において、磁束密度を飽和しない程度に大きくとるこ
とができ、結果的に固定子鉄心寸法を小さくすることが
できる。SUMMARY OF THE INVENTION In an axial gap synchronous machine, a slot having a narrow width and a deep depth is formed on the inner diameter side of the stator core, and a slot having a wider width and a shallow depth is formed toward the outer diameter side. adopt. By using such a slot shape, the tooth width on the inner diameter side of the tooth portion is larger and the tooth width on the outer diameter side is smaller than in the case of using a normal slot, and the yoke height is higher on the inner diameter side of the yoke portion. Is small and the yoke height on the outside diameter side is large. Therefore, the magnetic flux density on the inner diameter side is small at the tooth portion and becomes larger on the outer diameter side, and the magnetic flux density on the inner diameter side is large at the yoke portion and becomes smaller at the outer diameter side. Inside diameter,
If you make the width and depth of the slot on the outer diameter appropriate values,
The magnetic flux densities of the inner and outer diameters of the tooth portion and the yoke portion can be made substantially the same, the magnetic imbalance is eliminated, and the possibility of local heating and deformation is reduced. Further, the magnetic flux density can be made large so as not to saturate the entire region of the stator core, and as a result, the size of the stator core can be reduced.
【００１０】また、前述のように固定子巻線に誘起する
電圧分布は、巻線の軸中心からの距離に比例し、コギン
グトルクの分布も軸中心からの距離に比例する。したが
って、スロットリップルによる誘起電圧の高調波および
コギングトルクを低減するためのスキューは、ある半径
位置でのスキュー角が、その半径位置に比例したもので
なければならない。つまり、スキューしない場合の位置
からのスキューによる起動角を、軸中心を原点とした２
次曲線状にすることで達成できる。すなわち、図６にお
いて、θ〔ｄｅｇ〕のスキューを行う場合、スキューに
よる移動量α（Ｒ）〔ｄｅｇ〕を、α（Ｒ）＝θ×（Ｒ
2 −Ｒi 2 ）／（Ｒa 2 −Ｒi 2 ）とすることで、原理
的にはスロットリップルによる誘起電圧高調波およびコ
ギングトルクを０にすることができる。Further, as described above, the voltage distribution induced in the stator winding is proportional to the distance from the axis center of the winding, and the distribution of the cogging torque is also proportional to the distance from the axis center. Therefore, the skew for reducing the harmonics of the induced voltage due to the slot ripple and the cogging torque must be such that the skew angle at a certain radial position is proportional to the radial position. In other words, the starting angle due to skew from the position where no skew occurs is defined as 2
This can be achieved by forming a curve below. That is, in FIG. 6, when skew of θ [deg] is performed, the movement amount α (R) [deg] due to the skew is calculated by α (R) = θ × (R
By setting 2− R i 2 ) / ( Ra 2 −R i 2 ), in principle, the induced voltage harmonic and cogging torque due to the slot ripple can be reduced to zero.
【００１１】また、アクシャルギャップモータの空隙長
を回転数や負荷状態によって適切に変化させる機構を用
いる。この様な機構を用いることにより、電源の出しう
る最大電圧の範囲内の低回転域では空隙長を小さくし、
Ｖ／ｆ一定制御や、力率一定制御といった通常の制御を
行う。電源の最大電圧より大きな印加電圧が必要な高回
転域では、空隙長を大きくして界磁起磁力による磁束を
減少させ、誘起電圧自体を小さくし、この結果必要な印
加電圧値を小さくすることができる。これにより大きな
無効電圧を必要とする弱め界磁制御をしなくてよくな
り、高回転域での効率の向上を図ることができる。Further, a mechanism for appropriately changing the gap length of the axial gap motor depending on the number of rotations and the load condition is used. By using such a mechanism, the gap length is reduced in the low rotation range within the range of the maximum voltage that the power supply can output,
Normal control such as V / f constant control and power factor constant control is performed. In a high rotation range where an applied voltage higher than the maximum voltage of the power supply is required, the air gap length should be increased to reduce the magnetic flux due to the field magnetomotive force, and to reduce the induced voltage itself, thereby reducing the required applied voltage value. Can be. As a result, it is not necessary to perform the field weakening control that requires a large reactive voltage, and it is possible to improve the efficiency in a high rotation speed region.
【００１２】[0012]
【発明の実施の形態】図１は、本発明の第１の実施例の
固定子鉄心のスロット形状について、（ａ）は内径側か
ら見たスロット形状を、（ｂ）は外径側から見たスロッ
ト形状を、（ｃ）は磁石径側から見たスロット形状を示
している。内径側では細くて深く、外径にいくにしたが
って広くて浅いスロットを用いている。1A and 1B show a slot shape of a stator core according to a first embodiment of the present invention, wherein FIG. 1A shows a slot shape viewed from the inner diameter side, and FIG. 1B shows a slot shape viewed from the outer diameter side. (C) shows the slot shape viewed from the magnet diameter side. Slots that are thin and deep on the inner diameter side and wider and shallower toward the outer diameter are used.
【００１３】空隙部に一様の磁束が存在した場合、図１
と図４の（ｃ）を比べればわかるように、図４の通常ス
ロットの場合は、内径側の歯幅のスロットピッチに対す
る割合が外径側と比べて小さいために、歯の磁束密度が
内径側の方が外径側より大きくなってしまう。実際は、
空隙部の磁束密度は一様ではなく、内径側の方が外径側
より若干小さいが、それでもこれと同様のことがおき
る。これに対して図１のようなスロットを用いた場合、
内径側の歯幅のスロットピッチに対する割合は外径側と
あまり変わらないため、歯全域にわたって同程度の磁束
密度にすることが可能である。When a uniform magnetic flux exists in the air gap, FIG.
As can be seen by comparing FIG. 4C with FIG. 4C, the ratio of the tooth width on the inner diameter side to the slot pitch is smaller in the case of the normal slot in FIG. The side is larger than the outer diameter side. In fact,
The magnetic flux density in the air gap is not uniform, and the inner diameter side is slightly smaller than the outer diameter side. On the other hand, when a slot as shown in FIG. 1 is used,
Since the ratio of the tooth width on the inner diameter side to the slot pitch is not so different from that on the outer diameter side, the same magnetic flux density can be obtained over the entire tooth area.
【００１４】次に、回転子側の鉄心や永久磁石は一般的
に扇状の形状をとる。ここから固定子に流入する磁束
は、鉄心積層方向（径方向）の出入りがないものとすれ
ば、固定子継鉄部では軸中心からその径位置までの距離
に比例した磁束が通ることになる。従って、固定子継鉄
部の内径から外径で一定の磁束密度を確保しようとする
と、軸中心からの距離に比例した継鉄高さが必要とな
る。図４のような通常スロットでは、継鉄高さが一定で
あるため、継鉄外径部の磁束密度は高く内径側は低くな
ってしまう。これに対して図１のスロットを用いると、
継鉄内径部の磁束密度を上げ、外径部の磁束密度を下げ
てやることができる。Next, the iron core and the permanent magnet on the rotor side generally have a fan-like shape. Assuming that the magnetic flux flowing into the stator from here does not enter or exit in the iron core laminating direction (radial direction), the magnetic flux proportional to the distance from the axis center to the radial position passes through the stator yoke portion. . Therefore, in order to secure a constant magnetic flux density from the inner diameter to the outer diameter of the stator yoke, a yoke height proportional to the distance from the shaft center is required. In a normal slot as shown in FIG. 4, since the yoke height is constant, the magnetic flux density of the outer diameter portion of the yoke is high, and the magnetic flux density on the inner diameter side is low. On the other hand, if the slot of FIG. 1 is used,
The magnetic flux density at the inner portion of the yoke can be increased and the magnetic flux density at the outer portion can be reduced.
【００１５】図５（ｃ）は４極永久磁石アクシャルギャ
ップモータの回転子の形状（２極分）について、本発明
の第２の実施例のスキューを施した場合の形状を示す。
図７、図８は、図５の（ａ）および（ｃ）について、３
次元ＦＥＭにて解析した無負荷誘起電圧波形およびコギ
ングトルク波形である。これらの図より２次曲線状のス
キューによって、誘起電圧、コギングトルクともに大幅
に改善されることがわかる。固定子スキューの場合も回
転子スキューと同様に、図６の形で固定子スロットを加
工すればよい。FIG. 5C shows the shape of the rotor (for two poles) of the four-pole permanent magnet axial gap motor when the skew of the second embodiment of the present invention is applied.
FIGS. 7 and 8 show 3 (a) and (c) in FIG.
It is a no-load induced voltage waveform and a cogging torque waveform analyzed by a dimensional FEM. From these figures, it is understood that the induced voltage and the cogging torque are greatly improved by the quadratic curve skew. In the case of the stator skew, similarly to the rotor skew, the stator slot may be machined as shown in FIG.
【００１６】図９は、本発明の第３の実施例を示す空隙
長可変の永久磁石アクシャルギャップモータの構成図で
ある。１は固定子鉄心、２は回転子鉄心、３は永久磁石
であり、空隙長をピニオンギア８およびラックギア９に
より機械的に変えることができ、機械的な強度が十分あ
る機構であればどのようなものでもよい。FIG. 9 is a view showing the configuration of a permanent magnet axial gap motor having a variable gap length according to a third embodiment of the present invention. 1 is a stator core, 2 is a rotor core, 3 is a permanent magnet, and the gap length can be mechanically changed by the pinion gear 8 and the rack gear 9, so long as the mechanism has sufficient mechanical strength. May be something.
【００１７】[0017]
【発明の効果】固定子内径側では幅が狭く深さが深いス
ロット形状で、外径側にいくにしたがって幅が広く深さ
が浅いスロットを用いることにより、鉄心の利用率が向
上し、結果として機体寸法の小型化を図ることができる
また、スキュー量が２次曲線状のスキューを回転子また
は固定子に施すことにより、スロットリップルによる誘
起電圧の高調波とコギングトルクを実用上問題のないレ
ベルに低減することができる。According to the present invention, a slot shape having a narrow width and a deep depth is used on the inner diameter side of the stator, and a slot having a wider width and a shallower depth is used toward the outer diameter side. By applying a skew having a skew amount of a quadratic curve to the rotor or the stator, harmonics of the induced voltage due to the slot ripple and cogging torque have no practical problem. Level can be reduced.
【００１８】また、たとえばラックとピニオンとによる
空隙長可変機構を用いることにより、高回転域で弱め界
磁制御が不要な永久磁石電動機を製作することができ
る。バッテリーを電源とする場合は、最大電圧はバッテ
リーの電圧値で制限され、また弱め界磁により大きな無
効電力を供給し続けるとバッテリーの寿命も短くなるの
で、この様な場合特に有効である。Further, by using, for example, a variable air gap length mechanism using a rack and a pinion, it is possible to manufacture a permanent magnet motor that does not require field weakening control in a high rotation range. When a battery is used as a power source, the maximum voltage is limited by the voltage value of the battery, and the life of the battery is shortened if a large amount of reactive power is continuously supplied by the field weakening. This is particularly effective in such a case.
【図１】この発明の第１の実施例を示す固定子鉄心のス
ロット形状について、（ａ）は内径側より見たスロット
形状を示す図。（ｂ）は外径側より見たスロット形状を
示す図。（ｃ）は磁石径側より見たスロット形状を示す
図。FIG. 1A is a diagram showing a slot shape of a stator iron core according to a first embodiment of the present invention, in which FIG. (B) is a diagram showing a slot shape viewed from the outer diameter side. (C) is a diagram showing a slot shape viewed from the magnet diameter side.
【図２】一般的な永久磁石アクシャルギャップ同期機の
構成図。FIG. 2 is a configuration diagram of a general permanent magnet axial gap synchronous machine.
【図３】（ａ）はアクシャルギャップ同期機の固定子鉄
心の積層方向を示す図。（ｂ）は通常機の固定子鉄心の
積層方向を示す図。FIG. 3A is a diagram illustrating a stacking direction of a stator core of an axial gap synchronous machine. (B) is a figure which shows the lamination direction of the stator core of a normal machine.
【図４】従来の固定子鉄心のスロット形状について、
（ａ）は内径側より見たスロット形状を示す図。（ｂ）
は外径側より見たスロット形状を示す図。（ｃ）は磁石
径側より見たスロット形状を示す図。FIG. 4 shows a slot shape of a conventional stator core.
(A) is a figure which shows the slot shape seen from the inner diameter side. (B)
FIG. 4 is a diagram showing a slot shape as viewed from the outer diameter side. (C) is a diagram showing a slot shape viewed from the magnet diameter side.
【図５】４極永久磁石アクシャルギャップモータ回転子
の形状（２極分）について、（ａ）はスキュー無しの場
合の形状を示す図。（ｂ）は従来のスキューを設けた場
合の形状を示す図。（ｃ）は本発明の第２の実施例のス
キューを設けた場合の形状を示す図。FIG. 5A is a diagram showing a shape (for two poles) of a four-pole permanent magnet axial gap motor rotor when there is no skew; (B) is a diagram showing a shape when a conventional skew is provided. (C) is a diagram showing a shape when a skew according to the second embodiment of the present invention is provided.
【図６】図５（ｃ）の２次曲線状のスキュー説明図。FIG. 6 is a skew explanatory view of the quadratic curve of FIG. 5 (c).
【図７】ＦＥＭ解析による無負荷誘起電圧のスキュー効
果を示す図。FIG. 7 is a diagram showing a skew effect of no-load induced voltage by FEM analysis.
【図８】ＦＥＭ解析によるコギングトルクのスキュー効
果を示す図。FIG. 8 is a diagram showing a skew effect of cogging torque by FEM analysis.
【図９】本発明の第３の実施例を示す空隙長可変の永久
磁石アクシャルギャップモータの構成図。FIG. 9 is a configuration diagram of a variable gap length permanent magnet axial gap motor according to a third embodiment of the present invention.
１…固定子鉄心、２…回転子鉄心、３…永久磁石、４…
アクシャルギャップ同期機の鉄心非積層方向（周方
向）、５…アクシャルギャップ同期機の鉄心積層方向
（径方向）、６…通常機の鉄心非積層方向（周方向）、
７…通常機の鉄心積層方向（軸方向）、８…ピニオンギ
ア、９…ラックギア、１０…回転子スキューをしない場
合の無負荷誘起電圧波形、１１…２次曲線状の回転子ス
キューを施した場合の無負荷誘起電圧波形、１２…回転
子スキューをしない場合のコギングトルク波形、１３…
２次曲線状の回転子スキューを施した場合のコギングト
ルク波形。1: stator core, 2: rotor core, 3: permanent magnet, 4:
Core laminating direction of axial gap synchronous machine (circumferential direction), 5: core laminating direction of axial gap synchronous machine (radial direction), 6: core laminating direction of normal machine (circumferential direction),
7 ... lamination direction (axial direction) of normal machine, 8 ... pinion gear, 9 ... rack gear, 10 ... no-load induced voltage waveform without rotor skew, 11 ... secondary-curved rotor skew No-load induced voltage waveform in the case, 12 ... cogging torque waveform in the case of no rotor skew, 13 ...
Cogging torque waveform when a quadratic rotor skew is applied.
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０２Ｋ 21/24 Ｈ０２Ｋ 21/24 Ｇ 29/00 29/00 Ｚ Continued on the front page (51) Int.Cl. 6 Identification code FI H02K 21/24 H02K 21/24 G 29/00 29/00 Z
Claims (3)
発電機において、固定子鉄心のスロット形状が、内周側
では細くて深く、外周側にいくにしたがって広くて浅く
なることを特徴とするアクシャルギャップ同期機。In a synchronous motor and a synchronous generator having a gap in an axial direction, a slot shape of a stator core is narrow and deep on an inner peripheral side, and becomes wider and shallower toward an outer peripheral side. Axial gap synchronous machine.
発電機において、回転子または固定子のスキュー形状
が、軸中心を原点とした２次曲線状のスキュー量を持つ
ことを特徴とするアクシャルギャップ同期機。2. A synchronous motor and a synchronous generator having a gap in an axial direction, wherein a skew shape of a rotor or a stator has a skew amount in a quadratic curve centered on an axis center. Char gap synchronous machine.
転子上に持つ可変速制御される永久磁石同期電動機にお
いて、その空隙長が回転数によって変化することを特徴
とする同期電動機。3. A variable speed controlled permanent magnet synchronous motor having an axial gap and a field permanent magnet on a rotor, wherein the gap length changes according to the number of revolutions. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31440196A JPH10164779A (en) | 1996-11-26 | 1996-11-26 | Axial gap synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31440196A JPH10164779A (en) | 1996-11-26 | 1996-11-26 | Axial gap synchronous machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10164779A true JPH10164779A (en) | 1998-06-19 |
Family
ID=18052912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31440196A Withdrawn JPH10164779A (en) | 1996-11-26 | 1996-11-26 | Axial gap synchronous machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10164779A (en) |
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| JP2004509599A (en) * | 2000-09-21 | 2004-03-25 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Electric machine |
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