JP2010233308A - Synchronous motor - Google Patents

Synchronous motor Download PDF

Info

Publication number
JP2010233308A
JP2010233308A JP2009076527A JP2009076527A JP2010233308A JP 2010233308 A JP2010233308 A JP 2010233308A JP 2009076527 A JP2009076527 A JP 2009076527A JP 2009076527 A JP2009076527 A JP 2009076527A JP 2010233308 A JP2010233308 A JP 2010233308A
Authority
JP
Japan
Prior art keywords
magnetic flux
rotor
stator
synchronous motor
permanent magnet
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.)
Granted
Application number
JP2009076527A
Other languages
Japanese (ja)
Other versions
JP5556037B2 (en
Inventor
Tsutomu Tanimoto
勉 谷本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2009076527A priority Critical patent/JP5556037B2/en
Publication of JP2010233308A publication Critical patent/JP2010233308A/en
Application granted granted Critical
Publication of JP5556037B2 publication Critical patent/JP5556037B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synchronous motor that increases torque density. <P>SOLUTION: The synchronous motor 1 includes a rotor 4 having permanent magnets 5, 6, and a stator 2 supplied with a current so that a current magnetic field can be rotated. In an air gap between the rotor 4 and the stator 2, the first permanent magnets 5 produce a magnetic flux directed from the rotor 4 to the stator 2 and the second permanent magnets 6 produce a magnetic flux directed from the stator 2 to the rotor 4. The magnetic flux produced from the first permanent magnets 5 and the magnetic flux produced from the second permanent magnets 6 are different from each other in width in the direction of rotor rotation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、同期電動機に関する。   The present invention relates to a synchronous motor.

従来、トルク密度を向上させた同期電動機が知られている。この同期電動機では、固定子と回転子との空隙、又は、回転子内の空隙を円周方向に対して不均一に設け、磁石トルクが最大となる電流位相と、リラクタンストルクとが最大となる電流位相を近づけることにより、トルク密度を向上させている（例えば特許文献１及び２参照）。   Conventionally, a synchronous motor with improved torque density is known. In this synchronous motor, the gap between the stator and the rotor, or the gap in the rotor is unevenly provided in the circumferential direction, and the current phase at which the magnet torque is maximized and the reluctance torque are maximized. The torque density is improved by bringing the current phase closer (see, for example, Patent Documents 1 and 2).

特開平９−１８２３３０号公報JP-A-9-182330 特開２００４−３２９４７号公報JP 2004-32947 A

しかし、従来の同期電動機の場合、空隙が円周方向に不均一に設けられているため、回転子の回転方向、力行、及び回生によって、回転数対トルク特性が異なってしまうため、トルク密度の向上につながらない可能性があった。   However, in the case of the conventional synchronous motor, since the air gaps are unevenly provided in the circumferential direction, the rotational speed vs. torque characteristics differ depending on the rotation direction, power running, and regeneration of the rotor. There was a possibility that it did not lead to improvement.

本発明はこのような従来の課題を解決するためになされたものであり、その目的とするところは、トルク密度を向上させることが可能な同期電動機を提供することにある。   The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a synchronous motor capable of improving torque density.

本発明の同期電動機は、磁束発生部材を有する回転子と、電流磁界を回転させることができるように電流が与えられる固定子と、を備えた同期電動機であって、前記回転子と前記固定子との間の空隙において、前記回転子から前記固定子に向かう磁束を発生させるＮ極磁束発生部材と、前記固定子から前記回転子に向かう磁束を発生させるＳ極磁束発生部材と、を有し、前記Ｎ極磁束発生部材から発生する磁束の回転子回転方向の幅と、前記Ｓ極磁束発生部材から発生する磁束の回転子回転方向の幅とが異なっていることを特徴とする。   A synchronous motor according to the present invention is a synchronous motor including a rotor having a magnetic flux generation member and a stator to which a current is applied so that a current magnetic field can be rotated. The rotor and the stator An N-pole magnetic flux generating member that generates a magnetic flux from the rotor toward the stator, and an S-pole magnetic flux generating member that generates a magnetic flux from the stator toward the rotor. The width of the magnetic flux generated from the N-pole magnetic flux generation member in the rotor rotation direction is different from the width of the magnetic flux generated from the S-pole magnetic flux generation member in the rotor rotation direction.

本発明によれば、Ｎ極磁束発生部材から発生する磁束の回転子回転方向の幅と、Ｓ極磁束発生部材から発生する磁束の回転子回転方向の幅とが異なっている。このため、Ｎ極磁束発生部材から発生する磁束の回転子回転方向の幅と、Ｓ極磁束発生部材から発生する磁束の回転子回転方向の幅とが同じ場合と比較して、基本波磁束密度が高くなり、通電した際に得られるトルクが大きくなる。従って、トルク密度を向上させることができる。   According to the present invention, the width of the magnetic flux generated from the N-pole magnetic flux generation member in the rotor rotation direction is different from the width of the magnetic flux generated from the S-pole magnetic flux generation member in the rotor rotation direction. For this reason, compared with the case where the width | variety of the rotor rotation direction of the magnetic flux which generate | occur | produces from a N pole magnetic flux generation member and the width | variety of the rotor rotation direction of the magnetic flux which generate | occur | produces from a S pole magnetic flux generation member are the same, fundamental wave magnetic flux density Increases, and the torque obtained when energized increases. Therefore, torque density can be improved.

本実施形態の同期電動機を示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。It is a block diagram which shows the synchronous motor of this embodiment, and has shown the cross section when cut by the plane perpendicular | vertical with respect to the rotating shaft direction of an electric motor. 本実施形態に係る同期電動機のギャップ磁束密度波形を示すグラフである。It is a graph which shows the gap magnetic flux density waveform of the synchronous motor which concerns on this embodiment. 第１永久磁石と第２永久磁石との幅が同一の場合におけるギャップ磁束密度波形を示すグラフである。It is a graph which shows a gap magnetic flux density waveform in case the width | variety of a 1st permanent magnet and a 2nd permanent magnet is the same. 第１永久磁石と第２永久磁石との幅の比を変化させたときのギャップ磁束密度実効値を示す第１のグラフである。It is a 1st graph which shows the gap magnetic flux density effective value when changing the ratio of the width | variety of a 1st permanent magnet and a 2nd permanent magnet. 第１永久磁石と第２永久磁石との幅の比を変化させたときのギャップ磁束密度実効値を示す第２のグラフである。It is a 2nd graph which shows the gap magnetic flux density effective value when changing the ratio of the width | variety of a 1st permanent magnet and a 2nd permanent magnet. 第２実施形態に係る同期電動機を示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。It is a block diagram which shows the synchronous motor which concerns on 2nd Embodiment, and has shown the cross section when cut by the plane perpendicular | vertical with respect to the rotating shaft direction of an electric motor. 第３実施形態に係る同期電動機を示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。It is a block diagram which shows the synchronous motor which concerns on 3rd Embodiment, and has shown the cross section when cut by the plane perpendicular | vertical with respect to the rotating shaft direction of an electric motor.

以下、本発明の好適な実施形態を図面に基づいて説明する。なお、各図において同一又は同様の要素には同一の符号を付して説明を省略する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or similar element, and description is abbreviate | omitted.

図１は、本実施形態の同期電動機を示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。図１に示すように、同期電動機１は、固定子２と、固定子巻線３と、回転子４と、第１永久磁石（Ｎ極磁束発生部材）５と、第２永久磁石（Ｓ極磁束発生部材）６と、シャフト７とを備え、固定子２に電流磁界を回転させることができるように電流が与えられることにより、磁束発生部材５，６を有する回転子を回転させるものである。   FIG. 1 is a configuration diagram showing the synchronous motor of the present embodiment, and shows a cross section when cut along a plane perpendicular to the rotation axis direction of the motor. As shown in FIG. 1, the synchronous motor 1 includes a stator 2, a stator winding 3, a rotor 4, a first permanent magnet (N pole magnetic flux generating member) 5, and a second permanent magnet (S pole). The rotor having the magnetic flux generating members 5 and 6 is rotated by applying a current so that the current magnetic field can be rotated to the stator 2. .

固定子２は、磁性体の電磁鋼板が積層されて構成されたものである。固定子巻線３は、固定子２の突極部に巻回されており、通電さることにより磁束を発生させるものである。回転子４は、磁性体の電磁鋼板が積層されて構成されたものであり、固定子２とは一定の空隙だけ離れて配置され回転する構成となっている。第１永久磁石５は、回転子４のスリットに埋め込まれ、固定子２側にＮ極を有する磁石である。第２永久磁石６は、回転子４のスリットに埋め込まれ、固定子２側にＳ極を有する磁石である。シャフト７は、図示しない軸受で支持されており、回転子４と共に回転するものである。   The stator 2 is configured by laminating magnetic electromagnetic steel plates. The stator winding 3 is wound around the salient pole portion of the stator 2 and generates magnetic flux when energized. The rotor 4 is configured by laminating magnetic steel plates made of a magnetic material, and is configured to rotate by being spaced apart from the stator 2 by a certain gap. The first permanent magnet 5 is a magnet embedded in the slit of the rotor 4 and having an N pole on the stator 2 side. The second permanent magnet 6 is a magnet embedded in the slit of the rotor 4 and having an S pole on the stator 2 side. The shaft 7 is supported by a bearing (not shown) and rotates together with the rotor 4.

特に、本実施形態において第１永久磁石５の回転方向幅がｗｎであるのに対し、第２永久磁石６の回転方向幅はｗｓとなっており、異なっている。これにより、両者の磁束幅が異なることとなる。なお、ｗｎ＞ｗｓであり、両磁石５，６の磁気特性、及び半径方向と軸方向の寸法は同一である。   In particular, in the present embodiment, the rotation width of the first permanent magnet 5 is wn, whereas the rotation width of the second permanent magnet 6 is ws. Thereby, both magnetic flux width will differ. Note that wn> ws, the magnetic characteristics of both the magnets 5 and 6, and the dimensions in the radial direction and the axial direction are the same.

次に、本実施形態に係る同期電動機１のトルク密度向上について説明する。図２は、本実施形態に係る同期電動機１のギャップ磁束密度波形を示すグラフである。第１永久磁石５は第２永久磁石６と比べると幅が広いため発生する磁束も多く、その磁束が幅の狭い永久磁石６に集中して通るため、ギャップ磁束密度は永久磁石６付近の方が高くなる。このため、図２に示すように波形に隔たりが生じる。   Next, improvement in torque density of the synchronous motor 1 according to this embodiment will be described. FIG. 2 is a graph showing a gap magnetic flux density waveform of the synchronous motor 1 according to the present embodiment. Since the first permanent magnet 5 is wider than the second permanent magnet 6, a large amount of magnetic flux is generated, and since the magnetic flux concentrates and passes through the narrow permanent magnet 6, the gap magnetic flux density is closer to the permanent magnet 6. Becomes higher. For this reason, as shown in FIG.

図３は、第１永久磁石５と第２永久磁石６との幅が同一の場合におけるギャップ磁束密度波形を示すグラフである。第１永久磁石５と第２永久磁石６との幅ｗｎ，ｗｓが同一の場合、両者の永久磁石５，６が発生する磁束も同一のため、ギャップ磁束密度も両永久磁石付近で同一の波高値を示すこととなる。   FIG. 3 is a graph showing a gap magnetic flux density waveform when the widths of the first permanent magnet 5 and the second permanent magnet 6 are the same. When the widths wn and ws of the first permanent magnet 5 and the second permanent magnet 6 are the same, the magnetic fluxes generated by the permanent magnets 5 and 6 are the same, so that the gap magnetic flux density is the same in the vicinity of both permanent magnets. High value will be shown.

図４は、第１永久磁石５と第２永久磁石６との幅の比を変化させたときのギャップ磁束密度実効値を示す第１のグラフである。なお、図４に示すグラフでは、磁気飽和の影響を無視した場合の特性を示している。また、図４ではｗｎ＋ｗｓ＝Ｃ（Ｃは一定の値）をいう条件としている。第１永久磁石５と第２永久磁石６との幅ｗｎ，ｗｓを変化させた場合、第２永久磁石６の回転方向幅ｗｓに対する第１永久磁石５の回転方向幅ｗｎの比が大きくなるほど、ギャップ磁束密度実効値が高くなる傾向にある。このため、同じ実効値の電流を通電した場合、より大きなトルクを得ることができ、トルク密度やモータ効率の向上が見込める。   FIG. 4 is a first graph showing the effective value of the gap magnetic flux density when the width ratio between the first permanent magnet 5 and the second permanent magnet 6 is changed. The graph shown in FIG. 4 shows the characteristics when the influence of magnetic saturation is ignored. In FIG. 4, the condition is wn + ws = C (C is a constant value). When the widths wn and ws of the first permanent magnet 5 and the second permanent magnet 6 are changed, the ratio of the rotational direction width wn of the first permanent magnet 5 to the rotational direction width ws of the second permanent magnet 6 increases. The effective value of the gap magnetic flux density tends to increase. For this reason, when a current having the same effective value is applied, a larger torque can be obtained, and an improvement in torque density and motor efficiency can be expected.

図５は、第１永久磁石５と第２永久磁石６との幅の比を変化させたときのギャップ磁束密度実効値を示す第２のグラフである。なお、図５に示すグラフでは、磁気飽和の影響を考慮した場合の特性を示している。また、図５ではｗｎ＋ｗｓ＝Ｃ（Ｃは一定の値）をいう条件としている。図４に示したように、第２永久磁石６の回転方向幅ｗｓに対する第１永久磁石５の回転方向幅ｗｎの比が大きくなるほど、ギャップ磁束密度実効値が高くなる傾向にある。しかし、幅が短くなった方の永久磁石６付近の磁束密度が高くなるので、電磁鋼板の磁気飽和が発生してしまう。このため、電磁鋼板の飽和磁束密度以上に磁束を集中させてもギャップ磁束密度は増加せず、図５に示すように、第１永久磁石５の回転方向幅ｗｎと第２永久磁石６の回転方向幅ｗｓとの比には最適値が存在する。すなわち、Ｗｎ：Ｗｓ＝４：１程度とすることが最適といえる。このような理由から、本実施形態では、第１永久磁石５及び第２永久磁石６により発生する磁束が固定子２又は回転子４を構成する磁性体を通過する磁束密度は、磁性体の飽和磁束密度を超えないようにされている。これにより、磁気飽和による基本波磁束密度の低下を抑えることができ、より一層トルク密度を向上させることができる。   FIG. 5 is a second graph showing the effective value of the gap magnetic flux density when the ratio of the widths of the first permanent magnet 5 and the second permanent magnet 6 is changed. Note that the graph shown in FIG. 5 shows characteristics when the influence of magnetic saturation is taken into account. In FIG. 5, the condition is wn + ws = C (C is a constant value). As shown in FIG. 4, the effective value of the gap magnetic flux density tends to increase as the ratio of the rotational direction width wn of the first permanent magnet 5 to the rotational direction width ws of the second permanent magnet 6 increases. However, since the magnetic flux density near the permanent magnet 6 whose width is shorter becomes higher, magnetic saturation of the electromagnetic steel sheet occurs. For this reason, the gap magnetic flux density does not increase even if the magnetic flux is concentrated more than the saturation magnetic flux density of the electromagnetic steel sheet, and the rotational direction width wn of the first permanent magnet 5 and the rotation of the second permanent magnet 6 as shown in FIG. There is an optimum value for the ratio to the direction width ws. That is, it can be said that Wn: Ws = 4: 1 is optimal. For this reason, in this embodiment, the magnetic flux density at which the magnetic flux generated by the first permanent magnet 5 and the second permanent magnet 6 passes through the magnetic body constituting the stator 2 or the rotor 4 is the saturation of the magnetic body. The magnetic flux density is not exceeded. Thereby, the fall of the fundamental wave magnetic flux density by magnetic saturation can be suppressed, and a torque density can be improved further.

なお、本実施形態では、第１永久磁石５の方が第２永久磁石６よりも回転方向幅が大きくなっているが、これに限らず、第２永久磁石６の方が回転方向幅が大きくなっていてもよい。また、本実施形態では第１永久磁石５と第２永久磁石６の磁気特性を同一としたが、異なる特性の永久磁石を使用してもよい。例えば幅の広い方の永久磁石に安価な磁石を使用することで材料コストを低減できる。   In the present embodiment, the first permanent magnet 5 has a larger rotational direction width than the second permanent magnet 6. However, the present invention is not limited to this, and the second permanent magnet 6 has a larger rotational direction width. It may be. In the present embodiment, the first permanent magnet 5 and the second permanent magnet 6 have the same magnetic characteristics, but permanent magnets having different characteristics may be used. For example, the material cost can be reduced by using an inexpensive magnet for the wider permanent magnet.

このようにして、本実施形態に係る同期電動機１によれば、第１永久磁石５から発生する磁束の回転子回転方向の幅と、第２永久磁石６から発生する磁束の回転子回転方向の幅とが異なっている。このため、第１永久磁石５から発生する磁束の回転子回転方向の幅と、第２永久磁石６から発生する磁束の回転子回転方向の幅とが同じ場合と比較して、基本波磁束密度が高くなり、通電した際に得られるトルクが大きくなる。従って、トルク密度を向上させることができる。   Thus, according to the synchronous motor 1 according to the present embodiment, the width of the magnetic flux generated from the first permanent magnet 5 in the rotor rotation direction and the width of the magnetic flux generated from the second permanent magnet 6 in the rotor rotation direction. The width is different. For this reason, compared with the case where the width | variety of the rotor rotation direction of the magnetic flux which generate | occur | produces from the 1st permanent magnet 5 and the width | variety of the rotor rotation direction of the magnetic flux generate | occur | produced from the 2nd permanent magnet 6 is the same, fundamental wave magnetic flux density. Increases, and the torque obtained when energized increases. Therefore, torque density can be improved.

また、磁性体を通過する磁束密度は磁性体の飽和磁束密度を超えないため、磁気飽和による基本波磁束密度の低下を抑えることができ、より一層トルク密度を向上させることができる。   Moreover, since the magnetic flux density which passes a magnetic body does not exceed the saturation magnetic flux density of a magnetic body, the fall of the fundamental wave magnetic flux density by magnetic saturation can be suppressed, and a torque density can be improved further.

また、第１永久磁石５と第２永久磁石６とは磁気特性が異なるため、一方の磁束発生部材を安価なものにするなど可能となり、コスト低減につなげることができる。   In addition, since the first permanent magnet 5 and the second permanent magnet 6 have different magnetic characteristics, one of the magnetic flux generating members can be made inexpensive and the cost can be reduced.

次に、本発明の第２実施形態を説明する。第２実施形態に係る同期電動機は第１実施形態のものと同様であるが、一部構成が異なっている。以下、第１実施形態との相違点を説明する。   Next, a second embodiment of the present invention will be described. The synchronous motor according to the second embodiment is the same as that of the first embodiment, but a part of the configuration is different. Hereinafter, differences from the first embodiment will be described.

図６は、第２実施形態に係る同期電動機１ａを示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。図６に示すように、第１永久磁石５が平板形状とされているのに対し、第２永久磁石６は第１部材６ａと第２部材６ｂとによって構成されてＶ字形状となっている。   FIG. 6 is a configuration diagram showing the synchronous motor 1a according to the second embodiment, and shows a cross section when cut along a plane perpendicular to the rotation axis direction of the motor. As shown in FIG. 6, the first permanent magnet 5 has a flat plate shape, whereas the second permanent magnet 6 has a V-shape formed by a first member 6a and a second member 6b. .

このように配置形状を異ならせることによっても、図５に示したようなＮ極磁極幅ｗｎとＳ極磁極幅ｗｓに差を設けることが可能となり、第１実施形態と同様の効果が得られる。なお、永久磁石５，６ａ，６ｂは全て同一形状となっていることが望ましい。これにより、製造コストの低減も見込めるためである。さらに、第１永久磁石５をＶ字形状とし、第２永久磁石６を平板形状としてもよい。   Also by making the arrangement shapes different in this way, it becomes possible to provide a difference between the N-pole magnetic pole width wn and the S-pole magnetic pole width ws as shown in FIG. 5, and the same effect as in the first embodiment can be obtained. . It is desirable that the permanent magnets 5, 6a, 6b have the same shape. This is because the manufacturing cost can be reduced. Further, the first permanent magnet 5 may be V-shaped and the second permanent magnet 6 may be flat.

このようにして、第２実施形態に係る同期電動機１ａによれば、第１実施形態と同様に、トルク密度を向上させることができる。   Thus, according to the synchronous motor 1a according to the second embodiment, the torque density can be improved as in the first embodiment.

さらに、第２実施形態によれば、第１永久磁石５と第２永久磁石６とは、一方が平板形状であり、他方がＶ字形状となっている。このため、例えば第１永久磁石５と第２永久磁石６とを、１種類の形状且つ１種類の磁気特性としたとしても、トルク密度を向上させることができ、トルク密度の向上にあたり製造コストを抑えることができる。   Furthermore, according to the second embodiment, one of the first permanent magnet 5 and the second permanent magnet 6 has a flat plate shape and the other has a V shape. For this reason, for example, even if the first permanent magnet 5 and the second permanent magnet 6 have one type of shape and one type of magnetic characteristic, the torque density can be improved, and the manufacturing cost is reduced when the torque density is improved. Can be suppressed.

次に、本発明の第３実施形態を説明する。第３実施形態に係る同期電動機は第１実施形態のものと同様であるが、一部構成が異なっている。以下、第１実施形態との相違点を説明する。   Next, a third embodiment of the present invention will be described. The synchronous motor according to the third embodiment is the same as that of the first embodiment, but a part of the configuration is different. Hereinafter, differences from the first embodiment will be described.

図７は、第３実施形態に係る同期電動機１ｂを示す構成図であり、電動機の回転軸方向に対して垂直な平面で切ったときの断面を示している。図７に示すように、第１永久磁石５と第２永久磁石６とは、それぞれの外周端部から、固定子２と回転子４との空隙までの距離であるブリッジ幅が、異なっている。具体的に、第１永久磁石５の外周端部から空隙までの半径方向距離はｔｎであり、第２永久磁石６の外周端部から空隙までの半径方向距離はｔｓであり、ｔｎ＞ｔｓとなっている。   FIG. 7: is a block diagram which shows the synchronous motor 1b which concerns on 3rd Embodiment, and has shown the cross section when cut by the plane perpendicular | vertical with respect to the rotating shaft direction of an electric motor. As shown in FIG. 7, the first permanent magnet 5 and the second permanent magnet 6 have different bridge widths, which are distances from the respective outer peripheral ends to the gap between the stator 2 and the rotor 4. . Specifically, the radial distance from the outer peripheral end of the first permanent magnet 5 to the air gap is tn, the radial distance from the outer peripheral end of the second permanent magnet 6 to the air gap is ts, and tn> ts. It has become.

永久磁石５，６から空隙までの距離ｔｎ，ｔｓが異なることにより、空隙側を通過せず回転子４内で短絡する磁束の量が、永久磁石５と永久磁石６で差が生じるため、ギャップ磁束密度の波高値や永久磁石付近のギャップ磁束密度の波高値に差が生じ、第１実施形態例と同様の効果が得られる。更に、永久磁石５と永久磁石６に異なる特性の磁石を用いた場合、半径方向距離の大きい方に密度の高い永久磁石を配置することで、回転強度の向上も見込める。   Since the distances tn and ts from the permanent magnets 5 and 6 to the air gap are different, the amount of magnetic flux that does not pass through the air gap side and is short-circuited in the rotor 4 is different between the permanent magnet 5 and the permanent magnet 6. A difference occurs between the peak value of the magnetic flux density and the peak value of the gap magnetic flux density near the permanent magnet, and the same effect as in the first embodiment can be obtained. Further, when magnets having different characteristics are used for the permanent magnet 5 and the permanent magnet 6, the rotational strength can be improved by disposing a permanent magnet having a high density in the larger radial distance.

さらに、第３実施形態では、固定子２に巻き回された巻線３に対し電気角周波数の電流を通電するのに加えて、電気角周波数の２倍以上の高周波数電流を通電するようになっている。これにより、一層トルクを向上させることができるからである。   Furthermore, in the third embodiment, in addition to passing an electric angular frequency current to the winding 3 wound around the stator 2, a high frequency current more than twice the electric angular frequency is supplied. It has become. This is because the torque can be further improved.

なお、上記の高周波数とは、固定子２と回転子４との空隙の磁束密度の高周波成分のうち、最大となる周波数と同一であることが望ましい。トルク向上について最大化を図ることができるからである。   The high frequency is preferably the same as the highest frequency among the high frequency components of the magnetic flux density in the gap between the stator 2 and the rotor 4. This is because it is possible to maximize the torque improvement.

このようにして、第３実施形態に係る同期電動機１ｂによれば、第１実施形態と同様に、トルク密度を向上させることができる。   Thus, according to the synchronous motor 1b according to the third embodiment, the torque density can be improved as in the first embodiment.

また、第１永久磁石５と第２永久磁石６とは、それぞれの外周端部から、固定子２と回転子４との空隙までの距離が、異なっている。このため、例えば密度の高い磁束発生部材側のブリッジ幅を厚くすることで、トルク密度を向上させつつ、回転子の回転強度を向上させることができる。   Further, the first permanent magnet 5 and the second permanent magnet 6 are different from each other in the distance from the outer peripheral end portion to the gap between the stator 2 and the rotor 4. For this reason, for example, by increasing the bridge width on the high-density magnetic flux generating member side, the rotational strength of the rotor can be improved while improving the torque density.

また、固定子２に巻き回された巻線３に、電気角周波数の電流に加えて、電気角周波数の２倍以上の高周波数電流を通電するため、一層トルクを向上させることができる。   In addition to the electrical angular frequency current, a high frequency current that is twice or more the electrical angular frequency is supplied to the winding 3 wound around the stator 2, so that the torque can be further improved.

また、高周波数とは、固定子と回転子との空隙の磁束密度の高周波成分のうち、最大となる周波数と同一であるため、トルク向上について最大化を図ることができる。   Moreover, since the high frequency is the same as the highest frequency among the high frequency components of the magnetic flux density in the gap between the stator and the rotor, the torque improvement can be maximized.

以上、実施形態に基づき本発明を説明したが、本発明は上記実施形態に限られるもので
はなく、本発明の趣旨を逸脱しない範囲で、変更を加えてもよい。 As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

１，１ａ，１ｂ…同期電動機
２…固定子
３…固定子巻線
４…回転子
５…第１永久磁石（Ｎ極磁束発生部材）
６…第２永久磁石（Ｓ極磁束発生部材）
７…シャフト DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Synchronous motor 2 ... Stator 3 ... Stator winding 4 ... Rotor 5 ... 1st permanent magnet (N pole magnetic flux generation member)
6 ... 2nd permanent magnet (S pole magnetic flux generating member)
7 ... Shaft

Claims (7)

磁束発生部材を有する回転子と、電流磁界を回転させることができるように電流が与えられる固定子と、を備えた同期電動機であって、
前記回転子と前記固定子との間の空隙において、前記回転子から前記固定子に向かう磁束を発生させるＮ極磁束発生部材と、前記固定子から前記回転子に向かう磁束を発生させるＳ極磁束発生部材と、を有し、
前記Ｎ極磁束発生部材から発生する磁束の回転子回転方向の幅と、前記Ｓ極磁束発生部材から発生する磁束の回転子回転方向の幅とが異なっている
ことを特徴とする同期電動機。 A synchronous motor comprising a rotor having a magnetic flux generating member and a stator to which a current is applied so that a current magnetic field can be rotated,
In the gap between the rotor and the stator, an N-pole magnetic flux generating member that generates a magnetic flux from the rotor to the stator, and an S-pole magnetic flux that generates a magnetic flux from the stator to the rotor A generating member,
A synchronous motor, wherein a width of a magnetic flux generated from the N-pole magnetic flux generation member in a rotor rotation direction is different from a width of a magnetic flux generated from the S-pole magnetic flux generation member in a rotor rotation direction. 前記Ｎ極磁束発生部材及び前記Ｓ極磁束発生部材により発生する磁束が前記固定子又は前記回転子を構成する磁性体を通過する磁束密度は、前記磁性体の飽和磁束密度を超えない
ことを特徴とする請求項１に記載の同期電動機。 The magnetic flux density at which the magnetic flux generated by the N-pole magnetic flux generating member and the S-pole magnetic flux generating member passes through the magnetic body constituting the stator or the rotor does not exceed the saturation magnetic flux density of the magnetic body. The synchronous motor according to claim 1. 前記Ｎ極磁束発生部材と前記Ｓ極磁束発生部材とは、一方が平板形状であり、他方がＶ字形状となっている
ことを特徴とする請求項１又は請求項２のいずれかに記載の同期電動機。 One of the N-pole magnetic flux generating member and the S-pole magnetic flux generating member has a flat plate shape and the other has a V-shape. Synchronous motor. 前記Ｎ極磁束発生部材と前記Ｓ極磁束発生部材とは、それぞれの外周端部から、前記固定子と前記回転子との空隙までの距離であるブリッジ幅が、異なっている
ことを特徴とする請求項１から請求項３のいずれか１項に記載の同期電動機。 The N-pole magnetic flux generation member and the S-pole magnetic flux generation member have different bridge widths, which are distances from the respective outer peripheral ends to the gap between the stator and the rotor. The synchronous motor according to any one of claims 1 to 3. 前記Ｎ極磁束発生部材と前記Ｓ極磁束発生部材とは磁気特性が異なる
ことを特徴とする請求項１から請求項４のいずれか１項に記載の同期電動機。 The synchronous motor according to any one of claims 1 to 4, wherein the N-pole magnetic flux generation member and the S-pole magnetic flux generation member have different magnetic characteristics. 前記固定子に巻き回された巻線に対し電気角周波数の電流を通電するのに加えて、前記電気角周波数の２倍以上の高周波数電流を通電する
ことを特徴とする請求項１から請求項５のいずれか１項に記載の同期電動機。 The high-frequency current more than twice the electrical angular frequency is passed in addition to passing a current of electrical angular frequency to the winding wound around the stator. 6. The synchronous motor according to any one of items 5. 前記高周波数とは、前記固定子と前記回転子との空隙の磁束密度の高周波成分のうち、最大となる周波数と同一である
ことを特徴とする請求項６に記載の同期電動機。 The synchronous motor according to claim 6, wherein the high frequency is the same as a maximum frequency among high frequency components of a magnetic flux density in a gap between the stator and the rotor.
JP2009076527A 2009-03-26 2009-03-26 Synchronous motor Active JP5556037B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009076527A JP5556037B2 (en) 2009-03-26 2009-03-26 Synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009076527A JP5556037B2 (en) 2009-03-26 2009-03-26 Synchronous motor

Publications (2)

Publication Number Publication Date
JP2010233308A true JP2010233308A (en) 2010-10-14
JP5556037B2 JP5556037B2 (en) 2014-07-23

Family

ID=43048616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009076527A Active JP5556037B2 (en) 2009-03-26 2009-03-26 Synchronous motor

Country Status (1)

Country Link
JP (1) JP5556037B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013133474A1 (en) * 2012-03-08 2013-09-12 일진전기 주식회사 Interior permanent magnet motor
JP2013258835A (en) * 2012-06-13 2013-12-26 Mitsubishi Electric Corp Brushless motor
JP2015159681A (en) * 2014-02-25 2015-09-03 アスモ株式会社 motor
US10734852B2 (en) 2013-03-06 2020-08-04 Asmo Co., Ltd. Motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3340438B1 (en) 2016-12-21 2022-08-10 MOLABO GmbH Electric machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0923598A (en) * 1995-07-03 1997-01-21 Matsushita Electric Ind Co Ltd Magnet embedding type motor
JPH1014185A (en) * 1996-06-18 1998-01-16 Okuma Mach Works Ltd Synchronous motor
JPH11103545A (en) * 1997-09-26 1999-04-13 Fujitsu General Ltd Permanent magnet motor
JP2004343886A (en) * 2003-05-15 2004-12-02 Asmo Co Ltd Embedded magnet type motor
JP2008167557A (en) * 2006-12-27 2008-07-17 Nissan Motor Co Ltd Motor control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0923598A (en) * 1995-07-03 1997-01-21 Matsushita Electric Ind Co Ltd Magnet embedding type motor
JPH1014185A (en) * 1996-06-18 1998-01-16 Okuma Mach Works Ltd Synchronous motor
JPH11103545A (en) * 1997-09-26 1999-04-13 Fujitsu General Ltd Permanent magnet motor
JP2004343886A (en) * 2003-05-15 2004-12-02 Asmo Co Ltd Embedded magnet type motor
JP2008167557A (en) * 2006-12-27 2008-07-17 Nissan Motor Co Ltd Motor control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013133474A1 (en) * 2012-03-08 2013-09-12 일진전기 주식회사 Interior permanent magnet motor
JP2013258835A (en) * 2012-06-13 2013-12-26 Mitsubishi Electric Corp Brushless motor
US10734852B2 (en) 2013-03-06 2020-08-04 Asmo Co., Ltd. Motor
JP2015159681A (en) * 2014-02-25 2015-09-03 アスモ株式会社 motor

Also Published As

Publication number Publication date
JP5556037B2 (en) 2014-07-23

Similar Documents

Publication Publication Date Title
JP5774081B2 (en) Rotating electric machine
JP4396537B2 (en) Permanent magnet type motor
JP5945728B2 (en) Brushless motor and electric device equipped with the same
JP2009247046A (en) Rotary electric machine
JP4844570B2 (en) Permanent magnet type motor
JP2008271640A (en) Axial gap motor
JP2007074870A (en) Rotor embedded with permanent magnet and motor embedded with permanent magnet
US10680475B2 (en) Rotor for rotary electric machine
JP2012217249A (en) Rotor and permanent magnet motor
JP2010158130A (en) Permanent magnet type rotating electric machine and elevator device using the same
JPWO2020017078A1 (en) Rotating electric machine
JP2006304546A (en) Permanent magnet reluctance type rotary electric machine
JP5556037B2 (en) Synchronous motor
JP2012257433A (en) Permanent magnet type rotary electrical machinery
JP2010130885A (en) Rotating electric machine
JP4855747B2 (en) Permanent magnet type reluctance rotating electric machine
WO2020194390A1 (en) Rotating electric machine
JP5811566B2 (en) Rotor and permanent magnet motor
JP2002165391A (en) Synchronous motor
WO2019187205A1 (en) Rotary electric machine
JP2010081676A (en) Rotor of rotating electrical machine, and rotating electrical machine
JP6357870B2 (en) Permanent magnet motor
JP2014054135A (en) Permanent magnet type rotary electric machine
WO2016203578A1 (en) Permanent magnet synchronous motor
JP6201405B2 (en) Rotating electric machine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120131

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130409

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130410

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20130417

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20131224

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140221

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20140507

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140520

R151 Written notification of patent or utility model registration

Ref document number: 5556037

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151