JP4771278B2 - Permanent magnet type motor and method for manufacturing the same - Google Patents

Permanent magnet type motor and method for manufacturing the same Download PDF

Info

Publication number
JP4771278B2
JP4771278B2 JP2005238225A JP2005238225A JP4771278B2 JP 4771278 B2 JP4771278 B2 JP 4771278B2 JP 2005238225 A JP2005238225 A JP 2005238225A JP 2005238225 A JP2005238225 A JP 2005238225A JP 4771278 B2 JP4771278 B2 JP 4771278B2
Authority
JP
Japan
Prior art keywords
stator
permanent magnet
soft magnetic
concentrated winding
magnetic powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2005238225A
Other languages
Japanese (ja)
Other versions
JP2007053867A (en
Inventor
剛 野中
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
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 Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP2005238225A priority Critical patent/JP4771278B2/en
Publication of JP2007053867A publication Critical patent/JP2007053867A/en
Application granted granted Critical
Publication of JP4771278B2 publication Critical patent/JP4771278B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/47—Air-gap windings, i.e. iron-free windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/06—Embedding prefabricated windings in machines
    • H02K15/061—Air-gap windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Description

本発明は、回転子に界磁用磁石が設置された永久磁石形電動機およびその製造方法に関する。 The present invention relates to a permanent magnet type motor in which a field magnet is installed on a rotor and a method for manufacturing the same .

従来から、スロットを有する固定子鉄心と、界磁用磁石を配設した回転子とを備えた永久磁石形電動機において、トルクの向上と損失の低減が計られてきた。特に、小型の永久磁石形電動機では損失の第１の要因が銅損であることから、銅損を低減するために固定子鉄心を分割する方法が提案されている。この方法は、予めボビンに巻装した巻線を分割された固定子鉄心に装着後、固定子を構成するため、巻線の占積率を高めることができる。
このような背景の中で、さらに電動機の小型化に対して、簡易な固定子構造を有するスロットレスワインディングタイプの永久磁石形電動機が提案されている（例えば、特許文献１を参照）。
図５は、従来のスロットレスワインディングタイプの永久磁石形電動機の正断面図である。図５において、１は軟磁性層、２は集中巻コイル、３は固定子鉄心、４は永久磁石、５はロータヨーク、６は絶縁層、７は空隙である。
固定子鉄心３は中空円筒の形状を有して、内径側にスロットがなく、環状に成形された集中巻コイル２を該内径側に配列している。隣り合う集中巻コイル２の間や集中巻コイル２の中央に位置する穴部は絶縁層６で構成されている。また、集中巻コイル２の空隙７に対向する面には、電機子インダクタンスを大きくし、ＰＷＭ駆動時の電流リップルの低下による損失低減を図る目的で、軟磁性層１が設けられている。
このように、従来のスロットレスワインディングタイプの永久磁石形電動機は、ティースに巻線を巻装する構成のスロットワインディングタイプのものに比べて、小型で製造し易い簡易な構造となっている。 Conventionally, in a permanent magnet type electric motor including a stator core having a slot and a rotor provided with a field magnet, torque has been improved and loss has been reduced. In particular, in a small permanent magnet type electric motor, the first factor of loss is copper loss. Therefore, a method of dividing the stator core to reduce copper loss has been proposed. This method can increase the space factor of the winding because the stator is formed after the winding wound in advance on the bobbin is mounted on the divided stator core.
Against this background, a slotless winding type permanent magnet motor having a simple stator structure has been proposed for further miniaturization of the motor (see, for example, Patent Document 1).
FIG. 5 is a front sectional view of a conventional slotless winding type permanent magnet motor. In FIG. 5, 1 is a soft magnetic layer, 2 is a concentrated winding coil, 3 is a stator core, 4 is a permanent magnet, 5 is a rotor yoke, 6 is an insulating layer, and 7 is a gap.
The stator core 3 has a hollow cylindrical shape, has no slots on the inner diameter side, and is arranged with concentrated winding coils 2 formed in an annular shape on the inner diameter side. A hole located between adjacent concentrated winding coils 2 or in the center of the concentrated winding coil 2 is formed of an insulating layer 6. A soft magnetic layer 1 is provided on the surface of the concentrated winding coil 2 facing the air gap 7 for the purpose of increasing the armature inductance and reducing loss due to a decrease in current ripple during PWM driving.
As described above, the conventional slotless winding type permanent magnet electric motor has a simple structure that is smaller and easier to manufacture than the slot winding type in which a winding is wound around a tooth.

また、他の簡易な構造の電動機の例としては、軟磁性粉末成形材の持つ自由度の高い成形性を生かして固定子鉄心を成形したものがある（例えば、特許文献２を参照）。
特開２００２−１５９１５２号公報（明細書第４頁、図１） 特開２００１−１２８４０５号公報（明細書第３頁、図１） Another example of an electric motor having a simple structure is one in which a stator core is molded by taking advantage of the high flexibility of the soft magnetic powder molding material (see, for example, Patent Document 2).
JP 2002-159152 A (Specification, page 4, FIG. 1) JP 2001-128405 A (Specification, page 3, FIG. 1)

ところが、特許文献１に示した従来のスロットレスワインディングタイプの永久磁石形電動機では、一般的に、構造が簡易で小型のモータに適する反面、コイルスペースがそのままギャップとなり、界磁用磁石に対する磁路抵抗が大きくなり、ギャップ磁束密度が小さくなるという傾向があった。そのため、トルクが低下し、また、所望の特性に設計する必要性から巻線の巻線数が増加し、銅損が増加するという問題があった。
一方、特許文献２に示した従来の軟磁性粉末成形材を用いて固定子鉄心を製造する電動機では、予め巻装した巻線を固定子鉄心に装着する方法を行えないため、巻線の占積率を高めることができないという問題があった。
本発明はこのような問題点に鑑みてなされたものであり、スロットワインディングタイプの電動機と同等のギャップ磁束密度を得ることができ、その結果、高トルクで低損失の特性を保持し、簡単な構造を有したスロットレスワインディングタイプの永久磁石形電動機およびその製造方法を提供することを目的とする。 However, in the conventional slotless winding type permanent magnet electric motor shown in Patent Document 1, the structure is simple and suitable for a small motor, but the coil space is directly used as a gap, and the magnetic path for the field magnet is used. There was a tendency that the resistance increased and the gap magnetic flux density decreased. Therefore, there is a problem that the torque is reduced and the number of windings is increased due to the necessity of designing to a desired characteristic, and the copper loss is increased.
On the other hand, in the motor that manufactures the stator core using the conventional soft magnetic powder molding material shown in Patent Document 2, a method of mounting a pre-wound winding on the stator core cannot be performed. There was a problem that the product ratio could not be increased.
The present invention has been made in view of such problems, and can obtain a gap magnetic flux density equivalent to that of a slot winding type electric motor. As a result, it has a high torque and low loss characteristics, and is simple. It is an object of the present invention to provide a slotless winding type permanent magnet motor having a structure and a method of manufacturing the same.

上記問題を解決するため、本発明は次のように構成したものである。
請求項１の発明は、凹凸のない中空円筒状の固定子鉄心と、前記固定子鉄心の内径側に装着され環状に成形された集中巻コイルとより構成された固定子と、前記固定子と空隙を介して対向配置され、表面に界磁用磁石を配設した回転子とを備えた永久磁石形電動機において、前記固定子は、該環状に成形された集中巻コイルの中央に位置する穴部に軟磁性粉末成形材を嵌合し、前記軟磁性粉末成形材の外面は前記固定子鉄心の内面に密着して第１の円筒面を形成し、前記軟磁性粉末成形材の内面は前記集中巻コイルの内面と共に前記回転子に対向する第２の円筒面を形成したことを特徴としている。
また、請求項２の発明は、請求項１記載の永久磁石形電動機において、前記軟磁性粉末成形材が嵌合する前記集中巻コイルは、前記固定子鉄心の内面に密着して円周方向に重なることなく固定されることを特徴としている。
また、請求項３の発明は、凹凸のない中空円筒状の固定子鉄心と、前記固定子鉄心の内径側に装着され環状に成形された集中巻コイルとより構成された固定子と、前記固定子と空隙を介して対向配置され、表面に界磁用磁石を配設した回転子とを備えた永久磁石形電動機を製造する永久磁石形電動機の製造方法であって、前記環状に成形され中央に穴部を有する集中巻コイルを準備し、次いで、前記穴部に軟磁性粉末成形材を嵌合し、前記集中巻コイルに嵌合された前記軟磁性粉末成形材の外面は前記固定子鉄心の内面に密着して第１の円筒面を形成し、前記軟磁性粉末成形材の内面は前記集中巻コイルの内面と共に前記固定子に対向する第２の円筒面を形成するように接着して、前記固定子を形成することを特徴としている。
また、請求項４の発明は、請求項３記載の永久磁石形電動機の製造方法において、前記固定子を形成する際に、コイル結線部も当該固定子と一体に固定することを特徴としている。 In order to solve the above problems, the present invention is configured as follows.
The invention of claim 1 is a stator composed of a hollow cylindrical stator core having no irregularities , a concentrated winding coil mounted on the inner diameter side of the stator core and formed into an annular shape, and the stator In a permanent magnet type electric motor provided with a rotor disposed opposite to each other through a gap and having a field magnet disposed on the surface, the stator is a hole located at the center of the annular concentrated coil. the soft magnetic powder molded material is fitted into the section, the outer surface of the soft magnetic powder molded material forms a first cylindrical surface in close contact with the inner surface of the stator core, the inner surface of the soft magnetic powder molded material the A second cylindrical surface facing the rotor is formed together with the inner surface of the concentrated winding coil .
According to a second aspect of the present invention, there is provided the permanent magnet type electric motor according to the first aspect, wherein the concentrated winding coil into which the soft magnetic powder molding material is fitted closely contacts the inner surface of the stator core and extends in the circumferential direction. have a fixed, wherein Rukoto without overlapping.
According to a third aspect of the present invention, there is provided a stator comprising a hollow cylindrical stator core having no irregularities, a concentrated winding coil mounted on the inner diameter side of the stator core and formed into an annular shape, and the fixed A permanent magnet type motor manufacturing method for manufacturing a permanent magnet type motor having a rotor and a rotor having a field magnet disposed on a surface thereof, facing each other through an air gap, the ring-shaped central A concentrated winding coil having a hole is prepared, and then a soft magnetic powder molding material is fitted into the hole, and the outer surface of the soft magnetic powder molding material fitted into the concentrated winding coil is the stator core. A first cylindrical surface is formed in close contact with the inner surface of the soft magnetic powder, and the inner surface of the soft magnetic powder molding material is bonded together with the inner surface of the concentrated winding coil so as to form a second cylindrical surface facing the stator. The stator is formed.
The invention of claim 4 is the method according to claim 3 permanent magnet type motor according to the time of forming the stator, is characterized that you integrally fixed to the coil-connecting portion is also the stator .

請求項１または３に記載の発明によると、環状の集中巻コイルの中央に位置する穴部に嵌合する軟磁性粉末成形材が磁路の一部となり、スロットワインディングタイプの電動機と同等のギャップ磁束密度を得ることができ、高トルクで低損失の特性を有し、簡単な構造を有したスロットレスワインディングタイプの永久磁石形電動機を提供することができる。
さらに、請求項１または３に記載の発明によると、界磁用磁石に対する磁路抵抗を小さくでき、ギャップ磁束密度を大きくできる。
請求項２に記載の発明によると、コイルスペースを最小に保つことができ、界磁用磁石に対する磁路抵抗を小さくできる。
さらに、請求項３または４に記載の発明によると、安価な電動機を製造することができる。 According to the invention described in claim 1 or 3 , the soft magnetic powder molding material fitted in the hole located at the center of the annular concentrated winding coil becomes a part of the magnetic path, and the gap equivalent to that of the slot winding type electric motor. It is possible to provide a slotless winding type permanent magnet electric motor that can obtain a magnetic flux density, has high torque and low loss characteristics, and has a simple structure.
Furthermore, according to the first or third aspect of the invention, the magnetic path resistance with respect to the field magnet can be reduced, and the gap magnetic flux density can be increased.
According to the second aspect of the present invention, the coil space can be kept to a minimum, and the magnetic path resistance to the field magnet can be reduced.
Furthermore, according to the invention described in claim 3 or 4, an inexpensive electric motor can be manufactured.

以下、本発明の実施例を図に基づいて具体的に説明する。   Embodiments of the present invention will be specifically described below with reference to the drawings.

図１は、本発明の実施例を示す永久磁石形電動機の側断面図、図２は、図１のＡ‐Ａ線に沿う正断面図である。
図において、１１は固定子、１２は回転子、１３は軟磁性粉末成形材、１４は固定子鉄心、１５は集中巻コイル、１５ａは穴部、１６は負荷側プレート、１７は反負荷側プレート、１８はコイル結線部、１９はフレーム、２０は軸受、２１は界磁用磁石、２２はシャフト、２３は樹脂部材である。なお、本発明の構成について、永久磁石形電動機が、スロットのない中空円筒状の固定子鉄心１４と、固定子鉄心１４の内径側に装着され環状に成形された集中巻コイル１５とより構成された固定子１１と、固定子１１と空隙を介して対向配置され、シャフト２２の表面に界磁用磁石２１を配設した回転子１２とを備えた点については、特許文献１と基本的には同じである。
本発明の特徴は、以下のとおりである。
すなわち、固定子１１は、環状に成形された集中巻コイル１５の中央に位置する穴部１５ａに軟磁性粉末成形材１３を嵌合した点である。この軟磁性粉末成形材１３は、表面に絶縁皮膜をもつ個々の鉄紛を樹脂で成形したものとなっており、穴部１５ａに隙間なく嵌合する形状となっている。
また、軟磁性粉末成形材１３は、集中巻コイル１５と径方向に同等の厚みを有し、軟磁性粉末成形材１３の外面は固定子鉄心１４の内面に密着し、軟磁性粉末成形材１３の内面は集中巻コイル１５と共に回転子１２に対向するように円筒面を形成するものとなっている。
さらに、軟磁性粉末成形材１３が嵌合される集中巻コイル１５は、固定子鉄心１４の内面に密着して円周方向に重なることなく接着剤などで固定されるものとなっている。 FIG. 1 is a side sectional view of a permanent magnet type electric motor according to an embodiment of the present invention, and FIG. 2 is a front sectional view taken along line AA of FIG.
In the figure, 11 is a stator, 12 is a rotor, 13 is a soft magnetic powder molding material, 14 is a stator core, 15 is a concentrated winding coil, 15a is a hole, 16 is a load side plate, and 17 is an anti-load side plate. , 18 is a coil connection part, 19 is a frame, 20 is a bearing, 21 is a field magnet, 22 is a shaft, and 23 is a resin member. In addition, about the structure of this invention, a permanent magnet type | mold electric motor is comprised from the hollow cylindrical stator iron core 14 without a slot, and the concentrated winding coil 15 with which it attached to the internal diameter side of the stator iron core 14, and was shape | molded cyclically | annularly. Basically, Patent Document 1 discloses that the stator 11 and the rotor 12 that are disposed so as to face the stator 11 with a gap and have the field magnet 21 disposed on the surface of the shaft 22 are provided. Are the same.
The features of the present invention are as follows.
That is, the stator 11 is a point in which the soft magnetic powder molding material 13 is fitted into the hole 15a located in the center of the concentrated winding coil 15 formed in an annular shape. The soft magnetic powder molding material 13 is formed by molding individual iron powders having an insulating film on the surface with a resin, and has a shape that fits into the hole 15a without a gap.
The soft magnetic powder molding material 13 has the same thickness as the concentrated winding coil 15 in the radial direction. The outer surface of the soft magnetic powder molding material 13 is in close contact with the inner surface of the stator core 14, and the soft magnetic powder molding material 13. A cylindrical surface is formed so as to face the rotor 12 together with the concentrated winding coil 15.
Furthermore, the concentrated winding coil 15 into which the soft magnetic powder molding material 13 is fitted is in close contact with the inner surface of the stator core 14 and is fixed with an adhesive or the like without overlapping in the circumferential direction.

図３は、本実施例の永久磁石形電動機に用いる固定子の組立手順を説明するための斜視図である。
図３において、環状に成形された集中巻コイル１５と、該集中巻コイル１５の中央に位置する穴部１５ａに嵌合する軟磁性粉末成形材１３を必要な数だけ嵌合し、集中巻コイル１５に嵌合された軟磁性粉末成形材１３を固定子鉄心１４の内面に密着し、その内面は集中巻コイル１５と共に、エアギャップの円筒面を形成するように接着し、固定子を形成する。このとき、図１に示したコイル結線部１８も一体に固定する。 FIG. 3 is a perspective view for explaining an assembling procedure of the stator used in the permanent magnet type electric motor of this embodiment.
In FIG. 3, a concentrated winding coil 15 is formed by fitting a necessary number of concentrated winding coils 15 and a soft magnetic powder molding material 13 to be fitted into a hole 15a located in the center of the concentrated winding coil 15. The soft magnetic powder molding material 13 fitted to 15 is brought into close contact with the inner surface of the stator core 14, and the inner surface is bonded together with the concentrated winding coil 15 so as to form a cylindrical surface of an air gap, thereby forming a stator. . At this time, the coil connection part 18 shown in FIG. 1 is also fixed integrally.

第１実施例はこのように、固定子１１は、環状に成形された集中巻コイル１５の中央に位置する穴部１５ａに軟磁性粉末成形材１３を嵌合する構成にしたので、集中巻コイルの穴部１５ａに嵌合する軟磁性粉末成形材が磁路の一部となり、スロットワインディングタイプの電動機と同等のギャップ磁束密度を得ることができ、高トルクで低損失の永久磁石形電動機を得ることができる。また、通常のスロットレスワインディングタイプの電動機と同等に簡易な構造で、同様な製造法を用いるため安価な電動機を製造することができる。   In this way, in the first embodiment, the stator 11 has a configuration in which the soft magnetic powder molding material 13 is fitted into the hole 15a located in the center of the concentrated winding coil 15 formed in an annular shape. The soft magnetic powder molding material fitted into the hole 15a becomes a part of the magnetic path, and a gap magnetic flux density equivalent to that of the slot winding type electric motor can be obtained, and a permanent magnet electric motor with high torque and low loss can be obtained. be able to. In addition, since a similar manufacturing method is used with a simple structure equivalent to that of a normal slotless winding type electric motor, an inexpensive electric motor can be manufactured.

図４は、本発明の第２の実施例を示す永久磁石形電動機の固定子の正断面図である。
図において、２３は樹脂部材である。
第２実施例は、第１実施例と同様に、軟磁性粉末成形材１３は表面に絶縁皮膜をもつ個々の鉄紛を樹脂で成形することにより、集中巻コイル１５の中央に位置する穴部１５ａに隙間なく嵌合する形状を構成している点、軟磁性粉末成形材１３が、集中巻コイル１５と径方向に同等の厚みを持つ点は同じである。
異なる点は、軟磁性粉末成形材１３を嵌合してなる集中巻コイル１５の外面を固定子鉄心１４の内面に密着した際に、円周方向に重なることのないように樹脂部材２３により保持さした点である。
第２実施例は、上記構成にしたので、集中巻コイルの中央に位置する穴部に嵌合する軟磁性粉末成形材が磁路の一部となり、スロットワインディングタイプの電動機と同等のギャップ磁束密度を得ることができ、高トルクで低損失の永久磁石形電動機を提供することができる。また、通常のスロットレスワインディングタイプの電動機と同等に簡易な構造で、同様な製造法を用いるため安価な電動機を製造することができる。 FIG. 4 is a front sectional view of a stator of a permanent magnet type electric motor showing a second embodiment of the present invention.
In the figure, reference numeral 23 denotes a resin member.
In the second embodiment, as in the first embodiment, the soft magnetic powder molding material 13 is formed by molding individual iron powder having an insulating film on the surface with a resin so that a hole located at the center of the concentrated winding coil 15 is formed. The point which comprises the shape fitted to 15a without a gap, and the point that the soft magnetic powder molding material 13 has the thickness equivalent to the concentrated winding coil 15 in the radial direction are the same.
The difference is that when the outer surface of the concentrated winding coil 15 formed by fitting the soft magnetic powder molding material 13 is brought into close contact with the inner surface of the stator core 14, it is held by the resin member 23 so as not to overlap in the circumferential direction. This is the point.
Since the second embodiment has the above-described configuration, the soft magnetic powder molding material fitted into the hole located at the center of the concentrated winding coil becomes a part of the magnetic path, and the gap magnetic flux density equivalent to that of the slot winding type electric motor. Thus, a permanent magnet motor with high torque and low loss can be provided. In addition, since a similar manufacturing method is used with a simple structure equivalent to that of a normal slotless winding type electric motor, an inexpensive electric motor can be manufactured.

本発明の電動機は、人型ロボットの指関節等、小型で高トルクを要求される減速機付き電動機に供するものである。限られたスペースを有効に活用するため、センサレス駆動とし、位置検出に要するべきスペースをトルク増大のためのスペースに用いている。必用に応じて、位置推定によるフィードバック制御によるセンサレス駆動を行うこともあるが、本実施例では、電気角１５０°通電の矩形波駆動とし、１２ステップを周期とするシーケンシャル駆動を用いて駆動する。
また、本実施例の電動機は、負荷側に図示しない２段のハーモニック減速機を備え、１５００：１の減速を行っているため、出力軸の１回転に対し最低でも３６０００ステップの位置決めが可能であり、電動機単体の最大トルクを効率低下を含め５００倍以上に増大できる。
さらに、本発明の電動機は、トルクの増大と損失の低減に貢献するが、逆にコギングトルクが増大し易く、これは駆動状態におけるトルクリップルを増大させる。これに対しては、通常の使用状態における電動機の回転速度を毎分１００００回転以上に設定することで、トルクリップルを平滑することができる。そのことから、本発明は、通常の電動機としてもトルクの増大と損失の低減に有効であるが、高減速の減速機付き電動機とした場合、欠点が解消されその有用性が顕著となる。 The electric motor of the present invention is used for a motor with a reduction gear that is small and requires high torque, such as a finger joint of a humanoid robot. In order to effectively use the limited space, sensorless driving is used, and the space necessary for position detection is used as a space for increasing torque. Although sensorless driving by feedback control based on position estimation may be performed as necessary, in this embodiment, driving is performed using rectangular wave driving with an electrical angle of 150 ° energization and sequential driving with a cycle of 12 steps.
Further, since the electric motor of this embodiment is provided with a two-stage harmonic reduction gear (not shown) on the load side and performs a reduction of 1500: 1, it is possible to position at least 36000 steps with respect to one rotation of the output shaft. Yes, the maximum torque of a single motor can be increased by 500 times or more including efficiency reduction.
Furthermore, the electric motor of the present invention contributes to an increase in torque and a reduction in loss, but conversely, the cogging torque tends to increase, which increases the torque ripple in the driving state. On the other hand, torque ripple can be smoothed by setting the rotation speed of the electric motor in a normal use state to 10,000 rotations per minute or more. Therefore, the present invention is effective for increasing torque and reducing loss even with a normal motor. However, when a motor with a reduction gear with a high speed reduction is used, the drawback is eliminated and its usefulness becomes remarkable.

本発明の実施例を示す永久磁石形電動機の側断面図、Side sectional view of a permanent magnet type motor showing an embodiment of the present invention, 図１のＡ‐Ａ線に沿う正断面図、FIG. 1 is a front sectional view taken along line AA in FIG. 本実施例の永久磁石形電動機に用いる固定子の組立手順を説明するための斜視図、The perspective view for demonstrating the assembly procedure of the stator used for the permanent magnet type motor of a present Example, 本発明の第２の実施例を示す永久磁石形電動機の固定子の正断面図、Front sectional view of a stator of a permanent magnet type electric motor showing a second embodiment of the present invention, 従来のスロットレスワインディングタイプの永久磁石形電動機の正断面図Front sectional view of a conventional slotless winding type permanent magnet motor

符号の説明Explanation of symbols

１ 軟磁性層
２ 集中巻コイル
３ 固定子鉄心
４ 永久磁石
５ ロータヨーク
６ 絶縁層
７ 空隙
１１ 固定子
１２ 回転子
１３ 軟磁性粉末成形材
１４ 固定子鉄心
１５ 集中巻コイル
１５ａ 穴部
１６ 負荷側プレート
１７ 反負荷側プレート
１８ コイル結線部
１９ フレーム
２０ 軸受け
２１ 界磁用磁石
２２ シャフト
２３ 樹脂部材 DESCRIPTION OF SYMBOLS 1 Soft magnetic layer 2 Concentrated winding coil 3 Stator core 4 Permanent magnet 5 Rotor yoke 6 Insulating layer 7 Gap 11 Stator 12 Rotor 13 Soft magnetic powder molding material 14 Stator core 15 Concentrated winding coil 15a Hole 16 Load side plate 17 Anti-load side plate 18 Coil connection portion 19 Frame 20 Bearing 21 Field magnet 22 Shaft 23 Resin member

Claims (4)

凹凸のない中空円筒状の固定子鉄心と、前記固定子鉄心の内径側に装着され環状に成形された集中巻コイルとより構成された固定子と、
前記固定子と空隙を介して対向配置され、表面に界磁用磁石を配設した回転子と
を備えた永久磁石形電動機において、
前記固定子は、該環状に成形された集中巻コイルの中央に位置する穴部に軟磁性粉末成形材を嵌合し、
前記軟磁性粉末成形材の外面は前記固定子鉄心の内面に密着して第１の円筒面を形成し、
前記軟磁性粉末成形材の内面は前記集中巻コイルの内面と共に前記回転子に対向する第２の円筒面を形成したことを特徴する永久磁石形電動機。 A stator composed of a hollow cylindrical stator core without irregularities , and a concentrated winding coil that is mounted on the inner diameter side of the stator core and formed into an annular shape,
In a permanent magnet type electric motor provided with a rotor arranged opposite to the stator via a gap and having a field magnet disposed on the surface,
The stator is fitted the soft magnetic powder molded material into the hole located in the center of the concentrated winding coils formed into the ring shape,
The outer surface of the soft magnetic powder molding material is in close contact with the inner surface of the stator core to form a first cylindrical surface,
A permanent magnet type electric motor characterized in that an inner surface of the soft magnetic powder molding material is formed with a second cylindrical surface facing the rotor together with an inner surface of the concentrated winding coil . 前記軟磁性粉末成形材が嵌合する前記集中巻コイルは、前記固定子鉄心の内面に密着して円周方向に重なることなく固定されることを特徴とする請求項１に記載の永久磁石形電動機。 2. The permanent magnet type according to claim 1, wherein the concentrated winding coil into which the soft magnetic powder molding material is fitted is fixed to the inner surface of the stator core without being overlapped in the circumferential direction. Electric motor. 凹凸のない中空円筒状の固定子鉄心と、前記固定子鉄心の内径側に装着され環状に成形された集中巻コイルとより構成された固定子と、
前記固定子と空隙を介して対向配置され、表面に界磁用磁石を配設した回転子と
を備えた永久磁石形電動機を製造する永久磁石形電動機の製造方法であって、
前記環状に成形され中央に穴部を有する集中巻コイルを準備し、次いで、前記穴部に軟磁性粉末成形材を嵌合し、前記集中巻コイルに嵌合された前記軟磁性粉末成形材の外面は前記固定子鉄心の内面に密着して第１の円筒面を形成し、
前記軟磁性粉末成形材の内面は前記集中巻コイルの内面と共に前記固定子に対向する第２の円筒面を形成するように接着して、前記固定子を形成することを特徴する永久磁石形電動機の製造方法。 A stator composed of a hollow cylindrical stator core without irregularities, and a concentrated winding coil that is mounted on the inner diameter side of the stator core and formed into an annular shape,
A rotor disposed opposite to the stator via a gap and having a field magnet disposed on the surface;
A method of manufacturing a permanent magnet type electric motor with a permanent magnet type electric motor comprising:
A concentrated winding coil formed in the annular shape and having a hole in the center is prepared, and then a soft magnetic powder molding material is fitted into the hole, and the soft magnetic powder molding material fitted into the concentrated winding coil The outer surface is in close contact with the inner surface of the stator core to form a first cylindrical surface ,
Said inner surface of the soft magnetic powder molded material bonded so as to form a second cylindrical surface facing the stator with an inner surface of the concentrated winding coil, wherein to that permanent magnets forming said stator A manufacturing method of an electric motor. 前記固定子を形成する際に、コイル結線部も当該固定子と一体に固定することを特徴とする請求項３に記載の永久磁石形電動機の製造方法。 When forming the stator, the manufacturing method of the permanent magnet type motor according to claim 3 coil connection portions, also characterized that you fixed integrally with the stator.
JP2005238225A 2005-08-19 2005-08-19 Permanent magnet type motor and method for manufacturing the same Expired - Fee Related JP4771278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005238225A JP4771278B2 (en) 2005-08-19 2005-08-19 Permanent magnet type motor and method for manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005238225A JP4771278B2 (en) 2005-08-19 2005-08-19 Permanent magnet type motor and method for manufacturing the same

Publications (2)

Publication Number Publication Date
JP2007053867A JP2007053867A (en) 2007-03-01
JP4771278B2 true JP4771278B2 (en) 2011-09-14

Family

ID=37917916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005238225A Expired - Fee Related JP4771278B2 (en) 2005-08-19 2005-08-19 Permanent magnet type motor and method for manufacturing the same

Country Status (1)

Country Link
JP (1) JP4771278B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326536A (en) * 2013-07-03 2013-09-25 江苏大学 Coil and permanent magnet hybrid excitation type eddy current retarder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016113436A1 (en) * 2016-07-21 2018-01-25 Ebm-Papst Mulfingen Gmbh & Co. Kg Stand of a rotary field machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09261925A (en) * 1996-03-21 1997-10-03 Toshiba Corp Manufacture of stator of inner rotor type rotating electric machine
JP4650707B2 (en) * 2000-11-17 2011-03-16 株式会社安川電機 Permanent magnet type motor stator and permanent magnet type motor
JP2003009491A (en) * 2001-06-19 2003-01-10 Yaskawa Electric Corp Permanent magnet type brushless dc motor
JP2003088075A (en) * 2001-09-03 2003-03-20 Jianzhun Electric Mach Ind Co Ltd Structure of dc brushless motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326536A (en) * 2013-07-03 2013-09-25 江苏大学 Coil and permanent magnet hybrid excitation type eddy current retarder

Also Published As

Publication number Publication date
JP2007053867A (en) 2007-03-01

Similar Documents

Publication Publication Date Title
JPH1169749A (en) Motor structure and manufacture thereof
WO2007049411A1 (en) Capacitor motor and process for producing the same
JP2010246171A (en) Axial gap type dynamo-electric machine
JP2000253635A (en) Axial gap motor
EP3451509B1 (en) Brushless motor and winding method for its stator
JPWO2020017133A1 (en) Distributed winding radial gap type rotary electric machine and its stator
JPH11355981A (en) Radial gap type small cylindrical dynamo-electric machine
JP4665454B2 (en) motor
WO2019077983A1 (en) Axial gap-type dynamo-electric machine
WO2018037652A1 (en) Consequent pole-type rotor, electric motor, and air conditioner
JP2008104288A (en) Capacitor motor, and manufacturing method therefor
JP4929962B2 (en) Slotless motor
JP2009050116A (en) Capacitor motor, and manufacturing method thereof
JP6824348B2 (en) Manufacturing method of single-phase brushless motor, single-phase brushless motor, vacuum cleaner equipped with single-phase brushless motor, and manufacturing method of vacuum cleaner
JP4771278B2 (en) Permanent magnet type motor and method for manufacturing the same
JP2018166352A (en) Electric motor and its manufacturing method
JP2011097756A (en) Stator yoke for stepping motor and stepping motor
JP5274496B2 (en) Magnetic metal body and method for manufacturing rotating electrical machine using magnetic metal body
JP2010004635A (en) Field magneton, manufacturing method therefor, and rotating electrical machine
CN110574257B (en) Stator for electric motor and electric motor
JP4935834B2 (en) Electric motor and method of manufacturing the electric motor
JP4543415B2 (en) Core structure of smooth armature winding AC servo motor and smooth armature winding AC servo motor using this core structure
JP2000245124A (en) Smooth core armature wound motor
WO2007123058A1 (en) Motor
JP2011114989A (en) Rotary electric machine

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080710

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110113

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110119

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110314

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110530

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140701

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110612

LAPS Cancellation because of no payment of annual fees