JP2009131030A - Motor core structure - Google Patents

Motor core structure Download PDF

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Publication number
JP2009131030A
JP2009131030A JP2007302841A JP2007302841A JP2009131030A JP 2009131030 A JP2009131030 A JP 2009131030A JP 2007302841 A JP2007302841 A JP 2007302841A JP 2007302841 A JP2007302841 A JP 2007302841A JP 2009131030 A JP2009131030 A JP 2009131030A
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cooling
iron core
core
cooling duct
motor
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Yoshinori Nakanishi
義典 中西
Kazuji Hosozawa
和司 細沢
Yasuhiro Kataoka
康浩 片岡
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Tamagawa Seiki Co Ltd
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Tamagawa Seiki Co Ltd
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Priority to JP2007302841A priority Critical patent/JP2009131030A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor core structure that improves cooling efficiency and is reduced in diameter by embedding a cooling duct for air cooling into the outer circumferential edge of an annular core. <P>SOLUTION: The motor core structure includes an annular core (1) having a protruding magnetic pole (2), a cooling duct (10) for air cooling which is embedded into the outer circumference (11) of the annular core (1), and a cylindrical case (6) provided on the outer circumference of the annular core (1). The annular core (1) is cooled with a cooling air circulating through the cooling duct (10) for air cooling. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、モータ鉄心構造に関し、特に、輪状鉄心の外周縁に空冷用冷却ダクトを埋設して輪状鉄心及びステータ巻線を冷却するための新規な改良に関する。   The present invention relates to a motor core structure, and more particularly to a novel improvement for cooling an annular core and a stator winding by embedding an air cooling cooling duct in the outer peripheral edge of the annular core.

従来、用いられていたこの種のモータ鉄心構造としては、例えば、特許文献１及び２に示されているが、これらの特許文献１及び２等に示されている冷却型のモータ鉄心構造としては、基本的に図２に示される構成であった。
すなわち、図２において符号１で示されるものは全体形状が輪状に形成された輪状鉄心であり、この輪状鉄心１の内面１ａには、所定の角度間隔で内方に突出して形成された複数の突出磁極２が形成されている。 Conventionally, as this type of motor core structure that has been used, for example, Patent Documents 1 and 2 show, but as the cooling type motor core structure shown in these Patent Documents 1 and 2, etc. Basically, the configuration shown in FIG.
That is, what is denoted by reference numeral 1 in FIG. 2 is a ring-shaped iron core whose overall shape is formed in a ring shape, and a plurality of the inner surfaces 1a of the ring-shaped core 1 are formed to protrude inward at predetermined angular intervals. A protruding magnetic pole 2 is formed.

前記各突出磁極２の内端２ａの両端部は、その半径方向に沿って薄く形成された曲折自在部３を有し、この輪状鉄心１は前記曲折自在部３によって接続された複数の鉄心セグメント４によって輪状に構成されている。尚、この薄い曲折自在部３は磁気抵抗が最大で、各々独立して各鉄心セグメント４が形成されている状態に等しくなる。
前記各鉄心セグメント４は、全体形状がＴ字型をなし、図示しないフープ材をプレス加工してなる積層型よりなり、前記各曲折自在部３で一体に接続されていると共に、外周側は当接部５を介して互いに接合されている。 Both end portions of the inner end 2a of each of the projecting magnetic poles 2 have a bendable portion 3 formed thin along the radial direction, and the ring-shaped iron core 1 has a plurality of core segments connected by the bendable portion 3. 4 is configured in a ring shape. The thin bendable portion 3 has the maximum magnetic resistance and is equivalent to a state in which each core segment 4 is formed independently.
Each iron core segment 4 has a T-shape as a whole and is a laminated type formed by pressing a hoop material (not shown). They are joined to each other through the contact portion 5.

前記輪状鉄心１の外周には、空冷用冷却ダクト１０を外周に有する筒状ケース６が設けられることにより、前記各鉄心セグメント４が筒状ケース６の内周面６ａに沿って輪状に形成されている。
尚、前記各鉄心セグメント４の内端２ａの両側には、図示しないロータが回転自在に配設されて冷却型のモータが構成される。 A cylindrical case 6 having an air-cooling cooling duct 10 on the outer periphery is provided on the outer periphery of the annular core 1, so that each iron core segment 4 is formed in a ring shape along the inner peripheral surface 6 a of the cylindrical case 6. ing.
A rotor (not shown) is rotatably disposed on both sides of the inner end 2a of each iron core segment 4 to constitute a cooling type motor.

特開２００１−３４６３６２号公報JP 2001-346362 A 特開２００１−３２０８５７号公報JP 2001-320857 A

従来のモータ鉄心構造は、以上のように構成されていたため、次のような課題が存在していた。
すなわち、筒状ケースの外周に設けた空冷用冷却ダクト内に冷媒である冷却エアを循環させて筒状ケース側から輪状鉄心１を冷却するため、輪状鉄心は間接冷却となり、冷却効率が低く、高パワーモータに対してはより高効率の冷却構造の出現が望まれていた。
また、筒状ケースの外周に空冷用冷却ダクトが設けられるため、この空冷用冷却ダクトの直径分だけモータとしての直径が径大化することになり、小径でかつ高パワー型のモータを実現することは困難であった。 Since the conventional motor core structure is configured as described above, the following problems exist.
That is, since the cooling iron as the refrigerant is circulated in the cooling duct for cooling air provided on the outer periphery of the cylindrical case to cool the annular core 1 from the cylindrical case side, the annular core becomes indirect cooling, and the cooling efficiency is low. The appearance of a more efficient cooling structure has been desired for high-power motors.
In addition, since the cooling duct for air cooling is provided on the outer periphery of the cylindrical case, the diameter of the motor is increased by the diameter of the cooling duct for air cooling, thereby realizing a small diameter and high power motor. It was difficult.

本発明によるモータ鉄心構造は、所定角度間隔毎に内方へ向けて突出する複数の突出磁極を有する輪状鉄心と、前記輪状鉄心の外周縁に埋設された空冷用冷却ダクトと、前記輪状鉄心の外周に設けられた筒状ケースと、を備え、前記空冷用冷却ダクト内に循環される冷却エアにより前記輪状鉄心が冷却される構成であり、また、前記輪状鉄心は、複数の鉄心セグメントを連結して形成され、前記各鉄心セグメントの外周縁には、前記空冷用冷却ダクトが埋設されている構成であり、また、前記外周縁に形成された案内溝内に前記空冷用冷却ダクトが設けられ、前記空冷用冷却ダクトの外周の一部が前記筒状ケースの内周面に接触している構成であり、また、前記各鉄心セグメントは、内端の両端部が曲折自在部を介して互いに接続されている構成である。   A motor core structure according to the present invention includes a ring-shaped core having a plurality of projecting magnetic poles projecting inward at predetermined angular intervals, a cooling duct for air cooling embedded in an outer peripheral edge of the ring-shaped core, and the ring-shaped core. A cylindrical case provided on the outer periphery, wherein the annular core is cooled by cooling air circulated in the cooling duct for air cooling, and the annular core connects a plurality of core segments. The air cooling cooling duct is embedded in the outer peripheral edge of each iron core segment, and the air cooling cooling duct is provided in a guide groove formed in the outer peripheral edge. In addition, a part of the outer periphery of the cooling duct for air cooling is in contact with the inner peripheral surface of the cylindrical case, and both end portions of the iron core segments are mutually connected via bendable portions. It is connected It is formed.

本発明によるモータ鉄心構造は、以上のように構成されているため、次のような効果を得ることができる。
すなわち、輪状鉄心の外周縁に空冷用冷却ダクトが埋設されているため、筒状ケースの内側に空冷用冷却ダクトが配設され、モータの外径は筒状ケースの外径と同一となり、空冷用冷却ダクトを有するモータの外径を小型化することができる。
また、空冷用冷却ダクトは鉄心セグメントと直接熱交換することができ、高効率の冷却能力を有する小型モータを得ることができる。
また、輪状鉄心が多数の鉄心セグメントで形成されているため、鉄心セグメントをプレス加工する場合は、この空冷用冷却ダクトを鉄心セグメントの外周縁に設けるための案内溝を同時に形成することができ、極めて容易に空冷用冷却ダクトを輪状鉄心に内蔵させることができる。 Since the motor core structure according to the present invention is configured as described above, the following effects can be obtained.
That is, since the cooling duct for air cooling is embedded in the outer peripheral edge of the ring-shaped iron core, the cooling duct for air cooling is disposed inside the cylindrical case, and the outer diameter of the motor is the same as the outer diameter of the cylindrical case. The outer diameter of the motor having the cooling duct can be reduced.
Further, the cooling duct for air cooling can directly exchange heat with the iron core segment, and a small motor having a highly efficient cooling capability can be obtained.
In addition, since the ring-shaped iron core is formed of a large number of iron core segments, when pressing the iron core segment, a guide groove for providing this cooling duct for air cooling on the outer peripheral edge of the iron core segment can be formed simultaneously. It is very easy to incorporate a cooling duct for air cooling into a ring-shaped iron core.

本発明は、輪状鉄心の外周縁に空冷用冷却ダクトを埋設して輪状鉄心及びステータ巻線を冷却するようにしたモータ鉄心構造を提供することを目的とする。   It is an object of the present invention to provide a motor core structure in which a cooling duct for air cooling is embedded in the outer peripheral edge of a ring-shaped iron core to cool the ring-shaped iron core and the stator winding.

以下、図面と共に本発明によるモータ鉄心構造の好適な実施の形態について説明する。
尚、従来例と同一又は同等部分には、同一符号を用いて説明する。
図１において、符号１で示されるものは全体形状が輪状に形成された輪状鉄心であり、この輪状鉄心１の内面１ａには、所定の角度間隔で内方に突出して形成された複数の突出磁極２が形成されている。 Hereinafter, preferred embodiments of a motor core structure according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is demonstrated to the part which is the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a ring-shaped iron core whose entire shape is formed in a ring shape, and a plurality of protrusions formed to protrude inward at predetermined angular intervals on the inner surface 1a of the ring-shaped iron core 1. A magnetic pole 2 is formed.

前記各突出磁極２の内端２ａの両端部は、その半径方向に沿って薄く形成された曲折自在部３を有し、この輪状鉄心１は前記曲折自在部３によって接続された複数の鉄心をセグメント４によって輪状に構成されている。
前記各鉄心セグメント４は、全体形状がＴ字型をなし、図示しないフープ材をプレス加工してなる積層型よりなり、前記各曲折自在部３で一体に接続されると共に、外周側は当接部５を介して互いに接合されている。 Both end portions of the inner end 2a of each projecting magnetic pole 2 have a bendable portion 3 that is thinly formed along the radial direction. The ring-shaped iron core 1 includes a plurality of iron cores connected by the bendable portion 3. The segment 4 is formed in a ring shape.
Each iron core segment 4 has a T-shape as a whole and is a laminated type formed by pressing a hoop material (not shown). The iron core segments 4 are integrally connected by the bendable portions 3 and the outer peripheral side is in contact with each other. They are joined to each other via the part 5.

前記輪状鉄心１の外周縁１１には空冷用冷却ダクト１０が埋設されて配設されている。
すなわち、前記空冷用冷却ダクト１０は、前記外周縁１１に軸方向に沿って形成された案内溝１２内に挿入する状態で設けられており、この輪状鉄心１の外周１ｂには、筒状ケース６が嵌合する状態で設けられている。
尚、前記各案内溝１２は、プレス加工の際に同時形成することができる。 An air cooling cooling duct 10 is embedded in the outer peripheral edge 11 of the ring-shaped iron core 1.
That is, the cooling duct 10 for air cooling is provided in a state of being inserted into a guide groove 12 formed along the axial direction on the outer peripheral edge 11, and a cylindrical case is provided on the outer periphery 1 b of the annular core 1. 6 is provided in a fitted state.
The guide grooves 12 can be formed at the same time during pressing.

前記筒状ケース６の内周面６ａは、前記各空冷用冷却ダクト１０の外周の一部が接触し、空冷用冷却ダクト１０と輪状鉄心１及び筒状ケース６との熱交換が高効率で行われるように構成されている。
尚、前記輪状鉄心１は、多数の鉄心セグメント４を曲折自在部３を介して曲折させて輪状に形成した構成について述べたが、一般に用いられる一体型の輪状鉄心をプレス加工し積層して用いることもできる。
また、前記外周縁１１に埋設して設ける空冷用冷却ダクト１０の埋設構造は、前述の案内溝１２に限ることなく、筒状ケース６に接触することのないように、図１の位置よりも内側へずれた位置で軸方向に形成した貫通孔（図示せず）内に空冷用冷却ダクト１０を挿入して設ける構成とすることもできる。
尚、前記輪状鉄心１の各突出磁極２の内側には、図示しないロータが回転自在に配設されて小型で冷却型のモータを構成することができる。 The inner peripheral surface 6a of the cylindrical case 6 is in contact with a part of the outer periphery of each of the air cooling cooling ducts 10, and heat exchange between the air cooling cooling duct 10, the ring-shaped iron core 1 and the cylindrical case 6 is highly efficient. Configured to be done.
The ring-shaped iron core 1 is described as having a structure in which a large number of iron core segments 4 are bent through the bendable portions 3 and formed into a ring shape. However, a commonly used one-piece ring-shaped iron core is pressed and laminated. You can also.
Further, the air cooling cooling duct 10 embedded in the outer peripheral edge 11 is not limited to the guide groove 12 described above, and is not in contact with the cylindrical case 6 than the position shown in FIG. An air cooling cooling duct 10 may be inserted and provided in a through hole (not shown) formed in the axial direction at a position shifted inward.
A rotor (not shown) is rotatably disposed inside each protruding magnetic pole 2 of the ring-shaped iron core 1 so that a small and cooling motor can be configured.

本発明によるモータ鉄心構造を示す平面図である。It is a top view which shows the motor core structure by this invention. 従来のモータ鉄心構造を示す平面図である。It is a top view which shows the conventional motor iron core structure.

符号の説明Explanation of symbols

１ 輪状鉄心
１ａ 内面
１ｂ 外周
２ 突出磁極
２ａ 内端
３ 曲折自在部
４ 鉄心セグメント
５ 当接部
６ 筒状ケース
６ａ 内周面
１０ 空冷用冷却ダクト
１１ 外周縁
１２ 案内溝 DESCRIPTION OF SYMBOLS 1 Ring-shaped iron core 1a Inner surface 1b Outer periphery 2 Protruding magnetic pole 2a Inner end 3 Bendable part 4 Iron core segment 5 Contact part 6 Cylindrical case 6a Inner peripheral surface 10 Air-cooling cooling duct 11 Outer peripheral edge 12 Guide groove

Claims (4)

所定角度間隔毎に内方へ向けて突出する複数の突出磁極(2)を有する輪状鉄心(1)と、前記輪状鉄心(1)の外周縁(11)に埋設された空冷用冷却ダクト(10)と、前記輪状鉄心(1)の外周に設けられた筒状ケース(6)と、を備え、
前記空冷用冷却ダクト(10)に循環される冷却エアにより前記輪状鉄心(1)が冷却される構成としたことを特徴とするモータ鉄心構造。 An annular iron core (1) having a plurality of projecting magnetic poles (2) projecting inward at predetermined angular intervals, and an air cooling cooling duct (10) embedded in the outer peripheral edge (11) of the annular iron core (1) And a cylindrical case (6) provided on the outer periphery of the annular iron core (1),
A motor core structure characterized in that the ring-shaped iron core (1) is cooled by cooling air circulated through the cooling duct (10) for air cooling. 前記輪状鉄心(1)は、複数の鉄心セグメント(4)を連結して形成され、前記各鉄心セグメント(4)の外周縁(11)には、前記空冷用冷却ダクト(10)が埋設されていることを特徴とする請求項１記載のモータ鉄心構造。   The ring-shaped iron core (1) is formed by connecting a plurality of iron core segments (4), and the cooling duct (10) for air cooling is embedded in the outer peripheral edge (11) of each iron core segment (4). The motor core structure according to claim 1, wherein: 前記外周縁(11)に形成された案内溝(12)内に前記空冷用冷却ダクト(10)が設けられ、前記空冷用冷却ダクト(10)の外周の一部が前記筒状ケース(6)の内周面(6a)に接触していることを特徴とする請求項１又は２記載のモータ鉄心構造。   The cooling duct for air cooling (10) is provided in the guide groove (12) formed in the outer peripheral edge (11), and a part of the outer periphery of the cooling duct for air cooling (10) is the cylindrical case (6). 3. The motor core structure according to claim 1, wherein the motor core structure is in contact with the inner peripheral surface (6a). 前記各鉄心セグメント(4)は、内端(2a)の両端部が曲折自在部(3)を介して互いに接続されていることを特徴とする請求項１ないし３の何れかに記載のモータ鉄心構造。   The motor core according to any one of claims 1 to 3, wherein each of the core segments (4) is connected to each other at both ends of an inner end (2a) via a bendable portion (3). Construction.
JP2007302841A 2007-11-22 2007-11-22 Motor core structure Pending JP2009131030A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012040535A3 (en) * 2010-09-23 2012-05-10 Northern Power Systems Utility Scale, Inc. Electromagnetic rotary machines having modular active-coil portions and modules for such machines
CN103023173A (en) * 2011-09-26 2013-04-03 东芝三菱电机产业系统株式会社 Rotating motor
US8789274B2 (en) 2010-09-23 2014-07-29 Northern Power Systems, Inc. Method and system for servicing a horizontal-axis wind power unit
WO2013165629A3 (en) * 2012-04-30 2014-09-12 Parker-Hannifin Corporation Internally cooled servo motor with a segmented stator
US8912704B2 (en) 2010-09-23 2014-12-16 Northern Power Systems, Inc. Sectionalized electromechanical machines having low torque ripple and low cogging torque characteristics
US9281731B2 (en) 2010-09-23 2016-03-08 Northem Power Systems, Inc. Method for maintaining a machine having a rotor and a stator
US9359994B2 (en) 2010-09-23 2016-06-07 Northern Power Systems, Inc. Module-handling tool for installing/removing modules into/from an electromagnetic rotary machine having a modularized active portion

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012040535A3 (en) * 2010-09-23 2012-05-10 Northern Power Systems Utility Scale, Inc. Electromagnetic rotary machines having modular active-coil portions and modules for such machines
US8789274B2 (en) 2010-09-23 2014-07-29 Northern Power Systems, Inc. Method and system for servicing a horizontal-axis wind power unit
US8816546B2 (en) 2010-09-23 2014-08-26 Northern Power Systems, Inc. Electromagnetic rotary machines having modular active-coil portions and modules for such machines
US8912704B2 (en) 2010-09-23 2014-12-16 Northern Power Systems, Inc. Sectionalized electromechanical machines having low torque ripple and low cogging torque characteristics
US9281731B2 (en) 2010-09-23 2016-03-08 Northem Power Systems, Inc. Method for maintaining a machine having a rotor and a stator
US9359994B2 (en) 2010-09-23 2016-06-07 Northern Power Systems, Inc. Module-handling tool for installing/removing modules into/from an electromagnetic rotary machine having a modularized active portion
US9812909B2 (en) 2010-09-23 2017-11-07 Weg Electric Corp Sectionalized electromechanical machines having low torque ripple and low cogging torque characteristics
CN103023173A (en) * 2011-09-26 2013-04-03 东芝三菱电机产业系统株式会社 Rotating motor
WO2013165629A3 (en) * 2012-04-30 2014-09-12 Parker-Hannifin Corporation Internally cooled servo motor with a segmented stator

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