JP5023257B2 - Rotating motor and its heat transfer structure - Google Patents

Rotating motor and its heat transfer structure Download PDF

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JP5023257B2
JP5023257B2 JP2007181554A JP2007181554A JP5023257B2 JP 5023257 B2 JP5023257 B2 JP 5023257B2 JP 2007181554 A JP2007181554 A JP 2007181554A JP 2007181554 A JP2007181554 A JP 2007181554A JP 5023257 B2 JP5023257 B2 JP 5023257B2
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heat transfer
transfer structure
yoke
electric motor
rotary electric
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JP2009022080A (en
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茂 西田
純 金田一
泰司 志村
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Tamagawa Seiki Co Ltd
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Description

本発明は、回転電動機およびその伝熱構造に係り、特に小形サーボモータ、DCブラシレスモータ、シンクロナスモータ、小形インダクションモータ等の回転電動機の放熱冷却性を従来よりも改善することのできる、回転電動機およびその伝熱構造に関する。   The present invention relates to a rotary motor and a heat transfer structure thereof, and more particularly to a rotary motor capable of improving the heat radiation cooling performance of a rotary motor such as a small servo motor, a DC brushless motor, a synchronous motor, and a small induction motor. And its heat transfer structure.

小形サーボモータ、DCブラシレスモータ、小形インダクションモータ等の回転電動機においては従来、電機子鉄心のヨーク部に、別途巻線を施したティース部を挿入して両者を合体させることにより電機子を形成したり、またはヨーク部機能とティース部機能の一体となった電機子鉄心に巻線を施して形成した電機子を、アルミ押し出し成形やアルミダイカスト成形などで形成したケースに挿入したり、もしくは該電機子を絶縁樹脂で一体モールドすることによって、ケース(ステータ)を形成している。   Conventionally, rotary motors such as small servo motors, DC brushless motors, small induction motors, etc. have formed an armature by inserting a tooth portion with a separate winding into the yoke portion of the armature core and combining them. Or an armature formed by winding an armature core with a yoke part function and a teeth part function integrated into a case formed by aluminum extrusion molding or aluminum die casting, or A case (stator) is formed by integrally molding the child with insulating resin.

しかし従来、ステータ部の材質が熱伝導度の低い樹脂のみである等の理由により、電機子内部の巻線において発生した熱の放出には、限界がある。電機子内部で発生する熱を取付けフランジ部等の筐体部材に有効に伝達してこれを回転電動機外に効率よく放出することができないと、過熱による電機子の焼損や、回転電動機の寿命短縮化を引き起こすことなる。また、各利用分野において各観点から回転電動機の小形軽量化の需要が増加しているが、回転電動機の小形軽量化にはその冷却放熱技術の確立、向上が大きく関係する。   Conventionally, however, there is a limit to the release of heat generated in the windings in the armature because the stator is made of only a resin having low thermal conductivity. If the heat generated inside the armature cannot be effectively transferred to the housing member such as the mounting flange and efficiently released to the outside of the rotary motor, the armature will burn out due to overheating and the life of the rotary motor will be shortened. It will cause. Further, in each application field, demands for reducing the size and weight of rotating motors are increasing from various viewpoints. The establishment and improvement of the cooling and heat dissipation technology is greatly related to reducing the size and weight of rotating motors.

かかる問題を解決するための技術としては、たとえば、モールドステータ内部の複数箇所に、電機子鉄板の積厚方向に対して電機子鉄心の側面に接触させるように金属棒を埋設し、モールドステータと負荷側エンドブラケットとの対向部に金属棒の端部を露出させて負荷側エンドブラケットの対向部に直接接触させる構造によって、電機子を効果的に冷却することによりモータ全体を効率良く冷却するという提案がなされている(特許文献1)。   As a technique for solving such a problem, for example, a metal rod is embedded in a plurality of locations inside the molded stator so as to contact the side surface of the armature core with respect to the stacking direction of the armature iron plate, With the structure where the end of the metal rod is exposed at the part facing the load side end bracket and directly contacting the part facing the load side end bracket, the entire motor is efficiently cooled by effectively cooling the armature. A proposal has been made (Patent Document 1).

特許3780164号「回転電機」Patent 3780164 "Rotating electric machine"

しかし、製造工程の簡素化およびコストの低減を図り、かつ従来と同等またはそれ以上のモータ冷却効果を得られることが望ましい。このことは、回転電動機の小形軽量化においてはなおさらである。   However, it is desirable to simplify the manufacturing process and reduce the cost, and to obtain a motor cooling effect equivalent to or higher than that of the prior art. This is especially true in the reduction in the size and weight of rotary electric motors.

本発明が解決しようとする課題は、従来技術の状況を踏まえ、より製造工程を簡素化できかつコスト低減可能であり、その上従来技術と同等以上の回転電動機の放熱冷却効果を得ることのできる、回転電動機およびその伝熱構造を提供することである。   The problem to be solved by the present invention is that the manufacturing process can be further simplified and the cost can be reduced based on the state of the prior art, and furthermore, the heat radiation cooling effect of the rotary motor equivalent to or higher than that of the prior art can be obtained. It is to provide a rotary motor and its heat transfer structure.

本願発明者は上記課題について検討した結果、集熱部がヨーク部の全周に亘って均等に配置された単一の伝熱構造により上記課題が解決可能であることを見出し、本発明に至った。すなわち、上記課題を解決するための手段として本願で特許請求される発明、もしくは少なくとも開示される発明は、以下の通りである。   As a result of studying the above problems, the inventor of the present application has found that the above problems can be solved by a single heat transfer structure in which the heat collecting portion is uniformly arranged over the entire circumference of the yoke portion, and has led to the present invention. It was. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

(1) 電機子鉄心のヨーク部とティース部が分割されて形成される分割鉄心を有する回転電動機において、該ヨーク部に熱伝導性材料からなる伝熱構造が装着され、その回りを絶縁材料により封止したステータ構造であり、該伝熱構造は、該ヨーク部端面に密着可能な環状基部と、該ヨーク部外周に密着可能で該環状基部から延設されるプレート部とが一体に形成されていることを特徴とする、回転電動機。
(2) 前記伝熱構造のプレート部は、櫛の歯状に形成されていることを特徴とする、(1)に記載の回転電動機。
(3) 前記伝熱構造は、金属製または樹脂製であることを特徴とする、(1)または(2)に記載の回転電動機。
(4) 前記伝熱構造の環状基部は、フランジ部と密着可能に形成されていることを特徴とする、(2)または(3)に記載の回転電動機。
(5) 電機子鉄心のヨーク部とティース部が分割されて形成される分割鉄心を有する回転電動機において該ヨーク部に装着可能な伝熱構造であって、該伝熱構造は、熱伝導性材料からなり、該ヨーク部端面に密着可能な環状基部と、該ヨーク部外周に密着可能で該環状基部から延設されるプレート部とが一体に形成されてなることを特徴とする、回転電動機の伝熱構造。
(1) In a rotary electric motor having a split core formed by dividing a yoke part and a tooth part of an armature core, a heat transfer structure made of a heat conductive material is mounted on the yoke part, and the periphery thereof is made of an insulating material. This is a sealed stator structure, and the heat transfer structure is formed by integrally forming an annular base portion that can be in close contact with the end surface of the yoke portion and a plate portion that can be in close contact with the outer periphery of the yoke portion and that extends from the annular base portion. A rotary electric motor characterized by that.
(2) The rotary electric motor according to (1), wherein the plate portion of the heat transfer structure is formed in a comb tooth shape.
(3) The rotary electric motor according to (1) or (2), wherein the heat transfer structure is made of metal or resin.
(4) The rotary electric motor according to (2) or (3), wherein the annular base portion of the heat transfer structure is formed so as to be in close contact with the flange portion.
(5) A heat transfer structure that can be mounted on a yoke in a rotary electric motor having a split iron core formed by dividing a yoke part and a tooth part of an armature core, the heat transfer structure comprising a heat conductive material An annular base portion that can be in close contact with the end surface of the yoke portion and a plate portion that can be in close contact with the outer periphery of the yoke portion and that extends from the annular base portion, are integrally formed. Heat transfer structure.

つまり本発明は、ヨーク部の全周に亘って均等に接触可能なように集熱部たるプレート部が設けられた単一の伝熱構造を用いるというものである。本発明に係る伝熱構造は、たとえばアルミニウム等の高熱伝導性素材を用いて、ヨーク部の外周(側面)と端面を覆うようにして一体化形成された構造であり、これをヨーク部に被せて装着し、さらに電気絶縁材により一体成型することによって、電気絶縁性や密封性を保持したまま、コイルで発生する熱を効率良く取り付けフランジ部に伝達することができる。   That is, the present invention uses a single heat transfer structure provided with a plate portion as a heat collecting portion so as to be able to contact evenly over the entire circumference of the yoke portion. The heat transfer structure according to the present invention is a structure integrally formed so as to cover the outer periphery (side surface) and the end surface of the yoke portion using a high heat conductive material such as aluminum, for example, and covers the yoke portion. In addition, the heat generated by the coil can be efficiently transmitted to the mounting flange portion while maintaining the electrical insulation and the sealing performance.

本発明の回転電動機およびその伝熱構造は上述の様に構成されるため、これによれば、従来技術と比較して、より製造工程を簡素化でき、かつコスト低減が可となる。しかも、その放熱冷却効果は従来技術と同等以上であり、充分な冷却効果が得られる。回転電動機の小形軽量化にも大いに寄与するものである。   Since the rotary electric motor and the heat transfer structure thereof according to the present invention are configured as described above, according to this, the manufacturing process can be further simplified and the cost can be reduced as compared with the prior art. Moreover, the heat dissipation cooling effect is equal to or higher than that of the prior art, and a sufficient cooling effect can be obtained. This greatly contributes to reducing the size and weight of rotating motors.

つまり本発明により、電機子内で発生する熱を、電気絶縁性や密封性を保持したまま、モータの取り付けフランジに効率良く伝達して機外に逃がすことができ、放熱特性の優れた電機子を構成することができる。それにより、電機子巻線等の温度上昇が抑制され、過熱による電機子焼損、熱劣化による短寿命化を防止することができる。その結果本発明によれば、回転電動機の小形軽量化実現にも大いに寄与することができる。   In other words, according to the present invention, the heat generated in the armature can be efficiently transferred to the motor mounting flange while maintaining its electrical insulation and sealing properties, and escaped to the outside of the machine. Can be configured. Thereby, the temperature rise of an armature winding etc. is suppressed and the armature burning by overheating and the life shortening by thermal degradation can be prevented. As a result, according to the present invention, it is possible to greatly contribute to the reduction in size and weight of the rotary motor.

以下、本発明を図面により詳細に説明する。
図1は、本発明の回転電動機の要部構成を示す半断面図である。図示するように本回転電動機は、電機子鉄心のヨーク部11とティース部12が分割されて形成される分割鉄心を有する回転電動機で、ヨーク部11に熱伝導性材料からなる伝熱構造14が装着され、その回りを絶縁材料により封止したステータ21構造であり、伝熱構造14は、ヨーク部11端面に密着可能な環状基部と、ヨーク部11外周に密着可能で環状基部から延設されるプレート部とが一体に形成されていることを、特徴的な構成とする。伝熱構造14について、さらに説明する。
The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a half cross-sectional view showing a configuration of a main part of a rotary electric motor according to the present invention. As shown in the figure, this rotary electric motor is a rotary electric motor having a split core formed by dividing a yoke part 11 and a tooth part 12 of an armature core, and a heat transfer structure 14 made of a heat conductive material is provided on the yoke part 11. The stator 21 structure is mounted and sealed around with an insulating material. The heat transfer structure 14 includes an annular base portion that can be in close contact with the end surface of the yoke portion 11 and an annular base portion that can be in close contact with the outer periphery of the yoke portion 11. A characteristic configuration is that the plate portion is integrally formed. The heat transfer structure 14 will be further described.

図2は、本発明の回転電動機の要部構成を示す斜視図、また、
図3は、本発明の回転電動機の要部構成を示す分解斜視図である。これらに図示するように、本発明回転電動機に係る伝熱構造34は、ヨーク部31端面に密着可能な環状基部34Aと、ヨーク部31外周に密着可能で環状基部34Aから延設されるプレート部34Pとが櫛の歯状に設けられて、一体に形成された構成である。
FIG. 2 is a perspective view showing a main part configuration of the rotary electric motor of the present invention,
FIG. 3 is an exploded perspective view showing a main configuration of the rotary electric motor according to the present invention. As shown in these figures, the heat transfer structure 34 according to the rotary electric motor of the present invention includes an annular base 34A that can be in close contact with the end surface of the yoke 31 and a plate portion that can be in close contact with the outer periphery of the yoke 31 and that extends from the annular base 34A. 34P is provided in the shape of a comb and is formed integrally.

伝熱構造34は、回転電動機のヨーク部31の外周を被覆するように嵌め込まれて装着される。このとき、プレート部34Pがヨーク部31の外周表面に密着可能なように、伝熱構造34は形成されている。さらに環状基部34Aはヨーク部31に装着された際、ヨーク部31端面に密着可能なように、伝熱構造34は形成されている。また、環状基部34Aは、フランジ部と密着可能なように形成されている。   The heat transfer structure 34 is fitted and attached so as to cover the outer periphery of the yoke portion 31 of the rotary electric motor. At this time, the heat transfer structure 34 is formed so that the plate portion 34 </ b> P can be brought into close contact with the outer peripheral surface of the yoke portion 31. Further, the heat transfer structure 34 is formed so that the annular base portion 34A can be brought into close contact with the end surface of the yoke portion 31 when the annular base portion 34A is attached to the yoke portion 31. Further, the annular base portion 34A is formed so as to be in close contact with the flange portion.

本発明に係る伝熱構造は、たとえばアルミニウム等の高熱伝導性素材を用いて構成する。しかしながらその材質は必ずしも金属製には限定されず、高熱伝導性であれば樹脂でもよく、またその限りにおいて、その他の材料の使用を制限するものではない。   The heat transfer structure according to the present invention is configured using a high thermal conductivity material such as aluminum. However, the material is not necessarily limited to metal, and may be a resin as long as it has high thermal conductivity. Insofar as it does not limit the use of other materials.

本発明回転電動機に係る伝熱構造14(図2、3では34)はこのように構成されるため、巻線13で発生した熱量はティース部12、ヨーク部11、伝熱構造14の設けられたステータ21、取り付けフランジ部22を経由して回転電動機外に効率的に放出される。さらに詳しくは、ヨーク部11から伝熱構造14のプレート部(図2、3の34P)を介して同環状基部(同34A)へ伝達され、されにフランジ部22へと伝達される。   Since the heat transfer structure 14 (34 in FIGS. 2 and 3) according to the rotary motor of the present invention is configured in this way, the amount of heat generated in the winding 13 is provided by the teeth portion 12, the yoke portion 11, and the heat transfer structure 14. It is efficiently discharged out of the rotary motor via the stator 21 and the mounting flange portion 22. More specifically, it is transmitted from the yoke portion 11 to the annular base portion (34A) through the plate portion (34P in FIGS. 2 and 3) of the heat transfer structure 14, and then to the flange portion 22.

また、ステータ21に設けられた伝熱構造14はフランジ部22と密着しているため、フランジ部22に伝えられた熱は、効率良く機外へ放熱される。したがって、巻線13からフランジ部22までの熱抵抗は小さく、効率良く熱が伝達され、巻線13の温度上昇は低く抑えられるため、巻線の焼損する危険性が大きく減少し、回転電動機としての寿命も格段に改善し、長期化することができる。   Further, since the heat transfer structure 14 provided in the stator 21 is in close contact with the flange portion 22, the heat transmitted to the flange portion 22 is efficiently radiated to the outside of the machine. Therefore, the thermal resistance from the winding 13 to the flange portion 22 is small, heat is transferred efficiently, and the temperature rise of the winding 13 is kept low, so that the risk of burning of the winding is greatly reduced. The lifespan of this product can be significantly improved and extended.

図4、5、6、7はそれぞれ、図2に示した本発明回転電動機の要部構成を示す正面図、右側面図、平面図および背面図である。   4, 5, 6, and 7 are a front view, a right side view, a plan view, and a rear view, respectively, showing the main configuration of the rotary electric motor of the present invention shown in FIG. 2.

本発明に係る伝熱構造のプレート部の構造は、これが、ヨーク部外周に密着可能であり、かつ環状基部から延設されて一体となっているものであれば、すべて該当する。上述の説明に用いた各図では、ヨーク部外周幅方向に設けられた複数の欠切部によって、プレート部は、複数の片による櫛の歯状を形成する構造となっているが、もちろんかかる構成に限定されるものではない。たとえば、欠切部をまったく設けないキャップ状のものであっても、本発明の範囲内である。また、欠切部(片構造)を設ける場合も、その個数、間隔、形状等の具体的設計が、図示する構成に限定されるものではない。しかしながら図示した構造は、実際の製造工程上および製品仕様上、好ましい例である。   The structure of the plate portion of the heat transfer structure according to the present invention is applicable if it can be in close contact with the outer periphery of the yoke portion and is integrally extended from the annular base portion. In each figure used in the above description, the plate portion has a structure in which a plurality of notched portions provided in the outer circumferential width direction of the yoke portion form a comb tooth shape by a plurality of pieces. The configuration is not limited. For example, a cap-like shape that does not have any cutouts is within the scope of the present invention. Also, in the case where notched portions (piece structure) are provided, the specific design such as the number, interval, and shape thereof is not limited to the illustrated configuration. However, the illustrated structure is a preferable example in terms of an actual manufacturing process and product specifications.

回転電動機の小型軽量化は、その放熱冷却技術に大いに依存している。上述の通り本発明は、発熱部から機外への放熱部までの熱回路抵抗を低減でき、小型軽量化された回転電動機においても巻線部等における温度上昇を抑制でき、その結果、絶縁寿命等においても信頼性の高い回転電動機を提供することができるため、関連産業分野において、利用価値が高い発明である。   The reduction in size and weight of rotary motors greatly depends on the heat dissipation cooling technology. As described above, the present invention can reduce the thermal circuit resistance from the heat generating part to the heat radiating part to the outside of the machine, and can suppress the temperature rise in the winding part etc. even in a small and lightweight rotary electric motor. Therefore, it is an invention having high utility value in related industrial fields.

本発明の回転電動機の要部構成を示す半断面図である。It is a half sectional view showing the important section composition of the rotary motor of the present invention. 本発明の回転電動機の要部構成を示す斜視図である。It is a perspective view which shows the principal part structure of the rotary electric motor of this invention. 本発明の回転電動機の要部構成を示す分解斜視図である。It is a disassembled perspective view which shows the principal part structure of the rotary electric motor of this invention. 図2に示した本発明回転電動機の要部構成を示す正面図である。It is a front view which shows the principal part structure of this invention rotary electric motor shown in FIG. 図2に示した本発明回転電動機の要部構成を示す右側面図である。It is a right view which shows the principal part structure of the rotary electric motor of this invention shown in FIG. 図2に示した本発明回転電動機の要部構成を示す平面図である。It is a top view which shows the principal part structure of the rotary electric motor of this invention shown in FIG. 図2に示した本発明回転電動機の要部構成を示す背面図である。It is a rear view which shows the principal part structure of the rotary electric motor of this invention shown in FIG.

符号の説明Explanation of symbols

6…ロータ
11…ヨーク部
12…ティース部
13…巻線
14…伝熱構造
21…ステータ
22…取り付けフランジ部
23…絶縁材料
31…ヨーク部
34…伝熱構造
34A…環状基部
34P…プレート
6 ... Rotor 11 ... Yoke part 12 ... Teeth part 13 ... Winding 14 ... Heat transfer structure 21 ... Stator 22 ... Mounting flange 23 ... Insulating material 31 ... Yoke part 34 ... Heat transfer structure 34A ... Annular base 34P ... Plate

Claims (5)

電機子鉄心のヨーク部とティース部が分割されて形成される分割鉄心を有する回転電動機において、該ヨーク部に熱伝導性材料からなる伝熱構造が装着され、その回りを絶縁材料により封止したステータ構造であり、該伝熱構造は、該ヨーク部端面に密着可能な環状基部と、該ヨーク部外周に密着可能で該環状基部から延設されるプレート部とが一体に形成されていることを特徴とする、回転電動機。 In a rotary electric motor having a split iron core formed by dividing a yoke part and a tooth part of an armature core, a heat transfer structure made of a heat conductive material is mounted on the yoke part, and the periphery thereof is sealed with an insulating material. It is a stator structure, and the heat transfer structure is formed integrally with an annular base portion that can be in close contact with the end surface of the yoke portion and a plate portion that can be in close contact with the outer periphery of the yoke portion and that extends from the annular base portion. Rotating motor characterized by 前記伝熱構造のプレート部は、櫛の歯状に形成されていることを特徴とする、請求項1に記載の回転電動機。 The rotary electric motor according to claim 1, wherein the plate portion of the heat transfer structure is formed in a comb-teeth shape. 前記伝熱構造は、金属製または樹脂製であることを特徴とする、請求項1または2に記載の回転電動機。 The rotary electric motor according to claim 1, wherein the heat transfer structure is made of metal or resin. 前記伝熱構造の環状基部は、フランジ部と密着可能に形成されていることを特徴とする、請求項2または3に記載の回転電動機。 The rotary electric motor according to claim 2, wherein the annular base portion of the heat transfer structure is formed so as to be in close contact with the flange portion. 電機子鉄心のヨーク部とティース部が分割されて形成される分割鉄心を有する回転電動機において該ヨーク部に装着可能な伝熱構造であって、該伝熱構造は、熱伝導性材料からなり、該ヨーク部端面に密着可能な環状基部と、該ヨーク部外周に密着可能で該環状基部から延設されるプレート部とが一体に形成されてなることを特徴とする、回転電動機の伝熱構造。
A heat transfer structure attachable to the yoke part in a rotary electric motor having a split core formed by dividing a yoke part and a tooth part of an armature core, and the heat transfer structure is made of a heat conductive material, A heat transfer structure for a rotary motor, wherein an annular base portion that can be in close contact with the end surface of the yoke portion and a plate portion that can be in close contact with the outer periphery of the yoke portion and that extends from the annular base portion are integrally formed. .
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