JP5939394B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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JP5939394B2
JP5939394B2 JP2012201721A JP2012201721A JP5939394B2 JP 5939394 B2 JP5939394 B2 JP 5939394B2 JP 2012201721 A JP2012201721 A JP 2012201721A JP 2012201721 A JP2012201721 A JP 2012201721A JP 5939394 B2 JP5939394 B2 JP 5939394B2
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stator
stator frame
cooling fin
fastening bolt
peripheral surface
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JP2014057467A (en
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明秀 真下
明秀 真下
昌博 星
昌博 星
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Fuji Electric Co Ltd
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Description

本発明は、風力発電機などに適用する大形の回転電機に関し、詳しくは固定子組立構造に係わる。   The present invention relates to a large rotating electric machine applied to a wind power generator or the like, and more particularly to a stator assembly structure.

低速で大トルクの回転電機、例えば直接駆動方式の風力発電機などは、多極化により高効率、小形化を志向することが一般的である。その結果、固定子は軸方向に短く径方向に大きくなる。   Low-speed, large-torque rotating electrical machines, such as direct-drive wind power generators, generally aim at high efficiency and downsizing through multipolarization. As a result, the stator is short in the axial direction and large in the radial direction.

大径化した固定子の製作を容易にするために、固定子鉄心を複数個に分割して固定子枠に収納した組立構造の固定子が一般に採用されており、その具体例として固定子鉄心の分割コアを固定子枠（フレーム）の内周に沿って配列し、各分割コアを個々に締結ボルトを介して固定子枠に固定した組立構造が知られている（例えば、特許文献１参照）。   In order to facilitate the manufacture of large-diameter stators, a stator with an assembly structure in which the stator core is divided into a plurality of parts and housed in a stator frame is generally adopted, and a specific example is the stator core. An assembly structure is known in which the divided cores are arranged along the inner periphery of a stator frame (frame), and each divided core is individually fixed to the stator frame via a fastening bolt (see, for example, Patent Document 1). ).

また、直接駆動方式の風力発電機などにおいては、一般に風冷方式を採用して前記固定子枠の外周面上に冷却フィンを布設し、外部の自然風を前記冷却フィンに通風して冷却する場合が多い。冷却フィンの一般的な構造例として固定子枠の外周面に多数条の冷却フィンを溶接接合する（例えば、特許文献２参照）、あるいは鋳鉄の鋳物で作られた固定子枠の周面に冷却フィンを一体に鋳造した構造（例えば、特許文献３参照）などが知られている。   In direct drive type wind power generators and the like, generally, an air cooling method is adopted, cooling fins are laid on the outer peripheral surface of the stator frame, and external natural air is passed through the cooling fins for cooling. There are many cases. As a general structural example of the cooling fin, a large number of cooling fins are welded and joined to the outer peripheral surface of the stator frame (for example, see Patent Document 2), or the peripheral surface of the stator frame made of cast iron casting is cooled. A structure in which fins are integrally cast (for example, see Patent Document 3) is known.

特開２０１１−１２０３５０号公報JP 2011-120350 A 特開２０００−７８７９７号公報JP 2000-78797 A 特開２００１−２８８５８号公報JP 2001-28858 A

ところで、前記した従来の回転電機の固定子組立構造では次記のような課題がある。すなわち固定子鉄心の分割コアを固定子枠の内周にボルト締結した組立構造（特許文献１参照）では、固定子枠に穿孔したボルト貫通穴を通して締結ボルトを固定子枠の外周側から分割コアに螺合しているために、風雨に曝される屋外設置の環境では雨水が固定子枠のボルト貫通穴を伝わって内部の固定子鉄心に浸入するおそれがあり、何らかの防水対策が必須である。また、固定子枠の外周面に布設する冷却フィンについても、風力発電機などの大形な回転電機に特許文献２，３に開示されている構造を採用しようとすると、製作工数が多くなって製作コストが嵩む問題がある。   By the way, the above-described conventional stator assembly structure of a rotating electric machine has the following problems. That is, in an assembly structure (see Patent Document 1) in which a stator core split core is bolted to the inner periphery of the stator frame (see Patent Document 1), the fastening bolt is split from the outer periphery side of the stator frame through a bolt through hole drilled in the stator frame. Since it is screwed to the rain, rainwater may travel through the bolt through holes in the stator frame and enter the internal stator iron core, and some measures against waterproofing are essential. . Also, with regard to the cooling fins laid on the outer peripheral surface of the stator frame, if the structure disclosed in Patent Documents 2 and 3 is adopted for a large rotating electric machine such as a wind power generator, the number of manufacturing steps increases. There is a problem that the manufacturing cost increases.

本発明は上記の点に鑑みなされたものであり、その目的は、特許文献１に開示されている分割コアの締結ボルトによる組立構造を採用しつつ、その固定子枠の外周面に布設した別部品の冷却フィンを巧みに利用して前記締結ボルトに対する高い防水性の確保が図れるように改良した固定子組立構造を備えた回転電機を提供することにある。   The present invention has been made in view of the above points, and an object of the present invention is to adopt an assembly structure using a fastening bolt of a split core disclosed in Patent Document 1 and laying on the outer peripheral surface of the stator frame. An object of the present invention is to provide a rotating electrical machine having an improved stator assembly structure so as to ensure high waterproofness against the fastening bolt by skillfully utilizing cooling fins of parts.

上記目的を達成するために、本発明によれば、電磁鋼板の積層体になる固定子鉄心を固定子枠の内周に固定するとともに、該固定子枠の外周面に冷却フィンを布設した風冷式の回転電機であって、前記固定子枠の外周側から締結ボルトを螺合して固定子鉄心を固定子枠に固定したものにおいて、
平行に並ぶ複数枚のフィンを取付基板上に起立形成して一体化した構造体で前記冷却フィンの単位ブロックを構成し、該冷却フィンの単位ブロックを固定子枠の外周面に布設するに際して、前記締結ボルトを外方から覆うように単位ブロックの取付基板を固定子枠の周面に重ねて合わせて固着し（請求項１）、具体的には次記のような態様で構成する。
（１）前記固定子鉄心は周方向に配列した分割コアの集合体になり、かつ各分割コアが個々に締結ボルトを介して固定子枠に固定されている（請求項２）。
（２）前記冷却フィンの単位ブロックには、その取付基板の背面に前記締結ボルトのボルト頭が没入するくぼみ穴を形成する（請求項３）。
（３）前記冷却フィンの単位ブロックを、締結ボルトもしくは溶接接合により固定子枠の外周面上に固着する（請求項４）。
（４）前記固定子枠の周面と冷却フィン単位ブロックの取付基板との間に高伝熱性樹脂もしくは高伝熱性樹脂シートを介装する（請求項５）。 In order to achieve the above object, according to the present invention, a stator core that is a laminate of electromagnetic steel sheets is fixed to the inner periphery of the stator frame, and a cooling fin is installed on the outer peripheral surface of the stator frame. A cold rotating electric machine, in which a fastening bolt is screwed from the outer peripheral side of the stator frame to fix the stator core to the stator frame,
When a unit block of the cooling fin is configured with a structure in which a plurality of fins arranged in parallel are erected on a mounting substrate and integrated, and the unit block of the cooling fin is laid on the outer peripheral surface of the stator frame, The mounting substrate of the unit block is overlapped and fixed to the peripheral surface of the stator frame so as to cover the fastening bolt from the outside (Claim 1), and specifically, configured in the following manner.
(1) The stator core is an aggregate of divided cores arranged in the circumferential direction, and each divided core is individually fixed to a stator frame via a fastening bolt (Claim 2).
(2) In the unit block of the cooling fin, a recess hole is formed in the back surface of the mounting board, in which the bolt head of the fastening bolt is immersed.
(3) The cooling fin unit block is fixed onto the outer peripheral surface of the stator frame by fastening bolts or welding.
(4) A high heat transfer resin or a high heat transfer resin sheet is interposed between the peripheral surface of the stator frame and the mounting substrate of the cooling fin unit block.

上記構成によれば、固定子枠の内周側に固定子鉄心をボルト締結した上で、冷却フィンの単位ブロックを固定子枠の外周面に配列して固着することにより、固定子鉄心を固定子枠に固定した締結ボルトのボルト貫通穴が冷却フィン単位ブロックの取付基板で塞がれて雨水の浸入を防ぐことができる。なお、この冷却フィンの単位ブロックは、アルミダイキャストなどの工法で簡単に製作できる。   According to the above configuration, the stator core is fixed by arranging and fixing the cooling fin unit blocks on the outer peripheral surface of the stator frame after the stator core is bolted to the inner peripheral side of the stator frame. The bolt through hole of the fastening bolt fixed to the child frame is blocked by the mounting board of the cooling fin unit block, and rainwater can be prevented from entering. The cooling fin unit block can be easily manufactured by a method such as aluminum die casting.

また、固定子枠の周面と冷却フィン単位ブロックの取付基板との間に例えばパテ状の高伝熱性樹脂、もしくは高伝熱性樹脂シートを介装することで、固定子枠と冷却フィンとの間の高い伝熱性を確保しつつ、ボルト貫通穴を防水する高い封止効果が得られる。   Moreover, by putting a putty-like high heat transfer resin or a high heat transfer resin sheet between the peripheral surface of the stator frame and the mounting substrate of the cooling fin unit block, the stator frame and the cooling fin The high sealing effect which waterproofs a bolt through-hole is acquired, ensuring high heat conductivity in between.

本発明の実施例による回転電機の固定子組立構造を示す周方向の部分断面図である。It is a fragmentary sectional view of the circumferential direction which shows the stator assembly structure of the rotary electric machine by the Example of this invention. 図１における冷却フィン単位ブロックの正面図であるIt is a front view of the cooling fin unit block in FIG. 図２の平面図である。FIG. 3 is a plan view of FIG. 2.

以下、本発明の実施の形態を図１〜図３に示す実施例に基づいて説明する。
図示実施例において、１は電磁鋼板の積層体になる分割コア形の固定子鉄心、２は固定子鉄心１を囲繞してその外周側に配した鋳鉄製の固定子枠、３は固定子枠２の外周面上に配置した冷却フィン、４は固定子鉄心１を固定子枠２に固定する締結ボルト（以下「固定鉄心締結ボルト」とも称する）、５は冷却フィン３の単位ブロック（詳細構造を後記する）を固定子枠２に固定する締結ボルト（以下「冷却フィン締結ボルト」とも称する）、６は固定子鉄心１を構成する分割コア、７は冷却フィン３と固定子枠２との間に介装した高伝熱性の樹脂シート、８は隣接する分割コア６の相互間の分割部である。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the examples shown in FIGS.
In the illustrated embodiment, reference numeral 1 denotes a split core type stator core that is a laminate of electromagnetic steel sheets, 2 denotes a cast iron stator frame that surrounds the stator core 1 and is arranged on the outer peripheral side thereof, and 3 denotes a stator frame Cooling fins 4 disposed on the outer peripheral surface 2, 4 is a fastening bolt (hereinafter also referred to as “fixed core fastening bolt”) for fixing the stator core 1 to the stator frame 2, and 5 is a unit block (detailed structure) of the cooling fin 3. ) Is fixed to the stator frame 2 (hereinafter also referred to as “cooling fin fastening bolt”), 6 is a split core constituting the stator core 1, 7 is a cooling fin 3 and stator frame 2 A highly heat conductive resin sheet 8 interposed therebetween is a divided portion between adjacent divided cores 6.

ここで、固定子鉄心１は周方向に分割して固定子枠２の内周面に配列した前記分割コア６の集合体からなり、その分割コア６には扇形状の継鉄部６ａ、該継鉄部６ａから内周側に延出する複数のティース部６ｂ、およびティース部６ｂの間に画成した固定子コイル（不図示）を収納する複数のスロット６ｃが形成され、さらに継鉄部６ａの外周面には前記固定鉄心締結ボルト４が螺合するダブテールキー９を嵌挿するダブテール形状の凹溝（以下「ダブテール溝」とも称する）６ｄが周上に分散形成されている。   Here, the stator core 1 is composed of an assembly of the divided cores 6 divided in the circumferential direction and arranged on the inner peripheral surface of the stator frame 2, and the divided core 6 includes a fan-shaped yoke portion 6a, A plurality of teeth 6b extending from the yoke portion 6a to the inner peripheral side, and a plurality of slots 6c for accommodating a stator coil (not shown) defined between the teeth 6b are formed. A dovetail-shaped concave groove (hereinafter also referred to as “dovetail groove”) 6d into which the dovetail key 9 into which the fixed iron core fastening bolt 4 is screwed is inserted and formed on the outer peripheral surface of 6a.

なお、ダブテールキー９は、図１に示されるように略台形状の断面を有する楔状部材であり、固定鉄心締結ボルト４のためのタップ穴（以下「固定鉄心締結ボルト用タップ穴」とも称する）９ａが穿設されている。このダブテールキー９が、分割コア６の外周面に形成されたダブテール形状、すなわち分割コア６の内径側ほど幅が広くなる略台形状の断面を有する凹溝（ダブテール溝）６ｄに嵌挿される。   The dovetail key 9 is a wedge-shaped member having a substantially trapezoidal cross section as shown in FIG. 1, and is a tap hole for the fixed core fastening bolt 4 (hereinafter also referred to as “fixed core fastening bolt tap hole”). 9a is perforated. The dovetail key 9 is fitted into a dovetail shape (dovetail groove) 6 d having a dovetail shape formed on the outer peripheral surface of the split core 6, that is, a substantially trapezoidal cross section that becomes wider toward the inner diameter side of the split core 6.

また、固定子枠２には固定子鉄心締結ボルト４のためのボルト貫通穴（以下「固定子鉄心締結ボルト用貫通穴」とも称する）２ａが穿設されているとともに、固定子枠２の外周面には冷却フィン締結ボルト５のためのタップ穴（以下「冷却フィン締結ボルト用タップ穴」とも称する）２ｂが穿設されている。   The stator frame 2 is provided with bolt through holes (hereinafter also referred to as “stator core fastening bolt through holes”) 2 a for the stator core fastening bolts 4, and the outer periphery of the stator frame 2. A tapped hole (hereinafter also referred to as “tap hole for cooling fin fastening bolt”) 2b for the cooling fin fastening bolt 5 is formed in the surface.

一方、冷却フィン３は、図２，図３で示すように、断面円弧状の取付基板３ａの上面に軸方向に沿って延在する複数枚のフィン３ｂを起立形成したアルミダイキャスト等で製作された別部品で単位ブロックを構成している。また、その取付基板３ａの背面には前記固定鉄心締結ボルト４の配列に合わせてそのボルト頭４ａが没入するくぼみ穴３ｃが形成され、さらにこのくぼみ穴３ｃからずれた位置には、複数箇所に分散して取付基板３ａを固定子枠２の外周面に締結する冷却フィン締結ボルト５のためのボルト貫通穴（以下「冷却フィン締結ボルト用貫通穴」とも称する）３ｄが穿設されている。   On the other hand, as shown in FIGS. 2 and 3, the cooling fin 3 is manufactured by aluminum die casting or the like in which a plurality of fins 3b extending in the axial direction are formed upright on the upper surface of the mounting board 3a having an arc cross section. The unit block is composed of the separated parts. In addition, recessed holes 3c into which the bolt heads 4a are inserted are formed on the back surface of the mounting board 3a in accordance with the arrangement of the fixed iron core fastening bolts 4, and at positions shifted from the recessed holes 3c, there are a plurality of positions. Bolt through holes (hereinafter also referred to as “cooling fin fastening bolt through holes”) 3 d are formed for the cooling fin fastening bolts 5 that are dispersed and fastened to the outer peripheral surface of the stator frame 2.

次に前記した固定子の組立手順を説明する。まず、固定子鉄心１の各分割コア６には固定子コイル（不図示）を巻装し、さらに分割コア６の外周面に形成されたダブテール溝６ｄにはダブテールキー９を嵌挿しておく。次に、この分割コア６を固定子枠２の内周面に位置決めして重ね合わせ、固定枠２の外周側から固定子鉄心締結ボルト用貫通穴２ａを挿通した固定子鉄心締結ボルト４を、ダブテールキー９の固定鉄心締結ボルト用タップ穴９ａに螺合して、分割コア６を固定枠２の内周面の所定位置に締結する。この状態で、次に前記固定子鉄心締結ボルト４を外方から覆うように固定子枠２の外周面上に冷却フィン３の単位ブロックを重ね、前記固定子鉄心締結ボルト４のボルト頭４ａを取付基板３ａのくぼみ穴３ｃに嵌入させた上で、取付基板３ａの外周側から冷却フィン締結ボルト用貫通穴３ｄを挿通した冷却フィン締結ボルト５を、固定子枠２の冷却フィン締結ボルト用タップ穴２ｂに螺合して、取付基板３ａを固定子枠２の外周面に固着する。なお、冷却フィン締結ボルト５は固定子枠２を貫通しないようにその軸長を設定している。   Next, the procedure for assembling the stator will be described. First, a stator coil (not shown) is wound around each split core 6 of the stator core 1, and a dovetail key 9 is inserted into a dovetail groove 6 d formed on the outer peripheral surface of the split core 6. Next, the divided core 6 is positioned and overlapped on the inner peripheral surface of the stator frame 2, and the stator core fastening bolt 4 inserted through the stator core fastening bolt through hole 2 a from the outer peripheral side of the fixed frame 2, The split core 6 is fastened to a predetermined position on the inner peripheral surface of the fixed frame 2 by screwing into the fixed core fastening bolt tap hole 9 a of the dovetail key 9. In this state, the unit block of the cooling fin 3 is overlaid on the outer peripheral surface of the stator frame 2 so as to cover the stator core fastening bolt 4 from the outside, and the bolt head 4a of the stator core fastening bolt 4 is attached. The cooling fin fastening bolt 5 of the stator frame 2 is inserted into the cooling fin fastening bolt 5 inserted through the through hole 3d for the cooling fin fastening bolt from the outer peripheral side of the mounting substrate 3a after being inserted into the recessed hole 3c of the mounting substrate 3a. The mounting substrate 3a is fixed to the outer peripheral surface of the stator frame 2 by screwing into the hole 2b. The axial length of the cooling fin fastening bolt 5 is set so as not to penetrate the stator frame 2.

また、図示実施例では、冷却フィン３の取付基板３ａと固定子枠２とが密着し合うように両者間に高伝熱性の樹脂シート７を介装しており、これにより冷却フィンと固定子枠との間の高い伝熱性を確保しつつ、固定子鉄心締結ボルト４に対する防水封止効果を高めることができる。なお、樹脂シート７を用いる代わりにペースト状の高伝熱性樹脂材を塗布しても同様な効果が得られる。また、図示実施例では冷却フィン３を冷却フィン締結ボルト５で固定子枠２に固着しているが、冷却フィン締結ボルト５を用いる代わりに、冷却フィン３の取付基板３ａの周縁に沿って固定子枠２との間を溶接接合（シーム溶接，ＴＩＧ溶接）することもできる。   Further, in the illustrated embodiment, a highly heat-conductive resin sheet 7 is interposed between the cooling fin 3 so that the mounting substrate 3a of the cooling fin 3 and the stator frame 2 are in close contact with each other, whereby the cooling fin and the stator are arranged. The waterproof sealing effect with respect to the stator core fastening bolt 4 can be enhanced while ensuring high heat transfer between the frame and the frame. The same effect can be obtained by applying a paste-like highly heat-conductive resin material instead of using the resin sheet 7. In the illustrated embodiment, the cooling fins 3 are fixed to the stator frame 2 with the cooling fin fastening bolts 5. Instead of using the cooling fin fastening bolts 5, the cooling fins 3 are fixed along the periphery of the mounting substrate 3 a. It is also possible to weld-join (seam welding, TIG welding) with the child frame 2.

上記の固定子組立構造によれば、固定子鉄心１を固定子枠２に固定した固定子鉄心締結ボルト４のためのボルト貫通穴（固定子鉄心締結ボルト用貫通穴）２ａを冷却フィン３の取付基板３ａにより覆って外部から雨水が機内側に浸入するのを確実に防ぐことができる。   According to the stator assembly structure described above, the bolt through hole (the stator core fastening bolt through hole) 2 a for the stator core fastening bolt 4 that fixes the stator core 1 to the stator frame 2 is formed on the cooling fin 3. It is possible to reliably prevent rainwater from entering the inside of the apparatus by covering with the mounting substrate 3a.

１ 固定子鉄心
２ 固定子枠
２ａ 固定子鉄心締結ボルト用貫通穴
２ｂ 冷却フィン締結ボルト用タップ穴
３ 冷却フィン
３ａ 取付基板
３ｂ フィン
３ｃ くぼみ穴
３ｄ 冷却フィン締結ボルト用貫通穴
４ 固定子鉄心締結ボルト
４ａ ボルト頭
５ 冷却フィン締結ボルト
６ 分割コア
６ａ 継鉄部
６ｂ ティース部
６ｃ スロット
６ｄ ダブテール溝
７ 高伝熱性樹脂シート
８ 分割部
９ ダブテールキー
９ａ 固定子鉄心締結ボルト用タップ穴 DESCRIPTION OF SYMBOLS 1 Stator core 2 Stator frame 2a Stator core fastening bolt through hole 2b Cooling fin fastening bolt tap hole 3 Cooling fin 3a Mounting board 3b Fin 3c Recessed hole 3d Cooling fin fastening bolt through hole 4 Stator core fastening bolt 4a Bolt head 5 Cooling fin fastening bolt 6 Split core 6a Joint portion 6b Teeth portion 6c Slot 6d Dovetail groove 7 High heat transfer resin sheet 8 Split portion 9 Dovetail key 9a Tap hole for stator core fastening bolt

Claims (5)

電磁鋼板の積層体になる固定子鉄心を固定子枠の内周に固定するとともに、該固定子枠の外周面に冷却フィンを布設した風冷式の回転電機であって、前記固定子枠の外周側から締結ボルトを螺合して固定子鉄心を固定子枠に固定したものにおいて、
平行に並ぶ複数枚のフィンを取付基板上に起立形成して一体化した構造体で前記冷却フィンの単位ブロックを構成し、該冷却フィンの単位ブロックを固定子枠の外周面に布設するに際して、前記締結ボルトを外方から覆うように単位ブロックの取付基板を固定子枠の周面に重ねて合わせて固着したことを特徴とする回転電機。 A stator iron core, which is a laminate of electromagnetic steel plates, is fixed to the inner periphery of the stator frame, and is an air-cooled rotary electric machine in which cooling fins are installed on the outer peripheral surface of the stator frame, In what fixed the stator core to the stator frame by screwing the fastening bolt from the outer peripheral side,
When a unit block of the cooling fin is configured with a structure in which a plurality of fins arranged in parallel are erected on a mounting substrate and integrated, and the unit block of the cooling fin is laid on the outer peripheral surface of the stator frame, A rotating electrical machine characterized in that a mounting substrate of a unit block is overlapped and fixed to a peripheral surface of a stator frame so as to cover the fastening bolt from the outside. 請求項１に記載の回転電機において、固定子鉄心は周方向に配列した分割コアの集合体になり、かつ各分割コアが個々に締結ボルトを介して固定子枠に固定されていることを特徴とする回転電機。   2. The rotating electrical machine according to claim 1, wherein the stator core is an assembly of divided cores arranged in the circumferential direction, and each divided core is individually fixed to the stator frame via a fastening bolt. Rotating electric machine. 請求項１または２のいずれかの項に記載の回転電機において、冷却フィンの単位ブロックには、その取付基板の背面に前記締結ボルトのボルト頭が没入するくぼみ穴を形成したことを特徴とする回転電機。   3. The rotating electrical machine according to claim 1, wherein the unit block of the cooling fin is formed with a recessed hole into which a bolt head of the fastening bolt is inserted in a back surface of the mounting board. Rotating electric machine. 請求項１ないし３のいずれかの項に記載の回転電機において、冷却フィンの単位ブロックを締結ボルトもしくは溶接接合により固定子枠の外周面上に固着したことを特徴とする回転電機。   The rotating electrical machine according to any one of claims 1 to 3, wherein a unit block of the cooling fin is fixed on the outer peripheral surface of the stator frame by fastening bolts or welding joints. 請求項１ないし４のいずれかの項に記載の回転電機において、固定子枠の周面と冷却フィン単位ブロックの取付基板との間に高伝熱性樹脂もしくは高伝熱性樹脂シートを介装したことを特徴とする回転電機。   5. The rotating electrical machine according to claim 1, wherein a high heat transfer resin or a high heat transfer resin sheet is interposed between the peripheral surface of the stator frame and the mounting substrate of the cooling fin unit block. Rotating electric machine.
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WO2016096042A1 (en) * 2014-12-19 2016-06-23 Arcelik Anonim Sirketi Individual cooling fin and an electric motor having the same
CN107769471A (en) * 2017-10-16 2018-03-06 常州朗奇威电器有限公司 A kind of stator core construction for motor
JP7153622B2 (en) * 2019-08-26 2022-10-14 東芝三菱電機産業システム株式会社 Stator torque transmission structure, electric motor drive system, and method of assembling stator torque transmission structure
CN115912698A (en) * 2023-01-09 2023-04-04 恒业智能驱动(杭州)股份有限公司 Circular motor

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