JP2015208103A - Squirrel-cage motor - Google Patents
Squirrel-cage motor Download PDFInfo
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- JP2015208103A JP2015208103A JP2014086901A JP2014086901A JP2015208103A JP 2015208103 A JP2015208103 A JP 2015208103A JP 2014086901 A JP2014086901 A JP 2014086901A JP 2014086901 A JP2014086901 A JP 2014086901A JP 2015208103 A JP2015208103 A JP 2015208103A
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Abstract
Description
本発明は、かご形電動機に関するものである。 The present invention relates to a cage motor.
従来、簡単な構造で取り扱いが容易な電動機としてかご形電動機が知られている。 Conventionally, a squirrel-cage motor is known as a motor that has a simple structure and is easy to handle.
このかご形電動機は、例えば図４および図５に示すように、薄い珪素鋼板を打ち抜いて形成したドーナツ形の鉄心３１を積層して固定子鉄心３２を形成し、この固定子鉄心３２に形成したスロット３３に巻線３４を嵌め込んで形成した固定子３が筒状ケース２を形成するケース本体２１内の所定位置に配置されるとともに、薄い珪素鋼板を打ち抜いて形成した鉄心１１を積層した回転子鉄心１２のスロット１３に銅またはアルミニウム棒からなる回転子導体１４を差し込み、その両端を短絡線１６で結線してかご形にした回転子１を装着した軸４を、前記筒形のケース本体２１の両端に配置したブラケット２２，２３間に軸支して架設したものが知られている。 As shown in FIGS. 4 and 5, for example, the squirrel-cage motor has a stator core 32 formed by stacking donut-shaped iron cores 31 formed by punching thin silicon steel plates, and is formed on the stator core 32. A stator 3 formed by fitting a winding 34 in a slot 33 is arranged at a predetermined position in a case main body 21 forming a cylindrical case 2, and a rotation in which an iron core 11 formed by punching a thin silicon steel plate is laminated. The cylindrical case body is formed by inserting the rotor conductor 14 made of copper or aluminum rod into the slot 13 of the core 12 and connecting the opposite ends of the rotor conductor 14 with the short-circuit wire 16 to the cage 1. A structure is known in which the brackets 22 and 23 arranged at both ends of the shaft 21 are pivotally supported.
そして、前記従来のかご形電動機は、周面が円形の固定子３をケース本体２１の内側に配置しており、回転子１における軸４の鉄心１１の前方位置に装着した冷却ファン７が、冷却用の外気を筒状ケース２のブラケット２２に形成した外気取入口２６から取り入れるとともに、前記ケース本体２１、前記固定子３の外周面に形成される冷却通路２７を通過させて、前記筒状ケース２の後方に位置するブラケット２３に形成した排出口２８から放出することにより、前記回転子１の冷却を行うものであった。 And the said conventional cage motor has arrange | positioned the stator 3 with a circular surrounding surface inside the case main body 21, The cooling fan 7 with which the rotor 1 was mounted | worn in the front position of the iron core 11 of the axis | shaft 4 in the rotor 1, The outside air for cooling is taken in from the outside air inlet 26 formed in the bracket 22 of the cylindrical case 2, and is passed through the cooling passage 27 formed in the outer peripheral surface of the case body 21 and the stator 3, thereby the cylindrical shape. The rotor 1 is cooled by discharging from a discharge port 28 formed in the bracket 23 located behind the case 2.
また、特開２０００−１８４６５７号公報に、固定子鉄心の外周面に、回転子の軸線方向へ延びるとともに固定子鉄心の両端面に露出する多数の溝が並設されて歯車状に形成されており、これらの溝が冷却通路を形成するというより冷却効率を向上させたかご形電動機が提案されている。 In JP 2000-184657 A, a large number of grooves extending in the axial direction of the rotor and exposed at both end faces of the stator core are arranged in parallel on the outer peripheral surface of the stator core and formed in a gear shape. Thus, a cage electric motor has been proposed in which the cooling efficiency is improved rather than these grooves forming a cooling passage.
ところが、前記従来のかご形電動機は開放形であり、筒状ケース体に外気導入孔を形成するものであり、全閉型のかご形電動機には採用できないものであった。 However, the conventional cage motor is an open type, and an outside air introduction hole is formed in the cylindrical case body, which cannot be adopted for a fully closed cage motor.
本発明は、このような実情に鑑みてなされたものであり全閉型の高効率のかご形電動機、殊に発熱量が多い大容量の全閉型のかご形電動機を提供することを課題とするものである。 The present invention has been made in view of such circumstances, and has as its object to provide a fully-enclosed high-efficiency cage motor, particularly a large-capacity fully-enclosed cage motor that generates a large amount of heat. To do.
前記課題を解決するためなされた本発明は、固定子鉄心に形成したスロットに巻線を嵌め込んで形成した円筒形の中空部を有する固定子を筒状のケース本体とその両端に配置したブラケットからなる全閉形とした筒状ケース内の所定位置に配置し、固定した回転子鉄心のスロットに回転子導体を差し込みその両端を短絡線で結線してかご形にした回転子を前記両ブラケット間に支持された軸に固着して前記固定子の前記中空部に回転可能に配置するとともに、前記筒状ケース内の前記軸における前記回転子の前方に循環ファンを装着し、前記回転子の軸部取り付け孔に沿って回転子側循環通路が軸の長さ方向に形成されているとともに筒状ケースのケース本体と固定子の外周との間に前記軸の長さ方向に延びる固定子側循環通路が形成されて前記循環ファンにより生じる循環風が全閉型の筒状ケース内を前記固定子側循環通路から回転子側循環通路へと循環するかご形電動機において、前記筒状ケースの前方のブラケットの外側前方に被冠したカバー体により形成される冷却ファン用中空部内において前記軸に冷却ファンが装着され、且つ前記冷却ファン用中空部から後方のブラケットに貫通するとともに前記固定子側循環通路に沿って且つ前記固定子の外周に沿って複数の固定子冷却パイプを配置し、前記冷却ファンによりカバー体に形成した外気取り入れ口から取り入れた外気を前記固定子冷却パイプに導入して前記循環風および固定子を冷却するようにしたことを特徴とする。 In order to solve the above-mentioned problems, the present invention provides a cylindrical case body and brackets arranged at both ends thereof, each having a cylindrical hollow portion formed by fitting a winding into a slot formed in a stator core. Place the rotor conductor into the slot of the fixed rotor core and connect the both ends with a short-circuit wire between the brackets. Fixed to the shaft supported by the rotor and rotatably disposed in the hollow portion of the stator, and a circulation fan is mounted in front of the rotor in the shaft in the cylindrical case, and the shaft of the rotor A rotor-side circulation passage is formed in the length direction of the shaft along the part mounting hole, and the stator-side circulation extends in the length direction of the shaft between the case body of the cylindrical case and the outer periphery of the stator. A passage is formed In a squirrel-cage motor in which circulating air generated by the circulation fan circulates in a fully-closed cylindrical case from the stator-side circulation passage to the rotor-side circulation passage, on the outside front of the bracket in front of the cylindrical case A cooling fan is mounted on the shaft in the cooling fan hollow portion formed by the crowned cover body, and passes through the rear bracket from the cooling fan hollow portion and along the stator-side circulation passage and the A plurality of stator cooling pipes are arranged along the outer periphery of the stator, and outside air taken in from an outside air inlet formed in the cover body by the cooling fan is introduced into the stator cooling pipe, and the circulating air and the stator are It is characterized by cooling.
本発明によれば、従来のように間接的に固定子を冷却するのではなく、固定子を直接外気により冷却することにより効率を向上させる事ができる。 According to the present invention, the efficiency can be improved by directly cooling the stator with outside air, instead of indirectly cooling the stator as in the prior art.
また、本発明において、前記筒状ケースの前記固定子側循環通路に前記冷却ファン用中空部から前記後方のブラケットに貫通する第２の冷却パイプを前記軸方向に配置するとともに前記冷却ファン用中空部から後方のブラケットに貫通する第２の冷却パイプを前記固定子の外周に沿って互いに所定の間隔で配置し、前記冷却ファンによりカバー体に形成した外気取り入れ口から取り入れた外気を前記冷却パイプおよび第２の冷却パイプに導入して前記冷却パイプの外周に配置される前記固定子側循環通路を通過する循環風と前記外気とを熱交換して前記固定子を冷却するようにしたことで更に冷却効果を上げることが可能である。 In the present invention, a second cooling pipe penetrating from the cooling fan hollow portion to the rear bracket is disposed in the axial direction in the stator side circulation passage of the cylindrical case, and the cooling fan hollow is provided. Second cooling pipes penetrating from the section to the rear bracket are arranged at predetermined intervals along the outer periphery of the stator, and the outside air taken in from the outside air inlet formed in the cover body by the cooling fan is placed in the cooling pipe. In addition, the stator is cooled by exchanging heat between the circulating air that is introduced into the second cooling pipe and passes through the stator-side circulation passage disposed on the outer periphery of the cooling pipe and the outside air. Further, the cooling effect can be increased.
更に、本発明において、前記回転子側循環通路が回転子の軸部取り付け孔に沿って形成されている場合には筒状ケース内で循環風を効率良く循環させることができる。 Further, in the present invention, when the rotor-side circulation passage is formed along the shaft attachment hole of the rotor, the circulating air can be circulated efficiently in the cylindrical case.
本発明によれば、容量の大きな全閉型のかご形電動機において外気を利用した冷却を可能にすることで高効率とすることを可能とした。 According to the present invention, it is possible to achieve high efficiency by enabling cooling using outside air in a fully-enclosed cage electric motor having a large capacity.
以下、図面を参照して本発明に係る実施の形態のかご形電動機について説明する。 Hereinafter, a squirrel-cage motor according to an embodiment of the present invention will be described with reference to the drawings.
図１および図２は本発明の好ましい実施の形態を示すものであり、固定子鉄心３２に形成したスロット３３に巻線３４を嵌め込んで形成した円筒形の中空部を有する固定子３を外周に複数条の固定子側循環通路３５を連続して立設させたフレームを兼ねる筒状のケース本体２１とその両端に配置したブラケット２２，２３とからなる全閉形とした筒状ケース２内の所定位置に配置されている。 FIG. 1 and FIG. 2 show a preferred embodiment of the present invention. A stator 3 having a cylindrical hollow portion formed by fitting a winding 34 in a slot 33 formed in a stator core 32 is shown on the outer periphery. In the cylindrical case 2 having a fully closed shape composed of a cylindrical case main body 21 also serving as a frame in which a plurality of stator-side circulation passages 35 are continuously erected and brackets 22 and 23 disposed at both ends thereof. It is arranged at a predetermined position.
また、固定した回転子鉄心１２のスロット１３に回転子導体１４を差し込みその両端を短絡線１６で結線してかご形にした回転子１を前記両ブラケット２２，２３間に回転軸受２４，２５により回転可能に支持された軸４に固着して固定子３の中空部に回転可能に配置されている。 A rotor conductor 14 is inserted into a slot 13 of a fixed rotor core 12 and both ends thereof are connected by a short-circuit wire 16 to form a cage 1 between the brackets 22 and 23 by means of rotary bearings 24 and 25. It is fixed to a shaft 4 that is rotatably supported and is rotatably disposed in a hollow portion of the stator 3.
そして、前記筒状ケース２内の前記軸４における前記回転子１の前方に循環ファン５を装着している。 A circulation fan 5 is mounted in front of the rotor 1 on the shaft 4 in the cylindrical case 2.
さらに、回転子１の軸部取り付け孔１８に沿って回転子側循環通路１５が軸４の長さ方向に形成されているとともに、筒状ケース２のケース本体２１と固定子３の外周との間に前記軸４の長さ方向に延びる所定幅の固定子側循環通路３５が連続して形成されており、循環ファン５により生じる循環風（図示する黒矢印）が全閉型の筒状ケース２内を前記固定子側循環通路３５から回転子側循環通路１５へと循環する。 Further, a rotor-side circulation passage 15 is formed in the length direction of the shaft 4 along the shaft mounting hole 18 of the rotor 1, and the case main body 21 of the cylindrical case 2 and the outer periphery of the stator 3 are A stator-side circulation passage 35 having a predetermined width extending in the length direction of the shaft 4 is continuously formed therebetween, and the circulation wind (black arrow shown) generated by the circulation fan 5 is a fully-closed cylindrical case. 2 is circulated from the stator side circulation passage 35 to the rotor side circulation passage 15.
殊に、本実施の形態は、前記筒状ケース２の外側前方にカバー体６が被冠されて冷却ファン用中空部６１が形成されているとともにこのカバー体６の冷却ファン用中空部６１に突出させた前記軸４に冷却ファン７が装着され、且つ前記筒状ケース２の前記固定子側循環通路３５に前記冷却ファン用中空部６１から前記後方のブラケット２３に貫通する冷却パイプ８が前記軸４の長さ方向に向けて配置されている。 In particular, in the present embodiment, a cover body 6 is crowned on the outer front side of the cylindrical case 2 to form a cooling fan hollow portion 61, and the cooling fan hollow portion 61 of the cover body 6 is formed. The cooling fan 7 is mounted on the projecting shaft 4, and the cooling pipe 8 penetrating from the cooling fan hollow portion 61 to the rear bracket 23 is inserted into the stator-side circulation passage 35 of the cylindrical case 2. It arrange | positions toward the length direction of the axis | shaft 4. As shown in FIG.
特に、前記冷却パイプ８は、前記固定子側循環通路３５に沿って配置されているだけでなく、前記固定子３の外周に沿って形成された嵌挿部３８に嵌挿配置されている。 In particular, the cooling pipe 8 is not only disposed along the stator-side circulation passage 35, but is also inserted and disposed in an insertion portion 38 formed along the outer periphery of the stator 3.
従って、前記冷却ファン７によりカバー体６に形成した外気取り入れ口６２から取り入れた外気を導入して外周に位置する前記固定子側循環通路３５を通過する循環風（図示する黒矢印）と前記冷却パイプ８を流れる外気（図示する白矢印）とを熱交換して前記固定子３を冷却するだけでなく、固定子３を直接冷却することになり、きわめて高い冷却能力を発揮する。 Therefore, circulating air (black arrow in the figure) passing through the stator-side circulation passage 35 that is introduced from the outside air intake port 62 formed in the cover body 6 by the cooling fan 7 and passes through the stator-side circulation passage 35 located on the outer periphery and the cooling. This not only cools the stator 3 by exchanging heat with the outside air flowing through the pipe 8 (the white arrow shown in the figure), but also directly cools the stator 3, and exhibits a very high cooling capacity.
尚、前記両ブラケット２２，２３の冷却パイプ８が貫通する周囲部分は密封されており、筒状ケース２は全閉型に保たれている。 In addition, the peripheral part which the cooling pipe 8 of both the said brackets 22 and 23 penetrates is sealed, and the cylindrical case 2 is kept in a fully closed type.
以上の構成を有する本実施の形態では、全閉型のカバー体６内を循環する風によりカバー体６内に生じる発熱が効率良く循環することで平均化されるとともに、冷却ファン７により送風される外気が前記循環する筒状ケース２内の循環風と冷却パイプを介して効率よく接触して熱交換されることで冷却されるものであり、全閉型でありながら、従来のファンにより外気を導入して冷却効果を高めた開放型のかご形電動機と同様な高効率を発揮させることができるものである。 In the present embodiment having the above configuration, the heat generated in the cover body 6 by the air circulating in the fully-closed cover body 6 is averaged by efficient circulation and blown by the cooling fan 7. The outside air is cooled by efficiently contacting and exchanging heat with the circulating wind in the circulating cylindrical case 2 through the cooling pipe. It is possible to achieve the same high efficiency as an open squirrel-cage electric motor in which the cooling effect is enhanced by introducing the.
また、本実施の形態では、冷却ファン７ならびにカバー体６を筒状カバー２の循環ファン５側に設置したので電動機の使用に際して邪魔になることがない。 In the present embodiment, since the cooling fan 7 and the cover body 6 are installed on the circulating fan 5 side of the cylindrical cover 2, there is no hindrance when using the electric motor.
さらに、本実施の形態では、筒状ケース２内における循環風の循環方向、特に冷却パイプ８を流れる外気と熱交換する部分である固定子側循環通路３５の循環方向がファン取り付け側を上流として、その上で、前記冷却パイプ８の外気の流れる方向に合わせてあるのでさらに熱交換効率、即ち冷却効率が良好となっている。 Furthermore, in the present embodiment, the circulation direction of the circulating air in the cylindrical case 2, particularly the circulation direction of the stator-side circulation passage 35, which is a portion that exchanges heat with the outside air flowing through the cooling pipe 8, is set with the fan mounting side as the upstream side. In addition, the heat exchange efficiency, that is, the cooling efficiency is further improved because the cooling pipe 8 is adapted to the direction in which the outside air flows.
また、本実施の形態では冷却用ファンを筒状ケース２の外側に被冠する構成としたので、大径の冷却ファンが採用可能であり、優れた冷却効果を発揮させることができるものである。 Further, in the present embodiment, the cooling fan is crowned on the outside of the cylindrical case 2, so that a large-diameter cooling fan can be adopted and an excellent cooling effect can be exhibited. .
図３は本発明の異なる実施の形態を示すものであり、全体の構成は前記図１および図２に示した実施の形態とほぼ同様であり、図１に示した筒状ケース２の固定子側循環通路３５に冷却ファン用中空部６１から後方のブラケット２３に貫通する第２の冷却パイプ８１を前記軸方向に配置するとともに冷却ファン用中空部６１から後方のブラケット２３に貫通する第２の冷却パイプ８１を固定子３の外周に沿って互いに所定の間隔で配置し、冷却ファン７によりカバー体２に形成した外気取り入れ口６２から取り入れた外気を前記冷却パイプ８および第２の冷却パイプ８１に導入して前記冷却パイプ８の外周に配置される固定子側循環通路３５を通過する循環風と外気とを熱交換して固定子３を更に冷却するものである。 FIG. 3 shows a different embodiment of the present invention. The overall configuration is substantially the same as that of the embodiment shown in FIGS. 1 and 2, and the stator of the cylindrical case 2 shown in FIG. A second cooling pipe 81 penetrating from the cooling fan hollow portion 61 to the rear bracket 23 is disposed in the side circulation passage 35 in the axial direction, and the second cooling pipe 81 penetrates from the cooling fan hollow portion 61 to the rear bracket 23. The cooling pipes 81 are arranged along the outer periphery of the stator 3 at a predetermined interval, and the outside air taken in from the outside air inlet 62 formed in the cover body 2 by the cooling fan 7 is the cooling pipe 8 and the second cooling pipe 81. Then, the stator 3 is further cooled by exchanging heat between the circulating air passing through the stator-side circulation passage 35 disposed on the outer periphery of the cooling pipe 8 and the outside air.
１ 回転子、２ 筒状ケース、３ 固定子、４ 軸、５ 循環ファン、６ カバー体、７ 冷却ファン、８ 冷却パイプ、８１ 冷却パイプ、１１ 鉄心、１２ 回転子鉄心、１３ スロット、１４ 回転子導体、１５ 回転子側循環通路、１６ 短絡線、２１ ケース本体、２２，２３ ブラケット、２４，２５ 回転軸受、２６ 外気取入口、２７ 冷却通路、２８ 排出口、３１ 鉄心、３２ 固定子鉄心、３３ スロット、３４ 巻線、３５ 固定子側循環通路、３８ 嵌挿部、６１ 冷却ファン用中空部、６２ 外気取り入れ口 DESCRIPTION OF SYMBOLS 1 Rotor, 2 Cylindrical case, 3 Stator, 4 axis | shaft, 5 Circulation fan, 6 Cover body, 7 Cooling fan, 8 Cooling pipe, 81 Cooling pipe, 11 Iron core, 12 Rotor iron core, 13 Slot, 14 Rotor Conductor, 15 Rotor side circulation passage, 16 Short circuit wire, 21 Case body, 22, 23 Bracket, 24, 25 Rotary bearing, 26 Outside air inlet, 27 Cooling passage, 28 Outlet, 31 Iron core, 32 Stator core, 33 Slot, 34 windings, 35 Stator-side circulation passage, 38 Insertion section, 61 Cooling fan hollow section, 62 Outside air intake
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018064384A (en) * | 2016-10-13 | 2018-04-19 | 東芝三菱電機産業システム株式会社 | Totally enclosed fan cooled type rotary electric machine |
| CN110829724A (en) * | 2019-11-18 | 2020-02-21 | 苏州大成有方数据科技有限公司 | High-precision stepping motor capable of dissipating heat quickly and working method thereof |
| KR102100169B1 (en) * | 2019-03-26 | 2020-04-13 | 김형철 | Cooling structure of two-way motor |
| WO2020197269A1 (en) * | 2019-03-26 | 2020-10-01 | 김형철 | Cooling structure of motor |
| CN113965019A (en) * | 2021-10-25 | 2022-01-21 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
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| JPS5595447U (en) * | 1978-12-26 | 1980-07-02 | ||
| JP2000184657A (en) * | 1998-12-11 | 2000-06-30 | Mitsui Miike Mach Co Ltd | Squirrel-cage motor |
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|---|---|---|---|---|
| JPS5529299A (en) * | 1978-08-23 | 1980-03-01 | Siemens Ag | Totally enclosed electric machine and method of assembling same |
| JPS5595447U (en) * | 1978-12-26 | 1980-07-02 | ||
| JP2000184657A (en) * | 1998-12-11 | 2000-06-30 | Mitsui Miike Mach Co Ltd | Squirrel-cage motor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018064384A (en) * | 2016-10-13 | 2018-04-19 | 東芝三菱電機産業システム株式会社 | Totally enclosed fan cooled type rotary electric machine |
| CN107947468A (en) * | 2016-10-13 | 2018-04-20 | 东芝三菱电机产业***株式会社 | Full-closed external fan shape electric rotating machine |
| KR102100169B1 (en) * | 2019-03-26 | 2020-04-13 | 김형철 | Cooling structure of two-way motor |
| WO2020197270A1 (en) * | 2019-03-26 | 2020-10-01 | 김형철 | Two-way motor cooling structure |
| WO2020197269A1 (en) * | 2019-03-26 | 2020-10-01 | 김형철 | Cooling structure of motor |
| CN110829724A (en) * | 2019-11-18 | 2020-02-21 | 苏州大成有方数据科技有限公司 | High-precision stepping motor capable of dissipating heat quickly and working method thereof |
| CN113965019A (en) * | 2021-10-25 | 2022-01-21 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
| CN113965019B (en) * | 2021-10-25 | 2024-01-23 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
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