JP3508206B2 - Motor for driving vehicle - Google Patents
Motor for driving vehicleInfo
- Publication number
- JP3508206B2 JP3508206B2 JP11457794A JP11457794A JP3508206B2 JP 3508206 B2 JP3508206 B2 JP 3508206B2 JP 11457794 A JP11457794 A JP 11457794A JP 11457794 A JP11457794 A JP 11457794A JP 3508206 B2 JP3508206 B2 JP 3508206B2
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- electric motor
- refrigerant
- cooling chamber
- end frame
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Cooling System (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気自動車に搭載する
車両駆動用電動機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor for driving a vehicle mounted on an electric vehicle.
【０００２】[0002]
【従来の技術】電気自動車の駆動系を構成する電動機や
機器等の小型軽量化は、特開平５−２１９６０７号公報
及び実開平５−２５９８８号公報等により、インバータ
一体型電動機として試みられている。インバータ及び電
動機は通電により発熱するため、これらを冷却する冷却
システムを必須とするが、冷却システムを含めた総合的
なインバータ一体型電動機の小型軽量化の試みはなされ
ていない。2. Description of the Related Art Reduction in size and weight of electric motors and devices that constitute a drive system of an electric vehicle has been attempted as an inverter-integrated electric motor according to JP-A-5-219607 and JP-A-5-25988. . Since the inverter and the electric motor generate heat when energized, a cooling system for cooling them is indispensable, but no attempt has been made to reduce the size and weight of the integrated inverter-integrated electric motor including the cooling system.
【０００３】[0003]
【発明が解決しようとする課題】電気自動車の駆動系の
冷却システムは、車両の居住性を高めるために、広い放
熱面積を必要としない液冷方式が採用されつつある。と
ころが、図５に示すように、冷媒を用いる液冷却方式に
より蓄電池ａの直流電力を交流電力に変換するインバー
タｂを冷却する場合は、冷却装置ｃと冷媒の熱を放出す
る熱交換器ｄとの間に冷媒循環経路ｅを構成するととも
に、冷媒循環用の電動ポンプｆ等を必須とする。このた
め、冷却システムの車両に対する占有容積が大きくなる
ばかりでなく、居住区画への熱伝導を遮断する対策が必
要となって小型化が容易でない。さらに、車両駆動用電
動機ｇをも上記液冷却方式で冷却しようとすると、電動
ポンプｆや熱交換器ｄが大型化してしまい、車両駆動用
電動機ｇとインバータｂを一体化し、さらに減速機ｈや
同軸型のデファレンシャルギヤｉ等の動力伝達機構をコ
ンパクトに纏めて配置しても、前記冷却システムを含め
た駆動系全体の小型化は一層困難になる等の問題点があ
る。本発明は上記問題点を解決するためになされたもの
で、インバータ一体型電動機の冷却システムを含めた全
体構成を小型軽量化した電気自動車の駆動用電動機を提
供することを目的とする。As a cooling system for a drive system of an electric vehicle, a liquid cooling system which does not require a large heat dissipation area is being adopted in order to enhance the comfortability of the vehicle. However, as shown in FIG. 5, when cooling the inverter b that converts the DC power of the storage battery a into AC power by a liquid cooling method using a refrigerant, a cooling device c and a heat exchanger d that releases the heat of the refrigerant are used. A refrigerant circulation path e is formed between the two, and an electric pump f for circulating the refrigerant is essential. Therefore, not only the volume occupied by the cooling system for the vehicle becomes large, but also a measure for cutting off heat conduction to the living space is required, which makes it difficult to reduce the size. Furthermore, if the vehicle driving electric motor g is also cooled by the liquid cooling method, the electric pump f and the heat exchanger d become large in size, the vehicle driving electric motor g and the inverter b are integrated, and the speed reducer h and Even if the power transmission mechanisms such as the coaxial type differential gear i are compactly arranged, there is a problem that it becomes more difficult to downsize the entire drive system including the cooling system. The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric motor drive motor for an electric vehicle in which the overall configuration including a cooling system for an inverter-integrated electric motor is reduced in size and weight.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
の請求項１に記載の本発明の車両駆動用電動機は、直流
電力を交流電力に変換するインバータと、該インバータ
から供給される交流電力により回転する電動機を一体に
組み込むとともに、前記電動機の回転子軸を支承するエ
ンドフレームに冷却手段の冷媒を循環させて前記インバ
ータを冷却するインバータ冷却室を一体形成した車両駆
動用電動機であって、 前記エンドフレームに一体形成し
た補強用リブを前記インバータ冷却室に突出させるとと
もに、該補強用リブにより循環する前記冷媒を案内する
ようになっており、 前記補強用リブは、前記エンドフレ
ームの半径方向に複数個放射状に形成するとともに、何
れか一個の補強用リブを前記インバータ冷却室を区画す
る区画壁とし、他の補強用リブは前記インバータ冷却室
への突出長さを前記半径方向で変化させたことを特徴と
する。According to a first aspect of the present invention, there is provided an electric motor for driving a vehicle according to claim 1, wherein an inverter for converting DC power into AC power and AC power supplied from the inverter. A vehicle drive in which an electric motor that rotates by means of an electric motor is integrally incorporated, and an inverter cooling chamber that cools the inverter by circulating a refrigerant of a cooling means in an end frame that supports a rotor shaft of the electric motor
A dynamic electric motor, which is integrally formed with the end frame.
When the reinforcing ribs are projected into the inverter cooling chamber,
Mainly, the reinforcing rib guides the circulating refrigerant.
And the reinforcing ribs are
In addition to forming multiple radial patterns in the radial direction of the
One of the reinforcing ribs divides the inverter cooling chamber.
Partition wall and other reinforcing ribs are the inverter cooling chamber
It is characterized in that the protrusion length to the is changed in the radial direction .
【０００５】[0005]
【０００６】[0006]
【０００７】上記目的を達成するための請求項２に記載
の本発明の車両駆動用電動機は、上記請求項１記載の構
成において、前記インバータ冷却室は、前記エンドフレ
ームに支承される前記回転子軸が挿通されるドーナツ形
状とするとともに、冷媒流入孔と冷媒流出孔とを前記イ
ンバータ冷却室の区画壁となる補強用リブの両側に形成
したことを特徴とする。According to a second aspect of the present invention, there is provided the vehicle driving electric motor according to the first aspect , wherein the inverter cooling chamber is supported by the end frame. The shaft has a donut shape through which the shaft is inserted, and the refrigerant inflow hole and the refrigerant outflow hole are formed on both sides of a reinforcing rib serving as a partition wall of the inverter cooling chamber.
【０００８】上記目的を達成するための請求項３に記載
の本発明の車両駆動用電動機は、上記請求項１記載の構
成において、前記電動機と減速機構及び差動機構とを、
前記回転子軸の軸線に沿って直列的に配置して一体化し
たことを特徴とする。According to a third aspect of the present invention, there is provided a vehicle driving electric motor according to the first aspect, wherein the electric motor, the speed reducing mechanism, and the differential mechanism are:
It is characterized in that they are arranged in series along the axis of the rotor shaft and integrated.
【０００９】[0009]
【作用及び発明の効果】請求項１記載の本発明の車両駆
動用電動機によれば、電動機の回転子軸を支承するエン
ドフレームに一体形成したインバータ冷却室に、冷却手
段の冷媒を流通させてインバータを冷却する。従って、
電動機の軸方向にインバータを配置してもエンドフレー
ムからの放熱が妨げられることがないから、電動機を大
型化して放熱面積を拡大する必要がなく、全体構成を軸
方向で纏めることにより小型化できる効果がある。According to the electric motor for driving a vehicle of the present invention as set forth in claim 1, the refrigerant of the cooling means is circulated in the inverter cooling chamber integrally formed with the end frame which supports the rotor shaft of the electric motor. Cool the inverter. Therefore,
Even if the inverter is arranged in the axial direction of the electric motor, heat radiation from the end frame is not hindered, so there is no need to enlarge the electric motor to expand the heat radiation area, and the overall configuration can be miniaturized by putting it in the axial direction. effective.
【００１０】また、エンドフレームに一体形成しインバ
ータ冷却室に突出する補強用リブにより、該インバータ
冷却室内を流通する冷媒が案内される。補強用リブを形
成して剛性を高めることにより、回転子軸を支承してス
ラスト荷重を受けるエンドフレームの肉厚を薄くするこ
とができ、電動機からインバータ冷却室への熱伝達を速
めエンドフレームからの放熱を促進して冷却効率を高め
ることができる。また、補強用リブにより冷媒が案内さ
れるから熱交換が促進され冷却効率を高めることができ
る効果がある。 Further, the reinforcing rib that projects integrally formed inverter cooling chamber to the end frame, the refrigerant flowing the inverter cooling chamber is guided. By forming reinforcing ribs to increase rigidity, it is possible to reduce the wall thickness of the end frame that supports the rotor shaft and receives the thrust load, and accelerates heat transfer from the electric motor to the inverter cooling chamber. It is possible to enhance the cooling efficiency by promoting the heat radiation of. Further, since the refrigerant is guided by the reinforcing ribs, there is an effect that heat exchange is promoted and cooling efficiency can be improved.
【００１１】さらに、補強用リブの一個がインバータ冷
却室を区画し、他の補強用リブにより区画されたインバ
ータ冷却室間を連通させている。これにより、冷媒は区
画の一方の側から他方の側へ案内される。冷媒の流通経
路が定まり効率よくインバータの冷却を行うことができ
る効果がある。 Further , one of the reinforcing ribs defines the inverter cooling chamber, and the other inverter ribs defined by the other reinforcing ribs communicate with each other. This guides the refrigerant from one side of the compartment to the other. There is an effect that the circulation path of the refrigerant is fixed and the inverter can be efficiently cooled.
【００１２】請求項２記載の本発明の車両駆動用電動機
によれば、区画壁となる補強用リブの一側に形成した冷
媒流入孔から流入した冷媒は、ドーナツ形状に沿ってイ
ンバータ冷却室内を一巡して、前記補強用リブの他側に
形成した冷媒流出孔から流出する。従って、インバータ
装着室に装着したインバータを均等に冷却することがで
きる効果がある。According to the vehicle drive electric motor of the present invention described in claim 2, the refrigerant flowing from the refrigerant inlet hole formed at one side of the reinforcing rib as a partition wall, an inverter cooling chamber along a donut After one round, the refrigerant flows out from the refrigerant outlet hole formed on the other side of the reinforcing rib. Therefore, there is an effect that the inverter mounted in the inverter mounting chamber can be cooled evenly.
【００１３】請求項３記載の本発明の車両駆動用電動機
によれば、回転子軸の軸線に沿って電動機と減速機構及
び差動機構とが直列的に配置される。このため、車両の
駆動系がコンパクトに集積され車室領域や積載領域を拡
大できるとともに、保守点検等のメインテナンス作業を
効率的に行うことができる効果がある。According to the vehicle driving electric motor of the third aspect of the present invention, the electric motor, the reduction mechanism and the differential mechanism are arranged in series along the axis of the rotor shaft. For this reason, the drive system of the vehicle is compactly integrated, the vehicle compartment area and the loading area can be expanded, and maintenance work such as maintenance and inspection can be efficiently performed.
【００１４】[0014]
【実施例】本発明の実施例を図面を参照して説明する。
図１は本発明に係る車両駆動用電動機１の中間部を省略
した縦断面図、図２は図１におけるインバータ冷却室の
左右両側部分の概略の分解斜視図、図３は図１における
Ａ−Ａ線断面図である。電動機は、ブラシ等のように回
転体と接触する機構を有しないかご形誘導電動機を用い
るのが好ましい。このため、本実施例は電動機としてか
ご形誘導電動機（以下単に誘導電動機という）を用いた
態様で説明する。円筒状のハウジング２の両側にはそれ
ぞれエンドフレーム３ａ，３ｂが嵌着されている。その
エンドフレーム３の中心に嵌着したベアリング４ａ，４
ｂにより回転子５の管軸状の回転子軸６が支承されてい
る。Embodiments of the present invention will be described with reference to the drawings.
1 is a vertical cross-sectional view of a vehicle driving electric motor 1 according to the present invention with an intermediate portion omitted, FIG. 2 is a schematic exploded perspective view of both left and right side portions of an inverter cooling chamber in FIG. 1, and FIG. It is an A line sectional view. As the electric motor, it is preferable to use a squirrel-cage induction motor that does not have a mechanism for contacting the rotating body such as a brush. Therefore, the present embodiment will be described in a mode in which a squirrel-cage induction motor (hereinafter simply referred to as an induction motor) is used as an electric motor. End frames 3a and 3b are fitted on both sides of the cylindrical housing 2, respectively. Bearings 4a, 4 fitted in the center of the end frame 3
A tubular shaft-shaped rotor shaft 6 of the rotor 5 is supported by b.
【００１５】一方のエンドフレーム３ａには、管軸状の
回転子軸６の中心を貫通する出力軸２９を挿通する挿通
孔７の外周にドーナツ状のインバータ冷却室８が一体形
成されている。該インバータ冷却室８には挿通孔７を形
成する内周壁９から外周壁１０との間の３箇所に軸方向
へ突出する補強用リブ１１ａ，１１ｂ，１１ｃが形成さ
れている。補強用リブ１１ａは、インバータ冷却室８を
冷媒の流入側と流出側に区画する区画壁をなす。他の補
強用リブ１１ｂと１１ｃは、前記内周壁９から外周壁１
０に向かって軸方向の突出長さを一定の割合で減少させ
た三角形状として、冷媒を前記流入側から流出側へ案内
する通路を形成している。そして、そのインバータ冷却
室８の外周壁１０には、前記補強用リブ１１ａを挟む両
側の位置に、冷媒流入孔１２と冷媒流出孔１３とが穿設
され、冷媒流入管１４と冷媒流出管１５とが接続されて
いる。そして、インバータ冷却室８が一体形成されエン
ドフレーム３ａには、中心に前記出力軸２９を挿通する
インバータ装着室１６が固定され、インバータ冷却室８
を液密に封止している。In one end frame 3a, a donut-shaped inverter cooling chamber 8 is integrally formed on the outer periphery of an insertion hole 7 through which an output shaft 29 penetrating the center of the tubular shaft 6 is inserted. The inverter cooling chamber 8 is formed with reinforcing ribs 11a, 11b, 11c projecting in the axial direction at three locations between the inner peripheral wall 9 forming the insertion hole 7 and the outer peripheral wall 10. The reinforcing rib 11a forms a partition wall that partitions the inverter cooling chamber 8 into a refrigerant inflow side and a refrigerant outflow side. The other reinforcing ribs 11b and 11c are provided from the inner peripheral wall 9 to the outer peripheral wall 1.
A passage for guiding the refrigerant from the inflow side to the outflow side is formed in a triangular shape in which the protruding length in the axial direction decreases toward 0. A refrigerant inflow hole 12 and a refrigerant outflow hole 13 are formed in the outer peripheral wall 10 of the inverter cooling chamber 8 at positions on both sides of the reinforcing rib 11a, and a refrigerant inflow pipe 14 and a refrigerant outflow pipe 15 are formed. And are connected. The inverter cooling chamber 8 is integrally formed with the end frame 3a, and the inverter mounting chamber 16 through which the output shaft 29 is inserted is fixed to the end frame 3a.
Is liquid-tightly sealed.
【００１６】インバータ装着室１６には、樹脂ケース内
に半導体素子を封入するとともに、放熱金属板１７を固
定して、インバータ１８を構成してなる複数個の半導体
素子パック１９が配置されている。インバータ１８は直
流電力を交流電力に変換する。前記半導体素子パック１
９の放熱金属板１７は、前記インバータ冷却室８を塞ぐ
インバータ装着室１６の壁１６ａに当接されている。そ
して、その壁１６ａからは前記インバータ冷却室８内に
突出する多数の放熱フィン２０が同心円状に一体形成さ
れている。同心円状の放熱フィン２０には、円周方向で
数箇所不連続部２０ａが形成され、前記補強用リブ１１
ａ，１１ｂ，１１ｃを対応させて、放熱フィン２０と補
強用リブ１１ａ〜１１ｃとが干渉しないようになってい
る。In the inverter mounting chamber 16, there are arranged a plurality of semiconductor element packs 19 which form an inverter 18 by enclosing a semiconductor element in a resin case and fixing a heat radiating metal plate 17. The inverter 18 converts DC power into AC power. The semiconductor device pack 1
The heat dissipation metal plate 17 of 9 is in contact with the wall 16 a of the inverter mounting chamber 16 that closes the inverter cooling chamber 8. A large number of radiating fins 20 projecting into the inverter cooling chamber 8 from the wall 16a are integrally formed concentrically. The concentric heat dissipation fin 20 is formed with several discontinuous portions 20a in the circumferential direction, and the reinforcing rib 11 is provided.
The heat radiation fin 20 and the reinforcing ribs 11a to 11c are prevented from interfering with each other by making the a, 11b, and 11c correspond to each other.
【００１７】円筒状のハウジング２の内周壁２ａには、
前記回転子５に対向して固定子２１が配設され、誘導電
動機２２が構成されている。また、他方のエンドフレー
ム３ｂの外側には、ギヤボックス２３が固定されてい
る。該ギヤボックス２３内には、遊星歯車式減速機構２
４と同軸型差動歯車機構３０が回転子軸６に沿って直列
状に配設されている。遊星歯車式減速機構２４は、前記
エンドフレーム３ｂに嵌着したベアリング４ｂに支承さ
れて、ギヤボックス２３内に突出した管軸状の回転子軸
６の突出端に固着した太陽歯車２５と、該太陽歯車２５
とギヤボックス２３に固定した大径の内歯歯車２６とに
噛み合う複数個の遊星歯車２７と、該遊星歯車２７を回
転自在に支持したキャリヤ２８とから構成されている。
前記管軸状の回転子軸６の中心には、出力軸２９が貫通
して両端を該回転子軸６から突出している。On the inner peripheral wall 2a of the cylindrical housing 2,
A stator 21 is arranged so as to face the rotor 5, and an induction motor 22 is configured. A gear box 23 is fixed to the outside of the other end frame 3b. In the gear box 23, the planetary gear type reduction mechanism 2
4 and the coaxial type differential gear mechanism 30 are arranged in series along the rotor shaft 6. The planetary gear type reduction mechanism 24 is supported by a bearing 4b fitted in the end frame 3b, and a sun gear 25 fixed to a protruding end of a tubular shaft-shaped rotor shaft 6 protruding into the gear box 23, Sun gear 25
And a plurality of planetary gears 27 that mesh with a large-diameter internal gear 26 fixed to the gear box 23, and a carrier 28 that rotatably supports the planetary gears 27.
An output shaft 29 penetrates through the center of the rotor shaft 6 having a tubular shape, and both ends of the output shaft 29 project from the rotor shaft 6.
【００１８】同軸型差動歯車機構３０は、前記出力軸２
９の突出端に固着した太陽歯車３１と、ギヤボックス２
３のベアリング３２に回転自在に支承された大径の内歯
歯車３３と、前記遊星歯車式減速機構２４のキャリヤ２
８に回転自在に支持され、太陽歯車３１と内歯歯車３３
とに噛み合う複数個の遊星歯車３４とから構成されてい
る。内歯歯車３３は、ギヤボックス２３の外部に突出す
る軸部が等速ボールジョイント３５の動力伝達軸３６と
なっている。また、エンドフレーム３ａのベアリング４
ａに支承された回転子軸６から突出して、前記インバー
タ冷却室８及びインバータ装着室１６の中心を貫通する
出力軸２９は、前記インバータ装着室１６のエンドカバ
ー１６ｂに嵌着したベアリング３６に支承された等速ボ
ールジョイント３８の動力伝達軸３９に締着されてい
る。The coaxial type differential gear mechanism 30 includes the output shaft 2
9 and the sun gear 31 fixed to the protruding end of the gear box 2
A large-diameter internal gear 33 rotatably supported by a bearing 32 of No. 3 and a carrier 2 of the planetary gear type reduction mechanism 24.
8 is rotatably supported and has a sun gear 31 and an internal gear 33.
And a plurality of planetary gears 34 that mesh with. In the internal gear 33, the shaft portion protruding outside the gear box 23 serves as a power transmission shaft 36 of the constant velocity ball joint 35. Also, the bearing 4 of the end frame 3a
The output shaft 29 protruding from the rotor shaft 6 supported by a and penetrating the centers of the inverter cooling chamber 8 and the inverter mounting chamber 16 is supported by the bearing 36 fitted in the end cover 16b of the inverter mounting chamber 16. It is fastened to the power transmission shaft 39 of the constant velocity ball joint 38.
【００１９】上記車両駆動用電動機１の作動を説明す
る。インバータ１８により直流電力を交流電力に変換し
て、誘導電動機２２の固定子２１に印加すると、回転子
５が回転する。そして、図４に示される冷媒圧送用の電
動ポンプ４０が駆動すると、冷媒は冷媒流入管１４→冷
媒流入孔１２→インバータ冷却室８→冷媒流出孔１３→
冷媒流出管１５→電動ポンプ４０と連なる冷媒循環経路
を循環する。冷媒流入孔１２と冷媒流出孔１３との間に
は、補強用リブ１１ａが形成されて区画壁となってい
る。他の補強用リブ１１ｂ，１１ｃは、内周壁９から外
周壁１０に向かって軸方向の突出長さを一定の割合で減
少させた三角形状となっていて、冷媒を前記流入側から
流出側へ案内する通路を形成している、従って、流入し
た冷媒はドーナツ形状に沿って流れ、インバータ冷却室
８内を一巡した後前記冷媒流出孔１３から流出する。The operation of the vehicle driving electric motor 1 will be described. When DC power is converted into AC power by the inverter 18 and applied to the stator 21 of the induction motor 22, the rotor 5 rotates. Then, when the electric pump 40 for pumping the refrigerant shown in FIG. 4 is driven, the refrigerant flows into the refrigerant inflow pipe 14 → the refrigerant inflow hole 12 → the inverter cooling chamber 8 → the refrigerant outflow hole 13 →
The refrigerant outflow pipe 15 circulates in a refrigerant circulation path connected to the electric pump 40. A reinforcing rib 11a is formed between the refrigerant inflow hole 12 and the refrigerant outflow hole 13 to form a partition wall. The other reinforcing ribs 11b and 11c have a triangular shape in which the protruding length in the axial direction from the inner peripheral wall 9 to the outer peripheral wall 10 is reduced at a constant rate, and the refrigerant flows from the inflow side to the outflow side. Therefore, the refrigerant that has formed the passage for guiding flows in a donut shape, makes a circuit in the inverter cooling chamber 8, and then flows out from the refrigerant outlet hole 13.
【００２０】インバータ冷却室８内を一巡する冷媒は、
放熱金属板１７から放熱フィン２０に伝わるインバータ
１８の発熱を吸収して冷却する。従って、インバータ１
８を構成する半導体素子の昇温により特性の変化や熱破
壊を防止できる。また、エンドフレーム３ａに伝わる誘
導電動機２２の発熱をも吸収して冷却する。エンドフレ
ーム３ａは補強用リブ１１ａ〜１１ｃを形成しているか
ら、構造的に肉厚を薄くでき、誘導電動機２２からイン
バータ冷却室８への熱伝達を速めて、放熱を促進して冷
却効率を高めることができる。The refrigerant circulating in the inverter cooling chamber 8 is
The heat of the inverter 18 transmitted from the heat radiating metal plate 17 to the heat radiating fin 20 is absorbed and cooled. Therefore, the inverter 1
It is possible to prevent changes in characteristics and thermal destruction due to the temperature rise of the semiconductor element forming the structure 8. Further, the heat generation of the induction motor 22 transmitted to the end frame 3a is also absorbed and cooled. Since the end frame 3a is formed with the reinforcing ribs 11a to 11c, the wall thickness can be structurally reduced, the heat transfer from the induction motor 22 to the inverter cooling chamber 8 is accelerated, heat dissipation is promoted, and cooling efficiency is improved. Can be increased.
【００２１】図４は、上記構成の車両駆動用電動機１を
搭載した電気自動車の概略平面図である。誘導電動機２
２、遊星歯車式減速機構２４及び同軸型差動歯車機構３
０を直列状に一体に組み込み、冷媒圧送用の電動ポンプ
４０を付設して冷媒を循環させるとともに、走行に伴う
強い風を当てるようにして、循環する冷媒や誘導電動機
２２を冷却するもので、コンパクトな外観形状に纏めて
小型軽量化できるとともに、搭載に必要な容積も少なく
てすみ、電気自動車の車室や積載区画を拡大できる。さ
らに、車両の駆動系が一か所に集積されたから、保守点
検作業を効率的に行うことができる利点がある。FIG. 4 is a schematic plan view of an electric vehicle equipped with the vehicle driving electric motor 1 having the above structure. Induction motor 2
2, planetary gear type reduction gear mechanism 24 and coaxial type differential gear mechanism 3
0 is integrally incorporated in series, and an electric pump 40 for pumping the refrigerant is attached to circulate the refrigerant, and a strong wind is applied during traveling to cool the circulating refrigerant and the induction motor 22, In addition to being compact and lightweight, it can be made compact and lightweight, and the volume required for mounting is also small, so the passenger compartment and loading compartment of an electric vehicle can be expanded. Further, since the drive system of the vehicle is integrated in one place, there is an advantage that maintenance and inspection work can be efficiently performed.
【図１】本発明に係る車両駆動用電動機の中間部分を省
略した縦断断面図である。FIG. 1 is a vertical cross-sectional view in which an intermediate portion of a vehicle driving electric motor according to the present invention is omitted.
【図２】インバータ冷却室の左右両側部分の概略の分解
斜視図である。FIG. 2 is a schematic exploded perspective view of left and right side portions of an inverter cooling chamber.
【図３】図１におけるＡ−Ａ線断面図である。3 is a cross-sectional view taken along the line AA in FIG.
【図４】車両駆動用電動機を搭載した電気自動車の概略
平面図である。FIG. 4 is a schematic plan view of an electric vehicle equipped with a vehicle driving electric motor.
【図５】従来例の電気自動車の概略平面図である。FIG. 5 is a schematic plan view of a conventional electric vehicle.
１ 車両駆動用電動機 ３ａ エンドフレーム ５ 回転子 ６ 回転子軸 ８ インバータ冷却室 １１ａ〜１１ｃ 補強用リブ １２ 冷媒流入孔 １３ 冷媒流出孔 １８ インバータ ２２ 誘導電動機 ２４ 遊星歯車式減速機構 ３０ 同軸型差動歯車機構 ４０ 電動ポンプ 1 Vehicle drive motor 3a end frame 5 rotor 6 rotor shaft 8 Inverter cooling room 11a to 11c Reinforcing ribs 12 Refrigerant inflow hole 13 Refrigerant outflow hole 18 Inverter 22 induction motor 24 Planetary gear type reduction mechanism 30 Coaxial type differential gear mechanism 40 electric pump
Claims (3)
タと、該インバータから供給される交流電力により回転
する電動機を一体に組み込むとともに、前記電動機の回
転子軸を支承するエンドフレームに冷却手段の冷媒を循
環させて前記インバータを冷却するインバータ冷却室を
一体形成した車両駆動用電動機であって、 前記エンドフレームに一体形成した補強用リブを前記イ
ンバータ冷却室に突出させるとともに、該補強用リブに
より循環する前記冷媒を案内するようになっており、 前記補強用リブは、前記エンドフレームの半径方向に複
数個放射状に形成するとともに、何れか一個の補強用リ
ブを前記インバータ冷却室を区画する区画壁とし、他の
補強用リブは前記インバータ冷却室への突出長さを前記
半径方向で変化させた ことを特徴とする車両駆動用電動
機。1. An inverter for converting DC power into AC power and an electric motor that is rotated by the AC power supplied from the inverter are integrally incorporated, and a refrigerant of cooling means is mounted on an end frame that supports a rotor shaft of the electric motor. A vehicle driving electric motor integrally formed with an inverter cooling chamber that circulates air to cool the inverter, the reinforcing rib integrally formed on the end frame.
And the ribs for reinforcement
It guides the more circulating refrigerant, and the reinforcing ribs are duplicated in the radial direction of the end frame.
Form a few radial pieces and use one of the reinforcing ribs.
Is a partition wall that partitions the inverter cooling chamber, and
The reinforcing rib has the above-mentioned projection length to the inverter cooling chamber.
A vehicle drive electric motor characterized by being changed in the radial direction .
レームに支承される前記回転子軸が挿通されるドーナツ
形状とするとともに、冷媒流入孔と冷媒流出孔とを前記
インバータ冷却室の区画壁となる補強用リブの両側に形
成したことを特徴とする請求項１記載の車両駆動用電動
機。2. The inverter cooling chamber has a donut shape through which the rotor shaft supported by the end frame is inserted, and the refrigerant inflow hole and the refrigerant outflow hole serve as partition walls of the inverter cooling chamber. vehicle drive motor according to claim 1, characterized in that formed on both sides of the reinforcing ribs.
を、前記回転子軸の軸線に沿って直列的に配置して一体
化したことを特徴とする請求項１記載の車両駆動用電動
機。3. The electric motor for driving a vehicle according to claim 1, wherein the electric motor, the speed reducing mechanism and the differential mechanism are arranged in series along an axis of the rotor shaft and integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11457794A JP3508206B2 (en) | 1994-04-27 | 1994-04-27 | Motor for driving vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11457794A JP3508206B2 (en) | 1994-04-27 | 1994-04-27 | Motor for driving vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07298552A JPH07298552A (en) | 1995-11-10 |
| JP3508206B2 true JP3508206B2 (en) | 2004-03-22 |
Family
ID=14641327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11457794A Expired - Fee Related JP3508206B2 (en) | 1994-04-27 | 1994-04-27 | Motor for driving vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3508206B2 (en) |
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| DE102021213004A1 (en) | 2021-11-18 | 2023-05-25 | Volkswagen Aktiengesellschaft | Drive train for a motor vehicle |
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| DE102015209396B3 (en) * | 2015-05-22 | 2016-11-03 | Continental Automotive Gmbh | Drive arrangement for driving a vehicle |
| DE102015216055B4 (en) * | 2015-08-21 | 2019-07-18 | Continental Automotive Gmbh | Cooling system for an electric machine |
| JP2017192285A (en) * | 2016-04-11 | 2017-10-19 | 三菱電機株式会社 | Rotary machine and vehicle including the same |
| DE102017215835A1 (en) * | 2017-09-07 | 2019-03-07 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Fluid cooled electric machine |
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| JP7456189B2 (en) * | 2020-02-28 | 2024-03-27 | ニデック株式会社 | drive device |
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1994
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Cited By (2)
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|---|---|---|---|---|
| DE102019215531A1 (en) * | 2019-10-10 | 2021-04-15 | Robert Bosch Gmbh | Electric machine with a cooling function |
| DE102021213004A1 (en) | 2021-11-18 | 2023-05-25 | Volkswagen Aktiengesellschaft | Drive train for a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07298552A (en) | 1995-11-10 |
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