JP2020039230A - Cooling structure of rotor including field winding - Google Patents

Cooling structure of rotor including field winding Download PDF

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JP2020039230A
JP2020039230A JP2018166069A JP2018166069A JP2020039230A JP 2020039230 A JP2020039230 A JP 2020039230A JP 2018166069 A JP2018166069 A JP 2018166069A JP 2018166069 A JP2018166069 A JP 2018166069A JP 2020039230 A JP2020039230 A JP 2020039230A
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oil passage
back yoke
steel plates
shaft
steel plate
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洸太 塩谷
Kota Shiotani
洸太 塩谷
優哉 藤原
Yuya Fujiwara
優哉 藤原
茂夫 桜井
Shigeo Sakurai
茂夫 桜井
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Priority to JP2018166069A priority Critical patent/JP2020039230A/en
Priority to PCT/JP2019/024419 priority patent/WO2020049830A1/en
Publication of JP2020039230A publication Critical patent/JP2020039230A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

To provide cooling structure of a rotor including a field winding capable of certainly cooling a center part of the winding while maintaining productivity and strength.SOLUTION: Cooling structure of a rotor is constituted by providing bores 22cto 22cand 22cto 22cfor an oil passage formed so that a part or the whole overlaps with the ones formed on steel plates adjacent in an axial direction, respectively in a radial direction and a circumferential direction at positions facing a slot 22d of a back yoke 22a of the steel plates 22Ato 22A, 22Bto 22B, and is constituted so that the bores 22cand 22cfor the oil passage of the steel plates 22Aand 22Bopen inside the radial direction of the back yoke 22a, bores 22cand 22cfor the oil passage formed in the back yoke 22a of the steel plates 22Aand 22Bopen outside the radial direction of the back yoke 22a, and an opening on an outer peripheral surface side of a shaft side oil passage 21b is arranged at a position facing the bores 22cand 22cfor the oil passage of the steel plates 22Aand 22B.SELECTED DRAWING: Figure 3

Description

本発明は、回転子に界磁巻線を含む巻線界磁型同期機の回転子の冷却構造に関する。   The present invention relates to a cooling structure of a rotor of a winding field type synchronous machine including a field winding in the rotor.

従来、永久磁石型同期機（ＰＭＳＭ：permanent magnet synchronous machine）に対して、高速・低負荷域での効率向上、高速での出力向上のために、動作領域に応じて界磁量を変えることのできる回転子に界磁巻線を含む巻線界磁型同期機（ＷＦＳＭ：wound field synchronous machine）が用いられることが知られている。   Conventionally, for a permanent magnet synchronous machine (PMSM), to improve the efficiency in high-speed and low-load areas and to increase the output at high speed, the field amount is changed according to the operation area. It is known that a wound field synchronous machine (WFSM) including a field winding is used for a possible rotor.

巻線界磁型同期機は、長時間の連続運転で使用する場合、巻線の温度上昇を抑制するために回転している間冷却することが必要となる。一般的には、ロータの外側から空気や冷却油により冷却が行われている。   When the winding field type synchronous machine is used in a continuous operation for a long time, it is necessary to cool the winding field while rotating to suppress the temperature rise of the winding. Generally, cooling is performed by air or cooling oil from outside the rotor.

特開２０１４−１７６２３５号公報JP 2014-176235 A 特開２０１１−２５４５７１号公報JP 2011-254571 A

しかしながら、巻線界磁型同期機においてはロータの外側から空気や冷却油を供給するだけでは、巻線の中央部まで空気や冷却油が十分に行き渡らず、巻線を十分に冷却することができないという問題があった。   However, in a winding field type synchronous machine, simply supplying air or cooling oil from the outside of the rotor does not allow the air or cooling oil to reach the center of the winding sufficiently, and it is possible to sufficiently cool the winding. There was a problem that it was not possible.

また、一部の鋼板に油路を形成してシャフト側から冷却油を供給しようとすると、この鋼板が分割コアとなり、生産性や強度が悪化するという問題もあった。   Further, when an oil passage is formed in some steel plates to supply cooling oil from the shaft side, the steel plates become split cores, and there is a problem that productivity and strength deteriorate.

このようなことから本発明は、生産性および強度を維持しつつ巻線の中央部を確実に冷却可能な界磁巻線を含む回転子の冷却構造を提供することを目的とする。   In view of the above, an object of the present invention is to provide a cooling structure of a rotor including a field winding capable of surely cooling a central portion of the winding while maintaining productivity and strength.

上記の課題を解決するための第１の発明に係る界磁巻線を含む回転子の冷却構造は、
中空部を有するシャフトと、
軸方向に複数の鋼板を積層して形成され前記シャフトに固定されるロータコアと、
前記ロータコアに巻回された界磁巻線と、
を含み、
前記シャフトは前記中空部と当該シャフトの外周面との間で貫通するシャフト側油路を周方向に複数備え、
前記鋼板は、バックヨークのスロットに対向する位置に、それぞれ当該バックヨークの径方向の幅より小さい一または複数の油路用孔を備え、
前記油路用孔は軸方向に隣接する前記鋼板に形成された油路用孔に対して径方向及び周方向に一部または全部が重なるように形成され、
少なくともひとつの前記鋼板の前記バックヨークに形成された前記油路用孔は前記バックヨークの径方向内側に開口し、
少なくとも他のひとつの前記鋼板の前記バックヨークに形成された前記油路用孔は前記バックヨークの径方向外側に開口し、
前記シャフト側油路の前記外周面側の開口部は前記バックヨークの径方向内側に開口した前記油路用孔に対向する位置に配設されている
ことを特徴とする。 A cooling structure of a rotor including a field winding according to a first invention for solving the above-described problems,
A shaft having a hollow portion,
A rotor core formed by laminating a plurality of steel plates in the axial direction and fixed to the shaft,
A field winding wound around the rotor core,
Including
The shaft includes a plurality of shaft-side oil passages penetrating between the hollow portion and the outer peripheral surface of the shaft in a circumferential direction,
The steel plate includes one or a plurality of oil passage holes smaller than the radial width of the back yoke at positions facing the slots of the back yoke, respectively.
The oil passage hole is formed so as to partially or entirely overlap in the radial direction and the circumferential direction with respect to the oil passage hole formed in the steel plate adjacent in the axial direction,
The oil passage hole formed in the back yoke of at least one of the steel plates opens radially inward of the back yoke,
The oil passage hole formed in the back yoke of at least one other steel plate is opened radially outward of the back yoke,
The opening on the outer peripheral surface side of the shaft-side oil passage is provided at a position facing the oil passage hole opened radially inward of the back yoke.

また、上記の課題を解決するための第２の発明に係る界磁巻線を含む回転子の冷却構造は、第１の発明において、
軸方向両側に位置する前記鋼板が、それぞれ前記バックヨークの径方向内側に開口する前記油路用孔を有し、
軸方向中央部に位置する少なくとも二つの前記鋼板が、前記バックヨークの径方向外側に開口する前記油路用孔を有し、
前記ロータコアが、軸方向中央部に位置する二つの前記鋼板の間に介在し、前記油路用穴を備えない鋼板を有している
ことを特徴とする。 In addition, a cooling structure of a rotor including a field winding according to a second invention for solving the above-mentioned problems, according to the first invention,
The steel plates located on both sides in the axial direction each have the oil passage hole that opens radially inward of the back yoke,
At least two steel plates located at the axial center portion have the oil passage holes that open radially outward of the back yoke,
The rotor core may include a steel plate that is interposed between the two steel plates located at the center in the axial direction and does not include the oil passage hole.

本発明に係る界磁巻線を含む回転子の冷却構造によれば、生産性および強度を維持しつつ、巻線の径方向中央側を確実に冷却することができる。   ADVANTAGE OF THE INVENTION According to the cooling structure of the rotor containing the field winding which concerns on this invention, the radial center side of a winding can be cooled reliably, maintaining productivity and intensity | strength.

本発明の実施例に係る突極形回転電機の断面図である。It is sectional drawing of the salient pole type rotary electric machine which concerns on the Example of this invention. 図１の部分拡大図である。It is the elements on larger scale of FIG. 本発明の実施例に係る突極形回転電機の回転子の軸方向に沿った断面図である。FIG. 2 is a cross-sectional view along the axial direction of a rotor of the salient pole type rotating electric machine according to the embodiment of the present invention. 図１に示すシャフトおよびロータコアの拡大図である。FIG. 2 is an enlarged view of a shaft and a rotor core shown in FIG. 1. 図３に示す各鋼板の正面図である。It is a front view of each steel plate shown in FIG.

以下、図面を参照しつつ本発明に係る界磁巻線を含む回転子の冷却構造について説明する。   Hereinafter, a cooling structure of a rotor including a field winding according to the present invention will be described with reference to the drawings.

図１から図５を用いて本発明の一実施例に係る界磁巻線を含む回転子の冷却構造の詳細を説明する。   1 to 5, a cooling structure of a rotor including a field winding according to an embodiment of the present invention will be described in detail.

図１に示すように、本実施例に係る巻線界磁型同期機１は、図示しないフレーム等に固定された略円筒状のステータ１０と、ステータ１０の内周側に回転自在に保持されたロータ２０とを有している。   As shown in FIG. 1, a winding field type synchronous machine 1 according to the present embodiment is rotatably held on a substantially cylindrical stator 10 fixed to a frame or the like (not shown) and an inner peripheral side of the stator 10. Rotor 20.

ステータ１０は、ステータコア１１と、このステータコア１１に巻回された巻線（固定子巻線）１２とを備えている。巻線１２は、ステータコア１１の径方向内側に設けられた複数（本実施例では３６個）のティース１１ａに巻回されている。   The stator 10 includes a stator core 11 and a winding (stator winding) 12 wound around the stator core 11. The winding 12 is wound around a plurality (36 in this embodiment) of teeth 11 a provided radially inside the stator core 11.

ロータ２０は、シャフト２１と、シャフト２１に固定されたロータコア２２と、ロータコア２２に巻回された巻線（回転子界磁巻線）２３とを備えている。   The rotor 20 includes a shaft 21, a rotor core 22 fixed to the shaft 21, and a winding (rotor field winding) 23 wound around the rotor core 22.

シャフト２１は、中空部２１ａを有すると共に、中空部２１ａからシャフト２１の外周面に向かって延びるシャフト側油路２１ｂを有している。   The shaft 21 has a hollow portion 21a and a shaft-side oil passage 21b extending from the hollow portion 21a toward the outer peripheral surface of the shaft 21.

ロータコア２２は、円筒状のバックヨーク２２ａと、バックヨーク２２ａの外周面から径方向外側に向かって放射状に延びる複数（本実施例では６個）のティース２２ｂとを備えている。バックヨーク２２ａにはその内周面と外周面とを連通するコア側油路２２ｃが形成されている。
巻線２３は、図２に示すようにコイル素線２３ａをティース２２ｂに巻回することにより形成されている。なお、図２に示す２４はボビンである。 The rotor core 22 includes a cylindrical back yoke 22a and a plurality (six in this embodiment) of teeth 22b radially extending radially outward from the outer peripheral surface of the back yoke 22a. The back yoke 22a is provided with a core-side oil passage 22c that communicates the inner peripheral surface and the outer peripheral surface.
The winding 23 is formed by winding a coil wire 23a around a tooth 22b as shown in FIG. In addition, 24 shown in FIG. 2 is a bobbin.

図３および図４に示すように、シャフト２１の中空部２１ａは、軸方向一端側に開口している。また、シャフト側油路２１ｂは、軸方向において後述する鋼板２２Ａ1，２２Ｂ1に対向する位置にそれぞれ形成されている（以下、鋼板２２Ａ1に対向する位置に形成されたシャフト側油路を２１ｂ1，鋼板２２Ｂ1に対向する位置に形成されたシャフト側油路を２１ｂ2と称する）。シャフト側油路２１ｂ1，２１ｂ2は中空部２１ａと後述する油路用孔２２ｃA1，２２ｃB1との間を連通するよう概ね径方向に沿って周方向に複数（本実施例では１２箇所）形成されている。 As shown in FIGS. 3 and 4, the hollow portion 21a of the shaft 21 is open at one axial end. Further, the shaft-side oil passage 21b is formed at a position facing the steel plates 22A 1 and 22B 1 described later in the axial direction (hereinafter, the shaft-side oil passage formed at a position facing the steel plate 22A 1 is referred to as 21b). 1, referred to the shaft-side oil passage formed in a position opposed to the steel plate 22B 1 and 21b 2). A plurality of shaft-side oil passages 21b 1 and 21b 2 are provided in the circumferential direction along the radial direction so as to communicate between the hollow portion 21a and oil passage holes 22c A1 and 22c B1 (twelve in this embodiment). Is formed.

また、図３から図５に示すように、ロータコア２２は、複数の薄板状の鋼板２２Ａ1〜２２Ａ6，２２Ｂ6〜２２Ｂ1を軸方向に積層し、その軸方向両端に鋼板２２Ａ1〜２２Ａ6，２２Ｂ6〜２２Ｂ1よりも軸方向の幅が大きい鋼板２２Ｃ1，２２Ｄ1をそれぞれ配するとともに、鋼板２２Ａ6と鋼板２２Ｂ6との間に鋼板２２Ａ1〜２２Ａ6，２２Ｂ6〜２２Ｂ1よりも軸方向の幅が大きい鋼板２２Ｃ2，２２Ｄ2を配して構成されている。 Further, as shown in FIGS. 3 to 5, the rotor core 22, a plurality of laminated thin plate of steel 22A 1 ~22A 6, 22B 6 ~22B 1 in the axial direction, the steel plate 22A 1 ~22A its axial ends 6, 22B 6 ~22B while distributing each axial direction of the steel sheet 22C 1 width is large, 22D 1 a than 1, the steel plate 22A 1 ~22A 6, 22B 6 ~22B 1 between the steel sheet 22A 6 and the steel plate 22B 6 The steel plates 22C 2 and 22D 2 having a greater width in the axial direction are arranged.

コア側油路２２ｃは、鋼板２２Ａ1〜２２Ａ6にそれぞれ異なる位置に形成された孔部と、鋼板２２Ｂ1〜２２Ｂ6にそれぞれ異なる位置に形成された孔部とによって構成されている（以下、各鋼板２２Ａ1〜２２Ａ6に形成された孔部をそれぞれ油路用孔２２ｃA1〜２２ｃA6、各鋼板２２Ｂ1〜２２Ｂ6に形成された孔部をそれぞれ油路用孔２２ｃB1〜２２ｃB6と称する）。 Core-side oil passage 22c is composed of a hole portion formed at different positions in the steel sheet 22A 1 ~22A 6, by a hole formed in different positions in the steel plate 22B 1 ~22B 6 (hereinafter, each steel plate 22A 1 ~22A 6 the formed holes, respectively oil passage holes 22c A1 ~22c A6, and the steel plate 22B 1 ~22B 6 the formed holes, respectively oil passage holes 22c B1 ~22c B6 Name).

油路用孔２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6は、それぞれバックヨーク２２ａの、周方向に隣り合うティース２２ｂ間（スロット２２ｄ）に対向する位置に、周方向に離間して各２箇所ずつ、合計１２箇所形成されている。油路用孔２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6は、それぞれバックヨーク２２ａの径方向の幅より小さく形成されている。 The oil passage holes 22c A1 to 22c A6 , 22c B1 to 22c B6 are respectively provided at two positions on the back yoke 22a facing the circumferentially adjacent teeth 22b (slots 22d) and spaced apart in the circumferential direction. Each is formed in a total of 12 places. Oil passage hole 22c A1 ~22c A6, 22c B1 ~22c B6 is smaller than the radial width of the back yoke 22a, respectively.

この油路用孔２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6は、各鋼板２２Ａ1〜２２Ａ6，２２Ｂ1〜２２Ｂ6の軸方向に隣接するもの同士で、周方向に同一の位置であって径方向に一部が重なるように形成されている。 The oil passage hole 22c A1 ~22c A6, 22c B1 ~22c B6 is a adjacent ones in the axial direction of each steel plate 22A 1 ~22A 6, 22B 1 ~22B 6, in the circumferential direction have the same position It is formed so as to partially overlap in the radial direction.

本実施例では、鋼板２２Ａ1と鋼板２２Ｂ1、鋼板２２Ａ2と鋼板２２Ｂ2、鋼板２２Ａ3と鋼板２２Ｂ3、鋼板２２Ａ4と鋼板２２Ｂ4、鋼板２２Ａ5と鋼板２２Ｂ5、鋼板２２Ａ6と鋼板２２Ｂ6はそれぞれ同一の位置に孔部を有している。 In this embodiment, the steel plate 22A 1 and the steel plate 22B 1, the steel plate 22A 2 and the steel plate 22B 2, the steel plate 22A 3 and the steel plate 22B 3, the steel plate 22A 4 and the steel plate 22B 4, the steel plate 22A 5 and the steel plate 22B 5, and the steel plate 22A 6 steel 22B 6 have holes at the same position.

さらに、最も軸方向外側に配設されている鋼板２２Ａ1，２２Ｂ1に形成された油路用孔２２ｃA1，２２ｃB1は径方向内側に開口しており、最も軸方向内側（鋼板２２Ｃ2，２２Ｄ2に隣接する位置）に配設されている鋼板２２Ａ6，２２Ｂ6に形成された油路用孔２２ｃA6，２２ｃB6はバックヨーク２２ａの径方向外側に開口している。 Further, the oil passage holes 22c A1 and 22c B1 formed in the steel plates 22A 1 and 22B 1 disposed on the outermost side in the axial direction are opened radially inward, and the innermost in the axial direction (the steel plates 22C 2 and 22C 2) . 22D steel sheet 22A 6 disposed on the position) adjacent to the 2, 22B 6 in the formed oil passage hole 22c A6, 22c B6 is open radially outward of the back yoke 22a.

これにより、コア側油路２２ｃはシャフト２１に当接する面から巻線２３に対向する面までの間で連通した状態となり、シャフト２１の中空部２１ａからロータコア２２を通じて巻線２３まで冷却油用の油路が形成されたこととなる。なお、鋼板２２Ｃ1，２２Ｃ2，２２Ｄ1，２２Ｄ2にはコア側油路は設けられていないものとする。 As a result, the core-side oil passage 22c is in a state of communication between the surface contacting the shaft 21 and the surface facing the winding 23, and the cooling oil from the hollow portion 21a of the shaft 21 to the winding 23 through the rotor core 22 is formed. This means that an oil passage has been formed. It is assumed that the steel plates 22C 1 , 22C 2 , 22D 1 , and 22D 2 are not provided with a core-side oil passage.

したがって、ロータ２０の回転時には、冷却油がシャフト２１の中空部２１ａ内からシャフト側油路２１ｂ1，２１ｂ2を介してそれぞれ油路用孔２２ｃA1〜２２ｃA6、油路用孔２２ｃB1〜２２ｃB6を通り巻線２３へ向けて噴射され、ロータコア２２および巻線２３が冷却される。 Therefore, when the rotation of the rotor 20, the hollow portion shaft-side oil passage 21b 1 from the 21a, respectively, via 21b 2 oil passage hole 22c A1 ~22c A6 of cooling oil shaft 21, the oil passage hole 22c B1 ~22c The fuel is injected toward the winding 23 through B6 , and the rotor core 22 and the winding 23 are cooled.

このように構成される本実施例に係る界磁巻線を含む回転子の冷却構造によれば、鋼板２２Ａ1〜２２Ａ6，２２Ｂ1〜２２Ｂ6を分割することなく一体で形成することができ、鋼板を分割する場合に比較して精度および組立性が向上する。且つ、シャフト２１の中空部２１ａを介して供給される冷却油をロータコア２２の内部を通してロータコア２２の回転時にティース２２ｂの根元部分から巻線２３に向けて噴射させることができ、巻線２３の内周面の中央部分に直接冷却油を噴射することができるので、巻線２３の中央部分を十分に冷却することが可能となり、冷却性能が向上する。 According to the cooling structure of a rotor including a field winding of the present embodiment configured as described above, can be formed integrally without dividing the steel plate 22A 1 ~22A 6, 22B 1 ~22B 6 Therefore, accuracy and assemblability are improved as compared with the case where a steel sheet is divided. In addition, the cooling oil supplied through the hollow portion 21a of the shaft 21 can be injected from the root portion of the teeth 22b toward the winding 23 when the rotor core 22 rotates, through the inside of the rotor core 22. Since the cooling oil can be directly injected into the central portion of the peripheral surface, the central portion of the winding 23 can be sufficiently cooled, and the cooling performance is improved.

また、油路用孔２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6の位置を鋼板２２Ａ1〜２２Ａ6，２２Ｂ1〜２２Ｂ6ごとに異なる位置としたことにより、冷却油の噴射口を任意の位置に設定することが可能となり、利便性が向上する。 Also, by the different positions positions of the oil passage hole 22c A1 ~22c A6, 22c B1 ~22c B6 each steel plate 22A 1 ~22A 6, 22B 1 ~22B 6, any position the injection port of the cooling oil Can be set, and the convenience is improved.

なお、上述した実施例では、ロータ２０がコア側油路を有する１２枚の鋼板２２Ａ1〜２２Ａ6，２２Ｂ1〜２２Ｂ6を有する例を示したが、鋼板の数は上述した実施例に限定されるものではない。 In the embodiments described above, the rotor 20 is an example with a 12 steel plates 22A 1 ~22A 6, 22B 1 ~22B 6 having a core-side oil passage, the number of steel sheets limited to the above embodiments It is not something to be done.

また、上述した実施例では、各鋼板２２Ａ1〜２２Ａ6，２２Ｂ1〜２２Ｂ6に形成される油路用孔２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6が、軸方向に隣接するもの同士で、周方向に同一の位置であって径方向で一部が重なるように形成される例を示したが、コア側油路は軸方向に隣接する複数枚の鋼板ごとに同一の位置としても構わない。 Further, in the above embodiment, the steel plate 22A 1 ~22A 6, 22B 1 oil passage hole 22c is formed in ~22B 6 A1 ~22c A6, 22c B1 ~22c B6 is in adjacent ones axially Although an example is shown in which the same position in the circumferential direction is formed so as to partially overlap in the radial direction, the core-side oil passage may be the same position for each of a plurality of steel plates adjacent in the axial direction. Absent.

また、上述した実施例では、少なくとも最も軸方向外側に配設されている鋼板２２Ａ1，２２Ｂ1に形成された油路用孔２２ｃA1，２２ｃB1が径方向内側に開口し、最も軸方向内側（鋼板２２Ｃ2，２２Ｄ2に隣接する位置）に配設されている鋼板２２Ａ6，２２Ｂ6に形成された油路用孔２２ｃA6，２２ｃB6がバックヨーク２２ａの径方向外側に開口している例を示したが、本発明は上述した実施例に限定されるものではなく、コア側油路２２ｃの開口部の位置は必要に応じて変更することができる。 Further, in the above-described embodiment, at least the oil passage holes 22c A1 and 22c B1 formed in the steel plates 22A 1 and 22B 1 disposed at the most outer side in the axial direction are opened radially inward, and the innermost in the axial direction. steel sheet 22A disposed on the (steel plate 22C 2, 22D 2 to position adjacent) 6, 22B 6 in the formed oil passage hole 22c A6, 22c B6 is open radially outward of the back yoke 22a Although an example is shown, the present invention is not limited to the above-described embodiment, and the position of the opening of the core-side oil passage 22c can be changed as necessary.

また、上述した実施例ではコア側油路２２ｃを軸方向中央に対して対称な位置に配置する例を示したが、コア側油路２２ｃは必要に応じてその位置を決定すればよく、上述した実施例に限定されるものではない。   Further, in the above-described embodiment, an example in which the core-side oil passage 22c is arranged at a position symmetrical with respect to the center in the axial direction has been described. However, the position of the core-side oil passage 22c may be determined as necessary. The present invention is not limited to the embodiment.

また、上述した実施例では、鋼板２２Ｃ1，２２Ｄ1及び鋼板２２Ｃ2，２２Ｄ2が鋼板２２Ａ1〜２２Ａ6，２２Ｂ6〜２２Ｂ1よりも軸方向の幅が大きい例を示したが、鋼板２２Ｃ1，２２Ｄ1及び鋼板２２Ｃ2，２２Ｄ2の軸方向の幅は任意であり、上述した実施例に限定されるものではない。 Further, in the above embodiment, although the steel plate 22C 1, 22D 1 and the steel plate 22C 2, 22D 2 is an example axial width is larger than the steel plate 22A 1 ~22A 6, 22B 6 ~22B 1, the steel plate 22C 1, 22D 1 and the steel plate 22C 2, 22D 2 in the axial width is arbitrary, but is not limited to the embodiments described above.

１ 巻線界磁型同期機
１０ ステータ
１１ ステータコア
１２ 巻線
２０ ロータ
２１ シャフト
２１ａ 中空部
２１ｂ，２１ｂ1，２１ｂ2 シャフト側油路
２２ ロータコア
２２Ａ1〜２２Ａn，２２Ｂ1〜２２Ｂn，２２Ｃ1，２２Ｃ2，２２Ｄ1，２２Ｄ2 鋼板
２２ａ バックヨーク
２２ｂ ティース
２２ｃ コア側油路
２２ｃA1〜２２ｃA6，２２ｃB1〜２２ｃB6 油路用孔
２３ 巻線
２３ａ コイル素線 1 winding field synchronous machine 10 stator 11 stator core 12 winding 20 rotor 21 shaft 21a hollow portion 21b, 21b 1, 21b 2 shaft side oil passage 22 rotor core 22A 1 ~22A n, 22B 1 ~22B n, 22C 1, 22C 2 , 22D 1 , 22D 2 Steel plate 22a Back yoke 22b Teeth 22c Core side oil passage 22c A1 to 22c A6 , 22c B1 to 22c B6 Oil passage hole 23 Winding 23a Coil strand

また、上記の課題を解決するための第２の発明に係る界磁巻線を含む回転子の冷却構造は、第１の発明において、
軸方向両側に位置する前記鋼板が、それぞれ前記バックヨークの径方向内側に開口する前記油路用孔を有し、
軸方向中央部に位置する少なくとも二つの前記鋼板が、前記バックヨークの径方向外側に開口する前記油路用孔を有し、
前記ロータコアが、軸方向中央部に位置する二つの前記鋼板の間に介在し、前記油路用孔を備えない鋼板を有している
ことを特徴とする。 In addition, a cooling structure of a rotor including a field winding according to a second invention for solving the above-mentioned problems, according to the first invention,
The steel plates located on both sides in the axial direction each have the oil passage hole that opens radially inward of the back yoke,
At least two steel plates located at the axial center portion have the oil passage holes that open radially outward of the back yoke,
The rotor core includes a steel plate that is interposed between the two steel plates located at the center in the axial direction and does not include the oil passage hole .

Claims (2)

中空部を有するシャフトと、
軸方向に複数の鋼板を積層して形成され前記シャフトに固定されるロータコアと、
前記ロータコアに巻回された界磁巻線と、
を含み、
前記シャフトは前記中空部と当該シャフトの外周面との間で貫通するシャフト側油路を周方向に複数備え、
前記鋼板は、バックヨークのスロットに対向する位置に、それぞれ当該バックヨークの径方向の幅より小さい一または複数の油路用孔を備え、
前記油路用孔は軸方向に隣接する前記鋼板に形成された油路用孔に対して径方向及び周方向に一部または全部が重なるように形成され、
少なくともひとつの前記鋼板の前記バックヨークに形成された前記油路用孔は前記バックヨークの径方向内側に開口し、
少なくとも他のひとつの前記鋼板の前記バックヨークに形成された前記油路用孔は前記バックヨークの径方向外側に開口し、
前記シャフト側油路の前記外周面側の開口部は前記バックヨークの径方向内側に開口した前記油路用孔に対向する位置に配設されている
ことを特徴とする界磁巻線を含む回転子の冷却構造。 A shaft having a hollow portion,
A rotor core formed by laminating a plurality of steel plates in the axial direction and fixed to the shaft,
A field winding wound around the rotor core,
Including
The shaft includes a plurality of shaft-side oil passages penetrating between the hollow portion and the outer peripheral surface of the shaft in a circumferential direction,
The steel plate includes one or a plurality of oil passage holes smaller than the radial width of the back yoke at positions facing the slots of the back yoke, respectively.
The oil passage hole is formed so as to partially or entirely overlap in the radial direction and the circumferential direction with respect to the oil passage hole formed in the steel plate adjacent in the axial direction,
The oil passage hole formed in the back yoke of at least one of the steel plates opens radially inward of the back yoke,
The oil passage hole formed in the back yoke of at least one other steel plate is opened radially outward of the back yoke,
An opening on the outer peripheral surface side of the shaft-side oil passage is provided at a position facing the oil passage hole opened radially inward of the back yoke. Rotor cooling structure. 軸方向両側に位置する前記鋼板が、それぞれ前記バックヨークの径方向内側に開口する前記油路用孔を有し、
軸方向中央部に位置する少なくとも二つの前記鋼板が、前記バックヨークの径方向外側に開口する前記油路用孔を有し、
前記ロータコアが、軸方向中央部に位置する二つの前記鋼板の間に介在し、前記油路用穴を備えない鋼板を有している
ことを特徴とする請求項１に記載の界磁巻線を含む回転子の冷却構造。 The steel plates located on both sides in the axial direction each have the oil passage hole that opens radially inward of the back yoke,
At least two steel plates located at the axial center portion have the oil passage holes that open radially outward of the back yoke,
2. The field winding according to claim 1, wherein the rotor core includes a steel plate that is interposed between the two steel plates located at the center in the axial direction and does not include the oil passage hole. 3. Rotor cooling structure including.
JP2018166069A 2018-09-05 2018-09-05 Cooling structure of rotor including field winding Pending JP2020039230A (en)

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