JP3465157B2 - Cooling structure of rotor with permanent magnet - Google Patents
Cooling structure of rotor with permanent magnetInfo
- Publication number
- JP3465157B2 JP3465157B2 JP26904897A JP26904897A JP3465157B2 JP 3465157 B2 JP3465157 B2 JP 3465157B2 JP 26904897 A JP26904897 A JP 26904897A JP 26904897 A JP26904897 A JP 26904897A JP 3465157 B2 JP3465157 B2 JP 3465157B2
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- end plate
- field core
- field
- 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
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、発電機等の回転
子の界磁鉄心に永久磁石を埋設した永久磁石付回転子の
冷却構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a rotor with a permanent magnet in which a permanent magnet is embedded in a field core of a rotor of a generator or the like.
【０００２】[0002]
【従来の技術】永久磁石を埋め込む収納孔を外周に近接
した位置に備えた界磁鉄心片を積層して形成した界磁鉄
心を備え、この収納孔に永久磁石を埋設してなる発電機
の回転子は発電機が稼働するに伴い電機子からの輻射熱
により界磁鉄心が熱せられ、この輻射熱による永久磁石
の温度上昇等による発電機としての出力低下をもたらし
ていた。2. Description of the Related Art A generator having a field core formed by stacking field core pieces having a storage hole for embedding a permanent magnet close to the outer periphery and having a permanent magnet embedded in the storage hole As the generator operates, the field iron core of the rotor is heated by the radiant heat from the armature, and the radiant heat causes a decrease in the output of the generator due to an increase in the temperature of the permanent magnet.
【０００３】このように従来の回転子において、界磁鉄
心片を積層した界磁鉄心内の冷却空気の流れは不充分
で、冷却効率は低く、発電機の出力の増加は望めなかっ
た。特に、永久磁石を埋設したものにおいては温度上昇
が顕著であった。As described above, in the conventional rotor, the flow of the cooling air in the field core in which the field core pieces are laminated is insufficient, the cooling efficiency is low, and the output of the generator cannot be increased. In particular, the temperature rise was remarkable in the case where the permanent magnet was embedded.
【０００４】[0004]
【発明が解決しようとする課題】この発明の課題は、こ
のような電機子からの輻射熱により、回転子を形成する
界磁鉄心または界磁鉄心に埋設された永久磁石の温度上
昇による発電機の出力低下を改善するために、界磁鉄心
や永久磁石を効率よく冷却し、これらの温度上昇による
発電機の出力低下を抑えた永久磁石付回転子の冷却構造
を提供するものである。SUMMARY OF THE INVENTION An object of the present invention is to improve the temperature of a field core forming a rotor or a permanent magnet embedded in the field core due to radiant heat from such an armature. The present invention provides a cooling structure for a rotor with a permanent magnet, which efficiently cools a field iron core and a permanent magnet in order to improve a reduction in output and suppresses a reduction in output of a generator due to a temperature rise of these.
【０００５】[0005]
【課題を解決するための手段】この発明は、上述事情に
鑑みてなされたものであって、界磁鉄心片を積層してな
る界磁鉄心に複数個の永久磁石を埋設し、この界磁鉄心
の両側面に配置することにより前記界磁鉄心を固定する
端板の外側面に複数の翼片を備え、この翼片により外側
にある電機子巻線へ冷却空気の流れを生じさせる永久磁
石付回転子において、前記界磁鉄心の永久磁石の両端
に、この永久磁石の表面に接して軸方向の通風路を配設
し、前記界磁鉄心の両端板の外周縁の内側面に、外周面
側を閉塞し軸心側を開口してなる吸入口を備えた凹溝
と、軸心側を閉塞し外周面側を開口してなる吐出口を備
えた凹所とを均等間隔で交互に配置し、一方の端板の前
記凹溝位置に対向して他方の端板の凹所を配置するとと
もに、前記永久磁石の両端に形成される前記通風路を前
記端板の凹所、凹溝とに対向させて前記界磁鉄心の両側
面に前記両端板を固定することにより、前記界磁鉄心を
前記両端板で挟持し、前記両端板の内側面と前記界磁鉄
心の外側面の間に隙間を設けて冷却空気の流通路を形成
してなり、前記永久磁石付回転子の回転に伴い冷却空気
が前記凹溝の吸入口から吸い込まれ、前記流通路と前記
永久磁石の両端に形成される前記通風路を通り、この凹
溝に対向する反対側の前記端板凹所の吐出口から吐き出
されるようにして前記界磁鉄心および前記永久磁石を冷
却する構成によって前記課題は達成できる。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a plurality of permanent magnets are embedded in a field core formed by laminating field core pieces. A permanent magnet having a plurality of blades on the outer surface of the end plate for fixing the field core by being arranged on both sides of the iron core, the permanent magnets causing a flow of cooling air to the outer armature winding by the blades. in with the rotor, the opposite ends of the permanent magnet before Symbol field core, and disposed air passage in the axial direction in contact with the surface of the permanent magnet, the inner surface of the outer peripheral edge of the end plates of the field core, Outer peripheral surface
Groove with a suction port closed on the side and opened on the axial side
And a discharge port that closes the shaft center side and opens the outer peripheral surface side.
The recesses and the recesses that have been
If you place the recess of the other end plate facing the groove position,
In front of the air passages formed at both ends of the permanent magnet.
Both sides of the field core facing the recess and groove of the end plate
By fixing the both end plates to the surface, the field core
It is sandwiched between the both end plates, and the inner surface of the both end plates and the field iron
A gap is provided between the outer surfaces of the core to form a flow path for cooling air
The cooling air accompanying the rotation of the rotor with permanent magnet
Is sucked in from the suction port of the groove, and the flow passage and the
Pass through the ventilation passages formed at both ends of the permanent magnet and
Discharge from the discharge port of the end plate recess on the opposite side facing the groove
The field iron core and the permanent magnet.
The above-mentioned problem can be achieved by the configuration which is eliminated .
【０００６】[0006]
【０００７】更に、前記端板の内側に設けた凹溝と凹所
との間に複数の仕切壁を設け、この仕切壁の高さを前記
凹溝や前記凹所の周囲突部と同じ高さにし、この端板を
前記界磁鉄心の両側より挟着したとき、この端板と接触
する前記界磁鉄心の外側面との間に、前記仕切壁と前記
凹溝や前記凹所の周囲突部によって仕切られる隙間を形
成し、前記永久磁石付回転子の回転に伴いこの隙間から
冷却空気が吐き出される構成によって達成できる。Furthermore, a plurality of partition walls between the grooves and recesses provided on the inner side of the end plate, the height of the partition walls as high as the surrounding projections of the concave grooves and said recess Sanishi, the end plate
When clamped from both sides of the field core, between the outer surface of the field core in contact with the end plate, the said partition wall
Forming a gap partitioned by surrounding projection of the groove and the recess, the cooling air from the gap with the rotation of the rotor with the permanent magnets can be achieved by the configuration issued come ejection.
【０００８】[0008]
【０００９】[0009]
【発明の実施の形態】この発明の永久磁石付回転子を使
用した発電機（溶接用発電機）について以下に説明す
る。この発明の永久磁石付回転子の冷却構造は、この回
転子の両側端板の外側面に翼片を突出し、この端板の内
側面と界磁鉄心の外側面との間に冷却空気が流れる隙間
を形成するとともに界磁鉄心に埋設した永久磁石の両端
に通風路を形成してあるから、図１３に示されるように
外筐カバーの吸気孔より冷却空気の強制流入があり、界
磁鉄心の中心部に入り込み、この冷却空気の一部は端板
内側の界磁鉄心の外側面との間の隙間、前記凹溝の吸入
口より流入し、界磁鉄心外側表面を経由して永久磁石を
埋め込んで形成される両端の通風路で、隣接する通風路
を通り（図１２参照）、界磁鉄心と永久磁石を冷却しな
がら反対側（後面）の端板内面の外側凹所を経由して吐
出口により外側に吐き出すので、界磁鉄心のみならず永
久磁石の表面を直接冷却することができるから発電機の
出力の減少を抑える。BEST MODE FOR CARRYING OUT THE INVENTION A generator (welding generator) using the rotor with a permanent magnet of the present invention will be described below. According to the cooling structure for a rotor with a permanent magnet of the present invention, blades are projected on the outer surfaces of both end plates of the rotor, and cooling air flows between the inner surface of the end plates and the outer surface of the field core. Since a ventilation path is formed at both ends of the permanent magnet embedded in the field core as well as forming a gap, there is a forced inflow of cooling air from the intake hole of the outer casing cover as shown in FIG. Part of this cooling air flows into the gap between the outer surface of the field core inside the end plate and the suction port of the concave groove, and passes through the outer surface of the field core to the permanent magnet. The air passages at both ends formed by embedding the same, passing through the adjacent air passages (see FIG. 12), while cooling the field core and the permanent magnets and passing through the outer recesses on the inner surface of the end plate on the opposite side (rear surface). Is discharged to the outside through the discharge port, so that not only the field core but also the surface of the permanent magnet is cooled directly. Suppress a decrease in the output of the generator because it can be.
【００１０】また、前記冷却空気の他の一部は回転子の
界磁鉄心外側面と前後の端板内面との間に仕切壁および
凹溝等の周囲突部による通風路となる隙間が形成される
ため仕切壁及び凹溝および凹所の周囲突部がファンの翼
片と同じ効果を発揮し（ファン効果）、界磁鉄心の中心
部よりこの隙間を通って外側に吐出させて、界磁鉄心の
側面および永久磁石の側面の冷却効率の向上をもたらさ
れる。更に、この界磁鉄心の両側面に固定する端板は、
凹溝と凹所をその内面に均等間隔で交互に配置してある
から、一方を反転し、軸中心に１ピッチずらせば、凹溝
と凹所を対向して組立てられるから両端板の形状を同一
にすることができる。そのため一つの鋳型によって両端
板を製造することができる。そのうえ、この発明の永久
磁石付回転子の冷却構造は、界磁鉄心の永久磁石の両端
に形成される通風路内により多くの冷却空気を取り入れ
るために、両側端板の翼片の外周縁に張出した邪魔板に
より通気口に冷却空気を取り入れ、これを永久磁石の通
風路を通して、反対側の端板の通気口から外部に排出さ
せるようにすることもできるから冷却効率を向上させる
ことができる。なお、端板の内周側（軸心側周縁）の外
側面には補強用のフランジが形成され、このフランジに
よって端板の平面性が維持され、界磁鉄心の両側から強
固に固定することができる。A part of the other part of the cooling air forms a gap between the outer surface of the field core of the rotor and the inner surfaces of the front and rear end plates, which serves as an air passage due to peripheral projections such as partition walls and concave grooves. Therefore, the partition wall, the groove, and the peripheral projections of the recess exert the same effect as the fan blades (fan effect), and discharge from the center of the field iron core to the outside through this gap, The cooling efficiency of the side surface of the magnetic core and the side surface of the permanent magnet is improved. Furthermore, the end plates fixed to both side surfaces of this field iron core are
Since the groove and the recess are alternately arranged on the inner surface at equal intervals, if one side is reversed and the shaft center is shifted by one pitch, the groove and the recess can be assembled to face each other, so the shape of both end plates can be changed. Can be the same. Therefore, both end plates can be manufactured by one mold. In addition, the cooling structure of the rotor with a permanent magnet of the present invention is provided on the outer peripheral edges of the blades of both end plates in order to take in more cooling air into the ventilation passages formed at both ends of the permanent magnet of the field iron core. Cooling air can be taken into the ventilation port by the overhanging baffle and discharged through the ventilation path of the permanent magnet to the outside from the ventilation port of the end plate on the opposite side, so that the cooling efficiency can be improved. . In addition, a reinforcing flange is formed on the outer surface on the inner peripheral side (peripheral edge of the shaft center) of the end plate, and the flatness of the end plate is maintained by this flange, and it is firmly fixed from both sides of the field core. You can
【００１１】図１はこの発明の永久磁石付回転子の一部
断面の側面図である。図２はこの発明の永久磁石付回転
子に使用する界磁鉄心片の平面図である。図３はこの発
明の永久磁石付回転子の界磁鉄心の外周縁の部分拡大平
面図である。図４はこの発明の永久磁石付回転子の斜視
図である。図５はこの発明の永久磁石付回転子の端板の
斜視図である。図６は図５の内側面平面図である。図７
は図６の端板の断面図で、（ａ）はＦ−Ｆ断面図，
（ｂ）はＧ−Ｇ断面図，（ｃ）はＨ−Ｈ断面図である。
図８〜図１１はこの発明の永久磁石付回転子の断面部分
拡大図である。図１２は図８のＥ矢視拡大図である。図
１３はこの発明の永久磁石付回転子を組み込んだ発電機
の一部断面の側面図である。図１４はこの永久磁石付回
転子に外筐カバーを施した正面図である。図１５はこの
発明の界磁鉄心の他の実施例の部分拡大平面図である。
図１６は永久磁石付回転子に使用する端板に邪魔板を設
けた参考例を示した外側面図である。図１７は図１６の
内側面図である。図１８は図１６の永久磁石付回転子の
空気の流れを示す説明図である。FIG. 1 is a side view of a partial cross section of a rotor with a permanent magnet according to the present invention. FIG. 2 is a plan view of a field core piece used in the rotor with a permanent magnet of the present invention. FIG. 3 is a partially enlarged plan view of the outer peripheral edge of the field core of the rotor with a permanent magnet of the present invention. FIG. 4 is a perspective view of the rotor with a permanent magnet of the present invention. FIG. 5 is a perspective view of an end plate of the rotor with a permanent magnet according to the present invention. FIG. 6 is a plan view of the inside surface of FIG. Figure 7
Is a sectional view of the end plate of FIG. 6, (a) is a sectional view taken along line F-F,
(B) is a GG sectional view and (c) is an HH sectional view.
8 to 11 are enlarged sectional views of a rotor with a permanent magnet according to the present invention. FIG. 12 is an enlarged view of arrow E in FIG. FIG. 13 is a side view of a partial cross section of a generator incorporating the rotor with a permanent magnet of the present invention. FIG. 14 is a front view of the rotor with a permanent magnet provided with an outer casing cover. FIG. 15 is a partially enlarged plan view of another embodiment of the field core of the present invention.
16 is an outer view showing a reference example in which a baffle plate to the end plate for use in a rotor with permanent magnets. FIG. 17 is an inside view of FIG. FIG. 18 is an explanatory view showing the air flow of the rotor with permanent magnets of FIG.
【００１２】１は永久磁石２を埋設するための複数個の
長孔の貫通孔３を外周に近接して穿設した界磁鉄心片
で、一般的な複数個の台形孔が穿設してある。これを複
数枚積層して貫通孔３に永久磁石２を挿入することによ
り両端に端部３ａ，３ａが形成される。この界磁鉄心片
１を積層した界磁鉄心において前記台形孔による貫通路
内に冷却空気が流れる。４は界磁鉄心片１を積層した界
磁鉄心の両側から挟着する端板である。この端板４の外
側面の周縁には翼片５を等間隔に突出して設けてあり、
この内側面には軸心側が開放され外周側が閉塞された所
定幅の凹溝６や、外周側が開放され軸心側が閉塞された
凹所７が等間隔に穿設してある。これら凹溝６と凹所７
は隣接して均等間隔で交互に配置する。この交互に配置
する形態は図６に示すように２個ずつ凹溝６を隣接し、
その隣に凹所７を２個隣接して交互に配置することもで
きる。この数は界磁鉄心片１のバランスを考慮して決定
する。Reference numeral 1 denotes a field core piece having a plurality of through holes 3 each having a long hole for burying a permanent magnet 2 formed in the vicinity of the outer periphery thereof, and a plurality of general trapezoidal holes are formed. is there. By laminating a plurality of these and inserting the permanent magnet 2 into the through hole 3, the end portions 3a, 3a are formed at both ends. In the field iron core in which the field iron core pieces 1 are laminated, cooling air flows in the through passage formed by the trapezoidal hole. Reference numeral 4 is an end plate that is sandwiched from both sides of the field core formed by stacking the field core pieces 1. Wing pieces 5 are provided so as to project at equal intervals on the outer peripheral edge of the end plate 4,
On the inner side surface, concave grooves 6 having a predetermined width, which are open on the axial center side and closed on the outer peripheral side, and recesses 7 which are open on the outer peripheral side and closed on the axial center side, are formed at equal intervals. These groove 6 and recess 7
Are adjacently arranged alternately at equal intervals. As shown in FIG. 6, the alternate arrangement forms two recessed grooves 6 adjacent to each other,
Two recesses 7 may be arranged adjacent to each other and adjacent to each other. This number is determined in consideration of the balance of the field core piece 1.
【００１３】８は端板４の内側に所定間隔で突設した仕
切壁である。これら凹溝６の周囲突部６ａ、凹所７の周
囲突部７ａおよび仕切壁８の高さは同一であって、界磁
鉄心片１の側面に接するようになっている。仕切壁８と
各周囲突部６ａ，７ａによって囲まれる隙間２１は界磁
鉄心片１の側面との間で空気の流れを生じるようになっ
ている。１０は界磁鉄心片１の固定用のボルト９を挿入
する端板４に設けたボルト孔である。１１は回転子を包
囲する外筐カバーで、空気取り入れ用の吸気孔１２およ
び排気孔１３が多数穿設してある。界磁鉄心片１には放
射状に配置して形成したカシメ部１４、界磁鉄心片１を
積層して組み立てるときのガイド溝１５や界磁鉄心片１
の反転状況を視認する目印溝１６が穿設してある。端板
４の内周側の外側に張出してフランジ２２が設けてあ
る。Reference numeral 8 is a partition wall which is provided inside the end plate 4 at a predetermined interval. The peripheral projections 6a of the recessed grooves 6, the peripheral projections 7a of the recesses 7 and the partition wall 8 have the same height, and are in contact with the side surfaces of the field core piece 1. A gap 21 surrounded by the partition wall 8 and each of the peripheral protrusions 6a and 7a is configured to generate an air flow between the side wall of the field core piece 1. Reference numeral 10 is a bolt hole provided in the end plate 4 into which the bolt 9 for fixing the field core piece 1 is inserted. An outer casing cover 11 surrounds the rotor, and has a large number of intake holes 12 and exhaust holes 13 for taking in air. The field iron core piece 1 has caulked portions 14 formed radially, and the guide groove 15 and the field iron core piece 1 when the field iron core piece 1 is laminated and assembled.
A mark groove 16 for visually recognizing the reversal state is formed. A flange 22 is provided so as to extend outside the inner peripheral side of the end plate 4.
【００１４】この発明の永久磁石付回転子の冷却構造に
ついて図面に従って説明する。界磁鉄心片１の貫通孔３
は両端が中央部分より狭く形成して段差を設けて内部に
挿入する永久磁石２の位置決めをしてあり、この両端に
端部３ａ，３ａが形成されるようになっている。この貫
通孔３の端部３ａ，３ａ部分の外周側は斜線３ｂが形成
され、外周縁の界磁鉄心片１の強度が保持されている。
また、この貫通孔３，３′間１ａは狭くなるように設け
てある。前記貫通孔３の中央部分の幅広い所に矩形状の
永久磁石２を装填する。この永久磁石２の形状は特定さ
れるものでもない。この界磁鉄心片１をガイド溝１５に
沿って複数枚積層し、目印溝１６で確認しながらこの界
磁鉄心片１を反転して複数枚積層して界磁鉄心を組み立
てる。この界磁鉄心の前後両側から端板４を、翼片５を
外側にして挟み、ボルト孔１０にボルト９を挿通して固
定する。このとき前側の端板４の内側凹溝６に対向して
後側の端板４の凹所７が位置するように合わせる。すな
わち、同一形状の端板４の内面の位置を対向させて１ピ
ッチ位置（図１参照）をずらして界磁鉄心を挟持固定す
る。これら凹溝６や凹所７は界磁鉄心片１の貫通孔３と
これに隣接する貫通孔３′のそれぞれの端部３ａ，３′
ａに対向する（図１２参照）。A cooling structure for a rotor with a permanent magnet according to the present invention will be described with reference to the drawings. Field iron core piece 1 through hole 3
Has both ends formed to be narrower than the central portion, and a step is provided to position the permanent magnet 2 to be inserted therein, and end portions 3a, 3a are formed at both ends. A diagonal line 3b is formed on the outer peripheral side of the end portions 3a, 3a of the through hole 3 to maintain the strength of the field core piece 1 at the outer peripheral edge.
Further, the space 1a between the through holes 3 and 3'is provided so as to be narrow. A rectangular permanent magnet 2 is loaded in a wide area in the central portion of the through hole 3. The shape of the permanent magnet 2 is not specified. A plurality of the field core pieces 1 are laminated along the guide groove 15, and while confirming with the mark groove 16, the field core pieces 1 are inverted and laminated to assemble the field core. The end plate 4 is sandwiched from both front and rear sides of this field iron core with the blade piece 5 on the outside, and the bolt 9 is inserted into the bolt hole 10 to be fixed. At this time, the front end plate 4 is aligned so that the recess 7 of the rear end plate 4 is located so as to face the inner groove 6 of the front end plate 4. That is, the positions of the inner surfaces of the end plates 4 having the same shape are opposed to each other and the one pitch position (see FIG. 1) is shifted to sandwich and fix the field core. These recessed grooves 6 and recesses 7 are the end portions 3a, 3'of the through hole 3 of the field core piece 1 and the through hole 3'adjacent thereto.
It faces a (see FIG. 12).
【００１５】この発明の永久磁石付回転子の冷却構造
は、端板４に設けた一個の凹溝６と界磁鉄心片１の貫通
孔３の端部３ａおよび貫通孔３′の端部３′ａが対峙
し、この端部３ａ，３′ａに後側の端板４の一個の凹所
７が対応して外周面に吐出口が開放されている。これに
より端板４の全ての凹溝６と凹所７とが界磁鉄心片１の
端部３ａ、３′ａを介して連通している（図１２参
照）。このように構成されているので、回転子が回転す
ると、端板４の外側面に突出した翼片５および内側面の
仕切壁８、周囲突部６ａ，７ａの回転によるファン効果
で、冷却空気が外筐カバー１１の吸気孔１２から吸引さ
れ、界磁鉄心の台形孔による貫通路内に吸引される。こ
の冷却空気の一部は回転子の軸心側から吸入され、端板
４の凹溝６から入り、遠心力により内部側の空気等の粒
子が外側に押し出され、界磁鉄心片１の隣接する貫通孔
３，３′の端部３ａ、３′ａを経て凹所７の外周側の吐
出口から吐き出される。また、前記冷却空気の他の一部
は仕切壁８や各凹溝６の周囲突部６ａ，各凹所７の周囲
突部７ａに囲まれる隙間２１を通過する風の流れを生じ
る。従って、永久磁石２の表面を直接冷却することにな
り、更に、この冷却空気の風によりこの回転子の外側の
電機子巻線１７も冷却することになる。In the cooling structure for a rotor with a permanent magnet according to the present invention, one concave groove 6 provided in the end plate 4, the end 3a of the through hole 3 of the field core piece 1 and the end 3 of the through hole 3'are provided. ′ A face each other, and one recess 7 of the rear end plate 4 corresponds to the end portions 3a and 3′a, and the discharge port is opened to the outer peripheral surface. As a result, all the recessed grooves 6 and the recesses 7 of the end plate 4 are communicated with each other through the ends 3a and 3'a of the field core piece 1 (see FIG. 12). With this configuration, when the rotor rotates, the cooling effect of the cooling air is generated by the fan effect due to the rotation of the blade piece 5 protruding to the outer surface of the end plate 4, the partition wall 8 on the inner surface, and the peripheral projections 6a and 7a. Is sucked from the air intake hole 12 of the outer casing cover 11 and is sucked into the through passage formed by the trapezoidal hole of the field iron core. Part of this cooling air is sucked in from the axial center side of the rotor, enters from the concave groove 6 of the end plate 4, and particles such as air on the inner side are pushed out by the centrifugal force to the outside of the field core piece 1. It is discharged from the discharge port on the outer peripheral side of the recess 7 through the end portions 3a, 3'a of the through holes 3, 3 '. Further, another part of the cooling air causes a flow of wind that passes through the partition wall 8, the peripheral projections 6a of the recessed grooves 6, and the gap 21 surrounded by the peripheral projections 7a of the recesses 7. Therefore, the surface of the permanent magnet 2 is directly cooled, and the wind of the cooling air also cools the armature winding 17 outside the rotor.
【００１６】このように外筐カバー１１の吸気孔１２か
ら流入された冷却空気の風の流れは、主として図１３に
示されるように端板４の翼片５により界磁鉄心片１の表
面に接触しながら外側の電機子巻線１７側へ排風され
る。他方、そして前記冷却空気の一部は凹溝６、隣接す
る貫通孔３，３′の端部３ａ，３′ａの通風路を経由
し、内側の凹所７から吐出する（図９参照）。また、他
の一部は内側端板４の凹溝６から貫通孔３，３′を経由
し、外側の凹所７から吐出する（図１０参照）。更に、
他の一部は前後の端板４の仕切壁８と各凹溝６，各凹所
７のそれぞれの周囲突部６ａ，７ａによって仕切られる
隙間２１を通って界磁鉄心片１の側面および永久磁石２
の側面に直接接触しながら外側に吐出される（図１１参
照）。これらの冷却空気の流れにより、界磁鉄心片１の
側面や永久磁石２の側面が直接冷却され、冷却効率に優
れ、これらの温度上昇を抑制することができる。図９〜
１２の矢印は風の流れを示す。図１２の◎印は図面の裏
側から表側に風が流れている方向を示す。The flow of the cooling air, which has flowed in through the intake holes 12 of the outer casing cover 11 as described above, mainly reaches the surface of the field core piece 1 by the blades 5 of the end plate 4 as shown in FIG. The air is exhausted to the outside armature winding 17 side while making contact. On the other hand, part of the cooling air is discharged from the inner recess 7 through the concave groove 6 and the ventilation passages of the end portions 3a and 3'a of the adjacent through holes 3 and 3 '(see FIG. 9). . The other part is discharged from the concave groove 6 of the inner end plate 4 through the through holes 3 and 3'and from the outer concave portion 7 (see FIG. 10). Furthermore,
The other part passes through the partition walls 8 of the front and rear end plates 4 and the recesses 6 and the gaps 21 partitioned by the peripheral projections 6a and 7a of the recesses 7, respectively. Magnet 2
Is discharged to the outside while directly contacting the side surface (see FIG. 11). Due to the flow of these cooling air, the side surface of the field core piece 1 and the side surface of the permanent magnet 2 are directly cooled, the cooling efficiency is excellent, and the temperature rise of these can be suppressed. 9-
The arrow 12 indicates the wind flow. The ⊚ mark in FIG. 12 indicates the direction in which wind flows from the back side to the front side of the drawing.
【００１７】この発明の永久磁石付回転子は、永久磁石
２を位置決めする位置決め手段として貫通孔３の両端を
中央部分より幅狭く形成して段差を設けてあるが、この
段差を設けることなく、この両端部３ａ，３ａに一部空
間部分、すなわち、冷却空気の通路を形成する通風路を
残して非磁性体１８を挿入して、永久磁石２を固定する
こともできる（図１５参照）。この場合、この非磁性体
１８は端部３ａの軸心側に固定する。非磁性体１８は永
久磁石２の両端に固定するように取付ける。このような
非磁性体１８で位置決めすることにより貫通孔３の大き
さに関係なく、これに挿入する永久磁石２は種々の大き
さの寸法の異なるものを使用することができる。In the rotor with a permanent magnet according to the present invention, both ends of the through hole 3 are formed to have a width narrower than the central portion as a positioning means for positioning the permanent magnet 2, and a step is provided. However, without providing this step, It is also possible to fix the permanent magnet 2 by inserting the non-magnetic body 18 into the both end portions 3a, 3a while leaving a partial space portion, that is, a ventilation passage forming a passage for the cooling air (see FIG. 15). In this case, the non-magnetic body 18 is fixed on the axial center side of the end portion 3a. The non-magnetic body 18 is attached so as to be fixed to both ends of the permanent magnet 2. By positioning with such a non-magnetic body 18, regardless of the size of the through hole 3, the permanent magnet 2 to be inserted into the through hole 3 can have various sizes and different sizes.
【００１８】また、図１６に示すように、参考例の永久
磁石付回転子では、両側の端板４の各翼片５の外周縁
に、一方の端板４では邪魔板１９を回転方向側に張出し
て取付けるとともにこの邪魔板１９の下側、すなわち、
軸心側に通気口２０を穿設してある。この前後の端板４
を界磁鉄心の両側から挟着することにより他方の端板４
では反回転方向に邪魔板１９が張り出すことになる。こ
のように形成した永久磁石付回転子が回転すると翼片５
の邪魔板１９により通気口２０から吸入され、永久磁石
２の通風路を形成する隣接した端部３ａ，３’ａを通
り、対向側の端板４の通気口２０から冷却空気が吐き出
されることになる（図１８参照）。このような風の流れ
により界磁鉄心および永久磁石２の側面が直接冷却さ
れ、冷却効率を向上することができる。Further, as shown in FIG. 16, a permanent reference example
In the rotor with magnets , the baffle plate 19 of one end plate 4 is attached to the outer peripheral edge of each blade 5 of the end plates 4 on both sides so as to extend in the rotational direction, and the lower side of the baffle plate 19, that is,
A ventilation port 20 is formed on the axial center side. Front and rear end plates 4
The other end plate 4 by sandwiching the field core from both sides.
Then, the baffle plate 19 projects in the anti-rotation direction. When the rotor with a permanent magnet formed in this way rotates, the blade 5
Of the cooling air is sucked from the vent hole 20 by the baffle plate 19 and passes through the adjacent end portions 3a and 3'a forming the ventilation path of the permanent magnet 2, and is discharged from the vent hole 20 of the end plate 4 on the opposite side. (See FIG. 18). Such a flow of wind directly cools the field iron core and the side surfaces of the permanent magnet 2, thereby improving the cooling efficiency.
【００１９】図１８に示すごとく端板４の各翼片５に邪
魔板１９を回転方向に張出し、一方方向から冷却空気が
吸入され、反対側に流れるようになっている。この通気
口２０は翼片５の強度の関係で翼片５の位置からやや離
れた位置で、邪魔板１９に近接して穿設してある。As shown in FIG. 18 , a baffle plate 19 is extended in the rotational direction on each blade 5 of the end plate 4 so that cooling air is sucked in from one direction and flows to the other side. The vent hole 20 is formed at a position slightly away from the position of the wing piece 5 due to the strength of the wing piece 5 and close to the baffle plate 19.
【００２０】この発明の永久磁石付回転子は、界磁鉄心
と両端板の間に仕切壁、凹溝や凹所の周囲突部の高さを
同一にして隙間を設けてあっても積層された界磁鉄心を
強固に固定し、永久磁石の軸方向の位置決めができる。In the rotor with a permanent magnet according to the present invention, even if the partition wall, the groove and the peripheral projections of the recess are made to have the same height between the field core and the both end plates, a laminated field is formed. The magnetic core can be firmly fixed and the permanent magnet can be positioned in the axial direction.
【００２１】[0021]
【発明の効果】この発明の永久磁石付回転子の冷却構造
は、界磁鉄心に接触して冷却空気が流れ、特に、埋設し
た永久磁石に直接接触して流れ冷却空気が通過するか
ら、界磁鉄心片のみならず永久磁石も冷却することがで
きるので、電機子からの輻射熱により界磁鉄心等の温度
上昇を抑制することができ、発電機の出力の減少を抑え
ることができる。また、同一形状の端板を界磁鉄心の両
側に使用することになるので組み合せが容易であるばか
りでなく、鋳型が１個でよいという利点がある。According to the cooling structure for a rotor with a permanent magnet of the present invention, the cooling air flows in contact with the field iron core, and in particular, the cooling air flows in direct contact with the embedded permanent magnet. Since not only the magnet core piece but also the permanent magnet can be cooled, it is possible to suppress the temperature rise of the field core and the like due to the radiant heat from the armature, and to suppress the decrease in the output of the generator. Further, since the end plates having the same shape are used on both sides of the field core, there is an advantage that not only the combination is easy but also one mold is enough.
【図１】この発明の永久磁石付回転子の一部断面の側面
図である。FIG. 1 is a side view of a partial cross section of a rotor with a permanent magnet of the present invention.
【図２】この発明の永久磁石付回転子に使用する界磁鉄
心片の平面図である。FIG. 2 is a plan view of a field core piece used in the rotor with a permanent magnet according to the present invention.
【図３】この発明の永久磁石付回転子の界磁鉄心に永久
磁石を埋設した状態の部分拡大平面図である。FIG. 3 is a partially enlarged plan view showing a state in which a permanent magnet is embedded in a field iron core of the rotor with a permanent magnet of the present invention.
【図４】この発明の永久磁石付回転子の斜視図である。FIG. 4 is a perspective view of a rotor with a permanent magnet according to the present invention.
【図５】この発明の永久磁石付回転子の端板の斜視図で
ある。FIG. 5 is a perspective view of an end plate of the rotor with a permanent magnet of the present invention.
【図６】図５の内側面平面図である。FIG. 6 is a plan view of the inner side surface of FIG.
【図７】図６の端板の断面図で、（ａ）はＦ−Ｆ断面
図，（ｂ）はＧ−Ｇ断面図，（ｃ）はＨ−Ｈ線断面図で
ある。7 is a cross-sectional view of the end plate of FIG. 6, (a) is a FF cross-sectional view, (b) is a GG cross-sectional view, and (c) is a H-H line cross-sectional view.
【図８】この発明の永久磁石付回転子の図１のＡ−Ａ断
面部分拡大図である。FIG. 8 is a partially enlarged view of the rotor with a permanent magnet of the present invention taken along the line AA of FIG.
【図９】この発明の永久磁石付回転子の冷却空気の流れ
を示す図１のＢ−Ｂ断面部分拡大図である。FIG. 9 is a partially enlarged view of a BB cross section of FIG. 1 showing a flow of cooling air of the rotor with a permanent magnet of the present invention.
【図１０】図９と同様の図１のＣ−Ｃ断面部分拡大図で
ある。10 is a partially enlarged view of a CC cross section of FIG. 1 similar to FIG.
【図１１】図９と同様の図１のＤ−Ｄ断面部分拡大図で
ある。FIG. 11 is a partially enlarged view taken along the line D-D of FIG. 1 similar to FIG. 9.
【図１２】この発明の永久磁石付回転子の冷却空気の流
れを示す図で、（ａ）は図９のＥ矢視拡大図である。
（ｂ）は図１２（ａ）のＩ−Ｉ断面拡大図である。
（ｃ）は図１２（ａ）のＪ−Ｊ断面拡大図である。12 is a view showing the flow of cooling air in the rotor with a permanent magnet according to the present invention, and FIG. 12 (a) is an enlarged view of the arrow E in FIG.
FIG. 12B is an enlarged cross-sectional view taken along the line I-I of FIG.
FIG. 12C is an enlarged view taken along line JJ of FIG.
【図１３】この発明の永久磁石付回転子を組み込んだ発
電機の一部断面の側面図である。FIG. 13 is a side view of a partial cross section of a generator incorporating the rotor with a permanent magnet of the present invention.
【図１４】この発明の永久磁石付回転子の外筐カバー施
した正面図である。FIG. 14 is a front view of the rotor with permanent magnet of the present invention with an outer casing cover.
【図１５】この発明の界磁鉄心片の永久磁石の両端に非
磁性体を埋設した部分拡大平面図である。FIG. 15 is a partially enlarged plan view in which a non-magnetic material is embedded at both ends of the permanent magnet of the field core piece of the present invention.
【図１６】永久磁石付回転子に使用する端板に邪魔板を
設けた参考例を示した外側面図である。[16] is an outer view showing a reference example in which a baffle plate on the end plate to be used for permanent rotor with magnets.
【図１７】図１６の内側面図である。FIG. 17 is an inner side view of FIG.
【図１８】図１６の空気の流れを示す説明図である。FIG. 18 is an explanatory diagram showing the flow of air in FIG. 16.
１ …界磁鉄心片 ２ …永久磁石 ３ …貫通孔 ３ａ…端部 ４ …端板 ５ …翼板 ６ …凹溝 ６ａ…周囲突部 ７ …凹所 ７ａ…周囲突部 ８ …仕切壁 ９ …ボルト １０ …ボルト孔 １１ …外筐カバー １２ …吸気孔 １３ …排気孔 １４ …カシメ部 １５ …ガイド溝 １６ …目印溝 １７ …電機子巻線 １８ …非磁性体 １９ …邪魔板 ２０ …通気口 ２１ …隙間 ２２ …フランジ 1… Field iron core piece 2 ... Permanent magnet 3 ... Through hole 3a ... end 4 ... End plate 5 ... wing plate 6… Concave groove 6a ... Surrounding protrusion 7 ... Recess 7a ... Surrounding protrusion 8 ... Partition wall 9 ... bolt 10 ... Bolt hole 11 ... Outer casing cover 12 ... Intake hole 13 ... Exhaust hole 14 ... Caulking part 15… Guide groove 16 ... Mark groove 17 ... Armature winding 18 ... Non-magnetic material 19 ... Baffle board 20 ... Vent 21 ... Gap 22 ... Flange
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０２Ｋ 9/08 Ｈ０２Ｋ 9/08 Ｂ (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/32 H02K 1/27 501 H02K 9/04 H02K 9/08 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 identification code FI H02K 9/08 H02K 9/08 B (58) Fields investigated (Int.Cl. 7 , DB name) H02K 1/32 H02K 1 / 27 501 H02K 9/04 H02K 9/08
Claims (2)
個の永久磁石を埋設し、この界磁鉄心の両側面に配置す
ることにより前記界磁鉄心を固定する端板の外側面に複
数の翼片を備え、この翼片により外側にある電機子巻線
へ冷却空気の流れを生じさせる永久磁石付回転子におい
て、前 記界磁鉄心の永久磁石の両端に、この永久磁石の表面
に接して軸方向の通風路を配設し、 前記界磁鉄心の両端板の外周縁の内側面に、外周面側を
閉塞し軸心側を開口してなる吸入口を備えた凹溝と、軸
心側を閉塞し外周面側を開口してなる吐出口を備えた凹
所とを均等間隔で交互に配置し、一方の端板の前記凹溝
位置に対向して他方の端板の凹所を配置するとともに、 前記永久磁石の両端に形成される前記通風路を前記端板
の凹所、凹溝とに対向させて前記界磁鉄心の両側面に前
記両端板を固定することにより、前記界磁鉄心を前記両
端板で挟持し、前記両端板の内側面と前記界磁鉄心の外
側面の間に隙間を設けて冷却空気の流通路を形成してな
り、 前記永久磁石付回転子の回転に伴い冷却空気が前記凹溝
の吸入口から吸い込まれ、前記流通路と前記永久磁石の
両端に形成される前記通風路を通り、この凹溝に対向す
る反対側の前記端板凹所の吐出口から吐き出されるよう
にして前記界磁鉄心および前記永久磁石を冷却すること
を特徴とする 永久磁石付回転子の冷却構造。1. A plurality of permanent magnets are embedded in a field core formed by laminating field core pieces, and the permanent magnets are arranged on both side surfaces of the field core .
Comprising a plurality of wings on the outer surface of the end plate for securing the field iron bars by Rukoto, in a rotor with a permanent magnet to generate a flow of cooling air to the armature winding lying outside this wing, before at both ends of the permanent magnets of the serial field core, and disposed air passage in the axial direction in contact with the surface of the permanent magnet, the inner surface of the outer peripheral edge of the end plates of the field core, the outer peripheral surface
A groove provided with a suction port that is closed and opens on the axial center side;
Concave with a discharge port that closes the core side and opens the outer peripheral side
Places are alternately arranged at even intervals, and the concave groove on one end plate is
The recess of the other end plate is arranged so as to face the position, and the air passages formed at both ends of the permanent magnet are provided with the end plate.
To face the recesses and grooves of the field core on both sides.
By fixing both end plates, the field iron core
It is sandwiched between the end plates, and the inside surface of the both end plates and the outside of the field core are
There should be a gap between the sides to form a cooling air flow passage.
As the rotor with permanent magnet rotates, the cooling air is
Of the permanent magnet
Passes through the ventilation passages formed at both ends and faces this groove.
So that it is discharged from the discharge port of the end plate recess on the opposite side
To cool the field core and the permanent magnet
The cooling structure of the rotor with a permanent magnet.
に複数の仕切壁を設け、この仕切壁の高さを前記凹溝や
前記凹所の周囲突部と同じ高さにし、この端板を前記界
磁鉄心の両側より挟着したとき、この端板と接触する前
記界磁鉄心の外側面との間に、前記仕切壁と前記凹溝や
前記凹所の周囲突部によって仕切られる隙間を形成し、
前記永久磁石付回転子の回転に伴いこの隙間から冷却空
気が吐き出されることを特徴とする請求項１に記載の永
久磁石付回転子の冷却構造。2. Between the groove and the recess provided inside the end plate
A plurality of partition walls are installed in the
The same height as the surrounding projections of the recess, when the end plate is sandwiched from both sides of the field <br/> magnetic iron heart, prior to contact with the end plate
Between the outer surface of the serial field core, the groove Ya and the partition wall
Form a gap partitioned by the peripheral projection of the recess ,
Cooling structure of a rotor with a permanent magnet according to claim 1, wherein the cooling air from the gap with the rotation of the rotor with the permanent magnets is issued come ejection.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26904897A JP3465157B2 (en) | 1997-10-01 | 1997-10-01 | Cooling structure of rotor with permanent magnet |
| EP98307125A EP0909004B1 (en) | 1997-10-01 | 1998-09-04 | Rotor having permanent magnet and mechanism for cooling the same |
| DE69825386T DE69825386T2 (en) | 1997-10-01 | 1998-09-04 | Permanent magnet rotor and cooling device |
| AU87060/98A AU740620B2 (en) | 1997-10-01 | 1998-09-24 | Rotor having permanent magnet and mechanism for cooling the same |
| US09/164,370 US6234767B1 (en) | 1997-10-01 | 1998-10-01 | Rotor having permanent magnet and mechanism for cooling the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26904897A JP3465157B2 (en) | 1997-10-01 | 1997-10-01 | Cooling structure of rotor with permanent magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11113202A JPH11113202A (en) | 1999-04-23 |
| JP3465157B2 true JP3465157B2 (en) | 2003-11-10 |
Family
ID=17466958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26904897A Expired - Fee Related JP3465157B2 (en) | 1997-10-01 | 1997-10-01 | Cooling structure of rotor with permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3465157B2 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4356232B2 (en) * | 2000-11-22 | 2009-11-04 | 株式会社デンソー | Rotor center of gravity eccentric type motor |
| DE502005005887D1 (en) * | 2005-05-10 | 2008-12-18 | Siemens Ag | Electric machine |
| US7705503B2 (en) | 2005-09-07 | 2010-04-27 | Kabushiki Kaisha Toshiba | Rotating electrical machine |
| JP4920359B2 (en) * | 2006-09-28 | 2012-04-18 | 本田技研工業株式会社 | Electric motor |
| JP4757238B2 (en) * | 2007-07-13 | 2011-08-24 | アイシン・エィ・ダブリュ株式会社 | Cooling structure and cooling method for rotating electrical machine |
| JP2009027836A (en) * | 2007-07-19 | 2009-02-05 | Toyota Motor Corp | Rotary electric machine |
| JP4424385B2 (en) * | 2007-07-20 | 2010-03-03 | トヨタ自動車株式会社 | Rotating electric machine |
| JP4363479B2 (en) * | 2007-11-09 | 2009-11-11 | トヨタ自動車株式会社 | Rotating electric machine and driving device |
| JP5334529B2 (en) * | 2008-10-30 | 2013-11-06 | 株式会社日立産機システム | Permanent magnet motor |
| JP5710886B2 (en) * | 2010-03-15 | 2015-04-30 | 株式会社日本自動車部品総合研究所 | Rotating electric machine |
| JP5460926B2 (en) * | 2010-06-30 | 2014-04-02 | エー ビー ビー リサーチ リミテッド | Synchronous reluctance machine using rotor flux barrier as cooling channel |
| KR101270836B1 (en) * | 2011-12-08 | 2013-06-05 | 엘지이노텍 주식회사 | Rotor core and motor having the same |
| JP6255566B2 (en) * | 2013-06-12 | 2018-01-10 | パナソニックＩｐマネジメント株式会社 | Electric motors and electrical equipment |
| JP6190677B2 (en) | 2013-09-20 | 2017-08-30 | 本田技研工業株式会社 | Rotating electrical machine rotor |
| JP6175022B2 (en) * | 2014-05-14 | 2017-08-02 | 本田技研工業株式会社 | Rotating electrical machine rotor |
| JP6965101B2 (en) * | 2017-10-26 | 2021-11-10 | 株式会社日立インダストリアルプロダクツ | Rotating electric machine and motor vehicle equipped with it |
| WO2022225324A1 (en) * | 2021-04-23 | 2022-10-27 | 주식회사 아모텍 | Rotor, and propeller driving device and aircraft using same |
-
1997
- 1997-10-01 JP JP26904897A patent/JP3465157B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11113202A (en) | 1999-04-23 |
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