JPS5989538A - Salient-pole lumped pole rotor - Google Patents

Abstract

PURPOSE:To reduce the thermal loss of the head of a pole of a rotor at the starting time by forming slits of different size in an inverted trapezoidal shape at both axial ends of the heads of the poles in different number at the advancing rotating side and delaying rotating side of the poles. CONSTITUTION:A salient-pole type lumped pole 10 is formed by dividing into a body 11 and a head 12 in a structure integrally associated by clamping both 11, 12 with bolts 13, and rotor windings 14 of field winding are wound on both. Slits 17a, 17b which extends the heat sink area are formed at the head 12. The number of slits 17a at the advancing rotating side F1 is increased more than that of slits 17b at the delaying rotating side F2. Further, the slits 17a3, 17a2 of both sides are increased in number more than slits 17a1 at the center. The slits 17a, 17b are formed in shape that the surface of the head 12 is widest and the head becomes gradualy narrower toward the depthwise direction in an inverted trapezoidal shape.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は電動機の起動時Ｉ”−おける熱変形の少ない、
熱容量の大きな改良した突極形塊状磁極回転子４二関す
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides an electric motor with less thermal deformation during startup.
The present invention relates to an improved salient pole type block magnetic pole rotor 42 with a large heat capacity.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

突極形塊状磁極回転子を備えた同期電動機は、磁極頭部
の熱容量が大きいことから重負荷起動を行なう自己始動
方式の゛電動機として広く用いられている。突極形塊状
磁極は胴部と頭部とを一つの母材から一体（＝製作し、
これに界磁巻線の回転子巻線を巻装する構造のものと、
胴部と頭部とを分割して製作し、両者をボルトで締めつ
けて一体に組み立てる構造のものとがある。A synchronous motor equipped with a salient pole-shaped block magnetic pole rotor is widely used as a self-starting type electric motor that performs heavy load starting because the heat capacity of the magnetic pole head is large. The salient pole-shaped block magnetic pole is made by integrally manufacturing the body and the head from one base material.
A structure in which the rotor winding of the field winding is wound around this,
There is a structure in which the torso and the head are manufactured separately and then assembled together by tightening bolts.

いずれの突極形塊状磁極を用いた同期電動機は、起動時
（＝磁極頭部（＝流れるうず電流によるトルクを利用し
て起動を行なうことから、その磁極頭部（−多くの熱損
失を発生する。起動時の熱損失は、回転子の回転方向（
二対して回転進み側に、また軸方向（二対しては両端部
４二集中する傾向があることを確認されている。したが
って、回転進み側の磁極頭部の熱変形４二より回転子巻
線およびこの回転子巻線と磁極との間に介挿した絶縁物
（＝損、儒□又は絶縁劣化を起させる。この起動時の熱
ｙ量を増加させ、回転子巻線および絶縁物（二対する熱
影響を少なくさせるシニは、磁極頭部を大きくする必要
があり、これは回転電機全体が大形化すること（二つな
がる。Synchronous motors using any of the salient pole-shaped block magnetic poles generate a large amount of heat loss at the time of starting (= magnetic pole head). The heat loss during startup is determined by the rotation direction of the rotor (
It has been confirmed that there is a tendency for the rotor winding to concentrate on the rotation advancing side of the two, and in the axial direction (both ends 42 of the two). The wires and the insulators inserted between the rotor windings and the magnetic poles (= loss, □ or insulation deterioration are caused.The amount of heat y during startup is increased, and the rotor windings and the insulators ( In order to reduce the thermal influence on the two, it is necessary to make the magnetic pole head larger, which means that the entire rotating electric machine becomes larger (which leads to two problems).

〔発明の目的〕[Purpose of the invention]

本発明の目的は、起動時（−おける磁極頭部の熱損失を
他力小さくし、併せて磁極頭部の熱変形（二よって回転
子巻線およびその周わシの絶縁物に損傷又は絶縁劣化を
与えることを防止できる突極形塊状磁極回転子を提供す
る（二ある。The purpose of the present invention is to reduce the heat loss of the magnetic pole head during startup (-), and also to reduce the thermal deformation of the magnetic pole head (2), thereby preventing damage to the rotor windings and the insulation around them. To provide a salient pole-shaped block magnetic pole rotor that can prevent deterioration (there are two types).

〔発明の概要〕[Summary of the invention]

本発明は磁極頭部の回転進み側と遅れ側とＣ二、又磁＆
頭部の軸方向両端（二それぞれスリットを設け、このス
リットは回転進み側のものが放熱面積および熱変形吸収
が多くなるよう（二形成したこと（二よシ、起動時Ｃ二
おけるｉ極頭部の熱損失の発生臀極力小さくなるように
構成したことを特徴とする突極形塊状磁極回転子（二関
するものである。The present invention is characterized by the rotation leading side and lagging side of the magnetic pole head, C2, and magnetic &
A slit is provided at both ends of the head in the axial direction (two slits are provided at each end, and the slit is formed so that the one on the rotation advancing side has a larger heat dissipation area and thermal deformation absorption (two). A salient-pole type block magnetic pole rotor (2) characterized in that it is constructed to minimize the occurrence of heat loss in the parts.

′　　□　。′　□　.

〔発明の実施例〕[Embodiments of the invention]

以下本発明を図面に示す実施例について説明する。第１
図、第２図および第３図シニおいて、不発明による突極
形塊状磁極１０は、胴部１１と頭ｓ１２とを分割して製
作し、この両者１１．１２をボルト１３で締めつけて一
体（二組み立てた構造を採用し、これＣ二界磁巻線の回
転子巻線１４を巻装している。この突極塊状磁極１０を
極数に応じた個数だけ回転電機の回転軸１５に装涜して
突極形塊状磁極回転子１６を構成する。勿論、胴部１１
と頭部１２とを一つの母材から一体Ｃ′−製作した磁極
１０の場合でも同様な構造になる。The present invention will be described below with reference to embodiments shown in the drawings. 1st
2 and 3, the salient pole-shaped block magnetic pole 10 according to the invention is manufactured by dividing the body portion 11 and the head s12, and tightens both 11 and 12 with bolts 13 to integrate them. (A two-assembled structure is adopted, and the rotor winding 14 of the C double field winding is wound around the rotor winding 14. A number of these salient block magnetic poles 10 are attached to the rotating shaft 15 of the rotating electrical machine in a number corresponding to the number of poles. This constitutes a salient pole-shaped block magnetic pole rotor 16. Of course, the body 11
A similar structure is obtained even in the case of a magnetic pole 10 in which the head 12 and the head 12 are integrally manufactured from one base material.

この突極形塊状磁極回転子１６を使用した同期電動機に
おいては、その始動時（二磁極１０の頭部１２（ユうず
電流による熱損失が発生する。不発明シ；おいては、こ
の熱損失を極力小さくするために、磁極頭部１２（＝放
熱面積を広けるスリン）　１７ａ　、　１７ｂを設けて
いる。しかして、磁極頭部１２（＝流れるうず電流ζ二
よって発生する熱損失は、回転子１６の回転進み側の矢
示Ｆ１が回転遅れ側の矢示Ｆ、　４二比して大であるこ
とから、そのスリットの数は回転進み側Ｆ工のスリット
１７＆を回転遅れ側Ｆ２のスリット１７ｂ　よシ多くし
ている。また回転子１６の軸方向（二見た場合、始動時
のうず電流（：よシ発生する熱損失は、磁極頭部１２０
両端部付近（＝集中して発生するので、両端側のスリン
Ｆ　１７ａｓ　ｌ　１７ａｍを中央部のスリット１７ａ
−ニルべて多くした！ｌｌ数を多くして発生熱を吸収す
るよう４二考慮している。In a synchronous motor using this salient pole-shaped block magnetic pole rotor 16, heat loss occurs due to eddy current at the time of starting (the head 12 of the two magnetic poles 10). In order to make the magnetic pole head 12 as small as possible, the magnetic pole head 12 (=Surins that widen the heat dissipation area) 17a and 17b are provided. Since the arrow F1 on the rotation leading side of the child 16 is larger than the arrow F, 42 on the rotation lag side, the number of slits is larger than the slit 17& on the rotation leading side F and the slit F2 on the rotation lag side. 17b. Also, the heat loss generated in the axial direction of the rotor 16 (or eddy current at the time of starting) is
Near both ends (= Since it occurs concentratedly, the slit F 17as l 17am on both ends is connected to the slit 17a in the center.
-I made a lot of things! The number of liters is increased to absorb the generated heat.

またスリット１７ａ　、　１７ｂの深さおよび形状を第
３図（一ついて説明する。スリット、　１７ａ　＋　１
７ｂの深さは、始動時の熱損失の発生層が磁極頭部１２
０表面よシ約４〜５　ｍ＋ｎの深さを想定されるので、
その寸法ζ：なるよう区二設ける。スリット１７ａ　、
　１７ｂの形状は、電動機の始動が進む４；つれて磁極
頭部１２０表面部（二集中していた磁束が深く浸透する
ことにより、熱損失の発生層が磁極表面部よυ次第（二
深くなシ、熱伝導が進んでいくととから、第３図（二示
すよう（＝磁極頭部１２０表面が最も広く、深さ方向（
ニしたかって次第１＝狭くなる逆台形の形にしである。In addition, the depth and shape of the slits 17a and 17b are shown in FIG.
The depth of 7b is such that the layer where heat loss occurs during startup is the magnetic pole head 12.
Since the depth is assumed to be approximately 4 to 5 m+n from the surface,
The size is ζ: 2. slit 17a,
The shape of 17b is such that as the motor starts 4; as the magnetic flux that was concentrated at the surface of the magnetic pole head 120 (2) penetrates deeply, the heat loss generation layer becomes deeper than the surface of the magnetic pole (2). As heat conduction progresses, as shown in Figure 3 (2), the surface of the magnetic pole head 120 is the widest,
It is in the shape of an inverted trapezoid that becomes narrower as the number of points increases.

このよう（二本発明による突極形塊状磁極回転子１６に
おいては、始動時（＝磁極頭部１２（二それに流れるう
す電流（＝よって熱損失が発生する。しかしこの熱損失
の集中する磁極１０の回転進み側Ｆ１に設けた多くのス
リット１７ａの作用また軸方向の両端部（一般けられた
中心部より大きなスリットの効果６二より、熱変形は有
効に吸収されるとともに磁極頭部１２における極部的な
熱集中を避けることができる。第４図はスリットを設け
ない従来の構造砿二よる突惚形塊状磁憔回転子と本発明
のスリットを設けた突極形塊状磁極回転子の始動時（滑
、ｐ　＝　ｉ、ｏ　）（二おける損失分布を示している
。この第４図からも従来の回転子（：おける損失分布％
（−比し本発明の回転子における損失分布Ｗ、が均一化
されていることが認められる。In this way, in the salient pole block magnetic pole rotor 16 according to the present invention, at the time of starting (= magnetic pole head 12 (= thin current flowing through it), heat loss occurs. However, the magnetic pole 12 where this heat loss concentrates Due to the effect of the many slits 17a provided on the rotation advance side F1 and the effect of the slits at both ends in the axial direction (generally larger than the slit center), thermal deformation is effectively absorbed and It is possible to avoid localized heat concentration. Figure 4 shows a convex-shaped block magnetic rotor with a conventional structure without slits and a salient-pole block magnetic pole rotor with slits according to the present invention. It shows the loss distribution at startup (slip, p = i, o) (2). From this Figure 4, the loss distribution % at the conventional rotor (2) is shown.
(-In comparison, it is recognized that the loss distribution W in the rotor of the present invention is uniform.

また本発明のよう（：磁極頭部１２にスリン）　１７ａ
　＊１７ｂを設けることＣ＝よって磁極頭部１２０表面
積の増大を計ること（二な９、磁極頭部１２の冷却効果
の向上に相まって温就上昇を抑制することができ、磁極
頭部１２の表面温度分布が均一化することになる。Also, as in the present invention (: sulin on the magnetic pole head 12) 17a
*Providing 17b C=Therefore, increasing the surface area of the magnetic pole head 120 (Second 9) Coupled with the improvement of the cooling effect of the magnetic pole head 12, it is possible to suppress the increase in temperature, and the surface area of the magnetic pole head 12 This results in uniform temperature distribution.

このよう（二本発明（−おいては、磁極頭部１２の表面
損失の均一化、熱変形、熱吸収効果およびスリット（−
よる冷却効果の向上Ｃ二よシ、耐熱的な欠点を持つ回転
子巻線１４およびその周わシの絶縁物の損傷を防止する
ことができ、かつ損失分布が磁極頭部１２上で均一化す
ること（二よυ、従来のものよシも熱容量の大きな重負
荷を駆動するに適する同期電動機を構成することができ
る。In this way, the present invention (-) is characterized by equalization of the surface loss of the magnetic pole head 12, thermal deformation, heat absorption effect, and slit (-).
Second, it is possible to prevent damage to the rotor winding 14 and its surrounding insulation, which has heat resistance defects, and to make the loss distribution uniform on the magnetic pole head 12. (2) It is possible to construct a synchronous motor suitable for driving a heavy load with a large heat capacity compared to the conventional one.

なお、同期電動機の始動時（＝磁極頭部１２（二生じる
うす電流（二対する低減効果（二より始動トルクは低下
するが、始動過程の熱膨張によりスリットはせばまシ、
うす電流の通過面積が広がってトルクは次第（二増加す
る。一方磁極頭部１２０部材および始動方法（二よって
若干異なるが、磁極頭部１２に高張力鋼よりなる部材を
使用した本発明の突極形塊状磁極回転子１６を備えた同
期電動機を商用周波数（二おいて自己始動を行なう場合
、始動時の各すベシにおける磁束役透深さは、滑シー１
の場合は１．１ｍｍ程度であシ、滑シ＝０．５の場合は
１．６謂程度であり、滑ｆｉ　＝　０．０５の場合は５
朋程度である。このことから電動機の始動が進む（二し
たがい磁束浸透が深まっていき、また磁極頭ｓ１２の表
面部からの深さが深くなるにしたがい、うす電流の通路
が広くなるスリット１７ａ　、　１７ｂの効果（二より
トルクは増加する。In addition, when starting a synchronous motor (= magnetic pole head 12 (2), the thin current generated (2) has a reduction effect (2) The starting torque decreases, but due to thermal expansion during the starting process, the slit becomes narrower,
The area through which the thin current passes increases and the torque gradually increases.On the other hand, the magnetic pole head 120 and the starting method differ slightly depending on the magnetic pole head 120 and the starting method. When self-starting a synchronous motor equipped with a pole-shaped block magnetic pole rotor 16 at a commercial frequency (2), the magnetic flux penetration depth at each side during starting is equal to
In the case of , it is about 1.1 mm, in the case of sliding fi = 0.5, it is about 1.6 mm, and in the case of sliding fi = 0.05, it is 5
It's about my level. As a result, the starting of the electric motor progresses (as the magnetic flux penetration deepens, and as the depth from the surface of the magnetic pole head s12 increases, the effect of the slits 17a and 17b that the thin current path becomes wider (second). Torque increases.

第５図に示す他の実施例は、磁極頭部１２＋−スリン）
　１７ａ　、　１７ｂを千鳥状（二配設したもので、第
２図に示す実施側と同様の効果を得るととも）二、うず
電流の通路を均等化することからトルク特性を改善する
ことができる。Another embodiment shown in FIG.
17a and 17b are arranged in a staggered manner (two arrangements provide the same effect as the implementation side shown in Fig. 2).2. Torque characteristics can be improved by equalizing the path of eddy current. .

〔発明の効果〕〔Effect of the invention〕

以上のよう（−不発明によれば、磁極頭部の回転進み側
と回転遅れ側と（−異なる数の、また磁極頭部の軸方向
の両端１：大きさの異るスリットを逆台形状（＝設けた
ことによシ、始動時の熱損失による熱膨張を吸収し、か
つ磁極表面の温度分布を均一化し、併せて始動特性を改
善できる突極形塊状磁極回転子を得ることができる。As described above (-According to the invention, the rotation leading side and rotation lag side of the magnetic pole head and (-different numbers and both ends of the magnetic pole head in the axial direction 1: slits of different sizes are formed in an inverted trapezoid shape. (By providing this, it is possible to obtain a salient pole block magnetic pole rotor that absorbs thermal expansion due to heat loss during startup, equalizes the temperature distribution on the magnetic pole surface, and improves the starting characteristics.) .

【図面の簡単な説明】 第１図は本発明（二よる突極形塊状磁極回転子の一実施
例を示す斜視図、第２図はその突極形塊状磁極を示す平
面図、第３図は第２図のト１線（二そう防面図、第４図
は本発明と従来の磁極頭部の表面における損失分布を示
す曲線図、第５図は本発明の他の実施例を示す平面図で
ある。 １０・・・突他形塊状磁極、　１１・・・磁極の胴部１
２・・・磁極の頭部、　　　１３・・・ボルト１４・・
・回転子巻線、　　　１５・・・回転軸１６・・・突極
形塊状磁極回転子、１７・・・スリット（８７３３）　
　代理人　弁理士　猪　股　祥　晃（ほか１名）第１図 第２図 第４図 −１９２− 第５図[Brief Description of the Drawings] Fig. 1 is a perspective view showing an embodiment of the present invention (two salient pole type block magnetic pole rotors), Fig. 2 is a plan view showing the salient pole type block magnetic poles, and Fig. 3 is a curve diagram showing the loss distribution on the surface of the magnetic pole head of the present invention and the conventional magnetic pole head, and FIG. 5 is a curve diagram showing another embodiment of the present invention. FIG.
2... Head of magnetic pole, 13... Bolt 14...
・Rotor winding, 15... Rotating shaft 16... Salient pole type block magnetic pole rotor, 17... Slit (8733)
Agent Patent Attorney Yoshiaki Inomata (and 1 other person) Figure 1 Figure 2 Figure 4-192- Figure 5

Claims (4)

【特許請求の範囲】[Claims] （１）突極形塊状磁極を回転軸に装着し、その磁極頭部
の回転進み側と遅れ側とシー、進み側の方が大きくかつ
軸方向の両端部の方が大きくなるようなスリットをそれ
ぞれ設けたことを特徴とする突極形塊状磁極回転子。(1) A salient pole-shaped block magnetic pole is attached to a rotating shaft, and a slit is formed on the leading side, lagging side, and sea of the magnetic pole head so that the leading side is larger and the axial end portions are larger. A salient pole-shaped block magnetic pole rotor characterized in that each is provided with a salient pole shape. （２）　　スリットは磁極頭部の回転進み側の数が多く
、磁極頭部の軸方向の両端部が中央部より大きくしたこ
とを特徴とする特許請求の範囲第１項記載の突惚形塊状
磁極回転子。(2) The slits are in the shape of a convex block according to claim 1, characterized in that the number of the slits is larger on the rotating side of the magnetic pole head, and both ends of the magnetic pole head in the axial direction are larger than the central part. Magnetic pole rotor. （３）磁極頭部のスリットの形状は磁極頭部の深さ方向
（＝逆台形状であることを特徴とする特許請求の範囲第
１項記載の突極形塊状磁極回転子。(3) The salient pole block magnetic pole rotor according to claim 1, wherein the shape of the slit in the magnetic pole head is in the depth direction of the magnetic pole head (=inverted trapezoidal shape). （４）磁極頭部のスリットは、回転進み側と回転遅れ側
との間で千鳥状（二配設したことを特徴とする特許請求
の範囲第１項記載の突極形塊状磁極回転子。(4) The salient pole block magnetic pole rotor according to claim 1, wherein the slits in the magnetic pole heads are arranged in a staggered manner (two slits) between the rotation advance side and the rotation delay side.