JP2000311780A - Heating method - Google Patents
Heating methodInfo
- Publication number
- JP2000311780A JP2000311780A JP12189699A JP12189699A JP2000311780A JP 2000311780 A JP2000311780 A JP 2000311780A JP 12189699 A JP12189699 A JP 12189699A JP 12189699 A JP12189699 A JP 12189699A JP 2000311780 A JP2000311780 A JP 2000311780A
- Authority
- JP
- Japan
- Prior art keywords
- induction heating
- heating coil
- heat
- rotor
- work
- 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.)
- Pending
Links
Landscapes
- General Induction Heating (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電動機、変圧器な
ど電気機器電機巻線の製造、特にワニス含浸時において
好適な加熱方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing windings of electric machines such as electric motors and transformers, and particularly to a heating method suitable for impregnating varnish.
【０００２】[0002]
【従来の技術】回転電機の固定子又は回転子巻線、変圧
器の巻線などの電機巻線を、固着、絶縁、耐環境、劣化
防止などの目的で、真空又は常圧下で絶縁ワニス中に浸
漬したり滴下したりして、絶縁ワニス（以下、ワニスと
称す）を含浸し硬化する電機巻線の製造工程は、通常、
加熱硬化方法によることが多い。2. Description of the Related Art Electric motor windings such as stator or rotor windings of a rotating electric machine and windings of a transformer are placed in an insulating varnish under vacuum or normal pressure for the purpose of fixing, insulating, environmental resistance, and preventing deterioration. The process of manufacturing an electric winding that is immersed or dropped in an insulating varnish (hereinafter, referred to as varnish) and hardened is usually performed by:
Often by a heat-curing method.
【０００３】従来、このワニス加熱硬化方法としては、
（１）熱風加熱硬化法、（２）通電加熱硬化法、（３）
赤外線ランプ加熱硬化法、（４）誘導加熱硬化法などが
知られている。これら従来法の中で、（１）の熱風加熱
硬化法は、最もよく用いられている方法であるが、ワー
クの大きさに比例して加熱時間が増大するため、加熱硬
化時間が長くなるという問題があった。（２）の通電加
熱硬化法は、各コイルの巻線へ通電する必要があるた
め、各巻線へ電源リード線を接続する作業に多大な時間
が要するのと、リード線接続不良時に発生するスパーク
からワニスに引火する危険があった。（３）の赤外線ラ
ンプ加熱硬化法は、赤外線が照射されているところは良
く加熱されるが、照射されないスロット内部などはほと
んど加熱できないため、電機巻線のワニス加熱硬化法と
しては適用が難しい。（４）の誘導加熱法は、電動機の
回転子巻線の一部にしか実用化されておらず、これは小
型回転子巻線において、使用する円筒型誘導加熱コイル
の直径が、加熱対象物に合わないと、磁気回路の形成が
うまくできず、その結果充分な加熱ができないという問
題があったためである。Conventionally, this varnish heat curing method includes:
(1) Hot air heat curing method, (2) Electric heating curing method, (3)
Infrared lamp heating and curing methods, (4) induction heating and curing methods, and the like are known. Among these conventional methods, the hot-air heat-curing method (1) is the most frequently used method. However, since the heating time increases in proportion to the size of the work, the heat-curing time increases. There was a problem. In the energization heat hardening method of (2), since it is necessary to energize the windings of each coil, it takes a lot of time to connect a power supply lead wire to each winding, and a spark generated when lead wire connection failure occurs. There was a danger of the varnish catching fire. In the infrared lamp heat curing method (3), the portion irradiated with infrared rays is well heated, but the inside of the unirradiated slot is hardly heated. Therefore, it is difficult to apply the method as a varnish heat curing method for electric windings. The induction heating method (4) has been put to practical use only for a part of the rotor winding of an electric motor, and the diameter of a cylindrical induction heating coil used in a small rotor winding is limited to the object to be heated. If it does not, the magnetic circuit cannot be formed well, and as a result, sufficient heating cannot be performed.
【０００４】最近、製造効率を上げるために、ワニス処
理工程（特に加熱硬化工程）の短時間化が重要になって
きており、ワニスの硬化時間短縮化には、短時間硬化ワ
ニスの使用とともにワークの昇温時間短縮が必要となっ
ている。ワークの昇温時間短縮には、前述の４方法の中
では通電加熱法、誘導加熱法が有利と考えられるが、通
電加熱法は前記した通り問題点が多く、誘導加熱法は、
誘導加熱に使用される加熱コイルが円筒形であり、この
コイル内径とワーク外径の寸法をマッチングさせない
と、効率良く加熱できなかったため、ワーク寸法が変化
する場合には、単一の加熱コイルが使用できず、あるい
は、使用したとしても効率的に加熱できず、長時間の加
熱が必要となってしまう。Recently, it has become important to shorten the varnish treatment step (especially the heat curing step) in order to increase the production efficiency. It is necessary to shorten the heating time. In order to shorten the heating time of the work, the electric heating method and the induction heating method are considered to be advantageous among the above four methods. However, the electric heating method has many problems as described above, and the induction heating method has
The heating coil used for induction heating is cylindrical, and unless the dimensions of the coil inner diameter and the outer diameter of the work are matched, heating cannot be performed efficiently. It cannot be used, or cannot be efficiently heated even if used, and long-time heating is required.
【０００５】[0005]
【発明が解決しようとする課題】請求項１及び２記載の
発明は、小型でワークサイズが変化する場合でも、効率
的な誘導加熱が可能で、ワークの短時間加熱を行い、ワ
ニス加熱硬化時間を短縮化できる加熱方法を提供するも
のである。According to the first and second aspects of the present invention, efficient induction heating is possible even when the size of the work is small, the work is heated for a short time, and the varnish heat-curing time is shortened. Is provided.
【０００６】[0006]
【課題を解決するための手段】本発明は、誘導加熱コイ
ルの線材自身に強磁性体を含ませ、誘導加熱コイル自身
も発熱させることにより被加熱物を加熱することを特徴
とする加熱方法に関する。また、本発明は、加熱コイル
の線材としてニッケル覆銅導体耐熱電線を用いる請求項
１記載の加熱方法に関する。SUMMARY OF THE INVENTION The present invention relates to a heating method characterized in that an object to be heated is heated by including a ferromagnetic material in the wire itself of the induction heating coil and causing the induction heating coil itself to generate heat. . The present invention also relates to the heating method according to claim 1, wherein a nickel-coated copper conductor heat-resistant electric wire is used as a wire material of the heating coil.
【０００７】[0007]
【発明の実施の形態】本発明における加熱コイルの巻線
用線材に含ませる強磁性体としては、例えば、ニッケ
ル、コバルト、鉄等が挙げられる。これらの強磁性体を
含有させることにより安定的に磁気回路を形成させるこ
とができ、同時に、加熱コイル自身も発熱するので、そ
こで発生するジュール熱などによりワーク自身の加熱も
加速できる。使用する線材は耐熱性であることが必要で
あり、この線材として、銅線の周囲にニッケルを被覆し
た市販品のニッケル覆銅導体耐熱電線などが安定的に入
手できるので、これを使用することが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The ferromagnetic material contained in the wire for winding a heating coil in the present invention includes, for example, nickel, cobalt, iron and the like. By including these ferromagnetic substances, a magnetic circuit can be formed stably, and at the same time, the heating coil itself also generates heat, so that heating of the work itself can be accelerated by Joule heat generated there. The wire used must be heat-resistant, and a commercially available nickel-coated copper conductor heat-resistant wire with nickel coated around the copper wire can be obtained stably. Is preferred.
【０００８】このような強磁性体を含む線材を用いた誘
導加熱コイルでは、交流の電流が流れると、ワークと加
熱コイル線材の磁性材料により安定的に磁気の閉回路が
形成できるので、ワークサイズが変化しても、効率よく
ワークを加熱することができる。In such an induction heating coil using a wire containing a ferromagnetic material, when an alternating current flows, a magnetic closed circuit can be stably formed by the work and the magnetic material of the heating coil wire, so that the work size is reduced. Even if the temperature changes, the work can be efficiently heated.
【０００９】図１は、本発明の加熱方法を用いた回転電
機の回転子巻線を加熱する装置の主要部分の断面図であ
る。図１において、１は円筒形耐熱材料、２はワークで
ある回転電機の回転子、３は誘導加熱コイル、４は回転
子巻線のコイルエンド及び５は回転子鉄心である。FIG. 1 is a sectional view of a main part of an apparatus for heating a rotor winding of a rotating electric machine using the heating method of the present invention. In FIG. 1, 1 is a cylindrical heat-resistant material, 2 is a rotor of a rotating electric machine as a work, 3 is an induction heating coil, 4 is a coil end of a rotor winding, and 5 is a rotor core.
【００１０】[0010]
【実施例】以下、本発明を実施例により、図面を参照し
つつ説明するが、本発明はこれに限定されるものではな
い。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings by way of embodiments, but the present invention is not limited to these embodiments.
【００１１】実施例１ 内径φ５５mmの円筒形耐熱材料１の周囲に二宮電線(株)
製ニッケル覆銅導体耐熱電線（耐熱温度４００℃）を巻
き誘導加熱コイル３を作成した。この誘導加熱コイル３
に、図１のようにワーク２をセットした。ワーク２とし
ては、外径φ３４mm及びφ４２mmの回転子を用いた。こ
の状態で、加熱装置の誘導加熱コイル３に高周波電流を
流した。この時、高周波電流により交番磁界が発生し、
その電磁誘導作用によって電流が流れ、ジュール熱によ
って誘導加熱コイル３と回転子鉄心５が加熱された。こ
の時の経過時間と、測定したワーク２の表面温度の関係
を図２の（１）、（２）に示した。図２の（１）は外径
φ３４mmのワークで、表面温度は４０秒で１６０℃まで
上昇した。図２の（２）は外径φ４２mmのワークで、表
面温度は４０秒で２００℃まで上昇した。また、４０秒
後の誘導加熱コイル３表面温度は、外径φ３４mmでは１
５５℃、外径φ４２mmでは１９５℃であった。以上のよ
うに、ニッケル覆銅導体耐熱電線の誘導加熱コイルは、
ワーク表面温度を短時間で昇温することができた。Example 1 Ninomiya Electric Wire Co., Ltd. was placed around a cylindrical heat-resistant material 1 having an inner diameter of 55 mm.
A nickel-coated copper conductor heat-resistant electric wire (heat-resistant temperature of 400 ° C.) was wound to produce an induction heating coil 3. This induction heating coil 3
Then, the work 2 was set as shown in FIG. As the work 2, a rotor having an outer diameter of φ34 mm and a diameter of 42 mm was used. In this state, a high-frequency current was applied to the induction heating coil 3 of the heating device. At this time, an alternating magnetic field is generated by the high-frequency current,
A current flowed by the electromagnetic induction, and the induction heating coil 3 and the rotor core 5 were heated by Joule heat. The relationship between the elapsed time at this time and the measured surface temperature of the work 2 is shown in (1) and (2) of FIG. FIG. 2A shows a work having an outer diameter of φ34 mm, and the surface temperature rose to 160 ° C. in 40 seconds. FIG. 2B shows a workpiece having an outer diameter of 42 mm, and the surface temperature rose to 200 ° C. in 40 seconds. Also, the surface temperature of the induction heating coil 3 after 40 seconds is 1 at an outer diameter of φ34 mm.
The temperature was 195 ° C. at 55 ° C. and the outer diameter φ42 mm. As described above, the induction heating coil of the nickel-clad copper conductor heat-resistant wire is
The work surface temperature could be raised in a short time.
【００１２】比較例１ 実施例１と同一の内径φ５５mm円筒形耐熱材料１の周囲
に二宮電線(株)製エナメル線を巻き誘導加熱コイル３を
作成した。この誘導加熱コイル３に、図１のように外径
φ３４mmのワーク２をセットし、加熱装置の誘導加熱コ
イル３に高周波電流を流した。この時、高周波電流によ
り交番磁界が発生し、その電磁誘導作用によって、回転
電機回転子鉄心５に電流が流れ、このジュール熱によっ
て回転子鉄心５が加熱された。この時の経過時間と、測
定したワーク２の表面温度の関係を図２の（３）に示し
た。ワーク表面温度は、４０秒で８０℃までしか上昇し
なかった。また、４０秒後の誘導加熱コイル３表面温度
は５０℃とほとんど上昇しなかった。Comparative Example 1 An induction heating coil 3 was formed by winding an enameled wire made by Ninomiya Electric Wire Co., Ltd. around a cylindrical heat-resistant material 1 having an inner diameter of 55 mm which was the same as in Example 1. A work 2 having an outer diameter of φ34 mm was set in the induction heating coil 3 as shown in FIG. 1, and a high-frequency current was passed through the induction heating coil 3 of the heating device. At this time, an alternating magnetic field was generated by the high-frequency current, and a current flowed to the rotor core 5 of the rotating electric machine by the electromagnetic induction action, and the Joule heat heated the rotor core 5. The relationship between the elapsed time at this time and the measured surface temperature of the work 2 is shown in (3) of FIG. The workpiece surface temperature only increased to 80 ° C. in 40 seconds. Also, the surface temperature of the induction heating coil 3 after 40 seconds hardly increased to 50 ° C.
【００１３】以上より、実施例１による、ニッケル覆銅
導体耐熱電線の誘導加熱コイルは、自分自身が発熱し、
ワークを加熱するために非常に有効であることが分かっ
た。As described above, the induction heating coil of the nickel-coated copper conductor heat-resistant electric wire according to the first embodiment generates heat by itself.
It has been found to be very effective for heating the workpiece.
【００１４】[0014]
【発明の効果】請求項１及び２記載の加熱方法は、小型
でワークサイズが変化する場合でも、効率的な誘導加熱
が可能で、ワークの短時間加熱を行い、ワニス加熱硬化
時間を短縮化できる。According to the heating method according to the first and second aspects, even when the size is small and the size of the workpiece changes, efficient induction heating is possible, the workpiece is heated in a short time, and the varnish heat-curing time is shortened. it can.
【図１】本発明の加熱方法を用いた回転電機回転子巻線
加熱装置の部分断面図。FIG. 1 is a partial cross-sectional view of a rotating machine rotor winding heating device using a heating method of the present invention.
【図２】図１の装置用いた時のワーク表面温度の経時変
化を示すグラフ。FIG. 2 is a graph showing a change over time of a workpiece surface temperature when the apparatus of FIG. 1 is used.
１ ワークである回転電機の回転子 ２ 誘導加熱コイル ３ 回転子巻線のコイルエンド ４ 回転子鉄心 DESCRIPTION OF SYMBOLS 1 Rotor of rotary electric machine which is a work 2 Induction heating coil 3 Coil end of rotor winding 4 Rotor core
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辻 政明 茨城県日立本宮町五丁目11番１号 日立化 成テクノプラント株式会社内 (72)発明者 古田土 明夫 茨城県日立本宮町五丁目11番１号 日立化 成テクノプラント株式会社内 (72)発明者 稲葉 栄次 茨城県日立本宮町五丁目11番１号 日立化 成テクノプラント株式会社内 Ｆターム(参考） 3K059 AA08 AD40 CD44 CD63 CD64 5H615 AA01 BB01 PP02 PP06 PP14 SS24 SS46 TT04 TT14 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Tsuji 5-1-1, Hitachi-Honmiya-cho, Ibaraki Prefecture Inside Hitachi Chemical Techno Plant Co., Ltd. No. Hitachi Chemical Technoplant Co., Ltd. (72) Inventor Eiji Inaba 5-1-1, Hitachimotomiyacho, Ibaraki Prefecture F-term in Hitachi Chemical Technoplant Co., Ltd. 3K059 AA08 AD40 CD44 CD63 CD64 5H615 AA01 BB01 PP02 PP06 PP14 SS24 SS46 TT04 TT14
Claims (2)
含ませ、誘導加熱コイル自身も発熱させることにより被
加熱物を加熱することを特徴とする加熱方法。1. A heating method comprising heating an object to be heated by including a ferromagnetic material in a wire itself of an induction heating coil and causing the induction heating coil itself to generate heat.
体耐熱電線を用いる請求項１記載の加熱方法。2. The heating method according to claim 1, wherein a nickel-clad copper conductor heat-resistant electric wire is used as a wire of the heating coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12189699A JP2000311780A (en) | 1999-04-28 | 1999-04-28 | Heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12189699A JP2000311780A (en) | 1999-04-28 | 1999-04-28 | Heating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000311780A true JP2000311780A (en) | 2000-11-07 |
Family
ID=14822600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12189699A Pending JP2000311780A (en) | 1999-04-28 | 1999-04-28 | Heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000311780A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002335655A (en) * | 2001-05-11 | 2002-11-22 | Miyaden Co Ltd | Method and apparatus for manufacturing small-sized motor |
| CN101841216A (en) * | 2010-05-21 | 2010-09-22 | 哈尔滨东安发动机（集团）有限公司 | Heating method of motor rotor |
| JP2012005283A (en) * | 2010-06-18 | 2012-01-05 | Tokyo Electric Power Co Inc:The | Heating method and heater of stator by induction heating |
-
1999
- 1999-04-28 JP JP12189699A patent/JP2000311780A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002335655A (en) * | 2001-05-11 | 2002-11-22 | Miyaden Co Ltd | Method and apparatus for manufacturing small-sized motor |
| CN101841216A (en) * | 2010-05-21 | 2010-09-22 | 哈尔滨东安发动机（集团）有限公司 | Heating method of motor rotor |
| JP2012005283A (en) * | 2010-06-18 | 2012-01-05 | Tokyo Electric Power Co Inc:The | Heating method and heater of stator by induction heating |
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