JPS631827B2 - - Google Patents
Info
- Publication number
- JPS631827B2 JPS631827B2 JP55123464A JP12346480A JPS631827B2 JP S631827 B2 JPS631827 B2 JP S631827B2 JP 55123464 A JP55123464 A JP 55123464A JP 12346480 A JP12346480 A JP 12346480A JP S631827 B2 JPS631827 B2 JP S631827B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- coil
- prevention device
- current
- motor
- 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
Links
- 238000004804 winding Methods 0.000 claims description 24
- 230000002265 prevention Effects 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Thermally Actuated Switches (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は電動機など電気機器の温度過昇防止装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an overtemperature rise prevention device for electrical equipment such as electric motors.
（従来の目的）
電気機器において、例えば電動機の固定子巻線
（マグネツト・ワイヤーで形成）を焼損すること
は直ちに製造装置の停止につながり、大きな被害
をもたらすことになる。従つて、従来からその機
器に要求される機能、用途、取付場所、重要度に
より保護装置は種々選定されている。例えば電動
機関係で主に用いられている温度保護装置として
は、一般的にバイメタル式の熱動形のものがあ
る。これは、バイメタルに直接又は間接的に電流
を流し、バイメタルの内部にジユール熱を生じバ
イメタルを反転させるものと、周囲の温度が設定
値以上になつたとき同様にバイメタルを反転させ
るものがある。この反転により接点を開き、回路
を遮断して電動機を停止させ、固定子巻線を保護
する温度保護装置が使用されている。前者の電流
要素若しくは電流要素と温度の影響によつて動作
するもので、構造上大形となり、内部スペースの
非常に小さい小形電動機に取付けることができな
いことと、高価になるという欠点がある。また後
者の場合は、一般に小さいものがあるから寸法的
には取付が可能であるが、電動機の拘束時に電流
要素によつて早く動作して欲しい時には感度が悪
いという欠点があつた。(Conventional Objective) In electrical equipment, for example, burning out the stator winding (formed by magnet wire) of a motor immediately leads to the shutdown of the manufacturing equipment and causes great damage. Therefore, various protective devices have been selected depending on the functions, uses, installation locations, and importance required for the equipment. For example, as a temperature protection device mainly used in connection with electric motors, there is generally a bimetal type thermal protection device. There are two types of electric current that flow directly or indirectly through the bimetal, generating Joule heat inside the bimetal and inverting the bimetal, and another inverting the bimetal in the same way when the ambient temperature exceeds a set value. A temperature protection device is used that opens the contacts upon this reversal, interrupting the circuit and stopping the motor to protect the stator windings. The former operates by the influence of current elements or current elements and temperature, and has the disadvantages of being large in structure, not being able to be attached to a small electric motor with a very small internal space, and being expensive. In the latter case, since they are generally small, it is possible to install them in terms of dimensions, but they have the disadvantage of poor sensitivity when the motor is restricted and the current element is desired to operate quickly.
本発明の目的はこれらの事情の鑑みなされたも
ので、電動機の拘束、単相運転、過負荷、不平衡
電源等の温度過昇条件を早くキヤツチし、固定子
巻線の焼損を防止する温度過昇防止装置を提供す
ることにある。 The purpose of the present invention was made in view of these circumstances, and the purpose of the present invention is to quickly catch excessive temperature rise conditions such as motor restriction, single-phase operation, overload, unbalanced power supply, etc., and to prevent burnout of stator windings. An object of the present invention is to provide an overheating prevention device.
（問題点を解決するための手段）
本発明は電気機器の巻線の近傍に配設して電気
機器の温度と流れる電流を検知して温度過上昇を
防止するものにおいて、電線を巻回してなる円筒
状のコイルと、このコイルの内側に空間を設けて
収納した熱動形温度保護装置と、前記空間に熱伝
達にすぐれ且つ高透磁率を有する材料と混合する
樹脂で成る充填材を充填して形成されたことを特
徴とする温度過昇防止装置である。
(Means for Solving the Problems) The present invention is arranged near the windings of electrical equipment to detect the temperature and flowing current of the electrical equipment to prevent excessive temperature rise. A cylindrical coil, a thermal temperature protection device housed in a space inside the coil, and a filler made of a resin mixed with a material having excellent heat transfer and high magnetic permeability in the space. This is a temperature overrise prevention device characterized by being formed as follows.
（作用）
この様に構成されているので、コイルに流れる
電流による磁界で鉄粉に鉄損が生じこれが充填材
全体の発熱を大にさせ、充填材内に埋設された熱
動形温度保護装置であるバイメタルが充填材の温
度上昇を従来より低温で検知して動作し、電気機
器の巻線の損傷を少なく且つ焼損を防止する。(Function) With this structure, the magnetic field caused by the current flowing through the coil causes iron loss in the iron powder, which increases the heat generation of the entire filling material, and a thermal temperature protection device embedded in the filling material. The bimetal detects the temperature rise of the filler at a lower temperature than before and operates, reducing damage to the windings of electrical equipment and preventing burnout.
（実施例）
以下図面を参照して本発明の一実施例を説明す
る。第１図は本装置の縦断正面図で、この温度過
昇防止装置１は次の様にして形成される。即ち、
電線（マグネツト・ワイヤー）を複数回円筒状に
巻かれて形成された円筒状のコイル２と、このコ
イル２の内側にバイメタル式の温度保護装置３が
挿入されており、温度保護装置３のリード線端子
は一方４ａを直接外部へ他方４ｂをコイル２の巻
線を経由して外部へ夫々取り出されている。コイ
ル２と温度保護装置３の空間部には、エポキシレ
ジンと鉄粉を適当に混合したものを充填材５とし
て充填固着し、円筒状のコイル２の外周には絶縁
チユーブ６によつて全体をつつむ構成からなつて
いる。(Example) An example of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional front view of this device, and this overtemperature rise prevention device 1 is formed as follows. That is,
A cylindrical coil 2 is formed by winding an electric wire (magnet wire) into a cylindrical shape multiple times, and a bimetallic temperature protection device 3 is inserted inside this coil 2. One wire terminal 4a is taken out directly to the outside, and the other wire terminal 4b is taken out to the outside via the winding of the coil 2, respectively. A suitable mixture of epoxy resin and iron powder is filled and fixed in the space between the coil 2 and the temperature protection device 3 as a filler 5, and an insulating tube 6 is provided around the outer periphery of the cylindrical coil 2. It consists of a wrapping structure.
以上のように構成された温度過昇防止装置１
は、第２図の結線図に示すように固定子巻線７と
温度保護装置３のリード線端子を直列接続し、温
度過昇防止装置１は固定子巻線７の近傍に取付け
らる。そして、電動機の端子８が電源に接続され
て通電されると、温度過昇防止装置１を通じて、
固定子巻線７に電流が供給される。誘導電動機が
始動する時には、定格運転電流の数倍の始動電流
が流れる。始動電流の持続時間は負荷により変動
するが、小形電動機では一般に長くても数秒以内
に始動は完了するために、電動機及び負荷が正常
の場合には温度過昇防止装置１は何ら動作しな
い。しかし乍ら電動機又は負荷の相手機械が何ら
かの原因によつて回転軸が拘束されたような場合
には、電動機に拘束電流のみが流れる。この時、
温度過昇防止装置１のコイル２に流れる電流によ
つて、コイル２が円筒状であるためにコイル２の
内部には電流に比例した磁界が生じる。このこと
を第３図により説明すると、円筒状のコイル２の
巻き長さｌ、巻回数Ｎ、円筒状のコイル２の半径
ａ、内部のレジンと鉄粉の混合における透磁率を
μとすると、コイル２の内部中心磁界Ｈと磁気エ
ネルギーｕは次の(1)及び(2)式で表される。 Overtemperature rise prevention device 1 configured as above
As shown in the connection diagram of FIG. 2, the stator winding 7 and the lead wire terminal of the temperature protection device 3 are connected in series, and the overtemperature rise prevention device 1 is installed near the stator winding 7. Then, when the terminal 8 of the motor is connected to the power source and energized, the temperature rise prevention device 1 causes the
A current is supplied to the stator winding 7. When an induction motor starts, a starting current several times the rated operating current flows. Although the duration of the starting current varies depending on the load, in general, starting of a small electric motor is completed within a few seconds at most, so if the electric motor and the load are normal, the overtemperature rise prevention device 1 does not operate at all. However, if the rotating shaft of the electric motor or a load-bearing machine is restricted for some reason, only the restricted current flows through the electric motor. At this time,
Due to the current flowing through the coil 2 of the overtemperature rise prevention device 1 , a magnetic field proportional to the current is generated inside the coil 2 because the coil 2 is cylindrical. To explain this with reference to FIG. 3, if the winding length l of the cylindrical coil 2, the number of turns N, the radius a of the cylindrical coil 2, and the magnetic permeability of the mixture of resin and iron powder inside is μ, then The internal central magnetic field H and magnetic energy u of the coil 2 are expressed by the following equations (1) and (2).
ｕ＝μN2I2／８｛a2（ｌ／２）2｝ …(2)
Ｎ：巻回数
Ｉ：電流
μ：透磁率
ｕ：磁気エネルギー
即ち、コイル２の内部のレジンと鉄粉混合の充
填材５には磁界がかかるために、鉄粉に鉄損を生
じ発熱する。この時の磁気エネルギーｕは電流Ｉ
の２乗に比例し、この大きさに比例して鉄粉が発
熱し、ひいては熱伝達によつて充填材５全体が発
熱する。この充填材５の温度を充填材５内に埋設
された温度保護装置３が検出する。 u=μN 2 I 2 /8 {a 2 (l/2) 2 } ...(2) N: Number of turns I: Current μ: Magnetic permeability u: Magnetic energy In other words, the amount of the resin and iron powder mixture inside the coil 2 Since a magnetic field is applied to the filler 5, core loss occurs in the iron powder and heat is generated. At this time, the magnetic energy u is the current I
The iron powder generates heat in proportion to the square of this size, and as a result, the entire filling material 5 generates heat due to heat transfer. A temperature protection device 3 embedded within the filling material 5 detects the temperature of the filling material 5.
今、電動機が何らかの原因によつて拘束され、
電動機の拘束電流が定格運転電流の６倍であつた
とすれば、この拘束電流によつて発生する磁界に
より温度過昇防止装置１を形成する充填材５の鉄
粉は鉄損を発生し、その熱量は定格運転時の36倍
となり、鉄粉と混合されるレジンの熱伝導率を考
慮に入れても充填材５の温度上昇は高く且つ速
い。この発熱によつて上昇した充填材５の温度を
温度保護装置３のバイメタルは短時間に感温し接
点を開く。従つて電動機に流れる電流は遮断さ
れ、固定子巻線７の温度が過昇したり焼損するこ
とはない。これは従来の単にバイメタルを固定子
巻線７に接触させる方式に比べ、バイメタルは発
熱体の充填材５により包囲され且つ高温であるた
めバイメタル表面での熱放散が少なくバイメタル
の感温は高温で且つ速度が速くなるので、電動機
の拘束時に従来より低温で電動機の電流を遮断す
ることができ固定子巻線７の損傷をより少なくす
ることができる。 Now, the electric motor is restricted for some reason,
If the restraint current of the motor is six times the rated operating current, the iron powder of the filler material 5 forming the overtemperature rise prevention device 1 will generate iron loss due to the magnetic field generated by this restraint current. The amount of heat is 36 times that of the rated operation, and even taking into account the thermal conductivity of the resin mixed with the iron powder, the temperature rise of the filler 5 is high and rapid. The bimetal of the temperature protection device 3 senses the temperature of the filler 5, which has increased due to this heat generation, in a short time and opens the contact. Therefore, the current flowing to the motor is cut off, and the temperature of the stator winding 7 does not rise excessively or burn out. Compared to the conventional method of simply bringing the bimetal into contact with the stator winding 7, the bimetal is surrounded by the heating element filler 5 and has a high temperature, so there is less heat dissipation on the bimetal surface, and the bimetal's temperature sensitivity is higher. In addition, since the speed is increased, the current of the motor can be cut off at a lower temperature than before when the motor is locked, and damage to the stator winding 7 can be further reduced.
また、第２図において固定子巻線７の一相が切
れていたり、電源の一端が接触不良等によつて欠
相していたりした場合、電動機は単相運転される
が、この場合も電動機は単相状態では始動しない
ので単相拘束状態となり、温度過昇防止装置１に
よつて固定子巻線７に流れる電流は遮断され固定
子巻線７は保護される。一方運転中に過負荷或い
は単相運転になり、固定子巻線７の温度上昇が高
くなつた時には、温度過昇防止装置１は予め固定
子巻線７の近傍に取付けられているので巻線の温
度上昇を検知して、温度保護装置３の接点を開放
し電動機は停止し、固定子巻線７の焼損を防止す
る。 In addition, in Fig. 2, if one phase of the stator winding 7 is disconnected or if one end of the power supply has an open phase due to poor contact, etc., the motor will operate in a single phase. Since the motor will not start in a single-phase state, it will be in a single-phase locked state, and the overtemperature rise prevention device 1 will cut off the current flowing to the stator winding 7 and protect the stator winding 7. On the other hand, if an overload or single-phase operation occurs during operation, and the temperature rise of the stator winding 7 becomes high, the overtemperature rise prevention device 1 is installed in advance near the stator winding 7, so the winding Detecting the temperature rise, the contact of the temperature protection device 3 is opened to stop the motor and prevent the stator winding 7 from burning out.
尚、この温度過昇防止装置１は当然のことなが
ら、電動機が正常始動並びに正常運転（電動機の
定格電流以下で運転）される場合には動作しない
ように、温度保護装置３、コイル２の巻回数など
を設定しておく。 It should be noted that the temperature protection device 1 and the winding of the coil 2 are of course designed to prevent the overheating prevention device 1 from operating when the motor is normally started and operated (operated below the rated current of the motor). Set the number of times, etc.
上記一実施例においていは、コイル２の内部に
レジンと鉄粉を混合した充填材５を挿入したが、
要は、コイル２の内部に出来る磁界Ｈによつて温
度保護装置３の温度が上昇すればよいので、鉄粉
の代わりに空気より透磁率の大きい材料を挿入す
るとか、温度保護装置３の本体、外装などに磁性
材を使用するなど上記実施例にのみ限定されず、
その要旨を変更しない範囲内で種々変形して実施
出来ることは勿論である。 In the above embodiment, a filler 5 made of a mixture of resin and iron powder was inserted inside the coil 2.
The point is that the temperature of the temperature protection device 3 should rise due to the magnetic field H created inside the coil 2, so it is possible to insert a material with higher magnetic permeability than air instead of iron powder, or to increase the temperature of the temperature protection device 3. , but is not limited to the above examples, such as using magnetic materials for the exterior etc.
Of course, various modifications can be made without changing the gist of the invention.
このように本発明によれば、円筒状のコイル内
の鉄粉とレジンを混合した充填材で温度保護装置
を埋設したことにより、従来の温度保護装置のみ
ではカバーすることの出来なかつた範囲、即ち、
電動機の拘束時の温度保護機能を持たせることが
出来、電気機器の熱特性に合致した保護ができる
効果がある。
As described above, according to the present invention, by embedding the temperature protection device in the cylindrical coil with a filling material made of a mixture of iron powder and resin, the temperature protection device can cover an area that could not be covered by conventional temperature protection devices alone. That is,
It is possible to provide a temperature protection function when the electric motor is restricted, and has the effect of providing protection that matches the thermal characteristics of the electric equipment.
第１図は本発明による温度過昇防止装置の縦断
正面図、第２図は温度過昇防止装置を電動機に組
込んだ時の結線図、第３図は温度過昇防止装置の
原理を説明する構成図である。
１……温度過昇防止装置、２……コイル、３…
…温度保護装置、４ａ，４ｂ……リード線、５…
…充填材、６……絶縁チユーブ、７……固定子巻
線。
Fig. 1 is a longitudinal sectional front view of the overtemperature rise prevention device according to the present invention, Fig. 2 is a wiring diagram when the overtemperature rise prevention device is incorporated into an electric motor, and Fig. 3 explains the principle of the overtemperature rise prevention device. FIG. 1 ...Temperature rise prevention device, 2...Coil, 3...
...Temperature protection device, 4a, 4b...Lead wire, 5...
...Filling material, 6...Insulating tube, 7...Stator winding.
Claims (1)
温度と流れる電流を検知して温度過上昇を防止す
るものにおいて、電線を巻回してなる円筒状のコ
イルと、このコイルの内側に空間を設けて収納し
た熱動形温度保護装置と、前記空間に熱伝達にす
ぐれ且つ高透磁率を有する材料と混合する樹脂で
成る充填材を充填して形成されたことを特徴とす
る温度過昇防止装置。 ２ 前記充填材を鉄粉とエポキシレジンを混合し
たこととする特許請求の範囲第１項記載の温度過
昇防止装置。[Scope of Claims] 1. A device that is placed near the windings of an electrical device to detect the temperature and flowing current of the electrical device to prevent an excessive rise in temperature. , a thermal type temperature protection device housed in a space provided inside the coil, and the space filled with a filler made of a resin mixed with a material having excellent heat transfer and high magnetic permeability. An overtemperature rise prevention device featuring: 2. The overtemperature rise prevention device according to claim 1, wherein the filler is a mixture of iron powder and epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55123464A JPS5749346A (en) | 1980-09-08 | 1980-09-08 | Protecting device for over-rising of temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55123464A JPS5749346A (en) | 1980-09-08 | 1980-09-08 | Protecting device for over-rising of temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5749346A JPS5749346A (en) | 1982-03-23 |
| JPS631827B2 true JPS631827B2 (en) | 1988-01-14 |
Family
ID=14861270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55123464A Granted JPS5749346A (en) | 1980-09-08 | 1980-09-08 | Protecting device for over-rising of temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5749346A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3332533A1 (en) * | 1983-09-09 | 1985-03-28 | Layh Hans Dieter | AC ALTERNATOR |
| JPS61184646U (en) * | 1985-05-08 | 1986-11-18 | ||
| JPS6335556U (en) * | 1986-08-26 | 1988-03-07 | ||
| JPH0627046U (en) * | 1992-09-10 | 1994-04-12 | 株式会社日研工作所 | Fluid supply device for tools |
| US6822354B2 (en) * | 2003-04-04 | 2004-11-23 | Robert Bosch Corporation | Electric motor |
| FR2935562A1 (en) * | 2008-09-03 | 2010-03-05 | Michelin Soc Tech | Synchronous rotary electrical machine for on-board traction application of electric motor vehicle, has measuring sensor including sensitive head that is mounted nearer to junction of non-isolated conductive ends at common star point |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5174203A (en) * | 1974-12-23 | 1976-06-28 | Matsushita Electric Ind Co Ltd |
-
1980
- 1980-09-08 JP JP55123464A patent/JPS5749346A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5174203A (en) * | 1974-12-23 | 1976-06-28 | Matsushita Electric Ind Co Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5749346A (en) | 1982-03-23 |
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