JP2006203965A - Motor - Google Patents

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Publication number
JP2006203965A
JP2006203965A JP2005009885A JP2005009885A JP2006203965A JP 2006203965 A JP2006203965 A JP 2006203965A JP 2005009885 A JP2005009885 A JP 2005009885A JP 2005009885 A JP2005009885 A JP 2005009885A JP 2006203965 A JP2006203965 A JP 2006203965A
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Prior art keywords
thermal fuse
stator coil
temperature
terminal block
electric motor
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JP2005009885A
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JP4680609B2 (en
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Junji Okada
順二 岡田
Ryohei Ogawa
良平 小河
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2005009885A priority Critical patent/JP4680609B2/en
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Publication of JP4680609B2 publication Critical patent/JP4680609B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a motor that makes a temperature fuse surely operate when the temperature of a stator coil abnormally rises at the occurrence of an abnormality such as the lock of a rotating shaft. <P>SOLUTION: The motor is provided with a terminal base for electrical connection to the stator coil, and the temperature fuse that disconnects a feeding circuit to the stator coil by sensing a temperature rise is arranged on the terminal base. The terminal base comprises a temperature fuse arrangement part whose the other faces is protruded by making one face recessed, and the bottom face of the temperature fuse arrangement part is arranged so as to face the end face of the stator coil. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば換気送風機等の電気機器に使用される電動機に関するものである。   The present invention relates to an electric motor used in an electric device such as a ventilation fan.

従来、ステータコイルの温度上昇を感温して給電回路を断つ温度ヒューズを設けた電動機においては、温度ヒューズ配置部を有する端子台をステータコイルの端面部に対向して設け、温度ヒューズをこの端子台に設けた連通孔を通じてステータコイル端面部に直接臨ませるようにしていた(特許文献１参照)。   Conventionally, in an electric motor provided with a thermal fuse that senses the temperature rise of the stator coil and cuts the power supply circuit, a terminal block having a thermal fuse arrangement portion is provided facing the end surface portion of the stator coil, and the thermal fuse is connected to this terminal. It was made to directly face the end surface portion of the stator coil through a communication hole provided in the base (see Patent Document 1).

実開平５−７０１３９号公報(第１−１２頁、図１)Japanese Utility Model Publication No. 5-70139 (page 1-12, FIG. 1)

特許文献１の電動機では、電動機の回転軸がロックするなどの異常時にステータコイルの温度が異常上昇した場合、空気層を介して熱が温度ヒューズに伝えられるが、熱は電動機内で温度ヒューズ以外の部材にも伝わるため、温度ヒューズに加わる温度が温度ヒューズを溶断するために必要な値に達しないことが生じるという問題点があった。   In the electric motor of Patent Document 1, when the temperature of the stator coil rises abnormally during an abnormality such as when the rotating shaft of the electric motor is locked, heat is transferred to the thermal fuse through the air layer. Therefore, there is a problem in that the temperature applied to the temperature fuse does not reach a value necessary for fusing the temperature fuse.

この発明は上記のような問題点を解決するためになされたもので、電動機の回転軸がロックするなどの異常時にステータコイルの温度が異常上昇した場合、温度ヒューズを確実に動作させることができる電動機を得ることを目的としている。   The present invention has been made to solve the above-described problems. When the temperature of the stator coil rises abnormally, such as when the rotating shaft of the motor is locked, the temperature fuse can be reliably operated. The purpose is to obtain an electric motor.

この発明に係る電動機は、ステータコイルへの電気接続用の端子台を設け、この端子台に温度上昇を感温してステータコイルへの給電回路を断つ温度ヒューズを設けており、この端子台は、一方の面を窪ませることにより他方の面が突出した温度ヒューズ配置部を有し、この温度ヒューズ配置部の底面が上記ステータコイルの端面部と対向するように配設されている。   The electric motor according to the present invention is provided with a terminal block for electrical connection to the stator coil, and is provided with a temperature fuse that senses the temperature rise and cuts off the power feeding circuit to the stator coil. The thermal fuse arrangement part has a thermal fuse arrangement part in which the other surface protrudes by depression of one surface, and the bottom surface of the thermal fuse arrangement part is arranged so as to face the end surface part of the stator coil.

この発明によれば、一方の面を窪ませることにより他方の面が突出した温度ヒューズ配置部を有する端子台が、温度ヒューズ配置部の底面がステータコイルの端面部と対向するように配設されるので、温度ヒューズとステータコイルの間の距離が小さくなり、電動機の回転軸がロックするなどの異常時にステータコイルの温度が異常上昇した場合、温度ヒューズを確実に動作させることができる。   According to the present invention, the terminal block having the thermal fuse arrangement portion in which the other surface protrudes by recessing one surface is arranged such that the bottom surface of the thermal fuse arrangement portion faces the end surface portion of the stator coil. Therefore, the distance between the temperature fuse and the stator coil is reduced, and the temperature fuse can be reliably operated when the temperature of the stator coil abnormally rises during an abnormality such as the rotating shaft of the electric motor locking.

実施の形態
図１は、本発明に係る電動機に係る実施の形態を示す側面図である。端子台部分は断面を表している。図において、ステータコア３２は、複数の鉄心板３５を積層して形成され、その内側縁部に複数のスロット３６が形成されている。ステータコイル５は、ステータコア３２のスロット３６内に収納されているとともに、ステータコア３２の両端部から突出している。
上記ステータコイル５に電気接続させるための端子台１は、絶縁性を有する合成樹脂製で、構造体の主要部である基部１１を有し、この基部１１からステータコア３２の一端面に当接する図示しない突片が突設されている。この端子台１は、一方の面を窪ませることにより他方の面が突出した凹状の温度ヒューズ配置部７を有し、この温度ヒューズ配置部７の底部１２が上記ステータコイル５の端面部と対向するように配設されている。また、端子台１は、温度ヒューズ配置部７の長手方向にその凹部に連続して温度ヒューズのリード線配置部９を有する。
温度ヒューズ２は表面張力型又は感温ペレット型で、本体の両端から一対のリード線４を突出させている。温度ヒューズ２は上記温度ヒューズ配置部７に収められ、リード線４は上記リード線配置部９に収められる。温度ヒューズ配置部７の底部１２と上記ステータコイル５との間には空気層６が介在する。空気層６の厚みとして、巻線の状態などによりステータコイル５のステータコア３２の両端部から突出する量が一定でない場合にも対応できるように、突出量が最大になる場合でもステータコイル５と温度ヒューズ配置底部１２とが接触しない値に設定する。
なお、温度ヒューズ配置部７を構成するための凹みの深さを使用される温度ヒューズ２の厚みより大きくすることで、温度ヒューズ２とステータコイル５の間の距離を端子台の基部１１とステータコイル５の間の距離より小さくしている。 Embodiment FIG. 1 is a side view showing an embodiment of an electric motor according to the present invention. The terminal block portion represents a cross section. In the figure, the stator core 32 is formed by laminating a plurality of iron core plates 35, and a plurality of slots 36 are formed on the inner edge thereof. The stator coil 5 is housed in the slot 36 of the stator core 32 and protrudes from both ends of the stator core 32.
The terminal block 1 for electrical connection to the stator coil 5 is made of an insulating synthetic resin and has a base 11 which is a main part of the structure, and comes into contact with one end surface of the stator core 32 from the base 11. Protruding pieces that do not protrude are provided. The terminal block 1 has a concave temperature fuse arrangement portion 7 whose one surface protrudes by recessing one surface, and the bottom 12 of the temperature fuse arrangement portion 7 faces the end surface portion of the stator coil 5. It is arranged to do. Further, the terminal block 1 has a thermal fuse lead wire arrangement portion 9 continuous with the concave portion in the longitudinal direction of the thermal fuse arrangement portion 7.
The thermal fuse 2 is a surface tension type or a temperature sensitive pellet type, and a pair of lead wires 4 protrude from both ends of the main body. The thermal fuse 2 is accommodated in the thermal fuse arrangement portion 7, and the lead wire 4 is accommodated in the lead wire arrangement portion 9. An air layer 6 is interposed between the bottom 12 of the thermal fuse arrangement 7 and the stator coil 5. As for the thickness of the air layer 6, the stator coil 5 and the temperature can be adjusted even when the amount of protrusion is maximum so that the case where the amount of protrusion from the both ends of the stator core 32 of the stator coil 5 is not constant due to the state of winding can be dealt with. The value is set so that the fuse arrangement bottom 12 does not contact.
In addition, by making the depth of the dent for constituting the thermal fuse arrangement portion 7 larger than the thickness of the thermal fuse 2 to be used, the distance between the thermal fuse 2 and the stator coil 5 is set to the terminal block base 11 and the stator. The distance between the coils 5 is smaller.

図２は端子台の斜視図、図３は端子台の平面図、図４は端子台のＡ−Ａ部の断面図である。温度ヒューズ配置部７は底部が半円筒状の凹みとなっており、この凹みに密着するように温度ヒューズ２は収められている。また、リード線４は折り曲げられ、リード線配置部９の内部を這わされ、両端部は基部１１に設けられている図示しない端子に半田付けされている。
端子台１における温度ヒューズ配置部７及びリード線配置部９の両側部は、樹脂材料がない開口３となっている。この開口３は、温度ヒューズ配置底部７及びリード線配置部９に沿うように設けられている。 2 is a perspective view of the terminal block, FIG. 3 is a plan view of the terminal block, and FIG. 4 is a cross-sectional view of the AA portion of the terminal block. The bottom portion of the thermal fuse arrangement portion 7 is a semicylindrical recess, and the thermal fuse 2 is accommodated in close contact with the recess. Further, the lead wire 4 is bent and wound inside the lead wire placement portion 9, and both end portions are soldered to terminals (not shown) provided on the base portion 11.
Both side portions of the thermal fuse arrangement portion 7 and the lead wire arrangement portion 9 in the terminal block 1 are openings 3 that are free from resin material. The opening 3 is provided along the thermal fuse arrangement bottom portion 7 and the lead wire arrangement portion 9.

次に動作について説明する。本発明に係る電動機において、図示しないロータ体がロックしたまま回転しないなどの異常が生じた場合、ステータコイル５の温度が異常上昇する。このようにステータコイル５の温度が異常上昇すると、温度ヒューズ２に熱が伝えられる。すなわち、ステータコイル５で発生した熱は空気層６及び温度ヒューズ配置部７の底部１２を介し温度ヒューズ２に伝わる。温度ヒューズ２が加熱されて一定温度に達すると溶断し、ステータコイル５への給電回路が断たれ、電動機からの発煙や発火が防止される。   Next, the operation will be described. In the electric motor according to the present invention, when an abnormality occurs such that the rotor body (not shown) does not rotate while being locked, the temperature of the stator coil 5 abnormally rises. Thus, when the temperature of the stator coil 5 rises abnormally, heat is transferred to the thermal fuse 2. That is, the heat generated in the stator coil 5 is transmitted to the thermal fuse 2 through the air layer 6 and the bottom 12 of the thermal fuse arrangement portion 7. When the temperature fuse 2 is heated and reaches a certain temperature, the fuse is blown, the power supply circuit to the stator coil 5 is cut, and smoke and ignition from the motor are prevented.

温度ヒューズ配置部７はステータコア３２の方向に突設されているので、ステータコイル５からの熱は、端子台の基部１１よりも先に上記の通り温度ヒューズ配置部７の底部１２を介し温度ヒューズ２に伝えられる。温度ヒューズ配置部７の両側は開口３となっており、空気の伝熱特性は樹脂材料より悪いので、温度ヒューズ２に伝わった熱がさらに基部１１へ伝わる主要経路は、温度ヒューズリード線４を通る経路及び温度ヒューズ配置部７の底部１２を経由してリード線配置部９を通る経路となる。温度ヒューズリード線４が細いこと、及びリード線配置部９の幅が狭いことから、上記伝熱の主要経路においても伝熱抵抗は大きく、温度ヒューズ２には蓄熱し易く短時間で所定の動作温度に達する。   Since the thermal fuse arrangement portion 7 is provided so as to project in the direction of the stator core 32, the heat from the stator coil 5 passes through the bottom portion 12 of the thermal fuse arrangement portion 7 as described above before the base portion 11 of the terminal block. 2 Since both sides of the thermal fuse arrangement portion 7 are openings 3 and the heat transfer characteristic of air is worse than that of a resin material, the main path through which the heat transferred to the thermal fuse 2 is further transferred to the base 11 is the thermal fuse lead wire 4. A path passing through and a path passing through the lead wire placement portion 9 via the bottom 12 of the thermal fuse placement portion 7. Since the thermal fuse lead wire 4 is thin and the lead wire arrangement part 9 is narrow, the heat transfer resistance is large even in the main heat transfer path, and the thermal fuse 2 is easy to store heat and performs a predetermined operation in a short time. Reach temperature.

以上、この実施の形態によれば、ステータコイルからの熱が温度ヒューズに蓄えられ易く、ステータコイルの温度が異常上昇した場合、温度ヒューズの温度が速やかに上昇し、温度ヒューズを確実に動作させることができる。   As described above, according to this embodiment, the heat from the stator coil is easily stored in the thermal fuse, and when the temperature of the stator coil abnormally rises, the temperature of the thermal fuse rises quickly, and the thermal fuse is operated reliably. be able to.

なお、上記実施の形態において、温度ヒューズ配置部及びリード線配置部の両側部を開口としているが、ステータコイルがステータコアから突出する高さを管理でき空気層をなしにできる場合には、特にこの開口を設けなくてもよい。この場合には、ステータコイルからの熱を温度ヒューズ配置底部を介して効率よく温度ヒューズに伝えることができ、温度ヒューズを確実に動作させることができるからである。   In the above-described embodiment, both sides of the thermal fuse arrangement portion and the lead wire arrangement portion are openings. This is especially true when the height of the stator coil protruding from the stator core can be managed and an air layer can be formed. It is not necessary to provide an opening. In this case, heat from the stator coil can be efficiently transmitted to the temperature fuse via the bottom portion of the temperature fuse arrangement, and the temperature fuse can be reliably operated.

この発明の実施の形態を示す電動機の側面図である。It is a side view of the electric motor which shows embodiment of this invention. この発明の実施の形態を示す電動機の端子台の斜視図である。It is a perspective view of the terminal block of the electric motor which shows embodiment of this invention. この発明の実施の形態を示す電動機の端子台の平面図である。It is a top view of the terminal block of the electric motor which shows embodiment of this invention. 図３におけるＡ−Ａ線の断面図である。It is sectional drawing of the AA line in FIG.

符号の説明Explanation of symbols

１：端子台
２：温度ヒューズ
３：開口
４：リード線
５：ステータコイル
６：空気層
７：温度ヒューズ配置部
９：リード線配置部
１１：端子台の基部
１２：温度ヒューズ配置底部
３２：ステータコア
３５：鉄心板
３６：スロット 1: Terminal block 2: Thermal fuse 3: Opening 4: Lead wire 5: Stator coil 6: Air layer 7: Thermal fuse arrangement portion 9: Lead wire arrangement portion 11: Base portion of terminal block 12: Thermal fuse arrangement bottom portion 32: Stator core 35: Iron core plate 36: Slot

Claims (4)

ステータコイルへの電気接続用の端子台を設け、上記端子台に温度上昇を感温してステータコイルへの給電回路を断つ温度ヒューズを設けた電動機において、上記端子台は、一方の面を窪ませることにより他方の面が突出した温度ヒューズ配置部を有し、上記温度ヒューズ配置部の底面が上記ステータコイルの端面部と対向するように配設されたことを特徴とする電動機。   In the electric motor provided with a terminal block for electrical connection to the stator coil, and provided with a thermal fuse that senses the temperature rise and cuts the power supply circuit to the stator coil, the terminal block has a concave surface on one side. An electric motor comprising: a thermal fuse arrangement portion whose other surface protrudes by being bent, and arranged such that a bottom surface of the thermal fuse arrangement portion faces an end surface portion of the stator coil. 上記温度ヒューズ配置部の凹みの深さが上記温度ヒューズの厚みより大きいことを特徴とする請求項１記載の電動機。   2. The electric motor according to claim 1, wherein a depth of the recess of the thermal fuse arrangement portion is larger than a thickness of the thermal fuse. 上記端子台における上記温度ヒューズ配置部の両側が開口とされたことを特徴とする請求項１又は請求項２記載の電動機。   3. The electric motor according to claim 1, wherein both sides of the thermal fuse arrangement portion in the terminal block are opened. 上記端子台における上記温度ヒューズ配置部の長手方向にリード線配置部を設け、上記温度ヒューズ配置部の両側及び上記リード線配置部の両側が開口とされたことを特徴とする請求項１又は請求項２記載の電動機。   2. A lead wire placement portion is provided in a longitudinal direction of the thermal fuse placement portion in the terminal block, and both sides of the thermal fuse placement portion and both sides of the lead wire placement portion are opened. Item 3. The electric motor according to Item 2.
JP2005009885A 2005-01-18 2005-01-18 Electric motor Expired - Fee Related JP4680609B2 (en)

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Application Number Priority Date Filing Date Title
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JP4680609B2 JP4680609B2 (en) 2011-05-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8803378B2 (en) 2008-12-09 2014-08-12 Toyota Jidosha Kabushiki Kaisha Motor generator for vehicle technical field

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0742560U (en) * 1993-12-27 1995-08-04 東芝機器株式会社 Thermal fuse mounting structure in electric motor for electric fan
EP0727864A2 (en) * 1995-02-18 1996-08-21 EBM ELEKTROBAU MULFINGEN GmbH &amp; Co. Electric motor interconnection board
JPH1094222A (en) * 1996-09-18 1998-04-10 Fanuc Ltd Method of attaching temperature sensor for motor winding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0742560U (en) * 1993-12-27 1995-08-04 東芝機器株式会社 Thermal fuse mounting structure in electric motor for electric fan
EP0727864A2 (en) * 1995-02-18 1996-08-21 EBM ELEKTROBAU MULFINGEN GmbH &amp; Co. Electric motor interconnection board
JPH1094222A (en) * 1996-09-18 1998-04-10 Fanuc Ltd Method of attaching temperature sensor for motor winding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8803378B2 (en) 2008-12-09 2014-08-12 Toyota Jidosha Kabushiki Kaisha Motor generator for vehicle technical field

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