JPH0923616A - Temperature protector for motor - Google Patents
Temperature protector for motorInfo
- Publication number
- JPH0923616A JPH0923616A JP7167255A JP16725595A JPH0923616A JP H0923616 A JPH0923616 A JP H0923616A JP 7167255 A JP7167255 A JP 7167255A JP 16725595 A JP16725595 A JP 16725595A JP H0923616 A JPH0923616 A JP H0923616A
- Authority
- JP
- Japan
- Prior art keywords
- thermostat
- motor
- brush
- brush base
- heating coil
- 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
- 230000001012 protector Effects 0.000 title 1
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Dc Machiner (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はモータの温度保護装置に
係り、特に、車両用ポンプモータとして好適な焼損を防
止する構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor temperature protection device and, more particularly, to a structure suitable for a vehicle pump motor to prevent burnout.
【０００２】[0002]
【従来の技術】従来、モータ保護装置については、例え
ば、実開平2−88454号公報に記載のように、リレーホル
ダにサーモスタットを内包しブラシ保持板上に組付ける
構造であった。2. Description of the Related Art Conventionally, a motor protection device has a structure in which a relay holder includes a thermostat and is assembled on a brush holding plate, as described in Japanese Utility Model Laid-Open No. 2-88454.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記公知技術
では、以下の課題が存在する。すなわち、リレーホルダ
の発熱によってサーモスタットの電気接点を開閉するた
め、モータが異常な過負荷の状態で秒単位の短時間でモ
ータを流れる電流を遮断するように設定すると、定常運
転の定格負荷では、リレーホルダに流れる電流の２乗と
抵抗値の積の電力損失によって定まる分単位の長い時間
で、サーモスタットの電気接点は開くが要望する時間に
達する以前の短い時間で開いてしまう不都合があった。
これは相反する要望項目を満足させることの難しさであ
って大きな課題となっていた。更に、リレーホルダが大
電流時秒単位で上昇する急激な温度上昇に対して、ケー
スの中に収められたサーモスタットの温度が追随でき
ず、サーモスタット動作以前にモータが焼損したり、サ
ーモスタットのケースが熱で破損しサーモスタットが動
作できないこともあった。この防止策とし、低い温度設
定のサーモスタットを使用すると、定格負荷では要望時
間より短い時間で作動してしまう難点があった。本発明
の目的は、これらの動作時間を設定通りに動作させるこ
とにある。However, the above-mentioned known technique has the following problems. That is, since the thermostat's electrical contacts are opened and closed by the heat generated by the relay holder, if the motor is set to shut off the current flowing through the motor in a short time in seconds under abnormal overload conditions, at the rated load of steady operation, The electrical contacts of the thermostat are opened for a long time determined by the power loss of the product of the square of the current flowing through the relay holder and the resistance value, but the electrical contacts of the thermostat are opened, but there is a disadvantage that they open in a short time before the desired time is reached.
This is a difficulty in satisfying contradictory requirements, and has been a major issue. Furthermore, the temperature of the thermostat housed in the case cannot keep up with the rapid temperature rise of the relay holder in seconds when a large current flows, and the motor burns out before the thermostat operates, or the case of the thermostat In some cases, it was damaged by heat and the thermostat could not operate. If a thermostat with a low temperature setting is used as a preventive measure against this, there is a problem in that the load operates at a rated load in a shorter time than desired. An object of the present invention is to operate these operation times as set.
【０００４】[0004]
【課題を解決するための手段】本発明は外周に発熱コイ
ルを巻装したサーモスタットを合成樹脂製のブラシホル
ダベースの凹部成形材部分に嵌め込み金属製カバーとの
間に弾性体の樹脂を介して押し付けながら決まった位置
に固定することによって達成される。According to the present invention, a thermostat having a heating coil wound around its outer periphery is fitted into a recessed molding material portion of a brush holder base made of synthetic resin, and an elastic resin is interposed between the thermostat and the metal cover. It is achieved by pressing and fixing in a fixed position.
【０００５】[0005]
【作用】以上のように構成した本発明で、サーモスタッ
トはモータの瞬時の過負荷時では放熱効果はほとんどな
いため短時間でサーモスタットの接点を開くことがで
き、定格運転時では温度が徐々に上昇するため弾性体を
介して金属カバーに放熱を図ることで温度上昇の調整を
行い長時間運転後接点を開くことができ、この二つの動
作時間を設定通りにモータを保護する。In the present invention configured as described above, since the thermostat has almost no heat dissipation effect when the motor is momentarily overloaded, the contact of the thermostat can be opened in a short time, and the temperature gradually rises during rated operation. Therefore, by radiating heat to the metal cover through the elastic body, the temperature rise can be adjusted and the contacts can be opened after a long time operation, and the motor can be protected according to these two operation times as set.
【０００６】[0006]
【実施例】以下、本発明の一実施例を図１ないし図７に
より説明する。図２は本発明の一実施例によるモータの
温度保護装置の要部の断面図で、１は樹脂ケースに内蔵
された温度接点を有するサーモスタット、２は絶縁電線
からなる導体を巻装した発熱コイルで図示しない絶縁ワ
ニス等で固着している。３はモータ、４は電機子、５は
固定子、６は金属製のブラケットで絶縁材料の成形品か
らなるブラシベース７がねじ７１で固定されており、そ
の上面に整流子４１と対向し、ブラシ８が摺動自在に固
定されている。そして、ブラケット６とブラシベース７
間の空間でブラシベースの凹部成形部７２には例えばゴ
ム等の弾性体９を介してサーモスタットが嵌め込まれた
状態で押し付けながら定まった位置に取付けられるよう
に構造されている。更にサーモスタット１に巻装した発
熱コイル２の一端は通電用のリード線と接続され、他端
はターミナルを介してブラシと接続されており、各々発
熱コイル２の端部はブラシベースの溝７３からブラシ取
付面の側に引き出されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a cross-sectional view of an essential part of a temperature protection device for a motor according to an embodiment of the present invention, in which 1 is a thermostat having a temperature contact embedded in a resin case, and 2 is a heating coil wound with a conductor made of an insulated wire. It is fixed with an insulating varnish (not shown). Reference numeral 3 is a motor, 4 is an armature, 5 is a stator, 6 is a metal bracket, and a brush base 7 made of a molded product of an insulating material is fixed by a screw 71. The brush base 7 faces the commutator 41 on its upper surface, The brush 8 is slidably fixed. And the bracket 6 and the brush base 7
In the space between them, the brush base recessed portion 72 is structured such that it can be attached to a fixed position while being pressed while the thermostat is fitted through the elastic body 9 such as rubber. Further, one end of the heating coil 2 wound around the thermostat 1 is connected to a lead wire for energization, and the other end is connected to a brush via a terminal. Each end of the heating coil 2 extends from the groove 73 of the brush base. It is pulled out to the side of the brush mounting surface.
【０００７】次にこの動作を説明する。スイッチＳ１を
閉じるとサーモスタット１を介して通電され、スイッチ
Ｓ２を閉じることによって、サーモスタット１に巻装し
た発熱コイル２を介して、モータに通電され電機子４が
回転する。定常負荷時で、通電電流は少なく発熱コイル
２の発熱の一部は弾性体９を介してブラケット６から外
部に放熱されるため図４のｂに示したようにサーモスタ
ット１の温度上昇はゆるやかで長時間運転の後、所定の
温度に達したときサーモスタット１の接点が開きスイッ
チＳ２を開いてモータの動作を止め焼損を防止する。
又、過負荷時で、定常負荷時に対し通電電流は多く流れ
図４のａに示したように、発熱コイル２の急激な温度上
昇により、放熱が追従できず短時間でサーモスタット１
の接点が開き、モータの動作を止め焼損を防止する。こ
の場合、発熱コイル２とサーモスタット１の内部の温度
差が大きいためサーモスタット１の樹脂ケースが溶融す
る以前に接点が開くようにサーモスタット１の温度設定
と時間設定を行っている。この様な安定した性能が得ら
れるようにサーモスタット１の取付位置をいつも決まっ
た位置となるように取付構造を定めたものである。Next, this operation will be described. When the switch S1 is closed, electricity is supplied through the thermostat 1, and when the switch S2 is closed, electricity is supplied to the motor through the heating coil 2 wound around the thermostat 1 to rotate the armature 4. At the time of steady load, the energizing current is small and a part of the heat generated by the heat generating coil 2 is radiated to the outside from the bracket 6 via the elastic body 9, so that the temperature rise of the thermostat 1 is gentle as shown in FIG. When a predetermined temperature is reached after a long period of operation, the contacts of the thermostat 1 open to open the switch S2 to stop the operation of the motor and prevent burnout.
Further, during overload, a larger amount of current flows than during steady load, and as shown in a of FIG. 4, due to the rapid temperature rise of the heating coil 2, heat radiation cannot follow and the thermostat 1
The contact of opens to stop the motor operation and prevent burnout. In this case, since the temperature difference between the heating coil 2 and the thermostat 1 is large, the temperature and time of the thermostat 1 are set so that the contacts open before the resin case of the thermostat 1 melts. In order to obtain such stable performance, the mounting structure of the thermostat 1 is determined so that the mounting position is always fixed.
【０００８】[0008]
【発明の効果】本発明によれば過負荷運転時と定常運転
時に巻線を行ったサーモスタットを定まった凹部位置に
嵌め込み、弾性体を介してブラシベースで抑え込み挾む
ので、発熱コイルを巻装したサーモスタットは取付位置
による放熱の差がなく設定時間通りにモータを保護でき
る。EFFECTS OF THE INVENTION According to the present invention, since the thermostat wound during overload operation and steady operation is fitted in a fixed recessed position and held by the brush base through the elastic body, the heating coil is wound. The thermostat has no difference in heat dissipation depending on the mounting position and can protect the motor at the set time.
【図１】サーモスタットに発熱コイルを巻装した斜視
図。FIG. 1 is a perspective view in which a heating coil is wound around a thermostat.
【図２】モータに本発明サーモスタットを取付けた要部
の断面図。FIG. 2 is a sectional view of a main part in which the thermostat of the present invention is attached to a motor.
【図３】動作回路図。FIG. 3 is an operation circuit diagram.
【図４】温度変化の特性図。FIG. 4 is a characteristic diagram of temperature change.
【図５】温度変化の特性図。FIG. 5 is a characteristic diagram of temperature change.
【図６】サーモスタット取付構造の断面図。FIG. 6 is a sectional view of a thermostat mounting structure.
【図７】合成樹脂製ブラシホルダを取付けた正面図。FIG. 7 is a front view with a synthetic resin brush holder attached.
１…サーモスタット、２…発熱コイル、３…モータ、４
…電機子、５…固定子、６…ブラケット、７…ブラシベ
ース、８…ブラシ、４１…整流子、７１…ねじ、７２…
ブラシベースの溝。1 ... Thermostat, 2 ... Heating coil, 3 ... Motor, 4
... armature, 5 ... stator, 6 ... bracket, 7 ... brush base, 8 ... brush, 41 ... commutator, 71 ... screw, 72 ...
Brush base groove.
フロントページの続き (72)発明者 冨手 寿男 茨城県ひたちなか市東石川西古内3085番地 の５ 日立カーエレクトロニクス株式会社 内Front Page Continuation (72) Inventor, Hisao Tomite, No. 3085, Nishigouchi, Higashiishikawa, Hitachinaka, Ibaraki 5 Hitachi Car Electronics Co., Ltd.
Claims (1)
とき、サーモスタットの作動で電流を遮断し、運転を停
止して前記モータの温度上昇を抑制するようにしたモー
タの温度保護装置において、前記モータを流れる電流に
よって発熱する発熱コイルを巻装したサーモスタット
と、前記サーモスタットを保持する凹部に成形した合成
樹脂製のブラシベースからなり前記サーモスタットを熱
伝導部材からなる弾性部材を介してブラケットに押し付
けるように固定したことを特徴とするモータの温度保護
装置。1. A temperature protection device for a motor, wherein when the temperature of the motor reaches a predetermined value, the current is cut off by the operation of a thermostat and the operation is stopped to suppress the temperature rise of the motor. , A thermostat wound with a heating coil that generates heat by a current flowing through the motor, and a brush base made of synthetic resin formed in a recess for holding the thermostat, the thermostat being attached to a bracket via an elastic member made of a heat conducting member. Motor temperature protection device characterized by being fixed so as to be pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7167255A JPH0923616A (en) | 1995-07-03 | 1995-07-03 | Temperature protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7167255A JPH0923616A (en) | 1995-07-03 | 1995-07-03 | Temperature protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0923616A true JPH0923616A (en) | 1997-01-21 |
Family
ID=15846349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7167255A Pending JPH0923616A (en) | 1995-07-03 | 1995-07-03 | Temperature protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0923616A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100360865B1 (en) * | 2000-07-14 | 2002-11-13 | 주식회사 엘지이아이 | Commutator motor |
| US8654498B2 (en) | 2011-02-14 | 2014-02-18 | Seiko Epson Corporation | Electromechanical device, movable body, robot, method of measuring temperature of electromechanical device |
| CN107632645A (en) * | 2017-10-26 | 2018-01-26 | 合肥超越电器有限责任公司 | It is a kind of that there is the integrated temperature controller for putting line cooling mechanism |
-
1995
- 1995-07-03 JP JP7167255A patent/JPH0923616A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100360865B1 (en) * | 2000-07-14 | 2002-11-13 | 주식회사 엘지이아이 | Commutator motor |
| US8654498B2 (en) | 2011-02-14 | 2014-02-18 | Seiko Epson Corporation | Electromechanical device, movable body, robot, method of measuring temperature of electromechanical device |
| CN107632645A (en) * | 2017-10-26 | 2018-01-26 | 合肥超越电器有限责任公司 | It is a kind of that there is the integrated temperature controller for putting line cooling mechanism |
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