JPH02114885A - Protective circuit for power window actuator of automobile - Google Patents
Protective circuit for power window actuator of automobileInfo
- Publication number
- JPH02114885A JPH02114885A JP26695288A JP26695288A JPH02114885A JP H02114885 A JPH02114885 A JP H02114885A JP 26695288 A JP26695288 A JP 26695288A JP 26695288 A JP26695288 A JP 26695288A JP H02114885 A JPH02114885 A JP H02114885A
- Authority
- JP
- Japan
- Prior art keywords
- curie point
- actuator
- current
- temperature coefficient
- positive temperature
- 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.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 title abstract 4
- 239000005357 flat glass Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、比較的大きな電力を要するアクチュエーター
に使用できる自動車のパワーウィンドアクチュエーター
用保護回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a protection circuit for a motor vehicle power window actuator, which can be used for actuators that require relatively large amounts of power.
従来の技術
最近、自動車運転の快適性、利便性を追究するため、エ
レクトロニクス化が進み、車窓も電動式のパワーウィン
ド化がなされつつある。BACKGROUND OF THE INVENTION Recently, in order to improve the comfort and convenience of driving a car, the use of electronics has progressed, and car windows are increasingly being equipped with electric power windows.
このパワーウィンドは、窓ガラスの開閉動作途中におい
て、数アンペアのノーマル電流が流れ、このノーマル電
流によってモーターの異常発熱が生じることはない。In this power window, a normal current of several amperes flows during the opening/closing operation of the window glass, and this normal current does not cause abnormal heat generation in the motor.
しかしながら、窓ガラスがウィンドの下死点または上死
点に達するとアクチュエーターモーターの回転は機械的
に停止し、モーター抵抗は回転時の数分の１になり、何
らかの異常で窓ガラスの開閉スイッチがオンし続けた場
合、アクチュエーターモーターには、異常電流（モータ
−ロック電流１５〜２５アンペア程度）が流れ続け、モ
ーターは過熱状態となってモーターコイルの絶縁劣化が
進み、焼損に至る。However, when the window glass reaches the bottom dead center or top dead center of the window, the rotation of the actuator motor stops mechanically, the motor resistance becomes a fraction of the rotation, and some abnormality causes the window glass opening/closing switch to stop. If it continues to be turned on, an abnormal current (motor lock current of about 15 to 25 amperes) continues to flow through the actuator motor, causing the motor to overheat and deteriorating the insulation of the motor coil, leading to burnout.
従来技術では、このような過電流の防止のため一般にバ
イメタルスイッチまたは半導体スイッチ回路が用いられ
ていた。In the prior art, bimetallic switches or semiconductor switch circuits have generally been used to prevent such overcurrent.
発明が解決しようとする問題点
しかし、上記のような従来技術では、下記の間照点を有
していた。Problems to be Solved by the Invention However, the above-mentioned conventional techniques have the following blind points.
（１）バイメタルスイッチは、比較的低コストであるが
有接点であり、接点の損傷、振動による誤動作があり、
また回路電流遮断までの時間精度が悪い。(1) Bimetal switches are relatively low-cost, but they have contacts and are prone to malfunction due to contact damage and vibration.
Also, the accuracy of the time until the circuit current is cut off is poor.
（２）半導体回路を用いたものは、精度が高い特徴を有
してはいるが、電流検出、タイマー回路および大きな容
量のリレー（約５００Ｗ）を必要とし、高価となる。(2) Although devices using semiconductor circuits are characterized by high accuracy, they require current detection, a timer circuit, and a large capacity relay (approximately 500 W), making them expensive.
問題点を解決するだめの手段
本発明は上記問題点に鑑み、信頼性が高く、かつ低コス
トで比較的大電流を要する自動車のパワーウィンドアク
チュエーターの過電流保護回路を提供するものである。Means for Solving the Problems In view of the above-mentioned problems, the present invention provides an overcurrent protection circuit for an automobile power window actuator that is highly reliable, inexpensive, and requires a relatively large current.
過電流保護素子として、正特性サーミスタが一般に用い
られているが、制御電流値が１〜３Ａ程度と小電流で、
自動車のパワーウィンドアクチュエーターのように１５
〜２５Ａの大電流を制御することは考えられてなく、ま
た適用できなかった。A positive characteristic thermistor is generally used as an overcurrent protection element, but the control current value is as small as 1 to 3A,
Like a car's power window actuator 15
Controlling a large current of ~25A has not been considered nor applicable.
本発明者は種々検討の結果、１１０℃〜１６０℃のキュ
ーリ点を有する複数個の正特性サーミスタを並列に配置
し、並列接続した正特性サーミスタとアクチュエーター
モーターとを直列接続し、正特性サーミスタのキューリ
点をｙ、並列合成抵抗をＸとしたとき、
１１０≦ｙ≦１６０ｙ≦３５７．１４ ｘ ＋ ７５．
３６なる関係を有することにより、１５〜２５Ａの大電
流を制御し、かつ精度の高い自動車のパワーウィンドア
クチュエーター用保護回路を提供することが可能である
ことを見出したものである。As a result of various studies, the present inventor arranged a plurality of positive temperature coefficient thermistors having a Curie point of 110°C to 160°C in parallel, and connected the parallel connected positive coefficient thermistors and an actuator motor in series. When the Curie point is y and the parallel combined resistance is X, 110≦y≦160y≦357.14 x + 75.
It has been discovered that by having a relationship of 36, it is possible to control a large current of 15 to 25 A and provide a highly accurate protection circuit for an automobile power window actuator.
作用
第１図は本発明の基本的回路構成で、この回路構成にて
ウィンドの窓ガラスを開閉スイッチによってオンオフし
、開閉動作を行うと第３図のごとく、動作電流が流れる
。すなわち、「開」側にオンするとアクチュエーターモ
ーターには数アンペアのノーマル電流が流れ、窓ガラス
が開ききっても１秒程度スイッチをオンし続けると、そ
の間モーターは回転できないままノーマル動作電流の数
倍のロック電流が流れる。スイッチをオフして作動体止
時間０．５〜１秒の後に「閉」側にオンし、後同様な作
動を繰り返した時の動作電流の状態を示している。Operation FIG. 1 shows the basic circuit configuration of the present invention. With this circuit configuration, the window glass is turned on and off by an opening/closing switch, and when the opening/closing operation is performed, an operating current flows as shown in FIG. 3. In other words, when the actuator motor is turned on to the "open" side, a normal current of several amperes flows through the actuator motor, and if the switch is kept on for about a second even after the window glass is fully opened, the motor cannot rotate during that time and the normal operating current is several times the normal operating current. lock current flows. The state of the operating current is shown when the switch is turned off, the operating body is stopped for 0.5 to 1 second, the switch is turned on to the "close" side, and the same operation is repeated.
次に、ウィンドをロック状態にして開閉スイッチが破損
し、オン状態になり続けたり、ウィンドの開閉時に何ら
かの原因でアクチュエーターモーターに過大な機械的負
荷がかかるという異常が生じた場合を想定し、本回路に
ロック電流を流し続けると、アクチュエーターモーター
に直列に入っている正特性サーミスタはそのロック状態
の過電流により自己発熱が促進され、該サーミスタ素子
温度が上昇し、第２図に示すようにある一定の温度すな
わち、キューリ点（Ｃ，Ｐ）温度に達し、該サーミスタ
の抵抗値が急上昇する。この抵抗値の急上昇により回路
電流は、第４図に示すように急激に抑制され、ノーマル
動作電流以下にしぼられ、過電流によるアクチュエータ
ーの加熱、焼損が防止できる。Next, suppose that the opening/closing switch is damaged with the window locked and remains on, or that an abnormality occurs in which an excessive mechanical load is applied to the actuator motor for some reason when opening/closing the window. If the locking current continues to flow through the circuit, the positive temperature coefficient thermistor connected in series with the actuator motor will promote self-heating due to the overcurrent in the locked state, and the temperature of the thermistor element will rise, as shown in Figure 2. When a certain temperature, that is, the Curie point (C, P) temperature is reached, the resistance value of the thermistor suddenly increases. Due to this rapid increase in resistance value, the circuit current is rapidly suppressed as shown in FIG. 4, and is reduced to below the normal operating current, thereby preventing heating and burnout of the actuator due to overcurrent.
本発明は第１図に示したように、極めて簡単な回路構成
にて無接点で高信頼性を有し、かつ安価な自動車のパワ
ーウィン１゛アクヂユエーター用の保護回路を提供する
ことができるものである。As shown in FIG. 1, the present invention is capable of providing a protection circuit for a power win 1 actuator of an automobile that has an extremely simple circuit configuration, has no contact, has high reliability, and is inexpensive. It is.
実施例 以下、本発明を実施例に基づき詳細に説明する。Example Hereinafter, the present invention will be explained in detail based on examples.
使用した正特性サーミスタは主原料がチタン酸バリウム
であり、キューリ点を変えるため、キューリ点のシフタ
ー剤としてストロンチウムおよび／または鉛の含有量を
変えて添加し、さらに微量の稀土類元素（ここでは酸化
イツトリウム）を加え、キューリ点が１００℃〜１６０
℃となる組成の材料を作成し、各々２０φＸ０．７ｔ＋
ｕに成型した成型体を焼成し、両面に電極（無電解ニッ
ケルおよび電気錫メツキ）を付与し、正特性サーミスタ
素子（１６，５φＸ０．６ｔｍｍ）を作成した。得られ
た素子の抵抗は０．４６〜０．５Ωで比抵抗は１５．３
Ωｃｍ〜１４．０Ωｃｍであった。この正特性サーミス
タ素子２〜５個を並列に接続し、第１図に示すように正
特性サーミスタをアクチュエーターモーターに直列に接
続し、電源として１２Ｖ−ＤＣを与え、第３図に示す開
閉動作を行い、その時のノーマル動作電流、ロック電流
、８０°Ｃ作動繰り返し回数、作動時間を測定した結果
を第１表に示す。The main raw material of the positive temperature coefficient thermistor used is barium titanate, and in order to change the Curie point, varying contents of strontium and/or lead are added as a shifter agent for the Curie point, and a trace amount of a rare earth element (here, Yttrium oxide) is added, and the curie point is 100℃~160℃.
Create materials with a composition of ℃, each 20φX0.7t+
The molded body was fired, and electrodes (electroless nickel and electrolytic tin plating) were applied to both surfaces to produce a positive temperature coefficient thermistor element (16.5φ x 0.6tmm). The resistance of the obtained element was 0.46-0.5Ω, and the specific resistance was 15.3.
It was Ωcm to 14.0 Ωcm. Two to five of these positive temperature coefficient thermistor elements are connected in parallel, and the positive temperature coefficient thermistor is connected in series to the actuator motor as shown in Figure 1, and 12V-DC is applied as a power source to perform the opening/closing operation shown in Figure 3. Table 1 shows the results of measuring the normal operating current, locking current, number of repetitions of 80°C operation, and operating time.
なお、開閉動作は開閉動作回数が極めて少ないと考えら
れる雰囲気温度８０℃の静止気流中にて行い、ノーマル
動作（モーター回転動作）は４秒、ロック状態時間（モ
ーターロック状Ｂ）は０．５秒、作動体止時間は０．５
秒とし、アクチュエーターモーターはノーマル動作時２
．０Ω、ロック状態時０．５Ωのものを用いた。The opening/closing operation was performed in a static airflow at an ambient temperature of 80°C, where the number of opening/closing operations is considered to be extremely small.The normal operation (motor rotation operation) was 4 seconds, and the locked state time (motor lock state B) was 0.5 seconds. seconds, operating body stop time is 0.5
seconds, and the actuator motor is 2 seconds during normal operation.
．． 0Ω and 0.5Ω in the locked state were used.
また、作動時間は２５°Ｃ静止気流中にて、モーターロ
ック電流を流し、正特性サーミスタが発熱し、抵抗値が
上昇してノーマル電流値まで電流が減衰するまでの時間
とした。Further, the operating time was defined as the time required for a motor lock current to flow in a static airflow at 25° C., until the positive temperature coefficient thermistor generates heat, the resistance value increases, and the current attenuates to the normal current value.
（以下余白）
第１表の実施例において、試料Ｎｏ、１〜９．１ｌｋ１
．１１〜１３、Ｎｏ、 １６ 、、陽１７、陽２１は本
発明の詳細な説明するための比較例を示したものである
。(Margin below) In the examples in Table 1, sample No. 1 to 9.1lk1
．． Nos. 11 to 13, No. 16, No. 17, and No. 21 show comparative examples for explaining the present invention in detail.
すなわち、
■素子のキューリ点が１００℃の場合、素子の並列合成
抵抗が０．１Ωであっても、８０℃での作動繰り返し回
数が２回未満であり、窓ガラスの開閉機能を有さない。In other words, ■If the Curie point of the element is 100°C, even if the parallel combined resistance of the element is 0.1Ω, the number of repetitions of operation at 80°C is less than 2, and it does not have the function of opening and closing the window glass. .
■素子のキューリ点が１１０℃の場合、素子の並列合成
抵抗が０．１Ωを超えると８０℃での作動繰り返し回数
が０回乃至１回で充分な開閉機能でない。(2) When the Curie point of the element is 110°C, if the parallel combined resistance of the element exceeds 0.1Ω, the number of repetitions of operation at 80°C is 0 to 1, and the opening/closing function is not sufficient.
■素子のキューリ点が１２０°Ｃの場合は、素子の並列
合成抵抗が０．１６’７Ω以上、また素子のキューリ点
が１３５℃の場合は、素子の並列合成抵抗が０．２５Ω
以上、さらに素子のキューリ点が１６０℃の場合は、素
子の並列合成抵抗が０．５Ω以上のいずれの組合せも８
０℃の作動繰り返し回数が２回未満の作動で減流してし
まい、その後作動しなく、機能は実用上極めて不便であ
り、開閉機能として充分でない。■If the Curie point of the element is 120°C, the parallel combined resistance of the element is 0.16'7Ω or more, and if the Curie point of the element is 135°C, the parallel combined resistance of the element is 0.25Ω.
In addition to the above, if the Curie point of the element is 160°C, any combination in which the parallel combined resistance of the elements is 0.5Ω or more is 8
The flow decreases when the number of repetitions of operation at 0° C. is less than two times, and the device does not operate after that, making the function very inconvenient in practical terms and not sufficient as an opening/closing function.
また、作動時間（モーターロック状態での電流がノーマ
ル電流までに減流するまでの時間）が長いとアクチュエ
ーターに過大な電流が長時間流れ続けてモーターが焼損
するため、作動時間は１０秒以内が好ましい。In addition, if the operating time (the time it takes for the current to reduce to the normal current when the motor is locked) is long, excessive current will continue to flow to the actuator for a long time and the motor will burn out, so the operating time should be within 10 seconds. preferable.
自動車のパワーウィンドアクチュエーター用保護回路と
しては、８０°Ｃの作動繰り返し回数が多ければ多い程
、かつ作動時間が短ければ短い程好ましいが、パワーウ
ィンドの実使用動作およびモター容量から８０°Ｃでの
繰り返し回数は２回収」二、好ましくは５回以上で、作
動時間は常温で１０秒以内が好ましい。As a protection circuit for an automobile's power window actuator, the more times the 80°C operation is repeated, and the shorter the operating time, the better. The number of repetitions is 2, preferably 5 or more times, and the operation time is preferably within 10 seconds at room temperature.
第１表の結果より素子のキューリ点は、１１０°Ｃ以上
で、
で、８０°Ｃでの作動操り返し回数は２回以上、２５°
Ｃでの作動時間は１０秒以内で自動車のパワーウィンド
アクチユニーク−用保護回路としての機能を有している
と言える。From the results in Table 1, the Curie point of the element is 110°C or higher, and the number of operation cycles at 80°C is 2 or more times, 25°
The operating time at C is less than 10 seconds, and it can be said that it functions as a protection circuit for the power window actuator of an automobile.
なお、キューリ点が１６０℃を超えるとなると、作動状
態における素子の表面温度は１９０℃となり、ドア内部
が高温となるため好ましくなく、また作動時間は１０秒
以上となり、モーターの焼損する危険性が生じる。If the Curie point exceeds 160°C, the surface temperature of the element in the operating state will be 190°C, which is undesirable because the inside of the door will become hot, and the operating time will be more than 10 seconds, increasing the risk of motor burnout. arise.
以上の結果より、正特性ザーミスタ素子のキューリ点を
ｙ、素子の並列合成抵抗をＸとすると、自動車のパワー
ウィンドアクチュエーターの保護機能として上記（１）
項で満足するｘ、ｙの関係は、縦軸にｙ、横軸をＸとし
、（１）項のｘ、ｙの各点を結ぶ直線を求め、その勾配
と切片を最小自乗法により計算し、得られた関係式は、
１１０≦ｙ≦１６０ｙ≦３５７．１４ ｘ −１−７５
，３６となり、この関係を満たずｙ％Ｘの組合せで得ら
れるキューリ点と並列合成抵抗が本発明の自動車のパワ
ーウィンドアクチユニーク−用保護回路に適切な使用範
囲となる。From the above results, if the Curie point of the positive coefficient thermistor element is y and the parallel combined resistance of the elements is
To find the relationship between x and y that is satisfied in the term, let y be the vertical axis and , the obtained relational expression is: 110≦y≦160y≦357.14 x −1-75
, 36, and the Curie point and parallel combined resistance obtained by the combination of y%X that do not satisfy this relationship are suitable for use in the automotive power window actuator protection circuit of the present invention.
実施例の試料歯１９の素子のキューリ点１３５℃、並列
合成抵抗０．１．２５Ωの場合及び比較例として試料１
１に＋、 ９の素子のキューリ点１１０°Ｃ１並列合成
抵抗０．１２５Ωの場合の８０℃で作動繰り返し状態を
各々第５図、第６図に示す。In the case where the Curie point of the element of sample tooth 19 in the example is 135°C and the parallel combined resistance is 0.1.25Ω, and in the case of sample 1 as a comparative example.
Figures 5 and 6 show the repeated operation at 80°C when the Curie points of elements 1, 9, and 9 have a Curie point of 110°C and a parallel combined resistance of 0.125Ω, respectively.
発明の効果
上述のように正特性サーミスタのキューリ点および並列
合成抵抗の組合せにより、大電流が流れる自動車のパワ
ーウィンドアクチュエーター用保護回路として低コスト
でかつ信頼性の高い無接点保護回路を提供することがで
き、産業上有益なものである。Effects of the Invention As described above, it is possible to provide a low-cost and highly reliable non-contact protection circuit as a protection circuit for an automobile power window actuator through which a large current flows, by combining the Curie point of a positive temperature coefficient thermistor and a parallel composite resistance. It is industrially useful.
第１図は本発明の基本回路構成図、第２図は正特性サー
ミスタの温度−抵抗値特性図、第３図はパワーウィンド
開閉作動時の電流を示す図、第４図は正特性サーミスタ
に過電流を流した時の電流−時間特性図、第５図は正特
性サーミスタ素子のキューリ点１３５℃、並列合成抵抗
０．１２５Ωの場合の８０℃でのパワーウィンド開閉作
動時の電流を示す図、第６図は本発明比較例の正特性サ
ーミスタ素子のキューリ点１１０℃、並列合成抵抗０．
１．２５Ωの場合の８０℃でのパワーウィンド開閉作動
時の電流を示す図である。
１：正特性サーミスタ
２ニアクチユニーターモーター
３：パワーウィンド開閉スイッチ
４：直流電源Figure 1 is a basic circuit configuration diagram of the present invention, Figure 2 is a temperature-resistance characteristic diagram of a positive temperature coefficient thermistor, Figure 3 is a diagram showing the current when the power window opens and closes, and Figure 4 is a diagram of the positive coefficient thermistor. Current-time characteristic diagram when overcurrent flows. Figure 5 shows the current during power window opening/closing operation at 80°C when the Curie point of the positive temperature coefficient thermistor element is 135°C and the parallel combined resistance is 0.125Ω. , and FIG. 6 shows a positive temperature coefficient thermistor element according to a comparative example of the present invention at a Curie point of 110°C and a parallel combined resistance of 0.
It is a figure which shows the electric current at the time of power window opening/closing operation at 80 degreeC in the case of 1.25Ω. 1: Positive characteristic thermistor 2 Near actuator motor 3: Power window open/close switch 4: DC power supply
Claims (1)
特性サーミスタを並列に配置し、並列接続した正特性サ
ーミスタとアクチュエーターモーターとを直列接続し、
正特性サーミスタのキューリ点をｙ、並列合成抵抗をＸ
としたとき、 １１０≦ｙ≦１６０ｙ≦３５７．１４ｘ＋７５．３６な
る関係を有することを特徴とする自動車のパワーウイン
ドアクチュエーター用保護回路。[Claims] A plurality of positive temperature coefficient thermistors having a Curie point of 110°C to 160°C are arranged in parallel, and the parallel-connected positive coefficient thermistors and an actuator motor are connected in series,
The Curie point of the positive temperature coefficient thermistor is y, and the parallel combined resistance is X
A protection circuit for a power window actuator of an automobile, characterized in that the following relationship holds: 110≦y≦160y≦357.14x+75.36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26695288A JPH082195B2 (en) | 1988-10-21 | 1988-10-21 | Protection circuit for automobile power window actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26695288A JPH082195B2 (en) | 1988-10-21 | 1988-10-21 | Protection circuit for automobile power window actuator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13856389A Division JPH02114886A (en) | 1989-05-31 | 1989-05-31 | Protective device for power window actuator of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02114885A true JPH02114885A (en) | 1990-04-26 |
| JPH082195B2 JPH082195B2 (en) | 1996-01-10 |
Family
ID=17437970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26695288A Expired - Fee Related JPH082195B2 (en) | 1988-10-21 | 1988-10-21 | Protection circuit for automobile power window actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082195B2 (en) |
-
1988
- 1988-10-21 JP JP26695288A patent/JPH082195B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH082195B2 (en) | 1996-01-10 |
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