JPS5917893A - Control device for motor - Google Patents
Control device for motorInfo
- Publication number
- JPS5917893A JPS5917893A JP57126575A JP12657582A JPS5917893A JP S5917893 A JPS5917893 A JP S5917893A JP 57126575 A JP57126575 A JP 57126575A JP 12657582 A JP12657582 A JP 12657582A JP S5917893 A JPS5917893 A JP S5917893A
- Authority
- JP
- Japan
- Prior art keywords
- gain
- speed
- plate thickness
- circuit
- signal
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、垂下特性を有する電動機制御装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor control device having drooping characteristics.
第１図は、自動板厚制卸を有する冷間圧延装置を示す。FIG. 1 shows a cold rolling mill with automatic plate thickness control.
図において（１）は、巻戻機で、との巻戻機（１）から
巻戻された金属帯（２）は入側誘導ロール（３）を経由
してＮｏ、１スタンド圧延台（４）に入り、圧延効果に
よって板厚が減ぜられ、次いでＮｏ、２スタンド圧延台
（５）に入り、ここでも更に圧延効果によって板厚が減
ぜられて所望の板厚となり、出側誘導ロール（６）を経
由して巻取機（７）に巻取られる。In the figure, (1) is an unwinding machine, and the metal strip (2) unwound from the unwinding machine (1) is passed through the entry side guide roll (3) to No. 1 stand rolling table (4). ), the plate thickness is reduced by the rolling effect, and then it enters the No. 2-stand rolling table (5), where the plate thickness is further reduced by the rolling effect to reach the desired plate thickness, and then the plate is transferred to the exit guide roll. (6) and is wound up by a winding machine (7).
（８）はＮｏ、１スタンド圧延台（４）を駆動する電動
機であり、この電動機（８）は回転数制御を行う電源装
置（９）によって給電される。すなわち、電動機（８）
に図示されていない回転数検出器を付属して回転数をフ
ィードバックさゼることにより、所望の回転数となるよ
うな制御が電源装置（９）によって行われる。No. 8 is an electric motor that drives the one-stand rolling table (4), and this electric motor (8) is powered by a power supply device (9) that controls the rotation speed. That is, electric motor (8)
By attaching a rotation speed detector (not shown) and feeding back the rotation speed, the power supply device (9) performs control to obtain a desired rotation speed.
この制御により、Ｎｏ、１スタンド圧延台（４）を抜け
る金属帯（２）の速度が制御される。Ｎｏ、２スタンド
圧延台（５）に対しても図示されない同様の回路が装備
されており、同様の駆動制御が行なわれる。Through this control, the speed of the metal strip (2) passing through the No. 1 stand rolling table (4) is controlled. The No. 2-stand rolling table (5) is also equipped with a similar circuit (not shown), and similar drive control is performed.
従って、Ｎｏ、１スタンド圧延台（４）およびＮｏ、２
スタンド圧延台（５）は共に速度制御方式にて駆動され
る。Therefore, No. 1 stand rolling table (4) and No. 2
Both stand rolling tables (5) are driven by a speed control system.
そして、Ｎｏ、２スタンド圧延台（５）の出口側にて金
属帯（２）が正確に所望の板厚になることを監視するた
めに、厚み計００が設置される。この厚み計Ｏｄは設定
値である所望の目標板厚値と、計測値である金属帯（２
）の厚みとの差、すなわち板厚側差信Ｐｒ０３）を発生
する。この板厚偏差信号０υは自動板厚制御装置θのに
入力される。A thickness gage 00 is installed on the exit side of the No. 2-stand rolling table (5) to monitor that the metal strip (2) has exactly the desired thickness. This thickness gauge Od has a desired target plate thickness value which is a set value, and a metal band (2) which is a measured value.
), that is, a plate thickness side difference signal Pr03) is generated. This plate thickness deviation signal 0υ is input to the automatic plate thickness control device θ.
自動板厚制御装置＠は、板厚偏差信号ｏ］）を入力する
Ｐ、 ＰＩまたはＰＩＤ形制御器であり、この出力ｏ３
は前記Ｎｏ、１スタンド圧延台（４）の電源装置（９）
へ入力される。The automatic plate thickness control device @ is a P, PI or PID type controller that inputs the plate thickness deviation signal o]), and this output o3
is the power supply device (9) of the No. 1 stand rolling table (4).
is input to.
又、垂下特性連動信号（１４）は自動板厚制御袋ｆｉｆ
（１２のゲインと電源装置（９）の垂下特性回路のゲイ
ンを連動されるものであり、所望の垂下特性が得らねる
ような構成になっている。In addition, the drooping characteristic interlocking signal (14) is the automatic board thickness control bag fif
(The gain of 12 and the gain of the droop characteristic circuit of the power supply device (9) are linked, and the configuration is such that the desired droop characteristic cannot be obtained.
第２図は、前記第１図の電、源装置（９）及び自動板厚
制御装置ｏ２の信号受渡し部分を詳細に記載したもので
あって、Ｍ中ハッチンクで囲んだものが自動板厚制御装
置（２）と電源装置（９）の一部、すなわち速度制御機
能の部分とを示す。Fig. 2 shows in detail the signal delivery part of the electric power supply device (9) and the automatic plate thickness control device o2 in Fig. 1, and the hatched area in M indicates the automatic plate thickness control. The device (2) and part of the power supply device (9), ie, the part with the speed control function are shown.
第２図において、２１）はＰ形（もしくはＰＩ、 ＰＩ
Ｄ形）制御器、（１２１）〜（１２５）はリレー、（１
２１ａ’１〜（＋２５ａ）はそわぞれＲ７ｌ記リレー（
１２１）〜（１２５）に対応したａ接点を示す。従って
、一点鎖線内の回路（１２０）はリレー（１２１）〜（
１２５）の何ねかの選択に従って制卸ゲイン６１〜Ｇ５
の変化の生ずるゲイン変更回路であり、電源装置（９）
より何れか一つが与えられる信号（１４−１）〜（１４
−５）により変更が行われる。この信号（１４−１）〜
（１４−５）が、第１図において符号０４）で総称して
示したものである。In Figure 2, 21) is P type (or PI, PI
D type) controller, (121) to (125) are relays, (1
21a'1~(+25a) are the relays written in R7l (
121) to (125) are shown. Therefore, the circuit (120) within the dashed line is the relay (121) to (
Control gain 61 to G5 according to some selection in 125)
It is a gain change circuit that causes a change in the power supply device (9).
Signals (14-1) to (14-14) to which one of the signals is given
-5) changes are made. This signal (14-1) ~
(14-5) are collectively indicated by the reference numeral 04) in FIG.
前記信号（１４−１）〜（１４−５）の源は、第２図に
おける信号（１０１，）〜（１０５）である。この信号
源は図示しないが、圧延操作条件に基いて操作者もしく
は制御用計算機により設定され与えられる。信号（ｔｏ
ｔ）−（ｔｏ５）は電源装置（９）内においてリレー（
１１１）〜（１１５）を励磁し、従って接点（ｌｌｌａ
）〜（１１５ａ）の何れかが導通する。The sources of the signals (14-1) to (14-5) are the signals (101,) to (105) in FIG. Although this signal source is not shown, it is set and given by the operator or the control computer based on the rolling operation conditions. signal (to
t)-(to5) is the relay (
111) to (115), and therefore contacts (lla
) to (115a) are electrically connected.
従って、一点鎖線内の回路（ｉｔｏ）はゲインに１〜に
５変更回路である。Therefore, the circuit (ito) within the dashed line is a circuit that changes the gain from 1 to 5.
又、００は基準速度発生回路、０擾は速度制御器、（至
）は速度検出信号、０Φは垂下率演算回路、（４］）は
電流制御器、０２は電流検出信号をそれぞれ示す。Further, 00 indicates a reference speed generation circuit, 0 澾 indicates a speed controller, (to) indicates a speed detection signal, 0Φ indicates a drooping rate calculation circuit, (4) indicates a current controller, and 02 indicates a current detection signal.
以下、自動板厚制御の動作を、前記自動板厚制御装置θ
のがＰ形制御器である場合について説明する。いま、板
厚偏差信号０］）の極性が負符号であるとする。すなわ
ち、この場合はＮｏ、２スタンド圧延台（５）の出口側
における金属帯（２）の板厚が所望の板厚よりも小さい
。この場合、板厚制御装置０邊の出力０３は正符号、す
なわちＮｏ、１スタンド圧延台（４）の速度を増加させ
る方向の制卸信号である。従って、Ｎｏ、１スタンド圧
延台（４）の速度は増加し、Ｎｏ、２スタンド圧延台（
５）の速度は一定であるから、両圧延台（４）、（５）
間における金属帯（２）の張力は減少する。このことは
、圧延現象上、Ｎｏ、２スタンド圧延台（５）の出口側
における金属帯（２）の厚み増加につながる。この結果
、板厚偏差信号０１）は零に近づいて行き、所望の板厚
が得られることになる。Below, the operation of automatic plate thickness control will be explained using the automatic plate thickness control device θ.
The case where the controller is a P-type controller will be explained. Assume now that the polarity of the plate thickness deviation signal 0]) is a negative sign. That is, in this case, No. The thickness of the metal strip (2) on the exit side of the two-stand rolling table (5) is smaller than the desired thickness. In this case, the output 03 of the plate thickness control device 0 has a positive sign, that is, No, and is a control signal in the direction of increasing the speed of the 1-stand rolling table (4). Therefore, the speed of No. 1-stand rolling table (4) increases, and the speed of No. 2-stand rolling table (4) increases.
Since the speed of 5) is constant, both rolling tables (4) and (5)
The tension in the metal strip (2) between them decreases. This leads to an increase in the thickness of the metal strip (2) on the exit side of the two-stand rolling table (5) due to rolling phenomena. As a result, the plate thickness deviation signal 01) approaches zero, and the desired plate thickness is obtained.
前記説明は自動板厚制御装置ａのがＰ形制御器の場合で
あったが、ＰＩもしくはＰＩＤ形であっても前記の制御
動作は同様である。たたし、定常偏差を零にする目的で
ＰＩ形が使用され、 またＮｏ、２スタンド圧延台（５
）と厚み計００との間に発生する検出むだ時間おくれを
補償する目的でＤ形要素が付加されるのである。Although the above description has been made for the case where the automatic plate thickness control device a is a P-type controller, the above-mentioned control operation is the same even if it is a PI or PID type. However, the PI type is used for the purpose of reducing the steady-state deviation to zero, and the No. 2-stand rolling table (5
) and the thickness gauge 00 to compensate for the detection dead time delay.
従って、電源装置（９）の行う速度制卸は、制御出力０
３に完全に追随して速度を変更する制御性能が要請され
る。Therefore, the speed control performed by the power supply device (9) has a control output of 0.
Control performance is required to change the speed completely following the speed of 3.
ところが、一般には前記要請は満足されない。However, the above requirements are generally not met.
何故なら、前記の速度制御系内には自動板厚制御系と独
立した垂下特性が存在するからである。This is because the speed control system has a drooping characteristic that is independent of the automatic plate thickness control system.
例えは、第１図の場合は自動板厚制御装置（イ）が本来
出力すべき値△Ｎをそのまま出方すると過制御となって
しまう。第２図のゲイン変更回路（１２０）はこの補正
のために設けたものであり、電源装置（９）の内部にて
信号（１，０１）〜（１０５）によって選択される垂ド
持性に連動して自動板厚制御側のゲインを補正し常に最
適なループゲインにおいて自動板厚制御が動作するよう
に決められる。For example, in the case of FIG. 1, if the automatic plate thickness control device (a) directly outputs the value ΔN that it should output, overcontrol will result. The gain change circuit (120) shown in FIG. 2 is provided for this correction, and is based on the voltage retention characteristics selected by the signals (1,01) to (105) inside the power supply (9). In conjunction with this, the gain on the automatic plate thickness control side is corrected so that the automatic plate thickness control always operates at the optimum loop gain.
従って、速度制縄系の持つ垂下特性の如何にかかわらず
、正確に自動板厚制御を行うことができる。つまり、第
２図において、回路ｅＬ−（ｔｔｏ）の垂下特性回路の
動作は、電流基準信号、すなわち回路Ｏａの出力が増え
れば、回路（１１０）を経由して速度基準信号を減らす
から、負荷の増大とともに速度の減少が発生するものと
説明される。そして、その速度減少の度合い、すなわち
垂下特性の変更が回路（１１０）におけるゲイン変更に
より行いうるので、信号（１０１）〜（１０５）を操業
条件に照らして選択することにより所望の垂下特性が得
られるのである。Therefore, automatic plate thickness control can be performed accurately regardless of the drooping characteristics of the speed control system. In other words, in FIG. 2, the operation of the droop characteristic circuit of the circuit eL-(tto) is such that as the current reference signal, that is, the output of the circuit Oa increases, the speed reference signal decreases via the circuit (110), so the load It is explained that a decrease in speed occurs with an increase in . Since the degree of speed reduction, that is, the drooping characteristic, can be changed by changing the gain in the circuit (110), the desired drooping characteristic can be obtained by selecting the signals (101) to (105) in light of the operating conditions. It will be done.
前述のように従来の垂下特性制御装置は接点で垂下特性
のゲインを切替えており、又、垂下量はゲイン１こ比例
するので垂下量がゲインを切替えた瞬間には不連続とな
り結果として速度基準値が急変したことと同等となり圧
延機の速度に外乱として働くという欠点があった。As mentioned above, the conventional droop characteristic control device switches the gain of the droop characteristic using a contact point, and since the amount of droop is proportional to 1 gain, the amount of droop becomes discontinuous at the moment the gain is switched, and as a result, the speed standard This is equivalent to a sudden change in the value, which has the disadvantage of acting as a disturbance to the speed of the rolling mill.
この発明は、上記のような従来のものの欠点を除去する
ためになされたもので、垂下特性のゲインを時間的にな
めらかに変化させること１こ上り、垂下特性のゲインを
変えること１こよって生じる電動機速度の急変を減少さ
せることを目的としている。This invention was made in order to eliminate the drawbacks of the conventional ones as described above. The purpose is to reduce sudden changes in motor speed.
以下、この発明の一実施例を図について説明する。第８
図は、第２図に対応して制御部分を描いたものであって
、（至）は垂下特性のゲイン変化をなめらかに変化させ
るために設けらオ］た一次遅れ回路である。An embodiment of the present invention will be described below with reference to the drawings. 8th
The figure depicts a control section corresponding to FIG. 2, and (to) is a first-order delay circuit provided to smoothly change the gain change of the drooping characteristic.
速度制御の垂下特性が急変することは、前述のごとく速
度の急変を伴う。A sudden change in the drooping characteristic of speed control is accompanied by a sudden change in speed as described above.
その理由を第４図で説明する。The reason for this will be explained with reference to FIG.
第４図は、横軸１こ負荷■７、縦軸に速度Ｎをとって垂
下特性を有する場合の負荷−速度特性を描いたものであ
る。FIG. 4 depicts the load-speed characteristic in the case of having drooping characteristics, with the horizontal axis representing the load 7 and the vertical axis representing the speed N.
直線（ａ）は垂下特性のケインが０１のとき、直線（１
））はゲインが６２の吉きのそれぞれの負荷と速度との
関係を示したものである。Straight line (a) is straight line (1
)) shows the relationship between each load and speed for a gain of 62.
今、定格負傭（ＬＯ）で運転したときのそれぞれのゲイ
ンに対する垂下量をｄｌｄ２とすれば、負荷（Ｌ）で運
転しているとき垂下特性のゲインが０１から６２へ変化
すれは速度の変化社ΔＮは、
で表わされる。したがって垂下特性のゲインを変化させ
て垂下量を急変させねば速度も急変することになる。Now, if the amount of droop for each gain when operating at rated load (LO) is dld2, when the gain of the droop characteristic changes from 01 to 62 when operating at load (L), the change in speed is The company ΔN is expressed as follows. Therefore, unless the amount of droop is suddenly changed by changing the gain of the droop characteristic, the speed will also change suddenly.
速度の急変は、金属帯および圧延ロールへのきすの発生
、金属帯の破断、金属帯の板厚変動等の観点から好まし
くない。Sudden changes in speed are unfavorable from the viewpoints of occurrence of scratches on the metal strip and rolling rolls, breakage of the metal strip, changes in the thickness of the metal strip, and the like.
第８図における一次遅れ回路（至）は、これらを緩和す
るために設けられたものであり、ゲインが急変しても垂
下特性がなめらかに変化するようにしている。従って上
記実施例によれば垂下特性のゲインが急変しても速度を
急変させることなく電動機の速度制御を行うことができ
る。The first-order delay circuit (to) in FIG. 8 is provided to alleviate these problems, and allows the drooping characteristics to change smoothly even if the gain changes suddenly. Therefore, according to the above embodiment, even if the gain of the drooping characteristic changes suddenly, the speed of the motor can be controlled without causing a sudden change in speed.
なお、上記実施例ではゲインの急変を防止するために一
次遅れ回路■を用いたが、変わりにランプ関数のような
なめらかに変化する関数発生回路であれば何でもよい。In the above embodiment, the first-order lag circuit (2) was used to prevent sudden changes in gain, but any function generating circuit that changes smoothly, such as a ramp function, may be used instead.
又実施例では板厚制御装置を用いて説明したが、速度制
御の垂下特性のゲインを切替えているものであれば本装
置を同様に適用できる。Although the embodiment has been described using a plate thickness control device, the present device can be similarly applied to any device in which the gain of the drooping characteristic of speed control is switched.
以上のようにこの発明によれば、垂下特性のゲインを急
変させても、付加された一次遅れ回路を設けたため速度
の急変をおさえられることができ、例えば板厚制御装置
に本発明を適用すれば、金属帯および圧延ロールへのき
ず発生の防止、金属帯の破断および板厚変動防止などの
効果がある。As described above, according to the present invention, even if the gain of the droop characteristic is suddenly changed, the sudden change in speed can be suppressed by providing the additional first-order delay circuit.For example, the present invention can be applied to a plate thickness control device. For example, it has the effect of preventing the occurrence of scratches on the metal strip and rolling rolls, preventing breakage of the metal strip, and preventing variations in plate thickness.
第１図は従来の板厚制御装置の簡略ブロック図、第２図
は第２図は第１図の信号受は渡し部分を詳細に示すブロ
ック図、第８図は本発明の一実施例を示す信号の受渡し
部分の詳細ブロック図、第４図は垂下特性の説明図であ
る。
（１）巻戻機 （２）・・・金属帯（３）入側
誘導ロール （４） −Ｎｏ、１スタンド圧延台（５）
−Ｎｏ、２スタンド圧延台
（６）出側誘導ロール （７）・・巻取機（８）駆動電
動機 （９） 電源装置Ｑｄ 厚み言１
←９ 板厚偏差信号０■ 自動板厚制御装置０３
自動板厚制御信号０荀 垂下特性連動信号
（１４−１）〜（１４シ）同上
２１） 制御器 ｃ３］）基準速度信号発生回
路０→・速度制御器 （ト）・速度検出信号（ロ）
垂下率演算回路 （至）−次おくれ回路ＣＩ） 電流
制御器 （６）・・・電流検出信号（１０１）〜（
１０５） 垂下特性選択信号（１１０） ゲイン変
更回路 （１１１）〜（１１５） リレー（ｕｔａ）
〜（ｔｉ５ａ）−同上ａ接点（１２０）・ゲイン変更
回路 （１２１）倒１２５）・リレー（１２１ａ） 〜
（１２５ａ） ・同上ａ接点なお、図中、同一符号は同
一、または相当部分を示す。
代 理 人 葛 野 信 −
第１図Fig. 1 is a simplified block diagram of a conventional plate thickness control device, Fig. 2 is a block diagram showing in detail the signal receiver and transfer portion of Fig. 1, and Fig. 8 is a block diagram showing an embodiment of the present invention. FIG. 4 is a detailed block diagram of the signal transfer portion shown in FIG. 4, and is an explanatory diagram of the drooping characteristic. (1) Rewinding machine (2)...Metal strip (3) Inlet guide roll (4) -No., 1-stand rolling table (5)
-No, 2-stand rolling table (6) Output guide roll (7)... Winding machine (8) Drive motor (9) Power supply device Qd Thickness 1
←9 Plate thickness deviation signal 0■ Automatic plate thickness control device 03
Automatic plate thickness control signal 0 Droop characteristic interlocking signal (14-1) to (14) Same as above 21) Controller c3]) Reference speed signal generation circuit 0 → Speed controller (G) Speed detection signal (B)
Drooping rate calculation circuit (To) - Next delay circuit CI) Current controller (6)...Current detection signal (101) ~ (
105) Drooping characteristic selection signal (110) Gain change circuit (111) to (115) Relay (uta)
~(ti5a) - Same as above A contact (120)・gain change circuit (121) down 125)・relay (121a) ~
(125a) ・Same a contact as above In the figures, the same reference numerals indicate the same or equivalent parts. Agent Shin Kuzuno - Figure 1
Claims (1)
のゲインを切替える装置と、その切替えられたゲインを
暫時的に変化させる装置とからなる速度垂下率演算装置
、この速度垂下率演算装置の演算する速度垂下率に従っ
て、電動機を速度制御する速度制御器を備え、速度垂下
率を円滑に変化させることを特徴とする電動機制御装置
。A speed droop rate calculation device comprising a device for calculating the speed droop rate of an electric motor, a device for switching the gain of the speed droop rate, and a device for temporarily changing the switched gain; An electric motor control device comprising a speed controller that controls the speed of an electric motor according to a calculated speed droop rate, and smoothly changes the speed droop rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57126575A JPS5917893A (en) | 1982-07-16 | 1982-07-16 | Control device for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57126575A JPS5917893A (en) | 1982-07-16 | 1982-07-16 | Control device for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5917893A true JPS5917893A (en) | 1984-01-30 |
Family
ID=14938556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57126575A Pending JPS5917893A (en) | 1982-07-16 | 1982-07-16 | Control device for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5917893A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01318427A (en) * | 1988-05-06 | 1989-12-22 | Heidelberger Druckmas Ag | Method and apparatus for monitoring clock signal |
| US9851411B2 (en) | 2012-06-28 | 2017-12-26 | Keith S. Champlin | Suppressing HF cable oscillations during dynamic measurements of cells and batteries |
| US9923289B2 (en) | 2014-01-16 | 2018-03-20 | Midtronics, Inc. | Battery clamp with endoskeleton design |
| US9966676B2 (en) | 2015-09-28 | 2018-05-08 | Midtronics, Inc. | Kelvin connector adapter for storage battery |
| US10046649B2 (en) | 2012-06-28 | 2018-08-14 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US10222397B2 (en) | 2014-09-26 | 2019-03-05 | Midtronics, Inc. | Cable connector for electronic battery tester |
| US10317468B2 (en) | 2015-01-26 | 2019-06-11 | Midtronics, Inc. | Alternator tester |
| US10429449B2 (en) | 2011-11-10 | 2019-10-01 | Midtronics, Inc. | Battery pack tester |
| US10473555B2 (en) | 2014-07-14 | 2019-11-12 | Midtronics, Inc. | Automotive maintenance system |
| US10608353B2 (en) | 2016-06-28 | 2020-03-31 | Midtronics, Inc. | Battery clamp |
| US10843574B2 (en) | 2013-12-12 | 2020-11-24 | Midtronics, Inc. | Calibration and programming of in-vehicle battery sensors |
| US11054480B2 (en) | 2016-10-25 | 2021-07-06 | Midtronics, Inc. | Electrical load for electronic battery tester and electronic battery tester including such electrical load |
| US11325479B2 (en) | 2012-06-28 | 2022-05-10 | Midtronics, Inc. | Hybrid and electric vehicle battery maintenance device |
| US11474153B2 (en) | 2019-11-12 | 2022-10-18 | Midtronics, Inc. | Battery pack maintenance system |
| US11486930B2 (en) | 2020-01-23 | 2022-11-01 | Midtronics, Inc. | Electronic battery tester with battery clamp storage holsters |
| US11513160B2 (en) | 2018-11-29 | 2022-11-29 | Midtronics, Inc. | Vehicle battery maintenance device |
| US11545839B2 (en) | 2019-11-05 | 2023-01-03 | Midtronics, Inc. | System for charging a series of connected batteries |
| US11650259B2 (en) | 2010-06-03 | 2023-05-16 | Midtronics, Inc. | Battery pack maintenance for electric vehicle |
| US11668779B2 (en) | 2019-11-11 | 2023-06-06 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US11740294B2 (en) | 2010-06-03 | 2023-08-29 | Midtronics, Inc. | High use battery pack maintenance |
| US11973202B2 (en) | 2019-12-31 | 2024-04-30 | Midtronics, Inc. | Intelligent module interface for battery maintenance device |
-
1982
- 1982-07-16 JP JP57126575A patent/JPS5917893A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01318427A (en) * | 1988-05-06 | 1989-12-22 | Heidelberger Druckmas Ag | Method and apparatus for monitoring clock signal |
| US11740294B2 (en) | 2010-06-03 | 2023-08-29 | Midtronics, Inc. | High use battery pack maintenance |
| US11650259B2 (en) | 2010-06-03 | 2023-05-16 | Midtronics, Inc. | Battery pack maintenance for electric vehicle |
| US10429449B2 (en) | 2011-11-10 | 2019-10-01 | Midtronics, Inc. | Battery pack tester |
| US11325479B2 (en) | 2012-06-28 | 2022-05-10 | Midtronics, Inc. | Hybrid and electric vehicle battery maintenance device |
| US9851411B2 (en) | 2012-06-28 | 2017-12-26 | Keith S. Champlin | Suppressing HF cable oscillations during dynamic measurements of cells and batteries |
| US11926224B2 (en) | 2012-06-28 | 2024-03-12 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US10046649B2 (en) | 2012-06-28 | 2018-08-14 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US11548404B2 (en) | 2012-06-28 | 2023-01-10 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US10843574B2 (en) | 2013-12-12 | 2020-11-24 | Midtronics, Inc. | Calibration and programming of in-vehicle battery sensors |
| US9923289B2 (en) | 2014-01-16 | 2018-03-20 | Midtronics, Inc. | Battery clamp with endoskeleton design |
| US10473555B2 (en) | 2014-07-14 | 2019-11-12 | Midtronics, Inc. | Automotive maintenance system |
| US10222397B2 (en) | 2014-09-26 | 2019-03-05 | Midtronics, Inc. | Cable connector for electronic battery tester |
| US10317468B2 (en) | 2015-01-26 | 2019-06-11 | Midtronics, Inc. | Alternator tester |
| US9966676B2 (en) | 2015-09-28 | 2018-05-08 | Midtronics, Inc. | Kelvin connector adapter for storage battery |
| US10608353B2 (en) | 2016-06-28 | 2020-03-31 | Midtronics, Inc. | Battery clamp |
| US11054480B2 (en) | 2016-10-25 | 2021-07-06 | Midtronics, Inc. | Electrical load for electronic battery tester and electronic battery tester including such electrical load |
| US11513160B2 (en) | 2018-11-29 | 2022-11-29 | Midtronics, Inc. | Vehicle battery maintenance device |
| US11545839B2 (en) | 2019-11-05 | 2023-01-03 | Midtronics, Inc. | System for charging a series of connected batteries |
| US11668779B2 (en) | 2019-11-11 | 2023-06-06 | Midtronics, Inc. | Hybrid and electric vehicle battery pack maintenance device |
| US11474153B2 (en) | 2019-11-12 | 2022-10-18 | Midtronics, Inc. | Battery pack maintenance system |
| US11973202B2 (en) | 2019-12-31 | 2024-04-30 | Midtronics, Inc. | Intelligent module interface for battery maintenance device |
| US11486930B2 (en) | 2020-01-23 | 2022-11-01 | Midtronics, Inc. | Electronic battery tester with battery clamp storage holsters |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5917893A (en) | Control device for motor | |
| KR870001108B1 (en) | Method for starting the operation of a loom | |
| US2432876A (en) | Control system | |
| US2586412A (en) | Control system for dynamoelectric machines | |
| US2011653A (en) | Control system | |
| US2339939A (en) | Control system | |
| US2451901A (en) | Control system for reel motors | |
| JPS60148863A (en) | Control of reel tention | |
| US2512378A (en) | Control system for direct-current motors | |
| US3384796A (en) | Strip break control to stop drive motors | |
| JPS5916614A (en) | Controlling device of sheet thickness | |
| JP3289754B2 (en) | Winding and rewinding control device by static tension of inverter driven motor | |
| US4448366A (en) | Coil diameter tracking system and tension regulation system using such tracking system | |
| US2508154A (en) | Tension control system | |
| JP7253664B1 (en) | Judgment method and voltage regulator | |
| US2757325A (en) | Electric motor control system for tensioning material | |
| JPH11187574A (en) | Power-factor control equipment of power station | |
| JPS599723A (en) | Electric power control device | |
| JPH0824921A (en) | Method for starting tandem rolling mill of metal strip and its control device | |
| Gaines | Electrical equipment for a high-speed aluminum rolling mill | |
| JP2000357017A (en) | Slide type automatic voltage regulator | |
| US2985815A (en) | Speed regulator for motor driven generators | |
| JPS6243610Y2 (en) | ||
| JPS56122608A (en) | Loop controller for hot strip continuous rolling mill | |
| JPS6055879A (en) | Secondary side winding slip controlling method of wound-rotor type generator motor |