JPH07119595A - Controller for start of motor - Google Patents
Controller for start of motorInfo
- Publication number
- JPH07119595A JPH07119595A JP26688393A JP26688393A JPH07119595A JP H07119595 A JPH07119595 A JP H07119595A JP 26688393 A JP26688393 A JP 26688393A JP 26688393 A JP26688393 A JP 26688393A JP H07119595 A JPH07119595 A JP H07119595A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- temp
- electric motor
- temperature
- current
- 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
Landscapes
- Control Of Electric Motors In General (AREA)
- Motor And Converter Starters (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、電動機とその始動器か
ら構成される電気設備における電動機の好適な始動制御
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suitable starting control device for an electric motor in an electric equipment composed of the electric motor and its starter.
【0002】[0002]
【従来の技術】インチング運転仕様の如き特殊電動機を
除き、一般電動機は冷機状態で連続二回,熱時状態で一
回の始動が可能なように設計されているのが大半であり
冷機状態か,熱時状態かは、製造者が提示する必要冷却
時間(停止時間)の目安を基にして運転員が判断してい
るため電動機の運転状態に応じた温度を的確に把握した
運転制御を行うことは実施されておらず不必要に冷却時
間を長くとったり、その逆に冷却時間が短いために電動
機を焼損させる等の問題があった。2. Description of the Related Art Except for special motors such as inching operation specifications, most general electric motors are designed to be able to start twice in a cold state and once in a hot state. , Operating control is performed by accurately grasping the temperature according to the operating state of the motor, because the operator judges whether it is in the hot state based on the standard of the required cooling time (stop time) presented by the manufacturer. However, there is a problem that the cooling time is unnecessarily lengthened, and conversely, the cooling time is short and the electric motor is burnt out.
【0003】[0003]
【発明が解決しようとする課題】電動機の温度計測は測
温抵抗体等の使用によっても可能であるが、これらの計
測は時定数のために温度変化を即座に計測できず始動制
御の条件に使用することはできない。又電動機自体にこ
れを埋め込む必要があるため電動機が特殊設計となる欠
点がある。Although it is possible to measure the temperature of an electric motor by using a resistance temperature detector or the like, these measurements cannot be immediately measured due to the time constant, so that the conditions for starting control cannot be met. It cannot be used. In addition, there is a drawback that the electric motor has a special design because it needs to be embedded in the electric motor itself.
【0004】[0004]
【課題を解決するための手段】電動機温度を運転と停止
の各々の時間と電動機電流より演算し、電動機の種別毎
に定められた許容温度と、もう一度始動した場合の温度
上昇を予測演算した結果を比較し、電動機が始動可能な
温度以下であるか否かを判別して電動機の始動制御を行
う。[Means for Solving the Problems] Results of predictive calculation of an electric motor temperature from operating and stopping times and an electric motor current, and an allowable temperature determined for each type of electric motor and a temperature rise when starting again. Are compared to determine whether or not the temperature is equal to or lower than the temperature at which the electric motor can be started, and start control of the electric motor is performed.
【0005】[0005]
【作用】本発明では、電動機の温度上昇許容値から制約
される電動機始動制御を的確かつ確実に行うことができ
る。According to the present invention, the electric motor starting control which is restricted by the allowable temperature rise value of the electric motor can be accurately and surely performed.
【0006】[0006]
【実施例】以下本発明の実施例を図1と図2に示す。Embodiments of the present invention are shown in FIGS. 1 and 2.
【0007】図1は電源設備と始動制御装置の構成図を
示す。FIG. 1 is a block diagram of a power supply facility and a start control device.
【0008】計器用変流器15で検出された電動機電流
はアナログ/デジタル変換器2に接続されその出力は始
動電流/始動時間検出器3と温度上昇演算器4に入力さ
れる。始動開閉器14の閉接点と電動機の種別等によっ
て異なる定数を設定するための定数設定器5の出力も温
度上昇演算器4に入力される。The motor current detected by the instrument current transformer 15 is connected to the analog / digital converter 2, and its output is input to the starting current / starting time detector 3 and the temperature rise calculator 4. The output of the constant setter 5 for setting a constant that differs depending on the closed contact of the start switch 14 and the type of the electric motor is also input to the temperature rise calculator 4.
【0009】始動開閉器の開接点と定数設定器5の出力
は温度下降演算器6に入力される。温度上昇演算器4と
温度下降演算器6によって演算された温度は加算器7に
よって電動機温度が計算される。The open contact of the starting switch and the output of the constant setting device 5 are input to the temperature decrease calculator 6. With respect to the temperatures calculated by the temperature increase calculator 4 and the temperature decrease calculator 6, an adder 7 calculates the motor temperature.
【0010】加算器7の出力と始動電流/始動時間検出
器3の出力によって始動時の温度上昇を演算する予測演
算器8の出力は加算器9で加算され温度設定器10に入
力されて加算値と許容温度設定値を比較する。設定値以
下の場合には始動許可指令、設定値以上の場合は始動不
許可指令を出力することによって電動機16の始動制御
を行うことができる。The output of the predictive calculator 8 for calculating the temperature rise at the time of start by the output of the adder 7 and the output of the starting current / starting time detector 3 is added by the adder 9 and input to the temperature setter 10 to be added. Compare the value with the allowable temperature setting. When the value is less than or equal to the set value, the start permission command is output, and when the value is greater than or equal to the set value, the start non-permission command is output to control the start of the motor 16.
【0011】図2はインターロック図を示す。FIG. 2 shows an interlock diagram.
【0012】操作スイッチ17を入操作したとき始動制
御装置からの始動許可指令出力11が発信されていれば
開閉器14が投入されて電動機が始動でき始動不許可出
力12が発信されている場合には警報を出すなどして運
転員に注意を与える。When the start permission command output 11 from the start control device is transmitted when the operation switch 17 is turned on, when the switch 14 is closed and the motor can be started and the start non-permission output 12 is transmitted. Warns the operator by giving an alarm.
【0013】図3は電動機が始動した場合の温度上昇と
時間の関係の例を示す。FIG. 3 shows an example of the relationship between temperature rise and time when the electric motor is started.
【0014】冷機状態の電動機が始動した場合、始動電
流によって発生する熱で温度は急激に上昇するが始動完
了後に通常運転を継続することによって時間の経過と共
に温度は低下しやがて安定温度となる。又、熱機状態で
再始動した場合は冷機状態の温度より高くなると共に安
定温度にいたる迄の時間も長くなる。When the electric motor in the cold state is started, the temperature rapidly rises due to the heat generated by the starting current, but by continuing the normal operation after the completion of the start, the temperature gradually decreases and becomes a stable temperature. Further, when restarted in the hot machine state, the temperature becomes higher than that in the cold state and the time required to reach the stable temperature becomes longer.
【0015】温度上昇と降下の大きさは、電流と運転/
停止時間の積を基に求めることができる。The magnitude of the temperature rise and fall depends on the current and run /
It can be calculated based on the product of stop times.
【0016】[0016]
【発明の効果】本発明によれば、電動機の始動/停止の
繰返し等によって電動機の許容温度を超過するような温
度上昇をまねく不用意な操作を防止することができる。As described above, according to the present invention, it is possible to prevent an inadvertent operation that causes a temperature rise that exceeds the allowable temperature of the electric motor due to repeated start / stop of the electric motor.
【図1】電源設備と始動制御装置の構成図である。FIG. 1 is a configuration diagram of a power supply facility and a start control device.
【図2】電動機の操作インターロック図である。FIG. 2 is an operation interlock diagram of the electric motor.
【図3】電動機が始動した場合の温度上昇と時間の関係
を示す図である。FIG. 3 is a diagram showing a relationship between temperature rise and time when the electric motor is started.
1…始動制御装置、2…アナログ/デジタル変換器、3
…始動電流/始動時間検出器、4…温度上昇演算器、5
…定数設定器、6…温度下降演算器、7,9…加算器、
8…予測演算器、10…温度設定器、11…始動許可指
令出力、12…始動不許可出力、13…電源母線、14
…開閉器、15…計器用変流器、16…電動機。1 ... Starting control device, 2 ... Analog / digital converter, 3
… Starting current / starting time detector, 4… Temperature rise calculator, 5
... Constant setter, 6 ... Temperature decrease calculator, 7,9 ... Adder,
8 ... Prediction calculator, 10 ... Temperature setter, 11 ... Start permission command output, 12 ... Start non-permission output, 13 ... Power bus, 14
... Switch, 15 ... Current transformer for instrument, 16 ... Electric motor.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北見 英悦 茨城県日立市幸町三丁目2番1号 日立エ ンジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyoshi Kitami 3-2-1, Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi Engineering Co., Ltd.
Claims (1)
構成される電気設備において、電動機の運転と停止時間
及び電動機電流等を基にして算出される電動機温度と、
電動機の許容温度設定器との比較演算を行い、始動可能
か否かを判別し電動機の始動許可指令を発することを特
徴とした電動機始動制御装置。1. In an electric facility comprising an electric motor and a starter for starting the electric motor, the electric motor temperature calculated based on the electric motor operation and stop time, electric motor current, etc.,
An electric motor start control device, which performs a comparison calculation with an allowable temperature setter of an electric motor to determine whether the electric motor can be started and issues a start permission command for the electric motor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26688393A JPH07119595A (en) | 1993-10-26 | 1993-10-26 | Controller for start of motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26688393A JPH07119595A (en) | 1993-10-26 | 1993-10-26 | Controller for start of motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07119595A true JPH07119595A (en) | 1995-05-09 |
Family
ID=17436989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26688393A Pending JPH07119595A (en) | 1993-10-26 | 1993-10-26 | Controller for start of motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07119595A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003510523A (en) * | 1999-09-29 | 2003-03-18 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Electric starter device for internal combustion engine |
-
1993
- 1993-10-26 JP JP26688393A patent/JPH07119595A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003510523A (en) * | 1999-09-29 | 2003-03-18 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Electric starter device for internal combustion engine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5510687A (en) | Electric motor controller with temperature protection | |
CN100550559C (en) | Thermal overload protection equipment and method | |
US6294888B1 (en) | Frequent start protection and economizer control for a motor starter | |
US6424266B1 (en) | Apparatus for preventing thermal damage to an electrical power transformer | |
JP4362110B2 (en) | Motor overheat prevention system and method | |
US7161778B2 (en) | Rotor thermal model for use in motor protection | |
US20070121259A1 (en) | Thermal Overload Protection | |
US6727821B2 (en) | Apparatus and method for predicting an overload trip for an electrical power transformer | |
JPH09261850A (en) | Motor control device | |
JPH07119595A (en) | Controller for start of motor | |
US20060209480A1 (en) | Device and method for protecting an electric machine | |
JPH1189083A (en) | Motor controller | |
JPH11228043A (en) | Cooling controller for elevator control motor and recording medium recording cooling control program | |
JP2001289493A (en) | Control method for air conditioner | |
CN100539347C (en) | Thermal overload protection equipment and method | |
JPS62203578A (en) | Method for limiting start of induction motor | |
JPS60205562A (en) | Safety device in fixing device | |
JPH03135385A (en) | Method of protecting overheat of damping resistor | |
JPS61122469A (en) | Air cooling device | |
JPS6432919A (en) | Overheat preventing device | |
JPS5826592A (en) | Protecting system of variable speed motor from overloading | |
JP2873762B2 (en) | Room temperature controller for heater | |
KR970032587A (en) | Abnormal process control device and method for electric rice cooker | |
JPH10127061A (en) | Method for controlling power conversion device | |
JPH0216277Y2 (en) |