JPS63295385A - Safety device for elevator - Google Patents
Safety device for elevatorInfo
- Publication number
- JPS63295385A JPS63295385A JP62132712A JP13271287A JPS63295385A JP S63295385 A JPS63295385 A JP S63295385A JP 62132712 A JP62132712 A JP 62132712A JP 13271287 A JP13271287 A JP 13271287A JP S63295385 A JPS63295385 A JP S63295385A
- Authority
- JP
- Japan
- Prior art keywords
- elevator
- speed
- command
- predetermined value
- control calculation
- 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
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明はブレーキ引きずり等による走行を検出し、ブ
レーキの焼付けを防止する手段を備えたエレベータの安
全装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a safety device for an elevator that is equipped with a means for detecting running due to brake drag or the like and preventing brake seizure.
［従来の技術］
第５図は例えば特開昭６０−２２８３７９号公報に示さ
れた従来のエレベータの安全装置を示すブロック線図で
、図において、（１）はエレベータのかご駆動用誘導電
動機（以下単に電動機という）、（２）はエレベータの
速度指令を発生する速度指令発生手段、（３）はエレベ
ータの実速度を検出する実速度検出手段、（４）はこれ
ら両手段（２） （３）からのエレベータの速度指令と
実速度との偏差により電動機（１）のトルク指令を演算
し出力する速度制御演算手段、（５）は速度制御演算手
段（４）からのトルク指令に基すいて電動機（１）駆動
用インバータ（図示されていない）への電流指令を発生
する電流指令手段、（６）は電流指令手段（５）によっ
て発生した電流指令の上限値を規定する電流指令制限手
段、（７）は速度制御演算手段（４）からのトルク指令
が所定値以上か否か判定する速度制御演算出力判定手段
、（８）は速度制御演算出力判定手段（７）によるトル
ク指令の所定値以上の判定が所定時間以上継続したゆ１
否かを判定する経過時間判別手段、（９）は経過時間判
別手段（８）による所定時間以上経過の判別に応じて電
動機（１）に急停止指令を与える急停止指令出力手段で
ある。[Prior Art] Fig. 5 is a block diagram showing a conventional elevator safety device disclosed in, for example, Japanese Unexamined Patent Publication No. 60-228379. In the figure, (1) is an induction motor for driving an elevator car ( (2) is a speed command generation means for generating a speed command for the elevator; (3) is an actual speed detection means for detecting the actual speed of the elevator; (4) is for both of these means (2) (3) ) speed control calculation means for calculating and outputting a torque command for the electric motor (1) based on the deviation between the elevator speed command from the elevator and the actual speed; Current command means (6) generates a current command to the electric motor (1) drive inverter (not shown); (6) current command limiting means defines the upper limit value of the current command generated by the current command means (5); (7) is a speed control calculation output determination means for determining whether the torque command from the speed control calculation means (4) is greater than or equal to a predetermined value, and (8) is a predetermined value of the torque command by the speed control calculation output determination means (7). If the above judgment continues for more than the specified time,
The elapsed time determining means (9) is a sudden stop command outputting means that gives a sudden stop command to the electric motor (1) in response to the elapsed time determining means (8) determining that a predetermined time or more has elapsed.
次に動作について説明する。エレベータ正常運転時には
、速度指令発生手段（２）によって発生した速度指令と
実速度検出手段（３）によって検出される電動機（１）
の実速度との偏差から速度制御演算手段（４）によって
トルク指令が演算され、このトルク指令に基ずいた電流
指令が電流指令手段（５）によって電動機（１）駆動用
インバータに与えられ、この電流によって電動機（１）
が運転制御される。Next, the operation will be explained. During normal elevator operation, the speed command generated by the speed command generation means (2) and the electric motor (1) detected by the actual speed detection means (3)
A torque command is calculated by the speed control calculation means (4) from the deviation from the actual speed, and a current command based on this torque command is given to the inverter for driving the electric motor (1) by the current command means (5). Electric motor (1) by current
is controlled.
今、エレベータがブレーキ状態のまま走行（以下ブレー
キ引きずりによる走行という）したとすると、電動機（
１）の所望トルクとしてはブレーキによるトルク分だけ
余分に必要となる。従って、速度制御演算手段（４）に
よって演算されるトルク指令も正常運転時に比べ大きく
なる。そのトルク増加に応じて電流指令手段（５）から
の電流指令も増加するが、電流指令制限手段（６）によ
って上限値が規定されているのでそれ以上増加せず、電
動機（１）はこの上限値の電流にて付勢される。一方、
上記トルク指令が所定の一定値（正常運転時の加速トル
ク相当値）以上となると速度制御演算出力判定手段（７
）が動作し、それが所定時間以上継続すると経過時間判
別手段（８）が動作し、急停止指令出力手段（９）が急
停止指令を出力してエレベータを急停止させ、ブレーキ
の焼付は等の事故を未然に防止する。Now, if the elevator runs with the brakes on (hereinafter referred to as running with brake dragging), the electric motor (
As for the desired torque in 1), an extra torque is required due to the brake. Therefore, the torque command calculated by the speed control calculation means (4) also becomes larger than during normal operation. In accordance with the increase in torque, the current command from the current command means (5) also increases, but since the upper limit value is defined by the current command limit means (6), it does not increase any further, and the electric motor (1) energized with a current of value. on the other hand,
When the torque command exceeds a predetermined constant value (acceleration torque equivalent value during normal operation), the speed control calculation output determination means (7
) operates, and if this continues for a predetermined time or more, the elapsed time determining means (8) operates, and the sudden stop command output means (9) outputs a sudden stop command to stop the elevator suddenly, preventing brake seizure. prevent accidents.
［発明が解決しようとする問題点］
従来のエレベータの安全装置は以上のように構成されて
いるので、ブレーキ引きずりによる走行は有効に検出さ
れるが、ブレーキ引きずりがない正常走行中でも電源電
圧が低下した場合は、電動機（１）の発生できるトルク
が低下し、エレベータの実速度は指令速度に比べ遅れが
大きくなる。そのため速度制御演算手段（４）の発生す
るトルク指令は正常電源時に比べ大きくなり所定の一定
値以上となり、速度制御演算出力判定手段（７）、経過
時間判別手段（８）が動作して急停止指令出力手段（９
）が急停止指令を出力する場合がある。エレベータの許
容電源変動は略−１５％で、この程度の電源変動ではエ
レベータを正常に運転することは可能であるが、この場
合上述のように急停止指令出力手段（９）が誤動作して
しまうという問題点があった・
この発明は上記のような問題点を解消するためになされ
たもので、ブレーキ引きずりによる走行はこれを確実に
検出してエレベータを停止させるが、許容範囲内の電源
電圧変動に対しては応動しないエレベータの安全装置を
得ることを目的とする。[Problems to be solved by the invention] Since the conventional elevator safety device is configured as described above, running due to brake dragging is effectively detected, but the power supply voltage may drop even during normal running without brake dragging. In this case, the torque that the electric motor (1) can generate decreases, and the actual speed of the elevator lags behind the commanded speed. Therefore, the torque command generated by the speed control calculation means (4) becomes larger than when the power supply is normal and exceeds a predetermined constant value, and the speed control calculation output determination means (7) and elapsed time determination means (8) operate to cause a sudden stop. Command output means (9
) may output a sudden stop command. The allowable power fluctuation for the elevator is approximately -15%, and although it is possible to operate the elevator normally with power fluctuations of this degree, in this case, the sudden stop command output means (9) will malfunction as described above. This invention was made in order to solve the above-mentioned problems.The invention reliably detects running due to brake dragging and stops the elevator, but if the power supply voltage is within the permissible range The purpose of this invention is to obtain a safety device for an elevator that does not respond to fluctuations.
［問題点を解決するための手段］
この発明に係るエレベータの安全装置は、上述の従来装
置に、速度制御演算出力判定手段がトルク指令の所定値
以上を検出した時点におけるエレベータの速度指令また
は実速度が所定値以下であることを検出するエレベータ
速度判定手段を新たに設け、このエレベータ速度判定手
段がエレベータ速度の所定値以下を検出し、かつ経過時
間判定手段が所定値以上のトルク指令の所定時間以上継
続を検出した時に、急停止指令出力手段を動作させるよ
うにしたものである。[Means for Solving the Problems] The elevator safety device according to the present invention adds to the above-mentioned conventional device the elevator speed command or actual output at the time when the speed control calculation output determination means detects the torque command to be equal to or higher than a predetermined value. Elevator speed determining means is newly provided to detect that the speed is below a predetermined value, and the elevator speed determining means detects that the elevator speed is below the predetermined value, and the elapsed time determining means detects the predetermined value of the torque command that is greater than or equal to the predetermined value. When the continuation for a period of time or more is detected, the sudden stop command output means is operated.
［作 用］
ブレーキ引きずりによる走行時のトルク指令は低い電動
機速度において所定の一定値以上となるが、電源電圧の
低下時のトルク指令はより高い電動機速度において急に
所定の一定値以上に上昇するので、この発明におけるエ
レベータの安全装置は、速度制御演算出力判定手段がト
ルク指令の所定値以上を検出した時点におけるエレベー
タの速度が判定され、それが所定値以上の時はブレーキ
引きずりによるトルク指令の上昇と判定され急停止指令
出力手段は動作し、所定値以下の時は電源電圧の低下時
のトルク指令の上昇と判定されて急停止指令出力手段は
動作しない。[Function] The torque command when driving due to brake drag is above a predetermined constant value at low motor speeds, but the torque command when the power supply voltage decreases suddenly rises above the predetermined constant value at higher motor speeds. Therefore, in the elevator safety device of the present invention, the speed of the elevator at the time when the speed control calculation output determining means detects a torque command of a predetermined value or more is determined, and when the speed is equal to or higher than a predetermined value, the torque command is determined by brake drag. If it is determined that the torque command has increased, the sudden stop command output means operates, and if it is less than a predetermined value, it is determined that the torque command has increased when the power supply voltage decreases, and the sudden stop command output means does not operate.
［実施例］
以下、この発明の一実施例を図について説明する。第１
図はこの発明の一実施例の全体構成を示すブロック線図
で、図において、（１）はエレベータのかご駆動用電動
機、（２）は速度指令発生手段、（３）は実速度検出手
段、（４）は速度制御演算手段、（５）は電流指令手段
、（６）は電流指令制限手段、（７）は速度制御演算出
力判定手段、（８）は経過時間判別手段で、以上は第５
図に示す従来例のものと同様のものである。（９）は経
過時間判別手段（８）による所定時間以上経過と後述の
エレベータ速度判定手段（１０）の判定結果に応じて電
動機（１）に急停止指令を与える急停止指令出力手段、
（１０）は速度制御演算出力判定手段（７）がトルク指
令の所定値以上を検出した時点におけるエレベータの速
度指令が所定値以下か否かを検出し、所定値以下の時急
停止指令出力手段（９）に信号を出力するエレベータ速
度判定手段である。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram showing the overall configuration of an embodiment of the present invention. In the figure, (1) is an electric motor for driving an elevator car, (2) is a speed command generation means, (3) is an actual speed detection means, (4) is speed control calculation means, (5) is current command means, (6) is current command limiting means, (7) is speed control calculation output determination means, and (8) is elapsed time determination means. 5
This is similar to the conventional example shown in the figure. (9) sudden stop command output means for giving a sudden stop command to the electric motor (1) in response to the elapse of a predetermined time or more by the elapsed time determining means (8) and the determination result of the elevator speed determining means (10) described below;
(10) is a means for detecting whether or not the elevator speed command is less than a predetermined value at the time when the speed control calculation output determining means (7) detects a torque command greater than or equal to a predetermined value, and outputting a sudden stop command when the speed command is less than the predetermined value. (9) is an elevator speed determination means that outputs a signal.
第２図〜第４図はこの実施例の動作説明用タイムチャー
トで、第２図は正常運転時、第３図は電源電圧低下時、
そして第４図はブレーキ引きずり時における速度特性（
ａ）及びトルク特性（ｂ）をそれぞれ示し、図において
、 （１１）は速度指令発生手段（２）が発生する速度
指令、（１２）は実速度検出手段（３）が検出する実速
度、（１３）はこれら両信号（１１）（１２）から速度
制御演算手段（４）によって演算されるトルク指令であ
る。Figures 2 to 4 are time charts for explaining the operation of this embodiment. Figure 2 is during normal operation, Figure 3 is when the power supply voltage drops,
Figure 4 shows the speed characteristics when the brake drags (
a) and torque characteristics (b), respectively, and in the figure, (11) is the speed command generated by the speed command generation means (2), (12) is the actual speed detected by the actual speed detection means (3), and ( 13) is a torque command calculated by the speed control calculation means (4) from these two signals (11) and (12).
炊、にこの実施例の動作を第２図〜第４図によって説明
する。エレベータ正常運転時には、第２図に示す速度指
令（１１）と実速度（１２）との偏差から速度制御演算
手段（４）によってトルク指令（１３）が演算され、こ
のトルク指令に基すいた電流指令が電流指令手段（５）
によって電動機（１）駆動用インバータに与えられ、こ
の電流によって電動機（１）が運転制御される。The operation of this embodiment will be explained with reference to FIGS. 2 to 4. During normal elevator operation, a torque command (13) is calculated by the speed control calculation means (4) from the deviation between the speed command (11) and the actual speed (12) shown in Fig. 2, and the current based on this torque command is calculated. The command is current command means (5)
is applied to the inverter for driving the electric motor (1), and the operation of the electric motor (1) is controlled by this current.
エレベータのブレーキ引きずり走行時には、第４図に示
すように、実速度（１２）は起動時より速度指令（１１
）に対し大巾に遅れ、トルク指令（１３）は起動時に近
い時点で急激に大きくなり所定値Ａを超え、この状態が
一定時間以上続く。即ち、速度制御演算出力判定手段（
７）が所定値Ａ以上のトルク指令（１３）を検出する時
点での速度指令（１１）の値は所定の一定時間以上であ
るので、エレベータ速度判定手段（１０）がこれを検出
して急停止指令出力手段（９）に信号を出力する。従っ
てこの状態が所定の一定時間以上続くと経過時間判別手
段（８）も動作して急停止指令出力手段（９）に信号を
出力するので、急停止指令出力手段（９）が動作し停止
指令を出力して電動機（１）を急停止させる。When the elevator runs with brake drag, the actual speed (12) changes from the time of startup to the speed command (11), as shown in Figure 4.
), the torque command (13) suddenly increases near the time of startup and exceeds the predetermined value A, and this state continues for a certain period of time or more. That is, the speed control calculation output determination means (
Since the value of the speed command (11) at the time when 7) detects the torque command (13) which is equal to or more than the predetermined value A is equal to or more than the predetermined fixed time, the elevator speed determination means (10) detects this and suddenly A signal is output to the stop command output means (9). Therefore, if this state continues for more than a predetermined period of time, the elapsed time determining means (8) also operates and outputs a signal to the sudden stop command output means (9), so the sudden stop command output means (9) operates and commands a stop. is output to suddenly stop the electric motor (1).
一方、電源電圧低下時には、第３図に示すように、エレ
ベータの実速度（１２）が所定値Ｂに達する迄は通常電
源時と何等変らなく、実速度（１２）が所定値Ｂ以上に
なって初めてエレベータの実速度（１２）が速度指令（
１１）に対し遅れ、トルク指令（１３）もこの時点で急
激に大きくなり所定値Ａを超える。On the other hand, when the power supply voltage drops, as shown in Figure 3, there is no difference from the normal power supply until the actual speed (12) of the elevator reaches the predetermined value B, and when the actual speed (12) exceeds the predetermined value B. Only after the actual speed (12) of the elevator becomes the speed command (
11), the torque command (13) also increases rapidly at this point and exceeds the predetermined value A.
従って、このトルク指令（１３）が所定値Ａを超える時
点におけるエレベータ速度指令（１１）は所定値Ｂ以上
で、エレベータ速度判定手段（１０）は動作せず出力し
ないので、急停止指令出力手段（９）は動 ′作しな
い。Therefore, at the time when this torque command (13) exceeds the predetermined value A, the elevator speed command (11) is greater than or equal to the predetermined value B, and the elevator speed determination means (10) does not operate and does not output, so the sudden stop command output means ( 9) does not work.
なお、この実施例におけるエレベータ速度判定手段（１
０）は、エレベータ速度指令（１１）が所定値Ｂ以上か
否かを判定しているが、エレベータの実速度（１２）が
所定値以上か否かを判定するようにしてもよい。It should be noted that the elevator speed determination means (1) in this embodiment
0), it is determined whether the elevator speed command (11) is equal to or greater than the predetermined value B, but it may be determined whether the actual speed of the elevator (12) is equal to or greater than the predetermined value.
［発明の効果コ
以上のように、この発明によればトルク指令が所定値以
上のなった時点におけるエレベータの速度指令または実
速度が所定値以下の時のみ急停止指令出力手段を動作さ
せるようにしたので、許容範囲内の電源電圧変動に対し
ては応動しないが、ブレーキ引きずりによる走行時には
確実に応答してエレベータを停止させることができ、信
頼性の高いエレベータの安全装置が得られ効果がある。[Effects of the Invention] As described above, according to the present invention, the sudden stop command output means is operated only when the speed command or actual speed of the elevator at the time when the torque command exceeds a predetermined value is below a predetermined value. Therefore, although it does not respond to power supply voltage fluctuations within the permissible range, it can reliably respond and stop the elevator when the elevator is running due to brake drag, resulting in a highly reliable elevator safety device that is effective. .
第１図はこの発明の一実施例の全体構成を示すブロック
線図、第２図、第３図、第４図はこの実施例の動作説明
用タイムチャート、第５図は従来のエレベータの安全装
置を示すブロック線図である。図において、（１）はエ
レベータのかご駆動用電動機、（２）は速度指令発生手
段、（３）は実速度検出手段、（４）は速度制御演算手
段、（５）は電流指令手段、（６）は電流指令制限手段
、（７）は速度制御演算出力判定手段、（８）は経過時
間判別手段、（９）は急停止指令出力手段、 （１０）
はエレベータ速度判定手段、 （１１）はエレベータ速
度指令＋ （１２）はエレベータの実速度、（１３）は
トルク指令である。
なお１図中同一筒号は同−或は相当部分を示す。Fig. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, Figs. 2, 3, and 4 are time charts for explaining the operation of this embodiment, and Fig. 5 is a safety diagram of a conventional elevator. FIG. 2 is a block diagram showing the device. In the figure, (1) is an electric motor for driving an elevator car, (2) is a speed command generation means, (3) is an actual speed detection means, (4) is a speed control calculation means, (5) is a current command means, ( 6) is current command limiting means, (7) is speed control calculation output determining means, (8) is elapsed time determining means, (9) is sudden stop command output means, (10)
is the elevator speed determination means, (11) is the elevator speed command + (12) is the actual speed of the elevator, and (13) is the torque command. Note that the same cylinder numbers in Figure 1 indicate the same or equivalent parts.
Claims (1)
レベータの実速度を検出する実速度検出手段、及びこれ
ら両手段の出力であるエレベータの速度指令と実速度と
の偏差によりエレベータ駆動電動機のトルク指令を演算
する速度制御演算手段を備えたものにおいて、上記速度
制御演算手段により演算されるトルク指令が所定値以上
になったことを検出する速度制御演算出力判定手段、こ
の速度制御演算出力判定手段がトルク指令の上記所定値
以上を検出した時点における上記エレベータの速度指令
または実速度が所定値以下であることを検出するエレベ
ータ速度判定手段、上記速度制御演算出力判定手段のト
ルク指令の所定値以上の検出が所定時間以上継続したこ
とを判定する経過時間判別手段、及び上記エレベータ速
度判定手段がエレベータ速度の所定値以下を検出し、か
つ上記経過時間判定手段が所定値以上のトルク指令の所
定時間以上継続を検出した時エレベータを急停止または
最寄階に停止させる指令を出力する急停止指令出力手段
を設けたことを特徴とするエレベータの安全装置。A speed command generation means for generating an elevator speed command, an actual speed detection means for detecting the actual speed of the elevator, and a torque command for the elevator drive motor based on the deviation between the elevator speed command and the actual speed which are the outputs of both of these means. The speed control calculation output determination means detects that the torque command calculated by the speed control calculation means exceeds a predetermined value, and the speed control calculation output determination means detects the torque. Elevator speed determination means for detecting that the speed command or actual speed of the elevator is less than or equal to a predetermined value at the time when the command is detected to be greater than or equal to the predetermined value, and detection of a torque command of the speed control calculation output determination means to be greater than or equal to the predetermined value. elapsed time determining means for determining that the torque command has continued for a predetermined time or more, and the elevator speed determining means detecting that the elevator speed is below a predetermined value, and the elapsed time determining means determines that the torque command of a predetermined value or more continues for a predetermined time or more. A safety device for an elevator, characterized in that it is provided with a sudden stop command output means for outputting a command to suddenly stop the elevator or stop the elevator at the nearest floor when detecting this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132712A JPS63295385A (en) | 1987-05-28 | 1987-05-28 | Safety device for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132712A JPS63295385A (en) | 1987-05-28 | 1987-05-28 | Safety device for elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63295385A true JPS63295385A (en) | 1988-12-01 |
| JPH0581517B2 JPH0581517B2 (en) | 1993-11-15 |
Family
ID=15087809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62132712A Granted JPS63295385A (en) | 1987-05-28 | 1987-05-28 | Safety device for elevator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63295385A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009215057A (en) * | 2008-03-13 | 2009-09-24 | Toshiba Elevator Co Ltd | Compulsory deceleration control system of elevator |
| EP3808691A1 (en) * | 2019-10-18 | 2021-04-21 | KONE Corporation | A method for monitoring brake dragging of an elevator |
-
1987
- 1987-05-28 JP JP62132712A patent/JPS63295385A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009215057A (en) * | 2008-03-13 | 2009-09-24 | Toshiba Elevator Co Ltd | Compulsory deceleration control system of elevator |
| EP3808691A1 (en) * | 2019-10-18 | 2021-04-21 | KONE Corporation | A method for monitoring brake dragging of an elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0581517B2 (en) | 1993-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |