JPH05201631A - Controller for hydraulic elevator - Google Patents

Controller for hydraulic elevator

Info

Publication number
JPH05201631A
JPH05201631A JP4011568A JP1156892A JPH05201631A JP H05201631 A JPH05201631 A JP H05201631A JP 4011568 A JP4011568 A JP 4011568A JP 1156892 A JP1156892 A JP 1156892A JP H05201631 A JPH05201631 A JP H05201631A
Authority
JP
Japan
Prior art keywords
hydraulic
hydraulic pump
frequency
control valve
elevator
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
Application number
JP4011568A
Other languages
Japanese (ja)
Inventor
Kazuhiro Hatano
一尋 幡野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP4011568A priority Critical patent/JPH05201631A/en
Publication of JPH05201631A publication Critical patent/JPH05201631A/en
Pending legal-status Critical Current

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  • Types And Forms Of Lifts (AREA)
  • Elevator Control (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To provide a controller for a hydraulic elevator which corrects the starting characteristic in the lowering of the hydraulic elevator by a control circuit having the simple constitution and always gives the constant starting characteristic. CONSTITUTION:A controller for a hydraulic elevator is equipped with a hydraulic pump 8 for the flow of the pressurized oil which is connected with a hydraulic jack 2, electromagnetic proportional control valve 9 connected between the hydraulic jack and a hydraulic pump, AC motor 7 which is revolution- connected with the hydraulic pump, frequency controller 12 for controlling the power source frequency for the ac motor 7, and a speed controller 13 for giving the frequency instruction based on a prescribed speed pattern to the frequency controller.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、油圧エレベータの制御
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a hydraulic elevator.

【0002】[0002]

【従来の技術】一般に油圧エレベータは、流量制御弁を
用いた流量制御方式を採用している。この制御方式で
は、エレベータの上昇時は電動機を一定速度で回転さ
せ、油圧ポンプからの定吐出量の油をタンクへ戻してお
き、起動指令が出るとタンクへ戻す量を流量制御弁で調
整することによりかごの速度を制御する。そして、エレ
ベータの下降時は、かごの自重により油圧シリンダ内の
油がタンクへ還流する油量を流量制御弁で制御すること
によりかごの速度を制御する。
2. Description of the Related Art Generally, a hydraulic elevator adopts a flow rate control system using a flow rate control valve. In this control method, when the elevator is raised, the electric motor is rotated at a constant speed, a fixed amount of oil from the hydraulic pump is returned to the tank, and when the start command is issued, the amount returned to the tank is adjusted by the flow control valve. By controlling the speed of the car. Then, when the elevator is descending, the speed of the car is controlled by controlling the amount of oil that the oil in the hydraulic cylinder recirculates to the tank by the weight of the car by the flow control valve.

【0003】一方、油圧エレベータをさらに効率よく制
御するために、近年、インバータ制御を用い、交流電動
機を可変速運転させ、かごの速度を制御する新しい方式
の油圧エレベータの開発が進められている。この方式で
は、上昇時に常にモータを一定速度で回転させる必要が
ないため、無駄なエネルギーを浪費する必要がない等の
様々な利点がある。
On the other hand, in order to control the hydraulic elevator more efficiently, in recent years, a new type of hydraulic elevator has been developed which uses inverter control to operate the AC electric motor at a variable speed to control the speed of the car. In this method, it is not necessary to rotate the motor at a constant speed at the time of ascending, and therefore, there are various advantages such as unnecessary energy consumption.

【0004】[0004]

【発明が解決しようとする課題】このような従来のイン
バータ制御では、ポンプ側の圧力とシリンダ側の圧力が
等しくなるように制御した後に、かごを始動させるよう
にしている。このため、ポンプの回転数を制御すること
により、ポンプ側の圧力をシリンダ側の圧力まで昇圧さ
せている。すなわち、エレベータ始動前に昇圧する必要
があるために、ポンプの回転数を通常より早く回転さ
せ、油圧ジャッキに圧油を流入させている。しかしなが
ら、この昇圧に時間がかかるため、かごが始動するまで
の時間が長くなる傾向がある。特に、下降時はこの傾向
が顕著である。すなわち、下降時にはポンプを一担、逆
回転させ昇圧した後に、ポンプを油圧ジャッキから圧油
を流出する方向に回転させている。従って、実際にかご
が動き始めるまでの時間が長くなり、始動時に発生する
かごの縦振動も大きくなる。
In such a conventional inverter control, the car is started after the pressure on the pump side and the pressure on the cylinder side are controlled to be equal to each other. Therefore, the pressure on the pump side is increased to the pressure on the cylinder side by controlling the rotational speed of the pump. That is, since it is necessary to increase the pressure before the elevator is started, the rotation speed of the pump is rotated faster than usual, and the pressure oil is made to flow into the hydraulic jack. However, since this boosting takes time, the time until the car starts tends to be long. In particular, this tendency is remarkable when descending. That is, at the time of descending, the pump takes a part of a reverse rotation to increase the pressure, and then the pump is rotated in the direction in which pressure oil flows out from the hydraulic jack. Therefore, the time until the car actually starts moving becomes long, and the longitudinal vibration of the car generated at the time of starting also becomes large.

【0005】本発明はこのような従来の問題点を解決す
るためなされたもので、油圧エレベータの下降時の始動
特性を簡単な構成の制御回路により補正し、常に一定の
始動特性を与えることの出来る油圧エレベータの制御装
置を提供することを目的とする。
The present invention has been made in order to solve such a conventional problem, and it is possible to always provide a constant starting characteristic by correcting the starting characteristic when the hydraulic elevator descends by a control circuit having a simple structure. An object of the present invention is to provide a control device for a hydraulic elevator that can be used.

【0006】[0006]

【課題を解決するための手段】本発明の油圧エレベータ
の制御装置は、油圧ジャッキに接続され圧油を流通させ
る油圧ポンプと、油圧ジャッキと油圧ポンプの間に接続
される電磁比例制御弁と、この油圧ポンプに回転連結さ
れた交流電動機と、この交流電動機に対する電源周波数
を制御する周波数制御装置と、この周波数制御装置に対
して所定の速度パターンに基づく周波数指令を与える速
度制御装置とを備えたものである。
SUMMARY OF THE INVENTION A control device for a hydraulic elevator according to the present invention comprises a hydraulic pump connected to a hydraulic jack for circulating pressure oil, and an electromagnetic proportional control valve connected between the hydraulic jack and the hydraulic pump. An AC electric motor rotationally connected to the hydraulic pump, a frequency control device for controlling a power supply frequency for the AC electric motor, and a speed control device for giving a frequency command based on a predetermined speed pattern to the frequency control device are provided. It is a thing.

【0007】[0007]

【作用】本発明の油圧エレベータの制御装置では、エレ
ベータ下降始動時には、電磁比例制御弁で流量を制御
し、それ以外の場合には油圧ポンプで流量を制御するよ
うにした。すなわち、下降始動時には、電磁比例制御弁
を徐々に開くことにより、油圧ジャッキから圧油を流出
させ、その後、油圧ポンプの回転数を制御することによ
り、圧油の流量を制御するようにしている。従って、常
に安定した油圧エレベータの始動特性の実現が可能とな
る。
In the hydraulic elevator control apparatus according to the present invention, the flow rate is controlled by the electromagnetic proportional control valve when the elevator is started to descend, and the flow rate is controlled by the hydraulic pump in other cases. That is, at the time of descending start, the electromagnetic proportional control valve is gradually opened to allow the pressure oil to flow out from the hydraulic jack, and then the rotational speed of the hydraulic pump is controlled to control the flow rate of the pressure oil. . Therefore, it is possible to always realize stable starting characteristics of the hydraulic elevator.

【0008】[0008]

【実施例】以下、本発明の一実施例を図を用いて詳説す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

【0009】図1は本発明の一実施例の制御装置を使用
した油圧エレベータの全体構造を示している。1はかご
であり、油圧ジャッキ2のプランジャ3によって上下さ
れるプーリ4に巻き掛けられたロープ5から吊り下げら
れている。6は油圧配管であり、油圧ポンプ8と油圧ジ
ャッキ2との間に配設されている。これにより、交流電
動機7により回転駆動される油圧ポンプ8からの圧油を
電磁比例制御弁9を介して油圧ジャッキ2へ、また、油
圧ジャッキ2の圧油を電磁比例制御弁9を介して、タン
ク10に還流させている。従来のインバータ制御では、こ
の制御弁に、電磁切替弁を用いていたが、本発明では前
述のように電磁比例制御弁を用いている。11は交流電動
機7の電源である。12は周波数制御装置であり、交流電
動機7に対する電源周周数を制御する。13はかご1の走
行速度を制御する速度制御装置である。
FIG. 1 shows the entire structure of a hydraulic elevator using a control device according to an embodiment of the present invention. Reference numeral 1 denotes a car, which is suspended from a rope 5 wound around a pulley 4 which is moved up and down by a plunger 3 of a hydraulic jack 2. Reference numeral 6 denotes a hydraulic pipe, which is arranged between the hydraulic pump 8 and the hydraulic jack 2. As a result, the pressure oil from the hydraulic pump 8 rotationally driven by the AC electric motor 7 is supplied to the hydraulic jack 2 via the electromagnetic proportional control valve 9, and the pressure oil of the hydraulic jack 2 is supplied via the electromagnetic proportional control valve 9. It is being returned to the tank 10. In the conventional inverter control, an electromagnetic switching valve was used for this control valve, but in the present invention, an electromagnetic proportional control valve is used as described above. Reference numeral 11 is a power source of the AC motor 7. Reference numeral 12 is a frequency control device, which controls the frequency of the power supply to the AC motor 7. Reference numeral 13 is a speed control device for controlling the traveling speed of the car 1.

【0010】次に、油圧エレベータの制御装置の動作に
ついて説明する。本発明で採用する電磁比例制御弁9
は、かご停止時には閉じ、運転指令によってソレノイド
が励磁されることにより開放される。また、この運転指
令によって交流電動機7が回転するが、このときに周波
数制御装置12によって電源11の周波数が制御され、交流
電動機7の回転速度が制御され、この交流電動機7の回
転速度の変化に追従して、油圧ポンプ8の圧油吐出量が
制御され、かご1が所定の速度パターンに従って上昇す
る。
Next, the operation of the control device for the hydraulic elevator will be described. Electromagnetic proportional control valve 9 used in the present invention
Is closed when the car is stopped and is opened when the solenoid is excited by the operation command. Further, the AC motor 7 is rotated by this operation command, and at this time, the frequency of the power source 11 is controlled by the frequency control device 12 and the rotation speed of the AC motor 7 is controlled. Following this, the pressure oil discharge amount of the hydraulic pump 8 is controlled, and the car 1 rises according to a predetermined speed pattern.

【0011】また、下降時には、電磁比例制御弁9を開
放し、かご1の自重により、油圧ジャッキ2からの排出
によって油圧ポンプ8を回転させ、交流電動機7の発電
制動を利用して、かご1の下降速度を制御するとともに
動力を回生する。本発明では、前記電磁比例制御弁9の
開閉の制御方法に特徴がある。以下に、この制御方法に
ついて、図を用いて説明する。
Further, when descending, the electromagnetic proportional control valve 9 is opened, the hydraulic pump 8 is rotated by the discharge from the hydraulic jack 2 by the weight of the car 1, and the dynamic braking of the AC electric motor 7 is used to make the car 1 Controls the descending speed of and regenerates power. The present invention is characterized by the method of controlling the opening / closing of the electromagnetic proportional control valve 9. The control method will be described below with reference to the drawings.

【0012】図2は、本発明における電磁比例制御弁9
の制御電流と、この制御電流により得られる流量の関係
を表している。下降始動時には制御電流を徐々に上げて
いく。これにより、制御電流が図中のIDS地点を通過
後、圧油が油圧ジャッキ2より流れ始める。さらに、流
量QL が得られるIDL地点まで上昇させる。ここで流量
L とは、電磁比例制御弁9による流量制御領域と油圧
ポンプ8による流量制御領域の境界流量である。従っ
て、流量QL までの低流量領域は、電磁比例制御弁で流
量を制御し、この流量を超えた時点から、かご1の自重
により、油圧ジャッキ2からの排出によって油圧ポンプ
8を回転させ、この回転制動によりかごを制御する。
FIG. 2 shows an electromagnetic proportional control valve 9 according to the present invention.
The relationship between the control current and the flow rate obtained by this control current is shown. At the time of descent start, the control current is gradually increased. As a result, pressure oil starts to flow from the hydraulic jack 2 after the control current passes through the I DS point in the figure. Further, the flow rate is increased to the point I DL where the flow Q L is obtained. Here, the flow rate Q L, which is a boundary flow of the flow control region by the flow control region and the hydraulic pump 8 by the electromagnetic proportional control valve 9. Therefore, low flow region to flow Q L controls the flow in the solenoid proportional control valve, from the time that exceeds this rate, by the weight of the car 1, by rotating the hydraulic pump 8 by the discharge from the hydraulic jack 2, The car is controlled by this rotation braking.

【0013】次に、前述の電磁比例制御弁9の制御電流
の出力タイミングをタイムチャートにより説明する。図
3は、下降時の弁の電流時間特性、図4は、上昇時の弁
の電流時間特性をそれぞれ示している。図3に示すよう
に、始動制御電流IDSから流量QL を得るための制御電
流IDLまでの間は、電磁比例制御弁で流量を制御するた
めに、所定の速度パターンに従うように制御電流を出力
する。出力時間tdlは速度パターンにより決まる。制御
電流IDLを過ぎると、油圧ポンプにより流量制御するた
め、電磁比例制御弁を全開する必要がある。このため、
dlからtd2の間に、制御電流をIDLから全開に必要な
制御電流IDHまで一度に上昇させる。停止時には、制御
弁を全開から全閉にするために、td3からtd4の間に一
度に降下させる。
Next, the output timing of the control current of the electromagnetic proportional control valve 9 will be described with reference to a time chart. FIG. 3 shows the current-time characteristic of the valve when it descends, and FIG. 4 shows the current-time characteristic of the valve when it rises. As shown in FIG. 3, between the start-up control current I DS to the control current I DL for obtaining the flow rate Q L in order to control the flow rate in the solenoid proportional control valve, the control current to follow a predetermined speed pattern Is output. The output time t dl depends on the speed pattern. When the control current I DL is exceeded, the flow rate is controlled by the hydraulic pump, so it is necessary to fully open the electromagnetic proportional control valve. For this reason,
During t dl to t d2 , the control current is increased from I DL to the control current I DH required for full opening at once. At the time of stop, the control valve is lowered at a time between t d3 and t d4 in order to open the control valve from full open.

【0014】上昇時には、図4に示すように、始動時に
は制御弁を全閉から全開にするために、tu1までの間に
全開に必要な制御電流IUHを一度に出力する。また、停
止時には、制御弁を全開から全閉にするために、tu2
らtu3の間に一度に降下させる。
At the time of rising, as shown in FIG. 4, at the time of starting, the control current I UH required for full opening is output at one time until the time t u1 so as to open the control valve from full close to full open. Further, at the time of stop, the control valve is lowered at a time from t u2 to t u3 in order to change the control valve from the fully open state to the fully closed state.

【0015】[0015]

【発明の効果】以上述べたように本発明によれば、本発
明の油圧エレベータの制御装置では、油圧ジャッキに接
続され圧油を流通させる油圧ポンプと、油圧ジャッキと
油圧ポンプの間に接続される電磁比例制御弁と、この油
圧ポンプに回転連結された交流電動機と、この交流電動
機に対する電源周波数を制御する周波数制御装置と、こ
の周波数制御装置に対して所定の速度パターンに基づく
周波数指令を与える速度制御装置を備え、エレベータ下
降始動時には、電磁比例制御弁で流量を制御し、それ以
外の場合には油圧ポンプで流量を制御するようにした。
すなわち、下降始動時には、電磁比例制御弁を徐々に開
くことにより、油圧ジャッキから圧油を流出させ、その
後、油圧ポンプの回転数を制御することにより、圧油の
流量を制御するようにしている。従って、常に安定した
油圧エレベータの始動特性の実現が可能となる。
As described above, according to the present invention, in the control device for a hydraulic elevator according to the present invention, the hydraulic pump connected to the hydraulic jack for circulating the pressure oil is connected between the hydraulic jack and the hydraulic pump. An electromagnetic proportional control valve, an AC motor rotatably connected to the hydraulic pump, a frequency control device for controlling the power supply frequency for the AC motor, and a frequency command based on a predetermined speed pattern to the frequency control device. A speed control device was provided, and the flow rate was controlled by the electromagnetic proportional control valve at the time of elevator descent start, and otherwise the flow rate was controlled by the hydraulic pump.
That is, at the time of descending start, the electromagnetic proportional control valve is gradually opened to allow the pressure oil to flow out from the hydraulic jack, and then the rotational speed of the hydraulic pump is controlled to control the flow rate of the pressure oil. . Therefore, it is possible to always realize stable starting characteristics of the hydraulic elevator.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例である油圧エレベータの制御
装置の構成図である。
FIG. 1 is a configuration diagram of a control device for a hydraulic elevator that is an embodiment of the present invention.

【図2】下降時の電磁比例制御弁における制御電流と流
量の関係を示すグラフである。
FIG. 2 is a graph showing a relationship between a control current and a flow rate in the electromagnetic proportional control valve when descending.

【図3】下降時の電磁比例制御弁における制御電流と時
間の関係を示すグラフである。
FIG. 3 is a graph showing the relationship between the control current and time in the electromagnetic proportional control valve when descending.

【図4】上昇時の電磁比例制御弁における制御電流と時
間の関係を示すグラフである。
FIG. 4 is a graph showing a relationship between control current and time in the solenoid proportional control valve when rising.

【符号の説明】[Explanation of symbols]

1…かご 2…油圧ジャッキ 3…プランジャ 4…プーリ 5…ロープ 6…油圧配管 7…交流電動機 8…油圧ポンプ 9…電磁比例制御弁 10…タンク 11…電源 12…周波数制御装置 13…速度制御装置 1 ... Basket 2 ... Hydraulic jack 3 ... Plunger 4 ... Pulley 5 ... Rope 6 ... Hydraulic piping 7 ... AC motor 8 ... Hydraulic pump 9 ... Electromagnetic proportional control valve 10 ... Tank 11 ... Power supply 12 ... Frequency controller 13 ... Speed controller

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 油圧ジャッキに接続され圧油を流通させ
る油圧ポンプと、前記油圧ジャッキと油圧ポンプの間に
接続される電磁比例制御弁と、前記油圧ポンプに回転連
結された交流電動機と、この交流電動機に対する電源周
波数を制御する周波数制御装置と、この周波数制御装置
に対して所定の速度パターンに基づく周波数指令を与え
る速度制御装置とを有し、エレベータ下降始動時には、
前記電磁比例制御弁で流量を制御し、それ以外の場合に
は油圧ポンプで流量を制御し、油圧エレベータの速度制
御を実施するようにしたことを特徴とする油圧エレベー
タの制御装置。
1. A hydraulic pump connected to a hydraulic jack for circulating pressure oil, an electromagnetic proportional control valve connected between the hydraulic jack and the hydraulic pump, and an AC electric motor rotationally connected to the hydraulic pump. A frequency control device for controlling the power supply frequency for the AC electric motor, and a speed control device for giving a frequency command based on a predetermined speed pattern to this frequency control device, and at the time of elevator descent start,
A control device for a hydraulic elevator, characterized in that the electromagnetic proportional control valve controls the flow rate, and in other cases, the hydraulic pump controls the flow rate to control the speed of the hydraulic elevator.
JP4011568A 1992-01-27 1992-01-27 Controller for hydraulic elevator Pending JPH05201631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4011568A JPH05201631A (en) 1992-01-27 1992-01-27 Controller for hydraulic elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4011568A JPH05201631A (en) 1992-01-27 1992-01-27 Controller for hydraulic elevator

Publications (1)

Publication Number Publication Date
JPH05201631A true JPH05201631A (en) 1993-08-10

Family

ID=11781539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4011568A Pending JPH05201631A (en) 1992-01-27 1992-01-27 Controller for hydraulic elevator

Country Status (1)

Country Link
JP (1) JPH05201631A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7485979B1 (en) 2005-11-17 2009-02-03 Staalesen Haakon A Method and system for controlling power generator having hydraulic motor drive
US8288880B2 (en) 2009-04-21 2012-10-16 Gen-Tech Llc Power generator system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7485979B1 (en) 2005-11-17 2009-02-03 Staalesen Haakon A Method and system for controlling power generator having hydraulic motor drive
US8288880B2 (en) 2009-04-21 2012-10-16 Gen-Tech Llc Power generator system

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