JPS61254085A - Controller for ac elevator - Google Patents

Controller for ac elevator

Info

Publication number
JPS61254085A
JPS61254085A JP60092659A JP9265985A JPS61254085A JP S61254085 A JPS61254085 A JP S61254085A JP 60092659 A JP60092659 A JP 60092659A JP 9265985 A JP9265985 A JP 9265985A JP S61254085 A JPS61254085 A JP S61254085A
Authority
JP
Japan
Prior art keywords
rectifier
capacitor
elevator
resistor
power
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
JP60092659A
Other languages
Japanese (ja)
Inventor
Masami Nomura
正実 野村
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60092659A priority Critical patent/JPS61254085A/en
Publication of JPS61254085A publication Critical patent/JPS61254085A/en
Pending legal-status Critical Current

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  • Elevator Control (AREA)
  • Motor And Converter Starters (AREA)
  • Power Conversion In General (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To prevent a capacitor from being quickly charged at starting time by charging in advance the capacitor by the second rectifier at stopping time. CONSTITUTION:A 3-phase AC power source is supplied through the contacts 12a-12c of an operation electromagnetic contactor which is closed at operating time and opened at stopping time, a rectifier 1, a smoothing condenser 2, and an inverter 3 to a 3-phase induction motor 4. The condenser 2 is charged by a rectifier 15 and an impedance 16 even during the stopping of a cage 10. Accordingly, even if the contacts 12a-12c are closed at starting time, the quick charging of the condenser 2 is avoided by a low impedance DC current by the rectifier 1.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は交流電動機により駆動されるエレベータを制
御する交流エレベータの制御装置の改良フ に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improved control device for an AC elevator that controls an elevator driven by an AC motor.

〔従来の技術〕[Conventional technology]

エレベータのかごを駆動する電動機に誘導電動機を用い
、これに可変電圧可変周波数の交流電源を供給して、電
動機の速度制御を行うものがある。
An induction motor is used as the motor for driving an elevator car, and an AC power source of variable voltage and frequency is supplied to the induction motor to control the speed of the motor.

これを第3図に示す。This is shown in FIG.

図中、R,8,Tは三相交流電源、(1)は交流電源R
,8,Tに接続されたダイオード(Ia)〜(R)Kよ
って三相全波整流回路を構成して成る整流器。
In the diagram, R, 8, and T are three-phase AC power supplies, and (1) is AC power supply R.
, 8, and diodes (Ia) to (R)K connected to T constitute a three-phase full-wave rectifier circuit.

(2)は整流器(1)の直流出力を平滑にするコンデン
サ、(8)は整流器(1)の直流側に接続され直流を交
流に変換しかつその電圧及び周波数を可憂にするトラン
ジスタ等で構成されて成る周知のインバータ、(4)は
インバータ(8)により駆動される三相誘導電動機、(
5)は電動機(4)に結合されたブレーキ車、(6)は
ブレ−キ車(6)の外周に対向して設けられプレーΦ車
(6)Kばね(図示しない)の力で制動力を与えるブレ
ーキシュー%(ηは付勢されるとブレーキシュー(6)
を上記ばね力に抗してブレーキ車(6)から引き離すブ
レーキコイル、(8)は電動機(4)により駆動される
巻上機の駆動綱車、(9)は綱車(8)に巻き掛けられ
た主索、(転)は主索(9)に結合されたかご、(6)
は同じくつり合おもシ、(12a) 〜(12c)は電
源R,13,Tと整流器(1)の間に挿入されかご叫が
走行するとき閉成するとともに停止するとき開放する電
磁接触器接点である。
(2) is a capacitor that smoothes the DC output of the rectifier (1), and (8) is a transistor, etc. that is connected to the DC side of the rectifier (1) and converts the DC to AC and makes the voltage and frequency of the voltage and frequency unstable. A well-known inverter (4) is a three-phase induction motor driven by an inverter (8), (
5) is a brake wheel connected to the electric motor (4), and (6) is a play wheel (6) provided opposite to the outer periphery of the brake wheel (6), which generates braking force by the force of a K spring (not shown). Brake shoe% (η is the brake shoe when energized (6)
The brake coil is pulled away from the brake sheave (6) against the spring force, (8) is the drive sheave of the hoist driven by the electric motor (4), and (9) is wound around the sheave (8). The main rope connected (trans) is the cage connected to the main rope (9), (6)
(12a) to (12c) are electromagnetic contactors inserted between the power supplies R, 13, and T and the rectifier (1), which close when the car is running and open when the car stops. It is a point of contact.

係る構成において、かご(7)の停止中は、ブレーキシ
ュー(6)は上記ばねの力でブレーキ車(5)を押圧し
ている。今、かご[相]に起動指令が出されると。
In such a configuration, while the car (7) is stopped, the brake shoe (6) presses the brake wheel (5) with the force of the spring. Now, when a start command is issued to the car [phase].

電磁接触器接点(12a)〜(12c)は閉成し、整流
器(1)は直流出力を発生する。そして、コンデンサ(
2)は充電され、その電圧が所定値に達すると、インバ
ータ(8)の各アームの制御素子(図示しない)は順次
運転方向に従って導通して行き、運転方向に対応する相
順の可変電圧可変周波数の交流出力を発生し、その出力
が電動機(4)に供給される。同時に、ブレーキコイル
(7)は付勢されるので、ブレーキシュー(6)はブレ
ーキ車(6)から離れる0これで。
The electromagnetic contactor contacts (12a) to (12c) are closed, and the rectifier (1) generates a DC output. And the capacitor (
2) is charged, and when the voltage reaches a predetermined value, the control elements (not shown) of each arm of the inverter (8) are sequentially turned on according to the driving direction, and the variable voltage is changed in phase order corresponding to the driving direction. It generates an alternating current output of the frequency, and the output is supplied to the electric motor (4). At the same time, the brake coil (7) is energized so that the brake shoe (6) moves away from the brake wheel (6).

電動機(4)は入力の相順によって定まる方向へ起動し
、かご(7)は走行開始する0そして、インバータ(8
)によって周波数が調整されることにより、電動機(4
)の速度、すなわちかごrsの走行速度が制御される0
そして、かご叫が停止予定階に接近すると減速を開始し
、停止予定階停止後接点(12a)〜(12c)が開放
し、電動機(4)への電源は断たれる0同時に、ブレー
キコイル(7)は消勢され、ブレーキシュー(6)は上
記ばねの力でブレーキ車(6)に押圧され、ブレーキ車
(6)に制動力が作用する。これで、かご(財)は安全
に停止予定階に停止する0〔発明が解決しようとする問
題点〕 しかるに、上記構成においては、起動時、コンデンサ(
2)の電荷が自己放電等で放電していると、接点(12
a)〜(12c)が閉成させることによりコンデンサ(
2)を充電する立上シの早い大きな充電電流が流れるの
で、ダイオード(1a)〜(1f)及び接点(tZa)
〜(12c)を損傷する虞れがある。また、エレベータ
のように起動−停止を頻繁に繰り返えすものにおいては
、コンデンサ(2)の寿命を短くする原因にもなる。こ
れを防ぐため、整流器(1)の直流側にリアクトル等を
挿入し、ダイオード(1a)〜(1f)及びコンデンサ
(2)を保護することもできるがt装置が高価なものと
なる。
The electric motor (4) starts in the direction determined by the input phase sequence, and the car (7) starts running.
), the frequency is adjusted by the electric motor (4
), that is, the running speed of the car rs is controlled.
Then, when the car scream approaches the floor where it is scheduled to stop, it starts decelerating, and after stopping at the floor where it is scheduled to stop, the contacts (12a) to (12c) open, and the power to the electric motor (4) is cut off.At the same time, the brake coil ( 7) is deenergized, the brake shoe (6) is pressed against the brake wheel (6) by the force of the spring, and a braking force acts on the brake wheel (6). With this, the car (goods) safely stops at the floor where it is scheduled to stop.0 [Problem to be solved by the invention] However, in the above configuration, when starting, the capacitor (
If the charge of 2) is discharging due to self-discharge, etc., the contact (12
By closing a) to (12c), the capacitor (
2), a large charging current with a fast start-up flows through the diodes (1a) to (1f) and the contact (tZa).
There is a risk of damaging ~(12c). Furthermore, in an elevator that frequently starts and stops, it may shorten the life of the capacitor (2). To prevent this, it is possible to insert a reactor or the like on the DC side of the rectifier (1) to protect the diodes (1a) to (1f) and the capacitor (2), but the device becomes expensive.

この発明は上記不具合を改良するもので、エレベータの
起動時にコンデンサへの充電電流が流れないようにし九
交流エレベータの制御装置を提供することを目的とする
This invention is intended to improve the above-mentioned problems, and an object of the present invention is to provide a control device for a nine-ac elevator that prevents charging current from flowing into a capacitor when the elevator is started.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る交流エレベータの制御装置は。 A control device for an AC elevator according to the present invention is a control device for an AC elevator.

運転用電磁接触器接点と整流器の接続体に、第2の整流
器と抵抗との直列体を並列接続して成る第2の整流回路
を設けたものである。
A second rectifier circuit formed by connecting a series body of a second rectifier and a resistor in parallel is provided at the connection body between the operating electromagnetic contactor contact and the rectifier.

〔作用〕[Effect]

この発明による交流エレベータの制御装置によれば、起
動待電磁接触器接点が閉成しても、停止時にM2の整流
回路によ′リコンデンサを予め充電するので、起動時の
急速充電が避けられる0〔実施例〕 以下、第1図に基いてこの発明の一実施例を説明する0 図中、(ロ)は電源R,B、Tと整流器(1)の出力側
との間に接続されダイオード(15a)〜(15f)に
よって三相全波整流回路が構成された第2の整流器、α
6)は整流器(至)の出力側に挿入された抵抗からなる
インピーダンスであシ、第2の整流器(至)と抵抗α6
)により第2の整流回路を成す0他は第3図と同様であ
る。
According to the control device for an AC elevator according to the present invention, even if the standby electromagnetic contactor contact closes, the rectifier circuit of M2 pre-charges the rectifier at the time of stoppage, so rapid charging at the time of start-up can be avoided. 0 [Embodiment] An embodiment of the present invention will be described below based on FIG. A second rectifier α in which a three-phase full-wave rectifier circuit is configured by diodes (15a) to (15f)
6) is an impedance consisting of a resistor inserted on the output side of the rectifier (to), and the second rectifier (to) and resistor α6
) to form the second rectifier circuit, and the other parts are the same as in FIG.

図示構成において、コンデンサ(2)は整流器μs)と
インピーダンス(至)により、かご叫の停止中も充電さ
れている。したがって、起動時に接点(12a)〜(1
2c)が閉成しても、整流器(1)による低インピーダ
ンス直流電流によりコンデンサ(2)の急速充電は避け
られる。これにより、起動時のコンデンサ(2)の充電
電流によるダイオード(1a)〜(1f)、接点(12
a)〜(12c)及びコンデンサ(2)に及ぼす悪影響
は防止される。
In the configuration shown, the capacitor (2) is charged by the rectifier (μs) and the impedance (to) even when the car is stopped. Therefore, at startup, contacts (12a) to (1
2c) is closed, the low impedance direct current provided by the rectifier (1) prevents rapid charging of the capacitor (2). As a result, the charging current of the capacitor (2) at startup causes the diodes (1a) to (1f) and the contact (12
Adverse effects on a) to (12c) and capacitor (2) are prevented.

第2図にこの発明の他の実施例を示す。FIG. 2 shows another embodiment of the invention.

図中、αりは切替スイッチ、(ト)は電源をしゃ断する
場合のしゃ断器である。その他は第1図構成と同様であ
る。
In the figure, α is a changeover switch, and (G) is a breaker used to cut off the power. The rest of the configuration is the same as the configuration shown in FIG.

通常切替スイッチ(17)の可動端子(C)はA側に接
続されている。保守点検時等に、しゃ断器(18a)〜
(1SC)をしゃ断して、直ちにインバータ(8)等の
点検をする場合、コンデンサ(2)の電荷が残っている
場合があシ、この場合には感電等の事故の虞れがある。
The movable terminal (C) of the normal changeover switch (17) is connected to the A side. During maintenance and inspection, etc., the circuit breaker (18a) ~
If you immediately inspect the inverter (8) etc. after cutting off the (1SC), there may be some charge left in the capacitor (2), in which case there is a risk of accidents such as electric shock.

しかし、コンデンサ(2)が十分放電するのを待ってい
ると保守点検の能率が悪くなる。
However, waiting for the capacitor (2) to sufficiently discharge will reduce the efficiency of maintenance and inspection.

そのため、コンデンサ(2)に並列に抵抗等を追加接続
しておいて極力早く電荷を放電させることも考えられる
が、その抵抗には常に電流が流れ電力の無駄であるばか
りでなく、その抵抗の発熱、実装上のスペース等を考え
ると不利な点が多い。
Therefore, it is possible to connect an additional resistor etc. in parallel to the capacitor (2) to discharge the charge as quickly as possible, but current always flows through that resistor, which is not only a waste of power, but also because of the resistance of the resistor. There are many disadvantages when considering heat generation, mounting space, etc.

そこで、第2図構成では、保守点検時には、切替スイッ
チC1?)の可動端子(C)を(EJ側に接続すること
で、上述のような追加抵抗の発熱、スペースの心配なし
で、コンデンサ(2)の放電が可能となり、保守点検の
能率も上げかつ安全性も確保することができる。
Therefore, in the configuration shown in FIG. 2, during maintenance and inspection, the selector switch C1? ) by connecting the movable terminal (C) of It is also possible to ensure gender.

尚、この発明は5回生電力を電動機(4)内で消費させ
る方式のものに対してはその効果が一層顕著なものとな
る。なぜなら、回生電力は一般に抵抗等で消費されるの
が通常の方式であるが、その場合は、この回生電力消費
用抵抗を利用して放電させる方法が提案されている(特
開昭58−154380号公報)が、そのような装置を
持たないもの(特開昭59−017879号公報)K示
すような方式を採用したエレベータ装置では、コンデン
サ放電抵抗を特別に持つ必要が生じてくるからである(
例えば、特開昭58−452773号公報)0〔発明の
効果〕 以上のように、この発明によれば、運転用電磁接触器接
点と整流器の接続体に、第2の整流器と抵抗との直列体
を並列接続して成る第2の整流回路を設けたので、コン
デンサはかごの停止中も充電され、したがって、起動時
に電磁接触器接点が閉成しても急速充電は避けられ、起
動時のコンデンサの充電電流によるダイオード、電磁接
触器接点及びコンデンサに及ぼす悪影響は防止されると
いう効果を奏する。
Incidentally, the effect of the present invention is even more remarkable when the fifth regenerated power is consumed within the electric motor (4). This is because regenerative power is generally consumed by a resistor, etc., but in that case, a method has been proposed that uses this regenerative power consumption resistor to discharge the power (Japanese Patent Laid-Open No. 58-154380). This is because an elevator system that adopts the system shown in K (Japanese Patent Laid-Open No. 59-017879) does not have such a device, but it becomes necessary to have a special capacitor discharge resistor. (
For example, Japanese Unexamined Patent Publication No. 58-452773) 0 [Effects of the Invention] As described above, according to the present invention, the second rectifier and the resistor are connected in series to the connection body of the operating electromagnetic contactor contact and the rectifier. Since a second rectifier circuit is provided in which the capacitor is connected in parallel, the capacitor is charged even when the car is stopped, and therefore rapid charging is avoided even if the magnetic contactor contact is closed at startup, and the capacitor is charged even when the car is stopped. This has the effect of preventing adverse effects on the diode, electromagnetic contactor contact, and capacitor due to the charging current of the capacitor.

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

第1図はこの発明の一実施例による交流エレベータの制
御装置を示す構成図、第2図はこの発明の他の実施例を
示す構成図、第3図は従来例を示す構成図である。 図中、(1)は整流器、(2)は平滑コンデンサ、(8
)はインバータ、(4)は交流電動機、叫はかご、(1
2a)〜(12c)は運転用電磁接触器接点、(ロ)は
第2の整流器、(至)は抵抗、(ロ)は切替スイッチな
お、図中、同一符号は同−又は相当部分を示す0
FIG. 1 is a block diagram showing a control device for an AC elevator according to one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional example. In the figure, (1) is a rectifier, (2) is a smoothing capacitor, (8
) is the inverter, (4) is the AC motor, shout is the cage, (1
2a) to (12c) are operating electromagnetic contactor contacts, (b) is a second rectifier, (to) is a resistor, and (b) is a changeover switch. In the figures, the same reference numerals indicate the same or equivalent parts. 0

Claims (2)

【特許請求の範囲】[Claims] (1)運転時閉成し停止時開放する運転用電磁接触器の
接点を介して商用交流電源を整流器によつて整流すると
ともに平滑コンデンサにより平滑し、その直流をインバ
ータで可変周波数の交流電力に変換し、この変換された
交流電力によつて交流電動機を駆動してエレベータのか
ごを制御する交流エレベータの制御装置において、上記
運転用電磁接触器接点と整流器の接続体に、第2の整流
器と抵抗との直列体を並列接続して成る第2の整流回路
を設けたことを特徴とする交流エレベータの制御装置。
(1) Commercial AC power is rectified by a rectifier through the contacts of the electromagnetic contactor for operation, which is closed during operation and opened when stopped, and smoothed by a smoothing capacitor, and the DC power is converted to variable frequency AC power by an inverter. In a control device for an AC elevator that controls an elevator car by driving an AC motor using the converted AC power, a second rectifier and A control device for an AC elevator, characterized in that a second rectifier circuit is provided in which a series body with a resistor is connected in parallel.
(2)上記第2の整流回路は、上記第2の整流器と抵抗
との間に設けた切替スイッチにより上記抵抗を上記平滑
コンデンサに並列接続して該平滑コンデンサの放電用抵
抗に切替可能としたことを特徴とする特許請求の範囲第
1項記載の交流エレベータの制御装置。
(2) The second rectifier circuit connects the resistor in parallel to the smoothing capacitor by using a changeover switch provided between the second rectifier and the resistor so that it can be switched to a discharge resistor for the smoothing capacitor. A control device for an AC elevator according to claim 1, characterized in that:
JP60092659A 1985-04-30 1985-04-30 Controller for ac elevator Pending JPS61254085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60092659A JPS61254085A (en) 1985-04-30 1985-04-30 Controller for ac elevator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60092659A JPS61254085A (en) 1985-04-30 1985-04-30 Controller for ac elevator

Publications (1)

Publication Number Publication Date
JPS61254085A true JPS61254085A (en) 1986-11-11

Family

ID=14060596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60092659A Pending JPS61254085A (en) 1985-04-30 1985-04-30 Controller for ac elevator

Country Status (1)

Country Link
JP (1) JPS61254085A (en)

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