JPS6223709B2 - - Google Patents
Info
- Publication number
- JPS6223709B2 JPS6223709B2 JP57032791A JP3279182A JPS6223709B2 JP S6223709 B2 JPS6223709 B2 JP S6223709B2 JP 57032791 A JP57032791 A JP 57032791A JP 3279182 A JP3279182 A JP 3279182A JP S6223709 B2 JPS6223709 B2 JP S6223709B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- smoothing capacitor
- contact
- rectifier
- inverter
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000009499 grossing Methods 0.000 claims description 13
- 206010014357 Electric shock Diseases 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
- Control Of Ac Motors In General (AREA)
Description
【発明の詳細な説明】
この発明は交流エレベータを駆動する装置の改
良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device for driving an AC elevator.
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、これにインバータにより変換された可
変電圧・可変周波数の交流電力を供給して電動機
を駆動するものがある。これを第１図に示す。 An induction motor is used as an electric motor to drive an elevator car, and the electric motor is driven by supplying variable voltage/variable frequency alternating current power converted by an inverter. This is shown in FIG.
図中、Ｒ，Ｓ，Ｔは三相交流電源、１は交流電
源Ｒ，Ｓ，Ｔを投入又は遮断する電源スイツチ、
２は電源スイツチ１に接続され電源電圧を一定の
直流電圧に整流する整流器、３は整流器２の直流
側に接続された平滑コンデンサ、４は整流器２の
直流側に接続されトランジスタ及びダイオードに
より構成され一定直流電圧を任意の電圧及び任意
の周波数に変換する周知のインバータ、５はイン
バータ４の交流側に接続された巻上用の三相誘導
電動機、６は電動機５により駆動される巻上機用
綱車、７は綱車６に巻き掛けられた主索、８，９
はそれぞれ主索７の両端に結合されたかご及びつ
り合おもりである。 In the figure, R, S, and T are three-phase AC power supplies, and 1 is a power switch that turns on or shuts off the AC power supplies R, S, and T.
2 is a rectifier connected to the power switch 1 and rectifies the power supply voltage to a constant DC voltage; 3 is a smoothing capacitor connected to the DC side of the rectifier 2; and 4 is connected to the DC side of the rectifier 2 and is composed of a transistor and a diode. A well-known inverter that converts a constant DC voltage to any voltage and any frequency; 5 is a three-phase induction motor for hoisting connected to the AC side of inverter 4; 6 is for a hoisting machine driven by motor 5; Sheave, 7 is the main rope wrapped around sheave 6, 8, 9
are a car and a counterweight connected to both ends of the main rope 7, respectively.
すなわち、三相交流電力は整流器２と平滑コン
デンサ３により直流電力に変換され、インバータ
４に与えられる。インバータ４は与えられた直流
電力を可変電圧・可変周波数の交流電力に変換
し、それを電動機５に供給する。これで、電動機
５は駆動され、かご８は昇降する。 That is, the three-phase AC power is converted into DC power by the rectifier 2 and the smoothing capacitor 3, and is provided to the inverter 4. The inverter 4 converts the applied DC power into variable voltage/variable frequency AC power and supplies it to the electric motor 5. The electric motor 5 is now driven and the car 8 is moved up and down.
しかし、平滑コンデンサ３は大容量のものが使
用されるため、印加電圧の自己放電時定数は長
い。そのため、電源スイツチ１を遮断したとき、
平滑コンデンサ３の両端には高電圧が発生してお
り、調整、保守等を行う係員に感電の危険を与え
ることがある。 However, since a large capacity smoothing capacitor 3 is used, the self-discharge time constant of the applied voltage is long. Therefore, when power switch 1 is shut off,
A high voltage is generated at both ends of the smoothing capacitor 3, which may pose a risk of electric shock to personnel performing adjustment, maintenance, etc.
この発明は上記不具合を改良するもので、電源
遮断時に閉成する接点で平滑コンデンサを短絡す
ることにより、平滑コンデンサを放電させて調
整、保守等を行う係員の安全を確保するようにし
た交流エレベータの駆動装置を提供することを目
的とする。 This invention aims to improve the above-mentioned problems, and is an AC elevator in which the smoothing capacitor is short-circuited with a contact that closes when the power is cut off, thereby discharging the smoothing capacitor and ensuring the safety of staff performing adjustment, maintenance, etc. The purpose of the present invention is to provide a drive device for the following.
以下、第２図によりこの発明の一実施例を説明
する。 An embodiment of the present invention will be described below with reference to FIG.
図中、１０は平滑用コンデンサ３の一端に接続
され電源スイツチ１が投入されているときは開放
しており遮断すると閉成する短絡用接触器接点、
１１は接点１０と直列に接続されて平滑コンデン
サ３の他端に接続された抵抗である。他は第１図
と同様である。 In the figure, 10 is a short-circuit contactor contact that is connected to one end of the smoothing capacitor 3 and is open when the power switch 1 is turned on and closed when the power switch 1 is turned on;
A resistor 11 is connected in series with the contact 10 and connected to the other end of the smoothing capacitor 3. The rest is the same as in FIG.
電源スイツチ１が投入されている間は、短絡用
接触器接点１０は開放しているので、第１図の場
合と全く同様である。 While the power switch 1 is turned on, the short-circuit contactor contact 10 is open, so the situation is exactly the same as that shown in FIG.
電源スイツチ１が遮断されると、接点１０は閉
成するので、平滑コンデンサ３の電荷は、抵抗１
１を介して速やかに放電する。したがつて、人が
触れても感電の危険はなくなる。 When the power switch 1 is cut off, the contact 10 is closed, so the charge on the smoothing capacitor 3 is transferred to the resistor 1.
1 to quickly discharge the battery. Therefore, there is no danger of electric shock even if a person touches it.
接点１０としては、エレベータの電気回路中、
電源スイツチ１の投入されている間付勢されてい
るリレー、例えば安全回路リレー等の接点を用い
ればよく、安価に構成される。 As the contact 10, in the electric circuit of the elevator,
It is sufficient to use contacts such as a relay that is energized while the power switch 1 is turned on, such as a safety circuit relay, and the structure is inexpensive.
以上説明したとおりこの発明では、商用交流電
源を整流する整流器に接続された平滑コンデンサ
を、上記電源の遮断時に閉成する接点で短絡する
ようにしたので、調整、保守等を行う係員が触れ
ても感電しないようにすることができる。 As explained above, in this invention, the smoothing capacitor connected to the rectifier that rectifies the commercial AC power supply is short-circuited by the contact that closes when the power supply is cut off, so that personnel performing adjustment, maintenance, etc. cannot touch it. You can also prevent electric shock.
第１図は従来の交流エレベータの駆動装置を示
す構成図、第２図はこの発明による交流エレベー
タの駆動装置の一実施例を示す構成図である。
１…電源スイツチ、２…整流器、３…平滑用コ
ンデンサ、４…インバータ、５…三相誘導電動
機、８…エレベータのかご、１０…短絡用接触器
接点なお、図中同一部分は同一符号により示す。
FIG. 1 is a block diagram showing a conventional AC elevator drive device, and FIG. 2 is a block diagram showing an embodiment of the AC elevator drive device according to the present invention. 1... Power switch, 2... Rectifier, 3... Smoothing capacitor, 4... Inverter, 5... Three-phase induction motor, 8... Elevator car, 10... Short-circuit contactor contact. In addition, the same parts in the drawings are indicated by the same symbols. .
Claims (1)
つて直流に整流し、こ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かごを運転す
るようにしたものにおいて、上記商用交流電源が
投入されている間は開放しており遮断されると閉
成して上記平滑コンデンサを短絡する接点を備え
たことを特徴とする交流エレベータの駆動装置。1. Commercial AC power is rectified into DC using a rectifier and smoothing capacitor, this DC is converted to variable frequency AC power using an inverter, and this converted AC power is used to drive an AC motor to operate the car. An AC elevator driving device characterized in that the contact is open while the commercial AC power is turned on and closes when the commercial AC power is turned off to short-circuit the smoothing capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57032791A JPS58152773A (en) | 1982-03-02 | 1982-03-02 | Driving device for alternating current elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57032791A JPS58152773A (en) | 1982-03-02 | 1982-03-02 | Driving device for alternating current elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58152773A JPS58152773A (en) | 1983-09-10 |
| JPS6223709B2 true JPS6223709B2 (en) | 1987-05-25 |
Family
ID=12368669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57032791A Granted JPS58152773A (en) | 1982-03-02 | 1982-03-02 | Driving device for alternating current elevator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58152773A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58154380A (en) * | 1982-03-09 | 1983-09-13 | Mitsubishi Electric Corp | Controller for ac elevator |
-
1982
- 1982-03-02 JP JP57032791A patent/JPS58152773A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58152773A (en) | 1983-09-10 |
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