JPS60223792A - Electric hoist - Google Patents
Electric hoistInfo
- Publication number
- JPS60223792A JPS60223792A JP5450585A JP5450585A JPS60223792A JP S60223792 A JPS60223792 A JP S60223792A JP 5450585 A JP5450585 A JP 5450585A JP 5450585 A JP5450585 A JP 5450585A JP S60223792 A JPS60223792 A JP S60223792A
- Authority
- JP
- Japan
- Prior art keywords
- electric hoist
- smoothing capacitor
- power
- turned
- capacitor
- 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
- Inverter Devices (AREA)
- Stopping Of Electric Motors (AREA)
- Non-Insulated Conductors (AREA)
- Iron Core Of Rotating Electric Machines (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】
〔発明の利用分野〕
本発明は電気ホイストに係り、特にインバータ装置によ
って巻上速度を可変する可変速形の電気ホイストに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an electric hoist, and particularly to a variable speed electric hoist whose hoisting speed is varied by an inverter device.
従来は第１図に示す如く、平滑コンデンサ３と並列に高
抵抗１１を入れてあり、電源ＯＦＦ時には、該抵抗１１
により該コンデンサ３に貯えられた電荷を放電させてい
る。しかし抵抗１１をあまり小さくすると運転時にこの
抵抗１１での消費電力が大となり、効率が悪くなるため
、かなりの高抵抗にしである。このため、電源ＯＦＦ後
のコンデンサ３の放電時間が長くなり、電源ＯＦＦ後、
すぐにメンテナンス等を行なう場合、きわめて危険であ
る。特にホイストでは、巻下げ時の回生電力が大きく、
平滑コンデンサ３の端子電圧が上昇しており、きわめて
危険である。Conventionally, as shown in Fig. 1, a high resistance 11 is placed in parallel with the smoothing capacitor 3, and when the power is turned off, the resistance 11 is connected to the smoothing capacitor 3.
This causes the charge stored in the capacitor 3 to be discharged. However, if the resistor 11 is too small, the power consumption in the resistor 11 during operation will be large and the efficiency will be poor, so the resistance will be quite high. For this reason, the discharge time of the capacitor 3 after the power is turned off becomes longer, and after the power is turned off,
It is extremely dangerous to perform maintenance immediately. Especially with hoists, the regenerative power when lowering is large.
The terminal voltage of the smoothing capacitor 3 has increased, which is extremely dangerous.
本発明の目的は、運転時の消費電力を増大させることな
く、電源ＯＦＦ時のメンテナンスを安全に行うことので
きる電気ホイストを提供するにある。An object of the present invention is to provide an electric hoist that can safely perform maintenance when the power is turned off without increasing power consumption during operation.
本発明は、平滑コンデンサ及びインバータユニット、イ
ンバータ制御回路よりなるインバータ装置により、巻上
速度を可変できるものであって、巻下げ時の回生電力を
、平滑コンデンサの端子電圧の一定値以上の上昇により
該コンデンサと直列に接続される回生抵抗器により消費
する如くしたものにおいて、運転停止後、自動的又は手
動のスイッチ手段で該コンデンサと該回生抵抗器とを短
絡させる事を特徴とする電気ホイストである。The present invention is capable of varying the hoisting speed using an inverter device consisting of a smoothing capacitor, an inverter unit, and an inverter control circuit. An electric hoist that consumes power through a regenerative resistor connected in series with the capacitor, and the electric hoist is characterized in that the capacitor and the regenerative resistor are short-circuited by automatic or manual switching means after the operation is stopped. be.
以下、本発明の一実施例を第２図に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on FIG. 2.
インバータ装置ｌｌは、コンバータ２、平滑コンデンサ
３、インバータユニット４、インバータ制御回路５より
なっており、電源の電磁接触器１４と巻上モードル６と
を結びつけている。７は回生装置であり、平滑コンデン
サ３のプラス側、マイナス側端子間に接続されている。The inverter device 11 includes a converter 2, a smoothing capacitor 3, an inverter unit 4, and an inverter control circuit 5, and connects an electromagnetic contactor 14 of a power source and a hoisting mode 6. A regeneration device 7 is connected between the positive and negative terminals of the smoothing capacitor 3.
又電磁接触器１４の出力側には、通電により開放となる
ブレーキソレノイド１５が接続されている。Further, a brake solenoid 15 is connected to the output side of the electromagnetic contactor 14, and is opened when energized.
回生装Ｍ７には、放電用スイッチングトランジスタ８と
、平滑コンデンサ３の両端電圧が一定値以上（例えば３
５０Ｖ）になると該トランジスタ８をＯＮさせるベース
駆動回路９．及び該トランジスタ８の出力側には、回生
抵抗１０が接続されている。In the regeneration device M7, the voltage across the discharge switching transistor 8 and the smoothing capacitor 3 is equal to or higher than a certain value (for example, 3
50V), the base drive circuit 9 turns on the transistor 8. A regenerative resistor 10 is connected to the output side of the transistor 8.
又、スイッチングトランジスタ８と並列に電磁接触器１
４のＢ接点１６とスナップスイッチ１７の直列回路が接
続されている。Further, an electromagnetic contactor 1 is connected in parallel with the switching transistor 8.
A series circuit of the B contact 16 of No. 4 and the snap switch 17 is connected.
本回路のＯＮ、ＯＦＦは電源スィッチ１８により行なわ
れる。電源スィッチ１８を入れると電磁接触器１４がＯ
ＮＬ、、ブレーキは開放されインバータ装ｗ１は、巻上
、下げ入力及び速度指令入力により設定速度にて巻上モ
ードル６を回転させる。This circuit is turned on and off by a power switch 18. When the power switch 18 is turned on, the electromagnetic contactor 14 is turned on.
NL, the brake is released and the inverter unit w1 rotates the hoisting mode 6 at a set speed by the hoisting, lowering input and speed command input.
この時、電磁接触器１４のＢ接点１６は開いており、ス
ナップスイッチ１７をＯＮ、０ＦＦＬでも無関係となっ
ている。巻下げ運転時には、回生電力がインバータユニ
ット４を逆流し、平滑コンデンサ３の端子電圧を上昇さ
せ、該電圧が３５０Ｖを越えるとスイッチングトランジ
スタ８がＯＮし。At this time, the B contact 16 of the electromagnetic contactor 14 is open, and it is irrelevant whether the snap switch 17 is ON or OFF. During the lowering operation, the regenerated power flows backward through the inverter unit 4, increasing the terminal voltage of the smoothing capacitor 3, and when the voltage exceeds 350V, the switching transistor 8 is turned on.
該回生電力を回生抵抗１０で消費させる。The regenerative power is consumed by the regenerative resistor 10.
電源スィッチ１８をＯＦＦすると、電磁接触器１４は開
路となり、ブレーキソレノイド１５が働き巻上げモード
ル６は停止するが平滑コンデンサ３には直流高電圧が残
留している。この時、スナップスイッチ１７をＯＮすれ
ば、電磁接触器１４のＢ接点１６は閉じているため回生
抵抗１０（例えば４０Ω）により該コンデンサ３を短絡
したことになり、きわめて急速に電荷は放電される。本
発明の一実施例によれば、スナップスイッチ１７による
放電回路に電源ＯＮ、ＯＦＦＮ型ＯＦＦ器１４のＢ接点
１６が直列に入っているため、ホイスト運転中誤って該
スイッチ１７を投入されても閉路しないため回生抵抗１
０を焼損する恐れもない。When the power switch 18 is turned off, the electromagnetic contactor 14 is opened, the brake solenoid 15 is activated, and the hoisting mode 6 is stopped, but a high DC voltage remains in the smoothing capacitor 3. At this time, if the snap switch 17 is turned on, the B contact 16 of the electromagnetic contactor 14 is closed, which means that the capacitor 3 is short-circuited by the regenerative resistor 10 (for example, 40Ω), and the charge is discharged extremely rapidly. . According to one embodiment of the present invention, since the B contact 16 of the power ON/OFFN type OFF device 14 is connected in series with the discharge circuit formed by the snap switch 17, even if the switch 17 is accidentally turned on during hoist operation, Regenerative resistance 1 because the circuit is not closed
There is no risk of burning out the 0.
他の実施例として、電磁接触器１４のＢ接点１６の開閉
容量が十分とれる場合には、スナップスイッチ１７はな
くても良い。この場合は、電源ＯＦＦするたびに自動的
に回生抵抗１０を使って急速放電が行なわれる。As another example, if the B contact 16 of the electromagnetic contactor 14 has sufficient switching capacity, the snap switch 17 may be omitted. In this case, rapid discharge is automatically performed using the regenerative resistor 10 every time the power is turned off.
又他の実施例として、電磁接触器１４のＢ接点１６がな
くても良いことはもちろんである。In other embodiments, the B contact 16 of the electromagnetic contactor 14 may of course not be provided.
更に他の実施例として、該急速放電回路を該電磁接触器
１４のＢ接点１６を介した他の電磁リレー等で形成して
も良い。Furthermore, as another embodiment, the rapid discharge circuit may be formed by another electromagnetic relay or the like via the B contact 16 of the electromagnetic contactor 14.
本発明に良れば、巻下げ時の回生電力吸収用に使う低抵
抗を利用して短時間に平滑コンデンサの電荷を放電でき
るので、運転時の消費電力を増大することなく、電源Ｏ
ＦＦ時のメンテナンスをきわめて安全に行なうことがで
きる。According to the present invention, the electric charge of the smoothing capacitor can be discharged in a short time by using the low resistance used for absorbing regenerative power during lowering, so the power supply can be turned off without increasing power consumption during operation.
Maintenance during FF can be performed extremely safely.
第１図は、従来の電気ホイストの回路ブロック図、第２
図は１本発明の電気ホイストの回路ブロック図。
２・・・コンバータ、３・・・平滑コンデンサ、４・・
・インバータユニット、５・・・インバータ制御回路、
１・・・インバータ装置、１０・・・回生抵抗器、１７
・・・スイッチ手段。Figure 1 is a circuit block diagram of a conventional electric hoist, and Figure 2 is a circuit block diagram of a conventional electric hoist.
The figure is a circuit block diagram of an electric hoist according to the present invention. 2...Converter, 3...Smoothing capacitor, 4...
・Inverter unit, 5... Inverter control circuit,
1... Inverter device, 10... Regeneration resistor, 17
...Switch means.
Claims (1)
タ制御回路よりなるインバータ装置により、巻上速度を
可変できるものであって、巻下げ時の回生電力を、平滑
コンデンサの端子電圧の一定値以上の上昇により該コン
デンサと直列に接続される回生抵抗器により消費する如
くしたものにおいて、運転停止後、自動的又は手動のス
イッチ手段で該コンデンサと該回生抵抗器とを短絡させ
る事を特徴とする電気ホイスト。1. The hoisting speed can be varied by an inverter device consisting of a smoothing capacitor, an inverter unit, and an inverter control circuit, and the regenerated power during hoisting is controlled by increasing the terminal voltage of the smoothing capacitor beyond a certain value. 1. An electric hoist, characterized in that the condenser is consumed by a regenerative resistor connected in series with the hoist, and the electric hoist is characterized in that the capacitor and the regenerative resistor are short-circuited by automatic or manual switching means after the operation is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5450585A JPS60223792A (en) | 1985-03-20 | 1985-03-20 | Electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5450585A JPS60223792A (en) | 1985-03-20 | 1985-03-20 | Electric hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60223792A true JPS60223792A (en) | 1985-11-08 |
| JPH034476B2 JPH034476B2 (en) | 1991-01-23 |
Family
ID=12972488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5450585A Granted JPS60223792A (en) | 1985-03-20 | 1985-03-20 | Electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60223792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010202135A (en) * | 2009-03-05 | 2010-09-16 | Sumitomo Heavy Ind Ltd | Working machine |
| US8639404B2 (en) | 2008-11-18 | 2014-01-28 | Sumitom Heavy Industries, Ltd. | Working machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438521A (en) * | 1977-09-02 | 1979-03-23 | Hitachi Ltd | Power source equipment |
| JPS54164846U (en) * | 1978-05-11 | 1979-11-19 |
-
1985
- 1985-03-20 JP JP5450585A patent/JPS60223792A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438521A (en) * | 1977-09-02 | 1979-03-23 | Hitachi Ltd | Power source equipment |
| JPS54164846U (en) * | 1978-05-11 | 1979-11-19 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8639404B2 (en) | 2008-11-18 | 2014-01-28 | Sumitom Heavy Industries, Ltd. | Working machine |
| US9108516B2 (en) | 2008-11-18 | 2015-08-18 | Sumitomo Heavy Industries, Ltd. | Working machine |
| JP2010202135A (en) * | 2009-03-05 | 2010-09-16 | Sumitomo Heavy Ind Ltd | Working machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH034476B2 (en) | 1991-01-23 |
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