JPH0334697U - - Google Patents
Info
- Publication number
- JPH0334697U JPH0334697U JP9357289U JP9357289U JPH0334697U JP H0334697 U JPH0334697 U JP H0334697U JP 9357289 U JP9357289 U JP 9357289U JP 9357289 U JP9357289 U JP 9357289U JP H0334697 U JPH0334697 U JP H0334697U
- Authority
- JP
- Japan
- Prior art keywords
- reference value
- drive current
- induction motor
- phase induction
- time
- 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
Links
- 230000006698 induction Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control And Safety Of Cranes (AREA)
- Control Of Ac Motors In General (AREA)
Description
第１図は、この考案の一実施例を示す回路図で
ある。
１０……インバータ、１２……三相誘導電動機
、１４……変換器（駆動電流検出手段）、２０…
…コンパレータ（比較手段）、２４……基準値出
力回路（駆動電流基準値出力手段）、２８……ス
テツピングリレー、２８ａ……リレー接点（基準
値制御手段）、３２……速度指令出力回路（速度
指令手段）、Ｉ……駆動電流。
FIG. 1 is a circuit diagram showing an embodiment of this invention. 10... Inverter, 12... Three-phase induction motor, 14... Converter (drive current detection means), 20...
... Comparator (comparison means), 24 ... Reference value output circuit (driving current reference value output means), 28 ... Stepping relay, 28a ... Relay contact (reference value control means), 32 ... Speed command output circuit ( speed command means), I... drive current.
Claims (1)
の速度制御装置において、 前記三相誘導電動機の駆動電流を検出する駆動
電流検出手段と、 前記駆動電流の基準値を出力する駆動電流基準
値出力手段と、 前記駆動電流の検出値と基準値とを比較する比
較手段と、 前記比較手段が検出値よりも基準値のほうが大
きいと判断するごとに１段ずつステツプアツプす
るステツピングリレーと、 前記ステツピングリレーがステツプアツプする
ごとに前記基準値を低下させる基準値制御手段と
、 前記ステツピングリレーがステツプアツプする
ごとに前記三相誘導電動機に速度上昇指令を出力
する速度指令手段 とを具備してなるクレーン等の荷役機械の速度
制御装置。[Claims for Utility Model Registration] A speed control device for a three-phase induction motor for powering a cargo handling machine such as a crane, comprising a drive current detection means for detecting a drive current of the three-phase induction motor, and a reference value of the drive current. drive current reference value output means; comparison means for comparing the detected drive current value with the reference value; and step-up steps each time the comparison means determines that the reference value is greater than the detected value. a stepping relay; a reference value control means for lowering the reference value each time the stepping relay steps up; and a speed command means for outputting a speed increase command to the three-phase induction motor each time the stepping relay steps up. A speed control device for cargo handling machines such as cranes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9357289U JPH0334697U (en) | 1989-08-09 | 1989-08-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9357289U JPH0334697U (en) | 1989-08-09 | 1989-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0334697U true JPH0334697U (en) | 1991-04-04 |
Family
ID=31642945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9357289U Pending JPH0334697U (en) | 1989-08-09 | 1989-08-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0334697U (en) |
-
1989
- 1989-08-09 JP JP9357289U patent/JPH0334697U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63137597U (en) | ||
| KR850001116A (en) | Elevator control | |
| JPH0334697U (en) | ||
| JPS61162300U (en) | ||
| JPS60185078U (en) | Pump dry running prevention device | |
| JPS5822801U (en) | electric car control device | |
| JPS61207197A (en) | Controller for elevator | |
| JPH0440093U (en) | ||
| JPS5860663U (en) | AC elevator control device | |
| JPS63126393U (en) | ||
| JPS63109596U (en) | ||
| JPS61117597U (en) | ||
| JP2001039673A (en) | Crane control device | |
| JPH0345099U (en) | ||
| JPH02145292U (en) | ||
| JPH0325477U (en) | ||
| JPS61194994U (en) | ||
| JPS598968U (en) | elevator control device | |
| JPH04371470A (en) | Speed control device for elevator | |
| JPH0226395U (en) | ||
| JPS6333400U (en) | ||
| JPH0395388U (en) | ||
| JPS58191167U (en) | Hoisting machine control device | |
| JPS63200591U (en) | ||
| JPS6284396U (en) |