MX172841B - Metodo y aparato para detectar sobrecarga mecanica en un torno de izar - Google Patents

Metodo y aparato para detectar sobrecarga mecanica en un torno de izar

Info

Publication number
MX172841B
MX172841B MX019343A MX1934390A MX172841B MX 172841 B MX172841 B MX 172841B MX 019343 A MX019343 A MX 019343A MX 1934390 A MX1934390 A MX 1934390A MX 172841 B MX172841 B MX 172841B
Authority
MX
Mexico
Prior art keywords
motor
current level
signal
mechanical overload
representative
Prior art date
Application number
MX019343A
Other languages
English (en)
Inventor
Richard L Pratt
Original Assignee
Harnischfeger 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 Harnischfeger Corp filed Critical Harnischfeger Corp
Publication of MX172841B publication Critical patent/MX172841B/es

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load

Landscapes

  • Control Of Ac Motors In General (AREA)
  • Control Of Electric Motors In General (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

La presente invención se refiere a un método para controlar un torno de izar, para subir y bajar un objeto, estando cargado el torno de izar por el peso del objeto y su elevación o descenso, incluyendo el torno de izar un motor de corriente alterna y una fuente de alimentación de frecuencia ajustable, conectada al motor; caracterizado porque comprende los pasos de: determinar el valor del nivel de corriente de la potencia suministrada al motor, indicativo de una condición de sobrecarga mecánica predeterminada del torno de izar; proveer una señal de referencia, representativa del nivel de corriente y, de tal manera, representativa de la condición de sobrecarga mecánica; sentir el nivel de corriente de la potencia alimentada al motor y producir una señal de corriente real, representativa del nivel de corriente; y comparar la señal de corriente real con la señal de referencia, y proveer una señal de salida de sobrecarga, si la señal de corriente real es igual a o mayor que la señal de referencia.
MX019343A 1989-01-31 1990-01-31 Metodo y aparato para detectar sobrecarga mecanica en un torno de izar MX172841B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/304,757 US4953053A (en) 1989-01-31 1989-01-31 Method and apparatus for detecting mechanical overload of a hoist

Publications (1)

Publication Number Publication Date
MX172841B true MX172841B (es) 1994-01-17

Family

ID=23177876

Family Applications (1)

Application Number Title Priority Date Filing Date
MX019343A MX172841B (es) 1989-01-31 1990-01-31 Metodo y aparato para detectar sobrecarga mecanica en un torno de izar

Country Status (3)

Country Link
US (1) US4953053A (es)
CA (1) CA2008685C (es)
MX (1) MX172841B (es)

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US8840918B2 (en) 2001-05-01 2014-09-23 A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences Hydrogel compositions for tooth whitening
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US20050113510A1 (en) * 2001-05-01 2005-05-26 Feldstein Mikhail M. Method of preparing polymeric adhesive compositions utilizing the mechanism of interaction between the polymer components
DE60233217D1 (de) * 2001-05-01 2009-09-17 Corium Internat Inc Hydrogel-zusammensetzungen
US8206738B2 (en) 2001-05-01 2012-06-26 Corium International, Inc. Hydrogel compositions with an erodible backing member
US8541021B2 (en) 2001-05-01 2013-09-24 A.V. Topchiev Institute Of Petrochemical Synthesis Hydrogel compositions demonstrating phase separation on contact with aqueous media
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CN102764247B (zh) 2004-01-30 2016-04-20 考里安国际公司 递送活性剂的快速溶解膜
US7354028B1 (en) * 2006-09-25 2008-04-08 Abb Inc. Method for controlling application of brakes in single drum hoist systems
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DE102008024215B4 (de) * 2008-05-19 2015-08-20 Manitowoc Crane Group France Sas Bestimmung und Rekonstruktion von Laständerungen an Hebezeugen
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US8279565B2 (en) * 2009-02-20 2012-10-02 Won-Door Corporation Methods and systems relating to overcurrent circuit protection
CN102957379A (zh) * 2011-08-18 2013-03-06 乔山健康科技股份有限公司 跑步机的马达控制系统及其运作方法
US9385637B2 (en) * 2014-05-21 2016-07-05 Hamilton Sundstrand Corporation Brake controller
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CN109626162B (zh) * 2018-12-21 2021-06-08 深圳技术大学（筹） 电梯蹲底和冲顶故障的监测方法与装置
CN112499416B (zh) * 2019-09-16 2023-03-21 湖南中联重科建筑起重机械有限责任公司 基于信息反馈的升降机控制系统、设备及存储介质

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Also Published As

Publication number Publication date
CA2008685C (en) 1994-12-06
US4953053A (en) 1990-08-28
CA2008685A1 (en) 1990-07-31

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