Study of drive currents for lifting bridge cranes of metallurgical enterprises for early diagnosis of load excess weight
Open Access
- 16 March 2021
- journal article
- research article
- Published by Saint-Petersburg Mining University in Journal of Mining Institute
- Vol. 247, 1-10
- https://doi.org/10.31897/pmi.2021.1.13
Abstract
The article discusses an approach based on the analysis of the drive motor currents to create an additional means of protection against emergency situations during the operation of bridge cranes associated with lifting a load with a mass exceeding the permissible one. A mathematical model of an overhead crane drive is described, as well as the results of computer simulation. It is shown that in the process of lifting up, before the stage of lifting the load, the stator current of the drive electric motor does not depend of the load mass, but when the load is detached, already for several periods of the mains voltage after the rope is pulled, when the mass of the load is exceeded, a measurable excess of the amplitude value of the current is recorded. This pattern has been confirmed for a number of cranes of various lifting capacities used at metallurgical enterprises. The possibility of diagnosing excess weight of the lifted load with a higher speed than existing mechanical methods of overload control is demonstrated, at the same time it is not required to make changes to the structural elements of overhead cranes. В статье рассматривается основанный на анализе токов приводного электродвигателя подход к созданию дополнительного средства защиты от аварийных ситуаций при эксплуатации мостовых кранов, связанных с подъемом груза массой, превышающей допустимую. Описана математическая модель привода мостового крана, а также результаты компьютерного моделирования. Показано, что в процессе подъема до начала этапа отрыва груза ток статора приводного электродвигателя от массы груза не зависит, но при отрыве груза уже за единицы периодов сетевого напряжения после натяжения каната при превышении массы груза фиксируется поддающееся измерению превышение амплитудного значения тока. Данная закономерность подтверждена для ряда кранов различной грузоподъемности, применяемых на металлургических предприятиях. Продемонстрирована возможность диагностирования превышения массы поднимаемого груза с более высоким быстродействием, чем у существующих механических способов контроля перегрузки, при этом не требуется вносить изменения в конструктивные элементы мостовых кранов.Keywords
This publication has 13 references indexed in Scilit:
- Ensuring the Safety of Construction Works During the Erection of Buildings and StructuresJournal of Mining Institute, 2019
- Lumped Mass Models of Mobile CranesPublished by Springer Science and Business Media LLC ,2019
- CALCULATIONS OF DYNAMIC OPERATING MODES OF ELECTRIC DRIVES OF SELF-PROPELLED MINING MACHINESJournal of Mining Institute, 2018
- A framework for real-time pro-active safety assistance for mobile crane lifting operationsAutomation in Construction, 2016
- Industrial fan installations diagnostics based on spectral analysis of stator currentsEnergy-Safety and Energy-Economy, 2016
- THE ASSESSMENT OF POWER CHANGES IN MOTOR PARAMETERS IN CASE OF EMERGENCIES IN THE MECHANICAL PART OF BELT CONVEYORIzvestiya. Ferrous Metallurgy, 2016
- Adaptive Control of a Flexible Crane System With the Boundary Output ConstraintIEEE Transactions on Industrial Electronics, 2013
- Research on intelligent monitoring and protection system of distributive multi-tower cranesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010
- Offshore crane control based on adaptive external modelsAutomatica, 2009
- Dynamics and Control of Cranes: A ReviewJournal of Vibration and Control, 2003