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Date submitted2023-03-14
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Date accepted2023-06-20
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Date published2023-07-19
The wireless charging system for mining electric locomotives
The electric vehicles development has a high potential for energy saving: an energy-saving traffic control can reduce energy resource consumption, and integration with the power grid provides the ability of daily load pattern adjustment. These features are also relevant for underground mining. The critical element of vehicle-to-grid integration is the charging infrastructure, where wireless charging is promising to develop. The implementation of such systems in underground mining is associated with energy efficiency issues and explosion safety. The article discusses the development and research of a wireless charging system for mining electric locomotive A-5.5-600-U5. The analytic hierarchy process is used for justification of the circuitry and design solution by a comparison of different technical solutions based on energy efficiency and safety criteria. A complex computer model of the wireless charging system has been developed that gives the transients in the electrical circuit of a wireless charging system and the high-frequency field density distribution near the transmitting and receiving coils in a 3D setting. An approach to ignition risk evaluation based on the analysis of high-frequency field density in the charging area between the coils of the wireless charging system is proposed. The approach using a complex computer model is applied to the developed system. The study showed that the wireless charging system for mining electric locomotives operating in the gaseous-and-dusty mine is technically feasible and there are designs in which it is explosion safe.
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Date submitted2020-05-18
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Date accepted2020-06-16
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Date published2021-04-26
Traction asynchronous electric drive of mine electric locomotivesimulation model structure improvement
The article discusses the solution to the problem of underground railway transport slipping in dynamic modes, which occurs when there is a significant difference in the speeds of the driving and driven pairs of wheels. The state of the rail surfaces largely determines the coefficient of adhesion, therefore, using a mathematical model, the condition for the dependence of the magnitude of slipping and tractive effort is selected. For effective acceleration and deceleration of an electric locomotive, it is necessary to control the coefficient of adhesion at a certain level. A simulation model of rolling stock has been created, which for the first time takes into account a mechanical system with distributed parameters. In the structural diagram of the automatic control system of traction electric drives with frequency regulation, such factors as the volume of goods being moved, rolling friction, slope (rise) levels and the state of the rail track are taken into account. The simulation results show the features of the movement and stops of the freight train not only by the diagrams of speed and forces in the modes of acceleration-deceleration and uniform movement, but also the positions of the plungers and tractive forces on the couplings of the electric locomotive and all trolleys involved in the movement of goods. The practical application of the proposed method lies in the possibility of starting a heavily laden train from its place on the ascent section in conditions of insufficient adhesion coefficient with contaminated roads.
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Date submitted1953-07-29
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Date accepted1953-09-01
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Date published1954-12-04
Проблемы автоматизации рудничной электровозной откатки
- Authors:
- Unknown
В настоящее время в условиях угольных шахт основным видом транспорта по главным горизонтальным выработкам является электровозная откатка. На газовых шахтах откатка производится электровозами аккумуляторными, а на шахтах, не опасных по газу и пыли, — контактными. Такой вид транспорта в современных условиях — при комплексной механизации угледобычи — обладает рядом существенных недостатков. Зачастую он является причиной нарушения непрерывности процесса транспортирования полезного ископаемого. Часто имеют место нарушения графиков движения. Для современных крупных шахт — при комплексной механизации угледобычи с полной автоматизацией — наиболее прогрессивным видом транспорта является конвейерный. Он легче поддается автоматизации, позволяет сохранять непрерывность процесса транспортирования полезного ископаемого от забоя до железнодорожных бункеров или обогатительных фабрик и является менее опасным для обслуживающего персонала.
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Date submitted1953-07-10
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Date accepted1953-09-07
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Date published1954-12-04
К вопросу электромагнитного способа улучшения условий сцепления колес электровоза с рельсами
- Authors:
- Unknown
В рудничных условиях профиль пути электровозной откатки, как правило, является весьма сложным. Имеют место значительные изменения уклонов пути, малые радиусы закруглений, резкие переходы с одного радиуса закруглений на другой и др. Это вызывает резкое изменение величины сил сопротивления движению поезда, а следовательно, и силы тяги электровоза. Изменение силы тяги вызывается также частыми пусками электровоза в ход при весьма коротких дистанциях пути. Улучшение условий сцепления может быть достигнуто исправлением откаточных путей, устранением резких переломов в профиле путей и малых радиусов закруглений, применением тяжелого профиля рельсов. В этом свете должна быть рассмотрена и возможность увеличения коэффициента сцепления колес электровоза с рельсами электромагнитным путем. Силы магнитного притяжения, возникающие между звеньями контура магнитных силовых линий, могут создать дополнительное электромагнитное сцепление между колесом и рельсом. С этой целью должно быть создано силовое магнитное поле, замкнутое по точкам соприкосновения электровоза с рельсами
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Date submitted1950-07-04
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Date accepted1950-09-27
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Date published1951-04-30
New method for determining the elements of movement of a mine electric locomotive haulage
- Authors:
- A. V. Rysev
In the existing calculation methods of mine electric locomotive haulage for determining the elements of motion - traction force, speed and time of movement, energy consumption - an average or equivalent slope of the haulage tracks is usually adopted. An equivalent slope is a constant slope that is equivalent to the actual profile in terms of the operation of traction motors. For newly designed coal and ore mines, a slope of equal resistance or close to it is often adopted in calculations of mine electric locomotive traction, ensuring normal drainage of water from the workings. A slope of equal resistance is understood to be a constant slope at which the traction force of the electric locomotive when moving with a load downhill and the traction force when moving with an empty train uphill will be the same. The calculations imply that the operation of electric locomotives at a steady speed of movement occurs without acceleration, with a traction force and, accordingly, with a current value corresponding to the uniform movement of the train on the adopted constant slope.