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Method and arrangement for controlling electric current in tether cable of a mining vehicle

A technology of cables and tethers, which is applied in the field of drilling rigs and electric loaders, and can solve problems such as excessive current limitation and thick cables

Active Publication Date: 2021-12-10
SANDVIK MINING & CONSTR OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Attempting to estimate in advance how much current will be encountered during use can result in over-limiting the current, or using cables that are so thick that only a limited length of cable will fit in the space available on the mining vehicle

Method used

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  • Method and arrangement for controlling electric current in tether cable of a mining vehicle
  • Method and arrangement for controlling electric current in tether cable of a mining vehicle
  • Method and arrangement for controlling electric current in tether cable of a mining vehicle

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Embodiment Construction

[0027] image 3 Some components of an electric mining vehicle are schematically illustrated. Tether cables 301 are used to connect the mining vehicle to an external source of electrical power, such as the grid of a mine or other environment in which the mining vehicle will be used, a dedicated power transmission station or a generator car. Various subsystems on the mining vehicle will be powered by electrical energy received via tether cable 301 from an external electrical source. An example of such a subsystem is eg an actuator 302 which means eg a lift mechanism with which the loader moves its bucket. Another example of an on-board motor subsystem is the conveyor system 303, which means the vehicle's traction mechanism and its motor. Also shown is a battery charging subsystem 304 which generally covers all chargeable on-board electrical energy storage devices and means for controlling their state of charge. The power link voltage subsystem 305 includes means for managing ...

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Abstract

Method and arrangement are provided for controlling electric current in a tether cable of an electrically driven mining vehicle. There is determined an indicator of an equivalent cycle current that flows through said tether cable, and obtained one or more descriptors of an actual state of dynamically changing conditions of the tether cable. A current limiting value is determined on the basis of said indicator and said descriptors, and a total amount of current is limited that said mining vehicle draws through said tether cable to a value smaller than or equal to said determined current limiting value.

Description

technical field [0001] The present invention generally relates to electric mining vehicles, such as electric loaders, drill rigs, and the like. In particular, the invention relates to the task of controlling how much current flows through the tether cables of such mining vehicles. Background technique [0002] Electric mining vehicles have several advantages over mining vehicles powered by internal combustion engines, such as having no exhaust and being independent of fuel delivery. It is not feasible to assume that heavy-duty mining vehicles will be able to run for long enough on-board batteries alone if battery technology does not allow for sufficiently high electrical energy storage densities. The traditional solution has been to create an electrical grid in the mine, to which electric mining vehicles are connected using long cables, a sufficient length of which is reeled from a cable drum or reel at the rear of the vehicle. [0003] figure 1 Some components of a conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L9/00B60L50/53B60L53/302
CPCB60L2240/36B60L2250/12B60L2260/50B60L2240/12B60L2260/46B60L9/00B60L50/53B60L53/302Y02T90/12B60L53/18B60L2200/40E02F9/00
Inventor 萨穆利·韦尔霍哈里·瓦塔宁托米·蒂霍宁米科·科沃拉伊莫·云图宁米科·基图拉
Owner SANDVIK MINING & CONSTR OY