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Simplified topology for trolley assist-capable electric drive truck

An auxiliary function and wiring technology, applied in the DC link field with three contactors, can solve the problems of irrelevant cost, increased operating cost, and huge fuel cost for mining trucks

Active Publication Date: 2015-02-11
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As with many other heavy equipment systems, fuel costs for mining trucks can be significant
Additionally, many mines are located in remote locations and the costs associated with transporting fuel to the mine site can add significantly to operating costs
Even getting an adequate supply of fuel can be challenging at times, regardless of cost

Method used

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  • Simplified topology for trolley assist-capable electric drive truck
  • Simplified topology for trolley assist-capable electric drive truck
  • Simplified topology for trolley assist-capable electric drive truck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] first reference figure 1 and figure 2 , the mine 10 may include a downhill section 12 and an uphill section 14 . In a typical situation, a plurality of electric trucks 20 with trolley assist function travel unloaded on the downhill section 12 . In low mine locations, trucks can be filled with ore or overburden. After loading the material in the dump table 27, the truck 20 travels from the uphill section 14 to the processing site where the truck is unloaded, and the cycle repeats. In the mine 10 shown, the downhill section 12 and the uphill section 14 each include a respective overhead line 11 and 13 connected to a local grid (not shown) and / or a public grid line. During the uphill segment 14 , each truck 20 may utilize a pantograph 35 to electrically connect the trucks 20 to draw power from the overhead line 13 . Thus, during the uphill segment, power drawn from the trolley 13 is utilized by each individual truck 20 to propel the uphill truck towards the dump or pr...

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PUM

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Abstract

A trolley assist-capable electric drive truck includes a DC link with first, second and third contactors that may be opened and closed in different configurations to operate the truck in different modes. In a normal propel mode, the three contactors are open and electrical power is routed from an onboard electrical power source to electric propulsion motors. During normal retard mode, the three contactors are closed to route electrical energy generated by the electric propulsion motors through a grid resistor of the DC link. In a trolley mode, the first and second contactors are closed, but the third contactor is open, and electrical power is routed from the trolley lines to the motors for propulsion, or in a reverse direction for retarding the truck.

Description

technical field [0001] The present disclosure relates generally to DC links for electric trucks with trolley assist, and more particularly to DC links with three contactors that utilize onboard or trolley power to propel the truck or Different configurations to slow down the truck. Background technique [0002] Large-scale material mining often requires a lot of energy. In many surface mines, fleets of large mining trucks operate almost continuously to transport ore and / or overburden from extraction areas to dumping or processing sites. Many of these mining trucks operate with diesel powered engines using direct drive strategies or diesel-electric drive systems. As with many other heavy equipment systems, fuel costs for mining trucks can be significant. Additionally, many mines are located in remote locations, and the costs associated with transporting fuel to the mine site can add significantly to operating costs. Even getting an adequate supply of fuel can be challengi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L9/04B60L9/18B60L50/13
CPCY02T10/6217B60Y2200/92B60L11/08Y02T10/7241B60L2210/40B60K6/46Y02T10/70B60L7/06Y02T10/648Y02T10/7077B60L2210/30B60L2200/36B60Y2400/212B60L2220/46B60L50/13Y02T10/62Y02T10/7072Y02T10/72Y02T10/64
Inventor 钱乐伟
Owner CATERPILLAR INC