System and method for reinjection of retard energy in a trolley-based electric mining haul truck
AssigneeSiemens Industry, Inc.
InventorsJoy Mazumdar, Walter Koellner
Life of this patent
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Abstract
Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.
Claims18
A method for reinjecting retard energy regenerated from an electrical motor on a mining haul truck, the method comprising the steps of:
- operably coupling the mining haul truck to trolley lines before the mining haul truck travels downhill;
- and
- transmitting via the trolley lines at least a portion of the retard energy regenerated during at least one retard interval to a bidirectional electric substation, wherein the at least one retard interval occurs while the mining haul truck is travelling downhill.
A method for storing retard energy regenerated from an electrical motor on a vehicle, the method comprising the steps of:
- determining whether an on-board electrical energy storage system is fully charged;
- upon determining that the on-board electrical energy storage system is not fully charged:
- transmitting at least a portion of the retard energy to the on-board electrical energy storage system;
- and
- charging the on-board electrical energy storage system with at least a portion of the retard energy;
- and
- upon determining that the on-board electrical energy storage system is fully charged:
- transmitting via trolley lines at least a portion of the retard energy to an auxiliary electrical energy storage system;
- and
- charging the auxiliary electrical energy storage system with at least a portion of the retard energy.
Dependencies are inferred from the claim text.