System and method for reinjection of retard energy in a trolley-based electric mining haul truck
First Claim
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1. An electrical power system for reinjecting retard energy regenerated from an electrical motor on a mining haul truck, the electrical power system comprising an inverter that:
- receives at least a portion of the retard energy regenerated during at least one retard interval, wherein the at least one retard interval occurs while the mining truck is travelling downhill; and
transmits via trolley lines at least a portion of the retard energy to a bidirectional substation while the mining truck is travelling downhill.
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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.
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Citations
21 Claims
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1. An electrical power system for reinjecting retard energy regenerated from an electrical motor on a mining haul truck, the electrical power system comprising an inverter that:
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receives at least a portion of the retard energy regenerated during at least one retard interval, wherein the at least one retard interval occurs while the mining truck is travelling downhill; and transmits via trolley lines at least a portion of the retard energy to a bidirectional substation while the mining truck is travelling downhill. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrical power system for storing retard energy regenerated from an electrical motor on a vehicle, the electrical power system comprising:
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an inverter that receives at least a portion of the retard energy an on-board electrical energy storage system operably coupled to the inverter; an auxiliary electrical energy storage system operably coupled to the inverter via trolley lines; and a computational system operably coupled to the inverter that; determines whether the on-board electrical energy storage system is fully charged; upon determining that the on-board electrical energy storage system is not fully charged; directs the inverter to transmit at least a portion of the retard energy to the on-board electrical energy storage system and to charge 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; directs the inverter to transmit via the trolley lines at least a portion of the retard energy to the auxiliary electrical energy storage system and to charge the auxiliary electrical energy storage system with at least a portion of the retard energy. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification