System and method for reinjection of retard energy in a trolley-based electric mining haul truck
AssigneeSiemens Industry, Inc.
InventorsJoy Mazumdar, Walter Köllner
Life of this patent
Estimating the term…
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.
Claims21
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.
An electrical power system for storing retard energy regenerated from an electrical motor on a vehicle, the electrical power system comprising:
- 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.
Dependencies are inferred from the claim text.