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US 7,479,757 B2Granted
System and method for a cooling system
AssigneeSiemens Energy & Automation, Inc.
InventorRaed H. Ahmad
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
Claims17
A system comprising:
- an auxiliary power system for use in a mining machine comprising:
- an active Insulated Gate Bipolar Transistor device adapted to, when the mining machine is under retard, receive a first AC signal from a traction motor and provide a first DC signal to a DC bus, and thereby function as a rectifier, said active Insulated Gate Bipolar Transistor device adapted to, when the mining machine is not under retard, receive a third DC signal from the DC bus and provide a second AC signal to the traction motor and thereby function as an inverter, transistors of said active Insulated Gate Bipolar Transistor device are switched by an information device;
- a liquid-cooled heat sink adapted to receive a second DC signal from an active Insulated Gate Bipolar Transistor DC chopper, the active Insulated Gate Bipolar Transistor DC chopper adapted to receive the first DC signal and convert the first DC signal to the second DC signal;
- a liquid pump adapted to move a cooling liquid over said heat sink;
- a fan adapted to circulate air to cool the cooling liquid;
- and applying two active vectors for a specific traction of a sampling interval to operate switches of said active Insulated Gate Bipolar Transistor device.
3 more elements
A method comprising a plurality of activities, said activities comprising:
- from an active Insulated Gate Bipolar Transistor device functioning as a rectifier, when an associated machine is under retard, receiving a first DC signal at a DC bus, said active Insulated Gate Bipolar Transistor device adapted to, when the machine is not under retard, receive a third DC signal from the DC bus and provide a second AC signal to a traction motor and thereby function as an inverter, transistors of said active Insulated Gate Bipolar Transistor device are switched by an information device;
- receiving the first DC signal at an active Insulated Gate Bipolar Transistor chopper associated with a mining machine;
- providing a second DC signal from the active Insulated Gate Bipolar Transistor chopper to a liquid-cooled heat sink;
- pumping a cooling liquid adapted to cool the heat sink;
- circulating air to cool the cooling liquid via a fan;
- and
- applying two active vectors for a specific fraction of a sampling interval to operated switches of said active Insulated Gate Bipolar Transistor device.
4 more elements
Dependencies are inferred from the claim text.