Control strategy for providing regenerative electrical power to trolley line in trolley capable mining truck
First Claim
1. A trolley capable mining truck, comprising:
- a machine frame;
ground engaging propulsion elements coupled with the machine frame;
a pantograph supported on the machine frame and having an engaged configuration in which the pantograph is electrically connected with an overhead trolley line and a stowed configuration in which the pantograph is electrically disconnected from the overhead trolley line; and
a power system including;
an onboard electrical power source providing electrical power to a pair of electric drive propulsion motors along a first electrical path in a first configuration of the power system, wherein the onboard electrical power source includes an internal combustion engine coupled to an electrical power generator, wherein the electric drive propulsion motors power the ground engaging propulsion elements;
the pantograph providing electrical power from the overhead trolley line, through a transient damping reactor supported on the machine frame, and to the pair of electric drive propulsion motors along a second electrical path in a second configuration of the power system; and
a third configuration in which, during a braking mode of the trolley capable mining truck, the electric drive propulsion motors provide regenerative electrical power through a regenerative power converter including the transient damping reactor, through the pantograph, and to the overhead trolley line along a third electrical path.
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Accused Products
Abstract
A trolley capable mining truck includes a pantograph supported on a machine frame for electrically connecting the truck with an overhead trolley line. A power system includes an onboard electrical power source providing electrical power to electric drive propulsion motors along a first electrical path in a first configuration of the power system. The pantograph provides electrical power from the overhead trolley line to the electric drive propulsion motors along a second electrical path, which includes a transient damping reactor, in a second configuration of the power system. The power system also includes a third configuration in which, during a braking mode of the trolley capable mining truck, the electric drive propulsion motors provide regenerative electrical power to the overhead trolley line through the pantograph along a third electrical path including a regenerative power converter, wherein the regenerative power converter includes the transient damping reactor.
48 Citations
14 Claims
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1. A trolley capable mining truck, comprising:
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a machine frame; ground engaging propulsion elements coupled with the machine frame; a pantograph supported on the machine frame and having an engaged configuration in which the pantograph is electrically connected with an overhead trolley line and a stowed configuration in which the pantograph is electrically disconnected from the overhead trolley line; and a power system including; an onboard electrical power source providing electrical power to a pair of electric drive propulsion motors along a first electrical path in a first configuration of the power system, wherein the onboard electrical power source includes an internal combustion engine coupled to an electrical power generator, wherein the electric drive propulsion motors power the ground engaging propulsion elements; the pantograph providing electrical power from the overhead trolley line, through a transient damping reactor supported on the machine frame, and to the pair of electric drive propulsion motors along a second electrical path in a second configuration of the power system; and a third configuration in which, during a braking mode of the trolley capable mining truck, the electric drive propulsion motors provide regenerative electrical power through a regenerative power converter including the transient damping reactor, through the pantograph, and to the overhead trolley line along a third electrical path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a trolley capable mining truck including a power system, the method comprising steps of:
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moving a pantograph into a stowed configuration in which the pantograph is electrically disconnected from an overhead trolley line; propelling the trolley capable mining truck in a first configuration of the power system responsive to the stowed configuration at least in part by providing electrical power from an onboard electrical power source, which includes an internal combustion engine coupled to an electrical power generator, to a pair of electric drive propulsion motors; moving the pantograph into an engaged configuration in which the pantograph is electrically connected to the overhead trolley line; propelling the trolley capable mining truck in a second configuration of the power system responsive to the engaged configuration at least in part by providing electrical power from the overhead trolley line, through the pantograph, through a transient damping reactor, and to the electric drive propulsion motors; and providing regenerative electrical power, in a third configuration of the power system and a braking mode of the trolley capable minding truck, from the electric drive propulsion motors, through a regenerative power converter including the transient damping reactor, through the pantograph, and to the overhead trolley line. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification