System for supplying propulsion energy from an auxiliary drive and method of making same
First Claim
1. A propulsion system comprising:
- an energy system for supplying power to an electric drive, the energy system comprising;
a bi-directional boost converter coupled to a direct current (DC) link, the bi-directional boost converter comprising a plurality of input channels; and
a first energy storage device coupled to a first input channel of the bi-directional boost converter via a DC bus;
an auxiliary system coupled to the energy system, the auxiliary system comprising;
an auxiliary energy source;
an auxiliary load; and
an auxiliary load controller coupled to the auxiliary energy source and to the auxiliary load; and
a system controller configured to;
determine an amount of propulsion power desired to be supplied to the electric drive;
receive feedback information of the DC link from one of a current sensor and a voltage sensor;
determine, based on the feedback information, a capability of the first energy storage device to supply the amount of propulsion power to the DC link;
determine a power difference between the amount of propulsion power desired to be supplied to the electric drive and an amount of power capable of being supplied by the first energy storage device;
cause the auxiliary load controller to reduce a power draw of the auxiliary load from the auxiliary energy source by at least an amount equal to the power difference; and
cause the bi-directional boost converter to boost a voltage supplied by the auxiliary energy source based on the reduction in power draw and to supply the boosted voltage to the DC link.
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Accused Products
Abstract
A propulsion system is provided that includes an energy system, an auxiliary system, and a system controller. The energy system includes a bi-directional boost converter coupled to a direct current (DC) link and comprising a plurality of input channels. The energy system also includes a first energy storage device coupled to a first input channel of the bi-directional boost converter via a DC bus. The auxiliary system is coupled to the energy system and includes an auxiliary energy source, an auxiliary load, and an auxiliary load controller coupled to the auxiliary energy source and to the auxiliary load. The system controller is configured to cause the auxiliary load controller to reduce a power draw of the auxiliary load from the auxiliary energy source and to cause the bi-directional boost converter to boost a voltage supplied by the auxiliary energy source and to supply the boosted voltage to the DC link.
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Citations
21 Claims
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1. A propulsion system comprising:
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an energy system for supplying power to an electric drive, the energy system comprising; a bi-directional boost converter coupled to a direct current (DC) link, the bi-directional boost converter comprising a plurality of input channels; and a first energy storage device coupled to a first input channel of the bi-directional boost converter via a DC bus; an auxiliary system coupled to the energy system, the auxiliary system comprising; an auxiliary energy source; an auxiliary load; and an auxiliary load controller coupled to the auxiliary energy source and to the auxiliary load; and a system controller configured to; determine an amount of propulsion power desired to be supplied to the electric drive; receive feedback information of the DC link from one of a current sensor and a voltage sensor; determine, based on the feedback information, a capability of the first energy storage device to supply the amount of propulsion power to the DC link; determine a power difference between the amount of propulsion power desired to be supplied to the electric drive and an amount of power capable of being supplied by the first energy storage device; cause the auxiliary load controller to reduce a power draw of the auxiliary load from the auxiliary energy source by at least an amount equal to the power difference; and cause the bi-directional boost converter to boost a voltage supplied by the auxiliary energy source based on the reduction in power draw and to supply the boosted voltage to the DC link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of assembling a propulsion energy system, the method comprising:
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coupling an energy system to a direct current (DC) link, the energy system comprising; a multi-channel bi-directional boost converter coupled to the DC link; and an energy storage device coupled to a first input channel of the bi-directional boost converter via a DC link; coupling an auxiliary system to the energy system, the auxiliary system comprising; an energy source; a load controller coupled to the energy source; and a load coupled to the load controller; coupling a motor to the DC link; coupling a controller to the energy system and to the auxiliary system; and configuring the controller to; determine an amount of additional power needed by the energy system, beyond that available by the energy system, to supply a desired power to the motor; cause a reduction in power draw of the load of the auxiliary system from the energy source of the auxiliary system based on the amount of additional power needed by the energy system; and cause the DC link to receive a boosted voltage from the multi-channel bi-directional boost converter based on the reduction in power draw. - View Dependent Claims (14, 15)
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16. A vehicle system comprising:
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a direct current (DC) energy storage device coupled to a first channel of a bi-directional DC-DC boost converter; an auxiliary energy source coupled to a first load controller and to a second channel of the bi-directional DC-DC boost converter; a first auxiliary load coupled to the first load controller, the first auxiliary load comprising a non-rechargeable device; and a vehicle system controller programmed to; reduce a load energy supplied by the auxiliary energy source to the first auxiliary load from a first energy value to a second energy value; and boost at least a portion of the reduced energy via the bi-directional DC-DC boost converter for supply thereof to a DC link. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification