Bi-directional DC-DC power converter for a vehicle system
First Claim
1. A vehicle system comprising:
- a direct current (DC) link;
an energy storage device; and
a bi-directional DC-DC converter assembly coupled to each of between the energy storage device and the DC link, the bi-directional DC-DC converter assembly comprising;
a first converter section coupled to the energy storage device; and
a second converter section coupled to the DC link and the energy storage device;
wherein the bi-directional DC-DC converter assembly is configured to;
process a first portion of power received from the energy storage device, the processed first portion of power determined by a voltage differential between the energy storage device and the DC link; and
provide the processed first portion of power and an unprocessed second portion of power to the second converter section, the unprocessed second portion of power also determined by the voltage differential.
1 Assignment
0 Petitions
Accused Products
Abstract
A bi-directional DC-DC converter assembly that processes and transfers differential power in a variable manner is disclosed. The converter assembly is coupled to an energy storage device and DC link, with the converter assembly including a first converter section coupled to the energy storage device and a second converter section coupled to the DC link and to the energy storage device. The converter assembly processes a first portion of the DC power output of the energy storage device and provides an unprocessed second portion of the DC power output of the energy storage device to the second converter section when providing power to the load, and processes a first portion of a regenerative power from the load and provides an unprocessed second portion of the regenerative power from the load to the first converter section when providing regenerative power to the energy storage device.
25 Citations
22 Claims
-
1. A vehicle system comprising:
-
a direct current (DC) link; an energy storage device; and a bi-directional DC-DC converter assembly coupled to each of between the energy storage device and the DC link, the bi-directional DC-DC converter assembly comprising; a first converter section coupled to the energy storage device; and a second converter section coupled to the DC link and the energy storage device; wherein the bi-directional DC-DC converter assembly is configured to; process a first portion of power received from the energy storage device, the processed first portion of power determined by a voltage differential between the energy storage device and the DC link; and provide the processed first portion of power and an unprocessed second portion of power to the second converter section, the unprocessed second portion of power also determined by the voltage differential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A vehicle system comprising:
-
a direct current (DC) link; an energy storage device; a bi-directional DC-to-DC partial power converter coupled between the energy storage device and the DC link; and a controller configured to selectively operate the bi-directional DC-to-DC partial power converter in boost mode to boost a voltage from the energy storage device to the DC link and a buck mode to buck a voltage from the DC link to the energy storage device, the controller programmed to; determine a value of a processed portion of power received by the bi-directional DC-to-DC partial power converter; and determine a value of an unprocessed portion of power received by the bi-directional DC-to-DC partial power converter; wherein the values of the processed and unprocessed portions of power are based on a voltage differential between the energy storage device and the DC link. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A method of transferring power in a vehicle system that includes an energy storage device, a direct current (DC) link, a load, and a bi-directional DC-DC converter assembly, the method comprising:
-
operating the bi-directional DC-DC converter assembly in a boost mode to boost a DC voltage from an output of the energy storage device to the DC link or in a buck mode to buck voltage from the DC link to the energy storage device; wherein operating the bi-directional DC-DC converter assembly in the boost mode or the buck mode comprises; determining a voltage differential between the energy storage device and the DC link; determining a first portion of power received by the bi-directional DC-DC converter assembly to be processed, so as to boost or buck the received power; determining a second portion of power received by the bi-directional DC-DC converter assembly to remain unprocessed; causing the bi-directional DC-DC converter assembly to process the first portion of the received power and leave the second portion of the received power unprocessed; and collectively outputting the processed first portion and unprocessed second portion from the bi-directional DC-DC converter assembly. - View Dependent Claims (17)
-
-
18. A vehicle system comprising:
-
a direct current (DC) link; an energy storage device; and a bi-directional DC-DC converter coupled between the energy storage device and the DC link, the bi-directional DC-DC converter comprising; a first converter section coupled to the energy storage device; and a second converter section coupled to the DC link and the energy storage device; wherein the bi-directional DC-DC converter assembly is configured to; process a first portion of regenerative power received from the DC link, the processed first portion of regenerative power determined by a voltage differential between the energy storage device and the DC link; and provide the processed first portion of regenerative power and an unprocessed second portion of regenerative power to the first converter section, the unprocessed second portion of regenerative power also determined by the voltage differential. - View Dependent Claims (19, 20, 21, 22)
-
Specification