A dual-source multi-mode power supply system includes a battery power supply, a first DC bus, an electric power generating system and a second DC bus. The battery power supply includes a DC-DC converter circuit configured to convert a first DC voltage into a second DC voltage for supplying power to
A dual-source multi-mode power supply system includes a battery power supply, a first DC bus, an electric power generating system and a second DC bus. The battery power supply includes a DC-DC converter circuit configured to convert a first DC voltage into a second DC voltage for supplying power to the first DC bus. The electric power generating system includes a permanent magnet generator and an active rectifier circuit configured to convert a variable-voltage/variable-frequency output into a constant high-voltage direct current (HVDC) to supply power to a second DC bus. An electronic coordinated control module determines a load request, and controls one or more switch such that the power from the first DC bus and power from the second DC bus are delivered to the loads to satisfy the load request.
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1. A dual-source multi-mode power supply system comprising: a battery power supply including a direct current to direct current (DC-DC) converter circuit configured to convert a first DC voltage supplied by a battery into a second DC voltage that is greater than the first DC voltage;a first DC bus h
1. A dual-source multi-mode power supply system comprising: a battery power supply including a direct current to direct current (DC-DC) converter circuit configured to convert a first DC voltage supplied by a battery into a second DC voltage that is greater than the first DC voltage;a first DC bus having connected to the battery power supply the second DC voltage;an electric power generating system (EPGS) including a permanent magnet generator (PMG) and an active rectifier circuit configured to convert a variable-voltage/variable-frequency output from the PMG into a constant high-voltage direct current (HVDC) output;a second DC bus having connected to the HVDC output;a plurality of switches configured to selectively isolate and cross-couple the first and second DC buses with respect to one another; andan electronic coordinated microcontroller in signal communication with the battery power supply, the electric power generating system and the switches, the coordinated microcontroller configured to determine a load request of at least one of the first and second loads, and to control the plurality of switches such that the power from the first DC bus and power from the second DC bus are delivered to the loads so as to satisfy the load request. 2. The system of claim 1, wherein the coordinated microcontroller determines an overload condition of at least one of the first and second loads, and controls at least one switch among the plurality of switches to cross-couple the first and second DC buses to generate a combined current that is delivered to at least one of the first and second loads experiencing the overload condition. 3. The system of claim 2, wherein in response to determining the first load realizes the overload condition, the coordinated microcontroller opens at least one first switch to disconnect the second load, and closes at least one second switch to cross-couple the first DC bus and the second DC bus so as to deliver the combined current to the first load. 4. The system of claim 2, wherein in response to support the second load that experiences the overload condition, the coordinated microcontroller opens the at least one second switch to disconnect the first load, and closes at least one first switch to cross-couple the first DC bus and the second DC bus so as to deliver the combined current to the second load. 5. The system of claim 2, wherein the coordinated microcontroller determines the overload condition based on a comparison between the HVDC output to the second DC bus and an overcurrent threshold value. 6. The system of claim 5, wherein the coordinated microcontroller controls the DC-DC converter to adjust a first level of the DC-DC converter current output from the DC-DC converter based on a second level of the active rectifier current. 7. The system of claim 6, wherein coordinated microcontroller commands the DC-DC converter to increase the first level of the current output from the DC-DC converter in response to the second level of the current from the active rectifier exceeding the overcurrent threshold value. 8. The system of claim 7, wherein the overcurrent threshold value corresponds to preset rated active rectifier output current. 9. The system of claim 1, wherein the load request indicates a demand to drive the first and second loads independently from one another, and wherein the coordinated microcontroller controls at least one first switch among the plurality of switch to connect the first load to only the first DC bus, and controls at least one second switch among the plurality of switches to connected the second load to only the second DC bus. 10. The system of claim 1, wherein the request indicates a demand to drive the first and second loads from a common bus, and wherein the coordinated microcontroller controls the plurality of switches such that at least one of the first load and the second load are commonly connected to at least one of the first DC bus and the second DC bus. 11. The system of claim 10, wherein in response to the load request indicating a demand to drive the first and second loads using the current output from the DC-DC converter, the coordinated microcontroller disables the active rectifier circuit and controls the plurality of switches such that each of the first and second loads are connected to both the first DC bus and the second DC bus. 12. The system of claim 10, wherein in response to the load request indicating a demand to drive the first and second loads using the active rectifier current, the coordinated microcontroller disables the DC-DC converter circuit and controls the plurality of switches such that each of the first and second loads are connected to both the first DC bus and the second DC bus. 13. The system of claim 1, in response to receiving a request to start an engine, the coordinated microcontroller opens at least one first switch to disconnect the first and second loads from the first and second DC buses, and controls at least one second switch to cross-couple the first and second DC buses so as to combine the DC-DC converter current with the current output from the active rectifier on the second DC bus to start the engine. 14. The system of claim 1, further comprising a battery charging circuit configured to charge a battery included in the battery power supply, wherein the coordinated microcontroller deactivates the DC-DC converter and connects the battery charging circuit to the battery in response to receiving a load request demanding to charge the battery. 15. The system of claim 14, wherein the coordinated microcontroller automatically disconnects the battery charging circuit from the battery and automatically enables the DC-DC converter in response to receiving a load request indicating at least one of an overload condition or a short-circuit condition. 16. The system of claim 1, wherein the coordinated microcontroller determines a short-circuit connection to at least one of the first and second loads, and controls at least one switch among the plurality of switches to disconnect at least one of the first and second loads experiencing the short-circuit condition from the first and second DC buses.
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이 특허에 인용된 특허 (9)
Chung Seung-Myun,KRX ; Kim Ho-Kyoung,KRX ; Whang Juhn-Sub,KRX ; Na Jae-Ho,KRX, Control system of auxiliary power system for a hybrid electric vehicle.
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