Automotive electrical system configuration using a two bus structure
First Claim
1. An automotive electrical system comprising:
- a main bus;
a secondary bus;
a multidirectional electronic power converter connecting the main bus and the secondary bus;
an energy storage device connected to the secondary bus;
an electrical energy generating device connected to the main bus;
at least one critical load connected to one of the main bus and the secondary bus; and
at least one high current load connected to one of the main bus and the secondary bus wherein the high current load is connected to the bus not connected to the critical load;
wherein the multidirectional electronic power converter is configured to maintain a substantially constant voltage on the bus connected to the critical load in response to a voltage dip on the bus connected to the high current load due to a high current transient.
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Accused Products
Abstract
Disclosed herein are a variety of different electrical system topologies intended to mitigate the impact of large intermittent loads on a 12 volt vehicle power distribution system. In some embodiments the intermittent load is disconnected from the remainder of the system and the voltage supplied to this load is allowed to fluctuate. In other embodiments, the voltage to critical loads is regulated independently of the voltage supplied to the remainder of the system. The different topologies described can be grouped into three categories, each corresponding to a different solution technique. One approach is to regulate the voltage to the critical loads. A second approach is to isolate the intermittent load that causes the drop in system voltage. The third approach is to use a different type of alternator that has a faster response than the conventional Lundell wound field machine.
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Citations
35 Claims
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1. An automotive electrical system comprising:
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a main bus;
a secondary bus;
a multidirectional electronic power converter connecting the main bus and the secondary bus;
an energy storage device connected to the secondary bus;
an electrical energy generating device connected to the main bus;
at least one critical load connected to one of the main bus and the secondary bus; and
at least one high current load connected to one of the main bus and the secondary bus wherein the high current load is connected to the bus not connected to the critical load;
wherein the multidirectional electronic power converter is configured to maintain a substantially constant voltage on the bus connected to the critical load in response to a voltage dip on the bus connected to the high current load due to a high current transient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of providing electrical power in an automotive electrical system comprising:
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generating electrical energy;
delivering the generated electrical energy to a first bus;
connecting a second bus to the first bus using a multidirectional DC-DC converter;
storing electrical energy in a battery connected the second bus;
connecting at least one critical load to one of the first bus and the second bus; and
connecting at least one high current load to one of the first bus and the second bus, wherein the high current load is connected to the bus not connected to the critical load;
wherein the multidirectional DC-DC converter is configured to maintain a substantially constant voltage on the bus connected to the critical load in response to a voltage dip on the bus connected to the high current load due to a high current transient. - View Dependent Claims (23, 24, 25)
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26. An automotive electrical system comprising:
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a main bus;
an energy storage device connected to the main bus;
a bidirectional DC-DC converter having a first input connected to the main bus and a second input connected to an electrical energy generating device;
at least one critical load connected to the main bus; and
at least one high current load connected to the second input of the bidirectional DC-DC converter;
wherein the bidirectional DC-DC converter is configured to maintain a substantially constant voltage on the main bus in response to a high current transient caused by the high current load and wherein the high current load is interconnected with a voltage regulator configured to control the output voltage of the electrical energy generating device. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification