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US 10,882,407 B2Granted
Low engine speed electric accessory load regulation on moving vehicles
AssigneeBAE Systems Controls Inc.
InventorsBart W. Mancini, Arthur P. Lyons, Robert J. Vovos
Life of this patent
Estimating the term…
Abstract
Systems and methods for reducing a likelihood that an engine exceeds its torque or power limit at a specific speed are provided. Also provided are systems and methods for reducing a likelihood that DC-DC converters and AC inverters overload a generator at a specific speed.
Claims17
An accessory power system comprising:
- a first inverter coupled to a generator, where the generator is mechanically coupleable to an engine, the first inverter, when the generator is coupled to the engine, is configured to receive AC power from the generator and provide DC power for a first DC link;
- a DC-DC converter coupled to the first DC link and configured to receive the DC power from the first inverter and provide DC power to a second DC link to power a DC accessory, wherein the second DC link is couplable to a battery;
- a second inverter coupled to the first DC link and configured to receive the DC power from the first inverter and provide AC power to an AC accessory;
- and
- a processor configured to:
- control the generator output and cause power to be supplied from the generator to the DC accessory and the AC accessory;
- receive a detected DC voltage on the first DC link;
- compare the detected DC voltage on the first DC link with a DC voltage setpoint for the DC accessory, when the detected DC voltage is less than the DC voltage setpoint, the processor is configured to decrease an output current limit for the DC-DC converter from a baseline value, wherein when the second DC link is coupled to the battery, power to the DC accessory is provided by the battery.
5 more elements
An accessory power system comprising:
- a first inverter coupled to a generator, where the generator is mechanically coupleable to an engine, the first inverter, when the generator is coupled to the engine, is configured to receive AC power from the generator and provide DC power for a first DC link;
- a DC-DC converter coupled to the first DC link and configured to receive the DC power from the first inverter and provide DC power to a second DC link to power a DC accessory, wherein the second DC link is coupleable to battery;
- a second inverter coupled to the first DC link and configured to receive the DC power from the first inverter and provide AC power to an AC accessory;
- and
- a processor configured to:
- receive a detected DC voltage on the first DC link;
- compare the detected DC voltage on the first DC link with a DC voltage setpoint for the DC accessory, when the detected DC voltage is less than the DC voltage setpoint, the processor is configured to decrease an output current limit for the DC-DC converter from a baseline value;
- control the generator output and cause power to be supplied from the generator to the DC accessory and the AC accessory;
- receive a detected speed of the generator;
- compare the detected speed with a threshold,
- when the detected speed is less than the threshold, the processor is configured to lower a torque or power limit for the generator;
- and
- control the generator output based on the lowered torque or power limit.
10 more elements
Dependencies are inferred from the claim text.