Dc to dc converter output bus voltage control system
AssigneeRolls-Royce North American Technologies Inc.
InventorsAndrew Bollman, Eric Duane Schneider
Life of this patent
Estimating the term…
Abstract
A system includes a DC to DC converter coupled with a load, a power source bus coupled with an input of the DC to DC converter, a capacitor coupled in parallel across an output of the DC to DC converter and a controller. The controller may dynamically adjust a bus voltage set point of a bus voltage on the output of the DC to DC converter up or down to prepare for supply of the bus voltage and energy stored in the capacitor to an anticipated load event. The load event may have a load step change that occurs in less than five milliseconds and is greater than about eighty or eighty-five percent of a rated output of the DC to DC converter.
Claims20
A system comprising:
- a DC to DC converter coupled with a load;
- a power source bus coupled with an input of the DC to DC converter;
- a capacitor coupled in parallel across an output of the DC to DC converter;
- and
- a controller configured to dynamically adjust a bus voltage set point of a bus voltage on the output of the converter up or down to prepare for supply of the bus voltage and energy stored in the capacitor to an anticipated load event having a load step change that occurs in less than about 5 milliseconds and is greater than about 85% of a rated output of the DC to DC converter.
A method of bus voltage control comprising:
- receiving at a controller an indication of an anticipated load event, the anticipated load event being a step change in load of greater than about 85% that dynamically occurs over a time period of about 5 milliseconds or less;
- adjusting, by the controller, an output voltage of a DC to DC converter from a nominal voltage to a predetermined voltage value in response to receipt of the indication of the anticipated load event;
- discharging a capacitor coupled in parallel across an output of the DC to DC converter when the output voltage of the DC to DC converter drops in response to the step change in load being a step change increase in load of greater than about 85% that dynamically occurs over a time period of about 5 milliseconds of less;
- and
- charging the capacitor coupled in parallel across the output of the DC to DC converter when the output voltage of the DC to DC converter rises in response to the step change in load being a step change decrease in load of greater than about 85% that dynamically occurs over a time period of about 5 milliseconds of less.
A system comprising:
- a DC to DC converter being supplied by a power source, the DC to DC converter comprising an output configured for supply of an output voltage to a load;
- a controller configured to monitor for a signal indicative of an imminent step change in the load, the imminent step change being greater than about an 85% change in load, and occurring in a period of time of about 5 milliseconds or less;
- a capacitor coupled in parallel at the output of the DC to DC converter;
- the controller configured to regulate the output voltage to one of a predetermined minimum rated voltage of the load, or to a predetermined maximum rated voltage of the load, or to a predetermined nominal rated voltage of the load, the output voltage regulated in dependence upon the signal indicative of the step change and the capacitor sized to supply power to the load during transition from the predetermined maximum voltage to the predetermined minimum voltage, or absorb power from the load during transition from the predetermined minimum voltage to the predetermined maximum voltage.
Dependencies are inferred from the claim text.