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US 2011/0235373 A1Published application
Active switching ripple filter
AssigneeHamilton Sundstrand Corporation
InventorsMiaosen Shen, Vladimir Blasko
Life of this patent
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Abstract
An active switching ripple filter system removes ripple currents from a power signal and has a main inverter and an active switching ripple filter inverter whose outputs are combined to form an output power signal.
Claims20
A power generation system comprising:
- a power source;
- a main inverter electrically coupled to said power source;
- an active switching ripple filter inverter coupled to said power source;
- a first set of filter inductors connected to an output of said main inverter;
- a second set of filter inductors connected to an output of said active switching ripple filter inverter;
- and
- an electrical node combining an output of said first set of inductive filters and an output of said second set of inductive filters.
4 more elements
A method for generating a ripple current free power signal comprising:
- operating a main inverter at a first switching frequency;
- operating an active switching ripple filter at a second switching frequency;
- filtering an output of said main inverter in a first set of filter inductors;
- filtering an output of said active switching ripple filter in a second set of filter inductors;
- and
- combining an output of said first set of filter inductors and an output of said second set of filter inductors, thereby creating an output power signal.
3 more elements
An active switching ripple filter comprising;
- an inverter component having a power signal output;
- a set of filter inductors connected to said power signal output and configured to convert said power signal output into a different waveform;
- and
- a controller controllably coupled to said active switching ripple filter and capable of controlling a switching frequency of said inverter component and a magnitude of said power signal output and said controller being communicatively coupled to an external inverter such that said controller can detect at least a power output and frequency of said external inverter.
1 more element
Dependencies are inferred from the claim text.