Coupled inductor output filter
AssigneeArkansas Power Electronics International, Inc.
InventorEdgar Cilio
Life of this patent
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Abstract
The present invention is directed to a coupled inductor output filter to be used with DC/DC switched mode power supply topologies. This new output filter changes the inherent power sharing capability of most DC/DC converter topologies, enabling the overall converter to operate as a truly modular block with no inter-module communication required to accomplish power/current sharing on a multi-module configuration. The coupled-inductor output filter uses a split inductor, Lout1 and Lout2, a main output capacitor, Cout, and a DC blocking capacitor, CDC Block.
Claims2
A coupled inductor output filter for one or more DC/DC switched mode power supplies with a power output for powering a load with a first load end and a second load end, the filter comprising:
- a coupled inductor including a first inductor coupled to a second inductor;
- the first inductor connected between the power output and the load;
- a first capacitor connected in parallel with the load;
- the second inductor connected in series with a second capacitor to form an inductor capacitor series;
- and
- the inductor capacitor series connected in parallel with the load.
A method of filtering load power requirements for a load supplied by at least one DC power supply, the method comprising:
- providing a coupled inductor including a first inductor and a second inductor;
- connecting the first inductor in series with the load;
- using the second inductor in series with a capacitor to form a high pass filter;
- and
- connecting the high pass filter in parallel with the load such that the coupling of the inductors causes the first inductor to operate in a discontinuous mode.
Dependencies are inferred from the claim text.