US 9,812,862 B2
Paralleling of active filters with independent controls
Ian Wallace, Whitefish Bay, WI (US); Ashish Bendre, Shorewood, WI (US); William Kranz, Fox Point, WI (US); and Jeff Seibold, West Allis, WI (US)
Assigned to TCI, LLC, Germantown, WI (US)
Filed by TCI, LLC, Germantown, WI (US)
Filed on Jul. 24, 2015, as Appl. No. 14/808,533.
Application 14/808,533 is a division of application No. 14/146,324, filed on Jan. 2, 2014, granted, now 9,099,916.
Claims priority of provisional application 61/748,382, filed on Jan. 2, 2013.
Prior Publication US 2015/0333614 A1, Nov. 19, 2015
Int. Cl. H02J 3/01 (2006.01); H02M 1/15 (2006.01); H02J 3/18 (2006.01); H02M 1/12 (2006.01)
CPC H02J 3/01 (2013.01) [H02J 3/1821 (2013.01); H02M 1/12 (2013.01); H02M 1/126 (2013.01); H02M 1/15 (2013.01); H02M 2001/123 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A parallel filter arrangement, for use with a circuit having at least one source, producing a source current, and at least one load connected to the parallel filter arrangement, the parallel filter arrangement comprising:
a first filter capable of producing a first current;
a second filter capable of producing a second current;
a first current sensor producing a first signal indicating the first current;
a second current sensor producing a second signal indicating the second current;
a third current sensor producing a third signal representing the source current and located upstream from the first and second filters;
means for producing a fourth signal representing a sum of the first current and the source current and located upstream from the second filter and downstream from the first filter;
wherein the first filter produces the first current and supplies the first current to the circuit based at least in part upon the first signal and the third signal, and the second filter produces the second current and supplies the second current to the circuit based at least in part upon the second signal and the fourth signal.