US 11,949,327 B2
Power converter power factor control
Ignacio Castro, Gijón (ES); Ponggorn Kulsangcharoen, Solihull (GB); and Rodrigo Fernandez-Mattos, Solihull (GB)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jun. 13, 2022, as Appl. No. 17/806,717.
Claims priority of application No. 21275081 (EP), filed on Jun. 14, 2021.
Prior Publication US 2022/0399806 A1, Dec. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 1/44 (2007.01); H02M 1/12 (2006.01); H02M 1/42 (2007.01)
CPC H02M 1/4208 (2013.01) [H02M 1/126 (2013.01); H02M 1/44 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A power factor correction circuit comprising:
a global voltage input; and
means for deriving a reference current from the global voltage, the means for deriving including first and second power stages defining two branches, a first branch drawing a current in phase with a load voltage and a second branch drawing a leading phase current which combine to derive the reference current from the global voltage;
whereby the means for deriving the reference current comprises a leading phase admittance cancellation (LPAC) transfer function and a filter, whereby the reference current is derived from a sum of an output of the LPAC transfer function and an output of the filter, such that the power factor correction circuit has a closed-loop admittance transfer function of:

OG Complex Work Unit Math
where the filter has the form:

OG Complex Work Unit Math
where:
ig is a global current;
vs is a global voltage;
Giv is a first power stage transfer function;
Gid is a second power stage transfer function;
Fm is a modulator gain;
kx is an input voltage gain;
Vc is an output of a voltage loop in the power factor correction circuit; and
Vo is a DC voltage.