US 12,456,927 B2
On-the-fly topology morphing for frequency-multiplier half-bridge operation
Philipp Rehlaender, Paderborn (DE); Roland Unruh, Paderborn (DE); Frank Schafmeister, Warburg (DE); and Joachim Böcker, Berlin (DE)
Assigned to Delta Electronics (Thailand) Public Co., Ltd., Samutprakarn (TH)
Filed by Delta Electronics (Thailand) Public Co., Ltd., Samutprakarn (TH)
Filed on Aug. 22, 2022, as Appl. No. 17/821,191.
Claims priority of application No. 21192465 (EP), filed on Aug. 20, 2021.
Prior Publication US 2023/0077388 A1, Mar. 16, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/08 (2006.01); H02M 3/00 (2006.01)
CPC H02M 3/33573 (2021.05) [H02M 1/08 (2013.01); H02M 3/01 (2021.05)] 15 Claims
OG exemplary drawing
 
1. A full bridge converter-circuit having an H-bridge and a transformer with a transformer core, comprising:
a control circuit for operating the H-bridge in a first operation mode or a second operation mode, wherein the first operation mode is a full bridge operation of the H-bridge and the second operation mode is a frequency multiplier half bridge operation of the H-bridge or wherein the first operation mode is a frequency multiplier half bridge operation of the H-bridge and the second operation mode is a full bridge operation of the H-bridge,
wherein the control circuit is configured that between switching from the first operation mode to the second operation mode a morphing operation mode is applied in which a positive inverter voltage pulse length on a first half-bridge of the H-bridge is determined on the basis of a negative inverter voltage pulse length on a second half-bridge of the H-bridge,
a look up table, LUT, for looking up the positive inverter voltage pulse length on the basis of the negative inverter voltage pulse length;
wherein a functional graph representing the dependency of the positive inverter voltage pulse length on the negative inverter voltage pulse length is V-shaped having a minimum.