US 11,971,436 B2
Method and system for determining a phase shift between a phase current and a phase voltage
Andreas Büming, Maxdorf (DE); Christian Salewski, Speyer (DE); Thomas Nikles, Mannheim (DE); Andreas Kappmeier, Mannheim (DE); and Robert Czainski, Zelona Góra (PL)
Assigned to Bombardier Primove GmbH, Berlin (DE)
Appl. No. 17/414,558
Filed by Bombardier Primove GmbH, Berlin (DE)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/085889
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/127446, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1820814 (GB), filed on Dec. 20, 2018.
Prior Publication US 2022/0011354 A1, Jan. 13, 2022
Int. Cl. G01R 25/00 (2006.01); G01R 15/18 (2006.01); H04B 5/00 (2006.01)
CPC G01R 25/00 (2013.01) [G01R 15/181 (2013.01); H04B 5/0037 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for determining a phase shift between a phase current and a phase voltage in an AC phase line of a converter that carries a corresponding phase of an AC output of the converter, wherein a phase current change dependent quantity for the AC phase line is determined, wherein a voltage-specific reference time point for the AC phase line is determined depending on the phase current change dependent quantity, wherein the phase current for the AC phase line is determined, wherein a current-specific reference time point for the AC phase line is determined depending on the phase current, wherein the phase shift is determined depending on the time difference between the voltage-specific reference time point and the current-specific reference time point.