US 12,241,934 B2
Method for supplying power to an inductive load
Thierry Bavois, Toulouse (FR); Florence Capy, Toulouse (FR); and Angelo Pasqualetto, Toulouse (FR)
Assigned to VITESCO TECHNOLOGIES GMBH, Hanover (DE)
Appl. No. 17/288,451
Filed by VITESCO TECHNOLOGIES GMBH, Hanover (DE)
PCT Filed Oct. 25, 2019, PCT No. PCT/EP2019/079138
§ 371(c)(1), (2) Date Apr. 23, 2021,
PCT Pub. No. WO2020/084106, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 1859926 (FR), filed on Oct. 26, 2018.
Prior Publication US 2021/0382110 A1, Dec. 9, 2021
Int. Cl. G01R 31/327 (2006.01); G01R 19/165 (2006.01); G01R 31/52 (2020.01); H02P 29/024 (2016.01)
CPC G01R 31/327 (2013.01) [G01R 19/16571 (2013.01); G01R 31/52 (2020.01); H02P 29/024 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for supplying power to an inductive load using an H-bridge power supply structure including at least four transistors each including at least one switch, and at least one control output coupled to at least two transistors of the at least four transistors, the method comprising:
detecting a first anomaly that is one of a power supply short circuit, an electrical ground short circuit, and a short circuit at the inductive load, and an overcurrent using a DIAG ON diagnostic method in which two respective switches of two transistors of the at least four transistors are in an on state;
obtaining a result that is one of: (i) detecting a second anomaly that is one of the power supply short circuit and the electrical ground short circuit, and (ii) failing to detect a presence of the power supply short circuit and the electrical ground short circuit using a DIAG OFF diagnostic method in which the at least four transistors are in an off state, after the detecting the first anomaly and the overcurrent by measuring a presence of a current flowing through the at least one control output without using one or more of a voltage and a current source external to the H-bridge power supply structure;
comparing the detected first anomaly with the obtained result using the DIAG OFF diagnostic method;
confirming an anomaly diagnosis corresponding to one of the power supply short circuit and the electrical ground short circuit, when the detected first anomaly and the obtained result using the DIAG OFF diagnostic method are determined to match, as a result of the comparing; and
confirming the short circuit at the inductive load, when the detected first anomaly and the obtained result using the DIAG OFF diagnostic method are not determined to match, as a result of the comparing.