US 12,461,133 B2
Method for testing switch signals of an inverter of an electric machine controlled via a pulse-width modulation
Huan Fu, Rastatt (DE); Vincent Leonhardt, Haguenau (FR); and Eduard Enderle, Gengenbach (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/274,975
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jan. 12, 2022, PCT No. PCT/DE2022/100015
§ 371(c)(1), (2) Date Jul. 28, 2023,
PCT Pub. No. WO2022/161574, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 10 2021 102 192.8 (DE), filed on Feb. 1, 2021.
Prior Publication US 2024/0142505 A1, May 2, 2024
Int. Cl. G01R 23/09 (2006.01); G01R 29/02 (2006.01); G01R 29/027 (2006.01); G01R 31/00 (2006.01); G01R 31/34 (2020.01); H02P 27/08 (2006.01)
CPC G01R 29/0273 (2013.01) [G01R 23/09 (2013.01); G01R 29/023 (2013.01); G01R 31/006 (2013.01); G01R 31/34 (2013.01); H02P 27/085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for testing switch signals of an inverter of an electric machine of a drive system of a motor vehicle, the method comprising:
controlling the electric machine via a pulse-width modulation generated by a control unit using a target duty cycle and a triangular-waveform voltage sequence;
continuously determining an actual duty cycle of the pulse-width modulation from the switch signals of the inverter of the electric machine; and
comparing the actual duty cycle and the target duty cycle to determine one or more corrections to the target duty cycle.