US 12,407,161 B2
Method for controlling an inverter comprising selecting a safety mode
Julien Lau You Hin, Nogent sur Marne (FR); and Michael Chemin, La Queue en Brie (FR)
Assigned to Nidec PSA Emotors, Carrieres sous Poissy (FR)
Appl. No. 18/842,008
Filed by NIDEC PSA EMOTORS, Carrieres sous Poissy (FR)
PCT Filed Feb. 15, 2023, PCT No. PCT/FR2023/050202
§ 371(c)(1), (2) Date Aug. 27, 2024,
PCT Pub. No. WO2023/187274, PCT Pub. Date Oct. 5, 2023.
Claims priority of application No. 2202964 (FR), filed on Mar. 31, 2022.
Prior Publication US 2025/0112453 A1, Apr. 3, 2025
Int. Cl. H02H 7/08 (2006.01); H02H 3/02 (2006.01); H02H 7/122 (2006.01); H02M 1/32 (2007.01); H02M 7/5387 (2007.01); H02P 29/024 (2016.01); H02P 29/032 (2016.01)
CPC H02H 7/08 (2013.01) [H02H 3/023 (2013.01); H02H 7/122 (2013.01); H02M 1/325 (2021.05); H02M 7/5387 (2013.01); H02P 29/024 (2013.01); H02P 29/032 (2016.02)] 14 Claims
OG exemplary drawing
 
11. A system comprising an inverter and an electric machine controlled by the inverter, the inverter comprising electronic switches, the system further comprising a high-voltage bus,
the system comprising a first control device adapted to control the inverter in a nominal operating mode and a second control device adapted to control the inverter when the first control device fails,
the second control device being adapted to apply a safety operating mode to the inverter, wherein the safety mode is chosen from:
an Active Short Circuit (ASC) mode in which certain electronic switches of the inverter are closed so as to short-circuit phases of the electric machine; and
a freewheeling (FW) mode in which all the electronic switches of the inverter are open,
wherein the system comprises a device for determining the voltage (UHVDC) on the high-voltage bus;
wherein, the second electronic control device is configured such that:
if the voltage (UHVDC) is below a first voltage threshold (Uth1), FW mode is applied,
if the voltage (UHVDC) exceeds a second voltage threshold (Uth2) which is higher than the first voltage threshold (Uth1), ASC mode is applied, and
if the voltage (UHVDC) is between the first voltage threshold (Uth1) and the second voltage threshold (Uth2) inclusive, a parameter is determined which is distinct from the voltage on the high-voltage bus and representative of the possibility of injecting energy by the electric machine into said high-voltage bus without risk, an absence of risk being determined when the parameter is below a parameter threshold value; wherein
if the parameter is greater than or equal to the parameter threshold value, ASC mode is applied; and
if the parameter is below the parameter threshold value, FW mode is applied.