US 12,461,129 B2
Systems and methods for galvanic interface bond detection for inverter for electric vehicle
Srikanth Vijaykumar, Carmel, IN (US)
Assigned to BorgWarner US Technologies LLC, Wilmington, DE (US)
Filed by BorgWarner US Technologies LLC, Wilmington, DE (US)
Filed on Aug. 28, 2023, as Appl. No. 18/456,769.
Prior Publication US 2025/0076347 A1, Mar. 6, 2025
Int. Cl. G01R 19/00 (2006.01); G01R 19/10 (2006.01); G01R 19/165 (2006.01); H02P 27/06 (2006.01)
CPC G01R 19/0038 (2013.01) [G01R 19/10 (2013.01); G01R 19/1659 (2013.01); H02P 27/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
an inverter configured to convert DC power from a battery to AC power, wherein the inverter includes:
a first galvanic isolator separating a primary voltage area from a secondary voltage area, the first galvanic isolator having a first galvanic isolator output path;
a second galvanic isolator separating the primary voltage area from the secondary voltage area, the second galvanic isolator having a second galvanic isolator output path;
a first bias network in the secondary voltage area, and connected to the first galvanic isolator via the first galvanic isolator output path, the first bias network having a first bias network output path;
a second bias network in the secondary voltage area, and connected to the second galvanic isolator via the second galvanic isolator output path, the second bias network having a second bias network output path;
a first amplifier in the secondary voltage area, and connected to the first bias network via the first bias network output path, the first amplifier having a first amplifier output path;
a second amplifier in the secondary voltage area, and connected to the second bias network via the second bias network output path, the second amplifier having a second amplifier output path;
an open connection detector in the secondary voltage area, the open connection detector connected to the first amplifier via the first amplifier output path and connected to the second amplifier via the second amplifier output path,
wherein the open connection detector includes one or more voltage-to-current converters, and
wherein the inverter does not include a noise filter between the first galvanic isolator and the first amplifier, or between the second galvanic isolator and the second amplifier.