Patent ID: 11860239
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A diagnostic system for diagnosing faults in a power inverter, comprising
a power loss estimating module configured to calculate a power loss of one or more components of the power inverter;
a junction temperature estimating module configured to output an estimated junction temperature of the one or more components of the power inverter;
a plurality of temperature sensors configured to sense a plurality of temperatures of a plurality of inverter legs, respectively; and
a health indicator generating module configured to generate a plurality of health indicators in response to the estimated junction temperature and the plurality of sensed temperatures of the plurality of inverter legs; and
a fault identification module configured to selectively identify one of an inverter fault, a temperature sensor fault, and no fault in response to the plurality of health indicators.