Integrated Fault Isolation and Prognosis System for Electric Drive System

A method for detecting and mitigating faults in an electric drive system of a vehicle, the method comprising:

• sensing, using a position sensor, a rotor position of a motor of the electric drive system of the vehicle;
• receiving DC power and supplying AC power to the motor using an inverter;
• sensing, using a plurality of sensors, at least one of current and voltage supplied to the motor by the inverter;
• controlling the inverter to control the motor based on data received from the position sensor and the plurality of sensors and based on a torque command;
• estimating a motor torque based on the DC power and motor speed using a model of the motor;
• calculating the motor torque based on the sensed current and based on a magnetic flux of the motor determined based on the sensed current;
• generating a first state of health for the electric drive system based on a difference between the estimated and calculated motor torques;
• generating, in response to the first state of health being less than or equal to a first threshold, a second state of health for at least one of the position sensor, the plurality of sensors, and the motor;
• and
• determining whether one of the position sensor, the plurality of sensors, and the motor is faulty based on a combination of the first state of health and the second state of health.