Systems and methods for acquiring measurements of rotor temperature of electric machines

A system, comprising:

• a controller configured to:
• receive, via a sensor, a voltage signal associated with one or more windings of a stator in the motor;
• determine a time constant associated with the induced voltage signal based on a decay pattern of the induced voltage signal;
• determine a temperature of a winding of a rotor of the motor based at least in part on the time constant;
• and
• adjust one or more operations of the motor, or conditions under which the motor is operating, based on the temperature.

A method, comprising:

• receiving, via a processor, a voltage signal from one or more sensors, wherein the voltage signal comprises a voltage decay of an induced voltage signal associated with a first winding of a stator of a motor, and wherein the voltage decay is associated with a time period that corresponds to when an electrical supply removes a power supply to the stator;
• determining, via the processor, a time constant associated with the voltage decay;
• determining, via the processor, a temperature of a second winding of a rotor of the motor based at least in part on the time constant;
• and
• adjusting, via the processor, one or more operations of the motor based on the temperature.