Systems and methods for analyzing frequency components of stator current of a motor operating at varying conditions

A system for controlling an operation of an induction motor, wherein the induction motor comprises circuitry and a memory, wherein the memory, having instructions stored thereon that, when executed by the circuitry, causes the system to:

• collect time-domain measurements of a stator current of the induction motor operating under varying conditions;
• transform the time-domain measurements into a spectral domain using a sequence of short-time Fourier transforms (STFTs) based on sliding time windows over the time-domain measurements;
• perform spectral analysis in the spectral domain of the stator current to determine harmonics of different types present in the stator current of the induction motor and stabilize the determined harmonics to a shape of corresponding harmonics of the induction motor when operating under steady-state conditions by compensating speed-dependent frequency shifts of the harmonics across the sliding time windows to align the harmonics into a speed-independent spectral representation;
• and
• perform one or a combination of control, fault detection, and/or monitoring of the induction motor based on the stabilized harmonics of the induction motor.