Patent ID: 7701165

Claim:
An induction motor controller, comprising: three phase paths leading from a power input to a power output; a silicon-controlled rectifier (SCR) interposed between the power input and the power output on each of the three phase paths; a voltage sensor coupled to two of the phase paths and configured to measure line-to-line voltage; a current sensor on one of the phase paths; a processor communicatively coupled to the voltage sensor, the current sensor, and the SCRs; and a memory coupled to the processor, wherein the processor is configured to characterize a generally static motor by both rendering at least one of the SCRs conductive at a desired phase angle of a power supply coupled to the power input and calculating both motor resistance and motor inductance based on a signal from the voltage sensor and a signal from the current sensor, and wherein the processor is configured to store the calculated motor resistance and motor inductance in the memory.