Patent ID: 7358700
Filing Date: 2008-04-15
Classification: H02P,Y10S

Abstract:
1. An induction motor controller, comprising: a phase path; a power supply voltage sensor coupled to the phase path; a silicon controlled rectifier (SCR) in the phase path; a motor voltage sensor coupled to the phase path; a motor current sensor in the phase path; and an SCR controller communicatively coupled to the power supply voltage sensor, the SCR, the motor voltage sensor, and the motor current sensor, the SCR controller having a processor and a memory, wherein the processor is configured to trigger the SCR a first predetermined time before a supplied voltage crosses zero volts, receive a motor voltage signal from the motor voltage sensor, receive a motor current signal from the motor current sensor, and calculate parameters of an induction motor based on the motor voltage signal and the motor current signal received after triggering the SCR, and wherein the processor is configured to store the parameters in the memory.