Method and apparatus of improving the efficiency of an...

Details Method and apparatus of improving the efficiency of an... Method and apparatus of improving the efficiency of an...

H - Electricity

02

P

H02P 23/14 (2006.01) H02K 17/30 (2006.01) H02P 25/02 (2006.01)

Patent

CA 2327579

An apparatus and method of maximizing the efficiency of an induction motor is claimed. Three phase AC power is supplied to energize the motor. A DC voltage and a DC current are measured and used to determine an estimated phase voltage. An actual torque producing current is determined based on the DC voltage, DC current and the estimated phase voltage. An estimating torque producing current value is determined and compared with the actual torque producing current value. An error term representing the difference between the actual and estimated torque producing current values is determined. The estimated phase voltage value is changed based on the error term. The three phase AC power supplied to the motor is adjusted based on the estimated phase voltage.

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