초록 ▼

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

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.

대표청구항 ▼

1. A method of maximizing the efficiency of an induction motor, the method comprising the acts of:supplying three phase alternating-current (AC) power to the motor to energize the motor; measuring a direct-current (DC) bus voltage and a DC bus current; determining an estimated phase voltage; determi

1. A method of maximizing the efficiency of an induction motor, the method comprising the acts of:supplying three phase alternating-current (AC) power to the motor to energize the motor; measuring a direct-current (DC) bus voltage and a DC bus current; determining an estimated phase voltage; determining an actual torque producing current value based on the DC bus voltage, the DC bus current and the estimated phase voltage; determining an estimated torque producing current value; comparing the actual torque producing current value with the estimated torque producing current value; determining an error term representing the difference between the actual and estimated torque producing current values; changing the estimated phase voltage value based on the error term; and adjusting the three phase AC power supplied to the motor based on the estimated phase voltage.