Adaptive phase compensator for current harmonic control in AC motor electric drive systems.

Abstract

The invention proposes a system for controlling and compensating for current harmonics in an AC motor electric drive system. The system includes an automatic phase compensation angle determination method, in which a selection table is automatically constructed based on the motor's operating parameters. The phase compensation angle is calculated from this selection table with input parameters including the electromagnetic torque and angular velocity of the motor's moving part. The method of determining the phase compensation angle adapts to velocity and load, significantly improving the phase margin of the closed-loop current control circuit. This ensures the stability and operating efficiency of the electric drive system throughout its operating range.

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