Constant Delay-Line Repetitive Control Analysis for Variable Frequency Operation

The proposed paper deals with the complete analysis which is basis of common tuning procedure variable sampling Repetitive Controllers for adjustable output frequency applications. described approach can be applied without limitations to grid-tied inverters (narrow variations), as well AC waveform generators (wide variations). operation keep Control main delay line at a constant size, resulting in very suitable implementation on FPGA-based control platforms. effects desynchronization between PWM modulator and Loop will accurately described, inherent delays expressed closed form. Additional effects, like beating frequencies, are illustrated by closed-form expressions. Experimental verification carried out prove effectiveness presented analysis.