Phase Locked Loop based on adaptive observer

Roberto Carlos Martínez Montejano; Raúl Castillo Meraz; Ricardo Eliu Lozoya Ponce; Isaac Campos Cantón; Misael Francisco Martínez Montejano; Rogelio Osvaldo Lozoya Ponce

doi:10.15866/iree.v9i1.221

Phase Locked Loop based on adaptive observer

Roberto Carlos Martínez Montejano^(1*), Raúl Castillo Meraz⁽²⁾, Ricardo Eliu Lozoya Ponce⁽³⁾, Isaac Campos Cantón⁽⁴⁾, Misael Francisco Martínez Montejano⁽⁵⁾, Rogelio Osvaldo Lozoya Ponce⁽⁶⁾

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Abstract

A phase Locked Loop is a control system that generates an alternating signal with a bounded phase respect to an input signal, a feedback loop makes a comparison between these two signals and modifies its output signal frequency. This paper presents a PLL scheme which is aimed to estimate the angular frequency of the input voltage as well as a low pass filter function for cleaning this distorted signal. A prototype based on operational amplifiers has been built and simulations and experimental results are presented to prove its performance
Copyright © 2014 Praise Worthy Prize - All rights reserved.

Keywords

adaptive law, harmonic oscillator, Lyapunov approach, PLL, operational amplifier.

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