Sensorless Control of PWM Converter Using Extended Kalman Filter

확장 칼만 필터를 이용한 PWM 컨버터 센서리스 제어기법

  • 허승민 (포항공과대학교 전자전기공학과) ;
  • 강구배 (포항공과대학교 전자전기공학과) ;
  • 남광희 (포항공과대학교 전자전기공학과)
  • Published : 1999.07.01

Abstract

In the PWM converter, PLL(Phase Locked Loop) is usually used as a tool which senses the angle of input voltage. This is sensitive to nois and needs additional hardware. In this work, we propose a sensorless control scheme of PWM converter using EKF(Extended Kalman Filter). EKF estimates a phase angle of input voltage from nonlinear state equation using measured phase currents. We control power factor and DC-link voltage utilizing the estimated phase angle. We demonstrate the effectiveness of the proposed estimation algorithm through simulations.

Keywords