Title :
Novel random switching PWM with constant sampling frequency and constant inductor average current for digital-controlled power factor corrector
Author :
Lai, Yen-Shin ; Ho, Kung-Min
Author_Institution :
Center for Power Electron. Technol., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
The objective of this paper is to present a random switching method which changes switching frequency while retaining constant sampling frequency. The proposed method can effectively reduce magnitude of PWM harmonics. Experimental results derived from an FPGA-based controller are presented for confirmation. The power factor corrector is with 400 W power rating, 90 V/AC/60 Hz input and 385 V/DC output. Experimental results demonstrate the effectiveness of the proposed random switching technique.
Keywords :
PWM power convertors; digital control; field programmable gate arrays; inductors; power factor correction; FPGA-based controller; PWM harmonic magnitude; constant inductor average current; constant sampling frequency; converter switching frequency; digital-controlled power factor corrector; frequency 60 Hz; power 400 W; random switching PWM technique; voltage 385 V; voltage 90 V; Harmonic analysis; Inductors; Power harmonic filters; Pulse width modulation; Switches; Switching frequency;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2012 IEEE
Conference_Location :
Raleigh, NC
Print_ISBN :
978-1-4673-0802-1
Electronic_ISBN :
978-1-4673-0801-4
DOI :
10.1109/ECCE.2012.6342198
