datasheets.com EBN.com EDN.com EETimes.com Embedded.com PlanetAnalog.com TechOnline.com  
Events
UBM Tech
UBM Tech
Welcome Guest Log In | Register | Benefits

A Modified Sinusoidal Pulse Width Modulation (SPWM) for a Full Digital Power Factor Correction

Authored on: Oct 5, 2005 by In-Hwan Oh, Bob Roohparvar, and Justin Chiang

Technical Paper

0 0
More InfoLess Info
This paper presents a full Digital Power Factor Correction (DPFC) that features a control method based on a Modified Sinusoidal Pulse-Width-Modulation (MSPWM). Specifically, this paper presents Fourier harmonic analysis results of a conventional Discontinuous Current Mode (DCM) boost-type power factor correction and shows the third harmonic problem typically seen with a fixed switching frequency that employs a digital controller. Based on these analysis results, this paper proposes a method of modifying duty control to effectively eliminate the third harmonic.

The harmonic analysis results from the MSPWM method are shown through software simulation. By using proposed the proposed MSPWM with a fixed switching frequency, a good sine current with very low harmonic distortion can be obtained. Furthermore, since the proposed method does not need to sense a line current or voltage, it can be implemented by using a low speed and low priced conventional microcontroller (FMS7401).

0 comments
write a comment

Please Login

You will be redirected to the login page

×

Please Login

You will be redirected to the login page

×

Please Login

You will be redirected to the login page