A general constant-frequency pulsewidth modulator and its applications

Author

Lai, Zheren ; Smedley, Keyue Ma

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA

Volume

45

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

386

Lastpage

396

Abstract

Constant-frequency pulsewidth modulation (PWM) is the most frequently used method in the control of switching converters. This paper proposes a general PWM modulator that realizes various control schemes with either trailing-edge or leading-edge modulation. Based on that a general double-edge modulator ran be constructed. The proposed modulator is applied to feedforward control of a family of converters, current-mode control with linear or nonlinear compensating slope, and a family of unity-power-factor rectifiers at continuous or discontinuous conduction mode to demonstrate its generality. Experimental and PSPICE verifications are provided

Keywords

PWM power convertors; SPICE; modulators; power factor correction; rectifiers; switching circuits; PSPICE; constant-frequency pulsewidth modulator; continuous conduction mode; current-mode control; discontinuous conduction mode; double-edge modulation; feedforward control; leading-edge modulation; linear compensation; nonlinear compensation; switching converter; trailing-edge modulation; unity-power-factor rectifier; Circuits; Error correction; Feedback; Frequency; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switching converters; Voltage control;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.669061

Filename

669061