Quantization resolution and limit cycling in digitally controlled PWM converters

Author

Peterchev, Angel V. ; Sanders, Seth R.

Author_Institution

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

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

465

Abstract

This paper discusses the presence of steady-state limit cycles in digitally controlled pulse-width modulation (PWM) converters, and suggests conditions on the control law and the quantization resolution for their elimination. It then introduces single-phase and multi-phase controlled digital dither as a means of increasing the effective resolution of digital PWM (DPWM) modules, allowing for the use of low resolution DPWM units in high regulation accuracy applications. Bounds on the number of bits of dither that can be used in a particular converter are derived

Keywords

PWM power convertors; digital control; quantisation (signal); voltage control; analog-to-digital converter; control law; digitally controlled PWM converters; digitally controlled pulse-width modulation converters; multi-phase controlled digital dither; output voltage control; quantization resolution; single-phase controlled digital dither; steady-state limit cycles; Control systems; Digital control; Digital modulation; Limit-cycles; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Quantization; Steady-state; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual

Conference_Location

Vancouver, BC

ISSN

0275-9306

Print_ISBN

0-7803-7067-8

Type

conf

DOI

10.1109/PESC.2001.954158

Filename

954158