Quantization resolution and limit cycling in digitally controlled PWM converters

被引：462

作者：

Peterchev, AV ^{[1
]}

Sanders, SR ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2003年 / 18卷 / 01期

关键词：

analog-digital conversion; digital control; dither; finite wordlength effects; power conversion; pulse-width modulation; quantization; stability; voltage regulation;

D O I：

10.1109/TPEL.2002.807092

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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. Finally, experimental results confirming the theoretical analysis are presented.

引用

页码：301 / 308

页数：8

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