A comparison of nondeterministic and deterministic switching methods for DC-DC power converters

被引：29

作者：

Hui, SY ^{[1
]}

Shrivastava, Y ^{[1
]}

Sathiakumar, S ^{[1
]}

Tse, KK ^{[1
]}

Chung, HSH ^{[1
]}

机构：

[1] Univ Sydney, Dept Elect Engn, Sydney, NSW 2007, Australia

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 1998年 / 13卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1109/63.728332

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：

An analysis and experimental results of the random pulsewidth modulation (RPWM) and random pulse-position modulation (RPPM) methods for de-de converters are presented. The characteristics and performance of power converters under two randomized modulations are evaluated. The theoretical relationships of discrete harmonics, continuous noise, and output-voltage ripple of the RPWM and RPPM schemes are established and compared with those of a standard deterministic pulsewidth modulation (PWM) scheme in a buck converter. Limitations in the randomly switched de-de converters, which have not been addressed before? are highlighted. Randomized schemes generally have inherent problems in achieving low-output-voltage ripple due to the low-frequency continuous noise within the passband of the converter filter. The inherent low-frequency noise-induced voltage ripple problems of nondeterministic switching methods for de converters are confirmed experimentally. The performance of the RPPM method is found to be closer to the standard PWM method than that of the RPWM method. For de-de power conversion, the RPPM method offers much better output-voltage performance than the RPWM method.

引用

页码：1046 / 1055

页数：10

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