Fault Diagnosis of DC-Link Capacitors in Three-Phase AC/DC PWM Converters by Online Estimation of Equivalent Series Resistance

被引：147

作者：

Pu, Xing-Si ^{[1
]}

Thanh Hai Nguyen ^{[2
]}

Lee, Dong-Choon ^{[2
]}

Lee, Kyo-Beum ^{[3
]}

Kim, Jang-Mok ^{[4
]}

机构：

[1] Adv Dr Technol Co Ltd, Gunpo 435862, South Korea

[2] Yeungnam Univ, Dept Elect Engn, Kyongsan 712749, South Korea

[3] Ajou Univ, Div Elect & Comp Engn, Suwon 443749, South Korea

[4] Pusan Natl Univ, Sch Elect Engn, Pusan 609735, South Korea

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2013年 / 60卷 / 09期

关键词：

AC/DC pulsewidth-modulation (PWM) converters; current measurement; dc-link capacitor; equivalent series resistance (ESR); estimation; fault diagnosis; monitoring; recursive least squares (RLS); temperature sensing; ELECTROLYTIC CAPACITORS; VOLTAGE; PREDICTION;

D O I：

10.1109/TIE.2012.2218561

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a novel scheme for the estimation of the equivalent series resistance (ESR) of the dc-link electrolytic capacitor in three-phase ac/dc pulsewidth-modulation converters is proposed for condition monitoring. First, a controlled ac current component is injected into the input. Then, it induces ac voltage ripples on the dc output. By manipulating these ac voltage and current components with digital filters, the value of the ESR can be calculated, where the recursive least squares algorithm is used for reliable estimation results. In addition, the value of the ESR is corrected by considering the temperature effect, for which a simple temperature-sensing circuit has been designed. The simulation and experimental results show that the estimation error of the ESR is within a reasonable range, thereby enabling the determination of the appropriate time for the replacement of the capacitor.

引用

页码：4118 / 4127

页数：10

共 32 条

[11] Life prediction modeling of bus capacitors in AC variable-frequency drives [J].