[논문]A Study on the Smoke Removal Characteristics of the ESP Adopting Resonant dc-dc Converter

Kim, Su-Weon; Park, Jong-Woong; Joung, Jong-Han; Chung, Hyun-Ju; Choi, Jin-Young; Kim, Hee-Je

A Study on the Smoke Removal Characteristics of the ESP Adopting Resonant dc-dc Converter 원문보기

KIEE international transactions on electrophysics and applications, v.4C no.5, 2004년, pp.193 - 200

Kim, Su-Weon (Dept. of Electrical Engineering, Pusan National University) , Park, Jong-Woong (Dept. of Electrical Engineering, Pusan National University) , Joung, Jong-Han (Dept. of Electrical and Electronic Engineering, Changwon College) , Chung, Hyun-Ju (Dept. of Electrical Engineering, Pusan National University) , Choi, Jin-Young (Dept. of Electrical Engineering, Pusan National University) , Kim, Hee-Je (Dept. of Electrical Engineering, Pusan National University)

Abstract ▼ AI-Helper

In this study, we propose a small high voltage power supply, which uses a half-bridge ZCS resonant and Cockroft-Walton circuit as its ESP (Electrostatic Precipitator). This power supply transfers energy from the ZCS resonant inverter to the step-up transformer. The transformer secondary is then applied to the Cockroft-Walton circuit for generating high voltage as a discharging source of electrodes. It is highly efficient because its amount of switching losses are reduced by virtue of the current resonant half-bridge inverter, and also due to the small size, low parasitic capacitance in the transformer stage owing to the low number of winding turns of the step up transformer secondary combined with the Cockroft-Walton circuit. Using this power supply, experiments have been carried out as a function of the switching frequency and duty ratio in order to investigate the smoke removal characteristics. From these results, the best operational condition is obtained at the switching frequency of 9 kHz and the duty ratio of 50% in this ESP.

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가설 설정

The inverter switches may be in one of three different configurations at any given time; 1) SI may be closed (on) while S2 is open (off), 2) SI may be open while S2 is closed, or 3) both switches may be open.

제안 방법

In this study, we fabricated a small high power supply for ESP, which uses a half-bridge ZCS resonant inverter and Cockroft-Walton voltage multiplier. The electric energy from the ZCS resonant inverter was transferred to the step-up transformer and the transformer secondary was applied to a voltage multiplier for generating high voltage as a discharge source of the electrode.
In this study, we proposed an electrostatic precipitator (ESP) adopted dc-dc converter system with the current resonant half-bridge inverter and the Cockcroft-Walton circuit.
The purpose of this study is to investigate the smoke removal characteristics of a ZCS dc-dc converter using a Cockroft-Walton circuit, which has been manufactured and tested in a laboratory. Accordingly, we introduce dirty gas containing particulate pollutants into the test chamber and investigate the smoke removal characteristics by adjusting the frequency and duty ratios from an identical test environment.

대상 데이터

The circuit consists of a high power resonant inverter in half-bridge configuration, a high frequency step-up transformer and a high voltage rectifier using a Cockroft- Walton voltage multiplier.

성능/효과

1. As the switching frequency changes from 2 to 12 kHz, the least smoke removal time is obtained at the switching frequency of 9 kHz at the condition of all the duty ratios and the applied voltage of 3.4 kV.
2. As the duty ratio changes from 20 to 80% at the condition of switching frequency (9 kHz), the least smoke removal time obtained is 2.56s at the duty ratio of 50% and the applied voltage of 3.4 kV.
3. From these experimental results, the best operational condition is obtained at the switching frequency of 9 kHz and the duty ratio of 50 % in this ESP.

참고문헌 (6)

S. Cristina and M. Feliziani, Industry Applications Society Annual Meeting, 1991.; Conference Record of the 1991 IEEE, 28 Sept.-4 Oct. 1991 pp. 616-621 vol.1
A. Zukeran, P.C. Looy, A. Chakrabarti, A.A. Berezin, S. Jayaram, J.D. Cross, T. Ito and Jen-Shih Chang; Industry Applications, IEEE Transactions on, Volume: 35 Issue: 5, Sept.-Oct. 1999 pp. 1184-1191
A. Mizuno, Dielectrics and Electrical Insulation, IEEE Transactions on 'see also Electrical Insulation, IEEE Transactions on' , Volume: 7 Issue: 5, Oct. 2000 pp: 615-624
D. Brocilo, J.S. Chang, R.D. Findlay, Y. Kawada and T. Ito, Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on , 14-17 Oct. 2001 pp. 681 -684
Y. Kotov, G. Mesyats, S. Rufkin, A. Filatov, and S. Lyubutin, 'A novel nanosecond semiconductor opening switch for megavolt repetitive pulsed power technology: Experiment and application,' in Proc IX Int. IEEE Pulsed Power Conf., Albuquerque. NM, 1993. pp. 134-139
R.L. Steigerwald, Industrial Electronics, Control, and Instrumentation, 1995., Proceedings of the 1995 IEEE IECON 21st International Conference on, Volume: 1, 6-10 Nov. 1995 pp. 1 -7 vol.1

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