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Mohamed Salem
Universiti Teknologi Malaysia
Control & Systems Engineering Electrical & Electronics Engineering

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ZVS Full Bridge Series Resonant Boost Converter with Series-Connected Transformer Mohamed Salem; Awang Jusoh; N.Rumzi N. Idris; Tole Sutikno; Iftikhar Abid
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 2: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1036.651 KB) | DOI: 10.11591/ijpeds.v8.i2.pp812-825

Abstract

This paper presents a study on a new full bridge series resonant converter (SRC) with wide zero voltage switching (ZVS) range, and higher output voltage. The high frequency transformer is connected in series with the LC series resonant tank. The tank inductance is therefore increased; all switches having the ability to turn on at ZVS, with lower switching frequency than the LC tank resonant frequency. Moreover, the step-up high frequency (HF) transformer design steps are introduced in order to increase the output voltage to overcome the gain limitation of the conventional SRC. Compared to the conventional SRC, the proposed converter has higher energy conversion, able to increase the ZVS range by 36%, and provide much higher output power. Finally, the a laboratory prototypes of the both converters with the same resonant tank parameters and input voltage are examined based on 1 and 2.2 kW power respectively, for veryfing  the reliability of the performance and the operation principles of both converters.
Phase-shifted Series Resonant Converter with Zero Voltage Switching Turn-on and Variable Frequency Control Mohamed Salem; Awang Jusoh; Nik Rumzi Nik Idris; Tole Sutikno; Yonis.M.Yonis Buswig
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 3: September 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v8.i3.pp1184-1192

Abstract

This paper presents a phase shifted series resonant converter with step up high frequency transformer to achieve the functions of high output voltage, high power density and wide range of Zero Voltage Switching (ZVS). In this approach, the output voltage is controlled by varying the switching frequency. The controller has been designed to achieve a good stability under different load conditions. The converter will react to the load variation by varying its switching frequency to satisfy the output voltage requirements. Therefore in order to maintain constant output voltage, for light load (50% of the load), the switching frequency will be decreased to meet the desired output, while for the full load (100%) conditions, the switching frequency will be increased. Since the controlled switching frequency is limited by the range between the higher and lower resonant frequencies , the switches can be turned on under ZVS. In this study, a laboratory experiment has been conducted to verify the effectiveness of the system performance.
Co-Authors Awang Jusoh Iftikhar Abid N.Rumzi N. Idris Nik Rumzi Nik Idris Tole Sutikno Yonis.M.Yonis Buswig