International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 09 | Sep 2024
p-ISSN: 2395-0072
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Design and implementation of step-down Forward converter for dual output Sumeet G Zalaki1, Dr. Anitha G S2, Santosh B L3, Bhoopendra Kumar Singh4 1P G Student, RV College Of Engineering, Bengaluru 2Associate Professor, RV College Of Engineering, Bengaluru
3Assistant Manager, Centum Electronics Limited, Bengaluru 4Director, Centum Electronics Limited, Bengaluru
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Abstract - power supply module (PSM) is widely used in
DC/DC converters are known as power converters that convert electrical power provided from a source at a certain voltage level to electrical power at a different level, often providing a regulated output. Various applications like power supplies for computers, various consumer electronic goods, uninterrupted power supplies [UPS], telecommunication units and so on by the DC/DC converters. Regulated DC power supplies are required for better and efficient operation of electronic systems. Most of the power supply are designed to meet the basic requirements like regulated output, electrical isolation and multiple outputs. In addition to these basic requirements, common goals of any power supply design are to reduce the size, weight and to increase efficiency [5-7].
modern power electronics to deliver power to the different applications. In this paper, the use of forward converter topology to design step-down dc-dc converter with the help of transformer (to provide isolation between the input and the output) is proposed for application that require low output ripple, high output current and high conversion ratio. The proposed converter uses new generation SiC MOSFET’s in parallel that have good efficiency and better conduction losses. The operating principle and design producers are presented together with analysis. The selected topology provides a better conversion with less ripple voltage at the output, by which the overall energy stored in the inductor can be decreased and/or increase the efficiency of the converter. The circuit is provided with under voltage protection for which the converter shuts down below the minimum voltage. The converter operation is validated for 80W with 5V/8A for each output, which is simulated in LTSPICE & hardware is successfully tested at 150KHz operating frequency.
The use of SiC MOSFET’s in parallel provides the converters topology with good current handling capacity with the benefits of faster switching characteristics and lower on-state resistance, leading to improved efficiency. The main benefit of the forward converter topology is its increased efficiency over other topologies as a result of lower switching and conduction losses. Electrical isolation between input and output stage is necessary for application where safety is paramount [8].
Key Words: power supply module (PSM), forward converter, high step-down dc-dc converter, under voltage protection, operating frequency
The transformer used in the converter is modelled with magnetizing inductance and dependent sources. By implementing forward converter with wide input range, the current distribution across the parallel MOSFET’s, high efficiency, low switching losses etc, is achieved [9]. The converter is applicable with the benefits in medium to high power application with the power rating of less than 200W and which require high efficiency with optimal switching condition [10]. The block diagram of the forward dc-dc converter as shown in Fig-1.
1. INTRODUCTION Power supply module is an interface between power source and the electronic load. The primary purpose of the power supply unit is to modulate or convert the available electrical energy from the power supply into the form required by the load [1]. It is quite rare that the power source directly matches the requirements of a particular load. So, the power supply units find extensive applications that play a crucial part in modern power electronics (like battery operated devices, power supply design, renewable energy system, etc.) that require high conversions ratio. Typically, a high step-down transformer with isolated Pulse-Width-Modulation (PWM) IC plays a major part in the voltage conversion [2-4].
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