International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 08 | Aug 2025
p-ISSN: 2395-0072
www.irjet.net
Design and Implementation of 80W Dual Output Forward Converter for Spaceborne Power Supply Applications Rakshitha S Nayaka1, A.N. Nagashree2, Gautham Vishal3, Suriya S4, Santosh B L5, Bhoopendra Kumar Singh6 1PG Student, BMS College of Engineering, Bengaluru
2Proffesor, Dept of EEE, BMS College of Engineering, Bengaluru 3Senior Engineer, Centum Electronics Ltd, Bengaluru 4Senior Engineer, Centum Electronics Ltd, Bengaluru 5Assistant Manager, Centum Electronics Ltd, Bengaluru 6Director, Centum Electronics Ltd, Bengaluru
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Abstract- Power supply modules have become an
power output, electrical isolation, and multi-output capability, there are some common objectives for power supply design such as: minimal size, minimal weight and increased efficiency [1].
important part of modern power electronics. They provide stable power delivery for a wide variety of applications. DC-DC power converters are used for various applications and particularly very useful for space application to provide a regulated output power. Among various dc-dc converter topologies the fly-back and forward converters provide isolation and hence more frequently used for space applications, wherein isolation is necessary. The present paper describes the design and implementation of an 80W dual output forward converter with input voltage feed-forward control technique, for a switching frequency of 140kHz. UC2525 PWM controller has been implemented due to its fast response, soft start capabilities, Under-Voltage protection and maximum duty cycle control. The converter is designed with an isolation transformer and a mag-amp for secondary output voltage control. The analysis and hardware implementation of the prototype converter is developed and tested for different input voltages and load conditions at ambient temperature to validate the results.
The DC-DC converter topology consists of Buck, Boost, BuckBoost, Cuk, Sepic, Fly-back, Forward, Half Bridge and Full Bridge Converters. Among these converters, forward converter topology is selected for designing power supply module [1]. It has many advantages over various other topologies such as, good reliability, compact size, more efficient and is often chosen for output power under 200W. For proper load regulation, a magnetic amplifier (mag-amp) has been implemented in the secondary side of the converter. A magnetic amplifier or Mag-Amp is an electronic amplifier that uses magnetic properties to control the flow of electrical current. The Mag-Amp provides robustness and radiation tolerance which makes it well suitable for spaceborne power supply [2]. Implementing a magnetic amplifier (mag-amp) provides several notable advantages such as: i) Large currents can be handled by small core. Also, there is no need for heat sink. This results in smaller mount area, thus achieving miniaturization.
Key Words: DC-DC Converter, Input Voltage Feed-Forward Control, Mag-Amp, Power Supply Module, PWM Controller, Switching Frequency.
ii)The power needed for control of mag-amp is smaller, enabling power to be saved.
1. INTRODUCTION
iii) As the magnetic amplifier is connected in series with a diode, the noise from the output of the diode is less.
A power supply module is a device connected intermediate to power source and electronic load. Its primary function is to convert the electrical energy in the power supply to a suitable form for use by the load. DC-DC converters are used in a wide variety of applications,
iv) Since mag-amps are magnetic parts, the cores are not destroyed by surges in voltage and current. v) The mag-amp realizes precise output voltage because the transformer’s secondary is directly controlled [2].
such as power supplies for computers, consumer electronic devices, UPS, telecommunications equipment etc. A regulated DC power supply is critical for optimal and efficient operation of an electronic system. While most power supplies are designed to deliver the necessary features like regulated
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