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This paper aims at design and implementation of light weight, smaller size, highly efficient and reliable single output DC-DC converter for defence application. To achieve miniaturization of the converter high switching frequency is selected, which in turn reduces the mass, size of magnetic and output filter components‥ To overcome the limitation of 50% duty cycle in auxiliary winding reset forward...
This work is focused on design, analysis and implementation of current mode controlled, quad-output flyback converter. The design of proposed converter illustrates the achievement of tight line, load and cross regulation by using post regulators. The proposed converter is operated at a switching frequency of 100 KHz. The UC1846 PWM controller is used which has features of pulse by pulse current limiting...
This paper aims at design and development of multiple output forward converter with magnetic amplifier (Mag-amp) post regulators and voltage feed forward control for space application. Mag-amp regulates the output against any load variations and provides good load regulation. Voltage feed forward control is used to achieve good line regulation as the duty ratio varies directly as the input voltage...
Energy regenerative snubber for forward converter topology is presented. The proposed snubber is non-dissipative as it does not contain any resistive element. It is capable of resetting the transformer core along with reducing the spike across the power switch due to leakage inductance of the transformer. It exploits the transformer leakage inductance beneficially in resetting the transformer core...
The developments in the integrated circuits technology led to the emergence of highly efficient and reliable DC-DC converters in wide range of power (few Watts to kilowatts). The low power application demands the use of flyback converter to implement the converter. The need of the higher efficiency at low power level requires the use of new improved rectification technology to reduce the rectification...
This paper is a conversion solution to an advanced development of critical power supply systems in military application. A compact size high power density i.e. 25.26 watt/inch3 DC-DC converter is designed and developed. An appropriate topology of a ZVS based Phase Shifted full -bridge DC-DC converter is selected based on advantages of reduced switching losses and stresses with fixed switching frequency...
This paper is aimed at the design and implementation of a high frequency, multiple output, and miniaturized converter for military applications. The implementation is done using the flyback topology in order to make the converter module compact. The proposed converter design illustrates how to achieve better line, load and cross regulations using post regulators. The converter is operated at a switching...
This paper deals with design and development of high frequency, high power Resister, Capacitor and Diode (RCD) clamp forward converter for Radar application. RCD clamp reset technique is used to reset the energy stored in the transformer during turn off. It is less expensive than using a tertiary winding, and as it allows duty cycle excursions above 50% and it greatly improves the behaviour in half-cycle...
Miniaturized high density i.e., 18.6Watt/inch3 DC DC Converter is designed and developed for military applications such as On Board Computers (OBC) and Missile Interface Unit (MIU). The converter topology used is Resonant Reset Forward Converter operating at a frequency of 350 kHz with current mode control technique. The selection of resonant reset forward converter is due to its simplicity in design,...
This paper is aimed at design and development of fixed high frequency Forward Converter Topology operating at resonant reset mode for Space applications. This self-resonant reset mechanism eliminates power loss in the reset circuit, thus simplifying circuitry and increasing efficiency. The galvanic isolation between input and output is implemented with magnetic feedback which is insensitive to component...
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