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This paper presents a controlled transition bridge (CTB) converter that uses a non-trapezoidal amplitude modulation in attempt to reduce filtering requirement in high-voltage direct current (HVDC) transmission systems. To achieved variable output ac voltage (modulation index control) over wide range, as expected during a black-start, cell capacitor voltage balancing of the CTB converter is decoupled...
The paper presents new topology for flyback converter which can be used for various applications. Generally in a flyback converter there is one primary winding and other secondary winding. But new topology deals with the introduction of tertiary winding which would create multiple outputs on secondary side. On one side there will be traditional DC output and on the other side there will be AC output...
In the recent era, distributed generation, micro grid, and smart grid has gained the attention and has become an important area of research to find solutions to overcome the difficulties raised due to energy crisis. Renewable energies derived from natural sources that are renewed continually and have various forms. Electricity and heat obtained from solar, wind, geothermal, hydropower, biomass, and...
Energy storage (ES) integration into the grid is typically achieved by using single-stage converters interconnected to long series connected strings of battery cells. Such configurations are susceptible to reliability issues as no mechanism exists to address failure of individual battery cells. DC bus fault currents are also excessively large in such systems, which degrades safety and adds complexity...
Focus is on the single-ended primary-inductor converter (SEPIC) topology of the DC/DC converters widely used in power factor correction and renewable energy applications. We propose a passive modular structure of the SEPIC. The main advantage lies in totally passive parallel module use. The base module contains all active elements and a control system. Operation of the modular structure is analyzed...
This paper proposes a novel three-phase interleaved high step-up converter suitable for electric vehicle applications. By integrating an auxiliary circuit, the proposed three-phase converter can achieve a higher voltage-boosting ratio than that of the conventional boost converter and possess lower duty cycle, leading to significantly reduced diode reverse recovery, voltage ratings of power devices...
PEMFC has being applied more and more in automobile and distributed generation for its low corrosion, low-temperature operation and environment-friendship a complex systems and it is expensive. It should be concerned over the control and maintenance of its auxiliary equipments, placement site, restoring of hydrogen and the other when real PEMFC is used. However, PEMFC's volt/ampere external characteristics...
In this paper, a method for reducing the voltage stresses on switching components and power losses in a shunt current source active power filter (CSAPF) is presented. The method is based on the series capacitor structure which is used to block the fundamental supply voltage component. The computational capacitor voltage balancing is studied to compensate the effects of the phase asymmetry. The frequency...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
The asymmetrical half-bridge converter is widely used for PC power supply. However, severe inrush current produces in this converter at start-up. This paper presents start-up inrush current reduction technique of asymmetrical half-bridge DC/DC converter for PC power supply. The proposed asymmetrical half-bridge converter is composed of series connected two link capacitors, center-tapped transformer...
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