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In General, the dispersed power supply system is possible to be robust and small compare with centralized power system. In the satellite system, we aim to downsize the power supply system by using the dispersed power system and cooperative control, which is constructed by solar panel and some bi-directional DCDC converters. In this paper, we describe the evaluation results for the behavior of the...
Thermoelectric power generation systems directly transform thermal energy into electric energy using thermoelectric conversion elements. However, the performance enhancement of thermoelectric conversion materials is difficult now. Moreover, generation efficiency is low because the heat loss occurs in a device. Therefore the heat electric conversion system is hardly used. To reduce the heat loss in...
This paper proposes the power management unit used for the dc feeder in a house. The simulation results show the 7% reduction of the battery Wh rating.
A laser 2-focus velocimeter (L2F) has been applied for measurements of velocity and size of droplets in the dense region of diesel fuel spray under the atmospheric pressure condition. The fuel mass distribution in the spray obtained by the measurement was compared with the one simulated by using 3D-CFD code KIVA-3V. The radial velocity of spray droplets near the injector nozzle in the KIVA-3V code...
This paper describes the new soft-switching boost-type dc-dc converter with the coupling inductor for the continuous current mode operation. This configuration enables zero current switching at turn-on in continuous current mode operation. The coupling inductor can commutate the primary side current at turn-off to realize the zero current switching at turn-on and can suppress the overvoltage of the...
Photovoltaic (PV) systems are rapidly gaining acceptance as some of the best alternative energy sources. In installation area of large PV/battery system, it requires appropriate operation for example of a method considering power output fluctuation and insolation forecasts errors. In addition, it is better to minimize the size of battery and its capital cost. This paper proposes an optimization approach...
This paper proposes a single-phase bidirectional buck-boost-inverter topology. The boosting function is achieved by using a wide range of duty cycles based on the front-end buck-boost converter characteristics. The two main switches operate at 20 kHz to generate a unipolar half-cycle sinusoidal waveform. The fundamental frequency switched full-bridge inverter block converts the unipolar output of...
In a smart energy system, power converters should be controlled by complex control software. However the efficient development of reliable control software is difficult. We have proposed to introduce a “model-based design” process using MATLAB/Simulink, established in the automotive and aerospace fields, to the development of power electronics systems. However, it was difficult in the past because...
The purpose of this paper is to present a multi-inverter control technique to achieve fast dynamics and current sharing. The system is designed for back-up power system applications, especially for base station, etc. The multi-inverter system consists of one master module and several slave modules. The master module is with voltage and current control. The voltage controller is with proportional and...
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