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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...
Energy consumption is rapidly increasing with advancing technology. For this reason, solar energy from one of the renewable energy sources should be laid on. Because it can produce electrical energy, such as solar energy, photovoltaic conversion could also be utilized as a source of direct heat. Photovoltaic energy from sunlight most of the systems, the modules are collected by means of, converted...
Since the Great East Japan Earthquake, many people had been worried about power shortages in Japan. There has been more focus to installation of Renewable Energy Sources (RES). In Japan, PV system introduction is promoted by national policy of the government in 2012. However, the large amount of distributed generator causes voltage deviation beyond the statutory range in distribution system. Furthermore,...
The purpose of this paper is to present a novel digital control boundary current mode ac-dc converter. The ac-dc converter is widely used as power factor correction. The ac-dc converter that operates in a boundary current mode has the some advantages. It has capability to achieve low current distortion. The unity power factor is theoretically obtained by the boundary current mode control. In the proposed...
This paper reports test results and reviews for the developed plug and socket-outlet applied to the 400 V dc power systems expected to improve energy efficiency in communication sites, data centers, commercial buildings, and smart energy systems. However, there are some safety issues to use 400 V dc power. The plug and socket-outlet has a unique mechanism based on combination of a permanent magnet...
We propose a boost converter for a stand-alone power supply system using single photovoltaic cell with maximum power point tracking based on two strategies.: ultra-low voltage input, operating energy of the boost converter powered by own output. It realized by discrete parts and low power consumption MCU. The boost converter starts at less than 0.4 V. It also starts at 88W/m2 of sunlight radiation...
An example of circuit design is presented on new concept 2-kVA ac voltage/current regulator with resistive load or inductive load. Any load power-factor is acceptable on inductive load. For output control and input PFC (power-factor correction), new devices “Variable Capacitance Devices” can be utilized. Small dc-dc converters are excellent high-speed driver for these devices.
This paper proposes a new two-stage converter with a coupling capacitor and a coupled inductor. In order to downsize the two-stage converter, two inductors are tightly coupled together. Circuit operation is described in detail. Steady state analysis is performed and confirmed by experiments. It is clarified that the proposed converter has advantages of larger voltage conversion ratio and higher power...
LED lighting is the next wave of evolution in energy efficient lighting solutions. In order to conserve more energy, LED street lighting is quickly become a trend. In Taiwan, the government has established a policy to subsidize the use of LED lighting for road illumination to promote energy-saving measure. As of now, there are more than 30,000 LED lights already in service and more lights will be...
In tandem with the penetration of PHV as well as EV, contact-less power supply system in parking towers have become important subjects. In parking towers, EV and PHV are charged on the traveling pallets, supply power is to be transmitted from the building to travelling pallets. In this paper, high-frequency link AC-AC converter for contact-less power supply system in parking tower is newly proposed...
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