A power packet dispatching system is expected to be one of the advanced power distribution systems for controlling electric power, providing energy on demand, and reducing wasted energy consumption. In this paper, power packet routers are designed and experimentally verified for realizing a networked power packet distribution system. While the previously developed router directly forwards the power packet to a load, the new router forwards the packet to the other router with an information tag reattached to the power payload. In addition, the new router can adjust the starting time for forwarding the received power packet to the other site, thus utilizing storage capacity integrated into the router. The results successfully clarify the feasibility of the power packet distribution network.Index Terms-Power distribution system, power packet, power routing.
The purpose of this study is to demonstrate the energy harvesting of power line magnetic noise. To the best of the authors' knowledge, no research has yet been carried out to confirm this possibility. In this paper, we present a simple circuit design model, and confirm its validity by experimental results. For small self-sufficient devices in a wireless sensor network, the target energy level is 1 mW. We prepare an energy harvesting module with an air-core coil and resonant capacitor. From experimental and simulated results, we investigate the desired conditions for harvesting 1 mW from a uniform magnetic field of 60 Hz. Through experimental results with iron cores, the benefits and drawbacks of the use of a magnetic core are also discussed. With our best harvested module, we successfully demonstrated the energy harvesting of 6.32 mW from a magnetic field of 21.2 μT at 60 Hz. If the usable magnetic flux density increases 10-fold, the harvesting energy increased 100-fold. If the magnetic flux density is at an acceptable level in a public space of 200 μT at 60 Hz, the harvesting power density becomes 130 μW/cm 3 . This value is comparable to the value of an energy harvesting module of a light source during a cloudy day.
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