Takashi Kaneyama

Dual communication system using wired and wireless in home-network

Although many communication ways exist in a home, it waits these existing communication ways for the network which ties all up. It is necessary to have three important performances in this network. They are a low price, construction needlessness, and a high communication performance. In order to realize this, we are advancing examination of the mutual complement network system which works two communication systems simultaneously. That is, they are wireless communi-cation (IEEE 802.15.4 Zigbee) and wired communications PLC (Power Line Communication). This network has been evaluated at the general home or the comparatively small-scale business building. And since the system which raises a communication performance from this time was obtained, it reports.

High Efficiency Isolated AC-DC Converter with Gradationally Controlled Voltage Inverter for On-Board Charger

We have developed a new isolated AC/DC converter for electric vehicle on-board chargers. It consists of an AC/DC converter with Gradationally Controlled Voltage Inverter (GCVI AC/DC converter) and an isolated Zero-Voltage-Switching (ZVS) DC/DC converter, each of which is optimally controlled to convert in a highly efficient means. As a result, the new on-board charger has achieved a power conversion efficiency of over 94%.