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Jinsoo Han,Chang-Sic Choi,Ilwoo Lee IEEE 2011 IEEE transactions on consumer electronics Vol.57 No.1
<P>This paper describes more efficient home energy management system to reduce power consumption in home area. We consider the room easily controllable with an IR remote control of a home device. The room has automatic standby power cut-off outlets, a light, and a ZigBee hub. The ZigBee hub has an IR code learning function and educates the IR remote control signal of a home device connected to the power outlet. Then the power outlets and the light in the room can be controlled with an IR remote control. A typical automatic standby power cut-off outlet has a waiting time before cutting off the electric power. It consumes standby power during that time. To eliminate the waiting time, we turn off the home device and the power outlet simultaneously with an IR remote control through the ZigBee hub. This method actively reduces the standby power. The proposed HEMS provides easy way to add, delete, and move home devices to other power outlets. When a home device is moved to the different outlet, the energy information of the home device is kept consistently and seamlessly regardless of location change. The proposed architecture gives more efficient energy-saving HEMS.</P>
Network Protocol based Power Management Architecture and Method in Always-On Home-Network devices
Chang-Sic Choi,Wan-Ki Park,Kwang-Roh Park 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Aggregated power consumption of homenetwork devices such as home-gateway, home-server, settop box is rapidly increased because these devices are operated in powered-on state to support anyone, anywhere, anytime services. But power utilization of these devices is very low because there is much idle time under powered-on state. To reduce the overall power consumption in homenetwork, we are developing power-controlled homegateway which could be changed to standby-state when there are no actvie services and traffics. In this papare, we propose network-protocol based power management method and its architecture for our developing home-gateway. Proposed method maintains network informtion database at normal state, and set home-gateway into standby-state without loss of network connections or working contexts. Thus our proposed method and developing home-gateway can save power consumption dramatically in always-on home-network environments.
Choi, Jae-Hoon,Yang, Hyung-Lyeol,Ahn, Hyun-Sik,Jang, Gye-Yong,Lee, Dong-Keun,Kim, Kuk-Hee,Hahn, Sang-Hee,Kim, Chang-Hwan,Hong, Jae-Sic,Chu, Yong,Kong, Jong-Dae,Hong, Seong-Lok,Hwang, In-Sung Korean Nuclear Society 2008 Nuclear Engineering and Technology Vol.40 No.6
The KSTAR Magnet Power Supply (MPS) was dedicated to the SC coil commissioning and $1^{st}$ plasma experiment as a part of the system commissioning. Although many efforts to develop large-current power supplies that are useful for high power electronic devices have been made in various application fields, such as for large metal-plating devices, there were clear discrepancies between conventional power supply technologies and that for the SC coils due to the special SC coil load conditions. Therefore, most of the power supply technologies for the SC coils were a challenge in the domestic research area due to their limited application. However, the MPS commissioning result showed that all of the hardware and controlling software operated well, and this result finally led to the success of SC coil commissioning and the KSTAR $1^{st}$ plasma experiment. This paper will describe key features of KSTAR MPS for the $1^{st}$ plasma experiment, and will also report the commissioning results of the magnet power supplies.
OVERVIEW OF SUPERCONDUCTING MAGNET POWER SUPPLY SYSTEM FOR THE KSTAR 1ST PLASMA EXPERIMENT
JAE HOON CHOI,HYUNG LYEOL YANG,HYUN SIK AHN,GYEYONG JANG,DONG KEUN LEE,KUK HEE KIM,SANG HEE HAHN,CHANG HWAN KIM,JAE SIC HONG,YONG CHU,JONG DAE KONG,SEONG LOK HONG,IN SUNG HWANG,MIN SEONG YUN,DAE KYUNG 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.6
The KSTAR Magnet Power Supply (MPS) was dedicated to the SC coil commissioning and 1st plasma experiment as a part of the system commissioning. Although many efforts to develop large-current power supplies that are useful for high power electronic devices have been made in various application fields, such as for large metal-plating devices, there were clear discrepancies between conventional power supply technologies and that for the SC coils due to the special SC coil load conditions. Therefore, most of the power supply technologies for the SC coils were a challenge in the domestic research area due to their limited application. However, the MPS commissioning result showed that all of the hardware and controlling software operated well, and this result finally led to the success of SC coil commissioning and the KSTAR 1st plasma experiment. This paper will describe key features of KSTAR MPS for the 1st plasma experiment, and will also report the commissioning results of the magnet power supplies.