[논문]Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network

Ko, Junho; Park, Chul-Won; Kim, Yoon Sang

doi:10.5370/jeet.2015.10.3.1221

Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network 원문보기

Journal of electrical engineering & technology, v.10 no.3, 2015년, pp.1221 - 1226

Ko, Junho (Dept. of Computer Science and Engineering, Korea University of Technology and Education) , Park, Chul-Won (Dept. of Electrical Engineering, Gangneung-Wonju National University) , Kim, Yoon Sang (School of Computer Science and Engineering, Korea University of Technology and Education)

Abstract ▼ AI-Helper

This paper proposes a multiple switch mode power supply (SMPS) system based on the wireless network which controls variable load. The system enables power supply of up to 600W using 200W SMPS as a unit module and provides a controlling function of output power based on variable load and a monitoring function based on wireless network. The controlling function for output power measures the variation of output power and facilitates efficient power supply by controlling output power based on the measured variation value. The monitoring function guarantees a stable power supply by observing the multiple SMPS system in real time via wireless network. The performance of the proposed system was examined by various experiments. In addition, it was verified through standardized test of Korea Testing Certification. The results were given and discussed.

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제안 방법

The remote control part of the proposed system is combined with a number of multiple SMPSs. But, the experiment was performed using a set of multiple SMPS for simplicity: the experiment was conducted in the test environment where LED for load, three single SMPSs, PFC for power regulation, interface board for control and communication, server for communi- cation and data saving, and tablet (Android platform) for remote control were set up as shown in Fig. 10.
The level of performance (efficiency and power factor) of the single SMPS was low under the load less than 100% (50%, 20%, 10%), which highlighted the importance of the system’s output power control based on variable load. From the measurement test results for output power under the load (variation of dimming duty in LED), it was confirmed that the proposed system could enable controlling the output power proportional to the variable load, which efficiency was objectively assessed by the national standardized test.
The major function of the application divides into the multiple SMPS monitoring and SMPS control. In order to simulate such functions, authors established wireless network environment composed of 2 SMPS, through which voltage, current, and temperature, and control status of the multiple SMPS were monitored.
The proposed system allowed an efficient power supply up to 600W by integrating 200W unit-module-type SMPS (called single SMPS), our previous work, and stable power supply by providing output power control based on variable load and wireless network-based monitoring. The efficiency with respect to various output loads was examined and the performance was also reviewed by the measurement test for output power, and finally received the official certification by Korea Testing Certification.

대상 데이터

The experiment was conducted under the conditions of 600.52W of loaded output power, 21-25℃ Ta (ambient temperature) and 20-40% RH (relative humidity). Each category was measured after preheating each module with electric power loader for ten minutes under full load condition.

이론/모형

The standardized test was conducted under the supervision of Korea Testing Certification for objective verification. The experiment was conducted under the conditions of 600.

성능/효과

11 represents output power according to load, the blue line standing for 200W power (one single SMPS is used), the green line of 400W power (two single SMPSs are used), and the orange one of 600W power (three single SMPSs are used), respectively. The experimental result confirmed that output power could be efficiently controlled by providing the power (200W, 400W, 600W) which is proper to the variable load conditions (variation of LED’s dimming duty).
98). The level of performance (efficiency and power factor) of the single SMPS was low under the load less than 100% (50%, 20%, 10%), which highlighted the importance of the system’s output power control based on variable load. From the measurement test results for output power under the load (variation of dimming duty in LED), it was confirmed that the proposed system could enable controlling the output power proportional to the variable load, which efficiency was objectively assessed by the national standardized test.
The test result (90.3% efficiency and 99.76% power factor under full load) obtained from the standardized test objectively and officially certified the performance of the proposed system, and also confirmed that output power matching the load could be supplied in an efficient way using the proposed multiple SMPS system.
The test results (mean efficiency (90%) and mean power factor (0.98) of the unit module in case of full (100%) output load) confirmed that the efficiency was good only in 100%, and that it was greatly affected by the variation of input voltage and output load. Those results reassure the importance of the system’s function to control output power according to the variable load.
The efficiency with respect to various output loads was examined and the performance was also reviewed by the measurement test for output power, and finally received the official certification by Korea Testing Certification. The test results obtained from both the input voltage and output load variation verified that the performance of the single SMPS under 100% output load was excellent (mean efficiency was 90%, and mean power factor was 0.98). The level of performance (efficiency and power factor) of the single SMPS was low under the load less than 100% (50%, 20%, 10%), which highlighted the importance of the system’s output power control based on variable load.

참고문헌 (12)

F. Kurokawa, and H. Matsuo, “A new Multiple- Output Hybrid Power Supply,” IEEE Transactions on Power Electronics, vol.3, no.4, pp.412-419, 1988.

상세보기
Seung-Min Shin, Junh-Hoon Ahn and Byoung-Kuk Lee, “Maximum Efficiency Operation of Three-Level T-type Inverter for Low-Voltage and Low-Power Home Appliances,” Journal of Electrical Engineering & Technology, Vol. 10, No. 2, pp. 586-594, 2015.

원문보기 상세보기
B. S. Mohammed, R. Iibrahim, N. Perumal and K. S. Rama Rao, “Power Flow Control of a Multi-bus/ Three-feeder Distribution System Using Generalized Unified Power Quality Conditioner,” Journal of Electrical Engineering & Technology, Vol. 10. No. 1, pp. 8-17, 2015.

원문보기 상세보기
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Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network 원문보기

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Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network 원문보기

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