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Development of a Driver for BLDC Motors Using Smart Communication Platform
Injae Lee(이인재),Barun Basnet(바스넷 버룬),Junho Bang(방준호) 대한전기학회 2016 전기학회논문지 Vol.65 No.5
This paper presents the design of a BLDC motor driver applicable to various valve control systems using smart devices. BLDC motors are relatively small in size and have better performance than other motors. They help in reducing maintenance cost, installation costs and power consumption in plant facilities. The proposed driver is specially designed for BLDC motors using Smart Communication Platform. It adds smart features in the valve control system using BLDC motors such as multi-management, control, networking and monitoring in real time with the help of smart devices.
Design of an Active Inductor using a Current Differencing Transconductance Amplifier
Junho Bang(방준호),Basnet Barun(바스넷 버룬),Junghoon Kim(김정훈),Hoyoung Kim(김호영),Ildae Oh(오일대) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
In order to utilize the Current Differential Transconductance Amplifier (CDTA), which is actively studied nowadays, this study used active filters instead of passive filters. Especially, the 3 CDTAs were used for floating inductors which compose the passive filters, and designed active filters with 2 CDTAs for grounding inductors. After that, the characteristics were verified through simulation
Development of a Sensorless Deep Well Pump Multi-function Controller using Current Detection Method
In-Jae Lee(이인재),Barun Basnet(바스넷 버룬),Hyun-Jun Chun(천현준),Jun-Ho Bang(방준호) 대한전기학회 2017 전기학회논문지 Vol.66 No.7
In this paper, we propose a sensorless multi-function controller applicable for deep well water pumps using current detection method. The proposed system overcomes various drawbacks of existing sensored system and additional features like Over current protection function due to overload, Under current protection function for idling at low water level and Relay function for starting single phase motors and acts as a level indicator to detect water lever in real time by the current detection method. A prototype of the multi-function controller system is designed and all of its functions are tested in the laboratory. The application of the proposed controller ensures reduction in the power consumption and maintenance cost in the facilities like water and septic tanks, drainage and waste water system, oil and chemical tanks where deep well pumps are used.