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LLC 공진형 컨버터를 사용한 다용도 Nd:YAG 레이저 전원장치 설계
정도(Tao Zheng),김희제(Hee-Je Kim),이재철(Jae-cheol Lee),허국성(Guo-Cheng Xu) 대한전기학회 2015 전기학회논문지 Vol.64 No.6
LLC resonant converter has been widely used because of its high efficiency and high energy density. In this paper, we designed a LLC resonant converter as the main power supply of the Nd:YAG pulse laser. First harmonic approximation (FHA) is used to model the LLC resonant converter. FHA equivalent circuit model and the transfer function of the LLC resonant converter is proposed. Soft start technology is also used to suppress the surge current. The laser output simulation test result is identical with the practical test, the laser energy of every pulse can reach up to 2.5J, and the pulse per second (PPS) can be adjusted from 6 to 18. The power system is verified stable and reliable by both of the simulation and experiment results.
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슈퍼 커패시터 및 태양전지를 이용한 로봇청소기용 양방향 충전시스템 설계
정도(Tao Zheng),박성욱(Sheng-Xu Piao),권대환(Dae-Hwan Kwon),구위경(Wei-Jing Qiu),김희제(Hee-Je Kim) 대한전기학회 2016 전기학회논문지 Vol.65 No.1
In this paper, a bidirectional power supply charger is proposed. This system used a solar cell panel to generate electricity and used super capacitors to store these energies, which can be used for the robot cleaner or some other electronic products. This system include a phase-shift controlled bidirectional dual active bridge (DAB) converter, solar panel super capacitors and DSP controller. In the daytime it can charge to the super capacitors to store the energy generated by the solar cell panel and in the night it will release the energy stored in the super capacitors to loads. A prototype of the proposed bidirectional power supply charger system was designed which can achieve 18V to 30V input, 10V/20W output to super capacitors and 9V/6.5W output when it acts as a charger for the robot cleaner. The system is verified to be sTable and reliable by both the simulation and experimental results.
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피크전류모드 제어를 적용한 고주파 심부발열 전원장치 설계
허국성,정도,박성욱,구위경,김희제,Xu, Guo-Cheng,Zheng, Tao,Piao, Sheng-Xu,Qiu, Wei-Jing,Kim, Hee-Je 대한전기학회 2017 전기학회논문지 Vol.66 No.1
In this paper a prototype of high frequency heating power supply system based on the high frequency heating principle is designed to take the place of acupuncture, moxibustion, warm dressing treatment and some other traditional physical therapy methods. Which possess the advantages of low cost, convenient, easy operation and good effect. The high frequency heating power supply can generate a pulse voltage of more than 1KV with 300KHz switching frequency to heat the patient's skin. The skin temperature can reach to $41{\sim}42^{\circ}C$. The peak current control method is used to maintain the skin temperature in the designed range. The design of the main circuit is based on the flyback converter topology. An easier and practical design method is proposed in this paper. The power supply system prototype is verified to be stable and reliable by both the simulation and experimental results.
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피크전류모드 제어를 적용한 고주파 심부발열 전원장치 설계
허국성(Guo-Cheng Xu),정도(Tao Zheng),박성욱(Sheng-Xu Piao),구위경(Wei-Jing Qiu),김희제(Hee-Je Kim) 대한전기학회 2017 전기학회논문지 Vol.66 No.2
In this paper a prototype of high frequency heating power supply system based on the high frequency heating principle is designed to take the place of acupuncture, moxibustion, warm dressing treatment and some other traditional physical therapy methods. Which possess the advantages of low cost, convenient, easy operation and good effect. The high frequency heating power supply can generate a pulse voltage of more than 1KV with 300KHz switching frequency to heat the patient’s skin. The skin temperature can reach to 41~42℃. The peak current control method is used to maintain the skin temperature in the designed range. The design of the main circuit is based on the flyback converter topology. An easier and practical design method is proposed in this paper. The power supply system prototype is verified to be stable and reliable by both the simulation and experimental results.
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다중 공진형 컨버터를 이용한 이중 캐비티 구조의 4Hz 의료용 루비레이저 시스템 개발
이재철(Jae-cheol Lee),정도(Tao Zheng),박성욱(Piao Shengxu),허국성(Guo-Cheng Xu),김희제(Hee-Je Kim) 대한전기학회 2015 전기학회논문지 Vol.64 No.8
Various laser systems have been widely used in almost all industrial technologies because they have high energy density, directivity and coherence. Recently the clinical application is becoming wider in medical parts such as incurable disease, diagnosis and so on. Generally, ruby laser beam has the greatest efficacy for removing tattoos, freckle and other skin problem. But current medical ruby laser system has the maximum repetition rate of 2Hz and optical output beam energy of 1J. Many medical doctors really want to have a high repetition ruby laser system because that can reduce the operation time. We investigated a new ruby laser system with high repetition rate of 4Hz using double cavities. Furthermore, we develop a new power supply system adopting zero voltage switching(ZVS) to minimize switching loss by LLC resonant converter designed as 2kW class.
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만설분,양의,최검,정도,마려,Wan, Xue-Fen,Yang, Yi,Cui, Jian,Zheng, Tao,Ma, Li The Institute of Electronics and Information Engin 2012 전자공학회논문지 Vol.49 No.12
본 논문에서는 중국 현지 염색 기업의 열 센서망에 적용 가능한 원격 가상 현실 제어 플랫폼에서 실행할 수 있는 데이터베이스 액세스를 가상 현실 모델링 언어 (VRML)를 소개하였다. 또한, 3차원 실시간 자료 시각화를 위한 가상 현실 모델링 언어-액티브엑스 서버 페이지(VRML-ASP)를 소개하였다. 나아가 이와 관련된 스크립트도 다루었을 뿐만 아니라, 열 센서 노드와 센서 영역에서의 움직임을 분석하였다. 이 데이터베이스 프레임워크는 마이크로칩에서 발표한 마이와이$^{TM}$($MiWi^{TM}$)의 표준에 최적화되었다. 이러한 분석 결과를 근거로, 시스템 구성에 따라 가상 현실 모델링 언어-액티브엑스 서버 페이지(VRML-ASP) 데이터 액세스 프레임워크가 가상 현실 원격 산업 공정 제어 시스템을 위한 하나의 경쟁력 있는 데이터 관리 해결책이 될 수 있음을 확인할 수 있었다. A Virtual Reality Modeling Language (VRML) database access in remote virtual reality control platform for dyeing enterprise $MiWi^{TM}$ thermal sensor network is presented in this paper. The VRML-ASP framework is introduced for 3D real-time data plotting in this application. The activities of thermal sensor nodes and sensor area are analyzed. The database access framework is optimized for $MiWi^{TM}$ wireless sensor networks. The experimental results show that VRML-ASP database access framework could be a reliable and competitive data-manage candidate for targeted virtual reality remote industrial visualization application.
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Xue-fen Wan(만설분),Yi Yang(양의),Jian Cui(최검),Tao Zheng(정도),Li Ma(마려) 대한전자공학회 2012 전자공학회논문지 Vol.49 No.12
본 논문에서는 중국 현지 염색 기업의 열 센서망에 적용 가능한 원격 가상 현실 제어 플랫폼에서 실행할 수 있는 데이터베이스 액세스를 가상 현실 모델링 언어 (VRML)를 소개하였다. 또한, 3차원 실시간 자료 시각화를 위한 가상 현실 모델링 언어-액티브엑스 서버 페이지(VRML-ASP)를 소개하였다. 나아가 이와 관련된 스크립트도 다루었을 뿐만 아니라, 열 센서 노드와 센서 영역에서의 움직임을 분석하였다. 이 데이터베이스 프레임워크는 마이크로칩에서 발표한 마이와이<SUP>TM</SUP>(MiWi<SUP>TM</SUP>)의 표준에 최적화되었다. 이러한 분석 결과를 근거로, 시스템 구성에 따라 가상 현실 모델링 언어-액티브엑스 서버 페이지(VRML-ASP) 데이터 액세스 프레임워크가 가상 현실 원격 산업 공정 제어 시스템을 위한 하나의 경쟁력 있는 데이터 관리 해결책이 될 수 있음을 확인할 수 있었다. A Virtual Reality Modeling Language (VRML) database access in remote virtual reality control platform for dyeing enterprise MiWi<SUP>TM</SUP> thermal sensor network is presented in this paper. The VRML-ASP framework is introduced for 3D real-time data plotting in this application. The activities of thermal sensor nodes and sensor area are analyzed. The database access framework is optimized for MiWi<SUP>TM</SUP> wireless sensor networks. The experimental results show that VRML-ASP database access framework could be a reliable and competitive data-manage candidate for targeted virtual reality remote industrial visualization application.
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