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차량 탑재형 배터리 충전기의 인터리브드 부스트 PFC 컨버터 제어시스템 설계 및 구현
이준혁(Jun Hyok Lee),정광순(Kwang-Soon Jung),이경중(Kyung-Jung Lee),정재엽(Jae Yeop Jung),김호경(Ho Kyung Kim),홍성수(Sung-Soo Hong),안현식(Hyun-Sik Ahn) 대한전기학회 2016 전기학회논문지 Vol.65 No.5
In this paper, we propose a digital controller design process for the interleaved type of a boost PFC (Power Factor Correction) converter which can disperse the heat of the switching devices due to the interleaved topology. We establish a mathematical model of a boost PFC converter and propose a controller design method based on the root locus. The performance of the designed controller is verified by simulations. The measurement of the input voltage, inductor currents, and the converter output link voltage are needed for the control of the converter system which consists of a power unit and a control unit where a high-performance 32-bit microcontroller is used. The adjustment of A/D conversion timing is also needed to avoid high frequency noise generated when the switches on/off. It is illustrated by the real experiments that the designed control system with the properly adjusted ADC timing satisfies the given performance specifications of the interleaved boost PFC converter in the on-board slow battery charger.
ISO 26262에 부합한 능동형 안전벨트 제어 시스템의 하드웨어 아키텍처 설계 및 검증
이준혁(Jun Hyok Lee),곽현철(Hyun Chul Koag),이경중(Kyung-Jung Lee),안현식(Hyun-Sik Ahn) 대한전기학회 2016 전기학회논문지 Vol.65 No.12
This paper presents a hardware development procedure of the ASB(Active Seat Belt) control system to comply with ISO 26262. The ASIL(Automotive Safety Integrity Level) of an ASB system is determined through the HARA(Hazard Analysis and Risk Assessment) and the safety mechanism is applied to meet the reqired ASIL. The hardware architecture of the controller consists of a microcontroller, H-bridge circuits, passive components, and current sensors which are used for the input comparison. The required ASIL for the control systems is shown to be satisfied with the safety mechanism by calculation of the SPFM(Single Point Fault Metric) and the LFM(Latent Fault Metric) for the design circuits.
전기자동차 탑재형 배터리 완속 충전기의 위상천이 풀-브릿지 컨버터 제어시스템 설계 및 구현
이준혁(Jun Hyok Lee),정광순(Kwang-Soon Jung),김호경(Ho Kyung Kim),홍성수(Sung-Soo Hong),안현식(Hyun-Sik Ahn) 대한전기학회 2016 전기학회논문지 Vol.65 No.11
In this paper, first, a linearized modeling of a phase shift full-bridge converter used in chargers of electric vehicles is derived by using state-space approach and transfer functions from the duty ratio to output voltage and the inductor current are also verified. second, control systems for the output voltage and the inductor current are designed using the root locus technique. It is illustrated by experimental results that the control performance on the output variables is satisfied with the designed digital control system based on a automobile qualified 32-bit microcontroller.