인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
A modular multilevel converter (MMC) consists of a large number of submodules, each containing an embedded controller whose firmware needs to be updated as needed. Conventional wired programming methods, such as JTAG-based individual programming, become increasingly inefficient as the number of submodules grows, resulting in increased maintenance time and wiring complexity. In large-scale MMC systems, individually connecting each submodule controller via wired interfaces not only prolongs the update procedure but also increases the risk of human error during maintenance. This paper proposes a Wi-Fi-based wireless firmware download system for MMC submodule controllers based on a dual-core DSP(Digital Signal Processor). The proposed system adopts a hierarchical communication structure consisting of a host PC, a fixed wireless access point (AP) installed inside the converter panel, Wi-Fi modules, and DSP controllers. Firmware images are transmitted wirelessly via TCP/IP, and a group-based sequential download method is applied to distribute network load and ensure communication stability under large-scale deployment. A custom bootloader and flash kernel are implemented on the DSP to perform reliable flash erasing, programming, and verification with checksum-based integrity checking at each stage. The system supports independent firmware download for dual-core CPU1 and CPU2, and provides real-time status monitoring including connection state, firmware version, and download progress through a graphical HMI(Human-Machine Interface). Experimental results confirm that the proposed system enables reliable and efficient wireless firmware updates, significantly reducing maintenance procedures compared to conventional wired methods.
본문·목차
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