某微网雾化器在不同电源供电下的电磁兼容性分析

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Electromagnetic Compatibility Analysis of a Micro-mesh Atomizer under Different Power Supply

HE Haoxing GAO Zhipeng XUModa ZHANG Wei LIU Yanling* CAO Xiangjun LI Xiaoran （Henan Pharmaceutical and Medical Device Inspection Institute）

Abstract：This micro-meshnebulizer is ClassI，internally powered medical electrical device，which supports power supplythroughanexternal poweradapterand internalbaterycharging.This paper analyzes the impactofpoweradapters on electromagnetic compatibility （EMC） by comparing the EMC performance （EFT and RE tests） under different power adapter models （Type A/B/C ）and internal battery power supply modes.The test results indicate that the internal circuit design，filteringperformance，andcablecoupling efectsoftheadaptersarethekeyfactors leading toexcessive electromagnetic interference.By selecting high-performance power adapters，reducing the length of unshielded cables， and adopting multi-stage fltering design，theEMC performance ofthe productcan be significantly improved，providing an effective solution to the chalenges of volumeconstraints and rectification in portable medical devices.

Keywords： micromesh atomizer; power adapter; electromagnetic compatibility; electrical fast transient pulse group; radiation emission

0 引言

目前市场上有3种雾化器：超声类雾化器压缩类雾化器以及最新流行的微网式雾化器。（剩余4149字）