Open AccessInterleaving‐based converter system with features of external auxiliary triggering and universal line input for driving medical laser equipment
Author(s) -
Shen ChihLung,
Chen LiZhong,
Shen YouSheng
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.5268
Subject(s) - interleaving , line (geometry) , computer science , voltage , controller (irrigation) , capacitor , electrical engineering , waveform , power (physics) , engineering , physics , agronomy , geometry , mathematics , quantum mechanics , biology , operating system
A novel power converter system to drive medical laser equipment is proposed here, which has the major features of interleaving, external auxiliary triggering, and lighting period control. The converter system can deal with universal line input and provide instantaneous high power for medical laser equipment. This system mainly includes an interleaved‐boost front end (IBFE), a lighting‐period control unit (LPCU), an energy‐stored capacitor bank (ESCB), an igniting and arc‐sustaining circuit (IASC), external auxiliary triggering circuit (EATC), and a system controller (SC). With them, it is able to fulfil power factor correction (PFC), lower input current ripple, deal with universal line voltage, provide a larger current to xenon lamp, ignite xenon lamp at a lower voltage, and sustain lamp arc. The sustained arc will be beneficial to light the xenon lamp again. As a result, much more precise timing of laser output control can be accomplished. The operation of the converter system is discussed. In addition, a 2‐kW prototype to deal with the line voltage range of 90 to 265 V ac is built and examined. Key waveforms and practical measurements have demonstrated the feasibility of the proposed converter system.