Study and Application of IGBT Switch Circuit with Current-limit Protection

  • 黃 弘宇

Student thesis: Master's Thesis


Abstract This thesis mainly studies on a switch circuit with current limitation When short circuit fault occurs high short circuit current may damage devices and system According to output characteristic of IGBT collector current is proportional to its saturation voltage and can be limited at a safe value while IGBT operating in active region and it is related gate-to-emitter voltage Integrate these characteristics to driver circuit of IGBT a novel protection switch circuit is proposed This protection switch circuit can inhibit fault current by operating IGBT in active region Comparing with the conventional mechanical protection it has a shorter response time and can clear fault before fault current increases to maximum value Eliminating difficulty of arc suppression of short current in a DC system In a AC system there is no delay to shut off the fault current Standard of fault current withstanding for devices will be lower Thus cost can be reduced and reliability can be enhanced In this thesis this short circuit protection switch will be implemented to DC and AC applications One is a digital control inverter and the other is grid-connected solid state circuit breaker These circuits can achieve short circuit protection short circuit current limiting and auto restarting
Date of Award2016 Jul 14
Original languageEnglish
SupervisorJiann-Fuh Chen (Supervisor)

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