پديد آورنده :
عظيمي، سارا
عنوان :
شناسايي خطا در مبدل ماتريسي توسط سيگنال ترارسانايي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
دوازده،69ص.: مصور،جدول،نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
توصيفگر ها :
ترانزيستور IGBT , شناسايي خطاي مدار باز و اتصال كوتاه
تاريخ نمايه سازي :
16/1/93
دانشكده :
مهندسي برق و كامپيوتر
چكيده فارسي :
به فارسي وانگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract Matrix converters are arrays of controllable semiconductor bidirectional switches which connect input phases to arbitrary output phases These converters received much attention because of their diverse advantages and became very promising candidates to replace the conventional two stage ac dc ac converter These advantages include resolving the need for bulky dc link capacitors which cause longer lifetime and operating in high temperature environment high quality input power factor bidirectional current flow These attractive features of Matrix Converter MC made it useful in many applications including aerospace military and etc Although its modulation techniques and commutation issues have been thoroughly investigated system reliability remains an open issue and was investigated individually The most common reliability problem is that a bidirectional switch has an open switch or short switch fault during the operation In his thesis the detection of open circuit and short circuit faults in these switches were investigated In this thesis a matrix converter driving an adjustable speed permanent magnet synchronous motor is examined A new method for detecting open circuit and short circuit faults in IGBTs of MC was suggested In the proposed algorithm fault detection was designed based on the trans conductance value of the IGBT By monitoring the output current input and output voltages of the matrix converter the IGBT trans signal is defined to indicate the deviation of the trans conductance from nominal value The fault signal is then compared to a threshold which has been calculated to guarantee a predefined rate of conductance deviates from the nominal value and the fault signal exceeds the threshold which indicates an error in the system Key words Matric Converter IGBT Transistor Trans conductance detection of open circuit and short circuit fault
