شماره ركورد كنفرانس :
5282
عنوان مقاله :
Investigation of RCD snubber Voltage Balancing Technique for Series-Connected IGBTs In Inverters
پديدآورندگان :
Javidi Pourya javidi.pourya98@gmail.com Electrical Engineering Department Sharif University of Technology, Tehran, Iran , Nouri Hadi hadinoori.jv@gmail.com Electrical Engineering Department Sharif University of Technology, Tehran, Iran , Zarghani Mostafa mostafa.zarghany@gmail.com Electrical Engineering Department Sharif University of Technology, Tehran, Iran , Kaboli Shahriyar kaboli@sharif.edu Electrical Engineering Department Sharif University of Technology, Tehran, Iran
كليدواژه :
Series , Connected IGBTs , High , Voltage Switch , Diode Reverse Recovery , Variable Speed Drives
عنوان كنفرانس :
پانزدهمين كنفرانس بين المللي سيستمها و فناوري هاي الكترونيك قدرت و محركه هاي الكتريكي
چكيده فارسي :
This paper investigates a voltage balancing techniquebased on RCD snubbers for series-connected IGBTs in highpower DC/AC applications. In voltage source inverters, bidirectional current capability is mandatory, and incertain intervals within a switching period, the load currentpasses through the reverse parallel diodes while the higher/lowerarm IGBTs are in their OFF-state. Thus, the voltage acrossseries-connected IGBTs will be determined based on the reverserecovery charge of IGBTs’ anti-parallel diodes. The reverserecovery charge of the diode profiles changes dramatically withits junction temperature. As a result, existing voltage balancingmethods for series-connected IGBTs to equate the voltage acrossseries semiconductor devices are no longer effective due totheir practicality for unidirectional current flow. RCDsnubbers can be effectively used in parallel with each IGBT inseries for inverter applications to balance their voltage in VSIs.The proposed scheme is simulated for a case study using PSPICEsoftware.
