Abstract
This paper presents a low-cost IGBT driver circuit for a three-level neutral point clamped (3L-NPC) converters. The driver circuit is built with IR2110 with an external dead-time circuit based on Schmitt trigger. Originally, the IR2110 is designed to drive two switches of a half-bridge inverter in a complementary manner. Two IR2110 are used to drive one phase of the 3L-NPC converter. Each pulse leading edge is delayed for around ten microseconds to prevent the shoot-through phenomenon. The circuit manipulates the pulses generated from the digital controller is introduced in details. The low and high voltage side of the driver circuit are optically isolated. The proposed circuit design is experimentally tested its applicability for driving 3L-NPC converters is verified.
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