A Cost Effective Three-Level MOSFET Inverter for Low Power Drives
نویسندگان
چکیده
This paper proposes operating a three-level Neutral Point Clamped (NPC) inverter using a two-level PWM method. This allows for the clamping diodes to be rated at a fraction of the main switches due to their low average current requirement. The use of a charge pump as a low cost method to obtain the isolated gate drive power supplies is extended for use with the NPC topology. Using this control method and circuits, an inverter based on high volume, low-cost low-voltage power MOSFETs is experimentally demonstrated as an economic alternative to an IGBT based drive for 120Vrms-supplied systems.
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تاریخ انتشار 2002