Convenient thermal modeling for loss distribution of 3-level Active NPC using newton's law

Abstract

In this paper, a new thermal modeling method is proposed for loss control method of 3-level Active NPC inverter. In the drawback of conventional 3-level NPC, the generated thermal in each switch is unbalanced. And utilization of designed system has decreased. In order to compensate, 3-level Active NPC inverter can distribute switch loss in accordance with operation of active switch. Therefore thermal modeling is required for thermal calculation. This paper is simple proposed new thermal modeling method based on newton's law of cooling than conventional thermal modeling method. Thought loss of active NPC is controlled. Proposed thermal modeling is verified by simulation.