Intelligent cooling system for three level inverter

Three level inverter system produce voltage which consists of three different possible values. Inverter can be used to interface renewable energy sources with the grid. Temperature has significant effect on performance of power MOSFETs. Typically, MOSFET is used as power switch in such applications as it produce heat during operation, and the heat energy dissipated by these components must be carefully controlled if operating temperatures are to be maintained. So for the system to work efficiently, an intelligent cooling of MOSFET is required. This paper proposes an intelligent cooling for three level H-bridge inverter. The system consists of MOSFETs, LM 35 temperature sensor, Opto-couplers. Arduino is used to give trigger pulses to MOSFETs and control the on-off operation of fan. When temperature goes above the predefined level, fan turns on to cool the MOSFETs.