Schematic diagram and data summary of the simulation results of the air-cooled heat dissipation scheme of the photovoltaic inverter:
(1) The plan adopts all-aluminum shovel heat sink + NMB6025ML 7800RPM fan, the shape of the heat sink remains unchanged, the thickness of the bottom plate is unchanged, the thickness of the spur is 0.8mm, a total of 73fins, the spacing: 2.3mm, the shovel aluminum heat sink.
(2) Special attention: there is no gap between the adjustment fan and the front panel to prevent the air from returning. (If there is a 5mm gap according to the original design, the air will flow back and the temperature will increase by 6°C.)
(3) Simulation result: The IGBT case temperature is 94.2℃, which meets the customer's requirement of 100℃.