[Electronics]Thermal control design of solar inverter system

Objectives

  • System-level computational heat transfer analysis of solar inverter
  • Prediction of temperature changes in MOSFET, DIODE, and IGBT devices according to changes in cooling conditions
  • Design verification of active cooling system

System Configuration

  • PCB : Dielectric, Conductor
  • MOSFET
  • Diode
  • DC-DC converter
  • SMPS
  • IGBT
  • Power control unit
System confuguration

Heat Transfer Modeling

  • Two-Resistor modeling for junction temperature calculation : MOSFET, Diode, IGBT
Two-resistor modeling

CFD Modeling

  • Control volume and grid modeling for heat transfer analysis
Control volume and grid modeling

Cooling Fan Modeling

  • Dimension : 80-80-29 mm
  • Max. flow rate : 90 cfm
  • Max. pressure : 270 Pa
  • Rotational speed : 8,600 rpm
Fan performance curve

CFD Results

  • Design verification of heat sink effect to improve cooling effect
Temperature under natural convection
  • Design verification of cooling fan effect to improve cooling effect
Temperature under forced convection