A novel approach to calculate the loss of inverter power device and design of water-cooled radiator

This paper puts forward an analytic method to calculate the power device loss of VFD (variable-frequency drive) and the temperature rise of water-cooled radiator. Detailed analysis and design for the loss of power devices, the temperature rise at inlets and outlets of water-cooled radiator, the temperature rise of convection heat transfer of cooling, the temperature rise of heat conduction of water cooling plate, power device internal thermal resistance and the highest temperature system are made. This paper designs a water-cooled radiator based on theoretical analysis, the evaluation for water-cooled radiator thermal performance is made and the simulation results validate the validity of the proposed scheme.