Direct cooling of propulsion drives for high power density and low volume

This Second Annual Report summarizes the activities performed on this grant from July 1, 2002, through June 30, 2003. The main technical activities during this time period were the following: (1) Understanding of direct cooling methods for power semiconductors; (2) Thermal simulation of spray-cooled power modules (3) Design of a spray-cool test bed for power modules; (4) Design of experiments for thermal test die; (5 Analysis of selected inverter topologies for high- power motor drives for ship propulsion; and (6) In-depth analysis of a simple method for series connection of IGBTs.