The FreedomCAR project will develop a variable timing controlled, high-efficiency, soft-switching inverter for a wide range of input voltages and loads so that the inverter can be operated with an engine coolant temperature of 105ºC. The project is funded by the Department of Energy, and FEEC is the project leader. Azure Dynamics and Powerex are team members, who are responsible for motor control and soft-switching module development, respectively. The Gen-1 soft-switching inverter has been developed and tested with a dynamometer successfully at different coolant temperatures and load conditions. It demonstrates efficiency as high as 99%. A Gen-2 soft-switching inverter is under development for integration improvements, and an in-vehicle test will be conducted.
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