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FreedomCAR

Research is funded by the Department of Energy
The FreedomCAR project is to 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 engine coolant temperature of 105ºC. The project is funded by 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. Gen-1 soft-switching inverter has been developed and tested with dynamometer successfully at different coolant temperatures and load conditions. It demonstrates efficiency as high as 99%. Gen-2 soft-switching inverter is under development for integration improvement, and in-vehicle test will be conducted.
Specifications:

Battery Voltage: 200V - 450Vdc
Peak Power: 55kW
Peak Torque: 240Nm
Continuous Power: 30kW
Coolant Temperature: 105ºC
Inverter Efficiency: 98.5% - 99%

System Block Diagram


Inverter-Motor-Dynamometer Test System Setup


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