Loss Comparison of Electric Vehicle Fuel Cell Integration Methods

This study analyzes and compares the drivetrain losses of two methods of fuel cell integration in electric vehicles. The first is a conventional (boosted) two-stage system while the second is a dual inverter-based solution. Each source of drivetrain losses is described by mathematical equations and the impact of higher order harmonics are determined through circuit model simulation. The dual inverter system achieves an overall energy efficiency improvement of 2.21% and 4.72% for highway and urban drive cycles compared to the conventional method. The use of lower voltage rated power modules in the dual inverter system has significantly reduced the switching losses and improved the driving efficiency.