Analysis of Variable Frequency Drive for Electric Vehicles
DOI:
https://doi.org/10.69955/ajoeee.2026.v6i1.87Keywords:
Conduction topologies, , electric vehicle, variable frequency driveAbstract
Efficient power electronics are critical in electric vehicle powertrains to optimize motor controls. Traditional traction topologies suffer from high switching losses and design complexities due to intermediate DC-DC boost stages. This paper evaluates the operational boundaries of a three-phase Variable Frequency Drive. Developed within the PSpice, the simulation maps the structural trade-offs between 180° and 120° conduction topologies under variable resistance-inductance load lines. Results show that while the 180° mode maintains line voltage stability across all loads, it poses a severe risk of phase-leg shoot-through short circuits during switching intervals. Conversely, the 120° mode prevents shoot-through by providing an inherent 60° non-conducting safety window. The parametric sweeps show that under a heavy inductive load line, the 120° voltage waveform collapses into an asymmetric triangular profile. Furthermore, transient testing indicates that open-loop Piecewise Linear modulations result in severe gate-pulse overlap. These findings establish critical boundary constraints vital for deploying secure vehicle inverter drive control loops.Downloads
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