Power loss study of inverter-fed machine drives using Discontinuous Pulse Width Modulation

This paper presents a power loss study of a machine drive system using discontinuous pulse width modulation (DPWM) excitation. Pspice modeling has been used in the inverter loss prediction, and for the machine loss analysis, finite element analysis (FEA) is employed. All the analytical research of the machine drive system power loss has been verified by calorimetric measurements. This paper provides an overall comparative study of the power loss using DPWM and conventional sinusoidal pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM) excitation. A conclusion has been drawn that DPWM is superior to SPWM and SVPWM considering power loss for small-scale drive applications.