A generic DC link capacitor sizing methodology for multi-phase wide bandgap based integrated modular motor drives

In this paper, a generic comprehensive analytical design method for dc link capacitors for 3-phase and multiphase drives is proposed, applied on a case study and verified by static and dynamic simulations of the converter. The proposed method is applied on a 15-phase axial flux permanent magnet machine for all possible phase configurations (i.e. 3, 5, 15, (5*3), (3*5)) at sinusoidal and space vector pulse width modulation techniques. For ((5*3), (3*5)) configurations, the interleaving is employed to reduce the capacitor current stress and the design method is applied at the optimal interleaving angle. The results show that the (3,5,15) phase configurations result in the same frequency of the most dominant harmonic current. The most dominant harmonic current resulted is the 2nd harmonic. The 15- phase configuration requires the largest dc link capacitance value, almost the same ripple current stress and the smallest voltage stress. The ((5*3), (3*5)) configurations result in a different most dominant harmonic (i.e. the 5th harmonic at the optimal interleaving angle). The (5*3) configuration results in the smallest capacitance value, voltage and current stress requirements. The SPWM results in smaller dc link current stress and capacitance value compared to the SVPWM technique.

ISBN:9781728174556

Jaar van publicatie:2020

Toegankelijkheid:Closed