Output current ripple minimization of nine-phase PWM inverters
Muqorobin A.a,b, Purwadi A.a, Dahono P.A.a
a Electrical Energy Conversion Laboratory, Institute of Technology Bandung, Indonesia
b Research Center for Electrical Power and Mechatronics, Indonesian Institute of Sciences, Bandung, Indonesia
Abstract
© 2016 IEEE.A multiple three-phase machine can be symmetrical or asymmetrical, depending on the phase displacement between the three-phase stator winding sets. This paper investigates the optimal phase displacement to minimize the output current ripple of nine-phase PWM inverters. The output current can be separated into current components that produce air gap flux and current components that produce copper losses in the stator. Based on the analytical calculation, the optimal phase displacement that produce minimum current ripple for air gap flux production is 40°. This result is supported by experimental results.
Author keywords
Analytical calculation,Current component,Current ripples,multiphase,Phase displacement,PWM inverter,Three phase stator,Three-phase machines
Indexed keywords
current ripple,multiphase,PWM inverters