Multilevel Inverters Fed PMSM Drive using Carrier Based Space Vector Pulse Width Modulation

G. Sree Lakshmi; S. Kamakshaiah; G. Tulasi Ram Das

G. Sree Lakshmi CVR College of Engineering, Department of EEE, Ibrahimpatan, R.R.District, A.P., India
S. Kamakshaiah JNT University, Department of EEE, Hyderabad, AP, India
G. Tulasi Ram Das Vice Chancellor, JNT University, Kakinada, A.P., India

Abstract

Space Vector Pulse Width Modulation (SVPWM), one of the advanced computation based PWM techniques, has many advantages over conventional carrier-based PWM methodologies. This paper presents a systematic approach and simplified algorithm of space vector pulse width modulation (SVPWM) for a two-level & three level three-phase inverter, which can operate in under modulation and over modulation modes. This method is called as Carrier Based Space Vector Pulse Width Modulation (CBSVPWM) which is based on description of controllable redundant parameters in the modulating signals. The CBSVPWM methods can be described in a unified mathematical formulation, and obtain the same outputs similarly as of corresponding SVPWM. The simulation and analysis of CBSVPWM to the two and three level inverters fed to Permanent Magnet Synchronous Motor drives and their differences and advantages are also presented.