Indirect Field Oriented Control Based Five Phase NPC Multilevel Inverter for Reducing Torque Pulsation in PMBLDC Drive

Abstract

This paper presents a three level based five phase Neutral Point Clamped (NPC) inverter fed Permanent Magnet Brushless DC drive application. The performances of motor are enhanced depend upon mathematical model. Thus, the parameter variation such as noise, flux variation, common mode voltage and harmonic level of the motor or inverter. The voltage saturation is one of the major problems of a motor due to the more current fluctuations and speed oscillations. This issue can be resolved by using PWM technique based on the reference motor torque and flux. In this paper indirect field oriented control (IFOC) based NPC inverter is used to minimize the torque ripple and also reduce the voltage saturation. Generally, the three level neutral point clamped inverter is used for medium and high level applications. Compared with conventional two level type of inverter, this type of NPC inverters have more advantages. It is used to generate the greater number of levels output waveform in lower harmonic content at the same switching frequency and less voltage stress throughout the semiconductor switches. At last the motor performance and control schemes are analyzed and verified by using Matlab/Simulink software environment.