Sensorless speed control of six phase synchronous machine using back emf observer in MATLAB

Introduction

MATLABSolutions demonstrate In this particular task, step-by-step guide This simulation discusses the control and identification of multiphase motor flux, specifically applied to electric ship propulsion. It focuses on a vector control strategy called Field Oriented Control (FOC), which employs Four-Vector 24-Sector Modulation (FV24SM) based on the Vector Space Decomposition (VSD) method. This approach aims to orient flux components for a Dual Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM) ship, powered by two identical and independently operated Voltage Source Inverters (VSIs), each connected to its own DC source.

The dynamic model and control of the motor are performed in three orthogonal two-dimensional subspaces. The core objective of this strategy is to minimize extra stator harmonic current components in the (z1, z2) subspace, which is the harmonic-component subspace responsible for generating losses. The paper outlines the principles for selecting the reference voltage vector and the method for calculating time intervals. The effectiveness and validity of this proposed strategy are demonstrated through simulation results.