Six Phase Induction Machine Simulation in Matlab

Six Phase Induction Machine Simulation in Matlab

This video demonstrate how to simulate six phase induction motor in MATLAB. The six phase induction motor have great advantages over three phase induction motors like Improved reliability, increased fault tolerance, Greater efficiency, Lower per phase power handling requirements, Higher torque density, reduced torque pulsation, Improved noise characteristics. The current effect to magnetomotive force of six phase motors is the best of all multiphase motors. The applicability of multiphase system is explored in electric ship propulsion, locomotive traction, industrial high power applications, electric and hybrid electric vehicles, electric aircrafts, high power compressors, extruder pumps, alternators etc.

The simulation model allows us to perform various operation and allow us to analyze the results without a physical motor. This will greatly enhance the productivity of the engineers.

Abstract

This paper proposes a robust nonlinear current controller that deals with the problem of the stator current control of a six-phase induction motor drive. The current control is performed by using a state-space representation of the system, explicitly considering the unmeasurable states, uncertainties and external disturbances. To estimate these latter effectively, a time delay estimation technique is used. The proposed control architecture consists of inner and outer loops. The inner current control loop is based on a robust discrete-time sliding mode controller combined with a time delay estimation method. As said before, the objective of the time delay estimation is to reconstruct the unmeasurable states and uncertainties, while the sliding mode aims is to suppress the estimation error, to ensure robustness and finite-time convergence of the stator currents to their desired references. The outer loop is based on a proportional-integral controller to control the speed. The stability of the current closed-loop system is proven by establishing sufficient conditions on the switching gains. Experimental work has been conducted to verify the performance and the effectiveness of the proposed robust control scheme for a six-phase induction motor drive. The results obtained have shown that the proposed method allows good performances in terms of current tracking, in their corresponding planes.

Research in electrical machine design is tilting towards multiphase systems, due its numerous advantages. As the quest for energy efficient systems increases, research in this regard also increases. Mostly in the area of energy conversion systems, notably, the induction machines with the attended high energy demand. An energy efficient motor will definitely reduce cost of industrial processes and save energy. Research reveals that multiphase motors are more economical, efficient and reliable than the traditional three phase motors. In locomotion and ship propulsion systems, multiphase machines are highly recommended because of their improved reliability and efficiency. Depending on the complexity of design, submarines sometimes may need more than one propulsion motor for different operations within the submarine power system network. Some of these submarines are used as warships; as such the designer’s interest is to reduce noise. In order to reduce machine noise, multiphase is proposed in this paper among other advantages comparing with three phase. This paper models a six phase induction motor using state space method to develop models for simulation. Simulation in MATLAB environment carried transient stability studies. The single sixphase is cost effective, reliable and more efficient compared to the three phase machine.