Performance analysis and control of permanent magnet synchronous motor drive over a wide speed range

Abstract

This paper presents the state of the art closed-loop control technique namely the Field Oriented Control (FOC) for a Permanent Magnet Synchronous Motor (PMSM) drive. An effective model implementing FOC with field-weakening control is presented to analyze and control the performance of a PMSM drive over a wide range of speeds including the constant torque and constant power regions of operation. A sinusoidal pulse width modulated (SPWM) three-phase voltage source inverter (VSI) fed low-power surface-mounted PMSM (SMPMSM) drive system is modeled and simulated in MATLAB/Simulink environment. It is analyzed for various dynamic operating conditions for speeds ranging from as low as 100 rpm to 3500 rpm. The maximum speed attainable in field-weakening region is found to be dependent on the machine parameters. This is further validated by the simulation results of the drive under investigation.