Radial force and torque ripple optimization for acoustic noise reduction of SRM drives via fuzzy logic control

This paper presents a simple procedure for acoustic noise reduction in switched reluctance motor (SRMs) drive. The main sources of acoustic noise in a SRM are the radial magnetic force and torque ripple. Investigations of a radial force require an analytical relationship between motor designs and drive parameters. Thus, in this method two mathematical methods for calculation of radial force and torque have been proposed. These non-linear relations appeared phase current is one of the important factors in the SRM drive parameters because radial force and torque is dependent on square of current, directly. In this paper, torque ripple and radial force reduction with optimization of current waveform by fuzzy logic control has been presented. In the regions that torque reduces and radial force be not maximized the FL inject additional current for each phase currents. This drive has been simulated with MATLAB/SIMULINK for nonlinear model of the SRM. The Simulation results show that proposed drive will decreases maximum radial force and torque ripple but will keep of the maximum torque. This drive has the advantages of simple implementation on the every SRM drive without extra hardware, low cost, high reliability and because of low vibration excellent performance at long term.