Investigations on hybrid intelligent Controllers applied to an improved Soft switched BLDC motor drive

Abstract

Brushless Direct Current BLDC motor is a type of Permanent newlineMagnet Synchronous Motor PMSM with electronic commutator It newlinepossesses several advantages over other motors Reduced mechanical losses newlinehigh efficiency fast dynamic response better speed torque characteristics newlinenoiseless operation high torque weight ratio maintenance free higher speed newlinerange operation and excellent overall performance are some of the advantages newlineof BLDC motor which makes it an efficient competitor for other drives In newlinerecent years Permanent Magnet Brushless Direct Current PMBLDC motor newlinedrives are increasingly popular in industrial applications due to fast progress newlineof technologies in power electronics and the growing demand for energy newlinesaving The increasing demand of energy saving from society is the external newlineforce for the development of PMBLDC motor drives newlineBLDC motor is usually driven by a hard switching Pulse Width newlineModulation PWM inverter which has low switching frequency high newlineswitching loss high Electro Magnetic Interference EMI high acoustic noise newlineand low efficiency etc To solve these problems of the hard switching newlineinverter many soft switching inverters have been designed in the past newlineUnfortunately high device voltage stress large dc link voltage ripples newlinecomplex control scheme and so on are noticed in the existing soft switching newlineinverters newline newline