VIBRATION PREDICTION IN A SWITCHED RELUCT ANCE DRIVE WITH RESPECT OF PHASE CURRENT

In order to predict the radial vibration of the stator core of a Doubl y Salient Switched Reluctance Motor (D.S.S.R.M.), different causes of vibrations are considered. In this kind of machine, electromagnetic st ress is found to be the most significant cause of vibrations. The loca l magnetic stress distribution, depending on magnetic field and finall y on the phase current, is calculated in the case of an unsatured oper ation. This magnetic stress acts in two ways: a tangential force (torq ue) and a radial attractive force. This radial force excites the vibra tion modes of the stator, this vibration behaviour is measured in the aligned position and is identified as a transfert function. Finally se veral experiments show the good accuracy of this simple model. This mo del will be later used to study the effect of phase current and of sta tic converter on vibration and acoustic noise emitted by the D.S.S.R.M .