COMPARISON OF PERFORMANCES OF SYNCHRONOUS MAGNET MACHINES AND RELUCTANCE MACHINES (WITH OR WITHOUT PERMANENT-MAGNETS)

The subject of this article is to compare the performances of electric al machines using three different principles of functioning which are recently exploited. We consider possibilities to realise actuators wit h high torque and power per unit of mass for direct drive applications . The three different machines involved in the comparison are: (i) the classical synchronous structure with permanent magnets in the inducto r, (ii) the vernier reluctance structure, (iii) the vernier reluctance structure with permanent magnets. To allow a good comparison, the arc hitecture of those three motors has to be identical, particularly the shape of the main elements.