which the denominator n of the number of slots q i e n gt 6 only those winding variants which are illustrated in fig8 are therefore appropriate for this purpose the high additional acceleration torque resulting from the damping of the positive phase sequence subharmonics thus makes use for acceleration drives particularly advantageous synchronous machines such as these can be used advantageously in particular for production machines one significant design criterion is the rotation direction of the rotating fields the rotation direction of 2p na must correspond to that of the synchronous number of useful poles 2p ns the following criterion must therefore be satisfied 2 p ns 2 p na i u00d7 3 where i 1 2 etc the set of stator pole numbers 2p st thus becomes 2p st 2p gs 2p ns wherein 2p st is equal to or greater than 2p gs and 2p ns is greater than 2p gs the number of rotor poles formed by induction conductor loops becomes the ratio of the coil width u03c4 sp to the width of the pole pitch u03c4 p is in this case in particular and is less than 1 33 in known electrical machines the pole pitch u03c4 p in this case denotes the distance between two poles of opposite polarity fig5 shows a synchronous motor 10 with permanent excitation in which the stator 1 is in a housing 11 the stator 1 has.