| 摘要 |
<p>An electrical synchronous machine having a slotted stator and having a rotor equipped with salient poles which are adjustable in number to enable the machine to operate at 50 and 60 Hz is equipped with an improved stator winding. The number of poles for each of these frequencies defines a corresponding pole pitch. The improved stator winding is a switchable stator winding having a plurality of coils arranged in the slots of the stator so as to be two coil sides deep thereby defining a two-layer symmetrical three-phase winding wherein the number of slots per pole per phase, q, is given by: z q = (n>/=1) n WHERE THE NUMERATOR, Z, IS SELECTED SO AS TO BE DIVIDABLE BY 6 WITHOUT REMAINDER FOR 50 Hz operation and by 5 without remainder for 60 Hz operation, and wherein at least one of the following conditions is satisfied:</p> |
