Patent ID: 8138619

Claim:
A non-grid-connected wind turbine generator system comprising a wind rotor, a generator and a tower, wherein the wind rotor is a fixed-pitch variable-rotation-speed wind rotor, the wind rotor shaft directly drives a rotor of the generator, and the generator is a power-controlled DC generator, a double-salient brushless DC generator, or a double-stator double-salient brushless DC generator, wherein the double-stator double-salient brushless DC generator comprises an inner stator, an outer stator and a rotor disposed between the inner stator and the outer stator; each of the inner stator, the outer stator and the rotor has salient poles, wherein each salient pole of the outer stator toward an inside of the outer stator is corresponding to each salient pole of the inner stator toward an outside of the inner stator, the number of salient poles of each stator is 6n; the number of salient poles of the rotor toward the outside of the inner stator and the number of salient poles of the rotor toward the inside of the outer stator is 4n respectively, where “n” is a positive integer; the salient poles of the rotor toward the outside of the inner stator are staggered with the salient poles of the rotor toward the inside of the outer stator by a mechanical angle of 60°/4n; each salient pole of the outer stator is provided with an armature winding, wherein the armature windings on the salient poles having the same phase are connected in series to form one phase; each salient pole of the inner stator is provided with a concentrated armature winding, wherein the armature windings on the salient poles having the same phase are connected in series to form one phase; and the outer stator and the inner stator are embedded with exciting windings respectively.