CPC H02K 3/16 (2013.01) [H02K 3/487 (2013.01)] | 19 Claims |
1. A short-circuit generator which comprises a rotor and a stator located around an outer periphery of the rotor so as to enclose a rotor central axis thereof, said stator having stator slots in which windings are placed, and said stator slots each having a depth in a radial direction perpendicular to the rotor central axis whose ratio divided by a width of the stator slot in a direction perpendicular both to the radial direction and a direction of the rotor central axis, is less than three,
wherein the rotor comprises: a rotor core in which plural magnetic poles and plural rotor slots are formed; a field winding placed in each of the rotor slots; a metallic damper bar placed in each of the rotor slots on an outer periphery side of the field winding; and a metallic wedge placed in each of the rotor slots on an outer periphery side of the damper bar and connected to the damper bar; and
wherein a damper-bar height that is a height of the damper bar in the radial direction is less than a wedge height that is a height of the wedge in the radial direction, and
the rotor includes, each as one of the rotor slots, a rotor slot in which the wedge of a first material is placed, and a rotor slot in which the wedge of a second material that is lower in electric conductivity than the first material is placed.
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