Dynamoelectric rotary machine with elements for reducing tonal noises

A dynamoelectric rotary machine, comprising:

• a stator having a magnetically conductive body with grooves formed therein and teeth and a winding system disposed in said grooves, said grooves disposed between said teeth of said magnetically conductive body;
• a respective winding head disposed on end faces of said stator;
• a rotor having a cage ring and is disposed rotatably about an axis, and during operation of the dynamoelectric rotary machine said rotor is in electromagnetic interaction in a motor-driven or generator-driven manner with said winding system of said stator disposed in said grooves by way of an air gap formed between said rotor and said stator;
• and
• comb-type elements disposed on said end faces of said stator, and assume an extensive intermediate space between said winding system projecting from said end faces of said stator, so that tonal noises, which are produced during the operation of the dynamoelectric rotary machine, are at least reduced, said comb-type elements being structured segmentally with each segment having multiple tines, and said comb-type elements being formed from an insulating material.