ROTATING ELECTRIC MACHINE

PROBLEM TO BE SOLVED: To provide a rotating electric machine for avoiding resonance due to a natural frequency of a stator as one of the causes of noise or vibration in the rotating electric machine.SOLUTION: A plurality of grooves 7 are previously provided on the outer circumference of a stator 3 attached to the inside of a casing of the rotating electric machine, and a ring-like fixing member 8 is attached on the end surface of the stator 3 via an attaching member 9 etc., thereby changing the natural frequency of the stator 3 to avoid the resonance. The material and size of the fixing member 8 is changed depending on the condition of the resonance, and thus, even if a frequency for driving the rotating electric machine using an inverter is optionally selected, the natural frequency is changed to avoid the resonance. Further, by employing a structure in which the material and size of the fixing member 8 can be optionally selected and attached to the stator 3 even after installing the rotating electric machine, the natural frequency is changed to avoid the resonance.