Rotating Electric Machine and Defect Detection Method for Rotating Electric Machine
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsHajime ADACHI, Keiji SUZUKI, Shigeki TOUNOSU
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Abstract
The present invention provides a rotating electric machine and a method of detecting electric discharge (a defect detection method for a rotating electric machine), which are able to early detect vibration sparking between a stator winding and a stator core. A rotating electric machine of the present invention comprises a cylindrical stator including a stator core and a stator winding, a rotor disposed inside the stator, at least one key bar disposed on an outer periphery of the stator core and extended in an axial direction of the stator, and at least one current detector disposed on the key bar and configured to measure a current flowing in the key bar.
Claims20
A rotating electric machine comprising:
- a cylindrical stator including a stator core and a stator winding;
- a rotor disposed inside the stator;
- at least one key bar disposed on an outer periphery of the stator core and extended in an axial direction of the stator;
- and
- at least one current detector disposed on the key bar and configured to measure a current flowing in the key bar.
A defect detection method for a rotating electric machine, comprising the steps of:
- measuring a current with a current detector during an operation of the rotating electric machine, the current flowing in a key bar of the rotating electric machine, the rotating electric machine comprising a cylindrical stator including a stator core and a stator winding, the key bar disposed on an outer periphery of the stator core and extended in an axial direction of the stator, and the current detector disposed on the key bar;
- and
- detecting a change in a waveform of the current during the operation of the rotating electric machine.
Dependencies are inferred from the claim text.