| 摘要 |
PURPOSE:To continuously monitor the insulation deterioration of the stator winding of a rotary electric machine while the machine is operated by installing a detector and filter by utilizing that an insulator which supports the internal conductor of the isolated-phase bus of the rotary electric machine has the function of a coupling capacitor. CONSTITUTION:By installing an insulator 6a which supports the internal conductor 5 of an isolated-phase bus connected to the stator winding 28 of a rotary electric machine to the sheath 4 of the isolated-phase bus through a detection circuit 8, a high-frequency current propagated in the conductor 5 by a partial discharge generated in the winding 28 is led to an external filter 10, partial discharge measurement circuit 11, spectrum analyzer 12, etc., through a measurement conductor 9 and continuous monitoring is performed. Therefore, a rotary electric machine provided with an isolated-phase bus incorporating an inexpensive high-sensitivity partial discharge monitoring device can be obtained. |
