| 摘要 |
PURPOSE:To enable the easy detection of an interlayer bridge of a rotor core, by detecting a phase difference between a phase detected by a magnetic flux detecting coil and a reference magnetic flux serving as a criterion of comparison. CONSTITUTION:Exciting coils 2a and 2b are wound round two probe magnetic cores 1a and 1b respectively. A magnetic flux detecting coil 4 is wound round one probe magnetic core 1a of these probe magnetic cores 1a and 1b. The exciting coils 2a and 2b are electrified by AC current, and thereby magnetic fluxes in the directions reverse to each other are generated from the probe magnetic cores 1a and 1b respectively. In the state wherein a current generated from a conductor in a slot is offset by these fluxes, a phase difference between a phase detected by the magnetic flux detecting coil 4 and a reference magnetic flux serving as a criterion of comparison is detected by a phase difference detector 6. Based on the result of the comparison, the result of inspection is determined by a phase difference determining unit 7. |
