| 摘要 |
PURPOSE:To accurately and rapidly perform the diagnosis of the defect of a coil to be detected for the presence or absence of the defect by obtaining a position signal with a rotor position detector installed and discriminating a pulsating wave form signal from a magnetic flux detector synchronously with the position signal. CONSTITUTION:A magnetic flux detector 13 is installed oppositely to a rotor 3, and a pulsating waveform signal of the output signal of the detector is inputted to a discriminator 18. Further, a position detector 39 for detecting the position of the rotor is installed, and the position signal of the output signal is inputted to the discriminator 18. Only the pulsating waveform signal corresponding to the predetermined rotor position is produced synchronously with the position signal to discriminate the presence or absence of the defect. In this manner, only the pulsating waveform component of the magnetic flux generated by the current flowing through the rotor coil to be discriminated for the presence or absence of the defect is extracted to discriminate the defect. Accordingly, the defect can be accurately and rapidly diagnosed. |
