| 摘要 |
PURPOSE:To prevent a moving magnetic-field-generating device from an occurring of overheat by stopping the device while keeping a rotary drum and a cool- ing blower in continuous running, at the time of detecting the abnormal temperature by a temperature detecting element built into the device. CONSTITUTION:When an iron core 14 rises to the abnormal temperature in normal running, a temp. detecting element 21 detects it, and both a temp. detector TC and an abnormality-detecting auxiliary relay R are turned ON, and successively an electromagnetic contactor MC is turned OFF to stop the running of a moving magnetic-field-generating device 13 and simultaneously inform the abnormality by turning an alarming buzzer BZ ON. In this case, as a drum 6 is kept to rotate continuously an the iron core 14 is also kept to be forcibly cooled continuously by a cooling blower, a deformation of the drum 6 caused by the abnormal temp. is prevented, and an insulation deterioration and a burned-out damage of a coil of the device 3 are prevented at the same time. |
