| 摘要 |
A load state detecting apparatus of an induction motor having two coils, the apparatus having a drive voltage supplying unit for supplying a drive voltage to the coils in the induction motor, a phase difference detecting unit for detecting a phase difference between the drive voltage supplied across the coils of the induction motor and a current flowing through one of the coils upon application of the drive voltage and for generating a phase difference signal, and a load state detecting unit for comparing the phase difference signal generated by the phase difference detecting unit with a predetermined reference value and generating a signal depending on a load state of the induction motor. |
