| 摘要 |
PURPOSE:To equalize the energizing time duration of a drive coil by differentiating the width of N- and S-poles of a position detecting magnet so that the pole parts corresponding to the section for obtaining ON signals of a position detectors becomes slightly wide. CONSTITUTION:Position detecting magnet 8 is provided oppositely to a position detector 7. This position detecting magnet 8 is magnetized in the same polarity as a rotor magnet 6, and N- and S-pole magnetizing widths are differentiated so that the pole (N-pole) part corresponding to the zone for obtaining the ON signal of a position detector 5 becomes slightly wide. In this manner, the ON and OFF widths of the outputs after the output of the detector 7 is amplified become equal to each other. |
