| 摘要 |
PURPOSE:To equalize a magnetic field applied to a magnetic detector by burying all magnetic detectors in one of printed coils which forms a coil unit. CONSTITUTION:A plurality of spiral patterns 3 are formed on both sides of a printed coil support to form a printed coil. All magnetic detectors 8 are buried in one of printed coils which form a coil unit. Thus, since distances from a magnet to the detectors accurately coincide, a magnetic field applied to the detectors becomes constant. The coil buried with the detectors 8 is disposed nearest the magnet in the unit. Thus, since the magnetic field applied to the detectors is strengthened, the switching timing of a current can be accurately set to reduce an irregular torque. |
