| 摘要 |
PURPOSE:To easily manufacture a miniaturized monitor with a speed detector by forming a protruding part in a rotor end face, by sticking an annular magnet having a recessed part to the rotor end face so that the protruding part may be fitted to the recessed part having a rectangular section, and by burying an element of the detector in resin of a stator so as to face the protruding part. CONSTITUTION:An end ring 2a having a protrusion part 2b is stuck to the peripheral part in one end face of rotor core 2. An annular speed detecting magnet 1 is provided with a circular recessed part 1a, which is fitted and stuck to the protrusion part 2b of the end ring 2a by an adhesive agent. A speed detecting element 7 is embedded in resin 6 forming a stator 3 at a position corresponding to the speed detecting magnet 1. While a rotor 8 is rotated, speed signals are generated by the speed detecting element 7, and inputted to a phase control circuit (not shown) to obtain the rotational speed of the motor. Thus, a small inexpensive device is formed with good workability. |
