| 摘要 |
PURPOSE:To make a construction of the motor, by providing a recessed and protruded portion on pole surfaces of a permanent magnet in the motor main unit, further by providing a generating wire element facing near to the above, to use a main flux of the permanent magnet as a flux generating source for the frequency generator. CONSTITUTION:Facing an axial-way permanent magnet 3 of doughnut-shape, installed to a rotary shaft 2, a plurality of driving coils 6 are provided on one side of a printed base board 7 and a Hall element 8 arranged on another side, simultaneously with a recessed part 9 provided in a peripheral end face part of the permanent magnet 3, and all of the recessed parts 9B of S-pole are made shifting to the location of half pitch with respect to the recessed parts 9A of N-ole, further with a generating coil 10 of sqare wave-shape provided in the printed base board 7. Consequently, as a voltage, generated by a change of the gap between the recessed parts 9 of the permanent magnet 3, is added with a voltage of the same phase, a frequency signal, proportional to the pitch, can be generated in the coil 10, thus capable of simply providing a hybrid unit made of the motor and the frequency generator. |
