| 摘要 |
PURPOSE:To enhance the efficiency of rotation control of a rotor by so controlling to rotate the rotor as to drive it in an optimum rotary phase. CONSTITUTION:The amplitudes of driving currents of phases flowing to motor windings 2-5 are varied in response to a speed control signal supplied from a speed controller 7 to the base of a transistor 15. Accordingly, the rotating speed of the rotor 1 which is continuously rotating is so automatically controlled as to become a target speed set to the controller 7, i.e., a predetermined constant speed, and the started rotor 1 of the motor is eventually driven to be rotated at the predetermined constant speed. |
