| 摘要 |
PURPOSE:To always obtain the prescribed cutting force by varying the duty of a pulse current in response to the rotating speed of a motor. CONSTITUTION:A Hall element 5 detects the rotating speed of a motor 2 by the variation in a magnetic speed and applies it to a waveform processor 6. A calculator 7 calculates the duty of the signal on the basis of the output signal of the processor 6, and outputs a signal corresponding to the rotating speed of the motor 2. A driver 8 controls the base current supplying amount to a switching transistor 4 on the basis of the output signal of the calculator 7. Thus, mustache can be preferably cut irrespective of the density of the mustache. |
