| 摘要 |
PURPOSE:To vary the rotating speed of a motor with less speed difference by inserting a diode into a drive circuit, connecting a resistor in parallel with the diode to drop the voltage applied to the motor. CONSTITUTION:When a changeover switch contact piece 15 is disposed at a position H, a current from a battery 1 is supplied directly to a motor 2. When the piece 15 is disposed at a position M, a current from the battery 1 is supplied through a parallel circuit of a resistor 6 and a diode 4 to a DC motor 2. When the piece 15 is disposed at a position L, the current from the battery 1 is supplied through a parallel circuit of a resistor 5 and a diode 3 and a parallel circuit of a resistor 6 and the diode 4 to the motor 2. Thus, the rotating speed difference between the rotating speeds can be reduced. |
