| 摘要 |
PURPOSE:To enable to regulate the rotating speed of a motor by controlling the current flowed through the motor by connecting a conductor having high resistivity as a variable resistor between the motor and a power source. CONSTITUTION:A conductor having high resistivity is connected in series with a variable resistor 2 between a motor 1 and a power source 3. Thus, the motor 1 has low load resistance, the current cannot be regulated directly by the normal variable resistor, but the current of the motor 1 can be regulated directly by using the resistor 2 of a conductor having high resistivity, thereby controlling the rotating speed of the motor per one second. |
