| 摘要 |
PURPOSE:To enable operation of a load machine load machine using a small motor under necessary and sufficient condition, by a method wherein AC voltage to drive the motor is controlled so that rotational speed of the motor always becomes the maximum torque generating rotational speed. CONSTITUTION:AC voltage supply to a motor 1 is performed through a voltage regulator 3 from a power source 4. Output voltage of the voltage regulator 3 is controlled by a signal generated by a rotational speed detector 5. Then if the output voltage of the voltage regulator 3 is controlled so as to constantly maintain a rotational speed to generate maximum torque, a small motor may be used to operate a load 2. |
