| 摘要 |
PURPOSE:To eliminate the irregularity in the decelerating time caused by the mechanical loss at the naturally declerating time by naturally decelerating hysteresis motor groups while connecting them in parallel with each other. CONSTITUTION:An AC power source 1 supplies electric power through a switch 2 to hysteresis motors 3-1, 3-2,...3-N via breakers 4-1, 4-2,...4-N. A wire a detects the voltage of a common bus, and wires b-1, b-2,...b-N respectively detect the counterelectromotive forces of the hysteresis motors 3-1, 3-2,...3-N. Discriminators 6-1, 6-2,...6-N identify the necessity of maintenance of the motors 3-1, 3-2,...3-N. When the motors 3-1, 3-2,...3-N are decelerated by natural deceleration, the motor group are naturally decelerated while connecting in parallel with each other. |
