| 摘要 |
PURPOSE:To enable the regeneration even through the motor is stopped and then rotated by connecting a regenerative capacitor in parallel with a regenerative diode. CONSTITUTION:When a main thyristor SCR1 is turned on under the state a switch MC is closed, a current flows in the motor. When a commutation thyristor SCR2 is turned on after the predetermined time, a commutation capacitor C0 is discharged. The main thyristor SCR1 is turned off by the discharge of the reverse charge which is applied to the capacitor C0 after aforementioned discharge. Thereafter the motor is controlled by the chopper by the same way. When the switch MC is turned off under this state, the motor acts as a generator, and the power is regenerated to the power source B through the path of A-SR2-B-SR1-F-A. If on and off of the main thyristor SCR1 are continued even though the rotation of the motor stopped, the charge and discharge of the capacitor C1 is repeated and series winding F is excited. Therefore, the regeneration is possible even though the motor is stopped and then rotated. |
