| 摘要 |
PURPOSE:To simplify a sequence by controlling ON, OFF an inverter, synchronizing a regenerative current with the phase voltage of a power source, and so controlling a charging voltage ag to be equal to a voltage command value. CONSTITUTION:A secondary current command due to a deviation between a speed command of an induction motor side IM and a rotating speed is compared with a DC current of a converter X, a chopper X2 is controlled ON, OFF so that the secondary current of the motor IM becomes equal to a secondary current command value, and the rotating speed of the motor IM becomes equal to a speed command value. On the other hand, the phase voltage EAC of a power source is multiplied by the current command due to a deviation between the voltage command of the motor IM side and the charging voltage of a charger/discharger circuit X4 to obtain a current command synchronized with the voltage EAC. The current command is compared with the line voltage of each phase to control the inverter X1 so that the charging voltage becomes equal to the voltage command value, and a regenerative current is controlled synchronously with the voltage EAC of the power source. |
