| 摘要 |
PURPOSE:To obtain preferable control performance by obtaining the magnitude of an influence caused by a smoothing condenser from a speed command by a vector control and controlling a current and a phase in response thereto. CONSTITUTION:A vector controller 7 adds a slip frequency conversion of a load torque TL to a deviation between a speed command wS and a real speed wR to obtain a slip frequency wS. The frequency command (w) of an inverter 2 is obtained by the frequency wS and An actual speed wR. The current command I of a converter 1 and the phase angle command theta of the inverter 2 in which the difference between the output current vector of the inverter 2 and the current vector flowing to the condenser CS become a current vector necessary to control an induction motor 3 by the frequency wS and an exciting current command Im are obtained. |
