| 摘要 |
PURPOSE:To maintain the response of control systems irrespective of the primary frequency by associating a compensating element relating to the primary frequency and current control system. CONSTITUTION:Components eq of phase difference of 90 deg. to and components ed of the same phase as an exciting current phase reference signal are respectively detected by voltage detectors 19, 20. A d-axis voltage signal ed is compensating for the gain corresponding to the primary frequency command by a gain compensator 8, thereby obtaining an equivalent signal to the magnetic flux phiq of the q-axis component. The primary frequency is controlled by this signal. On the other hand, the component eq is subtracted by an adder 5 from the q-axis voltage command. This deviation can detect a signal equivalent to the deviation between the command of the magnetic flux of the d-axis component and the detected value by compensating the gain corresponding to the primary frequency command by the gain compensator 6. The torque current it* is altered in response to the deviation to control the rotating speed. |
