| 摘要 |
PURPOSE:To permit the control of the magnetic flux and the torque of a motor respectively by a method wherein a slip-angle frequency, the magnitude of the secondary current and phase angle are calculated from the setting values of an exciting current and a torque current and the primary current is controlled by preparing the primary current command. CONSTITUTION:The outputs of a torque current setting device 3 and an exciting current setting device 4 are supplied to an arithmetic circuit 5 and the output in the arithmetic circuit and the signal in the pulse generator 7 of a motor 2 are added and an exciting current angle frequency is obtain to feed into an oscillator 9. Next, operation is performed in an arithmetic circuit 10 with the output in the arithmetic circuit 5 and the instantaneous value of an exciting current is added and the command signal of the primary current instantaneous value is obtain to control a power converter so that the command signal may agree with an actual current. Therefore, each of the torque and the magnetic flux can independently be controlled to fix the current in an exciting circuit having high time constant at the time of controlling the torque and response can be improved by controlling the current in the secondary circuit having low time constant by a slip angle frequency. |
