| 摘要 |
PURPOSE:To hold the torque and the voltage of the induction motor at predetermined values by controlling the instructing values for the secondary current component and exciting current component to become coincident always to the actual values. CONSTITUTION:There is provided a current pattern circuit 11' for producing an AC signal for instructing a primary instantaneous value in response to the output signals from current control circuits 16, 17 with the output signal from an oscillator 10' as a reference. There are also provided a current component detector circuit 15 for detecting the secondary current component I2f of the primary current and the exciting current component Imf of the induction machine 3, a current control circuit 16 operating in response to the deviation between the signal I2p for instructing the secondary current component with the output signal of the speed control circuit 6 and the secondary current component I2f detected by the circuit 15, and a current control circuit 17 operating in response to the deviation between the output signal Imp of the exciting current instructing circuit 7 and the exciting current component Imf detected by the circuit 15. Thus, the current is always controlled so that the secondary current component instructing signal is coincident to the detection signal and the exciting current component instructing signal to the detection signal. |
