| 摘要 |
PURPOSE:To improve the accuracy by inputting the rotational speed of rotor and the difference between estimated values and actual values of d-axis component and q-axis component of armature voltage and outputting correcting amounts of d-axis and q-axis component which are added to the input of current model flux operation. CONSTITUTION:Multiplication of speed polarity 32 is carried out, for example, prior to input to compensators 28, 29. The compensators 28, 29 are provided with primary lag filters in the proportional and integrating operations. When correcting amounts of d-axis and q-axis components 26, 27 are fed to the primary lead and lag 8, 9 in a flux operating means 19, transfer function from the d-axis and q-axis components 10, 11 of armature voltage to the estimated d-axis and q-axis components 22, 23 of the armature voltage can be primary lagged. Consequently, d-axis and q-axis components 6, 7 of armature interlinkage flux converge exponentially to actual flux. When a synchronous motor stops, gain of correction loop goes zero and only the flux operating means 19 performs operation based on a current model. |
