| 摘要 |
PURPOSE:To stabilize the control of apparatus over the whole frequency region by making the corrective gain of a slip frequency variable by the use of a speed feedback value as a parameter. CONSTITUTION:A controller for an uncirculating current type cycloconverter 13 is composed of a torque current dividing regulator 22, an excitation current dividing regulator 23, a primary lag operator 24, a speed-phase detection circuit 32, first-fourth signal generator circuits 51-54 and others. Further, a set point to be a manipulated variable to each-phase gate pulse generator circuits is inputted to a gate controller 11 so that the positive and negative groups of converters are driven and controlled. In this case, there is provided a slip frequency corrective circuit 50 by the use of a rotor speed feedback value as a parameter. Thus, a torque current dividing feedback value is multiplied by a preset corrective gain corresponding to a speed feedback value at that time. As a result, a corrected slip frequency is obtained and a slip phase obtained by a further integration is corrected, too. |
