CONTROL DEVICE FOR AC/DC CONVERTER

摘要

PURPOSE:To enhance the stepping response by controlling the general transfer function of a constant-current control circuit by the presence or absence of a start command or a tide inverting command. CONSTITUTION:The control element 7 of a constant-current control circuit is composed of a primary delay element 8, and a compensating element (primary lead element 9 and a proportional element 10) to be switched by a control switch 11 and added to the element 8. A switch 12 is closed by a reverse conversion command, a current margin is added through the switch 12 to a subtraction point P1, and the deviation from the set current value is butted to the DC current measured value of a system at the subtraction point Pr. The switch 11 is conducted between the contacts (a) and (c) by the start command or the tide inverting command, and conducted between the contact (b) and (c) except the previous case.