CONTROLLER FOR WIRE-WOUND INDUCTION MACHINE

摘要

PURPOSE:To prevent disturbance from being given to the operating when switching a multiplex control circuit and to suppress an overvoltage based on an appropriate current value depending on the location of the accident. CONSTITUTION:A controller for a wire-wound induction machine is provided with a cycloconverter 5 connected to the secondary winding of a wire-wound induction machine, duplex control circuits 11A and 11B which control the cycloconverter 5, a control circuit selecting means 19 which switches the control circuits 11A and 11B to each other, a switching means 101 which short-circuits the secondary winding, and a switching means control circuit 103 which operates the switching means 101 at the time of switching the control circuits 11A and 11B. A chopper in which a plurality of series circuits respectively consisting of resistors and switching elements are arranged in parallel and a chopper controller which adjust the number of series circuits to be operated are provided as a means which suppresses an overvoltage generated when a short-circuiting accident occurs in a power system.