CIRCUIT ARRANGEMENT FOR SHORT-CIRCUIT PROTECTION OF GENERATOR OPERATION WITH INDEPENDENT EXCITATION AND FEED-BACK INTO THE NETWORK OF D.C.ELECTRIC MACHINE WITH COMPOUND EXCITATION,申请号HU19820003079-传众专利搜索

CIRCUIT ARRANGEMENT FOR SHORT-CIRCUIT PROTECTION OF GENERATOR OPERATION WITH INDEPENDENT EXCITATION AND FEED-BACK INTO THE NETWORK OF D.C.ELECTRIC MACHINE WITH COMPOUND EXCITATION

申请公布号：HUT34093(A)

申请号：HU19820003079

申请日期：1982.09.24

申请公布日期：1985.01.28

申请人：

GANZ VILLAMOSSAGI MUEVEK,HU

发明人：LAKI B.TAMAS,HU;RAJHATY,GYULA,HU

分类号：H02P3/12;H02P7/06;H02P7/282;(IPC1-7):H02H7/08

主分类号：H02P3/12

摘要：The invention relates to a circuit arrangement for the short-circuit protection of the externally-excited operation of an electrical DC machine which supplies power back into the supply network and has compound excitation, having a series-excitation winding and having one or more controlled switching elements. …<??>The essential feature of the invention is that the series-connected controlled switching elements and the series-excitation winding are connected to the terminals of the armature in such a manner that, when the controlled switching elements are closed, the internal voltage of the armature produces a current in the series-excitation winding whose direction is such that an excitation is produced in the series-excitation winding whose direction opposes the excitation of the external excitation winding, the controlled switching elements being controlled with the aid of sensors which are known per se. …<??>Further advantageous embodiments of the circuit arrangement according to the invention can be characterised in that the controlled switching elements are formed by a thyristor, a thyristor which can be turned off (GTO) or a transistor.