专利名称：Electronic control circuit for a separately
excited DC machine
发明人：Quang M. Pham申请号：US06/218986申请日：19801222公开号：US04386299A公开日：19830531
摘要：An electronic circuit designed to control entirely by electronic means thechange from traction mode to braking mode and vice- versa of a separately excited DCmachine and the forward and reverse operation of the motor as well as rheostaticbraking. The chopper includes two main thyristors (T1) and (T2) and a single switch-offthyristor (T3) for the two main thyristors. The direction of current flow through theseparate excitation winding (J) is determined by four thyristors (T5) to (T8).< P>
Application to railway traction.
申请人：SOCIETE ANONYME DITE: ALSTHOM-ATLANTIQUE
代理机构：Sughrue, Mion, Zinn, Macpeak and Seas
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