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Controller for electric railcar

阅读:243发布:2021-08-30

专利汇可以提供Controller for electric railcar专利检索,专利查询,专利分析的服务。并且PURPOSE:To eliminate a contactor for switching power drive/brake circuit by using a resistor and a contactor for controlling a field weakening and further a field weakening controller and a brake circuit at power drive time in the same manner. CONSTITUTION:A field exciter 6 is not operated in a full field range at power drive time, and a main circuit current is flowed only through a bypass diode 10. As the speed of an electric railcar rises, the resistance of a main resistor 1 is sequentially shortcircuited. A field contactor 8 is closed in a field weakening control range at power drive time, and the exciter 6 starts operating. A regenerative brake current IB is flowed to all induction branches 3 similar to the field weakening control range. A field current IF is supplied from the exciter 6 to flow a closed loop of the branches 3 and the field winding 2.,下面是Controller for electric railcar专利的具体信息内容。

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