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在交一直制电传动内燃机车中,普遍采用直流串激牵引电动机。调节直流串激电动机转速的方法可以用改变端电压和削弱串激磁场两种方法。为了满足机车启动和广宽的速度运用范围,要求对主发电机的输出电压作范围很大的调节。大家知道,同步发电机感应电势是和转速、励磁电流大小有关。但是,拖动同步发电机旋转的柴油机的运用转速是有一定范围的,低于一定的最低转速,柴油机是不能稳定运用。所以仅仅依靠改变柴油机转速来调节牵
In the system has been made of electric transmission diesel locomotive, the universal DC traction motor. The method of adjusting the DC series motor speed can be changed by two methods, such as changing the terminal voltage and weakening the series excitation magnetic field. In order to meet the locomotive start-up and wide range of speed applications, requiring a large range of the main generator output voltage regulation. We all know that the synchronous generator induction potential and speed, the size of the excitation current. However, the synchronous motor generator dragging the rotation speed of the diesel engine is a certain range, below a certain minimum speed, the diesel engine can not be used steadily. So just rely on changing the diesel engine speed to adjust the pull