Based on the analysis of the differential protection of the double winding transformer, the paper presents a simplified ratio restraint algorithms for the three phase, three winding transformer.
在分析双绕组变压器的差动保护算法的基础上，提出了适用于三相三绕组变压器的比率制动式算法，并对判据进行了简化。
On the basis of analysis of block diagram of AC speed driver system with speed and slip ratio double closed loops, a system design method is presented with the four quadrants experiment results.
在分析转速、转差双闭环交流调速系统动态结构图的基础上，提出了系统的设计方法，并给出了四象限运行实验结果。
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