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介绍了ＩＧＢＴ过流的特点和过流保护的特殊问题，给出了过流保护的方法和综合保护的方案，并进行了试验，还介绍了过流保护中的抗干扰措施
The characteristics of IGBT overcurrent and the special problems of overcurrent protection are introduced. The methods of overcurrent protection and the scheme of integrated protection are given, and the experiments are conducted. The anti - interference measures in overcurrent protection