Description
过流过压在直流调速器上的反应，都是输出不稳定，脉冲缺失的保护，正好对应了输出不稳定故障。根据维修abbdcs系列调速器的经验，输出不稳定，还得分重载和轻载！？如果重载输出不稳定，一般故障出在功率驱动前后级或功率模组；如果轻载重载输出都不稳定，（甚至飞车）故障一般出在电机反馈电路。由于客户现场使用电机较大，达几百个千瓦，电话联系时，我确定了马达碳刷没有打火，且故障机原来一直使用中，故障出现后，不管轻载还是重载，电枢电流都波动很大。
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