(2)松下变频器逆变模块损坏
在VF—7F系列变频器中,有时也会碰到逆变模块的损坏。较多见的景象即是变频器在正常作业中突然失电,致使变频器在从头上电后无法发动电机。经查看逆变模块损坏,究其原因首要是因为停电后变频器还在作业指令的操控下,而此刻因为电机所带负载的耗费及变频器本身的耗费致使中心直流电压急剧下降,简单致使PWM调制波信号发作改动,致使功率模块的损坏,通常在这种情况下,驱动电路是不简单损坏的。替换逆变模块,变频器就能康复正常作业。碰到此类情况,最佳能够在操控电路上采纳措施,停电刹那间封闭变频器输出。
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