天津冷却塔维修 天津冷却塔维修多少钱

 澳门皇冠足彩     |      2019-10-18


天津冷却塔维修多少钱

        天津冷却塔维修多少钱,支撑电容在整个功率模块中起到较重要的作用,支撑电容长期在高频谐波作用下,容易引起绝缘老化等问题,并且支撑电容寿命受使用环境温度影响很大,如系统由于后期维护缺失,散热效率达不到设计要 天津冷却塔维修 求,支撑电容就可能出现爆炸、漏液等故障。所有返回的模块,我们都将测量所有支撑电容的容值,对于容值低于额定值的电容,均会做更换处理。并且会对电容做耐压试验.


        驱动电路不能输出正常的驱动脉冲,多为电流输出能力不足。一是驱动IC的后置放大器低效,元件变值等。二是驱动供电不良;不能达到足够的电压幅值和输出足够的驱动电流,使IGBT不能被良好开通或处于导通与 天津冷却塔维修 截止的临界点上,IGBT管压降检测电路检测到大于7V的管压降信号而报出OC故障。驱动供电电源电压的低落为驱动IC内部欠电压电路所侦测,驱动IC报出OC故障。


        检查变频器散热风扇,发现散热风扇不工作,用万用表检测散热风扇电源正常,停电后用万用表检测散热风 天津冷却塔维修 扇回路开路,判断为散热风扇损坏,更换散热风扇后,变频器上电运行正常。


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