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LG變頻器維修常識

發布日期:2022-10-09 點擊率:69 品牌:LG

    LG變頻器維修常識
   
       本人從事變頻器維修多年,今碰到LG變頻器is5系列7.5千瓦一臺,故障運行OC,想給大家分享一下,
    起初,客戶說變頻器老是保護,沒法正常工作,就拿來維修,在公司上電才知道變頻器運行過電流,當初懷疑電流檢測部分出了問題,就開始檢查電流檢測線路以及霍爾元器件,經測試沒有任何問題,左后把IGBT模塊去掉直接上直流電壓,才發現驅動部分六路直流電壓不平均,左后發現,驅動電路有一小貼片電阻損壞,更換之后,變頻器正常了,
   

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