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变频器定期检查散热(re)指(zhi)南

日期: 2021-10-28
浏览次数: 232

  能量回馈装置供应商提醒您:如今工控生产中使用变频器越来越频繁,这是一种通过使用变体电路将50HZ电源转换为频率和电压可调的交流电源,以此驱动三相交流异步电机的电气设备。 作为通过由微电子技术和电力电子模块组成的变频器,在实际应用中受环境温度、空气湿度、机械振动、粉尘和腐蚀性气体的影响较大,其电气性能也会发生较大变化。


  长期不对(dui)变(bian)频器(qi)进(jin)行(xing)维(wei)护,会(hui)导(dao)致运行(xing)效(xiao)率以及安全性(xing)的下降。 尤其(qi)是(shi)灰(hui)尘和潮湿的空(kong)气,如果不及时清除,会(hui)造成(cheng)变(bian)频器(qi),内部电子(zi)元件严(yan)重发热,导(dao)致变(bian)频器(qi),出(chu)现故障或缩(suo)短(duan)使用寿命。因此,有(you)必要(yao)对(dui)变(bian)频器(qi)进(jin)行(xing)日常定期维(wei)护。


  变频器日常检查项目:


  (1)电机运行过程中(zhong)声音是否出现(xian)异常变化,包括电机运行过程中(zhong)是否出现(xian)振动。


  (2)变频(pin)器安装环(huan)境(jing)是否发生(sheng)变化。无论环(huan)境(jing)温度是否正(zheng)常,变频(pin)器的工作温度一般在-10℃~+40℃范围(wei)内(nei),最好在25℃左右。


  (3)变频器冷却风(feng)扇工作(zuo)是(shi)否(fou)正常(chang),包括(kuo)变频器冷却通(tong)道是(shi)否(fou)畅通(tong)。变频器在(zai)显(xian)示面板上(shang)显(xian)示电(dian)流、电(dian)压、频率等输(shu)出数据(ju)是(shi)否(fou)正常(chang)。显(xian)示面板上(shang)的字符是(shi)否(fou)清晰,笔画是(shi)否(fou)缺失。


  (4)变(bian)频(pin)器(qi)是(shi)(shi)(shi)否过(guo)热。红外测温仪可用(yong)于检(jian)(jian)测变(bian)频(pin)器(qi)的散(san)热片(pian)是(shi)(shi)(shi)否过(guo)热或(huo)有异味。检(jian)(jian)查变(bian)频(pin)器(qi)在(zai)运(yun)行中是(shi)(shi)(shi)否有故障报警(jing)显示。


  (5)定期清洗电控柜内进(jin)风管(guan)的滤网。始终保持(chi)控制柜和变(bian)频(pin)(pin)器处于良好(hao)的清洁状(zhuang)态。有效(xiao)清除变(bian)频(pin)(pin)器上的表面(mian)灰尘(chen),防止积聚的灰尘(chen)进(jin)入变(bian)频(pin)(pin)器。尤(you)其(qi)是(shi)金(jin)属粉尘(chen)。有效(xiao)去(qu)除变(bian)频(pin)(pin)器冷却风扇上的油污(wu)。


  (6)利用一(yi)年一(yi)次的(de)(de)检(jian)修时(shi)间(jian)开启(qi)变(bian)(bian)频器(qi),将检(jian)查重点放在日常正常操作看不(bu)到的(de)(de)内部(bu)进行清(qing)洗。清(qing)洁变(bian)(bian)频器(qi)的(de)(de)电路板(ban)及(ji)其内部(bu)整(zheng)流模块、IGBT模块、DC滤波电解电容、输入(ru)/输出电抗器(qi)等。用刷子(zi)或真空吸尘器(qi)。更换不(bu)合格(ge)的(de)(de)电子(zi)元器(qi)件(注;变(bian)(bian)频器(qi)内部(bu)滤波电容一(yi)般(ban)需要4~5年更换一(yi)次)。


  (7)检查冷(leng)(leng)却风(feng)扇(shan)(shan):由于冷(leng)(leng)却风(feng)扇(shan)(shan)需要长时间连续运转,是一(yi)个(ge)容易损坏(huai)的部件。它(ta)的寿命受到轴(zhou)承(cheng)的限制(它(ta)是一(yi)个(ge)轴(zhou)流风(feng)扇(shan)(shan))。根(gen)据变频器,风(feng)机或风(feng)机轴(zhou)承(cheng)通常每2~3年(nian)更换一(yi)次。

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