橋式起重機電氣係統故障現象及原因分析

主電機回路一般包括主電機繞組、電阻箱中串聯電阻、kongzhixiangzhongdejiaoliujiechuqiheliandongxianludeng。youyuqiaoshiqizhongjizaizhengchanggongzuoshi，dianzuxiangzhongdedianzuzudabufenshijianjuntouruyunxing
，yincijiangchanshengdaliangdereliang
，congershidianzuzudewendujiaogao。zaigaowenhuanjingzhong，wulunshidianzubenshenhaishidianzulianjieduanzijunyibianzhi。yifangmianjianggaibiandianzucaizhi，yinqidianzuzuzhidegaibian：另ling一yi方fang麵mian可ke能neng導dao致zhi電dian阻zu連lian接jie端duan子zi的de斷duan裂lie，使shi得de電dian機ji轉zhuan子zi或huo定ding子zi的de串chuan聯lian電dian阻zu阻zu值zhi不bu平ping衡heng。與yu此ci同tong時shi，橋qiao式shi起qi重zhong機ji工gong作zuo過guo程cheng中zhong各ge種zhong交jiao流liu接jie觸chu器qi的de切qie換huan頻pin率lv特te別bie高gao
，其qi觸chu點dian很hen容rong易yi在zai頻pin繁fan的de切qie換huan中zhong損sun傷shang、老(lao)化(hua)，造(zao)成(cheng)部(bu)分(fen)觸(chu)點(dian)接(jie)觸(chu)電(dian)阻(zu)變(bian)大(da)或(huo)發(fa)生(sheng)缺(que)相(xiang)現(xian)象(xiang)，使(shi)電(dian)機(ji)繞(rao)阻(zu)的(de)串(chuan)聯(lian)電(dian)阻(zu)阻(zu)值(zhi)不(bu)平(ping)衡(heng)。在(zai)上(shang)述(shu)兩(liang)種(zhong)情(qing)況(kuang)下(xia)
，起(qi)重(zhong)機(ji)重(zhong)載(zai)或(huo)長(chang)時(shi)間(jian)工(gong)作(zuo)時(shi)均(jun)會(hui)導(dao)致(zhi)電(dian)機(ji)損(sun)壞(huai)等(deng)故(gu)障(zhang)。

zhugongdianxitongguzhangzhuyaoshigongdianhuachuxianguzhang。ruyouhuachuxianyinqideduandianxianxiang
，daoguanmingxianbianxingzaochengshoudianqiwufayidong，dianshuacemiancashanghebiaomianyoulizhuangaokeng，gongzuoshidaoguanhuangdongtaida，dianshuamosuntaikuai，dianqihuaxingyoujiaodashengxiangjiwaikecashangdeng。qiyuanyinwangwangshidaoguianzhuangbuheshiyinqidebianxing，huanjingwenduguogaorepengzhangzaochengkasixianxiang，shoudianqidebuzhengqueanzhuangjidingweipianchadeng。

電(dian)氣(qi)係(xi)統(tong)中(zhong)的(de)電(dian)子(zi)元(yuan)器(qi)件(jian)的(de)質(zhi)量(liang)問(wen)題(ti)會(hui)導(dao)致(zhi)主(zhu)電(dian)機(ji)和(he)其(qi)他(ta)電(dian)機(ji)的(de)損(sun)壞(huai)。如(ru)交(jiao)流(liu)接(jie)觸(chu)器(qi)質(zhi)量(liang)差(cha)
，機(ji)械(xie)可(ke)靠(kao)性(xing)不(bu)好(hao)
，線(xian)圈(quan)發(fa)熱(re)

，吸(xi)合(he)不(bu)好(hao)及(ji)線(xian)圈(quan)燒(shao)壞(huai)；各ge種zhong保bao護hu繼ji電dian器qi質zhi量liang差cha及ji損sun壞huai。有you的de交jiao流liu接jie觸chu器qi觸chu點dian含han銀yin量liang低di或huo接jie觸chu銅tong片pian選xuan用yong鍍du銅tong鐵tie片pian，接jie觸chu器qi塑su料liao外wai殼ke薄bo或huo使shi用yong再zai生sheng塑su料liao，因yin而er造zao成cheng觸chu點dian接jie觸chu不bu良liang，冒mao火huo花hua和he易yi熔rong化hua，三san相xiang觸chu點dian彈dan簧huang壓ya力li不bu均jun和he外wai殼ke破po裂lie等deng。

電源電壓瞬時降低。由於主電機（起升電機）功率大（一般在15kW以上），又you是shi全quan電dian壓ya起qi動dong，如ru果guo橋qiao式shi起qi重zhong機ji安an裝zhuang地di點dian距ju電dian源yuan變bian壓ya器qi較jiao遠yuan或huo專zhuan用yong供gong電dian線xian路lu上shang搭da載zai有you其qi他ta較jiao大da功gong率lv的de電dian器qi，且qie選xuan用yong的de電dian源yuan供gong電dian線xian的de線xian徑jing較jiao小xiao時shi，就jiu會hui使shi電dian源yuan電dian壓ya瞬shun時shi降jiang低di，有you時shi造zao成cheng電dian源yuan電dian壓ya降jiang低di值zhi大da於yu額e定ding值zhi的de10%。電源電壓降低必然會使電機的起動時間加長或造成起動困難，也會導致電機損壞。