日常檢(jian)(jian)查和(he)(he)保養主(zhu)要是操(cao)作(zuo)人員以視覺(jue)(jue)、聽覺(jue)(jue)、嗅覺(jue)(jue)再(zai)加上(shang)電(dian)表、溫度計等(deng)建(jian)議的(de)儀器進(jin)行的(de)。從啟動(dong)和(he)(he)轉動(dong)中判斷電(dian)動(dong)機(ji)(ji)是否正常運轉。其(qi)他(ta)比如(ru)易(yi)磨損的(de)零(ling)件的(de)損耗程度、線圈(quan)的(de)積(ji)塵及劣化、開(kai)關節(jie)點有無損耗等(deng)情況(kuang)則無法日常檢(jian)(jian)查。只(zhi)有停(ting)機(ji)(ji)檢(jian)(jian)查并對異(yi)常部(bu)件給(gei)與更換，才能保證電(dian)機(ji)(ji)的(de)壽(shou)命(ming)和(he)(he)防止(zhi)故障(zhang)發生(sheng)。由于使用(yong)條件的(de)差異(yi)，定期檢(jian)(jian)查和(he)(he)保養的(de)周(zhou)期不一(yi)樣，雖(sui)然很難定出一(yi)個固定周(zhou)期，但至少每隔(ge)半年(nian)或者一(yi)年(nian)進(jin)行一(yi)次檢(jian)(jian)查保養。決定電(dian)機(ji)(ji)保養周(zhou)期的(de)因素如(ru)下：（1） 使用(yong)環(huan)境。（2） 啟動(dong)、停(ting)止(zhi)的(de)頻繁(fan)程度。（3） 易(yi)磨損零(ling)件的(de)使用(yong)壽(shou)命(ming)。（4） 電(dian)動(dong)機(ji)(ji)在整個傳動(dong)系統中的(de)重要程度。電(dian)動(dong)機(ji)(ji)防腐蝕等(deng)級劃分標準和(he)(he)代號是什么？江蘇WEG防爆電(dian)機(ji)(ji)生(sheng)產廠家

IP54:能(neng)防(fang)止(zhi)觸及或(huo)(huo)接(jie)近殼內帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)或(huo)(huo)轉(zhuan)動部(bu)件 雖(sui)(sui)不(bu)(bu)能(neng)完(wan)全(quan)防(fang)止(zhi)灰塵(chen)(chen)(chen)進(jin)(jin)(jin)(jin)(jin)入(ru)，但進(jin)(jin)(jin)(jin)(jin)塵(chen)(chen)(chen)量(liang)(liang)不(bu)(bu)足以(yi)(yi)影(ying)(ying)響(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)正(zheng)常運(yun)行。承(cheng)(cheng)受(shou)(shou)任(ren)何方(fang)向(xiang)的(de)(de)濺(jian)水(shui)(shui)應(ying)(ying)無有(you)害(hai)影(ying)(ying)響(xiang)。IP55:能(neng)防(fang)止(zhi)觸及或(huo)(huo)接(jie)近殼內帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)或(huo)(huo)轉(zhuan)動部(bu)件 雖(sui)(sui)不(bu)(bu)能(neng)完(wan)全(quan)防(fang)止(zhi)灰塵(chen)(chen)(chen)進(jin)(jin)(jin)(jin)(jin)入(ru)，但進(jin)(jin)(jin)(jin)(jin)塵(chen)(chen)(chen)量(liang)(liang)不(bu)(bu)足以(yi)(yi)影(ying)(ying)響(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)正(zheng)常運(yun)行。承(cheng)(cheng)受(shou)(shou)任(ren)何方(fang)向(xiang)的(de)(de)噴(pen)水(shui)(shui)應(ying)(ying)無有(you)害(hai)影(ying)(ying)響(xiang)。IP56:能(neng)防(fang)止(zhi)觸及或(huo)(huo)接(jie)近殼內帶(dai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)或(huo)(huo)轉(zhuan)動部(bu)件 雖(sui)(sui)不(bu)(bu)能(neng)完(wan)全(quan)防(fang)止(zhi)灰塵(chen)(chen)(chen)進(jin)(jin)(jin)(jin)(jin)入(ru)，但進(jin)(jin)(jin)(jin)(jin)塵(chen)(chen)(chen)量(liang)(liang)不(bu)(bu)足以(yi)(yi)影(ying)(ying)響(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)正(zheng)常運(yun)行。承(cheng)(cheng)受(shou)(shou)猛烈(lie)的(de)(de)海浪沖擊(ji)或(huo)(huo)強烈(lie)噴(pen)水(shui)(shui)時(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)進(jin)(jin)(jin)(jin)(jin)水(shui)(shui)量(liang)(liang)應(ying)(ying)不(bu)(bu)達(da)到(dao)有(you)害(hai)的(de)(de)程度。IP65：完(wan)全(quan)防(fang)止(zhi)塵(chen)(chen)(chen)埃(ai)進(jin)(jin)(jin)(jin)(jin)入(ru)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)。承(cheng)(cheng)受(shou)(shou)任(ren)何方(fang)向(xiang)的(de)(de)濺(jian)水(shui)(shui)應(ying)(ying)無有(you)害(hai)影(ying)(ying)響(xiang)。IP66:完(wan)全(quan)防(fang)止(zhi)塵(chen)(chen)(chen)埃(ai)進(jin)(jin)(jin)(jin)(jin)入(ru)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)。承(cheng)(cheng)受(shou)(shou)猛烈(lie)的(de)(de)海浪沖擊(ji)或(huo)(huo)強烈(lie)噴(pen)水(shui)(shui)時(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)進(jin)(jin)(jin)(jin)(jin)水(shui)(shui)量(liang)(liang)應(ying)(ying)不(bu)(bu)達(da)到(dao)有(you)害(hai)的(de)(de)程度。IP67：完(wan)全(quan)防(fang)止(zhi)塵(chen)(chen)(chen)埃(ai)進(jin)(jin)(jin)(jin)(jin)入(ru)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)浸(jin)入(ru)規定壓力的(de)(de)水(shui)(shui)中，經規定時(shi)間后，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)的(de)(de)進(jin)(jin)(jin)(jin)(jin)水(shui)(shui)量(liang)(liang)應(ying)(ying)不(bu)(bu)達(da)到(dao)有(you)害(hai)的(de)(de)程度。江蘇ABB防(fang)爆電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)能(neng)效(xiao)東(dong)元(yuan)低壓電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)(ji)符合IEC、CNS、GB、UL、CSA等國際能(neng)效(xiao)與防(fang)爆相關認證。

PTC是(shi)(shi)(shi)Positive Temperature Coefficient 的(de)縮(suo)寫，意思是(shi)(shi)(shi)正(zheng)的(de)溫(wen)(wen)(wen)度(du)(du)系(xi)數， 泛(fan)指(zhi)正(zheng)溫(wen)(wen)(wen)度(du)(du)系(xi)數很(hen)大的(de)半導(dao)體材料或(huo)元器件。通常我們提(ti)到的(de)PTC是(shi)(shi)(shi)指(zhi)正(zheng)溫(wen)(wen)(wen)度(du)(du)系(xi)數熱(re)敏(min)電(dian)阻(zu)，簡稱PTC熱(re)敏(min)電(dian)阻(zu)。PTC熱(re)敏(min)電(dian)阻(zu)是(shi)(shi)(shi)一種典型具有(you)溫(wen)(wen)(wen)度(du)(du)敏(min)感性的(de)半導(dao)體電(dian)阻(zu)，超(chao)過一定的(de)溫(wen)(wen)(wen)度(du)(du)（居里溫(wen)(wen)(wen)度(du)(du)）時，它(ta)(ta)的(de)電(dian)阻(zu)值隨著溫(wen)(wen)(wen)度(du)(du)的(de)升高(gao)呈階躍性的(de)增高(gao)。使用時，將其串(chuan)接在電(dian)路(lu)中(zhong)，在正(zheng)常情(qing)況下，其阻(zu)值很(hen)小，損耗也很(hen)小，不(bu)影響(xiang)電(dian)路(lu)正(zheng)常工作(zuo)；但若有(you)過流（如短(duan)路(lu)）發生，其溫(wen)(wen)(wen)度(du)(du)升高(gao)，它(ta)(ta)的(de)阻(zu)值隨之急劇升高(gao)，達到限制電(dian)流的(de)作(zuo)用，避免損壞(huai)電(dian)路(lu)中(zhong)的(de)元器件。

NEMA美標標準(zhun)的(de)(de)電(dian)機(ji)防(fang)(fang)護(hu)(hu)等(deng)級NEMA 1：室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)止(zhi)掉(diao)(diao)落的(de)(de)灰(hui)(hui)塵(chen)(chen)。NEMA 2：室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)止(zhi)掉(diao)(diao)落的(de)(de)灰(hui)(hui)塵(chen)(chen)和水(shui)(shui)(shui)滴。NEMA 3：室(shi)外(wai)安裝(zhuang)，防(fang)(fang)雨(yu)、雪雨(yu)和灰(hui)(hui)塵(chen)(chen)；另外(wai)增加(jia)(jia)防(fang)(fang)止(zhi)機(ji)械(xie)上(shang)結(jie)冰造(zao)成的(de)(de)傷(shang)害的(de)(de)保(bao)護(hu)(hu)。NEMA 3R：室(shi)外(wai)安裝(zhuang)，防(fang)(fang)雨(yu)、雪雨(yu)；另外(wai)增加(jia)(jia)防(fang)(fang)止(zhi)機(ji)械(xie)上(shang)結(jie)冰造(zao)成的(de)(de)傷(shang)害的(de)(de)保(bao)護(hu)(hu)。NEMA 3S：室(shi)外(wai)或(huo)室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)雨(yu)、雪雨(yu)和灰(hui)(hui)塵(chen)(chen)；確(que)保(bao)結(jie)冰時的(de)(de)外(wai)部(bu)連(lian)轉機(ji)制(zhi)正(zheng)常工(gong)作(zuo)。NEMA4：室(shi)外(wai)或(huo)者室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)灰(hui)(hui)塵(chen)(chen)、防(fang)(fang)雨(yu)、濺水(shui)(shui)(shui)、水(shui)(shui)(shui)管噴水(shui)(shui)(shui)及外(wai)部(bu)結(jie)冰損害。NEMA4X：室(shi)外(wai)或(huo)者室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)腐蝕(shi)、塵(chen)(chen)土、雨(yu)水(shui)(shui)(shui)、濺水(shui)(shui)(shui)、水(shui)(shui)(shui)管噴水(shui)(shui)(shui)及外(wai)部(bu)結(jie)冰損害。NEMA5: 室(shi)內(nei)(nei)安裝(zhuang)，防(fang)(fang)掉(diao)(diao)落的(de)(de)灰(hui)(hui)塵(chen)(chen)。隔離(li)塵(chen)(chen)土及非(fei)腐蝕(shi)性液體。NEMA于IP兩種(zhong)外(wai)殼防(fang)(fang)水(shui)(shui)(shui)防(fang)(fang)塵(chen)(chen)的(de)(de)標準(zhun)分類規則(ze)不(bu)同(tong)(tong)、測試方(fang)法也(ye)不(bu)同(tong)(tong)，所以不(bu)能(neng)直接對應。NEMA美標標準(zhun)的(de)(de)電(dian)機(ji)防(fang)(fang)護(hu)(hu)等(deng)級是什(shen)么？

電(dian)(dian)機(ji)(ji)的(de)(de)(de)機(ji)(ji)座(zuo)號(hao)：一般是(shi)指(zhi)電(dian)(dian)機(ji)(ji)中心(xin)的(de)(de)(de)高（表示(shi)電(dian)(dian)機(ji)(ji)軸(zhou)(zhou)心(xin)到地(di)(di)(di)腳(jiao)的(de)(de)(de)距(ju)離(li)）。而電(dian)(dian)機(ji)(ji)座(zuo)號(hao)中的(de)(de)(de)S，M，L是(shi)指(zhi)機(ji)(ji)殼的(de)(de)(de)長度（表示(shi)電(dian)(dian)機(ji)(ji)軸(zhou)(zhou)地(di)(di)(di)腳(jiao)孔的(de)(de)(de)距(ju)離(li)）。不同(tong)中心(xin)高下(xia)，即使(shi)代(dai)號(hao)相同(tong)它(ta)**的(de)(de)(de)孔距(ju)也不相同(tong)。電(dian)(dian)機(ji)(ji)常見(jian)安裝方式：B3（有(you)(you)地(di)(di)(di)腳(jiao)無(wu)(wu)法蘭，地(di)(di)(di)腳(jiao)貼(tie)(tie)地(di)(di)(di)，軸(zhou)(zhou)是(shi)水平(ping)），B5（有(you)(you)法蘭無(wu)(wu)地(di)(di)(di)腳(jiao)，軸(zhou)(zhou)水平(ping)），B35（有(you)(you)地(di)(di)(di)腳(jiao)有(you)(you)法蘭，地(di)(di)(di)腳(jiao)貼(tie)(tie)地(di)(di)(di)，軸(zhou)(zhou)水平(ping)），V5（有(you)(you)地(di)(di)(di)腳(jiao)無(wu)(wu)法蘭，軸(zhou)(zhou)垂直，軸(zhou)(zhou)端(duan)(duan)向(xiang)下(xia)地(di)(di)(di)腳(jiao)貼(tie)(tie)墻壁），V6（有(you)(you)地(di)(di)(di)腳(jiao)無(wu)(wu)法蘭，軸(zhou)(zhou)垂直，軸(zhou)(zhou)端(duan)(duan)向(xiang)上地(di)(di)(di)腳(jiao)貼(tie)(tie)墻壁），V1（有(you)(you)法蘭無(wu)(wu)地(di)(di)(di)腳(jiao)，軸(zhou)(zhou)垂直，軸(zhou)(zhou)端(duan)(duan)向(xiang)下(xia)），V3（有(you)(you)法蘭無(wu)(wu)地(di)(di)(di)腳(jiao)，軸(zhou)(zhou)垂直，軸(zhou)(zhou)端(duan)(duan)向(xiang)上），B14（有(you)(you)C法蘭無(wu)(wu)地(di)(di)(di)腳(jiao)，水平(ping)軸(zhou)(zhou)）TECO東元變(bian)頻器的(de)(de)(de)優點是(shi)什(shen)么(me)？安徽制動防爆(bao)電(dian)(dian)機(ji)(ji)生產廠家

電(dian)動機(ji)熱保護(hu)器的作用和含(han)義是(shi)什么？江蘇(su)WEG防爆電(dian)機(ji)生產廠家(jia)

電(dian)(dian)(dian)機效(xiao)率(lv)(lv)(lv)(lv)：η=輸(shu)(shu)出功(gong)(gong)率(lv)(lv)(lv)(lv)/輸(shu)(shu)入(ru)功(gong)(gong)率(lv)(lv)(lv)(lv)=輸(shu)(shu)出功(gong)(gong)率(lv)(lv)(lv)(lv)/（輸(shu)(shu)出功(gong)(gong)率(lv)(lv)(lv)(lv)+損失(shi)功(gong)(gong)率(lv)(lv)(lv)(lv)）*100%。一(yi)般所謂(wei)的(de)電(dian)(dian)(dian)機效(xiao)率(lv)(lv)(lv)(lv)是指滿載(zai)效(xiao)率(lv)(lv)(lv)(lv)。電(dian)(dian)(dian)機功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)數(shu)：PF=輸(shu)(shu)入(ru)功(gong)(gong)率(lv)(lv)(lv)(lv)/視在(zai)(zai)功(gong)(gong)率(lv)(lv)(lv)(lv)=KW/KVA*100%。一(yi)般所謂(wei)的(de)電(dian)(dian)(dian)機功(gong)(gong)因(yin)是指滿載(zai)功(gong)(gong)率(lv)(lv)(lv)(lv)因(yin)數(shu)。電(dian)(dian)(dian)機轉(zhuan)(zhuan)差率(lv)(lv)(lv)(lv)S：異步電(dian)(dian)(dian)機額定轉(zhuan)(zhuan)速（滿載(zai)轉(zhuan)(zhuan)速）與(yu)同步轉(zhuan)(zhuan)速之差對同步轉(zhuan)(zhuan)速之比(bi)。電(dian)(dian)(dian)機極(ji)(ji)(ji)數(shu)：即(ji)是N極(ji)(ji)(ji)，S極(ji)(ji)(ji)的(de)數(shu)量(liang)。電(dian)(dian)(dian)動(dong)機借電(dian)(dian)(dian)磁感應作用(yong)將電(dian)(dian)(dian)能轉(zhuan)(zhuan)化(hua)成機械能而(er)產生(sheng)(sheng)動(dong)力，而(er)磁性的(de)特點之一(yi)為北(bei)極(ji)(ji)(ji)（N極(ji)(ji)(ji)，正極(ji)(ji)(ji)）與(yu)南(nan)極(ji)(ji)(ji)（S極(ji)(ji)(ji)，負極(ji)(ji)(ji)）同時存(cun)在(zai)(zai)，無(wu)法分開。電(dian)(dian)(dian)機極(ji)(ji)(ji)數(shu)即(ji)是N、S極(ji)(ji)(ji)的(de)數(shu)目，故只有偶數(shu)無(wu)基數(shu)。如2、4、6、8等。江蘇WEG防爆電(dian)(dian)(dian)機生(sheng)(sheng)產廠家

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