BENTLYNEVADA125840-01/146031-01/128229-01BENTLYNEVADA125840-01/146031-01/128229-01BENTLYNEVADA125840-01/146031-01/128229-01电动机正常运行时温升稳定，并在规定的温升允许范围内。如果温升过高，或与在同样工作条件下的同类电动机相比，温度明显偏高，就应视为故障了。电动机运行时温升过高，不仅使用寿命缩短，严重时还会造成火灾。电动机过热往往是电动机故障的综合表现，也是造成电动机损坏的主要原因。电动机过热，首先要寻找热源，即是由哪一部件的发热造成的，进而找出引起这些部件过热的原因。如发现电动机温升过高，应立即停机处理。温升过高的原因如下：1、负载过大。若拖动机械传动带太紧和转轴运转不灵活，可造成电动机长期过载运行。这时应会问机械维修人员适当放松传动带，拆开检查机械设备位转轴灵活，并设法调整负载，使电动机保持在额定负载状态下运行。2、工作环境恶劣。如电动机在阳光下曝晒，环境温度超过40℃，或在通风不畅的环境条件下运行，会引起电动机温升道高。可搭简易凉棚遮荫或用鼓风机、风扇吹风，更应注意清除电动机本身通风道的油污及灰尘，以改善冷却条件。3、电源电压过高或过低。电动机在电源电压变动-5％—+10％范围内运行时，可保持额定功率不变。若电源电压超过额定电压的10％，会引起铁心磁通密度急剧增加，使铁损增大而导致电动机过热。具体检查方法是，用交流电压表测量母线电压或电动机的端电压，若是电网电压原因，应向供电部门反映解决；若是电路压降过大，应更换较大截面积的导线和缩短电动机与电源的距离。4、电源断相。若电源断相，使电动机单相运行，短时间就会造成电动机的绕组急剧发热而导致烧毁。因此，应先检查电动机的熔断器和开关状况，然后用万用表测量前部线路。5、由于笼型转子导条断裂、开焊或转子导条截面积太小，使损耗增加而发热，可在停机后测试转子温度，查找故障原因并予以排除。6、电动机起动频繁或正反转次数过多，应限制起动次数，正确选用过热保护或更换适合生产要求的电动机。7、三相电压严重不平衡，应检查定子绕组相间或匝间短路及定子绕组接地情况。8、轴承润滑不良或卡件，应检查轴承室的温度是否高于其他部位；检查润滑脂是否太少或干枯。9、通风系统发生故障，是因风路堵塞或散热片积灰太多、油垢太厚而影响散热。10、转子与定子铁心相接，产生连续的金属撞击声，会引起局部温升过高，应抽心检查，找出故障原因进行排除。11、采用轴流式风扇的电动机，若风扇旋转方向反了，也会造成电动机过热。12、传动装置友生故障(摩擦或卡涩现象)，引起电动机过电流发热，甚至使电动机卡住不造成电动机温度急剧上升，绕组很快被烧坏。13、重绕的电动机由于绕组参数变化，将会造成电动机在试运行时发热，可测量电动机的三相空载电流，若三相空载电流大于额定值，说明匝数不足，应增加匝数。14、外部接线错误，△联结的电动机误接成丫联结。虽然可以起动并带负载运行，但负载稍大电流就会超过额定电流引起发热；荐丫联结电动机误接成△联结，空载时即可超过额定电流而无法运行1756-L61B1756L55M246EW1810-3AAA02B-0236-C203A06B-6079-H203A06B-6087-H126A06B-6096-H101PCIHIF68IMASI23IMFEC12INNIS21INNNPM22F3PU20-ONF3SP53-4SIC693ALG223ZW-102PMELU29ROF1375339/11MVI56-MCMRIBSPCISC/I-T6GF1-710-3AA6FX1132-8BB01M1400-0024119IBSPCISC/I-T1784-U2DHP6DR5020-0EG01-0AA0IC693PWR32199-000018-01HC-KFS43VRDM3910/50LWC140CRA93100HNF363RPHCBRCMVI56-MCMRIC670ALG3101784-U2DHPMVME162PA-252SEVME-BRIDGE1756-L61A06B-0147-B075A06B-0153-B075140CPU43412A3HAC025562-001/053HAC025784-001/100DSQC6513HAC025917-001/00DSQC6523HAC025918-001/00DSQC6533HAC028357-0013HAC029105-0013HAC029157-001/04DSQC6093HAC14178-1DSQC6433HAC024488-001/01DSQC6613HAC026253-001DSQC6623HAC026254-001/10ADSQC6633HAC029818-001/05DSQC6683HAC029157-001/04DSQC6693HAC026780-001/03DSQC6793HAC028357-0011769-L35E2711PC-T6C20DFVUS011-NA6DR2100-5IC693CMM3216ES7392-1AN00-0AA06ES7392-4BC50-0AA0A03B-0808-C0206AV6545-0CC10-0AXO停产6AV6643-0CD01-1AX1替代6AV6545-0CC10-0AX0A16B-3200-01701756-ENBT3HAA3563-AUA/1140CPS11420DPI832DPI880DMC-14141794-IF4IBRC400IMASI23IMFEC12INNIS21INNNPM223HNE00314-10-51378-193HNE00314-1ASSY810-17031-4LAM940016167-1-0916169-1-0739SAMCAN39SDM024DCCBNA06B-6093-H1016SE9531-0DK406TF-5CXFL521B6AR1302-0AC00-0AA0A16B-3200-0362140CPU43412APSSSBDI808301140MDV60A0055-5A3-4-002980078-01MVME13364-W5001B01CM063-LE-507E3756GK1541-1AA006GK1541-2BA006SC6112-0AA00140CPU43412A07KT51PFTL101A-1.0KN6ES7315-2EH14-0AB06ES7331-7KF02-0AB06ES7390-1AB60-0AA06ES7953-8LF20-0AA0CAIMR-F7B4015CAIMR-F7B4037CAIMR-F7B4175CAIMR-F7B42727702PAT:8070-0102-05PK60-IIICEIS215UCVEH2AIS215UCVEM06A6ES5103-8MA027561SSI1756-A71756-BA11756-CNB1756-CNBR1756-L55M131756-PA721756-SRMXMVE-202XMVE-2033BSE003387R13BSE003390R1SA1676ES5095-8MB026ES5928-3UB126FC5111-0CA03-0AA2A4982-66502EWS600-24LMPLANFL100X/0.80BD6BK1700-2BA00-0AA01747-L5526GK1502-3CB101756-BA11756-IB321756-IF161756-OB321756-OF8CP5614EA150-30014CIMR-VB4A0007BBA1784-PCICNC6108UFX7110CISCOASA5540CISCO2951ME-C6524GT-8SJZRCR-NPP01B-16ES5103-8MA036ES7307-1KA02-0AA06ES7331-7KB02-0AB06ES7331-7KF02-0AB06SE6400-2FA00-6AD0140CPS11420140CPU65150140CRP93200140CPU11302FBM211ZCP2701761-L32BWA1747-ASB1747-L5421747-SN6FC5210-0DF21-2AA0A06B-6120-H04531C008-503-4-00PI-64(98)E31C008-503-4-001391B-AA45FBM2241756-IB161756-IF161756-IF81756-IM16I1756-IR6I1756-OB161756-OF8HE693THM166MFDDTB3A2DFT90L4/BMGR47-DT90L430083503E3604E3700A3805E140ACI03000140CPS11420140CPU43412A140DAI75300140DAO84210140NOE77101REN23-3WCES-A-C5E-01XFL521B140CPS11420140CPU65150140CRA93200140CRP93200IC693CMM321-JJBMXAMI0410BMXCPS2010BMXDDI3202KBMXDDO1602BMXP342020BMXXBP0800LWV000FLUKEHARTSCIENTIFIC15602562PE6A90D300/3S2266AHA-2940W/2940UWEP5XX-HPNU-23K01-PV9DA-4ZSNAP-AITM-2SNAP-AIV-IJAMSC-B2743VJAMSC-B2914JRMSP-PS601B30035H011C31129G03/1C31132G011C31219G011C31227G01/1C31224G011C31234G01/1C31238H015X00119G015X00121G0130083503E3604E3700A3805ETRICONE6ES7414-2XK05-0AB0B0598847/100CP1E-N60DT-ADMC-1414IC694ALG221IC694MDL660IC695PSD040F140CPS11420140CPU67160140NOE77101M1000E8XM610E5620MARPOSSE9034140ACI03000140ACO02000140CPS11420140CRA93100140DDI35300140DDO35300140XBP01000UT529CIC698ACC701PC2-3200R-333-12C3A06B-0127-B675#7000A16B-3200-0042140NOE77100E44549FC-9801FDSSR1221336-BDB-SP4D1336-BDB-SP5DR2D190-AA04-19(M2D068-BF)1756-CNB1786-RPA1786-RPFMJEPMC-IO220JEPMC-MB200BEY801P-FBM-051756-OW16I1746-N21746-NI81747-L5511747-L5521747-L5531756-A101756-CP31756-ENBT1756-PA751786-BNC1786-XTFSP400-246FM1723-3BA106FC5510-0BA00-0AA06FC5511-0CA00-0AA0VAP016-APCI-9111DG3-9010.121TSXDMZ28DR2S700-555140NOE77100R2D190-AA04-19(M2D068-BF)6RA7085-6DS22-0EVS9325-EP140ARI03010140CPS21400140XBE10000140XBP00600140XCA71703140XCP51000140XTS00200TSXP57203MCIMR-P7U25P516ES5430-4UA116ES5451-4UA146ES5465-4UA116ES5470-4UB116ES5928-3UA11A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