5761806-0D
ABBSNAT602TAC/5761806-0DABBSNAT602TAC/5761806-0DABBSNAT602TAC/5761806-0D专业提供:PLC可编程控制系统,分散控制系统(DCS)安全仪表系统(SIS),ESD系统,振动监测系统,汽轮机控制压缩机组控制系统(CCS)等各类工控系统部件系统里的PLC模块,DCS模块,CPU模块,IO模块,DO模块,AI模块,DI模块,网络通信模块,以太网模块,运动控制模块,模拟量输入模块,模拟量输出模块,数字输入模块,数字输出模块,冗余模块,电源模块,继电器输出模块,继电器输入模块,处理器模块市面上有很多关于变频器维修书籍中认为,通用电动机频率上限为55Hz。这是因为当电动机转速需要调到额定转速以上运行时,定子频率将增加到高于额定频率(50Hz)。这时,若仍按恒转矩原则控制,则定子电压将升高超过额定电压。那么,当调速范围高于额定转速时,须保持定子电压为额定电压不变。这时,随着转速/频率的上升,磁通将减少,因此在同一定子电流下的转矩将减小,机械特性变软,电动机的过载能力大幅度减少。由此可见,通用电动机频率上限为55Hz是有前提条件的:1、定子电压不能超过额定电压;2、电动机在额定功率运行;3、恒转矩负载。上述情况下,理论和试验证明,若频率超过55Hz,将使电动机转矩变小,机械特性变软,过载能力下降,铁耗急增,发热严重。电动机实际运行状况表明,通用电动机可以通过变频调速器进行提速运行。能否变频提速?能提多少?主要是由电动机拖动的负载来决定的。首先,要弄清负荷率是多少?其次,要搞清楚负载特性,根据负载的具体情况,进行推算。简单分析如下:1、事实上,对于380V通用电动机,定子电压超过额定电压10%长期运行是可以的,对电动机绝缘及寿命没有影响。定子电压提高,转矩显著增大,定子电流减少,绕组温度下降。2、电动机负荷率通常为50%~60%一般情况下,工业用电动机通常在50%~60%额定功率下工作。经推算,电动机输出功率为70%额定功率,定子电压提高7%时,定子电流下降26.4%,此时,即使是恒转矩控制,采用变频调速器提高电动机转速20%,定子电流也不但不会上升,反而会下降。尽管提高频率后,电动机铁耗急增,但由其产生的热量与定子电流下降而减少的热量相比甚微。因此,电动机绕组温度也将明显下降。3、负载特性各种各样电动机拖动系统是为负载服务的,不同的负载,机械特性不同。电动机在提速后必须满足负载机械特性的要求。经推算恒转矩负载不同负荷率(k)时的允许最高运行频率(fmax)与负荷率成反比,即fmax=fe/k,其中fe为额定工频。对恒功率负载,通用电动机的允许最高工作频率主要受电动机转子和转轴的机械强度限制,笔者认为一般限制在100Hz以内为宜。1746-OW16:A02B-0259-B5016SN1145-1BA01-0BA2SONBTY801P-FBCAI810AO810V2CI840DI810DO810DO815EI803FEI813FFI820FRLM01SA801FSA811FSD802FSD822TU810V1TU8471762-IF2OF21762-OW16PS10-2T2-DD1-AD3IC660BBA020KJ3001X1-CA1KJ3002X1-BC1CIMR-M5N2015A02B-0228-B502A06B-6102-H245#H520ASX-16CATS48C11QATS48C14QPD63F160FOS79800D-00083480A83485A86100A86103A86105A86105C-OPT200DPS-250AB-47A3503ELC82*8MAC2VM1MVME167PA-34SEHDS02.2-W040N-HS32-01-FW3700A6ES7633-2BF02-0AE31C31132G011C31129G041756-0W161756-DNB1756-IB321756-L61CAT-140-MN-10006EP1436-1SH01升级替代型号6EP1436-3BA00DC24V20A0810140ACI04000140ACO13000140CPS11420140CPU53414B140CRA93100140CRP93100140DDI35300140DDO35300140NOE77101140XBP01600CHDQB50-75DMEV2000-4T0150PEV2000-4T0220PMDD112D-N030-N2M-130GA0ACS800-01-0020-3ACS800-01-0025-3ACS800-01-0060-3ACS800-01-0070-3ACS800-01-0100-3ACS800-01-0120-33V41503V4160140CHS11000140CPS11100140CPS11420140CPS12420140CPU43412A140CRA93200140CRP93200140DDI35300140DDI84100140DRA84000140NOE771011203-CN11746-A101746IM161746OW161747-L5421756L551756-BA21756-IF161756-OB16I1756OB321756-OF81761-L20BWA-5A2711P-T6C20D140CRA93200140CRP93200MDD112D-N-030-N2M-130GB0OKYM6W21A20B-3900-0042140ACI04000140ACO13000DPR250A20B-3900-0042140CPU11303490NRP95400GMI-S13AO810MT4414TMT4424TEV2000-4T0150PEV2000-4T0220P140DDI35300140DDO35300140NOE77110ES506ES7331-7RD00-0AB0ADVANTAG91006NH9720-3AA00A03B-0819-C161WH5-2FFL5201-2-0231C015-503-4MM05C-503-00MVME5500-0161ARTMO-250VE2T8PCNDSAI130DDSAO120ADSBC176SGMAH-01AAA21IC697MDL740EADAM-5017ADAM-5050ADAM-5510140CRA931001756L55M223503E3700AMPL-A320H-HJ22AADKCXX.3-100-7PS4-201-MM1E4809-770-069AMVME167PA-34SEHE100S6FX1115-0AA026FX1123-7AA026FX1125-1AA016FC3988-7AF011756-OW16I1756-TBCH/ACACR-IR151515EBSDCSPOW-1PSSICPU302060PSSIDI20T302112PSSIDIOZ302108PSSIPS24302051C7012A12021326AB-B420E-M2L1747-CP3(USB)1747-CP3(串口)1747-L542IC693PBM200140DD035300140DDI35300140NOE77110TSXCTY4ATSXPBY100XBT-F034610PS-M06D12S5-NJ1L(S)A06B-0126-B5776ES7331-7KF02-OABO6ES7332-5HD01-OABO1756-CN21756-EWEB1756-IB321756-L631756-OF81756-OV32E972-0DP10MC-4/11/10/4001756-CNB1756-CNBR1756-ENBT1756-IF81756-IM16I1756-L631756-OF41756-OF81756-OW16I1756-PA721756-PA751756-TBCH1756-TBNH1757-SRMLOGO-230RC1746-IM161746-OW161746-P21747-L5411756-BA11756-IB321756-L55M131756-OB321756-PA72/C6ES7307-1EA00-0AAO6ES7315-2AF03-0AB06ES7317-2AJ10-0AB06ES7321-1BL00-0AA06ES7322-1BH02--0AA06ES7322-1BL00-0AA06ES7322-1HH01--0AA06ES7331-7KB02-0AB06ES7331-7KF02-0AB06ES7332-5HD01-0AB06ES7953-8LL00-0AA06ES7971-1AA00-0AA06SE7216-2BD23-OXB0VLT2822PT4B20SBR1DBF10A00C0OP-620621-6575ES1-112-7MTA03B-0801-C054A03B-0807-C161A06B-6114-H208A16B-1212-022A16B-2200-035A16B-2200-036A20B-2000-01702094-BC02-M02-S872C-D3NP12-D4PSR4/5A-2503TK2804-0BB43TK2907-0BB41746-NO8I1770-XYC1771-A2B1771-CD1771-P71794-ASB1794-IM81794-OM81794-TBNOP-620INNIS21INNPM12K-TFT-AN-CCFTFERE100SGDH-04AE140ACI04000140ACO02000140DDI35300140DDO35300140NOE77101N4010AR3767CGM2QA100L4B140ARI03010DDI-35300DDO-35300XB2-BVM3LCFX2N-4DA1746-IB161746-NI81746-NIO4I1746-OA161746-P41747-L5321756-CNBR440R-S35001SCXI-1000SCXI-1166SCXI-1327SCXI-1600DSO6012AA06B-6050-H050BC635PCI3A0350.6DSTC176KL1002KL2012A16B-1212-0210A16B-1212-0220A16B-2200-0350A16B-2200-0361A20B-2000-01703CP260。60-16468-2-061-001756-DNBTC-PRS021GP37W2-BG41HE693THM6651756-CNB/D1756-OW16I1756-TBCH/A140NOE77101PPC-105T1756-RM1756-RMC101786-RG61786-TPS1786-XTA06B-0075-B003FXM5-110A-20A602453-59AA06B-0075-B0033BSC610038R1SD8223BSC610039R1SD823KPC2004HDD,SHOCK-RESISTANTVER,ASSYUSB-STICK4GB5X00226G01EVS9325-ESEVS9327-ESEVS9328-ESL3MF-032/64GFOKS-G序列号S/N:11851FRN7.5P11S-4CXAS-B824-0161784PKTX6SN1123-1AB00-0BA2E6CP-AG5C2562MMCS40A0022-5A3-4-00140ACI03000140ACO0200043AP-FA45C/PB-BA1FK7081-5AZ91-1ZZ9-ZS042.5KW1FK7100-5AZ91-1ZZ9-ZS053.2KW1FK7101-5AZ91-1ZZ9-ZS074.2KW8.5AKPS-600/20-ESCKSD1-16KSD1-48开关电源1756-CNB1756-TBCH/A6AV6642-0AA11-0AX1140NOE77100ATV312H075N4ATV31H0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