ABBBAILEYIMDSO14、INSEM111、变频器的载波频率可以改变，但是我不推荐你随便去改这个参数。2、为了减小噪声，可以将变频器的载波频率适当设置得高些，但这时又会带来一些问题，如果载波频率调得太高，又会对其它设备造成干扰，尤其是当采用PLC通讯方式时。因此要根据现场的实际情况设置载波频率。3、如果不是非常有经验的工程师，建议不要改动载波频率这个参数。4、MM440变频器的载波频率参数是P1800。MM440变频器载波频率参数是P1800。P1800——设定变频器功率开关的调制脉冲频率。这一脉冲频率每级可改变2kHz。***低的脉冲频率取决于P1082（***大频率）和P0310（电动机的额定频率）。电动机频率的***大值（P1082）限定为脉冲调制频率P1800。当变频器散热器的温度（P0614）超过了报警电平，将使调制脉冲的开关频率降低和/或输出频率降低。如果增加脉冲调制频率，变频器的***大电流（r0209）可能要降低（降容）。降容特性决定于变频器的型号和功率大小。如果变频器运行时并不要求***地安静，可选用较低的调制脉冲频率，这将有利于减少变频器的损耗和降低射频干扰发射的强度。在一定的环境条件下，可以减少变频器的开关频率，为变频器提供过温保护，保证设备不致因过温而损坏。但是，按理论上来说载波频率是越高越好，因为这样逆变出来的波形越接近正弦波。同时，调整变频器的载波频率可降低机器的噪音，但是，并不是说可以消除干扰，只是可以降低机器震动的噪音。而且，降低载波频率会引起谐波的增加，所以说实际上干扰会更严重，对电机没有什么好处。总的来说，降低载波频率会引起谐波分量增加，这是不好的现象，好处是有可能降低机器震动产生的噪音。建议不要乱动这个值！5、6SE70变频器的载波频率参数是P340。SIEMENS3TF4222-OA58V*USED*BAUMERELECTRICIFR12.24.15/L*USED*LIEBERTPSA350MT-120*USED*UHLMANN0.64.814*USED*GENERALCAPACITORZ97F9082*USED*FEDERALPIONEER30-100HA*USED*T1689UEC0703NSOR*USED*PULSOTRONIC9954-2200*USED*LOTOF2SPEEDAIREGW072*USED*FARMERELECTRICTR5-14*USED*MITSUBHISHIA1S38B*USED*TEXASINSTRUMENTS500-2108I/OCHANNELCONTROLLER*USED...LOTOF3TEXASINSTRUMENTS500-5001*USED*PHILLIPSSAEJ560RECEPT***E*NEWINABOX*ZIPLINKD2-DSCBL-2*USED*PARKER12F24C2148AF*USED*FOXBORO0-15PSI*USED*ALLENBRADLEY1794-ADNSER.BADAPTER*USED*GENERALELECTRICCAPACITORZ97F9069*USED*GENERALELECTRICCAPACITOR97F6084*USED*THENATIONALACMECO.D900-1A*USED*HONEYWELLMP953C10182*USED*DORMEYERINDUSTRIES75121-0014*USED*KRAUS&NAIMERKG41B*USED*SPECTRUMCONTROLS8000RDI-016REV.D1*USED*CUTLERHAMMERBREAKERWMS2C01*USED*DANAHER5707571*USED*GENERALELECTRICCAPACITORZ97F6622*USED*PRECISIONMULTIPLECONTROLSA1068*USED*RELIANCE45C69OUTPUTMODULE*USED*ANTUNESCONTROLS8021206021*ASIS*POWER-ONEPOWERSUPPLYHB24-1.2-A*ASIS*STELPRON2T1-6-W*USED*STEWART-WARNER20028-17MINIMETER120VAC*USED*ISHIDAP-5292PCBOARDWITHCONNECTORS*USED*1RS485COMMUNICATI***BOARD*USED*GE97F5705CAPACITOR*USED*MACVALVE111B-501JC*USED*MODICONAS-B827-032*USED*TPCWIRE&CABLE69596*USED*TPCWIRE&CABLE69412*USED*SELECTRONHRS440D30*USED*MUFFINMU2S1FAN*NICE*HOLJERONMBK-DIG144*ASIS*NAGANOKEIKICO.LTD.G30239*USED*PANASONICELECTRICMAC-I*USED*BOSCH0830100358*USED*TAIYOSR201*USED*TEXASINSTRUMENTS6MT11-A05L*USED*SPAREPARTSOLUTI***3-1063-B*USED*KEYENCEFU-42*NICE*AMPROBEINSTRUMENTSRBT-8100-150DEGREEF*USED*MECHATRONICSE9225M24B*USED*BASLERELECTRIC001106A*USED*SCHMERSALAZ17-11ZKSAFETYSWITCH*NEWINABOX*DWYER475-***-KIT*NEWNOBOX*BOSCH0811405535*NEWINBOX*DURANT7-Y-1-3-RMF-PMELECTRICCOUNTER24VDC*USED****CAL20-02-CSOLENOIDVALVE*NEWOUTOFABOX*38A6871Z012GANALONGGASPWBASSY*USED*RELIANCEELECTRIC1MI4000REMOTEMETERINTERFACEKIT*U...PRO-LOGPWB111469-003TTLI/OCARD*USED*OHMITERESISTORD100K1K0E*NEWINBOX*NORGRENF74H-4AD-AD0*USED*ALLENBRADLEY1492-CB25AMP*USED*SKAN-A-MATICP311*NEWINABOX*B&RM2NTCP63-0CPUPOWERSUPPLYW/NTCP63*USED*CHICAGO930-CPLABORATORYSINKFAUCET*NEWINABOX*ALLENBRADLEY1492-CB1G100SERIESA*USED*NH-45102HOLESEAL*NEWOUTOFABOX*BOSH1824210223*USED*TPCWIRE&CABLE84400*USED*DORMEYERPRODUCTS14-1120V*USED*ARO3/8F25B*USED*VALENITEAE-42RSXY-11T9*USED*VALENITECTFER-12-CA-3-8?T6*USED*CUTLER-HAMMERBR230*USED*0-100DCMICROAMPERES*USED*T&BPB448PANELMOUNT*USED*TPCWIRE&CABLE84306*USED*PLCDIRECTD2-09BSLOTBASERACKW/EXPANSION*USED*HOLOPHANEW4250PMVTSZGLIGHTFIXTURE*USED*BANNERMB3-4PHOTOELECTRICAMPLIFIERMODULE*USED*RUSSELLSTOLL8723-RS*USED*ORIENTALMOTOR******-ZP*USED*LOTOF2PEPPERL+FUCHSNBB2-12GM60-WO*USED*CTSCTS-10473*NEWINABOX*ALLENBRADLEY1794-TBNSER.A*USED*ASSUREDAUTOMATIONNC8BARMAXCONTROLPRESSUREVALVE*...SOLON.2SPW1D2PRESSURESWITCH*USED*LOTOF2ELECTRONICSCORPORATIONOFAMERICA42DTB-5000...***C00-00911/6X2250PSI*USED*SIEMENS6ES5734-1BD20*NEWINBOX*CUTLERHAMMERA10EN0SERIESA1*USED*BALLUFFBOSS-T01*NEWINABOX*SENCON11P-330-03*USED*NUMATICSL23BB52B000061VALVE*NEW*NKTECHNOLOGIESATR1-420-42L-FT*USED*GE97F6853RCCAPACITOR*USED*TELEMECANIQUEXCK-L*NEWOUTOFBOX*BALLUFFC04DNL7*NEWINBAG*VIKINGM05*NEWOUTOFBOX*DAYTON1A485M*NEWINABOX*DAYTON1A485M*NEWINABOX*SQUAREDPQ-3603BUSWAYSWITCH*USED*JOHNSONCONTROLP66BAB-5ELECTRONICFANSPEEDCONTROL*...DWYER1710-0PRESSURESWITCH*NEWINABAG*KNFFLODOSPML4370-FPD10*NEW*SYNCHRON3856R-6-42-94*NEWINABOX*OHMITECLU1041POTENTIOMETER*USED*DWYER1710-0PRESSURESWITCH*NEWINABAG*KNFFLODOSPML4370-FPD10*NEW*SYNCHRON3856R-6-42-94*NEWINABOX*OHMITECLU1041POTENTIOMETER*USED*SARGENTEN1431CLOSER*NEWINABOX*SEMIKRONSKKT161/16E1600V160A*USED*LOTOF5RAYCHEM301A048-3-0THERMOFITHEATSHRINKABLE...ALLENBRADLEY40146-013-60*USED*GECR120B02022120V*USED*VICKERSU131K06ARSOLENOIDVALVE*USED*HAMMONDPH250AJTRANSFORMER*USED*MERCOIDPGW-3PR.P1PRESSURESWITCH*USED*HYUANELECTRICEDS3448-5-0400-?000SENSOR*USED*AUTOMATIONDIRECTCPT115-200-FTRANSFORMER*USED*PARKER07L42BELUBRICATOR*USED*ALLENBRADLEYREMOTEADAPTER20-COMM-RSERIESA*NEWOU...PARKERK593-108115V*USED*ASCOMP-C-086*USED*BUSSFUSEHOLDERR60100-3CR*USED*ASCO216758-001D120V*USED*11/2"200WOGBRASSVALVE*USED*LOTOF4WALTHERPLUG710621690V*USED*EFECTOREVC142*USED*FESTO05024V*USED*LOTOF2NUMATICS139-330P*USED*MICROSWITCHLSZ3A*USED*MODICONAS-B828-016*USED*MICROSWITCH201LS10*USED*ASHCROFT9224-02*USED*NUMATICS11SAD4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