Ib, Cov Kev Sib Tw ntawm Electromagnetic Interference hauv Industrial Scenarios
Electromagnetic cuam tshuam nyob rau hauv kev lag luam ib puag ncig muaj cov yam ntxwv ntawm dav spectrum, siab siv, thiab txoj kev sib txuas ua ke. Piv txwv li:
Zaus converter thiab lub cev muaj zog: PWM teeb liab tso tawm los ntawm lub zaus converter muaj ib tug loj tus naj npawb ntawm high - zaus harmonics (txog MHz), uas nkag mus rau lub cev muaj zog cable los ntawm conduction coupling thiab ces cuam tshuam nrog ib puag ncig sensor teeb liab los ntawm spatial hluav taws xob;
Kev sib txuas lus muaj Ethernet: Lub sijhawm tiag tiag Ethernet raws tu qauv xws li Profinet thiab EtherCAT yog qhov nkag siab rau lub teeb liab qeeb. Yog tias M12 connector shielding tsis ua haujlwm, nws yuav ua rau muaj kev nce hauv network pob ntawv poob tus nqi thiab cuam tshuam cov cuab yeej synchronization raug;
Daim ntawv thov ntawm lub zog tshiab tsheb: Lub zog hluav taws xob hluav taws xob tsim los ntawm tus tswj lub cev muaj zog tuaj yeem cuam tshuam nrog CAN kev sib txuas lus tsheb npav, ua rau kev tswj xyuas tsheb tsis zoo.
Kev sim cov ntaub ntawv qhia tau hais tias unshielded M12 connectors muaj ib tug shielding efficiency (SE) tsuas yog 10dB ntawm ib zaus ntawm 100MHz, thaum connectors nrog ib tug 360℃tag nrho cov hlau shielding txheej thiab zoo grounding yuav ua rau kom tus nqi SE mus rau ntau tshaj 60dB thiab txhim kho kev tiv thaiv - cuam tshuam muaj peev xwm los ntawm 1000 zaug.
2, Technical hauv paus ntsiab lus thiab kev siv txoj hauv kev tiv thaiv av
1. Lub cev qauv tsim ntawm shielding txheej
Cov txheej thaiv thaiv ntawm M12 txuas feem ntau yog ua los ntawm cov khoom siv tooj liab plated tooj liab lossis stainless hlau, thiab kev tiv thaiv tag nrho yog ua tiav los ntawm cov qauv hauv qab no:
360℃crimping flange: seamlessly crimping lub cable shielding txheej nrog connector vaj tse kom tshem tawm cov teeb liab to;
Tus yuam sij tswj code shielding: Piv txwv li, tus X code connector txais ib tug ntoo khaub lig zoo li shielding tsim los cais plaub lub teeb liab khub thiab txo crosstalk;
Differential kis technology: D-code connectors xa cov ntaub ntawv los ntawm twisted khub cables, siv teeb liab voltage sib txawv los offset hom kev cuam tshuam.
Noj M12 X-Code connector los ntawm Desao Electronics ua piv txwv, nws cov ntaub thaiv npog siv tin plated tooj liab braided mesh nrog braiding ntom ntawm ntau dua 90%. Ua ke nrog 360℃crimping txheej txheem, nws tseem tuaj yeem tswj tau qhov kev tiv thaiv zoo ntawm 50dB ntawm qhov zaus ntawm 1GHz, ua tau raws li qhov yuav tsum tau ua ntawm CAT6A tus qauv.
2. Kev xaiv ntawm txoj kev hauv av
Lub tswv yim hauv av ntawm cov txheej thaiv thaiv yuav tsum tau hloov kho raws li lub teeb liab zaus, cable ntev, thiab cuam tshuam theem:
Ib qho kawg nkaus grounding: haum rau qis -frequency signals (<1MHz), such as analog sensor signals. Ground the shielding layer only at the device end to avoid introducing noise due to ground loop currents. For example, a certain automobile welding workshop used a single ended grounded M12 connector to transmit pressure sensor signals, successfully compressing the signal fluctuation range from ± 5% to ± 0.5%;
Double ended grounding: suitable for high-frequency signals (>1MHz), xws li kev lag luam Ethernet kev sib txuas lus. Ground lub shielding txheej ntawm ob qho kawg ntawm connector ib txhij, thiab siv lub rov qab magnetic teb generated los ntawm shielding txheej tam sim no los tiv thaiv sab nraud cuam tshuam. Ib qhov project photovoltaic inverter txo cov ntaub ntawv pob ntawv poob ntawm 30% mus rau 2% los ntawm ob qhov kawg grounded M12 D coding connector;
Hla hauv av: Hauv qhov ntev - txoj hlua txuas, qhov taw qhia hauv av tau teeb tsa txhua 1/10 wavelength ntev (xws li txhua 2.1 meters rau 10MHz teeb liab) kom ntseeg tau tias muaj peev xwm tiv thaiv cov txheej txheem sib npaug. Ib lub tsev khaws khoom ntse AGV siv cov txheej txheem hla av, uas txhim kho kev ruaj ntseg ntawm kev taw qhia kev taw qhia los ntawm 80%.
3, Kev ua tsis tiav hom thiab kev zam cov tswv yim ntawm kev tiv thaiv hauv av
1.Shielding txheej tawg thiab oxidation
Kev vibration thiab dabtsi yog khoov kev ntxhov siab nyob rau hauv kev lag luam scenarios yuav ua rau lub shielding txheej tawg, thaum nyob ib puag ncig ntub yuav ua rau oxidative corrosion. Piv txwv li, hauv cua ua liaj ua teb, X-code connector tau ntsib cov ntaub ntawv txawv txav los ntawm cov cua ceev sensor vim muaj txheej thaiv tiv thaiv tawg, ua rau muaj cua turbine kaw. Kev zam txim muaj xws li:
Siv crimping terminals nrog lub zog tensile ntawm Ntau dua lossis sib npaug rau 35N;
Siv PUR sheathed cables, lawv txoj kev khoov tuaj yeem ncav cuag 10 lab lub sijhawm;
Tsis tu ncua siv micro ohmmeter los ntsuas kev tiv thaiv kev tiv thaiv, nrog tus qauv tus nqi tsawg dua lossis sib npaug li 50m Ω.
2. Cov av tsis zoo thiab muaj peev xwm sib txawv
Kev tiv thaiv hauv av ntau dhau los lossis ntau qhov sib txawv hauv av tuaj yeem ua rau muaj kev cuam tshuam tam sim no hauv cov txheej txheem tiv thaiv, uas dhau los ua qhov cuam tshuam. Ib lub Hoobkas semiconductor pom tias cov av tsis kam ntawm nws cov M12 connector shielding txheej mus txog 10 Ω, ua rau hauv av muaj peev xwm sib txawv ntawm 5V ntawm cov khoom siv thiab ua rau PLC tsis ua haujlwm. Cov tshuaj muaj xws li:
Siv cov impedance grounding hlau uas tsis tshua muaj (hla-sectional cheeb tsam Ntau dua lossis sib npaug li 4mm ²);
Txais equipotential bonding (MEB) rau kev sib koom ua ke hauv av;
Tsis tu ncua kuaj cov av tiv thaiv, nrog tus qauv tus nqi tsawg dua lossis sib npaug rau 1 Ω.
3. Encoding Misinsertion thiab shielding interrupts
Kev nkag tsis raug ntawm M12 connectors nrog cov lej sib txawv tuaj yeem ua rau lub cev cuam tshuam ntawm cov txheej thaiv thaiv. Piv txwv li, sib xyaw D-code (industrial Ethernet) nrog A-code (sensor signal) connectors tuaj yeem cuam tshuam txoj kev sib kis. Kev zam txim muaj xws li:
Txais tus yuam sij tswj coding tsim los tiv thaiv lub cev tsis zoo;
Sau npe hom encoding thiab siv cov xwm txheej ntawm lub connector;
Ua raws li cov qauv kev tswj hwm nruj, xws li kev tswj hwm xim xim thiab daim ntawv cim npe.
