Cov txheej txheem teeb liab ntawm txoj kev tsheb ciav hlau xav tau kev ntseeg siab tag nrho, ua rau cov khoom siv fais fab muaj zog tseem ceeb rau kev ua haujlwm kom muaj kev nyab xeeb. Cov txheej txheem no siv ntau yam khoom siv fais fab uas tsim los rau cov haujlwm tseem ceeb thoob plaws hauv lub network.

Kev Ua Haujlwm & Cov Nta Tseem Ceeb:

1. Kev Tawm Tswv Yim Dav Dav & Kev Ua Haujlwm Zoo: SMPS tswj tau qhov hloov pauv ntawm lub zog hluav taws xob loj (AC 85V–264V). Lawv kho thiab lim AC input mus rau DC, tom qab ntawd siv high-frequency PWM switching (ntawm MOSFETs) los tsim cov pulses. Lub transformer kho qhov voltage thaum muab kev cais tawm tseem ceeb, ua rau muaj qhov tseeb, ruaj khov DC outputs (24V, 48V, 110V) ntawm >90% efficiency, txo qhov poob thiab cua sov.

2. Kev Tso Tawm Ruaj Khoov & Kev Tiv Thaiv: Ib lub voj voog tawm tswv yim (PWM IC + optocoupler) saib xyuas cov zis tas li, hloov kho kom ruaj khov (

1) Kev Tiv Thaiv Hluav Taws Xob Ntau Dhau/Qis Dua (OVP/UVP): Kev tiv thaiv tiv thaiv cov teeb meem tsis sib xws ntawm lub grid.

2) Kev Tiv Thaiv Overcurrent/Luv Circuit (OCP/SCP): Txwv tam sim no lossis kaw thaum muaj teeb meem tso zis.

3） Kev Tiv Thaiv Kub Dhau (OTP): Tiv thaiv kev phom sij ntawm cua sov.

4) Kev Tiv Thaiv Surge: Txo cov xob laim ntaus los yog hloov pauv transients.

3. Kev Rov Ua Dua & Kev Thaub Qab: Cov txheej txheem tseem ceeb (kev sib txuas, kev tswj hwm lub tsheb ciav hlau) siv "N + 1" redundant parallel SMPS nrog kev ua tsis tiav (

Daim Ntawv Thov Tseem Ceeb & Cov Chaw Fais Fab:

1. Cov Khoom Siv Ntawm Txoj Kev Khiav: Qhov no suav nrog cov khoom tseem ceeb xws li txoj kev khiav (nrhiav pom lub tsheb ciav hlau), cov cim qhia (qhia cov yam ntxwv), thiab cov tshuab taw tes (hloov). Lawv feem ntau ua haujlwm rau 24V lossis 48V DC, tau los ntawm:

1) Kev Hloov Pauv Fais Fab Hauv Zos: Lub zog hluav taws xob AC loj (feem ntau yog 110V/230V AC ib theem lossis 400V AC peb theem) raug pub rau cov chaw nyob ntawm txoj kev. Cov Chav Muab Fais Fab (PSUs)Cov PSUs no hloov AC mus rau qhov xav tau ruaj khov, tswj hwm DC, suav nrog kev lim dej thiab kev tiv thaiv surge.

2) Cov roj teeb thaub qab: Qhov tseem ceeb, Cov roj teeb uas tswj los ntawm Valve (VRLA) tau koom ua ke hauv PSU systems. Lawv muab lub zog thaub qab tam sim ntawd thaum lub sijhawm AC mains tsis ua haujlwm, ua kom ntseeg tau tias ua haujlwm tas mus li rau ntau teev, tso cai rau kev txav mus los ntawm tsheb ciav hlau lossis coj cov ntu mus rau qhov xwm txheej tsis ua haujlwm. Qhov kev faib hluav taws xob DC no feem ntau yog radial, nrog cov khoom siv fused rau cov khoom siv ib leeg.

2. Chaw Tswj Xyuas & Kev Sib Txuas Lus: Cov "hlwb" ntawm lub kaw lus signaling (piv txwv li, relay interlockings, computer-based interlockings/RBCs, control panels/workstations) xav tau lub zog ruaj khov. Lawv feem ntau siv:

1) Cov Khoom Siv Hluav Taws Xob Tsis Txuas (UPS): Cov kab ke no siv AC mains input, kho nws mus rau DC kom them loj cov txhab nyiaj roj teeb (feem ntau yog VRLA), thiab tom qab ntawd tig nws rov qab mus rau AC (feem ntau yog 230V AC) rau cov khoom siv tswj hwm rhiab heev. Cov roj teeb muab kev thaub qab zoo thaum lub sijhawm hluav taws xob tsis ua haujlwm.

2) Cov Khoom Noj Rov Qab: Cov chaw tseem ceeb feem ntau muaj ob lub tshuab hluav taws xob AC ywj pheej los ntawm cov chaw faib hluav taws xob sib cais kom muaj kev ruaj khov ua ntej UPS pib siv.

Lub ntsiab lus: Cov khoom siv fais fab rau kev teeb liab ntawm txoj kev tsheb ciav hlau yog cov kab ke uas muaj kev ruaj khov siab. Lawv hloov cov hluav taws xob AC loj mus ua cov DC uas tau tswj hwm zoo rau cov khoom siv ntawm txoj kev thiab siv cov tshuab UPS/roj teeb zoo rau cov chaw tswj hwm. Kev suav nrog cov roj teeb thaub qab thoob plaws txhua qib yog qhov tseem ceeb, lav tias lub kaw lus ua haujlwm kom raug los ntawm kev cuam tshuam hluav taws xob thiab kev tsis ua haujlwm, ncaj qha txhawb nqa kev nyab xeeb ntawm txoj kev tsheb ciav hlau. Txoj hauv kev no ua kom ntseeg tau tias "tam sim no" tseem ceeb ntawm cov ntaub ntawv thiab kev tswj hwm yeej tsis nres.