- 1. Voltage thiab tam sim no sib piv
(1) Peb-theem hluav taws xob (380V)
Rated voltage xaiv: Lub withstand voltage ntawm lub thyristor yuav tsum yog tsawg kawg yog 1.5 npaug ntawm qhov ua hauj lwm voltage (pom zoo siab tshaj 600V) los tiv thaiv lub ncov voltage thiab transient overvoltage.
Kev suav tam sim no: Peb-theem load tam sim no yuav tsum tau muab xam raws li tag nrho lub zog (xws li 48kW), thiab qhov pom zoo ntsuas tam sim no yog 1.5 npaug ntawm qhov tam sim no (xws li 73A load, xaiv 125A-150A thyristor).
Kev tswj qhov sib npaug: Txoj kev tswj peb-theem ob-theem tuaj yeem ua rau txo qis zog thiab qhov hloov pauv tam sim no. Zero-crossing trigger los yog theem-hloov tswj module yuav tsum tau muab ntsia kom txo qis kev cuam tshuam nrog cov kab hluav taws xob.
(2) Ob-theem hluav taws xob (380V)
Voltage adaptation: Ob-theem hluav taws xob yog ib-theem 380V, thiab ib tug bidirectional thyristor (xws li BTB series) yuav tsum tau xaiv, thiab cov voltage kuj yuav tsum tau siab tshaj 600V.
Kev hloov kho tam sim no: ob-theem tam sim no siab dua li peb-theem tam sim no (xws li txog 13.6A rau 5kW load), thiab qhov loj dua tam sim no yuav tsum tau xaiv (xws li saum toj 30A).
2. Cov txheej txheem xaim thiab ua kom tawg
(1) Peb-theem txuas:
Xyuas kom meej tias lub thyristor module txuas nrog hauv cov kab ntawm theem kab tawm tswv yim kawg, thiab cov kab teeb liab yuav tsum luv luv thiab cais tawm ntawm lwm cov kab kom tsis txhob cuam tshuam. Yog siv xoom-crossing triggering (txhim kho-state relay txoj kev) yog siv, harmonics yuav raug txo, tab sis lub hwj chim tswj qhov tseeb yuav tsum tau siab; rau theem-ua haujlwm ua haujlwm, yuav tsum tau them nyiaj rau qhov hloov pauv voltage (du / dt) kev tiv thaiv, thiab lub resistor-capacitor absorption circuit (xws li 0.1μF capacitor + 10Ω resistor) yuav tsum tau nruab.
(2) Ob-theem hluav taws xob:
Bidirectional thyristors yuav tsum paub qhov txawv ntawm T1 thiab T2 ncej, thiab tus ncej tswj (G) lub teeb liab yuav tsum tau synchronized nrog lub load. Nws raug nquahu kom siv ib qho kev sib cais optocoupler kom tsis txhob muaj kev sib txuas tsis raug.
3. Thaum tshav kub kub dissipation thiab tiv thaiv
(1) Thaum tshav kub kub dissipation yuav tsum:
Thaum qhov tam sim no tshaj 5A, lub dab dej kub yuav tsum tau nruab, thiab cov roj thermal yuav tsum tau siv los xyuas kom muaj kev sib cuag zoo. Lub plhaub kub yuav tsum tau tswj qis dua 120 ℃, thiab cua txias yuav tsum tau siv thaum tsim nyog.
(2) Kev tiv thaiv kev ntsuas:
Kev tiv thaiv overvoltage: Varistors (xws li MYG series) nqus cov hluav taws xob hloov pauv siab.
Kev tiv thaiv overcurrent: fast-blow fuse yog txuas nrog nyob rau hauv series nyob rau hauv lub anode Circuit Court, thiab cov ntsuas tam sim no yog 1.25 npaug ntawm thyristor.
Voltage hloov pauv tus nqi txwv: parallel RC damping network (xws li 0.022μF / 1000V capacitor).
4. Fais fab mov thiab efficiency
Nyob rau hauv peb-theem system, theem tswj kev hloov pauv yuav ua rau lub zog ua kom txo qis, thiab cov nyiaj them rau cov capacitors yuav tsum tau muab ntsia rau ntawm qhov hloov pauv.
Ob-theem system yog nquag mus rau harmonics vim load imbalance, yog li nws raug pom zoo kom txais yuav xoom-hloov trigger los yog lub sij hawm-siv tswj lub tswv yim.
5. Lwm yam kev xav
Kev pom zoo rau kev xaiv: muab qhov tseem ceeb rau cov thyristors modular (xws li Siemens hom), uas sib xyaw ua kom muaj zog thiab tiv thaiv kev ua haujlwm thiab ua kom yooj yim txuas.
Kev soj ntsuam xyuas: tsis tu ncua siv multimeter los kuaj xyuas lub xeev conduction ntawm thyristor kom tsis txhob luv luv lossis qhib Circuit Court; txwv tsis pub siv megohmmeter los kuaj cov rwb thaiv tsev.
Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thovtiv tauj peb!
Post lub sij hawm: Lub Xya hli ntuj-16-2025
