Soft Start thiab Optimization Technology ntawm AC Asynchronous Tsav

1. Muaj xwm txheej ntawm kev pib ncaj qha
Direct pib yog ib qho yooj yim pib txoj kev, uas txuas lub cev muaj zog ncaj qha mus rau lub hwj chim daim phiaj los ntawm ib tug hloov los yog contactor thaum pib. Qhov zoo ntawm kev pib ncaj qha yog cov cuab yeej pib yooj yim thiab pib nrawm, tab sis qhov teeb meem ntawm kev pib ncaj qha yog qhov tseem ceeb:
(1) Kev cuam tshuam ntawm daim phiaj hluav taws xob: Kev pib tam sim no ntau dhau (tsis muaj qhov pib tam sim no tuaj yeem ncav cuag 4-7 zaug ntawm qhov ntsuas tam sim no, thiab tuaj yeem ncav cuag 8-10 zaug lossis ntau dua thaum pib nrog load) tuaj yeem ua rau txo qis zog daim phiaj hluav taws xob, cuam tshuam rau kev ua haujlwm ib txwm muaj ntawm lwm yam khoom siv hluav taws xob, thiab tseem tuaj yeem ua rau kev tiv thaiv undervoltage ua, ua rau muaj teeb meem tsis zoo ntawm cov khoom siv. Nyob rau tib lub sijhawm, kev pib tam sim no ntau dhau yuav ua rau lub cev muaj zog winding kom sov, yog li ua kom cov rwb thaiv tsev laus thiab cuam tshuam rau lub cev muaj zog;
(2) Mechanical impact: Feem ntau cuam tshuam torque feem ntau ua rau tawg ntawm lub cev muaj zog rotor tawb thiab lub nplhaib kawg, nrog rau kev rwb thaiv tsev ntawm stator kawg winding, ua rau tawg thiab hlawv ntawm lub tshuab, twisting ntawm ncej, puas. kev sib txuas thiab kis tau tus mob, thiab tearing ntawm txoj siv;
(3) Kev cuam tshuam rau cov tshuab tsim khoom: Kev hloov pauv sai thaum lub sijhawm pib ua haujlwm feem ntau ua rau kev puas tsuaj rau cov kav dej thiab cov li qub, ua rau lawv lub neej ua haujlwm luv; Muaj feem cuam tshuam rau kev kis tau tus mob thiab txawm tias cov txheej txheem zoo li qub.
Tag nrho cov no ua rau muaj kev hem thawj rau kev nyab xeeb thiab txhim khu kev qha ntawm cov cuab yeej siv, thaum tseem ua rau lub zog pib poob, tshwj xeeb tshaj yog thaum pib thiab nres. Yog li, muaj cov kev txwv hauv qab no rau kev pib ncaj qha ntawm lub cev muaj zog:
(1) Txawm hais tias cov tshuab tsim khoom raug tso cai ncaj qha los ntawm kev rub lub tshuab hluav taws xob yog qhov yuav tsum tau ua ua ntej;
(2) Lub peev xwm ntawm lub cev muaj zog yuav tsum tsis pub tshaj 10 feem pua ​​​​mus rau 15 feem pua ​​​​ntawm lub peev xwm ntawm lub zog hloov pauv;
(3) Lub zog poob △ U thaum pib txheej txheem yuav tsum tsis pub tshaj 15 feem pua ​​​​ntawm qhov ntsuas hluav taws xob. Rau nruab nrab thiab siab zog motors, kev pib ncaj qha feem ntau tsis tso cai, thiab qee yam khoom siv pib yuav tsum ua kom tiav qhov pib pib ua haujlwm.
2. Tshiab hluav taws xob mos pib
Nrog rau kev tsim hluav taws xob hluav taws xob hluav taws xob thiab microcomputer tswj thev naus laus zis, cov khoom siv hluav taws xob pib tswj hluav taws xob tau tsim tawm ob qho tib si hauv tsev thiab thoob ntiaj teb rau kev pib tswj ntawm asynchronous motors, hloov cov tsoos pib pib cov khoom siv. Lub hauv paus tseem ceeb ntawm cov khoom siv hluav taws xob tshiab tshiab feem ntau siv lub thyristor voltage regulating circuit, uas yog tsim los ntawm rau thyristors nyob rau hauv rov qab mus rau lub parallel thiab txuas nyob rau hauv series rau peb-theem fais fab mov kab ntawm lub cev muaj zog. Thaum lub microcomputer tswj system ntawm tus pib tau txais cov lus txib pib, nws ua cov kev suav nrog thiab tso tawm cov teeb liab ntawm lub thyristor, uas tswj cov kev coj ua lub kaum sab xis ntawm lub thyristor, kho qhov tso zis voltage ntawm lub oob khab raws li hom tsim los tswj cov pib txheej txheem ntawm lub cev muaj zog. Tom qab cov txheej txheem pib ua tiav, lub tshuab hluav taws xob dav dav yuav kaw lub bypass contactor, luv-circuit tag nrho cov thyristor lub ntsiab circuits, thiab ncaj qha muab lub cev muaj zog mus rau hauv daim phiaj hluav taws xob ua haujlwm kom tsis txhob muaj lub zog poob.