Polarity Reversing Rectifier

Ib qho Polarity Reversing Rectifier (PRR) yog ib lub cuab yeej siv hluav taws xob DC uas tuaj yeem hloov qhov polarity ntawm nws cov zis. Qhov no ua rau nws muaj txiaj ntsig zoo hauv cov txheej txheem xws li electroplating, electrolysis, electromagnetic braking, thiab DC motor tswj, qhov twg hloov qhov kev taw qhia tam sim no yog qhov tsim nyog.

1. Nws Ua Haujlwm Li Cas
Cov rectifiers ib txwm hloov AC mus rau DC nrog lub polarity ruaj khov. PRRs tsim los ntawm qhov no los ntawm kev siv cov khoom siv fais fab tswj tau - xws li thyristors, IGBTs, lossis MOSFETs - los thim rov qab qhov ntws tam sim no. Los ntawm kev kho lub kaum sab xis lossis kev hloov pauv, lub cuab yeej tuaj yeem hloov pauv qhov tso zis los ntawm qhov zoo mus rau qhov tsis zoo.

2. Cov Qauv Circuit
Feem ntau, PRR siv lub tshuab hluav taws xob uas tswj tau tag nrho:
AC Input → Choj Rectifier Tswj → Lim → Thauj Khoom
Tus choj muaj plaub yam khoom uas tswj tau. Los ntawm kev tswj cov khoom siv uas ua haujlwm thiab thaum twg, cov zis tuaj yeem hloov ntawm:
▪ Positive polarity: tam sim no ntws los ntawm qhov chaw nres nkoj zoo mus rau qhov khoom thauj.
▪ Qhov polarity tsis zoo: tam sim no ntws mus rau sab nraud.
Cov theem hluav taws xob kuj tseem tuaj yeem hloov kho tau los ntawm kev hloov lub kaum sab xis (α), uas tso cai rau kev tswj hwm qhov polarity thiab qhov loj.

3. Cov ntawv thov
(1) Kev siv hluav taws xob thiab kev siv hluav taws xob
Qee cov txheej txheem xav tau cov hluav taws xob rov qab los tas li kom txhim kho qhov zoo ntawm cov txheej. PRRs muab cov khoom siv DC uas tswj tau thiab ob txoj kev los ua kom tau raws li qhov yuav tsum tau ua no.
(2) Kev Tswj Xyuas Lub Cev Muaj Zog DC
Siv rau kev ua haujlwm pem hauv ntej/rov qab thiab kev nres tsheb rov qab, rov qab lub zog rau lub kaw lus.
(3) Kev Nres Hluav Taws Xob
Qhov tam sim no thim rov qab ua rau lub zog nres sai lossis tswj tau qhov kev tso tawm ntawm cov tshuab.
(4) Chaw Kuaj Mob & Kev Ntsuas
PRRs muab cov zis bipolar DC programmable, zoo tagnrho rau kev tshawb fawb, kev sim, thiab kev sim uas xav tau polarity hloov pauv tau.

Cov rectifiers uas tig rov qab polarity tau dhau los ua qhov tseem ceeb hauv kev lag luam thiab kev tshawb fawb. Lawv ua ke kev tswj hwm polarity yooj ywm nrog kev hloov pauv hluav taws xob zoo, ua rau lawv tseem ceeb rau ntau daim ntawv thov hluav taws xob niaj hnub. Raws li cov cuab yeej thiab kev tswj hwm thev naus laus zis zoo dua, PRRs yuav pom kev siv dav dua.