Polarity Reversing Rectifier

Lub Polarity Reversing Rectifier (PRR) yog ib qho khoom siv hluav taws xob DC uas tuaj yeem hloov qhov polarity ntawm nws cov zis. Qhov no ua rau nws muaj txiaj ntsig tshwj xeeb hauv cov txheej txheem xws li electroplating, electrolysis, electromagnetic braking, thiab DC lub cev muaj zog tswj, qhov uas yuav tsum tau hloov cov kev taw qhia tam sim no.

1. Nws ua haujlwm li cas
Tsis tu ncua rectifiers hloov AC rau DC nrog lub polarity ruaj. PRRs tsim rau qhov no los ntawm kev siv cov khoom siv hluav taws xob tswj tau - xws li thyristors, IGBTs, lossis MOSFETs - txhawm rau thim cov dej ntws tam sim no. Los ntawm kev kho lub kaum sab xis tua lossis hloov cov kab ke, lub cuab yeej tuaj yeem ua tau yooj yim lossis nrawm nrawm cov zis tawm ntawm qhov zoo mus rau qhov tsis zoo.

2.Circuit Structure
Feem ntau, PRR siv tus choj tswj tag nrho cov rectifier:
AC Input → Tswj Rectifier Choj → Lim → Load
Tus choj muaj plaub yam tswj tau. Los ntawm kev tswj cov khoom siv twg thiab thaum twg, cov zis tuaj yeem hloov pauv ntawm:
▪ Positive polarity: tam sim no ntws los ntawm qhov zoo davhlau ya nyob twg mus rau lub load.
▪ Negative polarity: tam sim no ntws nyob rau hauv qhov opposite direction.
Cov qib hluav taws xob kuj tuaj yeem hloov kho los ntawm kev hloov lub kaum sab xis (α), tso cai rau kev tswj hwm ntawm ob qho tib si polarity thiab qhov loj.

3. Daim ntawv thov
(1) Electroplating & Electrolysis
Qee cov txheej txheem xav tau tam sim no rov qab ua ntu zus los txhim kho cov txheej txheem zoo. PRRs muab ib qho kev tswj tau, bidirectional DC mov kom tau raws li qhov yuav tsum tau ua.
(2) DC lub cev muaj zog tswj
Siv rau pem hauv ntej / thim rov qab ua haujlwm thiab rov tsim dua tshiab, rov qab lub zog rau lub cev.
(3) Electromagnetic Braking
Reversing tam sim no enables ceev braking los yog tswj kev tso tawm ntawm txhua yam tshuab.
(4) Kev kuaj thiab kuaj
PRRs muab programmable bipolar DC tso zis, zoo tagnrho rau kev tshawb fawb, kev sim, thiab kev sim uas yuav tsum tau hloov pauv polarity.

Polarity-reversing rectifiers tau dhau los ua qhov tseem ceeb hauv kev lag luam thiab kev tshawb fawb. Lawv muab cov polarity tswj tau yooj yim nrog lub zog hloov pauv, ua rau lawv qhov tseem ceeb rau ntau yam kev siv hluav taws xob niaj hnub siv hluav taws xob. Raws li cov cuab yeej thiab kev tswj hwm thev naus laus zis txhim kho, PRRs xav tias yuav pom kev siv dav dua.