Labarai

Labarai

AC aiki, RC karuwa sha kewaye zane & bangaren selection Share

 AC ƙarfin lantarki aiki : Karkashin AC ko DC ƙarfin lantarki, ko a hade da DC, za ka iya amfani da duk HVC membrane capacitors. Ka'idodin aikace-aikacen nasara shine: 1) Kada ku wuce ƙarfin ƙarfin lantarki na dielectric; 2) Ci gaba da sanyaya capacitor; 3) Kar a dauki aikin corona. A matsayin aikace-aikacen aikace-aikacen, ga yadda kuke amfani da waɗannan dokoki guda uku.

Ƙayyadadden ƙarfin wutar lantarki shine ƙimar wutar lantarki ta DC. Iyakance samfurin kololuwar yanzu a cikin ƙimar adadin iya aiki da ƙimar ƙimar DV/DT. Don manyan ayyuka masu yawa don iyakance ƙarancin wutar lantarki, don haka zafin zafin jiki na casa na waje bai wuce 15 ° C ba, kuma a lokaci guda zafin zafin jiki na waje bai wuce matsakaicin zafin aiki ba.

Don doka ta 3, iyakance wutar lantarki ta waje zuwa kowane nau'in matsakaicin ƙimar AC don gujewa korona.
Corona wani tsari ne na insulating a cikin tsarin rufewa don haifar da ɓarna ɓarna na dielectric ta pores na iska. Abin da ya faru yana rakiyar aikace-aikacen wutar lantarki na AC saboda tasirin tasiri na pore yana ƙasa da abin da ke kewaye da dielectric. Kamar yadda aka haɗa capacitor mai ƙarancin ƙima a cikin jeri, rami ya karye ta hanyar babban ƙarfin ƙarfin lantarki. Ya kamata a guje wa Dizzy na Masara saboda tartsatsin wuta yana haifar da dielectric carbonization don canza shi zuwa wani abu mai sarrafawa, kuma travo na ƙarshe na carbon yana da ɗan gajeren lokaci.

 

RC absorption/snubber kewaye zane

Shaye-shaye iri-iri iri-iri ne na da'irori masu sauƙin sha na makamashi don kawar da fitilun wutar lantarki da ke haifar da inductance na madauki ----- Lokacin da aka kunna na'ura ko na'ura mai kwakwalwa. Manufar tsoma baki shine a cire wutar lantarki na wucin gadi da mawaunin da ke faruwa lokacin da aka kunna.
Yana faruwa don samar da da'ira na zaɓi lokacin da halin yanzu ke gudana a cikin inductor na ɗigo na asali lokacin da aka kunna. Sub-absorption a cikin yanayin sauya wutar lantarki yana ba da ɗaya ko fiye daga cikin ayyuka masu mahimmanci guda uku masu zuwa:
1) Canja layin mai ɗaukar hoto na transistor mai jujjuya bipolar don ajiye shi a cikin amintaccen wurin aiki;
2) Cire makamashi daga transistor tuƙi, cinye makamashi a cikin resistor don rage yawan zafin jiki na haɗin gwiwa;
3) Rage oscillation a kan sauya transistor ko mai gyara diode don iyakance mafi girman ƙarfin lantarki, rage EMI ta hanyar rage fitar da iska da rage mitar sa.

 

Mafi yawan amfani da kewaye sha soot shine capacitor da jerin resistor ta hanyar haɗin wuta. Anan ga yadda ake zana damper na RC na yau da kullun:
 
Zaɓin ɓangaren: Zaɓi resistor mara inductor. Kyakkyawan zaɓi shine resistor carbonaceous. Juriyar fim ɗin Carbon zaɓi ne mai kyau sai dai idan an rage shi don rage juriya a cikin jujjuyawar karkace. Ka guje wa iska saboda yana da inductance. Zaɓin juriya daga takaddar bayanan don jure yanayin babban halin yanzu na zafin jiki iri ɗaya a cikin damper. Don ƙarfin ƙarfin 0.01 μF na sama, ana fara la'akari da madaidaicin mica na resin epoxy immersion. Don mafi girman ƙimar ƙarfin ƙarfin, ana la'akari da polypropylene gubar madaidaiciya, capacitors na fim ɗin. Baya ga haɓakar haɓakar haɓakar haɓakar na'urar axial, nau'in WPP na jagorar axial shima yana da kyau. Matsakaicin ƙimar ƙarfin lantarki shine 630 volts DC, mafi girma shine 1000 volts DC. Domin mafi girma irin ƙarfin lantarki da capacitance, a polypropylene tsare film capacitor da aka zaba, ciki har da iyo, metallization fim a matsayin janar tsare fim don cimma karamin size. Yin amfani da fim ɗin ƙarfe yana rage girman ƙarfin halin yanzu don samar da 1/3 zuwa 1/5 na sauran zaɓin matsa lamba.
 
Tsarin zaɓin a cikin takaddar bayanan yana da sauƙi - mafi girman halin yanzu kuma ana samar da ƙarfin halin yanzu na RMS tare da ƙimar ƙarfin wuta. Mafi girman ƙarfin shine samfurin ƙarfin DV/DT da ƙarfin ƙima. Ƙarfin RMS na yanzu ƙaramin ƙima ne wanda capacitor ya kasance 10 ° C ko na yanzu na capacitor don isa ga canjin wutar lantarki na yanzu.
 

Za a iya amfani da teburin iyawar mu na DV/DT don kwatanta ƙarfin shayarwar CDE da sauran samfuran. Don duk shayar da likitan fiɗa, ƙimar DV/DT na iya jure ƙimar DV/DT, kuma nau'in HPP na iya jure fiye da 2000 V/μs. Don masu ɗaukar matsa lamba mai ƙarfi, nau'ikan HPFF da HPPS na iya aiwatar da fiye da 3,000 V / μs; HPMF da HPPM iri, suna janye fiye da 1000 V / μs. Don ganin teburin bayanai bisa ga tsawon gidan.

 

Sauran capacitors: Anan shine jumla ta ƙarshe ta zaɓin capacitor, don taimaka muku shigar da filin ƙarfin da ba'a bayyana ba, wanda ba a fayyace shi cikin amfani da na'urar ɗaukar nauyi ba, kuma ba a cikin wannan ɓangaren ba.


Ya kamata a san nau'in nau'in yumbura mai girma K waɗanda ke da iyakacin kololuwar halin yanzu da ƙarfin ɗaukar nauyi, kuma tsari shine 50 zuwa 200 V / μs. Polyester yana da asarar polypropylene sau 15, kuma polyester ɗin ya dace da ƙarancin RMS na yanzu ko sake zagayowar alhaki. A lokaci guda, tabbatar an yi la'akari da ƙimar wutar lantarki da yawan zafin jiki. Ko da yake mica ko DPP nau'in capacitance ya kusan zama mai zaman kanta daga ƙarfin lantarki da zafin jiki, babban-k yumbu dielectric (kamar Y5V) na iya rasa 1/4 na ƙarfinsa daga zafin jiki zuwa 50 ° C (122 ° F), daga 0 zuwa 50% . Wani ƙarfin 1/4 na iya ɓacewa yayin ƙimar ƙarfin lantarki.

Tsare-tsare mai sauri na Board: Lokacin amfani da wutar lantarki ba shi da mahimmanci, akwai hanya mai sauri don ƙirƙira abin jujjuyawa. Yi shiri tare da watts 2 na juriya na carbonaceous. Zaɓi ƙimar juriya ta yadda halin yanzu guda ɗaya zai iya ci gaba da gudana ba tare da nauyin wutar lantarki ba, kuma ana juyar da na yanzu zuwa na'urar ɗaukar nauyi bayan an kunna na'urar. Matsalolin da ke gudana a cikin na'ura kafin a kunna ma'auni ko lissafin na'urar, da lokacin da ke gudana kafin a kunna.