Ts'ireletso ea Motlakase ho Transformers

 

 

 

 

Electrostatic shielding, ho fisiks, e bolela ketsahalo eo khetla e koetsoeng e entsoeng ka conductor e sebelisetsoang ho arola sebaka sa eona se ka hare ho tšusumetso ea masimo a motlakase a kantle. Ho sebelisa molao-motheo ona ho li-transformer ho re fa se tsejoang ka hore ke transformer electrostatic shield (E-Shield).

Ka sebopeho sa transformer, thebe ea electrostatic ke tloaelo ee seng{{0}letlapa la koporo le koetsoeng kapa-pampiri e sa tsoakoang ea makenetee behiloeng pakeng tsa matsoelintsoeke a mantlha le matsoelintsoeke a bobeli. E etselitsoe ho "se koale-" ho e thibela ho etsa loop e khuts'oane ea "circuit loop" le "inducing current". Lintho tsena tse tsamaisang li hokahane ka mokhoa o ts'epahalang le casing ea transformer kapa fatše ka terata, ho theha 'mele o sireletsang o sebetsang.

 

 

Ha mats'oao a tšitiso e phahameng{{0}e kang li-spikes tse tsoang ho grid ea motlakase, ho phahama ha lehalima, kapa{1}}lerata le phahameng ho tsoa ho li-frequency frequency drives) a hlaha ka lehlakoreng la mantlha, tšitiso ena e ea lehlakoreng la bobeli ka-mokhoa oa kokoana-hloko o sokelang, o amang boleng ba motlakase.

Kamora ho eketsa thebe ea electrostatic, boemo bo fetoha haholo. Thebe e arola bokhoni bo le bong ba mantlha (CHL, matla pakeng tsa mahlakore a phahameng-ea motlakase le a tlase{2}}ka mahlakore a mabeli a letoto: matla ho tloha ho a mathomo ho isa ho thebe le matla ho tloha ho thebe ho ea ho ea bobeli. Hobane thebe e thehiloe ka kotloloho, e fana katsela e tlase haholo ea impedance ho ea fatšebakeng sa-khatiso ea maqhubu a phahameng. Joalokaha setsebi se seng se hlalositse: "Thebe ea electrostatic ha e le hantle e sebetsa e le filthara ea capacitive, e thibelang likarolo tsa motlakase tsa bohlokoa hore li fetisetsoe lehlakoreng la bobeli." Ka lebaka leo, -tšubuhlellano ea nako e ngata e theoleloa fatše ho e-na le hore e tsoele pele ho mojaro oa bobeli, kahoo "e hloekisa" matla a tsoang ho motlakase.

 

 

 

 

 

 

Thebe ea electrostatic ka har'a transformer haholo-holo e etsa mesebetsi e latelang:

 

 

Likarolo le Melemo

Li-transformer tse sebelisang lithebe tsa motlakase li na le likarolo le melemo e latelang:

Sebopeho	Molemo	Sesupo sa Theknoloji/Tlhaloso
Tšitiso e Phahameng-	E kokobetsa haholo-lerata la khafetsa le tšitiso e tloaelehileng-mokhoeng oa phepelo ea motlakase	-tahlehelo e tloaelehileng ea ho kenya E kholo ho feta kapa e lekana le 60dB ka 1MHz, ho fokotseha ha lehalima E kholo ho feta kapa e lekana le 70%
Matla a Ho Kopanya a Tlase Haholo	E fihlella ho itšehla thajana, "ho fetisa magnetism feela, eseng motlakase"	Bophahamo bo lekanang bo ajoang lipakeng tsa li-winding bo ka ba tlase ho 0.01pF
Matla a Matla a Ntlafetseng	E fokotsa ho senyeha ha harmonic ea motlakase o tsoang	Libakeng tsa sehlopha sa C3, THDU e theoha ho tloha ho 3.1% ho ea ho 0.8%.
Polokeho e Phahameng	E fana ka -ts'ireletso ea boemo, e fokotsa ho lutla ha nako	Leakage current e ka ba Ka tlase ho kapa e lekana le 10µA lits'ebetsong tsa sistimi ea IT ea bongaka
Tsebahalang Tse Tloaelehileng-Mokhoa oa ho Hana	Bokhoni bo matla ba ho fokotsa lerata	Tse ling tsa K-Factor transformer li ka khona ho fokotsa{1}mokhoa oa ho fokotsa lerata ho fihlela120dB

 

 

 

 

 

 

 

 

 

 

 

1. Kenyellelitse Tahlehelo Liteko
Ona ke mokhoa o otlolohileng oa ho lekanya bokhoni ba thebe ba ho theola-khatiso ea khafetsa. Molao-motheo oa teko o kenyelletsa ho kenya lets'oao le phahameng-la maqhubu a tsebahalang a amplitude (V1) ha transformer e kenya le ho metha amplitude ea matšoao (V2) ha e tsoa ka mor'a hore e fete ka har'a transformer. Tahlehelo ea ho kenya e hlalosoa e le20× log(V1/V2)'me e hlahisoa ka li-decibel (dB). Boleng bo phahameng bo bontša bokhoni bo matla ba ho hatella thebe khahlano le tšitiso. Ka mohlala, Trafomic transformer实测 e na le-tahlehelo e tloaelehileng ea ho kenya ea Ho feta kapa ho lekana le 60dB ho 1MHz.

2. Tse tloaelehileng-Liteko tsa Mokhoa
Tšitiso e tloaelehileng-e bolela tšitiso e hlahang lipakeng tsa conductor ka 'ngoe le fatše. Sepheo sa ho etsa liteko tse tloaelehileng-ke ho lekola bokhoni ba transformer ea ho hatella-lerata le tloaelehileng. Ka nako ya tekolo, -mofuta o tlwaelehileng (letshwao le sebediswang ka mohato o tshwanang pakeng tsa mela yohle ya ho kenya le fatshe) hangata le sebediswa ho tse kenyang, mme -karabelo ya mokgwa o tlwaelehileng ho tlhahiso e ya lekanngwa. Moralo o motle oa "electrostatic shield" o lokela ho fokotsa{8}}lerata le tloaelehileng ho ea maemong a tlase haholo. Litokomane tsa ABB tsa K-Factor transformer li bontša{11}}mokhoa oa ho fokotsa lerata ho fihlela120dB.

3. Tse tloaelehileng-Mokhoa/Transverse-Liteko tsa Mokhoa
Tšitiso ea mokhoa oa Transverse-(eo hape e tsejoang ka hore ke phapang{1}}mokhoa oa ho kheloha) e bolela tšitiso e teng lipakeng tsa mohala le tsela ea ho khutla. Litekong tse sebetsang, hangata hoa hlokahala ho lekola ka botlalo bokhoni ba transformer ea ho hatella mefuta e 'meli ea tšitiso. Ka mohlala, ha ho lekoa li-transformer tsa marang-rang, mochine o hlahlobang marang-rang hammoho le balun transformer li sebelisoa ho lekanya tahlehelo ea ho kenya (ho bonahatsa ho fokotseha ha lets'oao lohle) le-karolelano ea ho hana mokhoa o tloaelehileng (haholo-holo ho bonts'a ho fokotseha ha -mokhoa o tloaelehileng).

4. Tlhahlobo e sa Tšoaneng ho Teko ea Matla a Matla
Hoa thahasellisa hore ho ba teng ha thebe ea electrostatic ka linako tse ling ho ka "fereka" bahlahlobi. Nakong ea teko ea motlakase oa transformer, hobane thebe e fana ka-tsela ea fatše e sa khoneng ho tsamaea, ea hona joale e lokelang ho phalla ho ea holimo-ho ea tlaase{3}}insulation ea matla a motlakase (CHL) e tsukutleha fatše. Sena se fella ka hore ho be le CHL e nyenyane haholo e lekantsoeng ka mokhoa oa UST (Tlhahlobo e sa Tsejoeng ea Specimen Test), ka linako tse ling e bile e lebisa ho matla a mabe a ho bala - e hlileng e leng ntho ea maiketsetso e bakoang ke khetho ea ntlha ea tekanyo ea hona joale, eseng ntho ea sebele ea 'mele. Bahlahlobisisi ba nang le boiphihlelo ba kopanya GST-G (Grounded Specimen Test with Guard) le liphetho tsa UST ho ahlola ka botlalo boemo ba transfoma ea tšepe.

 

 

Ha e le hantle, sehlahla sa thebe e thellang hangata se kenella sekoahelong sa tanka ea transformer kapa leboteng la tanka. Qetello e 'ngoe e hokahane ka mokhoa o sireletsehileng ho thebe ea electrostatic (mohlala, lakane ea koporo kapa pampiri e tsamaisang) ka har'a transfoma, ha pheletsong e' ngoe e fetela ka ntle ho transformer bakeng sa ho hokela marang-rang a fatše. Meralong e meng, bushing ka boeona e ka kopanya ts'ebetso ea ts'ireletso{4}}ka mohlala, ho kenya letlooeng la tšepe ka har'a lerako la bushing ho hatella matla a motlakase kapa ho tsoa ka mokhoa o sa fellang ho ka bang teng libakeng tsa khokahanyo tse phahameng-(joalo ka copper busbar joints).

 

Mesebetsi ea Grounding Shield Bushing

Likarolo tsa eona tsa mantlha li ka akaretsoa joalo kaho tsoa ka mokhoa o sireletsehileng-lethibelo e phahameng-:

1. Ho fana ka tsela e bolokehileng,{1}}e tlase e thibelang mathata bakeng sa thebe ea electrostatic

Ena ke mosebetsi oa eona oa mantlha. Thebe ea electrostatic e tlameha ho ts'oaroa hantle ho tsamaisa{1}} maqhubu a mangata a sitisang lefatše. Thebe ea fatše e fana ka mochine o tsitsitseng, o kentsoeng le o ka tšeptjoang o tsamaisang thebe ea ka hare ka tanka ea transformer ho ea terata e ka ntle ea fatše, ho netefatsa hore motlakase o tsoela pele le botsitso ba mechine ea tsela ea ho theola fatše.

2. Ho thibela ho kheloha ha maqhubu a phahameng-ea likhokahanyo tsa maqhubu

Ntle le ts'ebetso e khethehileng ea thebe, terata ea motheo ea thebe ea electrostatic e kanna ea hloka ho feta ka har'a sebaka sa transformer kapa likarolo tse ling, tse ka hlahisang inductance e eketsehileng kapa ho etsa hore lenakana le fokotsehe, kahoo la fokolisa khatello ea{0}khafetsa e phahameng. Moralo o inehetseng oa lihlahla o boloka sebaka se tlase- sa tšitiso ea tsela ea ho thea maemong a phahameng, ho netefatsa hore maqhubu a sitiso a fetele fatše ka nepo.

3. Ho tiisa le ho pata

E le tanka-karolo e phunyeletsang, thebe ea fatše e tlameha ho netefatsa hore oli ea transfoma e koala ho thibela ho lutla. Ho sa le joalo, e hloka matla a lekaneng a ho kenya letsoho ho mamella mocheso o pakeng tsa thebe ea ka hare ea motlakase le matla a fatše, ho qoba ho senyeha ha mobu.

4. Ho tlosa lero le sa fellang (bakeng sa thebe{1}}mahlaku a kopantsoeng)

Lits'ebetsong tse ling- tse nang le matla a phahameng a motlakase, libaka tse makukuno tsa li-conductors (mohlala, li-copper busbar) tse lebisitsoeng ho transformer ka har'a bushing li ka etsa hore ho be le lerata le sa hlahiseng lerata feela, empa hape le ho theola mocheso. Ka ho kopanya lera le sirelelitsoeng fatše (joalo ka mesh ea tšepe kapa tube ea tšepe) mohahong oa lihlahla, masimo a motlakase a sa lekaneng a ka sireletsoa, ​​kahoo a felisa ho tsoa le ho netefatsa tšireletso ea lisebelisoa.