Electrostatic Shielding na Transformers

 

 

 

 

Ihe nchekwa electrostatic, na physics, na-ezo aka n'ihe omume ebe a na-eji shei mechiri emechi nke onye na-eduzi ihe na-ekewapụ mpaghara dị n'ime ya na mmetụta nke ọkụ eletrik dị n'èzí. Itinye ụkpụrụ a n'ọrụ na ngbanwe na-enye anyị ihe a maara dị ka ihe nchekwa ọkụ ọkụ (E-Shield).

N'ihe owuwu nke ngbanwe, ọta electrostatic na-abụkarị aMpempe ọla kọpa emechiri emechi ma ọ bụ akwụkwọ na-eduzi magnetik na-abụghị{{0}etinyere n'etiti ikuku nke isi na ikuku nke abụọ. Emebere ya ka ọ bụrụ "emechiri emechi" iji gbochie ya ịmepụta loop sekit dị mkpụmkpụ na iwebata ihe ugbu a. A na-ejikọta ihe a na-eduzi ihe a na-adabere na ihe ntụgharị ma ọ bụ n'ala site na waya, na-emepụta ahụ nchebe dị irè.

 

 

Mgbe mgbaama nnyonye anya dị elu{{0}Ugboro (dị ka mkpọ si na grid ọkụ, ọkụ ọkụ, ma ọ bụ elu{1}mkpọtụ ugboro ugboro sitere na draịva na-agbanwe agbanwe) pụtara n'akụkụ nke mbụ, nnyonye anya a na-aga n'akụkụ nke abụọ site na inter{2} na-eku ume parasitic capacitance, na-emetụta ogo ike.

Mgbe agbakwunyere ọta electrostatic, ọnọdụ ahụ na-agbanwe nke ọma. Ọta ahụ na-ekewa ikike otu ikike mbụ (CHL, ikike dị n'etiti elu{1}voltaji na obere{2}} akụkụ voltaji) n'ime usoro ikike abụọ: ikike sitere na nke mbụ ruo ọta na ikike sitere na ọta gaa na nke abụọ. N'ihi na ọta na-adabere ozugbo, ọ na-enye annọọ ala impedance ụzọ n'alamaka mmịnye nnyonye anya dị elu{{0}. Dị ka otu onye na-ahụ maka nkà na ụzụ kọwara: "Ọta electrostatic na-arụ ọrụ dị ka ihe nzacha capacitive, na-egbochi ihe ndị dị oké egwu na-ebufe n'akụkụ nke abụọ." N'ihi nke a, nnukwu - nnyonye anya ugboro ugboro na-agbada n'ala kama ịga n'ihu n'ibu nke abụọ, si otú ahụ "na-eme ka" ike eletrik na-arụpụta.

 

 

 

 

 

 

Ọta electrostatic dị na transformer na-arụkarị ọrụ ndị a:

 

 

Atụmatụ na Uru

Ndị ntụgharị na-eji ọta electrostatic nwere atụmatụ na uru ndị a ama ama:

Njirimara	Uru	Ngosipụta nka nka/nkọwa
Mgbochi dị elu-Ntinye	Na-ebelata mkpọtụ dị elu{{0}ugboro na nnyonye anya ụkpụrụ{1} na ọkọnọ ọkụ	Ọnwụ ntinye ụdị {{0} na-adịkarị karịa ma ọ bụ ha nhata 60dB na 1MHz, mbelata ọkụ ọkụ karịrị ma ọ bụ nhata 70%
Ike njikọta dị oke ala	Na-enweta ikewapụ dị elu, "na-ebufe magnetism naanị, ọ bụghị ọkụ eletrik"	Ike ikesa nkesa n'etiti windings nwere ike ịdị obere ka 0.01pF
Ọdịmma Ike emelitere	Na-ebelata ndakpọ ndakpọ nke voltaji mmepụta	Na gburugburu klaasị C3, THDU dara site na 3.1% ruo 0.8%
Nchekwa dị elu	Na-enye akụrụngwa - nchedo ọkwa, na-ebelata ntapu ugbu a	Ọpụpụ ugbu a nwere ike ịdị obere ma ọ bụ nhata 10µA na ngwa sistemụ IT ahụike
Ọkachamma Ikike Ọjụjụ Na-ajụkarị{{0}	Ike mbelata mkpọtụ mkpọtụ	Ụfọdụ K{0} ihe mgbanwe mgbanwe nwere ike nweta nbibi ụda mkpọtụ{1} na-emekarị ruo120dB

 

 

 

 

 

 

 

 

 

 

 

1. Ntinye Nleba Ọnwụ
Nke a bụ usoro a kapịrị ọnụ maka ịtụ ike ọta iji belata nnyonye anya dị elu{0}. Ụkpụrụ ule gụnyere ịgbanye akara ngosi dị elu{2} nke njupụta nke ama ama (V1) na ntinye nke transformer na tụọ njupụta mgbaàmà (V2) na mmepụta mgbe ọ gafesịrị na transformer. Akọwapụtara mfu ntinye dị ka20 × ndekọ (V1/V2)ma gosipụta ya na decibels (dB). Ọnụ ahịa dị elu na-egosi ikike nkwụsị siri ike nke ọta megide nnyonye anya. Ọmụmaatụ, trafomic transformer实测 nwere otutu ntinye ntinye - nke kariri 60dB na 1MHz.

2. Nnwale ọnọdụ{{1} na-ahụkarị
nnyonye anya - na-ezo aka na nnyonye anya na-eme n'etiti onye nduzi na ala. Ebumnobi a na-enyochakarị - mode bụ inyocha ike nke transformer ibelata mkpọtụ ọnọdụ-. N'oge ule a, a na-etinye akara ngosi - (ụkpụrụ a na-etinye n'otu oge n'etiti ahịrị ntinye na ala niile) na ntinye, a na-atụkwa nzaghachi ụdị - na mmepụta. Ọmarịcha ọta electrostatic kwesịrị ime ka mkpọtụ ọnọdụ - na-emekarị ka ọ dị obere. Akwụkwọ ABB's K{10}Fact transformer na-egosi mbelata mkpọtụ ọnọdụ{11} na-emekarị ruo120dB.

3. Nnwale ụdị -Ụdị/Ntugharị - na-emekarị
Ntugharị - mode (nke a makwaara dị ka nnyonye anya dị iche{1}}) na-ezo aka na nnyonye anya dị n'etiti ahịrị mgbama na ụzọ nloghachi ya. N'ule dị irè, ọ na-adị mkpa ka a tụle ya nke ọma n'ụzọ zuru ezu ike transformer nwere igbochi ụdị nnyonye anya abụọ ahụ. Dịka ọmụmaatụ, mgbe a na-anwale ihe ngbanwe netwọkụ, a na-eji ihe nyocha netwọkụ yana balun transformers tụọ ọnwụ ntinye (na-egosipụta attenuation nke akara ngosi n'ozuzu ya) yana ụkpụrụ jụrụkarị - (kpọmkwem na-egosipụta attenuation nke akara ngosi nke nkịtị-mode).

4. Nchọpụta Anomaly na Nnwale ihe kpatara ike
N'ụzọ na-akpali mmasị, ọnụnọ nke ọta electrostatic nwere ike mgbe ụfọdụ "gbagwojuru" testers. N'oge a na-anwale ihe nrụnye ọkụ nke transformer, n'ihi na ọta na-enye ụzọ ala dị ala{{1} impedance, a na-akụnye ihe dị ugbu a nke kwesịrị isi na elu{2}}voltaji ruo ala-voltage insulation (CHL) gbatuo n'ala. Nke a na-ebute obere CHL dị ugbu a tụrụ na UST (Unspecified Specimen Test) mode, mgbe ụfọdụ ọbụna na-eduga n'ịgụ ihe ike na-adịghị mma - nke bụ n'ezie ihe arụpụtara site na nhọrọ nke ihe nleba anya ugbu a, ọ bụghị ezigbo anụ ahụ. Ndị nyocha nwere ahụmahụ na-ejikọta GST-G (Nnwale Grounded Specimen with Guard) yana nsonaazụ UST iji kpee ikpe n'ụzọ zuru ezu ọnọdụ mkpuchi nke transformer.

 

 

N'usoro, ohia ọta na-agbadata na-abanyekarị na mkpuchi mkpuchi ma ọ bụ mgbidi tank. Otu njedebe na-ejikọta ya na ọta electrostatic (dịka ọmụmaatụ, mpempe akwụkwọ ọla kọpa ma ọ bụ akwụkwọ na-eduzi) n'ime ihe ntụgharị ahụ, ebe njedebe nke ọzọ na-agbatị n'èzí ihe ntụgharị maka njikọ na grid grounding. N'ụdị ụfọdụ, ịhịa aka n'onwe ya nwere ike jikọta ọrụ nchekwa- dịka ọmụmaatụ, itinye ntupu igwe gbadoro ụkwụ n'ime mgbidi osisi iji gbochie itinye uche n'ubi eletrịkị ma ọ bụ mwepu akụkụ nke nwere ike ime na nnukwu njikọ njikọ voltaji - (dị ka nkwonkwo bọsbar ọla kọpa).

 

Ọrụ nke Grounding Shield Bushing

Enwere ike ichikota isi ọrụ ya dị kaụzọ nchekwa{0} pụọnaelu -mgbochi ugboro ugboro:

1. Na-enye ụzọ mgbada ala{{1} dị ala maka ọta electrostatic

Nke a bụ isi ọrụ ya. Ọta electrostatic ga-agbadorịrị nke ọma ka o wee nwee nnukwu mmịnye ọkụ n'ụwa. Ngwunye ọta na-ahụ maka ala na-enye onye na-eduzi ọkọlọtọ, mkpuchi na nke a pụrụ ịdabere na ya nke na-agafe ọta dị n'ime site na tankị nke na-atụgharị gaa na waya ala dị n'èzí, na-eme ka ọkụ eletrik na-aga n'ihu na nkwụsi ike nke usoro nke ụzọ ala.

2. Na-egbochi ntugharị nke nnukwu mmiri nnyonye anya ugboro ole{{1}

Na-enweghị ihe mgbakwasị ala raara onwe ya nye, waya mgbada nke ọta electrostatic nwere ike ịgafe ebe nchekwa ihe ngbanwe ma ọ bụ ihe ndị ọzọ, nke nwere ike iwebata inductance ọzọ ma ọ bụ mepụta mmetụta antenna, si otú ahụ na-ebelata nkwụsị nke nnyonye anya dị elu{{0} ugboro ugboro. Nhazi nke ịhịa aka n'ahụ raara onwe ya nye na-edobe ihe mgbochi dị ala{2} nke ụzọ mgbada n'ogo dị elu, na-ahụ na ọ ga-agafe mmiri nke nnyonye anya nke ọma ruo n'ala.

3. Akara na mkpuchi

Dị ka tank {{0} ihe ndị na-abanye n'ime ya, ohia ọta na-akụ ala ga-ahụrịrị na ejiri mmanụ transformer kpuchie ya iji gbochie ntapu. Ka ọ dị ugbu a, ọ chọrọ ike mkpuchi zuru oke iji nagide voltaji n'etiti ọta electrostatic dị n'ime na ikike ala, na-ezere nkwụsị ala.

4. Na-ewepụ mkpofu akụkụ (maka ọta - agbakwunyere ohia)

N'ụfọdụ ngwa voltaji{{0} dị elu, ebe ndị na-eduzi ihe siri ike (dịka ọmụmaatụ, bọsbọchị ọla kọpa) na-eduru banye na transformer site n'ime ọhịa nwere ike ime ka ọ pụta ìhè, ọ bụghị naanị na-ebute mkpọtụ kamakwa na-eweda mkpuchi. Site n'itinye oyi akwa mkpuchi ala (dị ka ntupu igwe ma ọ bụ tube metal) n'ime ụlọ ịhịa aka n'ahụ, enwere ike ichekwa ebe ọkụ eletrik na-ezighi ezi, si otú a na-ewepụ mkpofu yana hụ na nchekwa akụrụngwa.