Nyochaa na Ngwa Topology na Njikwa nke Transformers Elektrọnik Ike Voltaji Dị Elu nke Atọ

3.3 Nkọwapụta Ọkwa Dị Iche Iche nke Ejikọtara

E gosipụtara usoro nhazi ọtụtụ ọkwa dị iche iche nke Neutral Point Clamped (NPC). E wezụga usoro nhazi NPC nke diode clamped, usoro nhazi NPC gụnyekwara ụdị capacitor na-efe efe na ụdị njikọ ngwakọ, n'etiti ndị ọzọ. Agbanyeghị, n'ihi nnukwu olu capacitor, usoro nhazi NPC ka na-ejikarị ngwaọrụ mgbanwe passive ma ọ bụ active maka njikọta. Na-ewere usoro nhazi ọtụtụ ọkwa dị ka ihe atụ, na usoro nhazi ọkwa atọ nke rectifier, ụkwụ nke ọ bụla nwere transistors mgbanwe cascaded na diode clamping, ejikọtara na otu bọs DC dị elu voltaji. Akwụkwọ tụrụ aro usoro nhazi PET otu-phase nwere usoro nhazi site na iji sekit diode clamped anọ. Otu bọs DC dị elu voltaji na-esochi DABs ntinye-usoro-mmepụta-parallel, dịka egosiri. Enwere ike ịgbasa usoro nhazi a n'ime usoro atọ, enwere ike ịgbanwe ọnụọgụ ọkwa voltaji dabere na ọkwa voltaji na-eguzogide ngwaọrụ na ọkwa voltaji akụkụ voltaji dị elu. Dịka MMC topology, enwere ike itinye NPC topology n'ọkwa nkewa, na-ejikọ bọs DC dị elu na voltaji dị elu na Transformer nkewapụ, dịka egosiri. Akwụkwọ e tinyere ihe ntụgharị NPC nke nwere ọkwa atọ nke diode clamped n'akụkụ voltaji dị elu nke ihe ntụgharị resonant LLC, na-akwado ya na ihe nlereanya 166kW/2kV ~ 400V. Akwụkwọ e tinyere sekit NPC nke nwere ọkwa atọ nke diode clamped n'ime DAB nke nwere usoro atọ, na-enweta voltaji DAB zuru oke na njirimara ugbu a.

Mgbe ejiri NPC topology mee ihe dị ka ogbo rectifier, ọ chọghị ụgbọ ala DC dịpụrụ adịpụ, na-ebelata ọnụọgụ nke transformers ogbo iche. Ọzọkwa, na nhazi nke usoro atọ, enweghị voltaji ugboro abụọ na bọs ahụ. Agbanyeghị, n'ihi na topology a kpara akpa chọrọ ọtụtụ ngwaọrụ kpara akpa, ọnụọgụ ngwaọrụ kpara akpa na-abawanye ka ọnụọgụ ọkwa na-abawanye, na-eme ka mgbasawanye ọkwa sie ike ma sie ike inweta oge. N'ihe gbasara njikwa, ọkụ ndị na-asọba na capacitor bọs ọ bụla nke ihe ntụgharị NPC dị iche, na-eduga na enweghị nha nha voltaji capacitor. Maka topologies NPC karịrị ọkwa atọ, enweghị algọridim nhazi voltaji dị irè. Na mgbakwunye, oge ọrụ na-adịghị agbanwe agbanwe nke swiichi n'ime na n'èzí ogwe aka na-eduga na kpo oku na-adịghị mma, nke enwere ike idozi naanị site na ịgbanwe topology sekit niile.

Ọtụtụ ihe isi ike ndị sitere na mgbasawanye ọkwa na-akpata pụtara na enwere ike itinye topologies NPC naanị na ọkwa voltaji dị n'etiti/elu site na njikọ usoro ngwaọrụ ma ọ bụ iji ngwaọrụ SiC dị elu. Agbanyeghị, na ọkwa voltaji dị ala, ma e jiri ya tụnyere otu topology H-bridge, NPC dị n'ọkwa atọ nwere naanị ọkara nrụgide voltaji na nrụgide voltaji na transistor ọ bụla na-agbanwe agbanwe, ebe ọ na-ewepụta ọkwa voltaji karịa, na-ebute obere ihe achọrọ maka nzacha mmepụta. O nwere nnukwu uru ngwa dị ka ogbo inverter n'akụkụ obere voltaji nke PET. Dịka ọmụmaatụ, akwụkwọ ejiri NPC diode-clamped ọkwa atọ dị ka ogbo inverter nke PET iji kwọọ moto nke usoro atọ, na-eme nyocha nnwale ma na-enweta arụmọrụ draịva moto dị mma na arụmọrụ mkpọtụ.