Iyo yekushanda musimboti weiyo induction inonyungudusa chira accessories: thyristor

Mukushanda kwekuita kweiyo thyristor T, anode yayo A uye cathode K dzakabatana nemagetsi uye nemutoro kuumba denderedzwa hombe yetherristor, uye gedhi G uye cathode K yetristristor zvakabatana nemudziyo wekudzora thyristor kuti uite wedunhu rekutonga mudzidzisi.

Mamiriro ekushanda e thyristor:

1. Kana thyristor yakaiswa kune yakanaka anode voltage, iyo thyristor inovhenekerwa chete kana gedhi raiswa pasi pemagetsi akanaka. Panguva ino, thyristor iri pamberi pekuitisa nyika, inova thyristor’s thyristor hunhu, iyo inogona kudzorwa.

2. Kana thyristor yakavhurwa, chero bedzi paine imwe yakanaka anode voltage, zvisinei nemagetsi egedhi, iyo thyristor inoramba iripo, ndiko kuti, mushure mekunge thyristor yakavhurwa, gedhi rinorasikirwa nebasa raro. Gedhi rinongoshanda sechinhu chinokonzeresa

3. Kana thyristor yakavhurwa, kana iyo main circuit voltage (kana yazvino) ikadzikira kuvhara kusvika zero, thyristor inodzima.

4. Kana thyristor yako ichinge iine reverse anode voltage, zvisinei nemhepo inotakura gedhi, iyo thyristor iri kumashure inodzivirira nyika.

Mune iyo yepakati frequency tiravira, iyo yekugadzirisa divi yekuvhara-nguva iri mukati meKP-60 microseconds, uye inverter side inovhara kwenguva pfupi mukati meKK-30 microseconds. Uku ndiko zvakare mutsauko mukuru pakati peKP neKK machubhu. Thyristor T ndiyo anode yayo panguva yekushanda. A uye cathode K zvakabatana nemagetsi uye nemutoro kuti dzigadzire dunhu hombe retristristor. Gedhi G uye cathode K we thyristor zvakabatana nemudziyo wekudzora thyristor kuti uite dunhu rekutonga weiyo thyristor.

Kubva pakuongororwa kwemukati mekushanda kweiyo thyristor Iyo ine matatu mapfundo ePN, J1, J2, uye J3. Mufananidzo 1. Iyo NP iri pakati inogona kukamurwa kuita zvikamu zviviri kuita PNP-mhando transistor uye yeNPN-mhando transistor. Mufananidzo 2 Kana thyristor iine iyo yakanaka anode voltage, kuitira kuti thyristor iitise mhangura, iyo PN junction J2 iyo inotakura iyo reverse voltage inofanirwa kurasikirwa neyakavharidzira mhedzisiro. Muunganidzi wazvino we transistor yega yega mumufananidzo iriwo hwaro hwazvino hweimwe transistor.

Naizvozvo, kana paine gedhi rakaringana razvino Ig rekuyerera mumasekiti maviri eesistimendi akasanganiswa, mhinduro yakanaka ichaumbwa, zvichikonzera kuti ma transistors maviri azadziswe uye kuitisa, uye ma transistors akazara uye kuitisa. Ngatiti muteresi wazvino wePNP chubhu uye iyo NPN chubhu inoenderana neIc1 uye Ic2; iyo emitter yazvino inoenderana naIa naIk; iko kuita kwekuwedzera kwekukwikwidzana kunoenderana ne a1 = Ic1 / Ia uye a2 = Ic2 / Ik, uye danho rekumashure richiyerera nemumugwagwa weJ2 Ikozvino kuburitsa iri Ic0, uye anode yazvino ye thyristor yakaenzana nechiyero chemutori wazvino uye yadeuka yazvino machubhu maviri: Ia = Ic1 Ic2 Ic0 kana Ia = a1Ia a2Ik Ic0 Kana gedhi razvino riri Ig, iyo thyristor cathode yazvino iri Ik = Ia Ig, nekudaro Inogona kugumiswa kuti anode yazvino ye thyristor iri : I = (Ic0 Iga2) / (1- (a1 a2)) (1-1) Izvo zvinoenderana nemaexplation coefficients a1 uye a2 yesilicon PNP chubhu uye nesilicon NPN chubhu zvakaenzana kune emitter yazvino Shanduko uye shanduko yakapinza zvinoratidzwa mumufananidzo 3.

Kana iyo thyristor yakaiswa kune yakanaka anode voltage uye gedhi harisi pasi pemagetsi, mufomula (1-1), Ig = 0, (a1 a2) idiki kwazvo, saka anode yazvino ye thyristor Ia≈Ic0 uye iyo thyristor yakavharwa pane yakanaka Kune inovhara nyika. Kana thyristor iri pane yakanaka anode voltage, iyo yazvino Ig inoyerera ichibva pagedhi G. Sezvo iyo Ig yakakura zvakakwana ichiyerera nepakati peNPN tube’s emission junction, yekutanga yazvino yekukudziridza chinhu a2 yakawedzerwa, uye yakakura zvakakwana electrode yazvino Ic2 inoyerera nepakati iyo PNP chubhu. Izvo zvinowedzerawo izvozvi izvo zvinokudziridza chinhu a1 yePNP chubhu, uye inogadzira yakakura electrode yazvino Ic1 inoyerera ichidarika nemitter emitter yeiyo NPN chubhu.

Yakasimba yakasimba mhinduro mhinduro inoenderera nekukurumidza.

Kana a1 uye a2 zvikawedzera ne emitter yazvino uye (a1 a2) ≈ 1, dhinomineta 1- (a1 a2) ≈ 0 mufomula (1-1), zvichidaro ichiwedzera anode yazvino Ia ye thyristor. Panguva ino, inoyerera nepakati Iyo yazvino ye thyristor inogadziriswa zvizere neiyo voltage yedunhu hombe uye kupokana kwedunhu. Iyo thyristor yatove pamberi yekuitisa nyika. Mune fomula (1-1), mushure mekunge thyristor yakavhurwa, 1- (a1 a2) -0, kunyangwe kana gedhi razvino Ig = 0 panguva ino, thyristor inogona kuramba iine yekutanga anode yazvino Ia uye ichiramba ichiitisa .

Mushure mekunge thyristor yakavhurwa, gedhi rarasikirwa nebasa. Mushure mekunge thyristor yakavhurwa, kana magetsi emagetsi achiramba achidzikiswa kana kuramba kwechiuno kuchiwedzerwa kudzikisa anode yazvino Ia kusvika pazasi pekuchengetedza ikozvino IH, nekuti a1 uye a1 inodonha nekukurumidza, kana 1- (a1 a2) ≈ 0 , Iyo thyristor inodzokera kune inovhara nyika.