Kwatanta Amfani da Makamashin Ruwayoyi daban -daban da ake Amfani da su a Tsarin Matsakaicin Matsakaici (MF) don ƙirƙirar

Mista Zeng xiaolin ne ya rubuta daga CHENGDU DUOLIN ELECTRIC CO., LTD

Wannan labarin yana nazarin raunin tsarin SCR MF Induction Heating System na yau da kullun kuma yana gabatar da sabon nau'in MF Induction Heating System don ƙirƙira tare da na'urorin wutar lantarki na IGBT. Circuit Resonant Circuit ne tare da fasalulluka mahimmancin tasirin ceton makamashi kuma ana iya ƙaddamar da shi cikin sauƙi a kowane yanayi na kaya.

A halin yanzu, yawancin masana'antun suna amfani da su LC Parallel Resonant Circuit da SCR azaman inverter don MF su Tsarin Dumama Induction. Irin wannan fasahar inverter na SCR an haɓaka shi a farkon 70s na ƙarni na ƙarshe. Da fatan za a ganiDzanen 1!

. SCR LC Daidaitaccen Resonant Circuit

Dzanen 1

A cikin wannan nau'in da'irar, sashin gyara yana yin ayyuka biyu:

1. To canza AC a halin yanzu zuwa DC na yanzu ta hanyar SCR guda shida (mai sarrafa madaidaicin silicon).

2. Zuwa daidaita ikon injin.

Rashin amfani da wannan da'irar:

1. Ƙari zuba jari a Capacitor Mai Ba da Lamuni na Ƙarfin Wuta Majalisar (PFCCC).

Ana samun daidaiton wutar lantarki ta hanyar daidaita kusurwar sarrafawa na SCR, kuma rage kusurwar madaidaicin zai rage ƙarfin wutar lantarki. Don haka masu amfani dole ne su sayi Majalissar Ma'aikata Mai Rarraba Ƙarfin Ƙarfin Wuta. Sannan farashin ya ƙaru.

2. Ƙasa ikon factor

Ƙarfin ƙarfin shine kawai 0.8 zuwa 0.85 a cikin sashin inverter saboda kashe-kashe na SCR.

3. Babba makamashi amfani

l Bayan gyare -gyare, ana yin tace DC ta babban firikwensin DC. Ta haka1% -3% asarar makamashi ana yin sa a wannan sashe.

l Inverter kewaye yana cika ta Thyristors (SCR) guda huɗu, don haka game da 5% makamashi asara an samar dashi a sashin inverter.

l Sashin fitarwa shine madaidaiciyar madaidaiciyar madaidaiciyar madaidaiciya wacce ta ƙunshi murfin shigarwa da haɓakawa. An iyakance ta rushewar wutar lantarki na SCR, fitowar wutar lantarki ≤750V. Haɗin oscillation yanzu a murfin shigarwa shine Q (5 zuwa 10) lokutan DC na yanzu (Q shine ƙimar inganci na kewaya resonant.). Don haka akwai asarar makamashi da yawa a murfin shigar. Don haka tare da madaidaiciyar madaidaiciyar da'ira, theasarar makamashi shine kimanin 25% zuwa 30% na karfin injin.

Tsaboda haka ingancin SCR MF Induction Hcin abinci Tsarin yana kusan 60% zuwa 70%.

A bayyane yake, ɗaga ƙarfin lantarki akan murfin shigarwa kuma rage ƙimar kewayawa na Q wanda zai iya inganta ingancin injin. Amma a cikin madaidaiciyar madaidaiciyar madaidaiciya, duka ƙarshen murfin shigar da kai tsaye da aka haɗa da thyristor, idan ya ɗaga ƙarfin wutan lantarki, dole ne a ɗaga ƙarfin wutar lantarki na thyristors. Don haka haɓaka ƙarfin wutar lantarki na thyristors zai haɓaka farashin kayan masarufi amma kuma ƙuntatawa ta lalacewar wutar lantarki ta thyristor.

Thyristor shine na'urar sarrafa nau'in nau'in sarrafawa mai sarrafa kansa, lokacin ƙimar kewayon ƙima Q <10, mai sauƙin dakatar da karkacewa ko gazawar oscillation.

Mutane sun yi amfani da tsarin dumama SCR MF Induction sun san gaskiya idan tashar dumama ta cika kayan sanyi; yana da wuya a fara karkatawa. Don haka don inganta ingancinFarashin MF dumama tsarin dole ne ya nemi wata na'urar wuta da wani da'irar: IGBT da LC Jerin Resonant Da'irar. Da fatan za a ganiZane 2 a ƙasa!

. Farashin IGBTJerin Resonant Circuit

—–amfani dashi Duolin MF Induction Tsarin Dumama

A farkon shekarun 90, an haifi sabon na'urar IGBT da fasali na babban iko, low canji hasara kuma babba aiki mita har zuwa 100 kHz. Fasahar IGBT ta balaga sosai bayan shekaru 20 na ci gaba, musamman ƙarni na huɗu IGBT da INFINEON ya yi. Ƙarfin ƙarfinsa shine ≤ 1.7 yayin da Maɗaukaki mai sauyawa ya kai 20KHZ. IGBT cikakken iko ne a fannoni kamar inverter mai canzawa, sauya wutar lantarki da dumama shigar.

Dijara 2

A cikin wannan da'irar, ana yin gyara kai tsaye ta hanyar diodes shida (6) ba tare da sara ba don haka ana rage tasirin tasirin wutar lantarki. A cikin jerin abubuwan sake kunnawa, aikin tacewa ana yin shi ta hanyar capacitor C1 maimakon babban da mai ɗaukar nauyi don cimma ceton makamashi. SCR T1 anan yana aiki azaman mai sauyawa kawai. Lokacin da aka caje capacitor zuwa wani ƙarfin lantarki, ana haɗa SCR T1.

Sashin inverter ya ƙunshi IGBT guda huɗu (4). Rashin asarar IGBT daidai yake da SCR amma asarar IGBT ta canza ƙasa da SCR don haka asarar inverter na yanzu yayi ƙasa, kusan kashi 3%.

Akwai hanyoyi biyu na daidaita wutar lantarki: 1. ta hanyar canza mitar aiki na sashin inverter; 2. ta hanyar canza lokacin gudanar da IGBT.

Sashin fitarwa shine Series Maɗaukaki Circuit wanda ya ƙunshi inductor (L) da capacitor (C). Halin wannan da'irar ita ce halin yanzu ta hanyar IGBT yayi daidai da na yanzu ta hanyar inductor da capacitor amma ƙarfin lantarki a inductor shine lokutan 3-10 (Q ƙimar) sauye-sauyen ƙarfin wutar lantarki na DC. Ana ba da wutar lantarki a cikin inductor (L) kai tsaye ta hanyar capacitor (C), don haka babu buƙatar tayar da ƙarfin wutar lantarki na na'urorin wutar lantarki (IGBT) lokacin haɓaka ƙarfin lantarki a inductor.

Ƙarfi a inductor P = V (ƙarfin lantarki a inductor) × I (na yanzu ta hanyar inductor) .Yanzu bari mu kwatanta asara a inductor tsakanin Daidaici da Jerin resonant kewaye. Tsammani ikon a inductor shine P.

Daidaitaccen Resonant Circuit (prc): P = Vprc × Inaprc; P = 750 × Inaprc; Niprc= P/750

Circuit Resonant Circuit (src): P = Vsrc × Inasrc; P = 1500 × Inasrc; Nisrc= P/1500 (mafi ƙarancin Vsrc = 3 DC 500 DC Vol)

Don haka nisrc = 1/2 I prc; mun san asarar inductor yana da alaƙa da juriya na inductor. Ana ɗaukar juriya R, to asarar wutar ita ce:

P = Ina2R; Pprc = Inaprc2R; Psrc = Inasrc2 R = (1/2 Iprc)2 R = 1/4 Iprc2 R

Fa'idodi na wannan da'irar ko tsarin dumama shigar MF na Duolin:

1. Babba inganci

Saboda haka a ƙarƙashin yanayin ƙarfi iri ɗaya da mai jawo iri ɗaya, matsakaicin asarar Series Resonant inductor shine kwata (1/4) na Parallel Resonant inductor (Da fatan a duba sama dabara!). Sannan asarar sashin fitowar jerin jerin shine kusan 5% - 10% na ikon injin, don haka ingancin tsarin MF Induction Heating System da aka yi amfani da Circuit Resonant Circuit shine 80% - 90%.

2. Ƙarancin kuzari

A cikin Circuit Resonant Circuit, ƙarfin lantarki a cikin inductor baya da alaƙa da rushewar wutar lantarki. Don haka muddin an ba da rufin inductor, don haɓaka ƙarfin lantarki a inductor na iya rage asarar inductor, ƙara inganta ingancin injin. Ka'idar daidai take da watsa wutar lantarki a cikin babban ƙarfin lantarki.

Sabili da haka, lokacin ƙira, zaɓi ƙimar Q daidai wanda zai iya ba da tabbacin amincin injin tare da haɓaka ingancin injin, sannan kuma yana iya mahimmanci ajiye makamashi 10% -30% can ɓoye shi tare da tsarin thyristor na al'ada (SCR) tsarin dumama.

3. Babba ikon factor

Yawancin lokaci MF Induction System Heating System tare da IGBT Series Resonant Circuit yana da babban ƙarfin wutar lantarki sama da 0.95. Idan gyara tare da bugun jini 12, ƙarfin wutar lantarki na iya zama har zuwa 0.98.

4. Sauki don ƙaddamarwa a kowane yanayin kaya

IGBT cikakkiyar na'urar sarrafa wutar lantarki ce. Ana kunna/kashe IGBT ana sarrafa shi kai tsaye ta ƙofar ba tare da wata alaƙa da ƙarfin wutar lantarki da ƙimar ƙimar oscillation circuit. Don haka ana iya ƙaddamar da injin cikin sauƙi a kowane yanayin kaya.

Ko ta yaya MF Induction System Heating System tare da IGBT Series Resonant Circuit shine mafi kyawun zaɓi na kamfanonin ƙirƙira.


Lokacin aikawa: Feb-04-2021