Hanyar zaɓi na girman ƙarfin wutar lantarki mai asynchronous mataki uku

Fitowar ta Motar asynchronous mai hawa ukuya kamata a zaba bisa ga ikon da injin samarwa ke buƙata, kuma motar asynchronous mai hawa uku ya kamata a yi aiki a ƙarƙashin ƙimar ƙima gwargwadon iko. Lokacin zabar girman ƙarfin motar, manufar ya kamata ta dace.

Game da hanyar zaɓin girman girman ikonAsynchronous induction ACmotor mai kashi uku.

Zaɓin motar asynchronous mai mataki uku tare da ƙarfin da ya dace ba zai lalata wutar lantarki ba kuma ba zai yi nauyi da injin na dogon lokaci ba. Idan ƙarfin motar yayi ƙasa da ƙasa. Lamarin "kananan karusar" yana faruwa, yana haifar da yin lodin injin na dogon lokaci, yana haifar da lalacewa ta hanyar zafi. Ko da motar ta ƙone, idan ƙarfin motar ya yi girma sosai, abin "babban marathon" zai faru. Za a iya amfani da ƙarfin fitar da injinsa gabaɗaya, ƙarfin wutar lantarki da ƙarfin ba su da yawa, kuma yana samar da makamashin lantarki.

Hanyar 1: Yi amfani da dabarar don ƙididdige ikon da injin asynchronous mai kashi uku ke buƙata:

1. Don hanyar ci gaba da aiki, an san ikon ɗaukar nauyi (wato, ikon da ke kan injin injin) Pl (kW). Ana iya amfani da wannan dabarar don ƙididdige ƙarfin P (kW) na motar: P=P1/n1 n2 Inda n1 shine ƙarfin injin samarwa kuma n2 shine ƙarfin motar. Wannan shine ikon watsawa.

Bisa ga ikon da aka samu ta hanyar dabarar da ke sama, saboda wutar lantarki da sauransu ba sa buƙatar zama daidai sosai, kuma asarar makamashi na inji yana da wasu ma'auni, ƙarfin da aka zaɓa na motar da aka zaɓa ya kamata ya zama daidai ko dan kadan fiye da karfin da aka ƙidaya.

Idan aninjin lantarki tare da ikon 0.8 an zaɓi, gwada ƙoƙarin gano yawan kilowatts na motar ya kamata ya zama. Magani: P = P1 / n1n2 = 3.95 / 0.7 * 0.8 = 7.1kW Tun da babu ƙayyadaddun 7.1kW, an zaɓi motar asynchronous mai hawa uku na 7.5kW.

2. Motar aiki na ɗan gajeren lokaci. Idan aka kwatanta da motar tare da irin ƙarfin da aka ƙididdigewa yayin ci gaba da aiki. Ƙananan abubuwan haɗin gwiwa, babban madaidaicin juzu'i, da ƙarancin farashi. Idan sharuɗɗa sun ba da izini, ya kamata a zaɓi motar asynchronous mai mataki uku tare da ƙimar ɗan gajeren lokaci na S2 gwargwadon yiwuwa.
3. Don injunan asynchronous mai kashi uku tare da ƙimar aiki ta S3, zaɓi girman fitarwa. Dangane da girman nauyin ɗigon kaya, an zaɓi motar asynchronous mai hawa uku tare da tsarin aiki na S3, wanda aka yi amfani da shi musamman don aiki na ɗan lokaci. Ƙididdigar ƙididdiga don nauyin Fs% ci gaba shine Fs% = tg / (Tg + zuwa) × 100%, inda Tg shine lokacin aiki (naúrar: min), t shine ƙarfin dakatarwa (naúrar: min); Tg goma zuwa shine lokacin zagayowar (raka'a: min)

Hanyar 2: Yi amfani da hanyar siminti don zaɓar ƙarfin injin asynchronous mai mataki uku. Abin da ake kira kwatankwacin, wanda yayi daidai da aikin injin asynchronous mai kashi uku da ake amfani da shi a cikin injinan samarwa iri ɗaya.

Takamammen hanyar ita ce: fahimtar ikon da injinan samarwa iri ɗaya ke cinyewa kusa da wannan rukunin ko wasu raka'a, sannan zaɓi injinan da ke kusa don aikin gwaji. Ana yin aikin gwaji don bincika ko motar da aka zaɓa ta dace da injin samarwa. Hanyar tabbatarwa ita ce: sanya hoist ɗin lantarki ya motsa injin samarwa don aiki. Yi amfani da ammeter manne don auna aikin halin yanzu na injin asynchronous mataki uku, kuma kwatanta sakamakon auna tare da ƙimar halin yanzu da aka ƙayyade akan farantin sunan motar.

Hanyar 3: Hanyar kimantawa ta dace:

1. Idan ainihin halin yanzu na injin ɗin bai karkata ba sosai daga na yanzun da aka nuna. Wannan yana nuna cewa aikin injin da aka zaɓa ya isa.
2. Idan ainihin halin yanzu na injin yana da kusan 70% ƙasa da ƙimar halin yanzu da aka ƙayyade akan farantin suna. Sa'an nan kuma yana nuna cewa ƙarfin motar ya yi yawa (watau "babban karusa" ya kamata a maye gurbinsa da mota mai ƙananan iko).
3. Idan ma'aunin injin da ke aiki a halin yanzu ya fi 40% sama da ƙimar wutar lantarki da aka ƙayyade akan farantin suna. Wannan yana nuna cewa ƙarfin motar ya yi ƙasa sosai (watau "ƙananan karusa"), wato, ya kamata a canza babbar motar wuta.