Nguwuphi uMahluko phakathi kweVFD kunye neSoft Starter?

I-VFD kunye nesiqalisi esithambileyo sinokwenza imisebenzi ethelekisayo xa kufikwa ekunyuseni okanye ezantsi kwinjini. Olona tshintsho luphambili phakathi kwezi zimbini kukuba i-VFD inokwahlula isantya semoto nangona isiqalisi esithambileyo silawula kuphela ukuqala kunye nokumiswa kwaloo moto.

Xa ujongene nesicelo, ixabiso, kunye nobukhulu bukwimbeko yesiqalisi esithambileyo. I-VFD lolona khetho lusebenzayo ukuba ulawulo lwesantya lubalulekile. Kufanelekile ukufumana umenzi othembekileyo oqalayo othambileyo wokuthenga imveliso esemgangathweni yesicelo sakho. Apha ngezantsi, ndiza kwabelana ngomahluko phakathi kweVFD kunye nesiqalisi esithambileyo esiya kukunceda uqonde ukuba sesiphi isixhobo onokusifuna.

Yintoni i-VFD?

I-VFD imele ngokubanzi i-variable frequency drive edla ngokusetyenziselwa ukuqhuba i-AC motor ngezantya eziguquguqukayo. Ngokusisiseko basebenza ngokulungelelanisa ukuphindaphinda kwemoto ukulungelelanisa iirampu.

Yintoni iSoft Starter?

Amaqhinga ayafana kuba athetha ukuqala kunye nokumiswa kweenjini zokuvelisa kodwa zineempawu ezahlukileyo.

Ngokuqhelekileyo zisetyenziswa kwizicelo apho kukho ukungena okukhulu kwangoku okunokuthi konakalise i-motor ngelixa i-VFD ilawula kwaye inokohlula ukukhawuleza kwemoto.

• Ukusebenza kwangaphakathi kweSiqalisi esithambileyo

I-3-phase soft stater isebenzisa i-thyristors ezintandathu okanye i-silicon-controlled rectifiers, egxile kwi-anti-parallel formation ukuze udibanise iimotor zombane ngokulula.

I-thyristor yenziwe ngamacandelo amathathu:

• Isango lokuqiqa
• Cathode
• Anode

Xa i-pulse yangaphakathi isetyenziselwa isango, ivumela ukukhukuliseka ngoku ukusuka kwi-anode ukuya kwi-cathode ethi emva koko iqondise ngoku ngaphandle kwi-motor.

Xa ii-pulses zangaphakathi zingafaki esangweni, i-SCRs (I-Silicon Controlled Rectifier) ​​ikwimeko engaphandle kwaye ke ivalela umsinga kwi-motor.

Ezi pulses zangaphakathi zinqumla amandla ombane asetyenzisiweyo kwi-motor ehlayo ehlayo. Iipulses zithunyelwa zisekelwe kwixesha lokuthambekela ngoko ke umsinga uya kusetyenziswa ngokuthe ngcembe kwi-motor. Injini iya kuqalisa ngesantya esithe tyaba sangoku kwaye phezulu ngaphandle ngesantya esimiselweyo.

Imoto iya kuhlala kobo kukhawuleza ude uyeke imotor apho isiqalisi esithambileyo siya kuthambeka ezantsi injini ngendlela efanayo nokuphucula.

• Ukusebenza kwangaphakathi kweVFD

I-VFD inamacandelo amathathu, kuquka:

• Umlungisi
• Hluza
• Inverter

Isilungisi sisebenza njenge diode, sifumana ingeniso amandla ombane angaphakathi e-AC kwaye ayitshintshe kumbane we-DC. Kwaye isihluzi sisebenzisa ii-capacitors ukucoca i-voltage ye-DC iyenza ibe namandla okufika alula.

Okokugqibela, i-inverter isebenzisa ii-transistors ukutshintsha i-voltage ye-DC kwaye yalathisa i-motor kwi-frequency e-Hertz. La manyathelo okuqala emoto ukuya kwi-RPM echanekileyo. Unokuseta i-gradient phezulu kunye namaxesha asezantsi ngokufanayo kwisiqalisi esithambileyo.

I-VFD okanye i-Soft Starter? Eyiphi Ofanele Uyikhethe?

Kwinto osandul' ukuyigubungela; unokubona ukuba i-VFD isisiqalisi esithambileyo esinolawulo lwesantya. Ke uhlula njani ukuba sesiphi isixhobo esifunekayo kwisicelo sakho?

Ukukhetha ukuba sesiphi isixhobo osikhethayo kwehla ekubeni ingakanani na irheostat isicelo sakho esibandakanya. Kukho ezinye iimpawu onokuthi uzenze ngabom kwisigqibo sakho.

• Ulawulo lwesantya: Ukuba isicelo sakho sidinga ukungena ngamandla ngoku kodwa asifuni ulawulo lwesantya, ke isiqalisi esithambileyo yeyona ndlela iphezulu. Ukuba isantya se-rheostat siyafuneka, ngoko i-VFD ibalulekile.
• Ixabiso: Ixabiso linokuba yinto echazayo kwizicelo ezininzi zehlabathi lokwenyani. Okwangoku, umqalisi othambileyo uneempawu zolawulo ezinqabileyo, ixabiso lingaphantsi kweVFD.
• Ubungakanani: Okokugqibela, ukuba ubungakanani besixhobo sakho bunempembelelo ecacileyo, iziqalisi ezithambileyo zihlala zincinci kuneeVFD ezininzi. Ngoku, makhe sijonge ungeniso lwehlabathi lokwenyani ukukunceda ubone utshintsho phakathi kweVFD kunye nesiqalisi esithambileyo.

Olu lwazi lukhankanywe ngasentla luya kukunceda ekwahluleleni umahluko phakathi kweVFD kunye nesiqalo esithambileyo. Ungafumana enye yezona mveliso zibalaseleyo zokuqalisa iimoto eTshayina, okanye kwenye indawo, ukuthenga iimveliso ezikumgangatho ophezulu ngamaxabiso afanelekileyo.