Kodi Kusiyanitsa Pakati pa VFD ndi Soft Starter ndi Chiyani?

VFD ndi choyambira chofewa zimatha kugwira ntchito zofananira zikafika pakukweza kapena kutsitsa injini. Kusintha kwakukulu pakati pa ziwirizi ndikuti VFD imatha kupatutsa liwiro la mota ngakhale choyambira chofewa chimangoyang'anira kuyambitsa ndi kuyimitsa kwa injiniyo.

Mukayang'anizana ndi ntchito, mtengo, ndi kukula kwake zimaperekedwa ndi choyambira chofewa. VFD ndiye chisankho chothandiza kwambiri ngati kuwongolera liwiro ndikofunikira. Ndikwabwino kupeza wopanga zofewa zodalirika zogulira zinthu zabwino kwambiri pakugwiritsa ntchito kwanu. Pansipa, ndikugawana kusiyana pakati pa VFD ndi choyambira chofewa chomwe chingakuthandizeni kudziwa chipangizo chomwe mungafune.

Kodi VFD ndi chiyani?

VFD nthawi zambiri imayimira ma frequency frequency drive omwe amagwiritsidwa ntchito poyendetsa mota ya AC pa liwiro losiyanasiyana. Amagwira ntchito posintha ma frequency a mota kuti asinthe ma ramp.

Kodi Soft Starter ndi chiyani?

Njirazi ndizofanana chifukwa zimawonetsa kuyambitsa ndi kuyimitsa kwa injini zopangira koma zimakhala ndi mawonekedwe osiyanasiyana.

Nthawi zambiri amagwiritsidwa ntchito m'mapulogalamu pomwe pali kulowera kwakukulu komwe kumatha kuwononga mota pomwe VFD ikuwongolera ndikutha kusiyanitsa kuthamanga kwa injini.

• Ntchito Yamkati Yoyambira Yofewa

3-phase soft stater imagwiritsa ntchito ma thyristors asanu ndi limodzi kapena zowongolera zoyendetsedwa ndi silicon, zomwe zimayang'ana kwambiri mu anti-parallel mapangidwe kuti agwedeze ma mota amagetsi mosavuta.

Thyristor ili ndi magawo atatu:

• Chipata cha logic
• Cathode
• Anode

Pamene kugunda kwamkati kumagwiritsidwa ntchito kuchipata, kumapangitsa kuti pakhale kusuntha kuchokera ku anode kupita ku cathode yomwe imatsogolera panopa kupita ku injini.

Ma pulse amkati akapanda kulowa pachipata, ma SCRs (Silicon Controlled Rectifier) ​​ali patali ndipo amangoyika magetsi pagalimoto.

Ma pulse amkati awa amawongolera mphamvu yamagetsi yomwe imagwiritsidwa ntchito kupita ku injini yomwe ikutsika kwambiri. Ma pulses amatchulidwa mokhazikika pa nthawi yotsetsereka kotero kuti mphamvuyi idzagwiritsidwa ntchito pang'onopang'ono ku injini. Galimotoyo imayambira pa liwiro lathyathyathya komanso pamwamba kwambiri pa liwiro lodziwikiratu.

Galimotoyo imakhala yothamanga kwambiri mpaka mutayimitsa galimoto pamene choyambitsa chofewa chidzatsika pansi pa injiniyo mofanana ndi kukweza.

• Ntchito Yamkati ya VFD

VFD ili ndi zigawo zitatu, kuphatikiza:

• Wokonzanso
• Sefa
• Inverter

Zokonzanso zimagwira ntchito ngati ma diode, zimabweretsa mphamvu yamkati ya AC ndikuyisintha kukhala voteji ya DC. Ndipo fyulutayo imagwiritsa ntchito ma capacitor kuyeretsa voteji ya DC ndikupangitsa kuti ifike bwino.

Pomaliza, inverter imagwiritsa ntchito ma transistors kuti asinthe ma voliyumu a DC ndikuwongolera ma frequency ku Hertz. Ma frequency awa amapangitsa injini kukhala RPM yeniyeni. Mukhoza kukhazikitsa gradient mmwamba ndi downtimes mofanana ndi choyambira chofewa.

VFD kapena Soft Starter? Kodi Muyenera Kusankha Iti?

Kuchokera pa zomwe mwalemba; mutha kuzindikira kuti VFD nthawi zambiri imakhala yoyambira yofewa yokhala ndi liwiro. Ndiye mumasiyanitsa bwanji chipangizo chomwe chimafunikira pakugwiritsa ntchito kwanu?

Kusankha kwa chipangizo chomwe mumasankha kumatengera kuchuluka kwa rheostat yomwe pulogalamu yanu imakhudza. Palinso zinthu zina zomwe muyenera kuziganizira posankha.

• Kuwongolera Kuthamanga: Ngati pulogalamu yanu ikufunika kuthamangitsidwa kwakanthawi koma sakufuna kuwongolera liwiro, ndiye kuti choyambira chofewa ndiye njira yayikulu. Ngati liwiro la rheostat likufunika, ndiye kuti VFD ndiyofunikira.
• Mtengo: Mtengo ukhoza kukhala gawo lofotokozera m'mapulogalamu ambiri adziko lapansi. Pakadali pano, choyambira chofewa chimakhala ndi mawonekedwe osowa kwambiri, mtengo wake ndi wocheperako kuposa VFD.
• Kukula: Pomaliza, ngati kukula kwa chipangizo chanu ndi chikoka chofotokozera, zoyambira zofewa nthawi zambiri zimakhala zocheperako kuposa ma VFD ambiri. Tsopano, tiyeni tiwone zomwe zaperekedwa zenizeni kuti zikuthandizeni kuwona kusintha pakati pa VFD ndi choyambira chofewa.

Zomwe tatchulazi zidzakuthandizani kusiyanitsa kusiyana pakati pa VFD ndi choyambira chofewa. Mutha kupeza m'modzi mwa opanga zabwino kwambiri zoyambira zofewa ku China, kapena kwina kulikonse, kuti mugule zinthu zapamwamba kwambiri pamitengo yabwino.