Kulamulira liwiro losinthira pafupipafupi nthawi zambiri kumatanthauza dongosolo lamagetsi lotere: injini yolowetsa liwiro losinthira pafupipafupi, chosinthira pafupipafupi, chowongolera chosinthika ndi zida zina zanzeru, ma actuator a terminal ndi mapulogalamu owongolera, ndi zina zotero, zimapanga dongosolo lolamulira liwiro la AC lotseguka kapena lotsekedwa. Mtundu uwu wa dongosolo lowongolera liwiro ukuloŵa m'malo mwa dongosolo lachikhalidwe lowongolera liwiro la makina ndi dongosolo lowongolera liwiro la DC mumkhalidwe wosayembekezereka, zomwe zimakweza kwambiri kuchuluka kwa makina odziyimira pawokha komanso magwiridwe antchito opangira, ndikupangitsa zidazo kukhala zazing'ono komanso zanzeru kwambiri.
Poganizira momwe ma mota onse amagwiritsidwira ntchito mphamvu m'mafakitale, pafupifupi 70% ya ma mota amagwiritsidwa ntchito mu mafani ndi mapampu. Ubwino wosunga mphamvu ndi kuchepetsa utsi wa zinthu zotere ndi wodziwikiratu: ubwino waukulu wazachuma komanso zotsatira zokhazikika pagulu. Kutengera cholinga chomwe chili pamwambapa, malamulo osinthira liwiro la ma frequency a AC motor amagwiritsidwa ntchito kwambiri. Mwachitsanzo, mu inverter air conditioner, kutentha komwe kumayikidwa ndi air conditioner kumatsika, ndikofunikira kungowongolera liwiro la mota kuti muchepetse ndikuchepetsa mphamvu yoyendetsera yotulutsa.
Kuwonjezera pa kusunga mphamvu komanso kukhala kosavuta kutchuka ndikugwiritsa ntchito, ma mota a asynchronous omwe amalamulira liwiro losinthasintha ali ndi ubwino woyambira mofewa, ndipo palibe chifukwa chowunikira momwe amayambira. Vuto lokhalo lomwe likufunika kuthetsedwa ndilakuti: kusinthasintha kwa mota ku mphamvu ya mafunde osakhala a sine kuyenera kukonzedwa.
Mfundo yogwirira ntchito ya Frequency Converter
Chosinthira ma frequency chomwe timagwiritsa ntchito makamaka chimagwiritsa ntchito njira ya AC-DC-AC (kusintha ma frequency a VVVF kapena kusintha ma frequency a vector). Choyamba, mphamvu ya AC ya ma frequency imasinthidwa kukhala mphamvu ya DC kudzera mu rectifier, kenako mphamvu ya DC imasinthidwa kukhala AC yokhala ndi ma frequency ndi voltage yowongolera kuti ipereke mota. Dera la frequency converter nthawi zambiri limapangidwa ndi magawo anayi: kukonzanso, kulumikizana kwapakati kwa DC, inverter ndi control. Gawo lokonzanso ndi rectifier yosalamulirika ya mlatho wa magawo atatu, gawo la inverter ndi inverter ya mlatho wa magawo atatu wa IGBT, ndipo zotuluka ndi PWM waveform, ndipo ulalo wapakati wa DC ndi wosefa, DC energy storage ndi buffering reactive power.
Kuwongolera ma frequency kwakhala njira yodziwika bwino yowongolera liwiro, yomwe ingagwiritsidwe ntchito kwambiri poyendetsa ma stepless transmission m'mafakitale osiyanasiyana. Makamaka chifukwa cha kugwiritsa ntchito ma frequency converters m'munda wa mafakitale, kugwiritsa ntchito ma frequency converter motors kwafalikira kwambiri. Tikhoza kunena kuti chifukwa cha kupambana kwa ma frequency converter motors mu frequency converter control kuposa ma motors wamba, kulikonse komwe ma frequency converter amagwiritsidwa ntchito, sizovuta kuwona chithunzi cha ma frequency converter motors.
Mayeso a mota ya ma frequency variable nthawi zambiri amafunika kuyendetsedwa ndi chosinthira ma frequency. Popeza ma frequency output frequency converter ali ndi mitundu yosiyanasiyana, ndipo mafunde a PWM output ali ndi ma harmonics ambiri, transformer yachikhalidwe ndi mita yamagetsi sizingakwaniritsenso zosowa za muyeso wa mayesowo. Chowunikira mphamvu yosinthira ma frequency ndi chosinthira mphamvu yosinthira ma frequency, ndi zina zotero.
Benchi yoyesera ya mota yokhazikika ndi mtundu watsopano wa makina oyesera omwe adayambitsidwa kuti akwaniritse dongosolo lowongolera mphamvu zamagalimoto poyankha kusunga mphamvu ndi kuchepetsa utsi. Benchi yoyesera ya mota yokhazikika imasintha ndikugwiritsa ntchito makina ovuta, imawongolera kudalirika kwa makinawo, imapangitsa kuti njira yokhazikitsa ndi kukonza zolakwika zikhale zosavuta, komanso imachepetsa mtengo wa makinawo.
Mawonekedwe apadera a injini yosinthira pafupipafupi
Kapangidwe ka kukwera kwa kutentha kwa Class B, kupanga zotetezera kutentha za Class F. Kugwiritsa ntchito zipangizo zotetezera kutentha za polymer ndi njira yopangira varnish yokhala ndi varnish yothira mphamvu ya vacuum komanso kugwiritsa ntchito kapangidwe kapadera ka zotetezera kutentha kumapangitsa kuti zotetezera kutentha zamagetsi zizitha kupirira magetsi ndi mphamvu zamakanika, zomwe zimakwanira kugwira ntchito mwachangu kwa mota komanso kukana mphamvu yamagetsi yamagetsi ndi magetsi a inverter. Kuwonongeka kwa zotetezera kutentha.
Mota yosinthira ma frequency ili ndi khalidwe labwino kwambiri, ndipo mulingo wa kugwedezeka ndi R-level. Kulondola kwa makina a zida zamakanika ndi kwakukulu, ndipo ma bearing apadera olondola kwambiri amagwiritsidwa ntchito, omwe amatha kuthamanga mwachangu.
Mota yosinthira ma frequency imagwiritsa ntchito njira yokakamiza yopumira mpweya komanso yotaya kutentha, ndipo mafani onse oyenda a axial ochokera kunja ndi chete kwambiri, amakhala nthawi yayitali, komanso ndi mphepo yamphamvu. Zimatsimikizira kuti kutentha kwa mota kumataya mofulumira kwambiri, ndipo zimagwira ntchito nthawi yayitali mwachangu kapena pang'onopang'ono.
Poyerekeza ndi mota yachikhalidwe yosinthasintha ma frequency, ili ndi liwiro lalikulu komanso kapangidwe kake kapamwamba. Kapangidwe kake kapadera ka maginito kamalepheretsanso mphamvu ya maginito yapamwamba kuti ikwaniritse zizindikiro za kapangidwe ka broadband, kusunga mphamvu komanso phokoso lotsika. Ili ndi mitundu yosiyanasiyana ya machitidwe olamulira liwiro la mphamvu ndi mphamvu, malamulo okhazikika a liwiro, komanso opanda ma ripple a torque.
Ili ndi ma parameter ofanana bwino ndi ma frequency converters osiyanasiyana. Pogwirizana ndi vector control, imatha kukwaniritsa zero-speed full torque, low-frequency high-torque komanso high-precision speed control, position control ndi fast dynamic response control.
Nthawi yotumizira: Disembala-05-2023