Kodi mukufuna kudziwa zambiri za ntchito yaBraking Resistormu frequency converter?
Ngati inde, chonde onani zomwe zili pansipa.
Mumayendedwe oyendetsa pafupipafupi, mota imachepetsedwa ndikuyimitsidwa ndikuchepetsa pang'onopang'ono. Panthawi yochepetsera mafupipafupi, kuthamanga kwa injini kumachepa, koma chifukwa cha inertia yamakina, kuthamanga kwa injini ya rotor sikunasinthe. Popeza mphamvu ya dera la DC silingabwezedwe ku gridi kudzera pa mlatho wokonzanso, imatha kudalira chosinthira pafupipafupi (otembenuza pafupipafupi amatenga gawo la mphamvu kudzera pa capacitor yake). Ngakhale zida zina zimagwiritsa ntchito mphamvu, capacitor imakumanabe ndi nthawi yayitali, ndikupanga "boost voltage" yomwe imawonjezera magetsi a DC. Kuchuluka kwamagetsi a DC kumatha kuwononga zinthu zosiyanasiyana.
Choncho, pamene katundu ali mu jenereta boma braking, miyeso zofunika ayenera kuchitidwa kusamalira mphamvu regenerative izi. The crane resistor mu dera nthawi zambiri amatenga gawo la voltage divider ndi shunt pano. Pazizindikiro, ma sign a AC ndi DC amatha kudutsa zopinga.
Pali njira ziwiri zothanirana ndi mphamvu yobwereranso:
1. Mphamvu yogwiritsira ntchito mphamvu ya braking Mphamvu yogwiritsira ntchito mphamvu ndi kuwonjezera gawo la discharge resistors pa mbali ya DC ya ma frequency drive drive kuti muwononge mphamvu yamagetsi yosinthidwanso mu chopinga chamagetsi kuti chiwonjezeke. Iyi ndi njira yothanirana ndi mphamvu zotsitsimutsa mwachindunji, pamene zimadya mphamvu zowonongeka ndikuzitembenuza kukhala mphamvu ya kutentha kupyolera mu dera lodzipereka logwiritsa ntchito mphamvu zowonongeka. Chifukwa chake, imatchedwanso "resistance braking", yomwe imakhala ndi ma braking unit ndi abraking resistor.Braking unit Ntchito ya braking unit ndi kuyatsa mphamvu yogwiritsira ntchito mphamvu pamene DC circuit voltage Ud idutsa malire otchulidwa, kotero kuti dera la DC limatulutsa mphamvu mu mawonekedwe a kutentha kupyolera muzitsulo za braking. Chotsutsa chokhala ndi kukana kosalekeza chimatchedwa chotsutsa chokhazikika, ndipo chotsutsa chokhala ndi kusinthasintha kosiyana chimatchedwa potentiometer kapena variable resistor kapena Rheostat.
2.Braking mayunitsi akhoza kugawidwa mu anamanga-mkati ndi kunja mitundu. Yoyamba ndi yoyenera ma drive a frequency frequency amphamvu otsika, ndipo yotsirizirayi ndi yoyenera ma drive ama frequency amphamvu kwambiri kapena zofunikira zapadera zama braking. Kwenikweni, palibe kusiyana pakati pa ziwirizi. Onsewa amagwiritsidwa ntchito ngati "ma switch" olumikizira ma braking resistors, ndipo amapangidwa ndi ma transistors amagetsi, ma sampling amagetsi ndi mabwalo ofananiza ndi mabwalo oyendetsa.
Braking resistor imagwira ntchito ngati sing'anga kuti mphamvu yobwezeretsanso injini itayike ngati mphamvu ya kutentha, ndipo imaphatikizapo magawo awiri ofunikira: kukana mtengo ndi mphamvu yamagetsi. Mitundu yomwe imagwiritsidwa ntchito kwambiri mu engineering imaphatikizapo ripple resistors ndi aluminium (Al) alloy resistors. Yoyamba imagwiritsa ntchito lalanje woyima kuti ipititse patsogolo kutentha, kuchepetsa kutsekemera kwa parasitic, ndipo imagwiritsa ntchito zokutira zopingasa kwambiri komanso zosagwira moto kuti ziteteze bwino waya wokana kukalamba ndikukulitsa moyo wake wautumiki. Kukaniza kwanyengo komaliza komanso kukana kugwedezeka kuli bwino kuposa zopinga zachikhalidwe za ceramic, ndipo zimagwiritsidwa ntchito kwambiri m'malo ovuta kuwongolera mafakitale okhala ndi zofunikira zapamwamba. Ndiosavuta kuyika mwamphamvu ndipo imatha kukhala ndi masinki owonjezera otentha (kuchepetsa kutentha komwe kumapangidwa panthawi yogwiritsira ntchito chipangizocho), kupereka mawonekedwe owoneka bwino.
