Unoda kuziva zvakawanda nezvebasa reBraking Resistormune frequency converter?
Kana hongu, ndapota tarisa ruzivo rwuri pasi apa.
Mune inosiyana frequency drive system, mota inodzikiswa uye inomiswa nekudzikisa zvishoma nezvishoma frequency. Panguva yekudzikisa frequency, iyo synchronous kumhanya yemota inodzikira, asi nekuda kwemechini inertia, iyo mota rotor kumhanya inoramba isina kuchinjika. Sezvo simba redunhu reDC risingakwanisi kudzoserwa kugedhi kuburikidza nebhiriji rekugadziridza, rinogona kuvimba chete ne frequency converter (iyo frequency converter inotora chikamu chesimba kuburikidza neyayo capacitor). Kunyangwe zvimwe zvikamu zvichishandisa simba, iyo capacitor ichiri kusangana nepfupi-yenguva yekuchaja kuunganidzwa, kugadzira "boost voltage" inowedzera iyo DC voltage. Yakawandisa DC voltage inogona kukonzera kukuvadzwa kwezvinhu zvakasiyana.
Naizvozvo, kana mutoro uri mujenareta braking state, matanho anodiwa anofanira kutorwa kubata iri regenerative simba. Iyo crane resistor mudunhu inowanzoita basa remagetsi divider uye yazvino shunt. Kune masaini, ese ari maviri AC uye DC masaini anogona kupfuura nevanopikisa.
Pane nzira mbiri dzekugadzirisa simba regenerative:
1.Energy kushandiswa braking operation Kushandisa simba rekushandisa mabhureki ndiko kuwedzera discharge resistors component padivi reDC reiyo variable frequency drive kuti iparadze simba remagetsi rakagadziridzwa mumagetsi ekudzivirira mabhureki. Iyi inzira yekubata nekugadzirisa simba zvakananga, sezvo inodya simba rekugadzirisa uye inoshandura kuva simba rekupisa kuburikidza nemhepo yakatsaurirwa-inopedza braking circuit. Naizvozvo, iyo inonziwo "resistance braking", iyo inosanganisira braking unit uye abraking resistor.Braking unit Basa rechikwata chebhureki ndechekushandura simba rekushandisa simba apo DC circuit voltage Ud inodarika muganhu wakatarwa, kuitira kuti dhipatimendi reDDC rinobudisa simba mumhando yekupisa kuburikidza nebhureki rekudzivirira. Chidziviriro chinoramba chiripo chinodaidzwa kuti chidziviriro chakatsiga, uye chinopikisa chine kushanduka chinosiyana chinonzi potentiometer kana variable resistor kana Rheostat.
2.Braking units inogona kugoverwa kuva yakavakirwa-mukati uye kunze mhando. Iyo yekutanga inokodzera yakaderera-simba general dhizaini madhiraivha, uye iyo yekupedzisira yakakodzera kune yakakwirira-simba inosiyanisa frequency madhiraivha kana yakakosha braking zvinodiwa. Pamutemo, hapana musiyano pakati pezviviri izvi. Ose ari maviri anoshandiswa se "swichi" kubatanidza braking resistors, uye anoumbwa nemagetsi transistors, voltage sampling uye kuenzanisa maseketi uye dhiraivha maseketi.
Braking resistor inoshanda senge svikiro kuti simba rekugadzira injini riparadzwe nenzira yesimba rekupisa, uye rinosanganisira maviri akakosha paramita: kukosha kwekupikisa uye simba resimba. Mhando dzinowanzo shandiswa muinjiniya dzinosanganisira ripple resistors uye aluminium (Al) alloy resistors. Iyo yekutanga inoshandisa vertical corrugated surface kuti iwedzere kupisa kupisa, kuderedza parasitic inductance, uye inoshandisa yakakwirira-inodzivirira uye inodzoreredza murazvo inorganic coating kuchengetedza zvinobudirira waya yekuramba kubva mukuchembera uye kuwedzera hupenyu hwayo hwesevhisi. Iyo yekupedzisira yemamiriro ekunze kuramba uye vibration kuramba iri nani pane yechinyakare ceramic core resistors, uye inoshandiswa zvakanyanya munzvimbo dzakaomarara dzemaindasitiri ane zvinodiwa zvepamusoro. Iwo ari nyore kuisa zvakasimba uye anogona kuve akashongedzerwa nekuwedzera kupisa sinks (kudzikisa kupisa kunogadzirwa panguva yekushanda kwechigadzirwa), zvichipa chitarisiko chinoyevedza.
