Ngesikhathi senqubo yokubhuleka, ukulahlekelwa kwangaphakathi kwenjini kanye nokulahlekelwa komthwalo wemishini cishe ku-20% wetorque elinganiselwe.
Ngakho-ke, uma i-torque yokubhuleka edingekayo ingaphansi kwaleli nani, asikho isitha sangaphandle sokubhuleka esidingekayo. Lapho i-frequency converter (VFD) isetshenziselwa ukwehlisa amandla noma ukwehliswa okuphuthumayo komthwalo omkhulu we-inertia, injini isebenza esimweni sokuphehla amandla futhi idlulisele amandla omthwalo kuyisekethe ye-DC ye-VFD ngebhuloho le-inverter, okubangela i-voltage yebhasi ye-VFD. ukuphakama.
Uma idlula inani elithile, isiguquli se-frequency sizobika iphutha le-overvoltage (i-deceleration overvoltage, i-deceleration overvoltage engazelelwe).
Ukuze uvimbele lesi simo ukuthi senzeke, kufanele kukhethwe i-resistor yokubopha.
Ukukhethwa kweI-Braking Resistorukumelana:
Inani lokumelana le-resistor yokubhuleka akufanele libe likhulu kakhulu. Inani lokumelana ngokwedlulele lizoholela ekungeneni kwe-torque yamabhuleki. Ngokuvamile ingaphansi noma ilingana nenani lokumelana ne-braking elihambisana ne-torque engu-100%. Ukumelana kwe-resistor yokubhuleka akufanele kube kuncane kakhulu, futhi akumele kube ngaphansi kwenani eliphansi elivumelekile le-resistor yokubhuleka. I-braking current eyeqile ingase ilimaze iyunithi yokubhuleka eyakhelwe ngaphakathi ye-inverter.
Ukukhetha amandla okumelana namabhuleki:
Ngemuva kokukhetha inani lokumelana le-I-Braking Resistor, khetha amandla okumelana nokubhuleka ngokwezinga lokusebenzisa amabhuleki lika-15% no-30%. Uma sithatha i-dehydrator eyi-automatic ngokugcwele engu-100kg njengesibonelo, kusetshenziswa i-11kW frequency converter, izinga lokusebenzisa ibhuleki licishe libe ngu-15%: Ungakhetha i-62Ω resistor braking ehambisana ne-“100% braking torque”, bese ukhetha amandla ebhuleki. isiphikisa. Uma ubhekisa kumathebula e-“100% braking torque” kanye “no-15% we-braking utilization”, amandla ahambisana ne-braking resistor angu-1.7kW, kanti asetshenziswa kakhulu ngu-1.5kW noma 2.0kW. Ekugcineni, khetha “62Ω, 1.5kW” noma 2.0 kW ukumelana namabhuleki.
” Ukuze ubhuleke ngokushesha, ama-“62Ω, 1.5kW ama-braking resistors” amabili angaxhunywa ngokuhambisana, okulingana ne-“31Ω, 3.0kW resistor braking”.
Nokho, kufanele kuqashelwe ukuthi inani lokugcinaI-Braking Resistor exhunywe phakathi kwamatheminali e-P+ ne-DB akumele ibe ngaphansi kwenani elincane elishiwo lokumelana elingu-30Ω. Ukusetshenziswa kwamabhuleki: Lokhu kubhekisela esilinganisweni sesikhathi esingaphansi kwebhuleki ukuya esikhathini esiphelele sokusebenza. Izinga lokusebenzisa amabhuleki livumela iyunithi yokubhuleka kanye ne-braking resistor isikhathi esanele sokuqeda ukushisa okukhiqizwa ngesikhathi sokubhuleka. Isibonelo, uma umshini usebenza imizuzu engu-50 futhi usesimweni sokubhuleka imizuzu engu-7.5, izinga lokubhuleka lingu-7.5/50=15%.
Ezikhathini ezidinga ukubhuleka njalo, njengama-dehydrators, uma izinga lokubhuleka lidlula u-15% kuthebula, amandla e-resistor yokubhuleka adinga ukukhushulwa ngokulinganayo ngokuya ngezimo ezithile zokusebenza. Sethemba ukuthi lokhu kuhumusha kuwusizo kuwe!
