Ngethuba lenkqubo yokuqhawula, ilahleko yangaphakathi yemoto kunye nokulahleka komthwalo womatshini malunga ne-20% ye-torque elinganisiweyo.
Ngoko ke, ukuba i-torque yokunyathela efunekayo ingaphantsi kweli xabiso, akukho sixhasi sangaphandle sokunyathela esifunekayo. Xa i-frequency converter (VFD) isetyenziselwa ukwehlisa isantya okanye ukuthoba okungxamisekileyo komthwalo omkhulu we-inertia, i-motor isebenza kwimeko yokuvelisa amandla kwaye idlulisele amandla omthwalo kwisekethe ye-DC ye-VFD ngebhulorho yokuguqula, ibangela umbane webhasi ye-VFD. ukwenyuka.
Xa idlula ixabiso elithile, i-converter frequency iya kuxela i-fault overvoltage (i-deceleration overvoltage, i-deceleration overvoltage ngokukhawuleza).
Ukuze kuthintelwe le nto ukuba ingenzeki, i-resistor braking kufuneka ikhethwe.
Ukukhethwa kweI-Braking Resistorukuchasa:
Ixabiso lokuchasana le-resistor ye-braking akufanele libe likhulu kakhulu. Ixabiso lokuxhathisa ngokugqithisileyo liya kukhokelela kwi-torque engonelanga ye-braking. Ngokuqhelekileyo ingaphantsi okanye ilingana nexabiso lokuxhathisa i-braking elihambelana ne-100% ye-torque yokunyathela. Ukuchasana kwe-resistor braking akufanele kube kuncinci, kwaye akufanele kube ngaphantsi kwexabiso elincinci elivumelekileyo le-resistor braking. Ukunyanzeliswa kwe-braking current kungonakalisa iyunithi ye-braking eyakhelwe-ngaphakathi ye-inverter.
Ukukhethwa kwamandla okumelana neziqhoboshi:
Emva kokukhetha ixabiso lokumelana neI-Braking Resistor, khetha amandla okumelana ne-braking ngokwezinga lokusetyenziswa kwe-braking ye-15% kunye ne-30%. Ukuthatha i-100kg enqunyanyisiweyo ye-dehydrator ezenzekelayo ezenzekelayo njengomzekelo, usebenzisa isiguquli se-11kW frequency, izinga lokusetyenziswa kwe-brake limalunga ne-15%: Unokukhetha i-62Ω isixhasi sokunyathela esihambelana ne- "100% ye-torque ye-braking", uze ukhethe amandla e-braking. isixhasi. Ngokubhekiselele kwi-"100% ye-torque ye-braking" kunye "ne-15% yokusetyenziswa kwe-braking" iitafile, amandla okumelana ne-braking resistor yi-1.7kW, kwaye asetyenziswa rhoqo yi-1.5kW okanye i-2.0kW. Okokugqibela, khetha i-“62Ω, 1.5kW” okanye i-2.0 kW yokuxhathisa isiqhoboshi.
” Ukuze uqhoboshe ngokukhawuleza, ezimbini “i-62Ω, 1.5kW izixhasi zokuqhobosha” zinokudityaniswa ngokunxuseneyo, elilingana ne “31Ω, 3.0kW isixhasi sokunyathela”.
Nangona kunjalo, kufuneka kuqatshelwe ukuba ixabiso lokugqibela leI-Braking Resistor idityaniswe phakathi kweetheminali ze-P+ kunye ne-DB akufunekanga ibe ngaphantsi kwexabiso elichaziweyo elisezantsi lokuchasa le-30Ω. Ukusetyenziswa kweBrake: Oku kubhekiselele kumlinganiselo wexesha eliphantsi kwesiqhoboshi ukuya kwixesha lokusebenza lilonke. Izinga lokusetyenziswa kwe-braking livumela iyunithi yokunyathela kunye ne-braking resistor ixesha elaneleyo lokuchitha ubushushu obuveliswe ngexesha lokunyathela. Umzekelo, ukuba umatshini usebenza imizuzu engama-50 kwaye ukwimeko yokuqhobosha imizuzu eyi-7.5, umlinganiselo wokuqhobosha ngu-7.5/50=15%.
Ngezihlandlo ezifuna ukunyanyiswa rhoqo, ezifana ne-dehydrators, ukuba izinga lokunyathela lidlula i-15% kwitheyibhile, amandla okumelana ne-braking kufuneka anyuswe ngokulinganayo ngokwemiqathango ethile yokusebenza. Ndiyathemba ukuba le nguqulelo iluncedo kuwe!
