Ukuze kufezekiswe ukusebenza kwesantya esiguquguqukayo semoto, iteknoloji ye-inverter isetyenziswa kakhulu kwimoto engaqhumiyo. Njengesixhobo, i-inverter inokuguqula umbane we-frequency power (50Hz okanye 60Hz) ibe ziintlobo ngeentlobo zombane we-AC, ukuze kufezekiswe ukusebenza kwesantya esiguquguqukayo semoto. Esi sixhobo siquka isekethe yokulawula isekethe ephambili; isekethe ye-Rectifier yokuguqula i-alternating current ibe yi-direct current; isekethe ye-DC intermediate isetyenziselwa ukuthambisa nokucoca imveliso yesekethe ye-rectifier; isekethe ye-Inverter, esetyenziselwa ukuguqula i-direct current ibe yi-alternating current. Kwezinye ii-frequency converters ezifuna ukwenza imisebenzi emininzi, kufuneka zixhotyiswe nge-CPU yokubala i-torque kunye nesekethe ehambelanayo. Ngokutshintsha i-frequency yombane ye-stator winding yemoto, ummiselo wesantya se-frequency esiguquguqukayo unokufezekisa injongo yommiselo wesantya.
I-Inverter Ngokweendlela ezahlukeneyo zokwahlulahlula, ingahlulwa ibe yi-inverter yohlobo lwe-voltage kunye ne-inverter yohlobo lwangoku, i-inverter yolawulo lwe-PAM, i-inverter yolawulo lwe-PWM kunye ne-inverter yolawulo lwe-PWM oluphezulu, i-inverter yolawulo lwe-V/f, i-inverter yolawulo lwe-slip frequency kunye ne-inverter yolawulo lwe-vector, i-inverter ngokubanzi, i-inverter ekhethekileyo yokusebenza okuphezulu, i-inverter ye-frequency ephezulu, i-inverter yesigaba esinye kunye ne-inverter yesigaba sesithathu, njl.
Kwi-frequency converter, i-VVVF ibhekisa ekutshintsheni kwe-voltage kunye ne-frequency, ngelixa i-CVCF ibhekisa kwi-constant voltage kunye ne-constant frequency. Kwi-AC power supply esetyenziswa kumazwe kwihlabathi liphela, nokuba kusemakhaya okanye kwimizi-mveliso, i-voltage kunye ne-frequency zihlala ziyi-400V/50Hz okanye i-200V/60Hz(50Hz). Isixhobo esiguqula umbane onjalo ube yi-voltage okanye i-frequency variable power supply ibizwa ngokuba yi-"frequency converter". Ukuze kuveliswe ii-voltage kunye ne-frequency eziguquguqukayo, isixhobo kufuneka kuqala siguqule i-alternating current ibe yi-direct current (DC).
Isiguquli sefrikhwensi sisetyenziselwa ukulawula i-motor kwaye sinokutshintsha zombini i-voltage kunye nefrikhwensi. Ngokwendlela i-AC motor ebonakalisa ngayo isantya, isantya se-n silingana nefrikhwensi f, kwaye isantya se-motor sinokulungiswa logama nje ifrikhwensi f itshintshiwe. Ke ngoko, isiguquli sefrikhwensi sifezekisa ukulawulwa kwesantya ngokutshintsha ifrikhwensi yombane we-motor, nto leyo ethetha ukusebenza kakuhle kunye nokusebenza kakuhle kwesantya.
Kuphuhliso lwee-frequency converters, iindlela ezahlukeneyo zokulawula ziye zavela, kuquka:
Imo yokulawula ye-Sinusoidal pulse width modulation (SPWM), apho i-1U/f=C;
Imo yokulawula i-voltage space vector (SVPWM);
Imo yokulawula iVektha (VC);
Imo yokulawula i-torque ngqo (i-DTC);
I-matrix intersection - imo yolawulo lwe-intersection, njl.
Ngaphezulu, kuchazwe indlela entsha yokusebenzisa i-inverter kwi-motor engaqhumiyo. Ngeteknoloji ye-inverter, isantya se-motor sinokulungiswa ngokulula, nto leyo ebangela ukuba izisombululo zamandla ezisebenza kakuhle kakhulu kunye nokusebenza okuphezulu zisebenze kakuhle kwicandelo lemizi-mveliso.
Ixesha lokuthumela: Agasti-26-2023