I-Electric dynamometer iyithuluzi lokuhlola eliphelele lokuhlola ukusebenza kwemishini ehlukahlukene yamandla. Isetshenziselwa kakhulu ukuhlola amandla okufaka amafeni, amaphampu amanzi, ukuhanjiswa kwamanzi noma amagiya, futhi ingasetshenziselwa ukuhlola amandla okukhipha ezinjini. Isebenza ngokugcwele (enazo zombili izimo zokuphehla ugesi namandla), ukusebenza okuphezulu kanye nemishini yokuhlola ebalulekile. Ixhunywe ngokuhlanganyela kumotho ehloliwe ngesixhumi se-shaft, esisetshenziselwa ukulingisa nokulawula umthwalo wenjini ehloliwe, ukukala imingcele efana ne-torque, isivinini, yamanje, i-voltage, amandla, ukusebenza kahle, njll. yemoto. Kanye namanye amaphrojekthi okuhlola amandla akhethekile, njengokuhlola ukuphepha, ukuhlolwa kokuhlola ibhalansi okuguquguqukayo, njll.
Ikesi yohlelo lokusebenza yedivayisi yempendulo ye-PFA yokubuyisela embonini ye-dynamometer
Ukuhlaziywa kohlelo lokulawula i-dynamometer yamanje:
Inketho yokuqala:
Sebenzisa umshini ohlanganisiwe we-ABB kanye ne-Siemens variable frequency feedback (i-4 quadrant frequency converter) ukuze uhlangabezane nezidingo zokusebenza ze-dynamometer. Lolu hlobo lwesixazululo lunentengo ephezulu, ukunemba kwetorque enhle, nokunemba kwesivinini okuzinzile.
Inketho yesibili:
Kusetshenziswa i-ABB kanye ne-Siemens abaguquli befrikhwensi ye-vector evamile enohlelo lwedivayisi yempendulo yokulungiswa kwe-PFA ukuze kuhlangatshezwane nezidingo zokusebenza ze-dynamometer. Lolu hlobo lwesixazululo luhlanganisa izinzuzo zomhlaba wonke ze-ABB kanye ne-Siemens frequency converter vector algorithms, kanye nokunemba kwetorque kanye nokunemba okungaguquki kwesivinini kuhlangabezana ngokugcwele nezidingo zokunemba ze-dynamometer. Ngakolunye uhlangothi, ukusebenzisa idivayisi ye-PFA yokulungisa kabusha inomphumela ongemuhle wezindleko, futhi ibuyisela ngokuzinzile amandla enjini yokuhlola ehambisana nalesi simo sokuphehla amandla kugridi, ngama-harmonics amanje<5% kanye nama-harmonics we-voltage<1%.
Inketho yesithathu:
Iziguquli ze-quadrant ezine zasekhaya zinezintengo ezifanayo nesixazululo sesibili, kodwa i-algorithm ye-vector yeziguquli zefrikhwensi yasekhaya inomkhawulo, ikakhulukazi ekulawuleni ukunemba kokuqina kanye nokunemba kwetorque okuthinta ukusebenza kwe-dynamometer.
Incazelo Yobuchwepheshe Eyisisekelo Yedivayisi Yempendulo Yokulungisa I-PFA:
⑴ Ukwamukela iyunithi yokucubungula emaphakathi ye-DSP enesivinini esikhulu:
Thuthukisa isofthiwe yokulawula impendulo yokulungiswa kokulungiswa kwesizukulwane esisha, ngokunemba kokulawula okunembile, ukuzinza okuhle, ukuvumelana okuncane, nekhono eliqinile lokunqanda ukuphazamiseka;
⑵ Ukwamukela ubuchwepheshe bakamuva bokushintshwa kwe-SVPWM embonini:
Thuthukisa ubuchwepheshe bokulawula i-vector yesizukulwane esisha se-SVPWM ukuze uhlangabezane nezimfuneko zempendulo yokulungisa amazinga kazwelonke wokuvumelana kwamanje;
⑶ Ukuxhumana okujwayelekile kwe-RS485 kanye nesibonisi samandla sempendulo:
Umkhiqizo ufika ojwayelekile nokuxhumana kwe-RS485 nokubonisa ukuxhumana kwekhibhodi, futhi yonke imingcele yokulawula isofthiwe ivuliwe ukuze iboniswe futhi ilungiswe, okwenza ukuqapha umkhiqizo kube lula;
⑷ Vimbela umphumela we-islanding:
Isofthiwe iqapha isimo segridi yamandla omoya ngesikhathi sangempela, futhi ngokushesha imisa impendulo yamandla kagesi kugridi lapho igridi inqanyulwa, ukuvimbela imiphumela ye-island;
⑸ Ukwamukela ubuchwepheshe bokuhlunga be-LC:
Lungiselela ukuhlunga kwe-LC ukuze ucindezele ngokuphumelelayo ukuphazanyiswa kwe-harmonics kanye ne-electromagnetic, nge-voltage kanye ne-THD yamanje <5%, ukuqinisekisa impendulo yamandla kagesi ahlanzekile;
Ukwamukela ubuchwepheshe bokubandlulula kwesigaba esizenzakalelayo:
Thuthukisa ubuchwepheshe bokubandlulula bokulandelana kwesigaba esizenzakalelayo, okuvumela ukulandelana kwesigaba segridi yamandla yezigaba ezintathu ukuthi ixhunywe ngokukhululekile ngaphandle kwesidingo sokuhlukanisa ngesandla;
Thuthukisa idizayini yezingxenyekazi zekhompuyutha ngaphezu kwezidingo ezijwayelekile zikazwelonke zokumelana nogesi:
Idizayini esanda kuthuthukiswa yezingxenyekazi zekhompiyutha ihlangabezana nemfuneko yomzuzu ongu-1 we-standstand voltage engu-2500 volts AC, nokuvuza kwamanje okungaphansi kuka-2mA, ngaphansi kakhulu kwezinga likazwelonke lika-30mA;
⑻ Thuthukisa izinga lamanje lempendulo yokulungiswa komshini:
I-Hardware esanda kuthuthukiswa kanye nesofthiwe yokulawula, inciphisa umthamo womshini womkhiqizo ngaphezu kwama-31% futhi ikhuphule yamanje ngama-34%;
Lungiselela ama-fuse:
Lungiselela i-DC kanye nezigaba ezintathu ze-AC fuse, qinisekisa ukuthi ukuvikelwa kwesifunda esifushane kusendaweni, futhi uqinisekise ukusebenza okuphephile kwe-inverter;
⑽ Idivayisi yokuhlunga eyakhelwe ngaphakathi, inqubo egcwele yokuhlunga umsindo, ukuphazamiseka kugridi yamandla yi-1/4 yaleyo yeziguquli zefrikhwensi ezejwayelekile;
⑾ Impendulo eyakhelwe ngaphakathi elungisa kabusha esebenzayo ekupheleni, enganikeza impendulo evuselela amandla kagesi kugridi. I-reactor eyakhelwe ngaphakathi nesihlungi, ingaxhunywa ngokuqondile kugridi yamandla, ngempendulo yamandla esebenza kahle efinyelela ku-97%. Ukonga amandla ngo-20% kuya ku-50% ngaphezu kweziguquli zefrikhwensi evamile, nokulahlekelwa ukushisa okungaphansi kuka-3% wamabhuleki okumelana, ukunciphisa imithombo yokushisa, kanye nesici sokuphepha esikhulayo;
12. Impendulo eyakhelwe ngaphakathi yokubuyisela esebenzayo ekupheleni, kusetshenziswa ukulungiswa kwe-IGBT, kunganciphisa u-15% kuya ku-25% womthamo wegridi yamandla uma kuqhathaniswa nokusebenzisa ukulungiswa kwebhuloho lokulungisa imvamisa evamile;
⒀ Impendulo eyakhelwe ngaphakathi elungisayo esebenzayo ekugcineni, isici samandla sifika ku-0.99;
Impendulo eyakhelwe ngaphakathi yokubuyisela esebenzayo ekupheleni, phakathi nokusebenza okulinganiselwe, ukuhlanekezela kwe-THD kwamandla kagesi wegridi kungaphansi kuka-5%, futhi ukuhlanekezela kwe-THD yamanje yegridi kungaphansi kuka-5%, kuhlangabezana nezidingo zekhwalithi yegridi;
Yonke idrayivu eyindilinga, ehambisana ne-magnetic synchronous motor engapheli kanye nezilawuli ze-asynchronous motor;
485 umsebenzi wokuxhumana, osekela iphrothokholi yokuxhumana ejwayelekile ye-485 kumodi ye-RTU;
⒄ Inemisebenzi eminingi yokuvikela efana ne-overcurrent, overload, short circuit, overvoltage, hardware overvoltage, undervoltage, ukulahleka kwesigaba segridi yamandla, amplitude yegridi yamandla, ukushisa ngokweqile, ukufaka amaphutha angaphandle, njll., ukuze kuqinisekiswe ukusebenza kohlelo oluphephile noluthembeke kakhudlwana;
Kulula ukufaka, ukulungisa iphutha, nokusebenza, ngokulungiswa nokugcinwa okulula;
Ukuhlaziywa kwecala lohlelo lokusebenza kwedivayisi yempendulo ye-dynamometer rectifier:
I-Tianjin Keda Power Testing Technology Co., Ltd. izinikele kakhulu ekuhloleni izithuthuthu, izimoto, izinjini kanye nezingxenye zazo ezibalulekile, ezinomlando wokuthuthuka weminyaka engaphezu kwengu-20. Kusukela ngo-2008, ibisebenzisa i-Siemens universal vector frequency converter kanye nesixazululo sedivayisi yethu ye-PFA rectifier impendulo.
Ukuthatha i-dynamometer kagesi ye-ACD-11 AC, okuyisisetshenziswa esikhethekile sokuhlola izitendi zokuhlola injini yenhloso evamile kaphethiloli, njengesibonelo, uhlelo lusebenzisa ubuchwepheshe bokulawula ukuguqulwa kwemoto nemvamisa ye-AC, kanye nobuchwepheshe bekhompyutha nesofthiwe yokuhlola, ukuze kuhlangatshezwane nezidingo zokuhlola zezinjini ezincane zenjongo evamile.
2. Imisebenzi esemqoka:
1. Lolu hlelo luqukethe izingxenye ezilandelayo:
(1) Umsingathi: I-AC power dynamometer;
(2) Ukulawula i-Dynamometer: Idivayisi yokulawula isivinini esishintshashintshayo se-SIEMENS AC, kusetshenziswa i-knob manual ukulungisa iphuzu lesimo sokusebenza;
(3) Ingxenye yokutholwa neyokucubungula idatha: ukusebenzisa amakhompuyutha okulawula izimboni ukuze kutholwe futhi kuboniswe izinhlaka ezihlukahlukene zokubona, ukuphatha idatha, imibiko yokuhlolwa kokuphrinta, kanye nokudweba amajika esici senjini;
2. Ukwamukela i-SIEMENS idivayisi yokulawula idijithali ngokugcwele, i-dynamometer kagesi ye-AC inezifunda ezimbili zokusebenza: ugesi kanye ne-dynamometer. Uma ugesi, ungashayela injini ukuze isebenze ngokuzenzakalelayo, futhi uma i-dynamometer isetshenziswa, ifaka umthwalo enjini, enezici zokulawula okusheshayo nezizinzile;
3. Ngesikhathi sokusebenza kwe-dynamometer, amandla enjini abuyiselwa kugridi yamandla ngedivayisi yempendulo ye-PFA yokulungisa kabusha. Lapho i-dynamometer isebenza ngaphansi kwesivinini esilinganiselwe se-variable frequency motor, ingafinyelela umthamo we-torque olinganiselwe we-dynamometer. Lapho i-dynamometer isebenza ngaphezu kwesivinini esilinganiselwe se-variable frequency motor, ingafinyelela amandla alinganiselwe we-dynamometer;
4. I-dynamometer isebenzisa ukulawulwa kwejubane njalo noma imodi yokulawula i-torque engaguquki;
Ukunemba kokuhlolwa kwesistimu kugcina ukunemba kokulawula kwe-Siemens universal vector frequency converter
(1) Isivinini: ± 0.2% ± 1r/min;
(2) Itorque: ± 1%;
