Umhlinzeki weyunithi ye-frequency converter braking ukukhumbuza ukuthi kunemingcele eminingi yokuhlela yesiguquli sefrikhwensi, futhi ipharamitha ngayinye inebanga elithile lokukhetha. Ngesikhathi sokusetshenziswa, kuvamile ukuhlangana nokwenzeka kwesiguquli semvamisa singasebenzi kahle ngenxa yokumiswa okungalungile kwamapharamitha angawodwana. Ngakho-ke, kuyadingeka ukusetha kahle imingcele efanele.
1. Indlela yokulawula:
Okungukuthi, ukulawula isivinini, ukulawula i-torque, ukulawulwa kwe-PID, noma ezinye izindlela. Ngemva kokwamukela indlela yokulawula, ngokuvamile kuyadingeka ukwenza ukuhlonza okumile noma okuguquguqukayo okusekelwe ekunembeni kokulawula.
2. Ubuncane bemvamisa yokusebenza:
Isivinini esincane lapho injini isebenza khona. Lapho injini isebenza ngesivinini esiphansi, ukusebenza kwayo kokukhipha ukushisa kubi, futhi ukusebenza isikhathi eside ngesivinini esiphansi kungabangela ukuthi injini ishise. Ngaphezu kwalokho, ngesivinini esiphansi, i-current in the cable izophinde ikhule, okungabangela ukushisa kwekhebula.
3. Imvamisa yokusebenza ephezulu:
Imvamisa ephezulu yesiguquli sefrikhwensi ejwayelekile ifika ku-60Hz, kanti enye ifinyelela ku-400Hz. Amafrikhwensi aphezulu azodala ukuthi injini igijime ngesivinini esikhulu. Kumamotho ajwayelekile, ama-bearings awo awakwazi ukusebenza ngesivinini esikaliwe isikhathi eside. Ingabe i-rotor yemoto ingamelana namandla anjalo amaphakathi.
4. Imvamisa yenkampani yenethiwekhi:
Uma imvamisa yenkampani yenethiwekhi isethiwe, iba nkulu izingxenye ze-harmonic ze-oda eliphezulu, ezisondelene kakhulu nezici ezifana nobude bekhebula, ukufudumeza kwemoto, ukushisisa ikhebula, nokushisisa kwesiguquli sefrikhwensi.
5. Amapharamitha ezimoto:
Isiguquli sefrikhwensi sisetha amandla, amanje, i-voltage, isivinini, kanye nemvamisa ephezulu yemoto kumapharamitha, angatholwa ngokuqondile ku-nameplate yemoto.
6. Ukweqa imvamisa:
Endaweni ethile yefrikhwensi, i-resonance ingase yenzeke, ikakhulukazi uma lonke idivayisi iphakeme kakhulu; Lapho ulawula i-compressor, gwema iphuzu lokukhuphuka le-compressor.
7. Ukusheshisa kanye nesikhathi deceleration
Isikhathi sokusheshisa sisho isikhathi esidingekayo ukuze imvamisa yokuphumayo ikhuphuke isuka ku-0 iye kubuningi obukhulu, kuyilapho isikhathi sokuncishiswa sibhekisela esikhathini esidingekayo ukuze imvamisa yokuphuma yehle isuka kubuningi obukhulu iye ku-0. Ngokuvamile, isikhathi sokusheshisa nokunciphisa sinqunywa isignali yokusetha imvamisa ekhuphukayo futhi ehla. Ngesikhathi sokusheshisa kwezimoto, izinga lokukhuphuka kokusetha imvamisa kufanele likhawulelwe ukuze kuvinjwe i-overcurrent, futhi ngesikhathi sokuncishiswa, izinga lokuncipha kufanele likhawulelwe ukuvimbela ukugcwala ngokweqile.
Izidingo zokusetha isikhathi sokusheshisa: Nciphisa isivinini samanje sibe ngaphansi komthamo we-overcurrent wesiguquli sefrikhwensi, ukuze ungabangeli isiguquli semvamisa ukuthi sihambe ngenxa yokuqina okudlulele; Amaphuzu abalulekile okusetha isikhathi sokuncishiswa ukuvimbela i-voltage yesekethe eshelelayo ekubeni ibe phezulu kakhulu, kanye nokuvimbela ukugcwala kokuvuselela kabusha ukuthi kume futhi kubangele ukuthi isiguquli sefrikhwensi sihambe. Isikhathi sokusheshisa nokunciphisa singabalwa ngokusekelwe emthwalweni, kodwa ekulungiseni iphutha, kuvamile ukusetha isikhathi eside sokusheshisa kanye nokunciphisa isikhathi esisekelwe emthwalweni kanye nesipiliyoni, futhi sibheke ukuthi kukhona yini ama-alamu angaphezu kwe-overcurrent kanye ne-overvoltage ngokuqala nokumisa imoto; Bese ufinyeza kancane kancane isikhathi sokusetha ukusheshisa nokunciphisa, ngokusekelwe kumgomo wokungabi ne-alamu ngesikhathi sokusebenza, futhi uphinde usebenze izikhathi ezimbalwa ukuze unqume ukusheshisa okuphelele nesikhathi sokunciphisa.
8. Ukuthuthukiswa kwe-torque
Eyaziwa nangokuthi isinxephezelo se-torque, iyindlela yokwandisa ibanga le-f/V le-low-frequency ukuze kunxeshezelwe ukwehla kwe-torque ngesivinini esiphansi esibangelwa ukumelana kwe-motor stator winding. Uma isethelwe ku-othomathikhi, i-voltage ngesikhathi sokusheshisa inganyuswa ngokuzenzakalelayo ukuze kunxeshezelwe i-torque yokuqala, okuvumela injini ukuthi isheshise kahle. Uma usebenzisa isinxephezelo somuntu, ijika elilungile lingakhethwa ngokuhlolwa ngokusekelwe ezicini zomthwalo, ikakhulukazi izici zokuqala zomthwalo. Ngemithwalo ye-torque eguquguqukayo, ukukhetha okungalungile kungaholela ku-voltage ephezulu ephumayo ngesivinini esiphansi, kumoshe amandla kagesi, futhi kubangele amandla aphezulu lapho uqala injini ngomthwalo ngaphandle kokunyusa isivinini.
9. Ukuvikelwa kwe-electronic thermal overload
Lo msebenzi uklanyelwe ukuvikela injini ekushiseni ngokweqile. Ibala ukukhuphuka kwezinga lokushisa kwemoto ngokusekelwe kunani lamanje lokusebenza kanye nemvamisa nge-CPU ngaphakathi kwesiguquli sefrikhwensi, ngaleyo ndlela inikeze ukuvikeleka kokushisa ngokweqile. Lo msebenzi usebenza kuphela ezimweni "ezizodwa kuya kwesinye", futhi ezimweni "ezinye kuya kweziningi", ukudluliselwa okushisayo kufanele kufakwe kunjini ngayinye.
Inani lezilungiselelo zokuvikela okushisayo kwe-elekthronikhi (%)=[isilinganiso samanje semoto (A)/ilinganiselwe ukuphuma kwamanje kwesiguquli sefrikhwensi (A)] × 100%.
10. Umkhawulo wemvamisa
Ama-amplitudes omkhawulo aphezulu naphansi wemvamisa yokuphuma kwesiguquli semvamisa. Ukunqunyelwa imvamisa kuwumsebenzi wokuvikela ovimbela ukusetshenziswa kabi noma ukwehluleka komthombo wesignali wokusetha ifrikhwensi yangaphandle, okungabangela ukuthi imvamisa yokuphumayo ibe phezulu kakhulu noma ibe phansi kakhulu, ukuze kuvinjwe umonakalo emishinini. Setha ngokuya ngesimo sangempela kuhlelo lokusebenza. Lo msebenzi ungasetshenziswa futhi njengomkhawulo wesivinini. Kwabanye abathumeli bebhande, ngenxa yenani elilinganiselwe lezinto ezidluliswayo, isiguquli sefrikhwensi singasetshenziswa ukunciphisa ukugqokwa kwemishini nebhande. Imvamisa yomkhawulo ophezulu wesiguquli sefrikhwensi ingasethwa enanini elithile lefrikhwensi, ukuze isidlulisi sebhande sikwazi ukusebenza ngesivinini esimisiwe nesiphansi sokusebenza.
11. Imvamisa yokuchema
Ezinye zibizwa nangokuthi i-deviation frequency noma isilungiselelo sokuchezuka kwefrikhwensi. Inhloso yawo ukulungisa imvamisa yokuphumayo lapho i-frequency isethwe isignali ye-analog yangaphandle (i-voltage noma yamanje), kusetshenziswa lo msebenzi ukusetha imvamisa ephansi yokuphumayo yesiginali yokusetha imvamisa. Ezinye iziguquli zefrikhwensi zingasebenza phakathi kwebanga elingu-0-fmax lapho isignali yokusetha imvamisa ingu-0%, futhi ezinye iziguquli zefrikhwensi (ezifana ne-Mingdian ne-Sanken) nazo zingasetha i-bias polarity. Uma ngesikhathi sokulungisa iphutha, lapho isignali yokusetha imvamisa ingu-0%, imvamisa yokuphumayo yesiguquli sefrikhwensi ingeyena u-0Hz kodwa i-xHz, bese ukusetha ifrikhwensi yokuchema iye ku-xHz eyinegethivu kungenza imvamisa yokuphumayo yesiguquli sefrikhwensi ibe ngu-0Hz.
12. Ukuzuza kwesignali yokusetha imvamisa
Lo msebenzi usebenza kuphela uma usetha imvamisa ngesignali ye-analog yangaphandle. Isetshenziselwa ukunxephezela ukungahambisani phakathi kwe-voltage yesiginali yesethi yangaphandle kanye ne-voltage yangaphakathi (+10v) yesiguquli sefrikhwensi; Ngesikhathi esifanayo, kulula ukulingisa ukukhethwa kwezilungiselelo zamandla wesignali. Uma usetha, lapho isignali yokufaka ye-analogi isezingeni eliphezulu (njengo-10v, 5v, noma 20mA), bala iphesenti lefrikhwensi elingakhipha izithombe ze-f/V futhi ulisebenzise njengepharamitha yokusetha; Uma isignali yokusetha yangaphandle ingu-0-5V futhi imvamisa yokuphuma kwesiguquli sefrikhwensi ingu-0-50Hz, isignali yokuzuza ingasethelwa ku-200%.
13. Umkhawulo we-torque
Ingahlukaniswa ngezinhlobo ezimbili: umkhawulo we-torque yokushayela kanye nomkhawulo we-torque yamabhuleki. Ibala i-torque nge-CPU ngokusekelwe ku-voltage okukhiphayo kanye namanani amanje wesiguquli semvamisa, engathuthukisa kakhulu izici zokutholwa kwemithwalo yomthelela ngesikhathi sokusheshisa, ukwehla, nokusebenza kwesivinini esingaguquki. Umsebenzi wokunciphisa i-torque ungafinyelela ukusheshisa okuzenzakalelayo nokulawula ukwehlisa. Uma sicabanga ukuthi isikhathi sokusheshisa nokunciphisa isikhathi sincane kunesikhathi somthwalo we-inertia, singaqinisekisa futhi ukuthi i-motor isheshisa ngokuzenzakalelayo futhi iyancipha ngokuvumelana nenani lokusetha i-torque.
Umsebenzi we-torque wokushayela unikeza i-torque yokuqala enamandla. Ngesikhathi sokusebenza okuzinzile, umsebenzi wetorque ulawula ukushelela kwemoto futhi ukhawule itorque yemoto enanini eliphakeme lokusetha. Lapho i-torque yokulayisha ikhuphuka ngokuzumayo, noma isikhathi sokusheshisa sisethwe sifushane kakhulu, ngeke kubangele ukuthi inverter ihambe. Uma isikhathi sokusheshisa sisethwe sifushane kakhulu, i-torque ye-motor ngeke idlule inani eliphakeme elibekiwe. I-torque enkulu yokushayela inenzuzo ekuqaleni, ngakho-ke kufaneleka kakhulu ukuyibeka ku-80-100%.
I-value encane ebekiwe ye-torque yokubopha, amandla amakhulu okubhuleka, afanele izimo zokusheshisa nokusheshisa. Uma inani elimisiwe le-torque yokubhuleka liphezulu kakhulu, kungase kwenzeke into ye-alamu ye-overvoltage. Uma i-torque ye-braking isethelwe ku-0%, ingenza inani eliphelele lokuvuselelwa kwengezwe ku-capacitor eyinhloko eduze no-0, ukuze injini ikwazi ukwehla ime ngaphandle kokusebenzisa i-resistor braking futhi ngeke ihambe. Kodwa kweminye imithwalo, njengalapho i-torque yokubhuleka isethelwe ku-0%, kungase kube nesenzakalo esifushane sokungenzi lutho ngesikhathi sokuncipha, okubangela isiguquli semvamisa ukuthi siqale ngokuphindaphindiwe futhi esamanje siguquguquke kakhulu. Ezimweni ezimbi kakhulu, kungase kukhube isiguquli sefrikhwensi, okufanele sithathwe ngokungathi sína.