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dc tsarin sarrafa saurin motsi

Aikace-aikacen tsarin sarrafa motsi na dc

  Aikace-aikacen tsarin sarrafa motsi na dc

 

Gwamnan DC shine na'urar don daidaita saurin motar DC. Ƙarshen sama yana haɗa da wutar lantarki ta AC, ƙananan ƙarshen yana haɗa da motar DC, kuma gwamnan DC ya canza wutar AC zuwa kayan wutar lantarki guda biyu na DC, shigarwa ɗaya zuwa DC motor neodymium (stator), gaba ɗaya. Shigar da kayan aikin motar DC (rotor), gwamnan DC yana daidaita saurin motar DC ta hanyar sarrafa wutar lantarki na DC armature.   Aikace-aikacen tsarin sarrafa saurin motar dc. A lokaci guda, motar DC tana ba da ra'ayi na yanzu ga gwamna. Gwamna yana ƙayyade saurin motar DC bisa ga ra'ayin halin yanzu. Idan ya cancanta, ana gyara fitowar wutar lantarki don sake daidaita saurin motar.

Tsarin sarrafa saurin injin DC gabaɗaya yana da hanyoyi uku masu zuwa:

1. Canja ƙarfin ƙarfin hannu;
2. Canja wutar lantarki mai motsawa;
3. Canja juriya na madauki.

Aikace-aikacen tsarin sarrafa motsi na dc

  Aikace-aikacen tsarin sarrafa saurin motar dc. Yin amfani da microcomputer mai guntu guda ɗaya don sarrafa motsi na motar DC, gabaɗaya ɗaukar hanyar daidaita wutar lantarki, PWM1 da PWM2 microcomputer guda ɗaya ne ke sarrafa su don samar da bugun jini mai canzawa, ta yadda wutar lantarki akan motar. shi ma bugun bugun jini ne mai fadi mai canzawa. Bisa ga dabara

U=aVCC

  Aikace-aikacen tsarin sarrafa saurin motar dc. Inda: U shine ƙarfin lantarki na armature; a shine zagayowar aikin bugun jini (0 <a <1); Tushen wutar lantarki na VCC DC, anan 5V.

Wutar wutar lantarki na motar ana sarrafa ta ta hanyar fitar da bugun jini na microcomputer mai guntu guda ɗaya, kuma ana samun canji na injin DC ta hanyar fasahar daidaita yanayin bugun jini (PWM).

Aikace-aikacen tsarin sarrafa motsi na dc

Domin a kewayen gadar H-bridge, ana iya tuka motar ne kawai a lokacin da matakan PWM1 da PWM2 suka yi gaba da juna, wato lokacin da PWM1 da PWM2 duka suna da girma ko ƙasa, ba za su iya aiki ba, don haka ainihin faɗin bugun jini a sama. adadi. don B,

  Aikace-aikacen tsarin sarrafa saurin motar dc. Mun saita lokacin raƙuman ruwa na PWM zuwa 1ms, kuma za'a iya daidaita sake zagayowar aikin ta matakai 100 (bambanci tsakanin kowane matakin shine 10%), don haka mai ƙidayar lokaci T0 ya haifar da katsewa kowane 0.01ms, kuma ya shiga cikin zagayowar. PWM na gaba kowane sau 100. A cikin wannan adadi na sama, zagayowar wajibi shine 60%, wato, bugun jini na fitarwa shine 0.6ms, kuma kashe bugun bugun shine 0.4ms, don haka ƙarfin ƙarfin armature shine 5*60%=3V.

Muna magana ne game da juyawa gaba da baya.   Aikace-aikacen tsarin sarrafa saurin motar dc. Idan muka juya a hanya ɗaya kawai, muna buƙatar saita PWM1 zuwa babban matakin ko ƙananan matakin, kuma kawai canza canjin bugun jini na wani matakin PWM2, kamar yadda aka nuna a ƙasa. Q4 yana kunne, Q3 yana rufe, motar tana iya daidaita saurin jujjuyawar agogo kawai)

Aikace-aikacen tsarin sarrafa motsi na dc

Bayan ci gaba da bincikowa da kuma nuni ga ƙirar maigidan, a ƙarshe an kammala aikin sarrafa injin stepper na microcomputer guda ɗaya, kuma ana iya aiwatar da ainihin lokacin gaba da jujjuyawar juyawa, haɓakawa da raguwar injin ɗin.

     Aikace-aikacen tsarin sarrafa motsi na dc   Amma ga ka'idar aikin stepper motor, na gaskanta cewa mutane da yawa sun riga sun san cewa wannan lokacin shine motar motsa jiki mai hawa huɗu, wanda ke amfani da yanayin aiki mai ɗaukar hoto huɗu, wato: A-AB-B-BC-C- CD-D-DA-A

Aikace-aikacen tsarin sarrafa motsi na dc

Ana iya raba sarrafa saurin motar DC zuwa hanyar sarrafa motsin rai da hanyar sarrafa wutar lantarki armature. Ana amfani da sarrafa tashin hankali kadan, kuma ana amfani da sarrafa wutar lantarki a yawancin aikace-aikace.   Aikace-aikacen tsarin sarrafa saurin motar dc. Tare da ci gaban fasahar lantarki, ana iya samun canza ƙarfin wutar lantarki ta hanyoyi daban-daban, daga cikinsu pulse width modulation (PWM) ita ce hanyar da aka saba amfani da ita ta canza wutar lantarki. Hanyar ita ce daidaita ƙarfin wutar lantarki U na injin DC ta hanyar canza rabon lokacin kan lokaci na ƙarfin wutar lantarki zuwa lokacin kuzari (watau rabon aiki), ta haka sarrafa saurin motar.

 

  Aikace-aikacen tsarin sarrafa saurin motar dc. Ana amfani da janareta na kalaman triangular don samar da UT triangular wave na wani mitar, wanda adder ya ƙara zuwa siginar shigarwar UI don samar da siginar UI UT, wanda aka aika zuwa mai kwatanta. Mai kwatancen op amp ne wanda ke aiki a cikin buɗaɗɗen madauki tare da samun babban buɗaɗɗen madauki da iyakance halayen sauyawa. Canji kaɗan a cikin bambancin sigina tsakanin abubuwan shigar guda biyu yana haifar da kwatancen don fitar da siginar sauyawa daidai. Gabaɗaya, ƙarancin shigarwar mai kwatancen yana ƙasa kuma siginar UI UT ita ce shigarwa daga madaidaicin tasha. Lokacin da UI UT> 0, mai kwatanta yana fitar da ingantaccen matakin cikakken girma; lokacin da UI UT0, mai kwatanta yana fitar da mummunan matakin cikakken girman girman.  Aikace-aikacen tsarin sarrafa saurin motar dc.

Ana nuna tsarin daidaitawa na siginar siginar ta hanyar wutar lantarki-pulse nisa mai juyawa a cikin siffa 2. Saboda ƙayyadaddun halaye na mai kwatanta, girman siginar fitarwa Amurka ba ta canzawa, amma girman bugun jini ya bambanta da UI. Ana ƙayyade mitar Amurka ta mitar kalaman triangular.

Lokacin da siginar umarni UI = 0, siginar fitarwa na Amurka bugun bugun jini ce mai kusurwa mai kyau daidai kuma mara kyau. Na farko, siginar sarrafa dabaru na motsi yana ba da siginar microcomputer guda ɗaya, galibi gami da siginar jagorar tafiyar Dir, saurin motar da ke daidaita siginar PWM da siginar birki na motar. TL 494 ne ke yin juzu'i mai faɗin juzu'i, kuma siginar fitarwar sa tana motsa da'irar wutar lantarki ta H-gado don tuƙi motar DC.   Aikace-aikacen tsarin sarrafa saurin motar dc. H-gadar ta ƙunshi manyan FET guda huɗu da aka inganta, waɗanda ke aiki don canza sitiyarin motar da ƙara siginar tuƙi.

A cikin da'irar da ta fahimci ikon PWM na motar, tsarin yana amfani da guntu TL494, kuma da'irarsa ta ciki ta ƙunshi da'irar ƙirar ƙarfin lantarki, da'irar oscillation, da'irar daidaitawar lokacin daidaitawa, amplifiers kuskure guda biyu, bugun bugun jini mai daidaita yanayin daidaitawa da kewayen fitarwa, da dai sauransu, TL494 guntu An yi amfani da shi sosai a cikin bututu biyu mai ƙarewa guda ɗaya, gada, gada mai cike da wutar lantarki.   Aikace-aikacen tsarin sarrafa saurin motar dc. An haɗa duk na'urori masu faɗin bugun jini. Guntu tana da ginanniyar sawtooth oscillator na linzamin kwamfuta tare da abubuwan oscillating guda biyu kawai na waje ( resistor daya da capacitor daya). Ƙararrawar kuskuren da aka gina a ciki. A ciki ya ƙi tushen ƙarfin wutar lantarki na 5V. Ana iya daidaita lokacin matattu. Ginshikan wutar lantarki na transistor yana ba da damar tuƙi 500mA. Tura ko ja hanyoyin fitarwa biyu.

 

Tare da gaisuwa mafi kyau,
 
Lee (Sashen Talla; Miss.)         
NER GROUP CO., LIMITED    
Yantai Bonway Manufacturer Co., Ltd.                        
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