Kugunda kwakunja kwa sitepe kuyenera kukhala kolakwika, osati kusuntha kupita pamalo omwe mwasankha. Kugunda kopitirira muyeso kuyenera kukhala kosiyana ndi kusuntha kupita pamalo omwe mwasankha.
Ma mota oyendera masitepeKawirikawiri amagwiritsidwa ntchito m'makina owongolera mayendedwe komwe kulamulira kumakhala kosavuta kapena komwe kumafunika mtengo wotsika. Ubwino waukulu ndi wakuti malo ndi liwiro zimayendetsedwa mwanjira yotseguka. Koma chifukwa chakuti ndi open-loop control, malo olemetsa alibe mayankho ku control loop, ndipo stepper motor iyenera kuyankha molondola kusintha kulikonse kwa excitation. Ngati ma frequency a excitation sanasankhidwe bwino, stepper motor sidzatha kusuntha kupita kumalo atsopano. Malo enieni a katundu akuwoneka kuti ali ndi cholakwika chosatha poyerekeza ndi malo omwe wowongolera amayembekezera, mwachitsanzo, chochitika chosachitika kapena overshoot chimaganiziridwa. Chifukwa chake, mu stepper motor open-loop control system, momwe mungapewere kutayika kwa step and overshoot ndiye chinsinsi cha magwiridwe antchito abwinobwino a open-loop control system.
Zochitika zosayembekezereka komanso zopitirira muyeso zimachitika pamenemota ya stepperimayamba ndi kuyima, motsatana. Kawirikawiri, malire a pafupipafupi yoyambira dongosolo ndi otsika, pomwe liwiro lofunikira logwirira ntchito nthawi zambiri limakhala lalikulu. Ngati dongosolo layambitsidwa mwachindunji pa liwiro loyenera lothamanga, chifukwa liwiro lapitirira malire, pafupipafupi yoyambira ndipo silingayambitsidwe bwino, kuyambira ndi sitepe yotayika, kulemera sikungayambe konse, zomwe zimapangitsa kuti kuzungulira kutsekeke. Dongosolo likayamba kugwira ntchito, ngati mapeto afika nthawi yomweyo siyani kutumiza ma pulses, kotero kuti ayime nthawi yomweyo, ndiye chifukwa cha kufooka kwa dongosolo, mota yoyendetsa idzatembenuza malo olinganiza omwe wolamulira akufuna.
Kuti tithetse vuto la kutuluka mu sitepe ndi kupitirira muyeso, tiyenera kuwonjezera ku chiwongolero choyenera cha kuthamanga ndi kutsika kwa liwiro. Nthawi zambiri timagwiritsa ntchito: khadi lowongolera mayendedwe a unit yowongolera yapamwamba, PLC yokhala ndi ntchito zowongolera unit yowongolera yapamwamba, microcontroller ya unit yowongolera yapamwamba kuti ilamulire kuthamanga ndi kutsika kwa liwiro imatha kuthana ndi vuto la kutayika kwa sitepe.
M'mawu a anthu wamba: pamene dalaivala wa stepper alandira chizindikiro cha pulse, amayendetsamota ya stepperkuti mutembenuze ngodya yokhazikika (ndi ngodya ya sitepe) mbali yomwe yayikidwa. Mutha kuwongolera kuchuluka kwa ma pulse kuti muwongolere kuchuluka kwa kusuntha kwa angular, kuti mukwaniritse cholinga chokhazikika molondola; nthawi yomweyo, mutha kuwongolera ma pulse frequency kuti muwongolere liwiro ndi kufulumira kwa kuzungulira kwa mota, kuti mukwaniritse cholinga chowongolera liwiro. Stepper motor ili ndi parameter yaukadaulo: ma frequency oyambira osanyamula katundu, ndiko kuti, stepper motor ngati ma frequency oyambira osanyamula katundu amatha kuyamba bwino. Ngati ma frequency oyambira ndi apamwamba kuposa ma frequency oyambira osanyamula katundu, stepper motor singayambe bwino, ikhoza kutayika masitepe kapena kutsekereza. Pankhani ya katundu, ma frequency oyambira ayenera kukhala otsika. Ngati mota ikufuna kuzungulira pa liwiro lalikulu, ma frequency oyambira ayenera kukhala ndi njira yofulumira yofulumira, mwachitsanzo, ma frequency oyambira ndi otsika kenako amakwera mpaka ma frequency apamwamba omwe mukufuna pa liwiro linalake (liwiro la mota limakwera kuchokera pansi kupita pa liwiro lalikulu).
Kuchuluka koyambira = liwiro loyambira × masitepe angati pa kuzungulira kulikonse.Liwiro loyambira lopanda katundu ndi mota ya stepper popanda kufulumizitsa kapena kuchepetsa mphamvu popanda katundu kuzungulira mwachindunji mmwamba. Mota ya stepper ikazungulira, mphamvu ya gawo lililonse la kuzunguliza kwa mota imapanga mphamvu yamagetsi yobwerera; ma frequency akakwera, mphamvu yamagetsi yobwerera imakhala yayikulu. Pansi pa ntchito yake, mota yokhala ndi ma frequency (kapena liwiro) imawonjezeka ndipo mphamvu yamagetsi imachepa, zomwe zimapangitsa kuti torque ichepe.
Tiyerekeze kuti: mphamvu yonse yotulutsa ya chochepetsera ndi T1, liwiro lotulutsa ndi N1, chiŵerengero chochepetsera ndi 5:1, ndipo ngodya yokwerera ya mota yokwerera ndi A. Kenako liwiro la mota ndi: 5*(N1), ndiye mphamvu yotulutsa ya mota iyenera kukhala (T1)/5, ndipo pafupipafupi yogwirira ntchito ya mota iyenera kukhala
5*(N1)*360/A, kotero muyenera kuyang'ana kachidutswa ka khalidwe la moment-frequency: mfundo yolumikizirana [(T1)/5, 5*(N1)*360/A] siili pansi pa kachidutswa ka khalidwe la ma frequency (kachidutswa koyambira ka moment-frequency). Ngati ili pansi pa kachidutswa ka moment-frequency, mutha kusankha mota iyi. Ngati ili pamwamba pa kachidutswa ka moment-frequency, ndiye kuti, simungasankhe mota iyi chifukwa idzaphonya-sitepe, kapena sidzatembenuka konse.
Kodi mumadziwa momwe ntchito ikuyendera, muyenera kudziwa liwiro lalikulu, ngati mwatsimikiza, ndiye kuti mutha kuwerengera motsatira njira yomwe yaperekedwa pamwambapa, (kutengera liwiro lalikulu la kuzungulira, ndi kukula kwa katundu, mutha kudziwa ngati mota ya stepper yomwe mwasankha tsopano ndi yoyenera, ngati sichoncho muyenera kudziwanso mtundu wa mota ya stepper yomwe mungasankhe).
Kuphatikiza apo, mota ya stepper poyambira pambuyo pa katundu ikhoza kusasinthika, kenako ndikuwonjezera pafupipafupi, chifukwamota ya stepperMzere wa ma frequency a mphindi uyenera kukhala ndi ziwiri, zomwe ziyenera kukhala mzere wa ma frequency a mphindi yoyambira, ndipo inayo ndi yosiyana ndi mzere wa ma frequency a mphindi, mzere uwu ukuyimira tanthauzo la: yambani mota pa frequency yoyambira, mukamaliza kuyamba mutha kuwonjezera katundu, koma mota sidzataya step state; kapena Yambitsani mota pa frequency yoyambira, ngati katundu wokhazikika, mutha kuwonjezera liwiro loyendetsa bwino, koma mota sidzataya step state.
Zomwe zili pamwambapa ndi kuyambitsa kwa injini ya stepper yopita patsogolo komanso yothamanga kwambiri.
Ngati mukufuna kulankhulana ndi kugwirizana nafe, chonde musazengereze kulankhula nafe!
Timagwirizana kwambiri ndi makasitomala athu, kumvetsera zosowa zawo ndikuchita zomwe akufuna. Timakhulupirira kuti mgwirizano pakati pa onse umadalira khalidwe la malonda ndi utumiki kwa makasitomala.
Nthawi yotumizira: Epulo-03-2023