Radial Multipole Magnets
Feem ntau hais lus, tus naj npawb ntawm tus ncej yog hais txog ntau tus ncej magnetization ntawm lub cev muaj zog rotor magnetic nplhaib. Rau cov nplhaib sib nqus, 2- ncej hlau nplaum feem ntau yog siv hauv cov DC motors me, thiab qee qhov muaj 4 ncej; thaum stepping motors, BLDC motors, thiab synchronous motors siv sib nqus rings nrog 4, 6, 8, 10, 12, 24, 48….Etc. txawm-numbered ncej, tab sis nyob rau hauv kev ua hauj lwm tiag tiag, vim muaj kev txwv ntawm tej yam kev mob, xws li txoj kab uas hla, tam sim no ceev, tshav kub dissipation, ntim thiab lwm yam, lub siab tshaj plaws tus naj npawb ntawm magnetization ncej nyob rau hauv lub cheeb txoj kab uas hla yog txwv. ncej Qhov piv rau qhov loj ntawm qhov ncig ua ib qho kev txwv ntawm qhov dav ntawm cov ncej sib nqus. Yog tias qhov dav ntawm cov ncej hlau nplaum tsawg dua 1 hli, nws nyuaj heev rau kev sib nqus. Yog li ntawd, rau lub nplhaib sib nqus nrog ib txoj kab uas hla, tus naj npawb ntawm cov hlau nplaum yog txwv. Tom qab cov hlau nplaum tau them tag nrho, qhov zoo ntawm cov hlau nplaum tuaj yeem raug txiav txim los ntawm kev soj ntsuam ntau qhov tsis sib xws hauv lub waveform: nruab nrab tus nqi siab, qhov sib txawv thiab cheeb tsam (lossis lub voj voog ua haujlwm). Qhov nruab nrab tus nqi siab qhia seb qhov kev ua tau zoo ntawm cov hlau nplaum los yog hlau nplaum ua tau raws li qhov yuav tsum tau ua ntawm cov khoom; qhov sib txawv heev qhia seb lub uniformity ntawm magnetization yog zoo los yog phem; thaj chaw (los yog lub voj voog lub luag haujlwm) qhia qhov loj ntawm magnetization waveform. Qhov loj ntawm lub cev muaj zog txiav txim siab qhov tso zis ntawm lub cev muaj zog, tab sis qhov loj dua, qhov ntau dua qhov chaw torque ntawm lub cev muaj zog, thiab qhov kev xav ntawm kev sib hloov tsis zoo. Feem ntau, nyob rau hauv DC lub cev muaj zog, yuav tsum muaj cov zis loj, yog li lub luag haujlwm piv yog loj; Thaum lub BLDC lub cev muaj zog yuav tsum muaj kev sib hloov ruaj khov, nws muaj qhov ntsuas - qhov hloov pauv ntawm lub zog, tshwj xeeb tshaj yog nyob rau hauv qis qis, qhov me me ntawm qhov hloov pauv ntawm lub zog, qhov sib nqus waveform yuav tsum tau ze rau lub sine yoj. Qhov no txhais tau hais tias peb yuav tsum tau nce ntug ntawm lub magnetization waveform kom nce tsis tu ncua thiab maj mam.
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