Motokari yeDC ine zvikamu zviviri zvikuru: rotor uye stator. Rotor ine toroidal core ine slots yekubata makoiri kana mamhepo. Zvinoenderana nemutemo waFaraday, kana iyo core inotenderera mune remagineti, voltage kana simba remagetsi rinokonzerwa mucoil, uye izvi zvinokonzeresa simba remagetsi zvinokonzeresa kuyerera kwezvino, kunonzi eddy current.

Eddy currents ndiwo mhedzisiro yekutenderera kwepakati mukatithemagnetic field

Eddy ikozvino imhando yekurasikirwa kwemagineti, uye kurasikirwa kwesimba nekuda kwekuyerera kweeddy ikozvino kunonzi eddy ikozvino kurasikirwa. Hysteresis kurasikirwa chimwe chikamu chekurasikirwa kwemagineti, uye kurasikirwa uku kunoburitsa kupisa uye kuderedza kushanda kwemota.

Kubudirira kweeddy ikozvino inokonzerwa nekupikisa kwezvinhu zvayo zvinoyerera

Kune chero ipi zvayo yemagineti, kune hukama hwakasiyana-siyana pakati pe-cross-sectional area yezvinhu uye kushorwa kwayo, izvo zvinoreva kuti nzvimbo yakaderera inotungamirira kukuwedzera kwekupikisa, izvo zvinozoita kuti kuderera kwe eddy currents. Imwe nzira yekudzikisa nzvimbo yekuyambuka ndeyekuita kuti zvinhu zvive zvitete.

Izvi zvinotsanangura chikonzero nei iyo mota yepakati yakagadzirwa neakawanda matete simbi mapepa (anonzielectric motor laminations) pane chidimbu chimwe chikuru uye chakasimba chesimbi. Aya mapepa ega ega ane kupikisa kwepamusoro pane rimwe pepa rakasimba, uye naizvozvo anogadzira zvishoma eddy ikozvino uye yakaderera eddy ikozvino kurasikirwa.

Huwandu hwema eddy currents mune laminated cores ishoma pane iyo mu solid cores

Aya mazambuko akaiswa insulated kubva kune mumwe nemumwe, uye mutsetse we lacquer unowanzo shandiswa kudzivirira eddy mafungu "kusvetuka" kubva kune stack kuenda kune stack. Iyo inverse square hukama pakati pekukora kwezvinhu uye kurasikirwa kwazvino kunoreva kuti chero kudzikiswa kwehukobvu kuchave nemhedzisiro yakakura pahuwandu hwekurasikirwa. Naizvozvo, Gator, a Chinainogutsa rotor fekitari, inovavarira kuita kuti mota dzepakati laminations dzive dzakatetepa sezvinobvira kubva pamaonero ekugadzira uye mutengo, neazvino maDC motors anowanzo shandisa laminations e0.1 kusvika 0.5 mm gobvu.

Mhedziso

Iyo eddy yazvino yekurasa meshini inoda kuti mota isungirwe ne insulating layers yezvitunha kudzivirira eddy currents "kusvetuka" kubva kumalaminations kusvika kune laminations.