Iyo DC mota yakabatana kune magetsi kuburikidza ne commutator bhurashi.Kana iyo yazvino ichiyerera kuburikidza necoil, iyo magineti inogadzira simba, uye simba rinoita iyo DC mota kutenderera kuburitsa torque.Iko kumhanya kweiyo brushed DC mota inowanikwa nekushandura voltage yekushanda kana simba remagineti.Mabhurashi mota anowanzo kuburitsa ruzha rwakawanda (zvese acoustic nemagetsi).Kana ruzha urwu rusina kuparadzaniswa kana kudzivirirwa, ruzha rwemagetsi runogona kukanganisa dunhu remota, zvichikonzera kusagadzikana kushanda kwemota.Ruzha rwemagetsi runogadzirwa neDC motors runogona kukamurwa kuita mapoka maviri: kukanganiswa kwemagetsi uye ruzha rwemagetsi.Electromagnetic radiation inonetsa kuona, uye kana dambudziko rikaonekwa, zvinonetsa kusiyanisa kubva kune mamwe manyuko eruzha.Kukanganiswa kweredhiyo frequency kana electromagnetic radiation kukanganiswa kunokonzerwa nemagetsi induction kana electromagnetic mwaranzi inoburitswa kubva kunze kwekunze.Ruzha rwemagetsi runogona kukanganisa kushanda kwemasekete.Iyi Noise inogona kutungamira mukuderedzwa kuri nyore kwemuchina.

Kana mota ichimhanya, pfarivari dzimwe nguva dzinoitika pakati pemabhurashi nemufambi.Sparks ndechimwe chezvikonzero zveruzha rwemagetsi, kunyanya kana mota yatanga, uye mafungu akanyanya kuyerera achipinda mumhepo.Mhepo dzepamusoro dzinowanzokonzera kukonzera ruzha rwepamusoro.Ruzha rwakafanana runoitika kana mabhurashi anoramba asina kugadzikana pane yevafambi uye iyo yekupinza mota yakakwira zvakanyanya kupfuura zvinotarisirwa.Zvimwe zvinhu, zvinosanganisira insulation yakaumbwa pane inotenderera nzvimbo, inogonawo kukonzera kusagadzikana kwazvino.

EMI inogona kubatana muzvikamu zvemagetsi zvemotor, zvichiita kuti dunhu remota risashande nekudzikisira kuita.Iyo nhanho yeEMI inotsamira pane akasiyana zvinhu zvakaita serudzi rwemota (brush kana brushless), dhiraivha waveform uye mutoro.Kazhinji, mabhurashi mota anoburitsa EMI yakawanda kupfuura brushless mota, zvisinei kuti ndeipi mhando, dhizaini yemota ichakanganisa zvakanyanya kudonha kwemagetsi, madiki mabhurashi mota dzimwe nguva anoburitsa RFI hombe, kazhinji iri nyore LC Low pass filter uye simbi kesi.

Imwe ruzha runobva kune magetsi ndeyemagetsi.Sezvo kupikisa kwemukati kwemagetsi kusiri zero, mune yega yega kutenderera, iyo isiri-inogara mota yazvino ichashandurwa kuita voltage ripple pamagetsi emagetsi emagetsi, uye mota yeDC ichagadzira panguva yekumhanya-mhanya.noise.Kuti uderedze kukanganiswa kwemagetsi, mota dzinoiswa kure kure nemasekete anonzwira tsitsi sezvinobvira.Iyo simbi casing yemota inowanzopa yakakwana dziviriro kudzikisa mhepo EMI, asi iyo yekuwedzera simbi casing inofanirwa kupa zvirinani EMI kudzikisira.

Electromagnetic masiginecha anogadzirwa nemamotor anogona zvakare kubatana mumaseketi, achigadzira inonzi yakajairika-modhi kupindira, iyo isingagone kubviswa nekudzivirira uye inogona kunyatso kuderedzwa neyakapusa LC yakaderera-pass sefa.Kuti uwedzere kuderedza ruzha rwemagetsi, kusefa pane magetsi kunodiwa.Zvinowanzoitwa nekuwedzera hombe capacitor (senge 1000uF uye pamusoro) pamagetsi emagetsi kuderedza kusimba kwesimba remagetsi, nekudaro kunatsiridza mhinduro yenguva pfupi, uye kushandisa sefa-inopfava wedunhu diagiramu (ona mufananidzo uri pazasi) zadzisa iyo overcurrent, overvoltage, LC sefa.

Capacitance uye inductance kazhinji inooneka symmetrically mudunhu kuti ive nechokwadi chechiyero chedunhu, gadzira LC yakaderera-pass sefa, uye kudzvanya ruzha rwekuita rwunogadzirwa nekabhoni brashi.Iyo capacitor inonyanya kudzvanya iyo peak voltage inogadzirwa nekusagadzika kubviswa kwekabhoni brashi, uye iyo capacitor ine yakanaka kusefa basa.Kuiswa kwecapacitor kunowanzo kubatanidzwa kune pasi waya.Iyo inductance inonyanya kudzivirira shanduko yakangoerekana yavapo pakati pekabhoni brashi uye commutator mhangura sheet, uye iyo ivhu inogona kuwedzera dhizaini dhizaini uye kusefa kweLC sefa.Maviri inductors uye maviri capacitor anoumba symmetrical LC sefa basa.Iyo capacitor inonyanya kushandiswa kubvisa peak voltage inogadzirwa nekabhoni brashi, uye iyo PTC inoshandiswa kubvisa kukanganiswa kwekushisa kwakanyanya uye kuwedzera kwazvino kuvhiya padunhu remota.