Imoto ye-DC idityaniswe kunikezelo lwamandla ngebrashi ye-commutator.Xa i-current iqukuqela kwikhoyili, i-magnetic field ivelisa amandla, kwaye amandla enza i-DC motor ijikeleze ukuvelisa i-torque.Isantya semoto ye-DC ebrashiweyo siphunyezwa ngokuguqula amandla ombane osebenzayo okanye amandla emagnethi.Iinjini zebrashi zikholisa ukwenza ingxolo eninzi (zombini i-acoustic kunye nombane).Ukuba ezi ngxolo azikho zodwa okanye zikhuselekile, ingxolo yombane inokuphazamisa i-motor circuit, okukhokelela ekusebenzeni kwemoto engazinzanga.Ingxolo yombane eveliswa ziinjini zeDC inokwahlulwa ibe ngandidi ezimbini: uphazamiseko lombane kunye nengxolo yombane.Kunzima ukuyibona imitha ye-electromagnetic, kwaye yakuba ifunyenwe ingxaki, kuba nzima ukuyahlula kweminye imithombo yengxolo.Uphazamiseko lwamaza kanomathotholo okanye uphazamiseko lwemitha ye-electromagnetic ngenxa yokungeniswa kwe-electromagnetic okanye i-electromagnetic radiation ekhutshwa kwimithombo yangaphandle.Ingxolo yombane inokuchaphazela ukusebenza kweesekethe.Le ngxolo inokukhokelela ekuthotyweni okulula komatshini.

Xa i-motor isebenza, iintlantsi ziyenzeka ngamaxesha athile phakathi kweebhrashi kunye ne-commutator.Iintlantsi zezinye zezizathu zengxolo yombane, ngakumbi xa i-motor iqala, kwaye imisinga ephezulu ingena kwii-windings.Imisinga ephezulu idla ngokubangela ingxolo ephezulu.Ingxolo efanayo iyenzeka xa iibhrashi zihlala zingazinzile kumphezulu womhambisi kwaye igalelo kwimoto liphezulu kakhulu kunokuba bekulindelwe.Ezinye izinto, kubandakanywa ukufakwa kwe-insulation kwi-commutator surfaces, kunokubangela ukungazinzi kwangoku.

I-EMI inokutshatana kwiindawo zombane zemoto, ibangele ukuba isekethe yemoto ingasebenzi kakuhle kwaye ithobe umgangatho wokusebenza.Inqanaba le-EMI lixhomekeke kwizinto ezahlukeneyo ezifana nohlobo lwemoto (ibrashi okanye ibrashi), qhuba i-waveform kunye nomthwalo.Ngokubanzi, iimotor ezibrashwayo ziya kuvelisa i-EMI engaphezulu kuneemoto ezingenabrush, nokuba loluphi na uhlobo, uyilo lwemoto luyakuchaphazela kakhulu ukuvuza kwe-electromagnetic, iimotor ezincinci ezixutyiweyo ngamanye amaxesha zivelisa i-RFI enkulu, ubukhulu becala i-LC yokupasa ephantsi yokucoca kunye necala lentsimbi.

Omnye umthombo wengxolo wonikezelo lwamandla ngumbane.Ekubeni ukuchasana kwangaphakathi kokunikezelwa kwamandla akusiyo i-zero, kumjikelo ngamnye wokujikeleza, i-motor engapheliyo yangoku iya kuguqulwa ibe yi-voltage ripple kwii-terminals zonikezelo lwamandla, kunye ne-DC motor iya kuvelisa ngexesha lokusebenza ngesantya esiphezulu.ingxolo.Ukunciphisa ukuphazamiseka kwe-electromagnetic, iinjini zibekwe kude kwiisekethe ezibuthathaka kangangoko.Icasing yesinyithi yemoto ihlala ibonelela ngokukhusela okwaneleyo ukunciphisa i-EMI emoyeni, kodwa i-casing yentsimbi eyongezelelweyo kufuneka ibonelele ngokunciphisa i-EMI engcono.

Imiqondiso ye-electromagnetic eveliswa ziimotor zinokuphinda zidibanise kwiisekethe, zenze into ebizwa ngokuba luphazamiso lwendlela eqhelekileyo, engenakupheliswa ngokukhusela kwaye inokwehliswa ngokufanelekileyo ngesihluzo esilula se-LC.Ukunciphisa ngakumbi ingxolo yombane, ukuhluzwa kumbane kuyafuneka.Ngokuqhelekileyo kwenziwa ngokudibanisa i-capacitor enkulu (efana ne-1000uF nangaphezulu) kwiitheminali zamandla ukunciphisa uxhathiso olusebenzayo lonikezelo lwamandla, ngaloo ndlela kuphuculwe impendulo edlulayo, kunye nokusebenzisa idayagramu yesekethe egudileyo (jonga umfanekiso ongezantsi) ukuya Gqibezela i-overcurrent, i-overvoltage, i-LC filter.

I-Capacitance kunye ne-inductance ibonakala ngokubanzi kwi-symmetrically kwisekethe ukuqinisekisa ukulingana kwesekethe, yenza i-LC low-pass filter, kunye nokucinezela ingxolo yokuqhuba eyenziwa yi-carbon brush.I-capacitor icinezela ubukhulu becala i-voltage ephezulu eyenziwa ngokuqhawula okungahleliwe kwe-carbon brush, kwaye i-capacitor inomsebenzi omhle wokucoca.Ukufakwa kwe-capacitor ngokuqhelekileyo kudibaniswe nocingo oluphantsi.I-inductance ikhusela kakhulu ukutshintshwa ngokukhawuleza kwe-gap yangoku phakathi kwe-carbon brush kunye ne-copper sheet ye-commutator, kwaye i-grounding inokunyusa ukusebenza koyilo kunye nokucoca i-LC filter.Ii-inductors ezimbini kunye nee-capacitors ezimbini zenza umsebenzi wokucoca i-LC symmetrical.I-capacitor isetyenziselwa ukuphelisa i-voltage ephezulu eyenziwa yi-carbon brush, kwaye i-PTC isetyenziselwa ukuphelisa impembelelo yokushisa okugqithisileyo kunye nokunyuka okugqithisileyo kwangoku kwisekethe yemoto.