I-DC motor ixhunywe kugesi ngebhulashi elihambayo.Lapho i-current igeleza kukhoyili, inkambu kazibuthe ikhiqiza amandla, futhi amandla enza i-DC motor ijikeleze ukuze ikhiqize itorque.Isivinini se-brushed DC motor sitholakala ngokushintsha i-voltage yokusebenza noma amandla kazibuthe.Izinjini zamabhulashi zivame ukudala umsindo omkhulu (kokubili i-acoustic nekagesi).Uma le misindo ingahlukanisiwe noma ivikelekile, umsindo kagesi ungaphazamisa umjikelezo wemoto, okuholela ekusebenzeni kwemoto okungazinzile.Umsindo kagesi okhiqizwe ama-DC motors ungahlukaniswa izigaba ezimbili: ukuphazamiseka kukagesi kanye nomsindo kagesi.Kunzima ukuhlonza imisebe ye-electromagnetic, futhi lapho inkinga itholakele, kuba nzima ukuyihlukanisa kweminye imithombo yomsindo.Ukuphazamiseka kwefrikhwensi yomsakazo noma ukuphazamiseka kwemisebe kagesi kungenxa yokungeniswa kukagesi noma imisebe kazibuthe ekhishwa emithonjeni yangaphandle.Umsindo kagesi ungathinta ukusebenza kahle kwamasekhethi.Le Noise ingaholela ekulimazeni okulula komshini.

Lapho injini isebenza, izinhlansi ziyenzeka ngezikhathi ezithile phakathi kwamabhulashi nesihambisi.Izinhlansi zingenye yezimbangela zomsindo kagesi, ikakhulukazi lapho injini iqala, futhi imisinga ephakeme kakhulu igeleza kuma-windings.Imisinga ephezulu ivamise ukubangela umsindo omkhulu.Umsindo ofanayo uvela lapho amabhulashi ehlala engazinzile endaweni yokuthutha futhi okokufaka enjini kuphezulu kakhulu kunalokho obekulindelwe.Ezinye izici, okuhlanganisa ukufakwa kwe-insulation okwakhiwa endaweni yabahambi, nakho kungabangela ukungazinzi kwamanje.

I-EMI ingakwazi ukubhangqa ezingxenyeni zikagesi zenjini, okubangela ukuthi isekethe yemoto ingasebenzi kahle futhi yehlise izinga lokusebenza.Izinga le-EMI lincike ezintweni ezahlukahlukene njengohlobo lwenjini (ibhulashi noma i-brushless), idrayivu i-waveform nomthwalo.Ngokuvamile, ama-motor ama-brushed azokhiqiza i-EMI eningi kunama-brushless motors, akunandaba ukuthi hlobo luni, ukwakheka kwemoto kuzothinta kakhulu ukuvuza kwe-electromagnetic, ama-motor amancane abhulashiwe kwesinye isikhathi akhiqiza i-RFI enkulu, ikakhulukazi isihlungi se-LC Low pass kanye nekesi lensimbi.

Omunye umthombo womsindo wokunikezwa kwamandla amandla kagesi.Njengoba ukumelana kwangaphakathi kokunikezwa kwamandla akuyona i-zero, emjikelezweni ngamunye wokuzungeza, i-motor ye-motor engashintshi izoguqulwa ibe i-voltage ripple kumatheminali okunikezwa kwamandla kagesi, futhi i-DC motor izokhiqiza ngesikhathi sokusebenza ngesivinini esikhulu.umsindo.Ukuze kuncishiswe ukuphazamiseka kwe-electromagnetic, amamotho abekwa kude namasekethe azwelayo ngangokunokwenzeka.I-casing yensimbi yenjini imvamisa ihlinzeka ngesivikelo esanele sokunciphisa i-EMI esemoyeni, kodwa i-casing yensimbi eyengeziwe kufanele inikeze ukuncishiswa kwe-EMI okungcono.

Izimpawu zikagesi ezikhiqizwe amamotho zingaphinde zihlangane zibe yiziyingi, zenze lokho okubizwa ngokuthi ukuphazamiseka kwemodi evamile, okungeke kuqedwe ngokuvikela futhi kungancishiswa ngempumelelo ngesihlungi esilula se-LC.Ukuze uqhubeke unciphisa umsindo kagesi, ukuhlunga endaweni yamandla kuyadingeka.Ngokuvamile kwenziwa ngokwengeza i-capacitor enkulu (efana no-1000uF nangaphezulu) kuwo wonke amatheminali kagesi ukuze kwehliswe ukumelana okusebenzayo kokuphakelwa kukagesi, ngaleyo ndlela kuthuthukiswe ukusabela kwesikhashana, nokusebenzisa umdwebo wesekethe oshelelayo (bona isibalo esingezansi) ukuze qedela i-overcurrent , overvoltage, isihlungi se-LC.

I-Capacitance ne-inductance ngokuvamile ibonakala ngokulinganayo kusekethe ukuze kuqinisekiswe ibhalansi yesekhethi, yakha isihlungi se-LC low-pass, futhi icindezele umsindo wokuqhuba okhiqizwa ibhulashi lekhabhoni.I-capacitor ikakhulukazi icindezela i-voltage ephezulu ekhiqizwa ukunqanyulwa okungahleliwe kwe-carbon brush, futhi i-capacitor inomsebenzi omuhle wokuhlunga.Ukufakwa kwe-capacitor ngokuvamile kuxhunywe ocingweni lwaphansi.I-inductance ivimbela ngokuyinhloko ukuguqulwa okungazelelwe kwegebe lamanje phakathi kwe-carbon brush kanye neshidi lethusi le-commutator, futhi i-grounding ingakhuphula ukusebenza komklamo kanye nomphumela wokuhlunga wesihlungi se-LC.Ama-inductors amabili nama-capacitor amabili akha umsebenzi wokuhlunga we-LC olinganayo.I-capacitor isetshenziselwa ngokuyinhloko ukuqeda amandla okushisa aphezulu akhiqizwa ibhulashi le-carbon, futhi i-PTC isetshenziselwa ukuqeda umthelela wokushisa okweqile kanye nokuhlinzwa kwamanje okweqile kumjikelezo wemoto.