EMC OPTIMIZATION YUMUVUGIZI WIHUTIRWA MOTOR

1. Impamvu za EMC ningamba zo gukingira

Muri moteri yihuta cyane idafite moteri, ibibazo bya EMC akenshi byibandwaho ningorabahizi byumushinga wose, kandi inzira yo gutezimbere EMC yose ifata igihe kinini. Kubwibyo, dukeneye kumenya neza ibitera EMC irenze ibisanzwe hamwe nuburyo bwiza bwo guhitamo.

Gutezimbere EMC ahanini bitangirira ku byerekezo bitatu:

• Kunoza inkomoko yo kwivanga

Mugucunga moteri yihuta ya moteri idafite moteri, isoko yingenzi yo kwivanga ni umuzunguruko wa disiki igizwe nibikoresho byo guhinduranya nka MOS na IGBT. Hatagize ingaruka ku mikorere ya moteri yihuta, kugabanya inshuro zitwara MCU, kugabanya umuvuduko wo guhinduranya umuyoboro uhinduranya, no guhitamo umuyoboro uhinduranya hamwe nibipimo bikwiye birashobora kugabanya neza kwivanga kwa EMC.

• Kugabanya inzira yo guhuza inzira yo kwivanga

Kunoza inzira ya PCBA hamwe nimiterere birashobora kunoza neza EMC, kandi guhuza imirongo kurindi bizatera intambamyi nini. Cyane cyane kumirongo yumurongo wibimenyetso byinshi, gerageza wirinde ibimenyetso bikora imirongo hamwe nibisobanuro bikora antene. Nibiba ngombwa irashobora kongera urwego rwo gukingira kugabanya guhuza.

• Uburyo bwo guhagarika kwivanga

Bikunze gukoreshwa muri EMC kunoza ni ubwoko butandukanye bwa inductance na capacator, kandi ibipimo bikwiye byatoranijwe kubitandukanya bitandukanye. Y capacitor hamwe nuburyo busanzwe bwa inductance nuburyo busanzwe bwo kwivanga, na X capacitor nuburyo bwo gutandukanya uburyo butandukanye. Impeta ya magnetiki ya inductance nayo igabanijwemo impeta nini ya magnetiki nini nimpeta ntoya ya magnetiki, kandi ubwoko bubiri bwa inductance bugomba kongerwaho icyarimwe mugihe bibaye ngombwa.

2. Urubanza rwa EMC

Muri EMC itezimbere ya 100.000-rpm ya moteri idafite amashanyarazi ya sosiyete yacu, dore ingingo zingenzi nizera ko zizafasha buri wese.

Kugirango moteri igere ku muvuduko mwinshi wa revolisiyo ibihumbi ijana, ubwikorezi bwambere bwashyizwe kuri 40KHZ, bukubye kabiri izindi moteri. Muri iki kibazo, ubundi buryo bwo gutezimbere ntabwo bwashoboye kunoza neza EMC. Imirongo yagabanutse kugera kuri 30KHZ kandi umubare wigihe cyo guhinduranya MOS ugabanukaho 1/3 mbere yuko habaho iterambere ryinshi. Muri icyo gihe, byagaragaye ko Trr (igihe cyo kugarura igihe) cya diode ihindagurika ya MOS igira ingaruka kuri EMC, kandi MOS ifite igihe cyihuse cyo gukira cyatoranijwe. Ikizamini cyibizamini nkuko bigaragara ku gishushanyo gikurikira. Ingano ya 500KHZ ~ 1MHZ yiyongereyeho hafi 3dB kandi imitsi ya spike yarahinduwe:

Bitewe nimiterere yihariye ya PCBA, hari imirongo ibiri yumuriro mwinshi cyane ugomba guhuzwa nindi mirongo yerekana ibimenyetso. Nyuma yumurongo-mwinshi wumurongo uhinduwe kumurongo ugoretse, kwivanga hagati yicyerekezo ni bito cyane. Ikizamini cyibizamini nkuko bigaragara ku gishushanyo gikurikira, kandi marike ya 24MHZ yiyongereyeho hafi 3dB:

Muri iki kibazo, inductors ebyiri zisanzwe zikoreshwa, imwe murimwe ni impeta ya magnetiki ntoya, hamwe na inductance ya 50mH, itezimbere cyane EMC murwego rwa 500KHZ ~ 2MHZ. Ibindi ni impeta ya magnetiki yumurongo mwinshi, hamwe na inductance ya 60uH, itezimbere cyane EMC murwego rwa 30MHZ ~ 50MHZ.

Ikizamini cyibizamini bya magnetiki yumurongo muke byerekanwe kumashusho hepfo, kandi marike rusange yiyongereyeho 2dB murwego rwa 300KHZ ~ 30MHZ:

Ikizamini cyikizamini cyumuvuduko mwinshi wa magnetiki cyerekanwe mubishushanyo bikurikira, kandi margin yiyongereyeho 10dB:

Nizere ko buriwese ashobora kungurana ibitekerezo no kungurana ibitekerezo kuri optimizme ya EMC, kandi akabona igisubizo cyiza mugupimisha ubudahwema.