Tsim ntawm EMI input lim rau kev hloov fais fab mov system
Qhov tsim tau zoo ntawm EMI kev coj ua hauv kev hloov hluav taws xob hloov hluav taws xob yog txhawm rau txhim kho qhov tsim ntawm EMI lim;
Hloov fais fab mov electromagnetic compatibility advanced optimization tsim; rau cov khoom thiab tswj cov tshuab nrog hloov hluav taws xob; cov input EMI low-pass lim tau muab tso rau ntawm qhov kawg ntawm cov tswv yim rau qhov teeb meem ntawm EMI-kev coj ua ntawm lub kaw lus, thiab txawm tias tus tsim ntawm EMS kuj tseem ceeb heev!
Kev cuam tshuam kev cuam tshuam (EMS) yuav ua rau muaj kev hem thawj rau cov khoom siv hluav taws xob lossis cov khoom siv hluav taws xob hloov hluav taws xob, thiab yuav muaj teeb meem nrog cov khoom lag luam thiab kev ua haujlwm!
Hom kev cuam tshuam EMS tam sim no yog kev txhaj tshuaj ntawm hom sib txawv cuam tshuam & hom kev cuam tshuam rau lub cev;
Hom kev cuam tshuam (hom hom tam sim no): Nyob rau tib theem, tam sim no ntawm L thiab N xov hlau (los yog cov xov hlau xaim) thiab cov xaim hauv av;
Kev sib txawv ntawm hom kev cuam tshuam (kev sib txawv tam sim no): ib qho tam sim no uas taug kev ntawm kab L thiab N (los yog kab teeb liab thiab kab rov qab) thiab muaj qhov sib txawv ntawm qhov sib txawv thiab theem;
Hom hom tam sim no thiab txawv hom tam sim no tuaj yeem muaj nyob hauv ib khub ntawm cov xov hlau tib lub sijhawm; ua raws li kev soj ntsuam theoretical hauv qab no:
Lub suab nrov nrov ntawm qhov sib txawv ntawm kev cuam tshuam (EMS) yuav ua rau muaj kev hem thawj rau cov khoom siv hluav taws xob & khoom siv, thiab yuav muaj teeb meem nrog cov khoom lag luam thiab kev ua haujlwm!
Lub suab nrov tshaj plaws ntawm kev cuam tshuam hom kev cuam tshuam (EMS) yuav tsis ncaj qha ua rau muaj kev hem thawj rau cov khoom siv hluav taws xob & khoom siv; hom kev cuam tshuam tsis cuam tshuam ncaj qha rau cov khoom siv, tab sis cuam tshuam rau cov khoom siv los ntawm kev hloov nws mus rau hauv qhov sib txawv hom voltage! Txij li thaum lub kaw lus siv AC fais fab mov thiab xav tau me me thiab kev ua haujlwm zoo, daim ntawv thov hloov hluav taws xob yog qhov tseem ceeb!
Lus Cim: Cov khoom siv hluav taws xob & cov cuab yeej muaj kev txhawj xeeb nrog kev hloov cov khoom siv hluav taws xob! Yog hais tias koj tawm tawm lub input lim ntawm lub switching fais fab mov
1. Qhov cuam tshuam ntawm kev hloov hluav taws xob hloov kab nws tus kheej ntawm kev cuam tshuam tawg yog tsawg heev. Qhov laj thawj yog vim li cas qhov tseem ceeb ntawm kev cuam tshuam tawg yog kev cuam tshuam ntau zaus.
2. Lub lim capacitors nyob rau hauv lub switching fais fab mov kab yog tag nrho cov teem rau suppress low-frequency differential hom cuam tshuam, thiab cov electrolytic capacitors nyob rau hauv nws tsis txaus rau lub ripple suppression ntawm lub switching fais fab mov nws tus kheej, cia nyob ib leeg rau cov pab pawg neeg mem tes nrog. harmonic Cheebtsam saum 60MHz cuam tshuam muaj kev cuam tshuam,
3. Thaum siv lub oscilloscope los soj ntsuam cov pulse pab pawg waveforms ntawm lub tswv yim thiab cov zis terminals ntawm lub switching fais fab mov, tsis muaj teeb meem cuam tshuam attenuation nyhuv.
Los ntawm qhov kev pom no, lub lim tswv yim ntawm kev hloov hluav taws xob hloov hluav taws xob hauv Is Taws Nem ntawm Yam thiab cov khoom ntse & cov khoom siv yog qhov tseem ceeb hauv kev ntsuas kev cuam tshuam ntawm kev cuam tshuam ntawm lub tsheb ciav hlau tau txais los ntawm kev hloov hluav taws xob.
Ua tib zoo saib xyuas cov teeb meem ntawm EMS thiab xyuam xim rau cov teeb meem ntawm PCB tsim!
1. Qhov zoo ntawm kev tsim ntawm high-frequency transformer nyob rau hauv lub Circuit Court ntawm lub switching fais fab mov system muaj ib tug tej yam inhibitory nyhuv ntawm cov mem tes pab cuam cuam tshuam;
2. Lub jumper capacitance nruab nrab ntawm lub hauv paus Circuit Court thiab theem nrab Circuit Court ntawm lub switching fais fab mov system tuaj yeem muab txoj hauv kev rau cov hom kev cuam tshuam nkag mus rau theem nrab Circuit Court los ntawm lub hauv paus Circuit Court kom rov qab mus rau thawj circuit, yog li nws kuj muaj qee yam inhibitory. cuam tshuam rau kev cuam tshuam tawg;
3. Kev teeb tsa ntawm hom kev lim dej ntawm qhov tso zis kawg ntawm lub zog hloov hluav taws xob tuaj yeem cuam tshuam cov pab pawg mem tes cuam tshuam rau qee yam.
4. Lub voj voog ntawm lub zog hloov hluav taws xob nws tus kheej tsis muaj qhov cuam tshuam rau pawg pulse cuam tshuam, tab sis yog tias qhov kev teeb tsa ntawm lub zog hloov hluav taws xob tsis zoo, nws yuav ua rau muaj kev cuam tshuam ntawm kev hloov hluav taws xob los ntawm pawg pulse cuam tshuam. .
Tshwj xeeb, qhov tseem ceeb ntawm kev cuam tshuam tawg yog kev sib xyaw ua ke thiab kev cuam tshuam hluav taws xob. Txawm hais tias cov khoom siv lim tau siv los cuam tshuam cov kev cuam tshuam kev cuam tshuam, cov hluav taws xob cuam tshuam nyob ib puag ncig cov kab sib txuas tseem muaj nyob thiab tseem tuaj yeem dhau los ntawm kev hloov hluav taws xob. phem layout ntawm
(Yog hais tias lub hauv paus los yog theem nrab Circuit Court layout nyob deb ntawm lub switching fais fab mov ntev dhau lawm, ib tug "loj voj kav hlau txais xov" yuav tsim),
Cov hluav taws xob tiv thaiv hauv qhov induction tawg cuam tshuam cuam tshuam rau kev cuam tshuam kev cuam tshuam ntawm tag nrho cov cuab yeej.
