Ripple nrov yog hais txog me me amplitude, hloov pauv sai hauv cov zis hluav taws xob ntawm lub zog hluav taws xob. Cov kev hloov pauv no feem ntau yog cov khoom siv AC superimposed ntawm DC tso zis. Vpp (peak-to-peak voltage) sawv cev rau qhov siab tshaj plaws voltage amplitude ntawm lub suab nrov ripple, ntsuas raws li qhov sib txawv ntawm qhov siab tshaj plaws thiab qis tshaj ntawm lub waveform.
Hauv kev tsim hluav taws xob tsim hluav taws xob thiab kev siv cov khoom siv hluav taws xob, ripple suab nrov yog qhov tseem ceeb heev. Ripple suab nrov yog feem ntau qhia raws li lub ncov-rau-peak voltage (Vpp). Qhov parameter no yog qhov tseem ceeb rau kev ua haujlwm zoo thiab kev ua haujlwm ruaj khov ntawm cov khoom siv. Kab lus no yuav tham txog lub ntsiab lus, ua rau, cuam tshuam, thiab kev txo qis rau cov suab nrov nrov.
Ua rau Ripple Noise
1. Rectification thiab Lim: Hauv kev hloov cov khoom siv hluav taws xob, AC input voltage hloov mus rau DC voltage los ntawm kev hloov kho thiab lim. Cov txheej txheem rectification generates ripple voltage, uas, yog tias tsis txaus lim, tau txais superimposed ntawm cov zis voltage.
2. Hloov zaus: Hloov cov khoom siv hluav taws xob siv hluav taws xob hloov hluav taws xob los tswj cov zis hluav taws xob. Qhov no high-frequency switching qhia high-frequency ripple thiab suab nrov rau hauv cov zis voltage.
3. Parasitic Parameters: Parasitic inductance, capacitance, thiab kuj nyob rau hauv Circuit Court kuj tuaj yeem ua kom paub ripple thiab suab nrov.
4. Load Variations: Cov kev hloov pauv ntawm cov khoom thauj tam sim no tuaj yeem ua rau cov lus teb tsis ntev los no hauv cov khoom siv hluav taws xob, ua rau muaj kev sib tw thiab suab nrov.
Kev cuam tshuam ntawm Ripple Noise
1. Kev ua tau zoo ntawm cov cuab yeej: Lub suab nrov nrov tuaj yeem ua rau muaj kev ua haujlwm tsis zoo lossis ua kom tsis zoo ntawm cov khoom siv hluav taws xob uas xav tau lub zog zoo.
2. Teeb liab kev ncaj ncees: Ripple nrov tuaj yeem cuam tshuam nrog cov teeb liab ua circuits, txo cov teeb liab kev ncaj ncees thiab raug.
3. Electromagnetic cuam tshuam (EMI): Cov suab nrov nrov nrov tuaj yeem cuam tshuam electromagnetic cuam tshuam, cuam tshuam rau kev ua haujlwm ib puag ncig ntawm cov khoom siv hluav taws xob.
Yuav Ua Li Cas Txo Ripple Noise
1. Ntxiv Filtering Capacitor: Ntxiv cov khoom lim dej kom tsim nyog ntawm cov khoom siv hluav taws xob tuaj yeem txo cov suab nrov nrov.
2. Siv Cov Lim Lim Zoo Tshaj Plaws: Siv cov khoom siv lim dej ntau dua, xws li LC lim lossis π lim, tuaj yeem tshem tawm cov suab nrov zoo dua.
3. Txhim kho PCB Tsim: Optimizing PCB layout kom txo tau cov kab mob parasitic inductance thiab capacitance, thiab ntxiv cov dav hlau hauv av thiab thaiv cov khaubncaws sab nraud povtseg tuaj yeem txo cov suab nrov.
4. Xaiv Cov Cheeb Tsam Tsis Txaus Ntsig: Siv cov khoom siv suab nrov qis thiab cov khoom siv hloov pauv tuaj yeem txo cov suab nrov hauv lub hauv paus.
5. Siv Cov Txheej Txheem Ua Haujlwm Zoo: Siv cov kev ua haujlwm siab linear regulators los yog cov suab nrov qis qis tuaj yeem txo cov zis ripple thiab suab nrov.
Ripple nrov Vpp yog qhov tseem ceeb rau kev ntsuas qhov ruaj khov thiab purity ntawm lub zog hluav taws xob tso zis hluav taws xob. Kev nkag siab txog cov peev txheej thiab qhov cuam tshuam ntawm lub suab nrov nrov, thiab siv cov kev ntsuas kom txo tau nws, yog qhov tseem ceeb rau kev ua haujlwm zoo thiab ruaj khov ntawm cov khoom siv hluav taws xob. Los ntawm kev ntxiv cov lim capacitors, optimizing Circuit Court tsim, thiab xaiv cov suab nrov qis, ripple suab nrov tuaj yeem txo qis, yog li txhim kho cov cuab yeej kev ntseeg siab thiab kev ua haujlwm.
