ziviso
Muchinyorwa chino chekutanga, tichataura nezve chiitiko cheinductor mune switch mode magetsi ekupa. Kana iwe uri mutsva kumagetsi ekugadzira dhizaini uye uri kushamisika kuti sei diode ichiita kunge iri kumberi-yakarerekera asi ichiita senge isingafanirwe kudaro, saka mune mukana wese, imhaka yeinductor. Ichi chinyorwa ndechenyu.
Kunzwisisa Inductors
Pakutanga, takadzidza inductors kuyunivhesiti, zvese muAC uye DC maseketi. Mudunhu re AC, tinopa inductor sinusoidal kupinza uye kuona shanduko muamplitude uye chikamu. Mudhipatimendi reDC, tinopa danho rekupinza uye kudzidza shanduko inokonzeresa mune yazvino kana voltage pane inductor.
Nekudaro, maitiro einductor mune switch mode magetsi anosiyana zvakanyanya kubva nyore AC kana DC maseketi akadzidzwa kuyunivhesiti.
Basic Inductor Principles
An inductor anogara achiedza kuchengetedza ikozvino inoyerera kuburikidza nayo. Inopikisa chero shanduko mune ikozvino nekugadzira kumashure EMF. Semuenzaniso, kana paine 1A inoyerera kuburikidza neinductor uye shanduko yakaedzwa, iyo inductor inogadzira kumashure EMF kupikisa shanduko iyi. Iyi nheyo inogona kufananidzwa nokusunda motokari inorema kuti irege kuzorora—inodzivisa kufamba kwokutanga, uye kana yangofamba, inodzivisa kumira.
Inductor mune DC Circuit
Funga nezveyakareruka DC sedunhu ine 1V bhatiri, switch, 1-ohm resistor, uye inductor. Pakutanga, hapana ikozvino inoyerera kuburikidza ne inductor. Kana switch yakavharwa, 1V inoshandiswa, uye ikozvino inotanga kuyerera. Iyo inductor inopesana neshanduko kubva ku0A kuenda ku1A nekugadzira kumashure EMF yakaenzana neyakaiswa voltage (1V). Izvi zvinogadzira kukwira kwelogarithmic mune zvazvino kuburikidza neinductor nekufamba kwenguva.
Inductor muSwitching Power Supply
Mune magetsi, kuramba kunenge zero ohms, uye yazvino haiteveri yakafanana logarithmic curve. Pane kudaro, inosimuka mumutsara wakatwasuka, ichiita triangular current waveform. Kubatidza nekudzima zvazvino zvinobuda muchimiro chetriangular ichi, chinorerutsa kuongororwa uchishandisa equation yemutsara wakatwasuka (y = mx + c).
Muenzaniso Kuongorora Kwedunhu
Ngatifungei dunhu rine 1V sosi, switch, 1-ohm resistor, inductor, uye imwezve 2-ohm resistor inodzorwa neimwe switch. Kana shanduko yekutanga yakavharwa, ikozvino inokwira ku1A. Kana shanduko iyi yakavhurwa uye yechipiri switch yakavharwa panguva imwe chete, inductor inomanikidza ikozvino kufamba nenzira itsva ine 3 ohms yekupikisa, ichigadzira kumashure EMF ye3V kuchengetedza 1A ikozvino kuyerera.
Mechanical vs. Semiconductor Swichi
Mechanical switches inogona kuvhurika ipapo, ichigadzira yakakwira kumashure EMF inogona kuionize mweya uye kukonzera sparks. Ichi ndicho chikonzero iyo AC voltage rating ye switch yakakwira kupfuura iyo DC rating. Semiconductor switch, zvisinei, inotora nguva inogumira kuvhura nekuvhara, inokanganisa maitiro einductor. Iyo yakajairwa equation yeinductor kumashure EMF iE = -L (di/dt), yakabva mumitemo yaFaraday neLenz.
Inductor Behaviour muPictical Power Supplies
Mumagetsi anoshanda emagetsi, kukurumidza kuchinjika kweMOSFET kunogona kugadzira hombe voltage spikes nekuda kwekukwira kwe di/dt kukosha. Semuyenzaniso, kuchinja kubva pa10A kuenda ku0A mugumi nanoseconds kunogadzira kumashure hombe EMF, ichiratidza seruzha uye spikes.
mhedziso
Muchinyorwa chino, takakurukura maitiro emainductors muDC-DC switch mode magetsi, iyo triangular chimiro chazvino, kutungamira kweEMF yekumashure, uye kukanganisa kweiyo high di/dt pane voltage spikes.
