Hwj chim-Mov Yam ntxwv

hwj chim-mov yam ntxwv

Muaj ntau ntau lub hwj chim-mov yam ntxwv uas cuam tshuam rau lawv lub lag luam:

Drift:  Lub variation nyob rau hauv dc tso zis voltage raws li ib tug muaj nuj nqi ntawm lub sij hawm ntawm qhov kab voltage, load, thiab ambient kub.

Dynamic teb:  Ib tug fais fab mov tej zaum yuav ua hauj lwm nyob rau hauv ib tug system nyob qhov twg muaj ib tug yuav tsum tau muab ceev ceev dynamic lo lus teb rau ib tug kev hloov nyob rau hauv load lub hwj chim. Qhov ntawd yuav ua tau cov ntaub ntawv rau lub load ntawm high-ceev Microprocessors nrog lub hwj chim tswj kev khiav dej num. Nyob rau hauv cov ntaub ntawv no, lub microprocessor tej zaum yuav nyob rau hauv ib tug standby lub xeev thiab raws li thaum hais kom nws yuav tsum pib los yog tua tam sim ntawd, uas imposes siab dynamic currents nrog ceev ceev nruab nrab kem nqi rau cov fais fab mov. Yuav kom haum raws li tus microprocessor, lub mov tus tso zis voltage yuav tsum kev nce mus saum kev loj li los yog cia nyob rau hauv ib lub sij hawm luv, tab sis tsis muaj ntev li overshoot. 

Efficiency:  piv ntawm cov zis-rau-tswv yim muaj hwj chim (nyob rau hauv feem pua), ntsuas ntawm ib tug muab load tam sim no nrog nominal kab mob (pout / Pin).

Holdup lub sij hawm:  lub sij hawm thaum lub sij hawm uas ib lub hwj chim mov tus tso zis voltage tseem tsis pub dhau specification nram qab no rau hauv lub poob ntawm cov tswv yim muaj hwj chim.

Inrush tam sim no:  Ncov instantaneous tswv yim tam sim no kos los ntawm ib lub hwj chim mov ntawm turn-on.

International qauv:  Qhia kom meej ib lub hwj chim mov kev nyab xeeb uas yuav tsum tau thiab pub EMI (electromagnetic cuam) theem. 

Rho tawm:  Hluav taws xob cov sib cais ntawm lub tswv yim thiab tso zis ntawm ib lub hwj chim mov ntsuas nyob rau hauv volts. Ib tug uas tsis yog-cais muaj ib tug dc txoj kev nyob nruab nrab ntawm lub tswv yim thiab tso zis ntawm mov, whereas tug raug rho tawm fais fab mov ntiav ib transformer mus tshem tawm cov dc txoj kev nyob nruab nrab ntawm cov tswv yim thiab cov zis.

Kab cai:  Hloov tus nqi ntawm dc tso zis voltage uas ua los ntawm ib tug kev hloov nyob rau hauv ac tswv yim voltage, teev raws li cov kev hloov nyob rau hauv ± MV los yog ±%.

Load cai:  Hloov tus nqi ntawm dc tso zis voltage uas ua los ntawm ib tug kev hloov nyob rau hauv load los ntawm qhib-Circuit Court ntau-rated tso zis tam sim no, teev raws li cov kev hloov nyob rau hauv ± MV los yog ±%.

Tso zis suab nrov:  Qhov no yuav tshwm sim nyob rau hauv lub hwj huam mov nyob rau hauv daim ntawv ntawm luv luv bursts ntawm siab zaus zog. Lub suab nrov yog tshwm sim los ntawm them thiab ntxub ntawm cab capacitances hauv lub hwj huam mov thaum lub sij hawm nws khiav hauj lwm mus los. Nws amplitude yog nce mus nce los thiab yuav yog nyob ntawm seb load impedance, lwm filtering, thiab yuav ua li cas nws yog ib qhov kev ntsuas. 

Tso zis voltage trim:  Most power supplies have the ability to “trim” the output voltage, whose adjustment range does not need to be large, usually about ±10%. One common usage is to compensate for the dc distribution voltage drop within the system. Trimming can either be upward or downward from the nominal setting using an external resistor or potentiometer.

Periodic thiab random sib txawv (PARD): pliaj periodic (ripple) los yog aperiodic (suab nrov) sib txawv ntawm lub hwj chim-mov tso zis voltage los ntawm nws cov nominal tus nqi. PARD yog qhia nyob rau hauv MV ncov-rau-ncov los yog rms, nyob qee bandwidth.

Ncov tam sim no:  Qhov siab tshaj plaws tam sim no hais tias ib lub hwj chim mov yuav muab rau nyuag sij hawm. 

Ncov hwj chim:  Lub meej tshaj plaws tso zis ntau zog uas ib lub hwj chim mov yuav ua tau tsis muaj kev puas tsuaj. Nws yog feem ntau zoo tshaj tus nruam txhim khu kev qha tso zis ntau zog muaj peev xwm ua thiab yuav tsum tsuas yog siv ncaw.

Fais fab mov sequencing:  Tshwm Sim Los Muaj turn-on thiab off of khoom siv fais fab tej zaum yuav tau nyob rau hauv nruab nrog ntau yam kev khiav hauj lwm voltages. Hais tias yog, voltages yuav tsum tau thov nyob rau hauv ib lub ib theem zuj zus, txwv tsis pub lub kaw lus yuav yuav puas ntsoog. Piv txwv li, tom qab ua ntawv thov cov thawj voltage thiab nws nce mus txog ib lub nqi, ib tug thib ob voltage yuav ramped li, thiab thiaj li nyob. Sequencing ua hauj lwm nyob rau hauv rov qab thaum fais fab yog muab tshem tawm, txawm hais tias ceev yog tsis feem ntau raws li ntau ntawm ib qho teeb meem raws li turn-on.

Tej thaj chaw deb rau / tawm:  Qhov no yog dua keyboards tig khoom siv fais fab rau hauv thiab tawm. Fais fab mov cov ntaub ntawv-daim ntawv specifications feem ntau nthuav dav cov dc tsis rau tej thaj chaw deb rau / tawm, sau cov rau hauv thiab tawm logic theem yuav tsum tau.

Tej thaj chaw deb kev txiav txim zoo:  A raug fais fab mov tsom kwm nws tso zis voltage thiab pub tau ib feem ntawm nws rov qab mus rau lub mov los muab voltage kev cai. Nyob rau hauv no txoj kev, yog hais tias tus tso zis nyhav sawv los yog poob, lub tswv yim regulates lub mov tus tso zis voltage. Txawm li cas los, kom muaj ib tug tsis tu ncua tso zis thaum lub load, lub hwj huam mov yuav tsum tau saib xyuas cov voltage ntawm lub load. Tab sis, kev sib txuas los ntawm ib lub hwj chim mov tus tso zis rau nws load muaj kuj thiab tam sim no ntws los ntawm lawv uas ua ib tug voltage nco uas tsim ib tug voltage txawv ntawm cov mov cov zis thiab lub sij load. Rau cov pom kev cai, lub voltage noj rov qab mus rau lub hwj huam mov yuav tsum yog tus tiag tiag load voltage. Cov mov ob (ntxiv thiab rho tawm) tej thaj chaw deb kev txiav txim zoo sib txuas saib xyuas lub sij load voltage, ib feem ntawm uas yog ces noj rov qab mus rau lub mov nrog heev me ntsis voltage nco vim hais tias tam sim no los ntawm ob lub tej thaj chaw deb kev txiav txim zoo sib txuas yog tsawg heev li. Raws li ib tug tsim nyog tau, qhov voltage thov mus rau load yog tswj.

Ripple:  muab daws kom tiav thiab filtering ib switching fais fab mov tus tso zis tau nyob rau hauv ib tug ac tivthaiv (ripple) uas caij rau nws dc tso zis. Ripple zaus yog ib co tseem ceeb heev ntau ntawm cov converter lub switching zaus, uas yog nyob rau hauv lub converter topology. Ripple yog tus unaffected los ntawm load tam sim no, tiam sis yuav tsum poob los ntawm lwm capacitor filtering.

Mus txog qhovtwg:  Thaum uas siv cov ntau yam tso zis khoom siv fais fab uas ib tug los yog ntau tshaj outputs ua raws li lwm nrog kev hloov nyob rau hauv kab, load, thiab kub, yog li ntawd txhua koom tes rau tib proportional tso zis voltage, tsis pub dhau teev mus txog qhovtwg kam rau ua, nrog rau kev hwm mus ib qho muaj nuj nqis.


Post lub sij hawm: Apr-23-2018
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