Unowana simba rekushandura rinoshandisa simba zvakanyanya uye kudzorwa kwakasimba kubva pane imwe tsika: enzanisa sarudzo yega yega yekugadzira nemutoro chaiwo, nzira chaiyo yekupisa, uye bhodhi chaiyo yaunogona kuvaka. Zvinangwa zviviri zvinotungamira basa rako. Unoda simba rekushandura rinoshandisa simba rakawanda raunogona kusvika. Unodawo voltage yekubuda kuti igare yakati sandara kana mutoro uchifamba. Zvinangwa izvi zvinodhonzerana. Kushanda zvakanyanya kunowanzoreva kushandura kwakawanda, uye kushandura kwakawanda kunogona kukanganisa kubuda. Basa rako nderekuenzanisa nedata, kwete kufungidzira. Masisitimu akanaka ekushandura simba anobva musarudzo dzakangwarira padanho rega rega. Kubudirira kwese mukushanda uye poindi yega yega yekutonga zvinoenderana nechiyero ichocho.
Zvitsva Zvitsva
Sarudza rudzi rwechinoshandura chakakodzera zvaunoda: buck inoderedza voltage, boost inoisimudza, uye buck-boost inobata ma inputs anochinja.
Shandisa switching regulator panzvimbo pe linear kana simba rawandisa kupfuura ma watts maviri. Izvi zvinochengetedza simba uye zvinoderedza kupisa.
Gadzira chitenderedzo chako kuti chive nemadhigirii makumi matanhatu echikamu chepakati. Izvi zvinobatsira kuchengetedza voltage yekubuda yakadzikama kana mutoro uchichinja.
Sarudza zvikamu zvakaita se inductors ne MOSFETs nekuyera zvinhu zvinochinjana , zvakaita se resistance uye gate charge, zvichienderana ne switching frequency yako.
Edza dhizaini yako nokungwarira nekuyera kwakarurama. Izvi zvinoita kuti zvinangwa zvekushanda zvakanaka uye mitemo zvirambe zviripo mukugadzirwa.
Simba rekushandura Topology Sarudzo
Kuchinjana kweBuck, Boost, uye Buck-Boost
Unotanga kusarudza topology ine zvinhu zvitatu zvinopinda: load profile, input-to-output voltage ratio, uye isolation needs. Regulator inoshanda zvakanyanya kana VIN yakaenzana neVOUT, uye inorasikirwa nekushanda zvakanaka sezvo chiyero ichocho chichikura. Ne input ichifamba pakati pe36 ne60V, bhazi re48V ndiro rakanakisa, nekuti rinotakura 4× less current pane 12V uye rinoderedza kurasikirwa kwePDN neinenge 16×. Input iyoyo inogona kuderera pasi pe48V, saka danho iri rinofanira kunge riri buck-boost.
Topology | Voltage Ratio | Isolation | Yakanyanya Kukodzera |
|---|---|---|---|
Buck | Matanho ekudzika | Aihwa | Njanji dziri nyore, dzisingadhuri; magetsi ekupinda asingachinji anokwidza EMI |
wedzera | Matanho ekuwedzera | Aihwa | Kuenderera mberi kweCCM current; inokodzera kugadziriswa kwesimba rinoshanda |
Buck-Boost | Matanho kumusoro kana pasi | Aihwa | Masisitimu anoshandisa bhatiri ane zvinopinda zvinodhonza |
MaBuck converters ndiwo ari nyore uye akachipa, uye anosvika pakushanda nesimba guru. MaBoost stages anotora continuous current muCCM, izvo zvinoita kuti ave akanaka pakugadzirisa simba rinoshanda. MaBuck-boost stages anobata kuchinja kwekupinda, asi anochinja kubuda uye switch yawo haina ground reference. Kana kushanda nesimba uye flexibility zvichikosha, maDC-dc converters anotsiva linear regulators. MaSolated regulated converters anosvika pakushanda nesimba zvakanyanya muzvitsigiro zvidiki.
Nheyo dzeKugadzirisa Zvinoenderana
Unofanira kuchinjana freewheeling diode neMOSFET kuti uderedze kurasikirwa kwe conduction pa low-voltage, high-current rails. Diode inodonhedza fixed forward voltage pane chero current. MOSFET inodonhedza current time RDS(on), saka kurasikirwa kunodzikira paunenge uchitenderedza zvishandiso kana kusarudza chikamu chine resistance yakaderera. Kuchinja uku kunowanzo sarudza kana power converter ichizadzisa chinangwa chayo chekushanda zvakanaka.
MaTopologies Akasiyana Uye Kana Uchida
Sarudza topology yakaparadzana kana zvichidikanwa nekuchengetedzeka kana kupatsanurwa kwepasi. Flyback ndiyo sarudzo iri nyore yakaparadzana ine simba shoma, asi haishande zvakanaka pamusoro pe10A. Forward converter inowedzera inductor yekubuda uye inobata ma currents ekubuda kwepamusoro zviri nani. Advanced power converter topology, kusanganisira two-switch buck-boost stages, inowedzera kushanda zvakanaka asi inodhura zvakanyanya.
Cherechedza: Kusashanda zvakanaka kwemagetsi kunowanzoreva kurasikirwa kwakanyanya, saka shandisa voltage inodonha senzira yekuchenjerera kushanda zvakanaka.
Kushanda Kwesimba Rekushandura uye Nzira Dzekurasikirwa
Kuchinja vs. Kurasikirwa Kwemutsetse
Linear regulator inochengetedza kubuda kwayo kwakadzikama nekuderedza voltage yakawedzerwa pakati pekupinda nekubuda. Load current inoyerera nemutoro nemutongi. Saka simba rinoraswa rinoenzana nekudonha kwevoltage nguva ye output current. Mumota yakajairika 5V regulator inopihwa kubva ku14.3V charging system, kudonha kwacho i9.3V. Pa1.0A mutoro unowana 5W nepo regulator ichipisa 9.3W, izvo zvinopa kushanda kweinenge 35%. Zvinhu zvinochinja zvinodzivirira kutambisa uku. Zvinocheka input uye zvinochengeta simba mu inductor, saka zvinorasikirwa nechikamu chidiki chete chesimba rinouya. Ndosaka switch-mode power supplies dzichisvika pakushanda kwepamusoro apo zvikamu zve linear hazvigone.
Parameter | Linear Regulator | Kuchinja Regulator |
|---|---|---|
kunyatsoshanda | Yakaderera (30–60% kana VIN iri pamusoro peVOUT) | Pamusoro (80–95%) |
Kunetseka kweropa | Yakakwira kana paine VIN-VOUT yakakura kana kuti current yakakwira | Yakaderera kune mutoro mumwe chete |
Mutoro wakajairika wazvino | Kusvika pa500 mA | 1 A kusvika 10 A zvichikwira |
Unofanira kubata mutemo we2W semuganho unoshanda. Verenga kurasikirwa se (VIN − VOUT) × IOUT. Kana mhedzisiro yacho iri pamusoro pe2W, sarudza switching regulator . Kana ikaramba iri pa2W kana pasi payo, chikamu chelinear chinogona kushanda neheatsinking chaiyo. Kupa 5V pa2A kubva pa12V nelinear regulator kunoparadza 14W, izvo zvisingashande. 90% switching stage inoshanda inorasa 1W pabasa rimwe chete.
Mota ye7805 inoshanda kubva pa12V pa500mA inogadzira kupisa kunopfuura 3.5W. Chikamu ichocho chinoda heatsink kana PCB iri nani.
Kurasikirwa Kwekurasikirwa Munzvimbo Yemutoro
Mazwi mana ekurasikirwa anoumba kushanda kwesimba rekushandura, uye rimwe nerimwe rinoyera nenzira yakasiyana. Kurasikirwa kwekufambisa kunokwira nechiyero chemagetsi emutoro, saka rinotonga pamutoro unorema. Kurasikirwa kwekuchinja kunoramba kwakaenzana nefrequency nevoltage yebhazi, uye rinotonga pamutoro wakareruka. Kurasikirwa kwegedhi-drive nefrequency uye gate charge. Kurasikirwa kweQuiescent kunoramba kwakasimba, saka zvinonyanya kukosha kana magetsi ekubuda ari madiki. Magadzirirwo epamusoro akaratidza kushanda kwepamusoro kwe99.1% nekubatanidza zvinhu zvitsva, topology, uye control.
Maitiro Ekushanda Nesimba Rekureruka
Pasi pePWM yakagadziriswa, nhamba yekuchinja inoramba yakafanana, saka kushandisa kwega kunoramba kwakafanana uye kushanda kwayo kunoderera pamagetsi mashoma. Maitiro ekuisa mwenje anogadzirisa izvi. Kudzora kweBurst, skip, uye PFM kunotambanudza nguva uye kunodzikisa huwandu hwezviitiko zvekuchinja panguva imwe neimwe. Pamutoro we1mA, PWM inomanikidzwa inopa kushanda kwe8% chete, nepo PFM ichisvika pa84%. PFM inobvisawo kurasikirwa kwemagetsi kwakanyanya uye inodzikisa gate-drive uye kurasikirwa nenguva yakafa. Kuona zero-crossing kunowedzera imwe purofiti nekudzima low-side FET kana inductor current ikaenda negative.
Zano: PFM inounza mafrequency akasiyana-siyana, ripple yakakwira, uye ruzha runogona kunzwika. Tarisa maitiro eEMI usati waita chibvumirano.
Dhizaini yeKudzora uye Kudzora Chivharo cheVoltage
Muripo weMhinduro uye Kugadzikana
Funga nezve control loop sechikamu chedhizaini yedhizaini yedc/dc iyo inosarudza kana kubuda kwacho kuchiramba kwakasimba kana kuti kuchizununguka. Chikamu chebuck, boost, kana buck-boost zvese zvinoda mabasa matatu akafanana kubva kune compensator. Chekutanga, high gain paDC inoshanda se integrator. Inosimudzira chero kukanganisa kwakagadzikana kusvika duty cycle yagadzirisa. Pasina iyo integrator, proportional-only control inosiya steady-state error. Chechipiri, zero mbiri dziri pedyo neLC resonance dzinosimudza phase pacrossover. Chechitatu, matanda maviri e high-frequency anocheka gain pamusoro pecrossover. Anoramba achichinja ripple uye injected noise kubva pakuchinja duty cycle.
Chinopa mari yerudzi rwechitatu (matanda matatu, zero mbiri) chinopa zvese zvitatu. Tafura iri pazasi inoratidza muenzaniso wemari yakashanda.
Kufungisisa | Kukosha / Kuiswa | chinangwa |
|---|---|---|
Kuyambuka kakawanda | 15 kHz (inenge fsw/10) | Mhinduro yekukurumidza yenguva pfupi mukati meaveraged-model validness |
Chinangwa chechikamu chemuganhu | ≥ 55° (dhizaini inosvika 60°) | Chenesa nzvimbo yemukati inochinja-chinja, ine chikamu chakasiyana |
Wana chinangwa chemari | 12 dB | Muganho wekudzivirira kunonoka kwechikamu cheparasitic |
Mazero emutsivi | 3.2 kHz uye 6.2 kHz | Dzorera anenge 38° echikamu panguva yekuyambuka |
Matanda ekugadzirisa | 75 kHz uye 145 kHz | Kurutsa gain kubva pamuromo; kuderedza ruzha uye ruzha |
Kutsvedza kwechiuno pa0 dB | −20 dB/gumi remakore | Kugadzikana kwecrossover imwe chete |
Padanho repamusoro rinoisa pfuti pamusoro pechinhu zvakananga. Paanenge 65° unoona pfuti yakawandisa uye ichidzikama mumatanho maviri. Pa45° yakawandisa inokwira kusvika pa20% nekurira kuri pakati nepakati. Pa25° inosvika pa50% nekurira kwenguva refu. Unofanira kunanga pa60° uye usambofa wakaderera pa45°, nekuti pfuti yakawedzerwa inonwisa mvura kubva pakupisa, zera, uye kusiyana kwekugadzirwa.
Chinotenderera chinoyera 60° yechikamu chepaseji pabhenji chinogona kuramba chichitenderera kana wangoisa firita yekuisa. Firita ne converter zvinodyidzana kuburikidza ne impedance, kwete kuburikidza ne loop yawakangobhadhara. Kukundikana ikoko kunoonekwa pa resonance yefirita (ona Middlebrook Stability Criterion).
Mhinduro Yenguva Pfupi uye Kunzwa Kure
Matanho ekumhanyisa mutoro, akadai se10 mA kusvika 500 mA mumasekonzi mashoma, anoda bandwidth ye "high loop", "fast error amplifier", uye "strong phase margin" pakati pe "load" uye "output capacitance". Unofanira kusarudza ma "low-ESR MLCCs" e "output". Kubhadhara kwakanyanya kunogona kukonzera kusagadzikana; kunonoka zvakanyanya kunoita kuti "overshoot" iwedzere uye iite "undershoot". Kukwidza "output capacitance" kunovandudza maitiro e "transient" asi kunodhura nzvimbo yebhodhi nenguva yekutanga. Imwe nzira inosundidzira "unity-gain frequency" yakakwira ne "constant-current" diki yeOTA ichityaira "high-impedance node", iyo inowedzera bandwidth nepo mamiriro e "load" asingakanganisi kugadzikana.
Kuti uwane mutsetse ne load regulated output kuburikidza ne long traces, wedzera remote sensing. Waya dze sense dzakatsaurirwa dzinobatanidza zvakananga kuma load terminals muKelvin connection, dzichiparadzanisa voltage detection kubva pa high-current path. Mitsetse iyoyo ine bias current diki chete, saka IR drop yavo haina basa. feedback loop inoenzanisa sensed voltage ne internal reference yayo uye inokwidza output kusvika load yaona set-point. Izvi zvinogadzirisa trace, cable, uye connector resistance, zvichipa regulation chaiyo uye simba rakagadzikana kunyangwe paine dynamic demand.
Zano: Dzorera mitsetse yepfungwa senzira yekubatanidza ma "differential pair" kubva kuma "switch nodes". Mutsetse wepfungwa une ruzha unokanganisa mutemo we "output-voltage" kupfuura chero shanduko ye "compensator" inogona kugadzirisa.
Kusarudzwa kweZvikamu Kuti Zvishande Zvakanaka
MaInductor, maCapacitors, uye maMOSFET
Unofanira kusarudza saizi yeinductor nekutarisa miganhu mitatu panguva imwe chete. Sarudza nominal inductance kubva pa ripple factor pakupinda kwakanyanya uye light load, wobva watenderedza kusvika padanho repedyo. Tarisa saturation current pa30% roll-off uchienzaniswa ne peak current, uye chengeta 20–30% margin. Iva nechokwadi chekuti rated current inofukidza RMS value, uye verenga DC-bias uye temperature-rise curves usati wasarudza.
Sarudzo ye capacitor inobuda inowanzo tevera danho rekurema, kwete ripple. Kunyura kwe3% transient kunogona kuda capacitance yakawanda kupfuura bhajeti re ripple re1%. Tarisa ESR, RMS ripple current, uye saizi yepakeji pamwe chete.
Kusarudzwa kweMOSFET kunoenderana , kwete kumhanya kusvika padanho repasi reRDS(on). Gate charge inokura nehukuru hwe die, saka chikamu chisingapindi simba chinowanzova neQg yakakwira uye chinononoka kuchinja. Yera RDS(on) uchienzanisa neQg neMiller charge pa frequency yako yakatarwa.
Sarudzo yemudziyo | simba | Tengesa |
|---|---|---|
MOSFET yakaderera (yakadzika) yeRDS | Kurasikirwa kwemuchina wakaderera | Qg yakakwirira, mipendero inononoka |
MOSFET yeQg yakaderera | Kukurumidza kushandura | Kurasikirwa kwakanyanya kwekufambisa |
Vatongi uye Vatyairi veGedhi
Voltage yepamusoro yegedhi, yakaita se +15V/-5V, inoita kuti gedhi rishande zvakanaka uye rinodzivirira gate oxide. Inodawo kudzorwa kwakasimba kubva kudhiraivha. Kudzora gate kunoshanda kunoumba dI/dt uye dV/dt kuderedza kurasikirwa kweswitching uku uchichengetedza EMI ichidzora, asi inodhura sensing bandwidth uye inowedzera kuomarara.
Tarisa jira repagedhi. Kupinda kweparasitiki kunokonzera kurira uye kurira kwenhema, izvo zvinowedzera kurasikirwa. Chengeta zviratidzo zviri pedyo, shandisa Kelvin source, uye isa divi rekubatanidza pedyo nemutyairi.
Zano: Kurasikirwa kwechaji yegedhi kudiki kana tichienzanisa nehukuru hwesimba, asi kunodziisa mutyairi neRg yekunze. Ipa zvikamu izvozvo nzvimbo yekupisa.
Mapakeji Akaiswa muPakeji eVatongi Vakabatanidzwa
Ma "inductors" e "magnetic core" akabatanidzwa mupakeji isarudzo itsva ye "buck integrated voltage regulators". Zvitsuwa zvakabatana zvakasimba zvinosimudzira inductance density kusvika 250 nH/mm² uye current density kusvika 10 A/mm². Mu "10-module converter" pa40 A, "coupled arrays" yakawana avhareji yekushanda zvakanaka ne5.65% pane "uncoupled baselines", nema "modules" akanakisa achisvika 11.04%.
Izvi zvinokosha pakushandura simba zvine simba guru muzvitima zvinodzika-dzika, zvakaita se12 V kusvika 1 V. Kuisa mapassives mupakeji kunosimudzira kushanda zvakanaka kana nzvimbo yebhodhi yakabatana. Bata zvikamu izvi senzira yekugadzira masisitimu ekushandura simba anoda kuendeswa kwakasimba uye kwakanaka.
Kushanda zvakanaka, saizi, uye EMI Kuchinjana
Kuchinja Mafambiro uye Kutarisira Kupisa
Unotanga wasarudza frequency yekuchinja, nekuti inokanganisa dzimwe sarudzo dzese. Frequency yakakwira inoita kuti ma inductor, ma capacitor, nema filters ave madiki, uye inowedzera simba remagetsi. Kuchinja kumwe chete ikoko kunowedzera zviitiko zvekuchinja zvakawanda sekondi yega yega, saka kurasikirwa kunokwira uye kushanda zvakanaka kunogona kudzikira kana dhizaini yekupisa isina kusimba. Dhizaini yakapinza ye dv/dt uye di/dt inowedzerawo ruzha rwakagadzirwa uye runobuda. Unoda kurongeka kwakasimba, kusefa kuri nani, uye kugadzirisa gate-drive nekungwarira.
Design Priority | Mhedzisiro yeHigher Switching Frequency |
|---|---|
kunyatsoshanda | Kuchinjana kwakawanda kuri kuitika sekondi yega yega; kushanda zvakanaka kunogona kudzikira pasina dhizaini yakasimba yekupisa |
Saizi Yemhinduro | Ma "passive" madiki uye simba rakawanda; ma "passive" anova anonyanya kunzwisisika uye anodhura zvakanyanya |
Micheto yakapinza inomutsa ruzha; inoda kurongeka kwakasimba, kudzivirira, uye kusefa | |
Thermal | Zvinodiwa zvakanyanya pakugadzirisa tembiricha yejoinha uye kuderedza tembiricha |
Fungidzira kurasikirwa kwekuchinjana pahuwandu hwesarudzo yako, wobva watarisa nzvimbo yekupisa mumodule uye heatsink. Simbisa dv/dt uye di/dt kudzora njodzi yeEMI, gadzirisa, wodzokorora. Simbisa nekushandisa simulation, thermal test, EMI scan, uye load test usati wapedza.
Zano: Kuwanda kweEMI pabhenji kunogona kuramba kuchikundikana muchinhu chakavharirwa nesimbi. Skena nekukurumidza.
Nzvimbo yemhangura neDFM Zvipingamupinyi
Ronga nzira yekupisa usati waenda. Thermal via arrays inotakura kupisa kubva pamusoro pezvikamu kuenda mukati kana kumashure kwemhangura, uye ma vias akazadzwa kana akavharirwa anodzivirira kupwanyika kwe solder. Mhangura yakakura inocheka kupisa kunodzivirira uye inoparadzira kupisa padivi. Mari dzemhangura nesimbi dzakadzivirirwa dzinoshandira michina iyo kuburikidza ne arrays inokundikana. Boka ma vias mumapurazi, uye tevera IPC-7093 yemapakeji akadzimwa pasi uye IPC-2152 yehupamhi hwekutakura magetsi.
DFM inobva yaganhurira hurongwa hwayo. Nzvimbo huru dzemhangura dzinodhonza kupisa kubva pamitsetse yesolder panguva yekuyererazve kwemvura, saka saizi inodururwa ichitenderedza nzira chaiyo yekupisa. Deredza solder paste kuti chikamu chisayangarara. Chengeta madonhwe emagetsi ane simba guru kure nemasensa nemaop-amps.
Mutengo uye Kuchinjana kweBOM
Kuderera kwemafrequency kunoita kuti kudzorwa kweBOM neEMI kusadhure. Kukwira kwemafrequency kunogona kuwedzera mutengo kuburikidza nemidziyo yepamusoro uye kudzorwa kweEMI kwakasimba. Yera sarudzo yega yega zvichienderana neprofile yako yemutoro, kwete zvichienderana nenhamba yepamusoro yedatasheet.
Cherechedza: Kubudirira kwese kwese mukushanda kwepamusoro kunodhura nzvimbo yebhodhi, mutengo, kana EMI margin pane imwe nzvimbo.
Kuitwa uye Kuedzwa kweBoard-Level
Kurongeka kweHot Loop uye Switch Node
Chinoyerera chinopisa inzira ine simba guru inotakura magetsi anochinja. Nzvimbo yacho inoisa parasitic inductance, uye parasitic inductance sets ringing, overshoot, uye EMI. Unofanira kuisa ma capacitor ekupinda nekupatsanura mamirimita kubva paMOSFET half-bridge. Nzvimbo diki ye loop inoderedza loop inductance uye inoderedza overshoot yemagetsi. Chinoyerera chakanangana nemagetsi mubhodhi rine layer yakawanda chinoderedza nzvimbo ye loop zvakanyanya, uye ma layouts akadai akashuma kudzikira kwe overshoot kusvika pa 4 V zvichienzaniswa nema layouts akajairwa.
Chiito Chekugadzira | Inoshanda Kuna | Migumisiro |
|---|---|---|
Ma capacitor ari pedyo neMOSFET | Chinodziya | Inoderedza nzvimbo ye loop, inoderedza inductance |
Chinotenderera chesimba chakamira muPCB ine layer yakawanda | Chinodziya | Inocheka nzvimbo yedenderedzwa uye inodarika |
Mabhazi ane laminated eDC-link | Chinodziya | Inodzivirira V_DS kupfura zvakanyanya pakudzimwa kwemhepo |
Zvidimbu zvegedhi zvakamanikana, zvakaparadzana | Chinja node | Inomisa kutendeuka kwenhema kubva pakubatanidza kweMiller |
Kubatanidzwa kwesimba rekushandisa mumidziyo yakafanana | Chinja node | Inodzivisa kugovana kwemagetsi zvisina kuenzana |
Unofanirawo kuchengetedza mareferensi asina kutyoka uye kuchengetedza nzvimbo dzine ruzha dzichichinja kure nenzvimbo dzinonzwisisika dzeanalog. Matanho aya anodzora ruzha rwakakwira rwe dv/dt ne di/dt uye anodzivirira kudzoka kwechiratidzo.
Kuyera uye Kusimbisa
Data rebhenji rinobatsira chete kana gadziriro yacho iri yechokwadi. Kukanganisa kwekugadzirisa kunowedzera nekuverenga, saka manhamba makuru ane zvikanganiso zvakakura. Zero offset inowedzera kukanganisa kunogara kuchikanganisa kuverenga kudiki zvakanyanya. Kufamba kwemidziyo, nguva yekunonoka, uye hysteresis zvese zvinoguma nekuchinja. Unofanira kudzoreredza zero pamita pakutanga, kumirira kugadzikana usati waverenga, uye kutsvaira nenzira imwe chete.
Mistake | Kukanganisa Kwazvinoita Kuverenga | Nzira Yokudzivisa nayo |
|---|---|---|
Calibration kukanganisa | Inokura nekukosha kwakazara | Simbisa uchienzanisa nereferensi chaiyo |
Zero offset | Kukanganisa nguva dzose, kwakaipisisa pazvidiki | Dzokorora zero wobva wanyora offset |
Nguva yekunonoka / hysteresis | Kuverenga kwekutanga kunowanzo kwira zvakanyanya kana kuti pasi | Mirira kugadzikana; tsvaira divi rimwe chete |
Ruzha rwezvakatipoteredza | Mhedzisiro ye "drafts" uye "vibration bias" | Dzivirira kana kudzora nzvimbo yekushandira |
Simbisa matanho emutoro wenguva pfupi, mutemo wemutsetse nemutoro, uye kushanda zvakanaka usati wagadzira vhoriyamu. Yeuka kuti mutemo nekurasikirwa zvinofamba pamwe chete. Transformer ine 7% impedance yakaratidza kurasikirwa kwemutoro kwe11 kW uye kushanda zvakanaka kwe98.6%, ichipesana ne8 kW uye 98.9% pa5% impedance. Kusashanda zvakanaka zvinoreva kurasikirwa kwakanyanya, saka shandisa drifting output voltage senyevero nezvekushanda zvakanaka kwesimba.
Zano: Tora kuverenga kwakawanda pahuwandu hwakakura. Kuchinja kwausati wamboyera ndiko kuchinja kwausingakwanise kugadzirisa.
Kuchinja simba zvine simba uye kudzorwa kwakasimba kunobva mucheni imwe chete yakabatana: topology, control loop, zvikamu, marongerwo, thermal design, uye DFM zvese zvinoenderana nemiganhu yako chaiyo. Haugone kudzivirira kuchinjana. Dhizaini yakanakisisa inoenderana neprofile yako yemutoro, thermal envelope, uye cost target, kwete datasheet peak.
Cherechedza: Data rebhenji rinokunda fungidziro nguva dzese. Yera, dzokorora, wobva waongorora usati wagadzira vhoriyamu.
Tora kuwedzera kwese mukushanda kwesimba semhedzisiro yakayerwa, kwete tariro. Kushanda nesimba kwekushandura simba kunoita kuti uwane simba rakavimbika. Vaka magetsi akavimbika nenzira imwecheteyo, chiyero chimwe chete chakavimbika panguva, uye zvinangwa zvako zvekushanda zvakanaka uye zvemitemo zvichashanda mukugadzirwa.
FAQ
Unosarudza sei pakati pebuck, boost, uye buck-boost?
Tanga nezvinhu zvitatu zvinopinda: load profile, input-to-output voltage ratio, uye solation needs. Sarudza buck yekudzika, boost yekukwira, uye buck-boost kana input ikadonha pamusoro nepasi pe output. Wedzera topology yakaparadzana chete kana kuchengetedzeka kana kuparadzaniswa kwepasi kuchidikanwa.
Unofanira kushandisa linear regulator kana switching converter here?
Verenga kurasikirwa se (VIN − VOUT) × IOUT. Kana mhedzisiro yacho ikaramba iri pa2W kana pasi payo, chikamu chakatsetseka chinogona kushanda nekupisa kwakakodzera. Pamusoro pe2W, chinja kuenda kudanho rekuchinja. Linear regulator inopihwa kubva mukupinda kwakanyanya inopisa simba rakawanda rinounzwa sekupisa.
Unoita sei kuti chitenderedzo chemuchina chirambe chakasimba?
Vavarira kusvika pa 60° ye phase margin uye usambofa wakadonhera pasi pe 45°. Isa crossover pedyo nechikamu chimwe mugumi che switching frequency, uye shandisa Type III compensator kusimudza phase paLC resonance. Wobva watarisazve kugadzikana ne input filter yako yakabatana.
Zano: Chinotenderera chinotaridzika zvakanaka pabhenji chinogona kurira kana firita yekuisa yashanda nayo.
Sei kushanda zvakanaka kuchiderera kana mutoro wakareruka?
Fixed-frequency PWM inoramba ichichinja-chinja nekukurumidza zvisinei nekuti mutoro wacho mudiki sei, saka kushandisa wega kunoramba kuripo. Burst, skip, uye PFM modes zvinoderedza huwandu hwezviitiko zvekuchinja-chinja uye zvinodzoreredza kurasikirwa kwakawanda. Tarisa EMI uye ripple usati wazvibvumira.
Ramba uchiyera, ramba uchidzokorora, uye zvinangwa zvako zvekushanda zvakanaka uye zvemitemo zvicharamba zviripo mukugadzirwa.
