Sei Ndichida "0 Ohm Resistor"?

Iyo 0 Ohm resistor ndeye yakakosha resistor iyo inofanirwa kushandiswa kune akati wandei maapplication.Saka, isu tiri chaizvo mukuita redunhu dhizaini kana kazhinji inoshandiswa kune yakakosha resistor.0 ohm resistors inozivikanwawo sejumper resistors, ndeye yakakosha chinangwa resistors, 0 ohm resistors kuramba kukosha haisi zero chaiyo (ndiyo superconductor yakaoma zvinhu), nokuti pane kuramba kukosha, asiwo uye zvekare chip resistors vane kukanganisa kwakafanana. chokwadi chechiratidzo ichi.Vagadziri veResistor vane matanho matatu echokwadi e0-ohm chip resistors, sezvakaratidzwa mumufananidzo 29.1, ari F-faira (≤ 10mΩ), G-faira (≤ 20mΩ), uye J-faira (≤ 50mΩ).Mune mamwe mazwi, kukosha kwekupikisa kwe0-ohm resistor ishoma pane kana kuenzana ne50 mΩ.imhaka yemhando yakakosha ye0-ohm resistor iyo kukosha kwayo kwekupokana uye kurongeka kunoratidzwa nenzira yakakosha.iyo ruzivo rwemudziyo we0-ohm resistor yakanyorwa neaya ma parameter, sezvakaratidzwa mumufananidzo.

Isu tinowanzoona 0 ohm resistors mumasekete, uye kune vatsva, inowanzovhiringidza: kana iri 0 ohm resistor, iri waya, saka sei kuiisa?Uye inopikisa yakadaro iripo pamusika?

1. Basa re 1.0 ohm resistors

Muchokwadi, 0 ohm resistor ichiri kubatsira.Pane zvimwe mabasa akawanda sezvinotevera.

a.Kushandiswa sewaya yekusvetuka.Izvi zvese zvinoyevedza uye zviri nyore kuisa.Ndiko kuti, patinopedzisa dunhu mukugadzirisa kwekupedzisira, inogona kubviswa kana kupfupiswa, panguva iyo 0-ohm resistor inoshandiswa sejumper.Nekuita izvi, zvinogona kudzivirira shanduko yePCB.Kana isu bhodhi redunhu, tingangoda kuita dhizaini inoenderana, tinoshandisa 0 ohm resistors kuti tiwane mukana wenzira mbiri dzekubatanidza wedunhu.

b.Mumaseketi akasanganiswa akadai sedhijitari uye analogue, zvinowanzodiwa kuti zvikonzero zviviri izvi zvisiyane uye zvakabatana pane imwe nzvimbo.Panzvimbo yekubatanidza zvikonzero zviviri zvakananga pamwechete, tinogona kushandisa 0 ohm resistor kubatanidza zvikonzero zviviri.Kubatsira kweizvi ndechokuti ivhu rakakamurwa kuita mambure maviri, izvo zvinoita kuti zvive nyore zvikuru kubata pakuisa mhangura pamusoro penzvimbo huru, etc. Uye isu tinogona kusarudza kana kupfupisa ndege mbiri dzepasi kana kwete.Sechinoti chepadivi, zviitiko zvakadaro dzimwe nguva zvakabatana nemainductors kana magineti bead nezvimwe.

c.Zvemafusi.Nekuda kweiyo yakakwira fusing ikozvino yePCB alignment, zvakaoma kusanganisa muchiitiko chepfupi-circuit overcurrent uye zvimwe zvikanganiso, izvo zvinogona kutungamirira kunjodzi huru.Sezvo iyo 0 ohm resistor yazvino inomira simba ishoma (chaizvoizvo, 0 ohm resistor iriwo imwe yekupikisa, idiki kwazvo), overcurrent inotanga 0 ohm resistor fused, nekudaro kutyora dunhu, kudzivirira tsaona huru.Dzimwe nguva zvidziviriro zvidiki zvinopikisa zero kana mashoma ohms zvinoshandiswawo semafuse.Nekudaro, izvi hazvikurudzirwe, asi vamwe vanogadzira vanoshandisa izvi kuchengetedza mari.Uku hakusi kushandiswa kwakachengeteka uye hakuwanzo shandiswa nenzira iyi.

d.Nzvimbo yakachengeterwa kutumwa.Iwe unogona kusarudza kuti woiisa here kana kuti kwete, kana zvimwe zvakakosha, sezvinodiwa.Dzimwe nguva inomakwawo ne* kuratidza kuti zvasvika pakugadziriswa.

e.Inoshandiswa sedunhu rekugadzirisa.Izvi zvinoita zvakafanana kune jumper kana dipswitch, asi inogadziriswa nekutengesa, nekudaro kudzivirira kusarudzika kwekugadzirisa nemushandisiwo zvake.Nekuisa resistors munzvimbo dzakasiyana, zvinokwanisika kushandura basa redunhu kana kuseta kero.Semuenzaniso, nhamba yevhezheni yemamwe mabhodhi inowanikwa nenzira dzepamusoro uye dzakaderera, uye isu tinogona kusarudza 0 ohms kuita shanduko yeakakwira uye yakaderera mazinga emhando dzakasiyana.

2. Simba re0 Ohm Resistors

Zvinyorwa zve 0 Ohm resistors zvinowanzoparadzaniswa nesimba, zvakadai se 1/8W, 1/4W, nezvimwewo. Tafura inonyora kuburikidza-ikozvino kukwanisa kunoenderana nemapakiti akasiyana e0-ohm resistors.

0 Ohm Resistor Yazvino Kugona nePackage

3. Single point earth yeanalogue nedigital ground

Chero bedzi dziri zvikonzero, dzinofanira kubatanidzwa pamwe chete uye ipapo pasi.Kana isina kubatanidzwa pamwe chete i "ivhu rinoyangarara", pane kudzvanywa mutsauko, nyore kuunganidza kuchaja, zvichikonzera static magetsi.Ground ireferensi 0 inogona, ma voltages ese anotorwa kubva kune referensi pasi, chiyero chepasi chinofanira kuenderana, saka marudzi ese epasi anofanirwa kuve mapfupi akabatana pamwechete.Zvinotendwa kuti pasi rinokwanisa kutora machaji ese, rinogara rakagadzikana uye ndiro rekupedzisira referensi nzvimbo.Kunyange zvazvo mamwe mapuranga asina kubatanidzwa pasi, simba remagetsi rinosungirirwa pasi uye simba rinobva pabhodhi rinozodzokera kune simba rekugadzira pasi.Kubatanidza analogue uye nzvimbo dzedhijitari zvakananga kune mumwe nemumwe pamusoro penzvimbo yakakura zvinotungamira mukupindirana.Kwete pfupi yekubatanidza uye isina kukodzera, chikonzero sepamusoro, tinogona kushandisa nzira ina dzinotevera kugadzirisa dambudziko iri.

a.Yakabatanidzwa nemagineti mabedhi: Iyo yakaenzana dunhu remagineti mabedhi yakaenzana nebhendi kuramba muganhu, iyo inongove yakakosha kudzvinyirira mhedzisiro paruzha pane imwe frequency point, uye inoda kufanofungidzira kweruzha frequency kana ichishandiswa kuitira sarudza muenzaniso wakakodzera.Kune zviitiko apo iyo frequency haina chokwadi kana isingatarisike, magineti mabedhi haakodzeri.

b.Yakabatanidzwa ne capacitor: capacitor yakaparadzaniswa kuburikidza ne AC, zvichiita kuti ivhu rinoyangarara, haigone kuwana mhedzisiro yekuenzana kugona.

c.Kubatana nemainductors: inductors yakakura, ine akawanda akarasika paramita uye haina kugadzikana.

d.0 ohm resistor yekubatanidza: impedance inogona kudzorwa huwandu, impedance yakaderera zvakakwana, hapazove neresonance frequency point uye mamwe matambudziko.

4. 0 Ohm resistor sei derating?

0 Ohm resistors anowanzo kucherechedzwa chete neyakayerwa yakanyanya ikozvino, uye yakanyanya kuramba.Iyo derating yekumisikidza kazhinji ndeye yakajairwa resistors, uye kashoma inotsanangura maitiro ekubvisa 0 ohm resistors zvakasiyana.Tinogona kushandisa Mutemo weOhm kuverenga iyo yakanyanya kupikisa yakapetwa neyakayerwa ikozvino ye0 Ohm resistor, semuenzaniso, kana iyo yakatemerwa ikozvino iri 1A uye yakanyanya kupikisa iri 50mΩ, saka isu tinofunga iyo yakanyanya voltage inobvumidzwa kuva 50mV.Nekudaro, zvakanyanya kuoma kuyedza iyo chaiyo voltage ye0 Ohm mumamiriro ekushandisa ekushandisa, nekuti voltage idiki kwazvo, uye nekuti inowanzoshandiswa kupfupika, uye musiyano wevoltage pakati pemigumo miviri yepfupi uri kuchinjika.

Saka, kazhinji isu tinorerutsa maitiro aya nekushandisa yakananga 50% derating yeyakayerwa ikozvino kuti ishandiswe.Semuenzaniso, isu tinoshandisa resistor kubatanidza ndege mbiri dzemagetsi, iyo magetsi ndeye 1A, tobva tafungidzira kuti ikozvino yezvose magetsi uye GND ndeye 1A, maererano nenzira yakapusa yekuzvidza yatichangobva kutsanangura, sarudza 2A. 0 ohm resistor yekupfupisa.