Kuti unzwisise nuances yekupokana kwemukati uye impedance, zvakakosha kuti uzive kuti impedance ine chekuita neAC (alternating current), ukuwo kuramba kwemukati kuchinyanya kudyidzana neDC (yakananga ikozvino). Pasinei nemamiriro avo akasiyana, kuverenga kwavo kunotevera fomula imwechete, R = V / I, uko R iri mukati mekudzivirira kana impedance, V ndeye voltage, uye ini ndiri ikozvino.
Kupikiswa kwemukati: Chipinganidzo kune Electron Flow
Kupikiswa kwemukati kunobva pakudhumhana kwemaerekitironi nelatisi yecondukita, kushandura simba remagetsi kuita kupisa. Funga kupikisa kwemukati semhando yekukweshana kunotadzisa kufamba kweelectron. Mumamiriro ezvinhu apo kuchinjana ikozvino kunoyerera kuburikidza nechinhu chinopikisa, inogadzira kudonha kwemagetsi. Kudonha uku kunoramba kuri muchikamu nezvino, kuratidza hukama hwakananga pakati pekuyerera kwezvino uye kushorwa kwemukati kwakasangana.
Impedance: Pfungwa Yakakura Inosanganisira Kupokana Kwemukati
Impedance inomiririra izwi rakazara rinobatanidza marudzi ese ekupikisa kuyerera kweelectron. Izvi zvinosanganisira kwete kungopikisa kwemukati, asiwo kugadzirisa. Iyo ipfungwa inowanikwa kwese kwese kunowanikwa kune ese maseketi uye zvikamu.
Zvakakosha kusiyanisa reactance uye impedance. Reactance inoreva chaizvo kushorwa kunopihwa kuAC ikozvino nemainductors uye capacitors, zvinhu zvinosiyana mumhando dzakasiyana dzebhatiri. Kusiyana uku kunoonekwa mumadhayagiramu akasiyana uye maitiro emagetsi emhando yebhatiri imwe neimwe.
Kuti tidzikise impedance, tinogona kutendeukira kuRandles modhi. Uyu muenzaniso, unoratidzwa muMufananidzo 1, unobatanidza R1, R2, pamwe chete neC. Kunyanya, R1 inomiririra kupikisa kwemukati, asi R2 inofananidzwa nekutengesa kutengesa kutengesa. Uyezve, C inoreva kaviri-layer capacitor. Zvikurukuru, iyo Randles modhi inowanzo bvisa inductive reactance, semhedzisiro yayo pakuita kwebhatiri, kunyanya pazasi ma frequency, ishoma.
Mufananidzo 1: Randles modhi yelead acid bhatiri
Kuenzanisa Kwemukati Resistance uye Impedance
Kuti ujekese, kuenzanisa kwakadzama kwekupikiswa kwemukati uye impedance inotsanangurwa pazasi.
Chikamu cheMagetsi Property |
Kuramba Kwemukati (R) |
Impedance (Z) |
Circuit Application |
Inoshandiswa zvakanyanya mumaseketi anoshanda pane yakananga ikozvino (DC). |
Inonyanya kushandiswa mumaseketi akagadzirirwa alternating current (AC). |
Circuit Presence |
Inoonekwa mune ese ari maviri alternating ikozvino (AC) uye yakananga ikozvino (DC) maseketi. |
Yakasarudzika kune alternating ikozvino (AC) maseketi, asipo muDC. |
Origin |
Inobva kuzvinhu zvinotadzisa kufamba kwemagetsi. |
Inosimuka kubva mukusanganiswa kwezvinhu zvinopikisa uye zvinopindirana nemagetsi emagetsi. |
Numerical Expression |
Inoratidzwa uchishandisa nhamba dzechokwadi chaidzo, semuenzaniso, 5.3 ohms. |
Inoratidzwa kuburikidza nenhamba chaidzo uye zvikamu zvekufungidzira, zvinoratidzwa ne'R + ik'. |
Frequency Dependence |
Kukosha kwayo kunoramba kuripo zvisinei nekuwanda kweiyo DC ikozvino. |
Kukosha kwayo kunochinja nekuchinja kweiyo AC ikozvino. |
Phase Characteristic |
Hairatidze chero chikamu chekona kana hukuru hunhu. |
Inoratidzwa nezvose zviri zviviri definitive phase angle uye ukuru. |
Maitiro muElectromagnetic Field |
Inongotaridza kupera kwesimba kana yakafumurwa kumunda wemagetsi. |
Inoratidza kuparara kwesimba uye kugona kuchengetedza simba mundima yemagetsi. |
Precision muBattery Internal Resistance Measurement
Semupi wemhinduro anoshanda mukutarisa nekugadzirisa mabhatiri ekuchengetedza, Kusimbisa kweDFUN pane bhatiri yemukati yekupikiswa kuyerwa kunopindirana neyakasimbiswa indasitiri maitiro, kukwevera kurudziro kubva kune inogamuchirwa zvakanyanya zvishandiso seFluke kana Hioki. Nzira dzekushandisa dzakafanana nemidziyo iyi, inozivikanwa nekurongeka kwayo uye kugamuchirwa kwevatengi kwakapararira, isu tinoomerera kune zviyero zvakaita seIEE1491-2012 uye IEE1188.
IEE1491-2012 inotitungamirira mukunzwisisa kupikisa kwemukati separameter ine simba, ichida kuenderera mberi kwekutevera kuyera kutsauka kubva kune yekutanga. Zvichakadaro, iyo IEE1188 yakajairwa inoisa chikumbaridzo chekuita, ichipa zano kuti kana kupikiswa kwemukati kuchipfuura 20% yeyakajairwa mutsara, bhatiri rinofanirwa kutariswa kuti ritsive kana kuisirwa kutenderera kwakadzika uye recharge.
Tichibva pamisimboti iyi, nzira yedu yekuyera kuramba kwemukati inosanganisira kuisa bhatiri kune yakagadziriswa frequency uye ikozvino, inoteverwa nevoltage sampling. Iko kunotevera kugadzirisa, kusanganisira kugadzirisa uye kusefa kuburikidza neanoshanda amplifier wedunhu, inopa kuyerwa kwakaringana kwekupikiswa kwemukati. Zvinoshamisa, nzira iyi inopera mukati me100 milliseconds, ichizvikudza inoyemurika yekurongeka kwe1% kusvika 2%.
Mukupedzisa, iko kurongeka mukati meyero yekupikisa inovimbisa kutarisisa kunoshanda kwemabhatiri, zvichibatsira pakurarama kwavo kwenguva refu. Iri gwara rine chinangwa chekubatsira avo vanogona kuona zvichinetsa kusiyanisa pakati pekupokana kwemukati uye impedance, kufambisa kunzwisisa kwakadzama kwezvinhu izvi zvemagetsi. Kuti uwane rumwe ruzivo rwakadzama uye nzwisiso, unogona kutsvaga mamwe zviwanikwa kubva DFUN Tech.
