Nhanganyaya yeammeter

Overview

Ammeter chiridzwa chinoshandiswa kuyera ikozvino mu AC uye DC maseketi.Mumufananidzo wedunhu, chiratidzo cheammeter "denderedzwa A".Huwandu hwazvino huri mu "amps" kana "A" semayuniti akajairwa.

Iyo ammeter inogadzirwa maererano nekuita kwezvino-inotakura conductor musimba remagineti nesimba reiyo magnetic field.Kune magineti echigarire mukati meammeter, iyo inogadzira magineti pakati pematanda.Pane coil mune magnetic field.Kune chitubu chebvudzi pamagumo ecoil.Chitubu chega chega chakabatana kune terminal yeammeter.Shaft inotenderera yakabatana pakati pechitubu necoil.Pamberi pe ammeter, pane chinongedzo.Kana paine ikozvino inopfuura nepakati, ikozvino inopfuura nepakati pemagineti padivi pechitubu uye shaft inotenderera, uye ikozvino inocheka iyo magnetic field line, saka coil inotsauswa nesimba reiyo magnetic field, iyo inotyaira shaft inotenderera. uye chinongedzo chekutsauka.Sezvo hukuru hwesimba remagineti hunowedzera nekuwedzera kwezvino, hukuru hwemazuva ano hunogona kuonekwa kuburikidza nekutsauka kwechinongedzo.Iyi inonzi magnetoelectric ammeter, inova mhando yatinowanzo shandisa murabhoritari.Munguva yejunior chikoro chesekondari, huwandu hweammeter inoshandiswa kazhinji 0 ~ 0.6A uye 0 ~ 3A.

kushanda musimboti

Iyo ammeter inogadzirwa maererano nekuita kwezvino-inotakura conductor musimba remagineti nesimba reiyo magnetic field.Kune magineti echigarire mukati meammeter, iyo inogadzira magineti pakati pematanda.Pane coil mune magnetic field.Kune chitubu chebvudzi pamagumo ecoil.Chitubu chega chega chakabatana kune terminal yeammeter.Shaft inotenderera yakabatana pakati pechitubu necoil.Pamberi pe ammeter, pane chinongedzo.Kutsauka kwepointer.Sezvo hukuru hwesimba remagineti hunowedzera nekuwedzera kwezvino, hukuru hwemazuva ano hunogona kuonekwa kuburikidza nekutsauka kwechinongedzo.Iyi inonzi magnetoelectric ammeter, inova mhando yatinowanzo shandisa murabhoritari.

Kazhinji, mafungu ekurongeka kwema microamp kana milliamps anogona kuyerwa zvakananga.Kuti uyere mafungu akakura, ammeter inofanirwa kunge iine parallel resistor (inozivikanwawo seshunt).Iyo yekuyera mashandiro eiyo magnetoelectric mita inonyanya kushandiswa.Kana kukosha kwekupikisa kweshunt ndiko kuita kuti yakazara-chiyero ikozvino ipfuure, iyo ammeter yakasvibiswa zvakakwana, kureva, chiratidzo cheammeter inosvika pakakwirira.Nezvezvino zveashoma amps, yakakosha shunts inogona kuiswa mune ammeter.Kune mafungu ari pamusoro akati wandei amps, yekunze shunt inoshandiswa.Iko kupikisa kukosha kwepamusoro-ikozvino shunt iduku zvikuru.Kuti udzivise zvikanganiso zvakakonzerwa nekuwedzera kwekupikisa kwekutungamira uye kusangana nekupokana kune shunt, iyo shunt inofanira kuitwa mune mana-terminal fomu, ndiko kuti, kune maviri ezvino zviteshi uye maviri voltage terminals.Semuenzaniso, kana yekunze shunt uye millivoltmeter inoshandiswa kuyera yakakura ikozvino ye200A, kana iyo yakajairwa huwandu hweiyo millivoltmeter inoshandiswa iri 45mV (kana 75mV), ipapo kukosha kwekupokana kweshunt ndiko 0.045/200=0.000225Ω (kana 0.075/200=0.000375Ω).Kana mhete (kana nhanho) shunt ikashandiswa, multi-range ammeter inogona kuitwa.

Application

Ammeters anoshandiswa kuyera kukosha kwazvino mu AC uye DC maseketi.

1. Inotenderera coil type ammeter: yakashongedzerwa neshunt kuderedza kunzwisiswa, inogona kushandiswa chete kuDC, asi rectifier inogonawo kushandiswa kune AC.

2. Inotenderera iron sheet ammeter: Kana iyo yakayerwa ikozvino inoyerera kuburikidza neyakagadzika coil, magineti inogadzirwa, uye simbi yakapfava inotenderera mune inogadzirwa magineti, inogona kushandiswa kuyedza AC kana DC, iyo inogara yakasimba, asi haina kunaka sekutenderera coil ammeters Inonzwa.

3. Thermocouple ammeter: Inogonawo kushandiswa kune AC kana DC, uye pane resistor mairi.Kana iyo yazvino ichiyerera, kupisa kweanopikisa kunokwira, iyo resistor inosangana neiyo thermocouple, uye iyo thermocouple yakabatana nemamita, nokudaro ichigadzira thermocouple mhando Ammeter, iyi isina kunanga mita inonyanya kushandiswa kuyera yakakwirira frequency alternating ikozvino.

4. Hot wire ammeter: Paunenge uchishandiswa, sunga kumativi ose ewaya, waya inopisa, uye kuwedzera kwayo kunoita kuti pointer itenderere pachikero.

Classification

Zvinoenderana nehunhu hwekuyerwa ikozvino: DC ammeter, AC ammeter, AC uye DC mbiri-chinangwa mita;

Zvinoenderana nemusimboti wekushanda: magnetoelectric ammeter, electromagnetic ammeter, magetsi ammeter;

Zvinoenderana nechiyero chekuyera: milliampere, microampere, ammeter.

Sarudzo gwara

Iyo yekuyera nzira yeammeter uye voltmeter yakangofanana, asi iyo yekubatanidza muyeresheni yedunhu yakasiyana.Nokudaro, pfungwa dzinotevera dzinofanira kuonekwa pakusarudza uye kushandisa ammeters uye voltmeters.

⒈ Kusarudza mhando.Kana iyo yakayerwa iri DC, iyo DC mita inofanirwa kusarudzwa, kureva, mita yemagnetoelectric system yekuyera meshini.Kana iyo yakayerwa AC, inofanirwa kutarisisa kune yayo waveform uye frequency.Kana iri sine wave, inogona kushandurudzwa kune mamwe maitiro (senge kukosha kwepamusoro, kukosha kwepakati, nezvimwewo) chete nekuyera kukosha kunoshanda, uye chero mhando yemamita AC inogona kushandiswa;kana iri isiri-sine wave, inofanirwa kusiyanisa izvo zvinoda kuyerwa Kune iyo rms kukosha, chiridzwa chemagnetic system kana ferromagnetic electric system inogona kusarudzwa, uye avhareji kukosha kwechiridzwa cheiyo rectifier system inogona kusarudzwa. vakasarudzwa.Icho chiridzwa chemagetsi emagetsi ekuyera machira chinowanzo shandiswa kuyera chaiyo yealternating ikozvino uye voltage.

⒉ Sarudzo yechokwadi.Iyo yakakwirira yekururama kwechiridzwa, iyo inodhura mutengo uye yakanyanya kuoma kuchengetedza.Uyezve, kana mamwe mamiriro asina kufananidzwa nemazvo, chiridzwa chine chiyero chepamusoro chinogona kusakwanisa kuwana mibairo yekuyera chaiyo.Nokudaro, munyaya yekusarudza chimbo chepasi-chakanaka kuti chizadzise zviyero zvekuyera, usasarudza chimbo chepamusoro-chepamusoro.Kazhinji 0.1 uye 0.2 mamita anoshandiswa semamita akaenzana;0.5 uye 1.0 mamita anoshandiswa pakuyera marabhoritari;zviridzwa zviri pasi pe1.5 zvinowanzo shandiswa kuyera engineering.

⒊ Range kusarudzwa.Kuti upe kutamba kwakazara kune basa rekururama kwechiridzwa, zvinodikanwawo kusarudza zvine musoro muganhu wechiridzwa maererano nehukuru hwehuwandu hwakayerwa.Kana kusarudzwa kusina kunaka, chikanganiso chekuyera chichava chikuru kwazvo.Kazhinji, chiratidzo chechiridzwa chinoyerwa chakakura kupfuura 1/2 ~ 2/3 yehupamhi hwechiridzwa, asi haigone kudarika huwandu hwayo.

⒋ Sarudzo yekupikiswa kwemukati.Paunosarudza mita, kupikisa kwemukati kwemamita kunofanirawo kusarudzwa maererano nehukuru hwekuyera impedance, zvikasadaro zvinounza kukanganisa kukuru kwechiyero.Nemhaka yokuti ukuru hwekupikisa kwemukati hunoratidza kushandiswa kwesimba kwemamita pachayo, pakuyera ikozvino, ammeter ine zviduku zvishoma zvemukati zvinofanira kushandiswa;pakuyera voltage, voltmeter ine yakakura mukati mekudzivirira inofanira kushandiswa.

Maintenance

1. Nyatsotevedzera zvinodikanwa zvebhuku rekushandisa, uye chengetedza uye urishandise mukati meiyo inotenderwa huwandu hwetembiricha, hunyoro, huruva, kuzunguza, magetsi emagetsi uye mamwe mamiriro.

2. Chimbo chakachengetwa kwenguva yakareba chinofanira kuongororwa nguva dzose uye unyoro hunofanira kubviswa.

3. Zvishandiso zvakashandiswa kwenguva yakareba zvinofanirwa kuongororwa nekugadziriswa zvinoenderana nezvinodiwa zvekuyera magetsi.

4. Usabvisa uye usabvisa chiridzwa paunoda, kana zvisina kudaro kunzwisiswa kwayo uye kururamisa kuchakanganiswa.

5. Pazviridzwa zvine mabhatiri akaiswa mumamita, teerera kuti utarise kubuda kwebhatiri, uye uvatsive nenguva kuti udzivise kuputika kwebheteri electrolyte uye kuora kwezvikamu.Kune mita isingashandiswi kwenguva yakareba, bhatiri mumamita rinofanira kubviswa.

Nyaya dzinoda kutarisirwa

1. Tarisa zviri mukati ammeter isati yaiswa mukushanda

a.Ita shuwa kuti chiratidzo chemazuva ano chakanyatsobatanidzwa uye hapana chakavhurika chedunhu chiitiko;

b.Iva nechokwadi chekuti kutevedzana kwechikamu chechiratidzo chemazuva ano kwakarurama;

c.Iva nechokwadi chokuti magetsi anosangana nezvinodiwa uye akabatanidzwa zvakanaka;

d.Ita shuwa kuti mutsara wekutaurirana wakabatana nemazvo;

2. Chengetedzo yekushandisa ammeter

a.Kunyatsotevera maitiro ekushanda uye zvinodiwa zvebhuku rino, uye rambidza chero kushanda pamutsara wechiratidzo.

b.Paunenge uchiseta (kana kushandura) iyo ammeter, ita shuwa kuti iyo yakatarwa data ndeyechokwadi, kuitira kuti udzivise kushanda kusina kujairika kweammeter kana data risiri rekuyedza.

c.Paunenge uchiverenga data yeammeter, inofanirwa kuitwa zvakanyatsoenderana nemaitiro ekushanda uye bhuku rino kudzivirira zvikanganiso.

3. Ammeter kubvisa kutevedzana

a.Bvisa simba re ammeter;

b.Pfupi-dunhu mutsara wechiratidzo chemazuva ano kutanga, wozoibvisa;

c.Bvisa tambo yemagetsi uye mutsara wekutaurirana weammeter;

d.Bvisa midziyo uye uichengete zvakanaka.

Troubleshooting

1. Chiitiko chemhosva

Phenomenon a: Kubatana kwedunhu kwakarurama, vhara kiyi yemagetsi, fambisa chidimbu chinotsvedza che rheostat inotsvedza kubva pahupamhi hwekupokana kukosha kune kushoma kushoma kukosha, iyo ikozvino inoratidza nhamba haichinji kuenderera, zero chete (tsono haifambi. ) kana kufambisa zvishoma chidimbu chinotsvedza kuratidza Yakazara offset kukosha (tsono inotsaukira mumusoro nekukurumidza).

Phenomenon b: Iyo yedunhu yekubatanidza ndeyechokwadi, vhara kiyi yemagetsi, iyo ammeter pointer inotenderera zvakanyanya pakati zero uye yakazara offset kukosha.

2. Ongororo

Iyo yakazara bias ikozvino yemusoro weammeter ndeyeiyo microampere level, uye huwandu hunowedzerwa nekubatanidza shunt resistor mukufanana.Iyo yakaderera ikozvino mune yakajairika yekuyedza dunhu ndeye milliampere, saka kana pasina yakadaro shunt kuramba, meter pointer inorova yakazara bias.

Migumo miviri ye shunt resistor inosungirirwa pamwe chete nema solder lugs uye maviri macheto emusoro wemamita nepamusoro neakadzika ma nuts ekusungirira paterminal uye positi yekumisa.Miti yekusimbisa iri nyore kusunungura, zvichiita kuti kuparadzaniswa kwe shunt resistor uye musoro wemamita (Pane kukundikana kwechiitiko a) kana kushamwaridzana kusina kunaka (kukundikana kwechiitiko b).

Chikonzero chekuchinja kamwe kamwe muhuwandu hwemusoro wemamita ndechekuti kana dunhu rakavhurwa, chidimbu chinotsvedza chevaristor chinoiswa panzvimbo ine kukosha kukuru kwekupokana, uye chidimbu chinotsvedza chinowanzo endeswa kune insulating porcelain. chubhu, zvichiita kuti dunhu riputswe, saka nhamba yechiratidzo iripo ndeye: zero.Zvadaro fambisa chidimbu chinotsvedza zvishoma, uye chinosvika pakusangana newaya yekupikisa, uye dunhu rinonyatsobatidzwa, zvichiita kuti nhamba yezvino inoratidza kuti ishanduke kamwe kamwe kune yakazara.

Nzira yekubvisa ndeyekuomesa nati yekusimbisa kana kuparadzanisa chivharo chekumashure chemita, weld migumo miviri ye shunt resistor pamwe chete nemigumo miviri yemusoro wemamita, uye weld iwo kune maviri welding lugs.