Yuav ua li cas ntsuas qhov zoo ntawm peb-theem motors nrog ib tug multimeter
Ua ntej, siv ib lub multimeter los ntsuas qhov DC tsis kam ntawm txhua qhov winding ntawm lub cev muaj zog. Rau peb-theem motors, xyuas kom meej tias qhov kev tiv thaiv qhov tseem ceeb ntawm peb-theem windings yog sib npaug li qhov ua tau. Feem ntau, qhov kev tiv thaiv tus nqi yuam kev ntawm peb-theem windings ntawm lub cev muaj zog nrog lub zog me me (hauv qab 2.2KW) tsis tuaj yeem tshaj 5Ω. Kev sib piv fais fab Kev tsis sib haum xeeb ntawm peb-theem windings ntawm cov motors loj tsis tuaj yeem tshaj 2 ohms. Peb-theem motors muaj qhov sib txawv winding resistances nrog ntau lub zog sib txawv (feem ntau yog li ntawm 1 mus rau ob peb puas Ω. Lub zog loj dua, qhov me me ntawm DC tsis kam ntawm cov windings. ).
Qhov kev tiv thaiv ntawm ib theem lub cev muaj zog feem ntau yog nruab nrab ntawm ob peb Ω thiab ob peb kΩ, thiab nws tsuas muaj lub ntsiab winding thiab ib qho kev pabcuam winding. Lub ntsiab thiab pab windings ntawm ib-theem lub cev muaj zog uas tuaj yeem tig mus rau pem hauv ntej thiab rov qab muaj qhov sib npaug DC tsis kam, thiab cov koom haum tsuas tuaj yeem khiav hauv ib qho kev taw qhia. Tus nqi tsis kam ntawm lub winding yog me ntsis loj dua tus nqi kuj ntawm lub ntsiab winding. Rau ib-theem lub cev muaj zog siv lub nplhaib luv luv, tsuas yog lub ntsiab winding tau txuas nrog 220v AC fais fab mov.
Siv ib lub multimeter los ntsuas qhov rwb thaiv tsev ntawm lub winding tsis yog qhov tseeb txaus, tab sis qee qhov kev tiv thaiv hluav taws xob tsis zoo kuj tseem tuaj yeem ntsuas ntsuas nrog lub multimeter. Siv 200M ntau yam ntawm digital multimeter (RX10K ntau ntawm tus pointer multimeter) los ntsuas ib theem winding thiab lwm yam ob theem windings. Los yog cov rwb thaiv tsev tiv thaiv ntawm winding thiab chassis, tus nqi DC kuj yog infinite los yog siab tshaj ob peb puas megohms.
Yog hais tias tus nqi ntawm DC kuj tsis tshua muaj, nws ua pov thawj tias cov rwb thaiv tsev winding yog me me, nws yuav ntub thiab yuav tsum tau qhuav ua ntej ua haujlwm. Yog tias tus nqi tso tawm tsis kam yog kaum lossis 0, nws ua pov thawj tias muaj qhov luv luv ntawm windings thiab windings, thiab nruab nrab ntawm windings thiab chassis. Nws yuav tsum raug tshuaj xyuas thiab qhov txhaum yuav raug tshem tawm ua ntej nws tuaj yeem muab tso rau hauv kev ua haujlwm.
1. Kev soj ntsuam xyuas kom pom tias lub cev muaj zog muaj qhov pom tseeb hlawv tsis hnov tsw thiab seb cov terminals ntawm lub thawv sib txuas puas zoo.
2. Tig lub rotor lub cev muaj zog los ntawm tes kom pom tias qhov kev sib hloov yog qhov qub thiab yog tias muaj suab nrov txawv txav.
3. Siv multimeter los ntsuas qhov ntsuas.
Peb paub tias cov motors muaj delta kev twb kev txuas thiab lub hnub qub kev twb kev txuas, tab sis txawm siv txoj kev sib txuas, txoj kev ntsuas yog tib yam:
Ib qho yog ntsuas qhov rwb thaiv tsev rau hauv av ntawm txhua qhov ntawm peb theem.
(Tau kawg, ib lub multimeter tsuas tuaj yeem ntsuas qhov kev tiv thaiv hauv av, vim tias rwb thaiv tsev yog txheeb ze rau qhov hluav taws xob. Txhawm rau ntsuas qhov rwb thaiv tsev, koj tseem yuav tsum tau siv lub megger lossis qhov ntsuas hluav taws xob tiv thaiv hluav taws xob. Rau kev yooj yim ntawm kev piav qhia, nws tseem hu ua rwb thaiv tsev).
Qhov thib ob yog ntsuas cov theem rwb thaiv tsev ntawm ob ntawm peb theem.
Qhov thib peb yog siv qhov kev tiv thaiv ntau yam ntawm cov multimeter los kuaj qhov DC tsis kam tus nqi ntawm peb-theem winding. (DC tsis kam yog feem ntau ntsuas kom raug ntau dua nrog DC resistance tester lossis Wheatstone choj, vim tias tus nqi DC kuj feem ntau ntsuas me me, feem ntau nyob ib ncig ntawm 0.2 ohms. tuaj yeem siv los hloov.)
Feem ntau hais lus, qhov ntsuas hluav taws xob tiv thaiv yuav tsum tsis txhob me dhau, feem ntau tsawg kawg yog 0.5 megohms. Qhov peb ntsuas qhov ntsuas hluav taws xob tiv thaiv rau hauv av yuav tsum sib npaug, thiab peb theem-rau-theem rwb thaiv tsev qhov tseem ceeb yuav tsum sib npaug. Peb qhov DC resistor qhov tseem ceeb yuav tsum sib npaug.
