Dc contactor feem ntau yog siv rau kev deb ntev ntawm kev lag luam thiab tawm dc Circuit Court thiab nquag pib, nres, rov qab thiab rov qab nres nres dc lub cav, tseem siv rau nquag txuas thiab disconnecting lifting electromagnets, solenoid valve, clutch electromagnetic chev, thiab lwm yam. Muaj ob hom kev teeb tsa nrog rau qhov dav hauv qhov dav thiab qhov dav hlau ntawm tus DC contactor, Qee cov khoom tau muab los ntawm AC contactors. Yog li, tus qauv thiab ua hauj lwm ntawm dc contactor yog tib yam li tus AC contactor, Nws yog tsuas yog li ntawm electromagnetic mechanism, hu rau lub kaw lus thiab arc extinguishing ntaus ntawv.
(1) electromagnetic mechanism
Lub tshuab electromagnetic ntawm dc contactor yog tsim ntawm cov tub ntxhais hlau, coil thiab kos duab. Cov kauj voj txuas nrog los ntawm cov tib neeg tam sim no, Hauv qhov kev lag luam, Tsis muaj kev kho tam sim no hauv cov tub ntxhais hlau, Iron core tsis sov, tsis muaj hlau poob, yog li ntawd, cov tub ntxhais muaj peev xwm ua los ntawm cov txhuas hlau nrum lossis cam hlau. Tus dc contactor muaj ntau lem ntawm kauj, Yuav kom cov coil kub zoo, lub kauj feem ntau yog mob rau hauv ntev, nyias hom cylindrical. Vim hais tias magnetic flux nyob rau hauv cov tub ntxhais hlau yog qhov ruaj khov, luv ntiv nplhaib ntawm lub nplhaib tsis tas yuav tsum siv rau ntawm tus ncej ntawm cov hlau. Yuav kom paub tseeb tias cov ntaub ntim tso tawm tsis muaj teeb meem, Nws yog feem ntau tsim nyog muab cov tshuab tsis muaj hlau nplaum sib txuas ntawm cov tub ntxhais thiab cov khoom siv kom txo tau qhov kev tshuam ntawm kev rov los. Saum 250A, dc contactors feem ntau siv tandem ob chav winding coils.
Yog li ntawd, cov tub ntxhais yuav ua los ntawm tag nrho cov cam khwb cia hlau los yog cam khwb cia hlau.
DC contactor
1 ----- pib coil
2 - tuav coil
Kauj l yog lub kauj pib thiab coil 2 yog lub chaw tuav, ib txwm kaw kaw ntawm tus contactor yog nyob rau hauv cov lus qhia nrog cov tuav coil. Thaum lub sij hawm qhov Circuit Court txuas nrog, coil 2 yog luv luv-circuited los ntawm kev sib txuas kaw zuj zus, cov kauj l kuj tau txais qhov loj thiab tam sim no. Thaum tus contactor ua hauj lwm, tus neeg tiv toj kaw lawm yog kaw, thiab coil 1 thiab coil 2 yog lub zog nyob hauv kev sib txuas ua ke. Tus voltage yog qhov tsis tas li, yog li tam sim no me me, tab sis lub armature tseem yuav tuav ua ke, Nws yuav txuag hluav taws xob thiab ntev lub neej kev pab ntawm electromagnetic chev.
(2) Tiv tauj peb
Dc contactor muaj kev sib cuag tseem ceeb thiab kev pab tiv thaiv. Kev tiv tauj lub ntsiab yog feem ntau ntawm unipolar lossis bipolar, Vim muaj kev sib txuas los yog tshem tawm lub sijhawm tam sim no, yog li ntawd, txais kev sib txuas ntawm cov ntiv tes sib txuas.
( 2 ) cov cuab yeej tua kab
Vim tias DC arc extinguishing tam sim no tsis muaj qhov nruab nrab xoom-crossing taw tes , thaum lub ntsiab hu rau tus DC contactor lovs tus loj tam sim no ( tam sim no Circuit Court ) , arc extinguishing nyuaj dua, muaj zog arcs feem ntau ua, yooj yim mus hlawv cov neeg thiab ncua fais fab tuag txiav. Txhawm rau tua lub nrawm nrawm, tus dc contactor feem ntau siv lub tshuab nqus hlau nplaum, thiab nruab nrog muab faib thiab txha roj hmab tua hluav taws.