Asynchronous Motor vs Synchronous Motor: Cov Yuam sib luag Tshaj Tshwv

Hluav taws xob siv ua kev lag luam tseem ceeb rau kev siv hluav taws xob, tuab ntau yam li kev tsim khoom thiab kev nruj siab. Nyob hauv qhov muaj ntau yam, asynchronous thiab synchronous motors yog ob hom tseem ceeb uas tus kws tshuaj xyuas yuav tsum paub thaum xaiv lub tswj hluav taws xob tseem ceeb. Kev xaiv ntawm ob hom no muaj feem cuam tshaj plaws rau kev siv hluav taws xob, nqi pheej zog, thiab txoj kev sib raug zoo nyob hauv ntau yam kev lag luam.

Kev paub txog qhov sib txawv ntawm asynchronous thiab synchronous motors pab rau cov neeg tsim kho thiab neeg tswj khw kev leej liam tswj lub tswv yim kom tau kev txwv txwm uas tuaj yeem tiv thaiv nyob rau hauv kev ua haujlwm thiab ntau dua nyob rau hauv kev lag luam. Cov chaw tsim motors no sib txawv nyob rau hauv kev ua haujlwm, kev nce siab, thiab kev siv hauv cheeb koom, yog li txhua hom muaj qhov zoo rau qee yam kev siv hauv cheeb koom.

Cov Ntsiab Lus Ua Haujlwm Thiab Cov Caij Nyoog Tseemceeb

Asynchronous Motor Operation

An motor qhia ua haujlwm los ntawm electromagnetic induction, uas lub magnetic field uas nce ncov los ntawm stator windings tsim currents nyob rau hauv rotor conductors. Cov currents no tsim ib lub magnetic field uas sib kis rau stator field, tsim qhov torque yuav tsum tau los nce. Qhov tseem ceeb tshaj plaws ntawm hom motor no yog tias lub rotor speed feem ntau yuav nyem saum ntawm lub synchronous speed ntawm lub rotating magnetic field.

Qhov kev sib txawv ntawm asynchronous motors yog qhov tshwm sim uas tsim nyog rau nws kev ua haujlwm, uas txhais tau tias yog qhov sib txawv ntawm lub zog synchronous thiab lub rotor speed. Qhov kev sib txawv no yog tseem ceeb rau kev tsim torque, vim tias yog tias tsis muaj kev sib txawv (zero slip) yuav tsum muaj kev sib txawv kom muaj electromagnetic induction. Cov ntsiab lus ntawm kev sib txawv feem ntau yog ntawm 2% thiab 5% thaum muaj zog txaus, nyob ntawm lub motor design thiab kev ua haujlwm.

Kev tsim kho lub rotor hauv asynchronous motors feem ntau muaj ob hom: squirrel cage lossis wound rotor. Lub squirrel cage rotor muaj cov hlau los yog copper bars uas raug xa mus rau hauv end rings, tsim tau ib qhov chaw tsim nyog thiab zoo. Lub wound rotor muaj three-phase windings uas raug sib sau nrog rau slip rings, tso kom muaj kev ntxiv resistance nrog rau kev daws qhov chaw thiab kev pab hloov pauv kev starting.

Synchronous Motor Operation

Synchronous motors txhim kho kev rov qab los ntawm sau tseg kev sib xooj zoo tag lug ntawm lub rotor magnetic field thiab lub stator rotating field. Lub rotor muaj permanent magnets lossis DC-excited electromagnets uas pib nyob rau hauv lub stator field, thim kom lub rotor rov ib txwm nyob rau hauv synchronous speed uas raug xam los ntawm supply frequency thiab pole count. Kev synchronization no tshem tsis tau kev slip txhua yam nyob rau hauv qhov kev siv hauv qab no.

Kev pib synchronous motors yuav tsum muaj kev xav txog tshwj tsis vim tias lawv tsis tuaj yeem tsim kev pib torque thaum muab ntxiv rau AC supply. Ntau qhov kev siv yog siv pony motors, frequency converters, lossis damper windings los pib lub rotor mus rau hauv synchronous speed ua ntej synchronization pom meej. Thaum lub sijhawm synchronization xwb, lub motor tsoj ceeb ib txwm zoo li cas los xwb nyob rau hauv qhov kev siv hauv qab nws.

Qhov kev cuam tshuam hauv cov motors sycnhronous muab kev kho kom meej meej rau qhov chaw siv hluav taws xob thiab kev siv hluav taws xob tsis nyob rau hauv. Los txhim kho qhov DC excitation current, cov neeg tsoj kom tuaj yeem tsim kom motor tuaj yeem tso hluav taws xob nrog leading, lagging lossis unity power factor, muab kev pab siv hluav taws xob rau cov systems tso hluav taws xob rau hauv kev lag luam.

Tus ntev thiab qhov kev ua haujlwm

Kev saib xyuas thiab kho tshwj tsis

Qhov ntev ntawm asynchronous motor hloov tsawg nrog load nyob rau hauv qhov siv hauv kev hloov qhov ntev. Nyob rau hauv cov load khawv, motor tuaj yeem tso hluav taws xob nrog qhov ntev sycnhronous nrog qhov hloov tsawg, thaum cov load loj dua yuav cuam tshuam rau qhov hloov thiab yuav kom qhov ntev tso hluav taws xob kom tsawg dua. Qhov hloov hauv kev tso hluav taws xob no feem ntau yuav muaj qhov ntev ntawm 2% mus rau 5%, muab qhov kev pab tiv thaiv tsawg rau kev siv hluav taws xob ntau, tab sis yuav txwv kom tsis pub siv rau qhov kev tso hluav taws xob meej meej.

Kev siv cov cuab yeej tshaj tawg hlo sib txawv tuaj yeem txhim kho kev sau lub cev ntim tawm hlo tshaj thiab voltage. Qhov chaw tshaj tawg no pib tau rau lub asynchronous motor kom zoo li ib qhov chaw tuaj yeem sau ntau thiab tsim nyog rau kev siv tshaj tawg hlo sib txawv, kev pib me me, thiab kev ruaj khov energy ntawm qhov chaw sib txawv.

Kev tuaj yeem sau hlo tshaj tawg tau rau lub asynchronous motor ua rau nws muaj zog dua rau kev siv tshaj tawg hlo sib txawv, xws li rau cov pump, cov fan, thiab cov conveyor, uas kev siv hlo tshaj tawg sib txawv tuaj yeem ruaj khov energy ntau. Kev tuaj yeem sau lub motor hlo tshaj raws li kev xav tau, tsis yog tshaj hlo tshaj tawg tas li thiab tsis sau, feem ntau yuav ruaj khov energy ntau dua 30% lossis ntau dua.

Kev tsim zog thiab kev ruaj khov

Kev txiav txim siab ntawm kev sib txawv tshaj plaws hauv qhov chaw sib txawv, thiab cov chaw sib txawv muab cov nuj nqis zoo tshaj plaws thiab tuaj yeem ntxiv ntau dua. Qhov kev sib txawv ntawm kev sib txawv tsim ib qhov kev txwv kev sib txawv nyob hauv qhov sib txawv, yog li ntawd yuav tsis tas kam rau cov chaw sib txawv ntxiv hauv ntau qhov chaw sib txawv. Nuj nqis tshaj plaws feem ntau nyob ntawm 15% mus rau 25% kev sib txawv, muab cov nuj nqis ntau dua.

Cov chaw sib txawv muab cov nuj nqis zoo tshaj plaws nyob rau hauv qhov kev sib txawv, tab sis yuav tsum xav tau kev xav tau zoo rau kev txwv nuj nqis. Yog tias dhau qhov nuj nqis tshaj plaws, qhov chaw sib txawv yuav tsum rov qab los pib dua. Tab sis, hauv qhov kev sib txawv, cov chaw sib txawv feem ntau muab cov kev sib txawv zoo dua li cov chaw sib txawv sib txawv, tshaj tawm hauv qhov loj dua.

Kev txheeb xyuas kev siv khoom yooj yim tshaj plaws tuaj yeem txhawb nqa synchronous motors hauv kev siv hauv sijhawm ntev thaum kev siv khoom yooj yim tshaj plaws tuaj yeem kom muaj kev pab hauv kev siv ntau dua thiab ntau nqi. Premium efficiency asynchronous motors tau khaws qhov sib txawv no tas li, tab sis synchronous motors tsis tau nyob ib qho tshaj tawm hauv kev siv uas tshaj 500 horsepower uas kev siv khoom yooj yim tshaj plaws tuaj yeem tshwm sim kev txo nqi siv hauv kev ua haujlwm.

Power Factor thiab Electrical Characteristics

Power Factor Performance

Asynchronous motor power factor sib txawv nrog load, feem ntau nyob ntawm 0.3 mus rau 0.4 nyob rau load khawv mus rau 0.85 mus rau 0.9 nyob rau load tshaj tawm. Qhov lagging power factor no yuav tsum tau reactive power los ntawm electrical system, uas tuaj yeem tshwm sim nqi ntau dua thiab yuav tsum tau cov cuab yeej kho qhov power factor. Qhov magnetizing current uas yuav tsum tau rau kev tshwm sim khaub ncaws tsis muaj kev hlo li ntau los yog tsawg ntawm mechanical load.

Kev txhim kho cov cuab yeej tshaj tawm muaj nyob rau hauv chaw muaj ntau tus motor tsis sib xws, vim tias cov kev xav tau hauv qab noj tshaj tawm tau rau cov cuab yeej siv tshaj tawm, uas tuaj yeem tsim rau kev muab tshaj tawm. Cov khoom siv capacitor, synchronous condensers, lossis cov kev txhim kho kev siv tshaj tawm tuaj yeem pab daws teeb meem no, tab sis tseem muab ntau qhov nyuaj sib txawv thiab ntau nqi rau cov cuab yeej hluav taws xob.

Cov kev txwv uas nyob rau hauv qhov kev siv tshaj tawm kuj tseem txiav txim siab rau qhov choj chaw siv hluav taws xob. Cov transformers, switchgear, thiab conductors yuav tsum tswj cov hluav taws xob sib txawv nrog rau cov hluav taws xob tshaj tawm, uas tshwm sim rau ntau nqi rau cov cuab yeej hluav taws xob kom compared rau cov chaw siv tshaj tawm uas muaj kev sib cuag ib txwm.

Cov kev txhim kho tshaj tawm ntawm Synchronous Motor

Roj teeb sib txuas muaj feem sib cuag uas tuaj yeem kho kom raug rau kev siv hluav taws xob, txhawj xeeb tias thaum siv hluav taws xob nrog feem sib cuag ib (unity power factor) lossis feem sib cuag uas tso hluav taws xob rov qab (leading power factor) rau kev tso hluav taws xob rov qab. Qhov tseem ceeb no muaj txiaj ntsig loj rau hauv chaw tsim khoom, los pab txhim kho feem sib cuag hluav taws xob ntawm chaw tsim khoom, txo nqi siv hluav taws xob, thiab tshem tawm qhov xoom nyuj siv hluav taws xob ntxiv.

Kev siv hluav taws xob ntau dua (over-excitation) tso cai rau roj teeb sib txuas kom ua hauj lwm zoo li roj teeb sib cuag (synchronous condensers), tso hluav taws xob rov qab rau qhov chaw siv hluav taws xob. Qhov nyob ib leeg no muaj ob qhov kev ua hauj lwm: tso cai rau kev nqeg hluav taws xob thiab pab kom hluav taws xob zoo dua, txhim kho ob qhov: kev ua hauj lwm ntawm roj teeb thiab kev siv hluav taws xob meej pem ntawm chaw tsim khoom hauv ib qhov chaw.

Kev cuam tshwm los ntawm kev sib raug zoo ntawm kev ua haujlwm ntawm synchronous motor reactive power, tshwj tsis yog nyob rau hauv qhov chaw tsis muaj zog lossis nyob deb ntawm kev siv khwv. Tus motor tuaj yeem pab tso zog rau hauv qhov chaw tsis zoo, txhim khu kev nyob siab thiab kev nyob meej ntawm qhov chaw siv khwv.

Kev caij nres thiab kev saib xyuas

Kev nyiaj sib luag thiab lus nug

Kev caij nres tus asynchronous motor feem ntau yuav tsum tau me me, nrog rau kev sib raug hauv qab tseem ceeb thiab kev caij nres tseem ceeb. Asynchronous motors feem ntau tuaj yeem sib raug nrog rau qhov chaw siv khwv los ntawm cov contactors lossis soft starters, kom txo qhov sijhawm thiab kev nyuaj. Qhov kua meej thiab kev yooj yim ntawm kev sib raug hauv qab tseem ceeb tsim asynchronous motors yooj yim rau hauv qhov chaw nyob nyuaj.

Kev caij npliag rau cov cuab yeej tsis sib haiv tuaj mus raws li kev tso cai tshwj xeeb, thiab feem ntau siv tau hauv qhov chaw uas tsis muaj kev pheej hmoo. Qhov tsis muaj slip rings lossis commutators hauv squirrel cage txoj kev tsim kho tshem tawm ntau qhov chaw uas yuav tsum tau rov kho, yog li ntawd pab tiv thaiv kev ua haujlwm zoo hauv qhov chaw tseem ceeb.

Hauv qhov chaw muaj dej, av lossis dundob uas tsis zoo, cov cuab yeej tsis sib haiv zoo dua. Kev tsim kho cov chaw ncaws tseg pab tiv thaiv cov ntsiab lus hauv, thaum kuj tiv thaiv kev tsha hluas, thiab qhov tsis muaj kev sib raug siab sab nraud yog li tsawg dua kev puas tsuaj kom compared to wound rotor lossis synchronous motor designs.

Kev Tiv Thaiv Thiab Hom Kes Rov Siv

Kev txhim kho theem rau asynchronous motors feem ntau yog txhajus rau kev siv lubrication rau bearing, kev soj ntsuam insulation, thiab kev tshawb xyuas kev sib piv ntawm qhov chaw. Qhov tsim nyiaj meej meem no txo qhov yuam sij tshaj tawm rau kev txhim kho, ntau qhov motors tso caij ntau xyuas li ntawm ob pej xeem nrog rau kev txhim kho theem tsuas yog tshaj tawm. Kev kho dua bearing yog qhov yuam sij tshaj tawm tshaj plaws nyob rau hauv sijhawm nyob ntawm motor.

Synchronous motors xav tau kev txhim kho ntxiv vim muaj excitation system, slip rings, thiab kev txhim kho ntxiv tshaj. Kev tshawb xyuas tag nrho ntawm brush assemblies, slip ring surfaces, thiab excitation equipment tshaj tawm rau kev txhim kho ntxiv thiab ntau nqi. Tab sis, kev txhim kho ntxiv no feem ntau yog txhais tau tias zoo tshaj nyob rau hauv kev siv uas cov kev pab cuam zoo tshaj yog txhais tau tias tshaj tawm rau kev txhim kho ntxiv.

Kev siv kev tshawb nrhiav kom paub thaum twg yuav tsum rov saib xyooj hniav muaj nyob rau ib txoj hlua sib thooj ob leeg, tabsis nws tseem tsim nyog rau cov hlua sib cuag vim tias nws muaj qhov nyuaj dua thiab ntau nqi dua. Kev soj ntsuam kev sib thooj, kev soj ntsuam kub, thiab kev soj ntsuam lwm hom kev sib raug zoo, pab pom cov teeb meem uas yuav tshwm sim ua ntej thaum lawv tsim kev phom sij lossis tshav ntuj ntev.

Kev su kom paub ntau nqi thiab cov xyaum txheej txheem

Ntau nqi pub kaum thiab kev sau npe los tau

Ntau nqi xa nqi feem ntau nyob rau hwm cov hlua sib thooj vim tias tsim nyog meej dua thiab tsim ntau dua. Qhov siv hluav taws xob sib thooj ntau nyob rau kev lag luam tsim qhua tshwm sim kev ruaj nqa hauv kev tsim kho thiab pab ntau nqi muaj qhov sib txawv zoo hauv qhov loj li cas. Cov kev tsim nyog tsha yuav muaj nyob tam sim thaum tsis tas rov xeem.

Qhov muaj zog sib txig tau qhov muaj nuj nqi dua vim tias tsim nyog meej dua, cov chaw pab cuam, thiab feem ntau yog tsawg dua hli. Cov khoom siv zoo tshwj xwm rau kev sib txig, suav nrog cov cuab yeej pab cuam, cov rooj hlau hlau, thiab cov system kho kom raug, tuaj yeem ua rau nqi pheej hmoo tshaj plaws uas yuav tsum tau piav qhia los ntawm kev siv haujlwm zoo lossis kev siv tswv yim tshwj xwm.

Kev pab cuam tshuam ntau yam khoom siv kuj sib txawv ntawm lub ru tsev siv hluav taws xob, thiab lub ru tsev asynchonous yuav xav tau qhov chaw saib xyuas meej meej dua thiab feem ntau yuav xav tau khoom siv rau kev hloov pauv ntau yam tshwm sim. Lub ru tsev synchronous yuav xav tau qhov chaw saib xyuas kev tso hluav taws xob, tab sis tsis xav tau khoom rau kev hloov pauv ntau yam tshwm sim, ua rau muaj kev sib piv ntau yam khoom siv uas nyob ntawm kev siv meej meej thiab kev tshwm sim hluav taws xob ntawm chaw siv.

Nqi Siv Haujlwm

Yam tseem ceeb ntawm kev siv hluav taws xob zoo li cas nyob rau hauv kev siv hluav taws xob thaum siv tsis ncig, vim tias kev siv hluav taws xob me me tuaj yeem txawj ntau rau hauv kev lag luam thaum siv tau ntev. Cov motor synchronous feem ntau muaj kev siv hluav taws xob zoo dua 1% los 3% dhau cov motor asynchronous, uas tuaj yeem pab kom cov nqi ntxig nrog tsawg dua los pab kom yooj yim dua.

Cov kev pab zoo los ntawm cov motor synchronous tuaj yeem pab kom cov nqi hluav taws xob tsawg dua rau qhov chaw uas muaj nqi ntau lossis muaj nqi tshwj xeeb rau kev siv hluav taws xob. Qhov siv hluav taws xob zoo li unity lossis leading tuaj yeem tshwmsim cov nqi hluav taws xob tsis txaus, thiab tuaj yeem pab kom tsawg qhov kev loj li cas rau qhov chaw hluav taws xob, pab tau kev lag luam hauv ob lub sijhawm.

Cov nqi saib xyuas feem ntau yog tias muaj kev pab rau cov motor asynchronous vim tias qhov tsim nyog yooj yim dua thiab muaj meej ntsiab tsawg dua. Tab sis, lub sijhawm siv ntev dua uas feem ntau pom los ntawm cov motor synchronous uas tau raug saib xyuas zoo tuaj yeem pab kom cov nqi saib xyuas tsawg dua, vim tias tsis tas saib xyuas tas li thiab tsis tas hloov khoom tas li.

Qhov Tswj Kev Ntawm Txheej Nyob

Kev Siv Thaj Chaw Txoj Keem

Kev siv hauv kev txhim kho tshuab tsis tu ncua xwb, zoo li tshuab ntxuav dej, tshuab sov ntau, thiab tshuab nqus dej feem ntau nyob rau hauv qhov kev sib txuas ntawm tshuab nqus dej. Qhov kev saib xyuas meej meej thiab qhov tshwm sim zoo tshaj plaws ua rau tshuab nqus dej muaj zog tshaj plaws, yog li ntawd tshuab nqus dej muaj zog tshaj plaws no yooj yim tshaiv kom meej meej thiab meej duab dua. Kev siv hauv qhov chaw ntau dua ua rau qhov kev tshwm sim zoo tshaj plaws ntau dua, ua rau tshuab nqus dej muaj zog tshaj plaws no muaj kev tshaiv zoo dua thaum twg muaj tus nqi pib siab dua.

Kev xav tau kev hloov pauv ntawm kev nqus zog feem ntau txhawb nqa tshuab nqus dej tsis tu ncua nrog kev sau npe rau kev nqus zog. Qhov kev sib txuas no muab kev saib xyuas meej meej, kev tshwm sim zoo tshaj plaws, thiab kev trol kev txhim kho tshuab hauv qhov kev ua haujlwm ntau. Kev siv hauv qhov chaw zoo li tshuab nqus khoom, tshuab sau khoom, thiab kev nruj khoom feem ntau nyob rau hauv qhov kev trol kev hloov pauv thiab qhov kev nyiaj ib tug txaus siab.

Qhov siv hauv kev lag luam uas xav tau kev tswj xyuas kub yooj yim feem ntau nyiam cov cuab yeej synchronous rau lawv tus pov thawj kom pens kom zoo dua. Cov chaw ua haujlwm muaj ntau cuab yeej, khoom siv tsis zoo lossis qhov xwm yeem tswj xyuas kub yooj yim feem ntau pom tias cuab yeej synchronous muab kev pab tshwj xeeb tawm los ntawm qhov siv cuab yeej ib leeg.

Hob thiab Qhov Chaw Siv

Qhov siv nyob rau hauv qhov chaw nyuaj feem ntau nyiam cov cuab yeej asynchronous vim tias lawv muaj qhov tsim nyog meej meej thiab tsis muaj slip rings lossis khoom sib sau nruj ntau yam. Kev lag luam kho kho, kev lag luam kho mob thiab kev siv rau ntuj siab feem ntau nyob zoo rau qhov tsim nyog tsim nyog thiab kev siv tsis tas yuav tau saib xyuas ntau ntawm cov cuab yeej asynchronous squirrel cage.

Cov kev siv tshuaj xyuas xav tau kev nyab xeeb loj tshaib tuaj yeem txhais hais tias yog ib qhov kev xaum thiab tsis muaj kev phom sij, tshwj tsis yog thaum muab rau nrog cov chav tshuaj siv roj thiab cov khoom siv siv sijhawm kom meej. Kev sauva caij nyoog zoo thiab kev ua haujlwm zoo tuaj yeem muaj txiaj ntsig rau cov kev siv tshuaj xyuas uas tsim nyog ntau tshaj li tus nqi nthwv rau kev siv tshuaj xyuas synchronous.

Kev xam pom ntawm kev pib siv tshuaj xyuas tuaj yeem txhawj xeeb rau kev xaum tshuaj xyuas, uas asynchronous motors muaj lub siab pib nyob hauv nws tus kheej, tab sis synchronous motors xav tau kev xaum pib tshiab. Cov kev siv tshuaj xyuas uas pib ntau zaus lossis muaj kev pib nyuaj feem ntau nyiam asynchronous motors vim nws tsim nyog thiab nyab xeeb.

FAQ

Yog twg yog qhov sib txawv tshaj plaws ntawm asynchronous thiab synchronous motors?

Qhov sib txawv tseemceeb yog hauv qhov roj teeb rotor nyob rau hauv qhov kev sib piv rau qhov chaw sib tshuam. Cov hlooj sib txawv tsis sib xws tsim kev sib txawv, thiab yog li ntawd qhov siab ntawm qhov rotor yog me me tsawg dua li qhov siab sib xws ntawm qhov chaw sib tshuam. Cov hlooj sib xws sib xws tshem qhov siab ntawm qhov rotor sib xws tshaj qhov siab ntawm qhov chaw sib tshuam, txuag kev sib xws sib xws. Qhov sib txawv no txhawm rau kev sib txawv nyob rau hauv kev sib txawv, kev txhim kho kev siab, thiab kev sib txawv hauv qhov kev txhim kho kev tshwm sim.

Yog li cas hom hlooj twg muaj kev nyab xeeb tshaj?

Cov hlooj sib xws feem ntau txuag kev nyab xeeb tshaj, tshaj tawm rau cov loj tshaj 500 horsepower. Qhov sib txawv ntawm kev nyab xeeb yog ntawm 1% thiab 3% kom sib piv rau cov hlooj sib txawv tsis sib xws, tshaj tawm yog li qhov tsis muaj kev sib tshuam ntawm qhov rotor uas sib txawv. Tab sis, cov hlooj sib txawv tsis sib xws tshiab muaj kev nyab xeeb tshaj, uas tau txo qhov sib txawv no tas li, ua rau qhov sib txawv ntawm kev nyab xeeb tsis tshaj tawm hauv cov hlooj me me.

Yuav vim li cas cov hlooj sib txawv tsis sib xws muaj qhov kev tshwm sim tsawg dua li cov hlooj sib xws?

Qhov siv hluv tsis sib xws yuav xav tau lub hluv tso caij kom tsim qhov chaw tso siab hluv hauv qhov roj kom los ntawm kev tso caij, tsim kev xav tau hluv tso caij uas cuam tshuam rau lub hluv tso caij, ua rau lub hluv tso caij tsawg dua. Lub hluv tso caij no nyob siab zoo ib yam piv rau qhov siv hluv me me, ua rau lub hluv tso caij tsawg heev thaum siv me me. Qhov siv hluv sib xws siv DC kom tso caij rau qhov chaw tso siab hluv hauv roj, tshem tawm kev loss ntawm kev tso caij, thiab pab suav tau lub hluv tso caij los ntawm kev hloov kho qhov tso caij.

Yog li cas qhov siv hluv yuav xav tau kev saib xyuas ntau tshaj?

Zooj zaum tsis sib xoo, tshaj tshwv tsis sib xoo nrog qhov chaw tsim nyob, yuav tsum tau kev daws teeb meem tsawg heev vim qhov tsim nyob tsim nyob tsis muaj qhov chaw nqaj, tawv lossis kev sib cuag nrog hluav taws xob. Kev daws teeb meem siv sijhawm tshaj tshwv rau kev siv neeg sib ntxiv thiab kev soj ntsuam me me. Zooj zaum sib xoo yuav tsum tau txhim kho ntau dua rau kev sib cuag, qhov chaw nqaj thiab tawv, uas txav ntau dua thiab ntau dua. Tab sis, kev txhim kho ntau no feem ntau yuav txhim kho sijhawm zooj zaum thaum muaj kev txhim kho tshaj tshwv.