Pehea e hooholo i ka mana resistors. Power resistors ma laua pilina

All mīkini uila no hoʻohui pū resistors, nō kā lākou mau papa kuhikuhiE hehee ai. Me ia, hoʻololi i ka nui o ke kala pono i loko o ka pou huakai kaapuni. Ka 'atikala i kekahi ka waiwai o resistors, a me kā lākou mana o ka ho omaulia ki ina hana like.

hookohu mea pale mū holapū

E hoʻomaʻa e hoʻohana i kaʻikena resistors ma ka pou wahi i puhi ai. Keia waiwai ua ho'ākāka 'ia ma ka Ohm ka kānāwai:

I = U / R (1)

Mai haʻilula (1) hiki ke akaka ike i ka uuku o ka ia'ku, i ka nui o kaʻikena, piʻi pū, a me conversely, me ka uuku o ka R, ka mea i oi aku i kaʻikena. He keia waiwai o ka uila ia'ku ua hoʻohana 'ia i loko o uila wilikî. Ma ke kumu o keia haʻilula iʻikena mahele waiwai kaapuni mau hoʻohana 'ia i loko o pou manaʻo.

Ma keia huakai kaapuni a ka mea pono, mai ke kumu ua maheleia i mau inversely hapaʻauhau i ka ia'ku o resistors.

Iʻikena kōā resistors hoʻohana i loko o ke anakahi uila mahele waiwai. Ma keia hihia, hou hoʻohana Ohm ka kānāwai, akā, i loko o ka ikiʻokoʻa palapala:

U = I ∙ R (2)

Mai haʻilula (2) e maoli he me e māhuahua ia'ku anakahi uila. Keia waiwai ua hoʻohana 'ia e kūkulu i puhi ai anakahi uila mahele waiwai.

Mai ke kiʻikuhi a me ka haʻilula (2) ka mea, ua ike i ke anakahi uila ma na resistors i māhele i kupono i ka ia'ku.

Image resistors manaʻo

E like me ka mea maʻamau i resistors i na poe ma ka rectangle me Ana o 10 m 4 mm o, a denoted ma ka palapala R. mana resistors ma ka noaia pinepine Hōʻike. Ke kiʻi o keia anakahi ua hana ma ka pololei a me kēlā dashes. Inā i ka mana o ka 2 watts, ka inoa ua hanaia ma Roma numerals. Keia ua ana hana no ka uea resistors. Ma kekahi mau Hawaii, no ka mea hoike ma ka United States, nā hōʻailona i hoʻohana. E kōkua i ka hoʻoponopono a me ka Ikepili noaia ua pinepine kākau i nā mana resistors, ka inoa o ka i ua hana ia e like me ka GOST 2.728-74.

Kōmike 'ano o nā mea

I ka papa kuhikuhiE ano o ka mea pale mū holapū - ka palena iki ia'ku R _n, a ua hōʻike ma ke kiʻikuhi aʻe i ka mea pale mū holapū a me kona hale noho. Ke pa alima o ka ana o ka ia'ku - ko nā kilo a me nā mega. Ua hanaʻia resistors me ka ia'ku, mai mahele i ka haneri o ohms a me megohms. Aia nō he wahi lihi iki o ka enehana mea pale mū holapū? Iecaianoaaiiuo, a me ka mea a pau i pono a me keakea. I ka rula, aole mea ike loeaʻaʻohe mea e ae e like paka mea pale mū holapū me ka hoʻoholo ma mua ia'ku waiwai.

A lua nui ano o ka deflection e kū'ē'ē mai. Ua Ua ana i loko o% o ka palena iki huahelu R. Aia mea he maʻamau impedance haiahū kūmau: ± 20, ± 10, ± 5, ± 2, ± 1%, a ma luna o mai ai i ka waiwai o ± 0.001%.

Kekahi mea nui ano o ka mana resistors. I hana ka mea, e enaena, e ka he hala ma ia. Inā ka mana dissipation aku i ka allowable cia, laila, i ka mea aloha.

Me ka paio hahana maoli nō resistors hoʻololi i kā lākou ia'ku, no laila, no ka mea, he manaʻo ke hoʻohana i ke ākea wela huahelu, ua wahahee kekahi ano - mahana kaʻi lau waiwai o ke kū'ē'ē mai. Ua Ua ana i loko o ppm / ° C, a laila 10 ^-6 R _N / ° C (millionth hapa o ka R _N He 1 ° C).

Serial pilina o resistors

Nā resistors Hiki ke pili i ka ekolu naʻano likeʻole: pūkaʻina, ia laua a me ka hui. Me ka moʻo e pili ana i kaʻikena alternately holo ma nā mea a pau i ka resistors.

Me keia e pili ana i ka pono ma kekahi wahi i loko o ka huakai kaapuni o ka ia, ka mea hiki ke ho'ākāka 'ia ma ka Ohm ka kānāwai. Ke impedance kaapuni ma keia hihia o ka huina o ia'ku:

R = 200 + 100 + 51 + 39 = 390 ohms;

I = U / R = 100/390 = 0.256 A.

E hiki e ho oholo i ka mana resistors ma ka puke e pili ana, ka mea, he pōpilikia ma ka haʻilula:

P = I ² ∙ R = 0,256 ² 390 ∙ = 25,55 watts.

Like me, nona iho no ka i koe, ua nānā 'ia e na resistors:

P ₁ = au ₁ ² ∙ R ² = ^0,256 = ^13,11 ∙ 200 W;

P ₂ = I ² ∙ R ₂ = 0.256 ² ∙ 100 W = 6,55;

₃ P = au ² ∙ R ₃ = 0,256 ² ∙ 51 = 3.34 W;

P ₄ = au ² ∙ R ₄ = 0.256 ∙ ² 39 = 2.55 watts.

Inā e hookui aku i ka mana resistors, e loaʻa piha P:

P = 13,11 + 6,55 + 3,34 + 2,55 = 25,55 watts.

Ka laua pilina o resistors

I ka hoʻomaka o ka laua pilina o nā mea a pau resistors pili ana i ka ia kaapuni wahi, a me ka welau - i kekahi. I ka wa e piliʻikena lālā, a kahe ma kēlā me kēia mea. I ka nui o ka papa, e like me ka Ohm ka kānāwai, ka inversely hapaʻauhau i ka mea e kū'ē'ē mai, a me ka anakahi uila ma nā mea a pau i ka hookahi resistors.

Mua e huli i ka pono, ka mea i pono, e hoʻomaulia i ka huina conductivity o na resistors o ka luawai-ike haʻilula:

1 / R = 1 / R ₁ + 1 / R ₂ + 1 / R ₃ + 1 / R _{= 1/200 + 4 1/} 100 + 1/51 + 1/39 = 0.005 + 0.01 + 0.0196 + 0.0256 0.06024 = 1 / Ohm.

Ia'ku - ka inverse o conductivity:

R = 1 / 0,06024 = 16,6 ohms.

E ho ohana i Ohm ka kānāwai, huli i ka pono ma ke kumu:

I = U / R = 100 ∙ 0,06024 = 6,024 A.

Ike i ka pono ma ka kumu mana e pili ana ia laua i ka resistors o ka haʻilula:

P = I ² ∙ R = 6,024 ² ∙ 16,6 = 602,3 Watt.

E like me ke Ohm ka kānāwai ka pono ma ka mea pale mū holapū he pōpilikia:

Au ₁ = U / R ₁ = _100/200 = _0,5 A;

Au ₂ = U / R ₂ = _100/100 = 1 A;

₃ I = U / R ₁ = _100/51 = _1,96 A;

Au ₁ = U / R ₁ = _100/39 = _2,56 A.

Iki kekahi haʻilula hiki omaulia ana i ka mana resistors ma ka laua pilina:

P ₁ = U ² / R ^₁ = 100 _2/200 = 50 W;

P ₂ = U ² / R ^₂ = 100 ^_2/100 = 100 W;

P ₃ = U ² / R ^₃ = 100 _2/51 = _195,9 W;

₄ P = U ² / R ^₄ = 100 _2/39 = _256,4 watts.

Inā pau keia hoʻokomo mai, e loaa i ka mana resistors:

P = P ₁ + P ₂ + P ₃ + P _{= 50 + 4 100 + 195.9 +} 256.4 = 602.3 watts.

hui i huiia

Noaia hui hui resistors hoʻohui pū sequential, a i ka wā hoʻokahi laua pilina. Kēia noaia He oluolu e hoohuli, ke kūapoʻana i ka laua pilina o ka mea pale mū holapū ma ka moʻo. E puku i kēia mua ia'ku R ₂ a me R ₆ ma kā lākou, he pono ole R _2,6, ka hoʻohana 'ana i ka haʻilula ma lalo:

R _2,6 = R ₂ ∙ R ₆ / R ₂ + R _6.

Like me UAIAaIN e mau ia laua resistors R _4, R _5, R he _4.5:

R _4,5 = R ₄ ∙ R ₅ / R ₄ + R _5.

I ka hopena o ka hou, oi hemahema hoi puni. He mau manaʻo i hōʻike 'ia ma lalo nei.

Power resistors ma noaia hui hui ho'ākāka 'ia ma ka haʻilula:

P = U ∙ I.

No ka ho omaulia i kēia haʻilula mea mua anakahi uila ma kēlā me kēia mea pale mū holapū a me ka nui o kaʻikena therethrough. Hiki nō ke hoʻohana i kekahi papa hana, e hooholo i ka mana resistors. No keia haʻilula ua hoʻohana 'ia:

P = U ∙ I = (au ∙ R) ∙ au = au ² ∙ R.

Inā 'oe i wale i ke anakahi uila ma ka mea pale mū holapū, laila, e hoʻohana i kaʻokoʻa haʻilula:

P = U ∙ I = U ∙ (U / R) = U ² / R.

A pau ekolu nā papakuhikuhi mea pinepine ia ma ka hana.

I ka ho omaulia kaapuni kiko'î

I ka ho omaulia kaapuni kiko'î mea, e imi i na mea ike ole au paialewa a me voltages ma i na lala o ka huakai kaapuni'āpana. Me keiaʻikepili, ua hiki ke ho omaulia ua komo i ka mana o kēlā me kēia mea pale mū holapū i loko o ka huakai kaapuni. Simple i ka ho omaulia ki ina hana like i hoikeia mai ma luna, ma ka hana pono i ke kulana o oi huikau.

Ma maoli i puhi ai, he pono ole pilina o resistors hoku, a aaeuoa, i hana nui hihia i loko o nā helu. No ka simplifying na wahi i puhi ai hou 'epekema i Star triangle ua ulu, a me ka hope versa. Kēia papa hana ua ia manaʻo i loko o ke kiʻikuhi ma lalo nei:

Ke noaia mua i loko o kona haku mele 'ana o kekahi hoku i pili i na huahelu 0-1-3. K wahi 1 ua pili i ka mea pale mū holapū R1, a hiki i ka'āina 3 - R3, a me ka'āina 0 - R5. Ma ka lua o ka huakai kaapuni i pili i nā aka wahi 1-3-0 triangle resistors. I ka wahi 1 pili resistors R1-0 a me R1-3, e wahi 3 - R1-3 a me R3-0, a me ka'āina 0 - R3-0 a me R1-0. Kēia mau manaʻo i hoakaka like paha.

No ka mea hoʻololi, mai ka mua kaapuni a hiki i ka lua o ka triangle i mau hōʻailona i ko resistors:

R1-0 = R1 + R5 + R1 ∙ R5 / R3;

R1-3 = R1 + R3 + R1 ∙ R3 / R5;

R3-0 = R3 + R5 + R3 ∙ R5 / R1.

e hoemi i ka i ka ho omaulia ana o laua a me ka moʻo-pili resistors hou loli '. A hiki i ka impedance o ka huakai kaapuni ua loaʻa, loaʻa ma Ohm ka kānāwai ka pono ma ke kumu. E ho ohana i kēia kānāwai, ka mea, he mama, e imi i na paialewa i loko o nā mea a pau na lala.

Pehea e hooholo i ka mana o ka mea pale mū holapū ma hope o loaa i na paialewa? No keia mea, i ka luawai-ike haʻilula: P = au ² ∙ R, ana, huli i kā lākou kākoʻo no kela a me keia o kona e kū'ē'ē mai.

Hoʻokolohua hoʻoholo o nā 'ano o ka huakai kaapuni oihana mua

pono e ohi i ka hoʻoholo ma mua noaia o ka maoli ke keʻena no ka mana hoʻoholo no ka makemake 'ano o nā kumu mua. Ma hope o ia, a me ke kōkua o nā pou nā mīkini home hana a pau o ka mea ana. Kēia papa hana ka manawa e hoopau ana a me ka pipiʻi. Developers o ka uila a me ka mīkini uila no i hoʻohana ai no keia mea simulators. Me ia i hana i ka mea e pono ho, a hoohalike i ka hana ana o ka huakai kaapuni hehee wale i loko o kekahi wahi, i hiki. Wale ma hope o kēia e hele ana i ka prototype o ka oaoieei-lima kūlana kiʻekiʻe. I kekahi o kēia mau mea, he pono ole papahana mea he hōʻulu ikaika o Multisim 14,0 System National mea paahana a poe.

Pehea e hooholo i ka mana resistors me kēia polokalamu? Ua hiki ke hana ia ma nāʻaoʻao. Ka mua papa hana - mea e ana i ka pono a me ka anakahi uila me ka voltmeter a me ka ammeter. Hoonui i ka hopena o nā ana, ke koi 'ia mana ua loaa.

Mai keia huakai kaapuni e hoʻoholo i ka ia'ku R3 mana:

P ₃ = U ∙ au = 1.032 ∙ 0,02 = 0,02064 W = 20,6 mW.

Ka lua o ka hana - he pololei ana o ka mana ka hoʻohana 'ana i ka mana mika.

Mai keia huakai kaapuni a ka mea hōʻike i ka ia'ku R3 mea like me ka mana P ₃ = 20.8 mW. Ke discrepancy aie i ka wahaheʻe i loko o ka iaoia mua aku. Like me, ka mana o na kumu mua i koe i paa.