Blog

February 18, 2017

Loipālākiō Hawaii o KEMET Tantalum Capacitor

Pinepine e nana ma ka mana lako, he stress ua hoʻokomo o capacitance ( KEMET tantalum mea pihana RMS Kumuhana o kēia). Ina oe e hoomaopopo ole ia pono, he pono nō e hana aku i ka capacitance ( KEMET tantalum mea pihana Overheating a premature ole). Ma ka dia mīkini hoʻololi, me ka hahai approximation, ke auoiaea pono o ka (Io) a me ka hana kalapona (D) hiki ke pōpilikia eaaei RMS:

Loipālākiō papa KEMET tantalum capacitor


Kii 1 hōʻike i ka hālawa o ka hōʻike; ka mea, ua he hoʻopoepoe, ka mea i hoike ia 50%, i ka i kā mākou o 0.5 hana hiʻohiʻona, a me ka hana lākiō me 2 i ka 0% a me 100% noʻole ma kela aoao. Ka hālawa ma ka 50% dute kalapona kokoke symmetry. Ma waena o 20% a me 80%, ma waena o nā RMS Kumuhana o kēia, a me ka auoiaea pono, ua oi mamua o 80%. Ka hoʻohanaʻana i ka laulā o ka hana hiʻohiʻona, e hiki koʻikoʻi manaʻo no ka mea, 1 / 2 RMS pono i kā mākou ia auoiaea pono. Ma keia laulā, oe pono e hana i ka AYEIE i ka ho omaulia.

Loipālākiō papa KEMET tantalum capacitor

In Kii 1 1 / 2 auaiaea pono ma ka hoʻokomo o capacitor RMS Buck he piko

Ma ka mau makahiki i hala, i ka elua pālolo capacitor ka leo ka hoʻokōʻana a me ka waiwai e lilo aku, ua i ka holomua nui. Ka pālolo capacitor ua ano lilo ka pahuhopu nui o ka mana lako bypass.However, i ko lakou haahaa ESR, e kauoha koke aku e hailona o na pilikia, e like me: Emi Kānana ma ka mana a me ka oscillation anakahi uila kēia ulia. Laua (electrolytic capacitor KEMET tantalum mea pihana ) Ua pinepine hoʻohana 'e uhi ia mau kiʻekiʻe Q. Ma keia mau hihia, oe e hoʻolohe i ka ripple pono iloko o ka electrolyte, no ka mea, o ka mana lako ripple ke au e ho'ōla komo he nui loa o ka electrolytic capacitor. Kii 2 hōʻike he 100 kHz hoʻokomo o capacitor E kuapo laʻana, ke hoʻokomo o capacitance ma ka electrolytic capacitor ma laua me ka 10 Bufa pālolo capacitor, moʻo e kū'ē'ē mai, a me ka electrolytic capacitor hoopii 0.15 ohmic like paha (ESR). Holoholo i ka electrolytic capacitor capacitance ma mua o ka pālolo capacitor, ma keia hihia, RMS paha 70% o ka poe pono iloko o ka electrolyte. E emi ka RMS he, e hiki mahuahua i ka alapine, a me ka pālolo capacitor like moʻo ia'ku (ESR). Ma ka hoʻohana 'ana Fourier moʻo capacitive pono ke kikoo i ka hālawa e hoʻomaulia i kela a me keia harmonic (i i 10) o ka electrolytic capacitor pono, huina he RMS, a hou' ana me ka hui pu ana o harmonic i ka ho omaulia o electrolytic capacitor. ʻOluʻolu E hoailona oukou ia ia ke Kumuhana o kēia ESR, a me ke koena unuhi o ka pālolo capacitor 1 / 4 kalapona ma ka pae, nolaila, aole lakou e manao e like me ka maʻi lele. Ina aole oe e makemake, e kali manawa iloko o keia mau helu, e hiki ke hana pela, ma he papa kahi, a ekolu OE eiiiiiaiou maʻalahi ka huakai kaapuni Nā kauoha.

Loipālākiō papa KEMET tantalum capacitor


Kii 2 ka hoʻohanaʻano o ka capacitor electrolytic capacitors ( 'oluʻolu e hoailona oukou ia KEMET tantalum mea pihana Hawaii)

O ka pokole, nānā i ka RMS he hoʻokomo o capacitor, no ka mea, ka mea he stress e emi i ka pono o ka capacitor. Hui capacitorʻano oi aku ma ka pono o ka kūikawā noonoo, no ka mea, pālolo capacitors pele ae ripple anakahi uila kiʻekiʻe lawa e lilo i overcurrent ano iloko o laua electrolytic capacitor. Ka ninau wehe pilikia papa hana no lakou e hoonui mai i hookahi a oi aku o ka penei: hana alapine (frequency), mea, pālolo capacitor electrolytic capacitor ESR a RMS Loipālākiōʻikena.


Ka hahai ana oia i ka derivation o na RMS hoʻokomo pono iloko o ka capacitor, ke assumption o ka mana loa inductance. Ka huinahń pāpaʻa (D0.5 * Ipk) o ka RMS pono e like me ka hoʻomaka, ae lawe aku i ka DC ke keʻena (D * Ipk).

Loipālākiō papa KEMET tantalum capacitor

Tantalum mea pihana
About tantalumcaps