Ihe anọ dị mkpa nke ngwaọrụ nchekwa elu (SPD)

Ngwaọrụ nchebe elu (SPD) bụ ngwaọrụ eletrọniki nke na-enye nchekwa nchekwa maka ngwa eletrọniki dị iche iche, ngwa, na ahịrị nkwukọrịta. Mgbe ọkụ eletrik ma ọ bụ voltaji mberede mere na ahịrị eletriki ma ọ bụ ahịrị nkwukọrịta n'ihi nnyonye anya mpụga, ihe nchebe mmụba nwere ike iduzi ma gbanwee mmụba ahụ ngwa ngwa iji gbochie mmebi na ngwaọrụ ndị ọzọ dị na sekit ahụ. E nwere paramita anọ dị mkpa ịtụle mgbe a na-enyocha SPD:

1. Oke voltaji ọrụ na-aga n'ihu (Uc) Uc na-ezo aka na oke voltaji rms (RMS) ma ọ bụ DC nke enwere ike itinye na ọnọdụ nchekwa SPD. N'ụzọ bụ isi, ọ na-anọchite anya voltaji enyere ọkwa nke SPD. Uru Uc metụtara ndụ ọrụ na ọkwa nchekwa voltaji nke SPD. Ọ bụ ezie na ịhọrọ uru Uc dị elu nwere ike ịgbatị ndụ ọrụ nke ngwaahịa ahụ, ọ ga-emekwa ka voltaji fọdụrụ dịkwuo elu, nke na-emebi ihe echekwara.

2. Ọwa mwepụ aha (In) In bụ ọwa kachasị elu nke ebili mmiri ugbu a 8/20μs na-agafe na ihe nchebe mmụba. Ọkọlọtọ SPD na-akọwapụta usoro nke ụkpụrụ In. Mgbe ị na-emepụta ma na-emepụta ụdị SPD kpọmkwem iji ruo ọkwa kpọmkwem, a na-ahọrọ uru In kwekọrọ na usoro In maka nnwale. Nnwale na-aga nke ọma na-ekpebi uru ahọpụtara dị ka uru In nke SPD.

3. Oke mmiri mgbapụta kachasị na ule klas nke abụọ (Imax) Imax na-anọchite anya oke mmiri mgbapụta nke 8/20μs na-agafe na ihe nchebe surge na ule klas nke abụọ. Ọ bụ ezie na nkọwa nke paramita a yiri oke mmiri mgbapụta aha (In), ọkọlọtọ SPD na-enye ọtụtụ uru Imax n'akụkụ usoro In, na n'ime otu ọkwa ahụ, Imax > In. Ya mere, SPD gafere ule na ọkwa In kpọmkwem anaghị ekwe nkwa na SPD nwere otu ọkwa Imax ga-agafekwa ule ahụ. Ọ bụ ezie na In na Imax bụ ma ụkpụrụ kachasị elu nke ebili mmiri ugbu a 8/20μs, uru kachasị elu na ọnụọgụ ugboro ole ugbu a gafere n'oge ule ahụ dị iche.

4. Ọkwa nchekwa voltaji (Ukwu), nke a makwaara dị ka voltaji fọdụrụ, na-ezo aka na voltaji gafere SPD mgbe ọkụ eletrik nwere ụdị ebili mmiri akọwapụtara na-agafe na SPD mgbe SPD malitere. Paramita a dị oke mkpa iji chebe voltaji na-eguzogide nke akụrụngwa echekwara ma kwesịrị ịdị ala karịa voltaji na-eguzogide nke akụrụngwa echekwara.

Ịghọta na inyocha paramita ndị a dị oke mkpa maka ngwaọrụ nchekwa mmụba. Ntụle kwesịrị ekwesị na nhọrọ nke SPDs dabere na paramita ndị a ga-eme ka ha nwee nchekwa dị irè maka ngwa eletrọniki, ngwa na ahịrị nkwukọrịta, na-ebelata mmebi sitere na mmụba na mmụba.