ozi

N'imePFC na-agbanwe ọkụ ọkụ, Mgbanwe ọkụ ọkụ na-achịkwa ọkụ ọkụ bụ akụkụ dị oke mkpa.Ọrụ ọkụ ọkụ na-agbanwe agbanwe na PFC adịghị iche na ọkụ ọkụ nkịtị, mana enwere ọdịiche dị na ọkụ ọkụ.Ọkụ ngbanwe nkịtị na-achọ ọkụ nrụzi 220V, ebe PFC na-enye ike site na B+PFC.

Mgbe emezichara, a naghị agbakwunye capacitor nzacha, yana voltaji nke ọkara okirikiri nke na-adịghị mma na-eji dị ka ike ọkọnọ nke chopper.Ebe ọ bụ na a na-egbutu voltaji dị mma nke chopper n'ime ụdị ebili mmiri dị ugbu a, njirimara nke waveform bụ:
1. Ụdị ebili mmiri dị ugbu a na-akwụsị, na envelopu ya bụ otu ihe ahụ dị ka voltaji waveform, na akụkụ nke envelopu na voltaji waveform bụ otu.
2. N'ihi mmetụta nke ịcha, ọkara-pulsating DC ike na-aghọ elu-ugboro (kpebiri site n'ikuku ugboro, banyere 100khz) "AC" ike.A ga-emezigharị ike “AC” a dị elu ọzọ tupu ejiri ike ngbanwe PWM na-esote chịkwaa ya.
3. Site n'ozuzu echiche nke mpụga ike ọkọnọ, ike usoro na-enweta na AC voltaji na AC ugbu a na-adọ na voltaji na nke ugbu a waveforms na akara na sinusoidal waveform, nke na-abụghị nanị na-edozi nsogbu nke ike na-akpata ụgwọ, ma na-edozikwa nsogbu nke ndakọrịta electromagnetic na nnyonye anya electromagnetic.

A na-emezi ike dị elu nke "ọhụụ nke ugbu a" site na diode rectifier wee tụba ya n'ime voltaji dị ugbu a wee nye ya na ọkụ ọkụ PWM na-esote.A na-akpọkwa voltaji DC a B+PFC.Mpụta voltaji B+PFC site na chopper na-adịkarị elu karịa +300V ka nhazi na nzacha AC 220 mbụ.Ihe kpatara ya bụ na a na-ahọrọ eriri voltaji dị elu, eriri eriri nke inductor dị ntakịrị, na voltaji akara na-agbada obere.Ikike nke capacitor nzacha dị ntakịrị, yana nsonaazụ nzacha dị mma, yana enwere ọtụtụ uru dị ka obere ihe achọrọ maka tube mgba ọkụ PWM mgbada.

Ka ọ dị ugbu a, na akụkụ PFC na-agbanwe ike ọkụ, tube chopper nke na-arụ ọrụ dị ka mgba ọkụ nwere ụdị ọrụ abụọ:
1. Ọnọdụ conduction na-aga n'ihu (CCM): Oge na-arụ ọrụ nke tube na-agbanwe agbanwe na-agbanwe agbanwe na njupụta nke voltaji chopping.
2. Akwụsịtụ conduction mode (DCM): Ugboro ugboro nke chopper switch tube na-agbanwe na size nke chopping voltaji.

NkePFC na-agbanwe ike ọkọnọakụkụ na mkpali akụkụ nke PWM ịgbanwee ike ọkọnọ akụkụ na ike ihe mgbazi ịmafe ike ọkọnọ na-emecha niile site a integrated sekit, na otu IC nwere ike mezue imewe.