Usoro mmepụta nke ike dị elu MOSFET ịnya ụgbọ ala

Enwere isi ihe ngwọta abụọ:

Otu bụ iji mgbawa ọkwọ ụgbọ ala raara onwe ya nye MOSFET, ma ọ bụ iji fotocoupler ngwa ngwa, transistors mejupụtara sekit iji kwọọ MOSFET, mana ụdị ụzọ mbụ chọrọ inye ọkụ ọkụ kwụụrụ onwe ya; ụdị nke ọzọ nke pulse transformer na-anya MOSFET, na na pulse mbanye sekit, otú e si melite ngbanwe ugboro nke mbanye sekit ka iwelie ike ịnya ụgbọ ala, dị ka o kwere mee, iji belata ọnụ ọgụgụ nke components, bụ mkpa ngwa ngwa. iji dozieNsogbu ugbu a.

Ụdị nke mbụ nke atụmatụ mbanye, ọkara akwa mmiri chọrọ ọkụ ọkụ abụọ nwere onwe ha; zuru-akwa na-achọ atọ nọọrọ onwe ike onunu, ma ọkara-akwa na full-akwa, ọtụtụ components, adịghị mma na-eri ibelata.

Ụdị nke abụọ nke usoro ịkwọ ụgbọala, na patent bụ ihe kacha nso tupu nkà maka aha mmepụta ihe "ike dị eluMOSFET mbanye sekit" patent (ngwa ngwa nọmba 200720309534. 8), patent naanị tinye a ihapu iguzogide hapụ ọnụ ụzọ ámá isi iyi nke elu-ike MOSFET ụgwọ, iji nweta nzube nke imechi ala, ọdịda nsọtụ nke PWM mgbaàmà bụ nnukwu. ọdịda ọdịda nke mgbaàmà PWM buru ibu, nke ga-eduga na nkwụsị nke MOSFET ngwa ngwa, ọnwụ ike dị ukwuu;

Tụkwasị na nke ahụ, ọrụ patent MOSFET na-enwe ike ịdaba na nnyonye anya, na mgbawa njikwa PWM kwesịrị inwe nnukwu mmepụta ike, na-eme ka mgbawa okpomọkụ dị elu, na-emetụta ndụ ọrụ nke mgbawa. Ọdịnaya nke mepụtara Ebumnuche nke ụdị ịba uru a bụ iji nye sekit mbanye MOSFET dị elu, na-arụ ọrụ kwụsiri ike na efu iji nweta ebumnuche nke ihe nrụpụta teknụzụ a na-emepụta ngwa ngwa - sekit MOSFET mbanye dị elu, nsonaazụ mgbaàmà nke ejikọrọ mgbawa njikwa PWM na transformer pulse bụ isi, nke mbụ mmepụta of a na-ejikọta ihe ngbanwe nke abụọ na ọnụ ụzọ MOSFET nke mbụ, mmepụta nke abụọ nke transformer nke abụọ na-ejikọta ya na ọnụ ụzọ MOSFET mbụ, mmepụta nke abụọ nke transformer pulse na-ejikọta na ọnụ ụzọ MOSFET mbụ. A na-ejikọta mmepụta nke mbụ nke pulse transformer secondary na ọnụ ụzọ MOSFET nke mbụ, mmepụta nke abụọ nke pulse transformer secondary na-ejikọta ya na ọnụ ụzọ ámá nke MOSFET nke abụọ, nke e ji mara na a na-ejikọtakwa mmepụta mbụ nke pulse transformer secondary. na transistor mwepu nke mbụ, na mmepụta nke abụọ nke pulse transformer secondary na-ejikọkwa na transistor mwepu nke abụọ. Akụkụ bụ isi nke ihe ngbanwe nke pulse na-ejikọtakwa na nchekwa ike na sekit ntọhapụ.

Sekit ntọhapụ nke ike na-agụnye resistor, capacitor na diode, resistor na capacitor na-ejikọta ya n'otu oge, na sekit yiri nke ahụ e kwuru n'elu jikọtara ya na usoro na diode. Ụdị ihe eji eme ihe nwere mmetụta bara uru Ụdị ọrụ ahụ nwekwara transistor mwepu nke mbụ jikọtara ya na mmepụta nke mbụ nke transistor nke abụọ, na transistor nke abụọ na-ejikọta ya na mmepụta nke abụọ nke pulse transformer, nke mere na mgbe pulse transistor na-emepụta obere ala. ọkwa, MOSFET nke mbụ na MOSFET nke abụọ nwere ike ịwepụta ngwa ngwa iji meziwanye ọsọ nkwụsị nke MOSFET, yana belata mfu MOSFET. Ihe mgbaàmà nke mgbawa njikwa PWM jikọtara ya na Mmụba mgbaàmà MOSFET n'etiti mmepụta mbụ na pulse transformer primary, nke enwere ike iji maka mmụba mgbaàmà. A na-ejikọta nsonaazụ mgbaama nke mgbawa njikwa PWM na ihe ngbanwe bụ isi na MOSFET maka mmụba mgbaàmà, nke nwere ike imeziwanye ikike ịnya ụgbọ ala nke mgbaàmà PWM.

The isi pulse transformer na-ejikọta ya na sekit ntọhapụ nchekwa ike, mgbe mgbaàmà PWM dị na ọkwa dị ala, sekit nchekwa nchekwa ike na-ewepụta ike echekwara na ihe ntụgharị pulse mgbe PWM nọ n'ogo dị elu, na-ahụ na ọnụ ụzọ ámá. isi mmalite MOSFET mbụ na MOSFET nke abụọ dị oke ala, nke na-ekere òkè na igbochi nnyonye anya.

Na mmejuputa a kapịrị ọnụ, MOSFET Q1 dị ala maka mmụba mgbaàmà na-ejikọta n'etiti akara mmepụta akara A nke mgbawa njikwa PWM na isi nke pulse transformer Tl, a na-ejikọta ọnụ ụzọ mmepụta mbụ nke nke abụọ nke ntụgharị pulse. Ọnụ ụzọ MOSFET Q4 nke mbụ site na diode D1 na onye na-anya ụgbọ ala Rl, a na-ejikọta ọnụ ụzọ nke abụọ nke ihe ntụgharị nke pulse na ọnụ ụzọ nke abụọ. MOSFET Q5 site na diode D2 na onye na-anya ụgbọ ala R2, na njedebe mmepụta nke mbụ nke sekọndịrị nke ihe ntụgharị ọkụ na-ejikọta ya na nke mbụ drain triode Q2, na nke abụọ drain triode Q3 na-ejikọta na nke abụọ drain triode Q3. MOSFET Q5, a na-ejikọkwa ọnụ ụzọ mmepụta mbụ nke pulse transformer secondary na transistor mbupu Q2 nke mbụ, na njedebe nke abụọ nke pulse transformer secondry na-ejikọta ya na transistor nke abụọ Q3.

Ọnụ ụzọ ámá nke MOSFET Q4 nke mbụ jikọtara ya na onye na-agbapụta mmiri R3, na ọnụ ụzọ MOSFET Q5 nke abụọ jikọtara ya na onye na-agbapụta mmiri R4. A na-ejikọkwa isi nke pulse transformer Tl na nchekwa ike na sekit ntọhapụ, na nchekwa ike na sekit ntọhapụ gụnyere resistor R5, capacitor Cl, na diode D3, na resistor R5 na capacitor Cl jikọtara na ihe yiri ya, na sekit yiri nke ahụ e kwuru n'elu na-ejikọta n'usoro na diode D3. ihe ngosi PWM sitere na mgbawa njikwa PWM jikọtara ya na MOSFET Q2 dị ala, yana MOSFET Q2 dị ala na-ejikọta ya na nke abụọ nke ntụgharị pulse. a na-emewanye ya site na MOSFET Ql dị ala na mmepụta ya na isi nke ihe ntụgharị ụbụrụ Tl. Mgbe mgbaàmà PWM dị elu, ọnụ ahịa mmepụta mbụ na njedebe nke abụọ nke abụọ nke pulse transformer Tl mmepụta ọkwa dị elu iji mee ka MOSFET Q4 mbụ na MOSFET Q5 nke abụọ na-eduzi.

Mgbe mgbaàmà PWM dị ala, mmepụta nke mbụ na mmepụta nke abụọ nke pulse transformer Tl nke abụọ mmepụta ọkwa dị ala, transistor nke mbụ Q2 na nke abụọ transistor Q3 conduction, nke mbụ MOSFETQ4 ọnụ ụzọ ámá capacitance site na drain resistor R3, transistor mbupu Q2 nke mbu maka mwepu, nke abuo MOSFETQ5 uzo isi iyi ikike site na drain resistor R4, transistor nke abuo Q3 maka igbapu, nke abụọ MOSFETQ5 ọnụ ụzọ ámá capacitance site na drain resistor R4, nke abụọ drain transistor Q3 maka mwepu, nke abụọ MOSFETQ5 ọnụ ụzọ ámá capacitance site na drain resistor R4, nke abụọ transistor transistor Q3 maka ihapu. A na-ewepụ ikike nke ọnụ ụzọ MOSFETQ5 nke abụọ site na drain resistor R4 na transistor nke abụọ nke Q3, nke mere MOSFET Q4 nke mbụ na MOSFET Q5 nke abụọ nwere ike gbanyụọ ngwa ngwa ma nwee ike belata ọnwụ ike.

Mgbe mgbaàmà PWM dị ala, sekit ntọhapụ ike echekwara nke mejupụtara resistor R5, capacitor Cl na diode D3 na-ahapụ ike echekwara na pulse transformer mgbe PWM dị elu, na-ahụ na ọnụ ụzọ ámá nke MOSFET Q4 mbụ na MOSFET nke abụọ. Q5 dị oke ala, nke na-eje ozi ebumnuche mgbochi nnyonye anya. Diode Dl na diode D2 na-eduzi mmepụta ugbu a n'otu n'otu, si otú a na-ahụ na ịdịmma nke PWM waveform, ma n'otu oge ahụ, ọ na-arụkwa ọrụ nke mgbochi nnyonye anya ruo n'ókè ụfọdụ.