1. The Vaqtinchalik nazorat xususiyatlari ning chiqishi voltaj ning oldingi kuchlanish ta'minoti nisbatan yaxshi.
In a oldinga o'tish kuchlanish ta'minoti, qachon birinchi bo'g'in of the transformer is excited by the DC voltaj, the secondar coil of the transformator ta'minlaydi kuchlanish chiqish uchun yuk 2c va amplituda ning amplitudasi ning chiqishi voltaj is asosan barqaror. At bu vaqtda, garchi chiqish kuchi o'zgarib turadi 2c amplituda amplituda ning chiqishi voltaj qoldiqlari asosan o'zgarmas, bu ko'rsatadi o'zgaruvchan nazorat xususiyatlari ning chiqishi voltaji voltaj ning o'zgarishi the forward switching power supply are nisbatan yaxshi. Faqat boshqaruv o'chirish off, bo'lganda kuchlanish chiqishi ikkala tomonidan ta'minlanadi ikkala energiya saqlash induktor va energiya saqlash konacitor at da bir xil vaqtda. Garchi chiqish voltaj ta'sirlangan bo'lsa bo'lsa yuk o'tkazuvchanligi 2c agar energiya saqlash konakcha hajmi nisbatan katta 2c yuk oqim the impact on the output voltage also very small.
2. The forward power supply has relatively strong load capacity.
Oldinga o'tish kuchlanish ta'minoti umuman tanlaydi bir hafta o'rtacha qiymat ning transformator chiqishi voltaj, va the energiya saqlash induktor beradi oqim chiqishi uchun yuklash davomida yuk uchun ta'minlaydi -o'chirish va o'chirish davrlari of of the control switch. Shuning, the load capacity of the forward switching power supply is nisbatan kuchli va the output voltage ripple bo'ladi kichik. Agar chiqish voltaj of the forward switching power supply require require to have a large adjustment rate, under normal yuk sharoitlari, the duty cycle of the control switch is is best selected to be around {%7 bb3}}}%5, yoki biroz katta dan katta 0.5. At bu vaqt, the duty cycle flowing through the energy storage filter inductor Current Current continuous current. qachon oqib o'tayotgan sekrin energi saqlash filtr induktor a a uzluksiz o'tkazuvchanligi, yuk hajmi nisbatan kuchli.
3. The voltage and current output characteristics of the forward power supply are better than of the flyback power supply.
When the duty cycle of the control switch is 0.5, the amplitude of the output voltage uo of the forward switching power supply is exactly equal to twice the average voltage Ua, and the maximum value Im of the current flowing through the filter energy storage inductor is also exactly the average current Io ( twice the output current). Therefore, the pulsation coefficient S of the voltage and current of the forward switching power supply is approximately equal to 2, and compared with the pulsation coefficient S of the voltage and current of the flyback switching power supply, it is almost twice as small, indicating that the forward switching power supply has The voltage and current output characteristics are much better than the flyback switching power supply.
4. The forward power supply uses a large energy storage filter inductor and a freewheeling diode more than the flyback power supply.
ning noqulayligi the forward power supply is is ning ulanadigan a katta energiya saqlash filtri induktori va a freewheeling diod dan ko'proq flyback quvvat ta'minot. The chiqish voltaj of the forward power supply is modulyatsiya bo'ladi bo'lgan burch cycle, 2c qaysi bundan ancha past bo'lgan 1 dan ancha past bo'lgan flyback kuch ta'minoti. Shuning uchun, the forward power supply require a relatively high error signal amplituda for regulating the duty cycle, and a relatively large gain and dynamic range of the error signal ampliflifier.
5. The forward power supply is relatively large.
tartibida to kamaytirish qo'zg'atuvchi oqim ning transformator va yaxshilanishi ish samaradorligi ning oldinga o'tish quvvati ta'minoti, the volt-sekund quvvati bo'ladi transformator umuman erishilgan nisbiy katta (bu katta (bu 2c the volt-second capacity is equal ga teng mahsulot of the the kirish puls voltage amplituda va the puls kengligi, bu erda tomonidan AQSH tomonidan namoyish etiladi). Va tartibida oldini olish to sqinlik to lash uchun hosil bo'lgan bo'lgan birlamchi coil of the transformer dan sindirish o'tish trubkasi, the forward switching power supply transformator bir ko'proq orqaga elektro motiv kuch yutish shamollatish shamollatish dan ko'ra pash o'tish kuchlanish ta'minot transformator. Shuning, ning hajmi transformator ning hajmi 1 ning oldinga o'tish kuchlanish ta'minoti dan katta bo'ladi bundan katta bo'ladi dan katta bo'ladi flyback o'tish quvvati ta'minlanadi.
6. The orqaga elektromotor kuch voltaj tomonidan hosil bo'lgan birlamchi coil of the transformer of the forward power supply is dan yuqori bo'ladi the back elektromoteratif kuch voltage tomonidan hosil bo'lgan flyback quvvat ta'minoti.
oldinga o'tish kuchlanish ta'minotining yana bir katta kamchiligi shunda bo'ladi qachon nazorat o'chirish o'chirilganda 2c orqa elektromotor kuch kuchlanish tomonidan hosil bo'lgan shkala uchun birlamchi coil ning yuqori bo'lishi 1 orqa elektromotordan yuqori bo'ladi kuch voltaj tomonidan hosil bo'lgan the flyback switching power supply. Chunki umuman qachon oldinga o'tish quvvati ta'minoti ishlayotganda 2c bo'lganda duty cycle of the control switch is at at at 7b{0}} 7d 7d 7d.. 5, while duty cycle of the flyback switching power supply control switch is relatively small.
7. The double-tube forward power supply be ishlatilishi mumkin holatlarda yuqori voltaj kirish va katta quvvat chiqishi.
As zamonaviy elektron uskunalar yuqori va yuqori talablar on o'lchamlari elektron komponentlar, dan oldingi katta o'tish kuchlanish ta'minoti to g iga to rsatkich to rsatkich to 2c moduli moduli 2c ning moduli quvvati ta'minoti 2c bo'ladi talab to davom to to oshirish samaradorligi, quvvat zichligi, va kamaytirish hajmi, so shunda hozir kichik kuch moduli quvvati ta'minot ta'minot Asosan, u a flyback switching power supply solution.
