Rektifikator transformatori rektifikator uskunasining quvvat transformatoridir. Rektifikator uskunasining o'ziga xos xususiyati shundaki, dastlabki tomon o'zgaruvchan tokni kiritadi, yordamchi tomon esa aslni to'g'rilagandan so'ng DCni chiqaradi. Konverter - rektifikator, qarshi oqim va chastota konvertatsiyasining umumiy nomi. Rektifikator eng keng tarqalgan hisoblanadi. Rektifikatorning quvvat manbai sifatida ishlatiladigan transformator rektifikator transformatori deb ataladi. Ko'pgina sanoat rektifikator shahar quvvat manbalari AC elektr tarmog'idan rektifikator transformator va rektifikator uskunalari orqali olinadi.
Rektifikator transformatori rektifikator uskunasining quvvat transformatoridir. Rektifikator uskunasining xarakteristikasi shundaki, birlamchi tomon o'zgaruvchan tokni kiritadi, ikkilamchi tomon esa rektifikator elementidan o'tgandan so'ng doimiy oqimni chiqaradi. Rektifikatorning quvvat manbai sifatida ishlatiladigan transformator rektifikator transformatori deb ataladi. Ko'pgina sanoat rektifikator shahar quvvat manbalari AC elektr tarmog'idan rektifikator transformator va rektifikator uskunalari orqali olinadi. Rektifikator transformatori rektifikator tizimi uchun maxsus ishlatiladigan transformatordir.
Rektifikator konvertor funktsiyasi:
1. Rektifikator tizimiga to'g'ri kuchlanishni etkazib berish;
2. Rektifikator tizimidan kelib chiqqan to'lqin shakli buzilishidan kelib chiqqan elektr tarmog'ining ifloslanishini kamaytirish.
Rektifikator transformatorining xarakteristikalari
AC quvvat manbaidan doimiy quvvat olish uchun rektifikator bilan rektifikator uskunasini tashkil etuvchi transformator. Rektifikator uskunalari zamonaviy sanoat korxonalarida eng ko'p qo'llaniladigan DC quvvat manbai hisoblanadi. U DC uzatish, elektr tortish, po'lat prokat, elektrokaplama, elektroliz va boshqa sohalarda keng qo'llaniladi.
Rektifikator transformatorining asosiy tomoni tarmoq tomoni deb ataladigan AC quvvat tizimiga ulangan; Ikkilamchi tomon rektifikatorga ulanadi, u vana tomoni deb ataladi. Rektifikator transformatorining strukturaviy printsipi oddiy transformatornikiga o'xshaydi, lekin uning yuk rektifikatori quyidagi xususiyatlarga ega, chunki u umumiy yukdan farq qiladi:
① Each arm of the rectifier turns on in a cycle, and the conduction time only accounts for a part of a cycle. Therefore, the current waveform flowing through the rectifier arm is not a sine wave, but close to an intermittent rectangular wave; The current waveforms in the primary and secondary windings are also non sine waves. The figure shows the current waveform of three-phase bridge Y / Y connection. When rectifying with thyristor, the greater the lag angle, the steeper the current fluctuation and the more harmonic components in the current, which will increase the eddy current loss. Since the conduction time of the secondary winding only accounts for a part of a cycle, the utilization rate of the rectifier transformer is reduced. Compared with ordinary transformer, the rectifier transformer has larger volume and weight under the same conditions.
② The power of the primary and secondary sides of an ordinary transformer is equal (ignoring loss), and the capacity of the transformer is the capacity of the primary winding (or secondary winding). However, for the rectifier transformer, the power of the primary and secondary windings may be equal or unequal (when the current waveforms of the primary and secondary sides are different, such as half wave rectifier), so the capacity of the rectifier transformer is the average of the apparent power of the primary and secondary sides, which is called equivalent capacity, that is, S1 is the apparent power of the primary side and S2 is the apparent power of the secondary side.
③ Compared with ordinary transformer, the ability of rectifier transformer to withstand short-circuit electrodynamic force must strictly meet the requirements. Therefore, how to make the product have short-circuit dynamic stability is an important topic in design and manufacturing.