Transfòmatè redresman se transfòmatè pouvwa a nan ekipman redresman. Karakteristik nan ekipman redresman se ke pati orijinal la antre AC, pandan y ap pati a oksilyè pwodiksyon DC apre rektifye orijinal la. Konvètè se non jeneral redresman, kontrekouran ak konvèsyon frekans. Redresman se youn ki pi lajman itilize. Transfòmatè a itilize kòm ekipman pou pouvwa a nan redresman yo rele transfòmatè redresman. Pifò redresman endistriyèl DC ekipman pou pouvwa yo jwenn nan kadriyaj pouvwa AC atravè transfòmatè redresman ak ekipman redresman.
Transfòmatè redresman se transfòmatè pouvwa a nan ekipman redresman. Karakteristik nan ekipman redresman se ke bò prensipal la antre AC, pandan y ap bò segondè pwodiksyon DC apre yo fin pase nan eleman redresman an. Transfòmatè a itilize kòm ekipman pou pouvwa a nan redresman yo rele transfòmatè redresman. Pifò redresman endistriyèl DC ekipman pou pouvwa yo jwenn nan kadriyaj pouvwa AC atravè transfòmatè redresman ak ekipman redresman. Transfòmatè redresman se yon transfòmatè ki itilize espesyalman pou sistèm redresman.
Fonksyon konvètisè redresman:
1. Bay bon vòltaj nan sistèm redresman an;
2. Pou diminye polisyon nan griy pouvwa ki te koze pa distòsyon ond ki te koze pa sistèm redresman.
Karakteristik transfòmatè redresman
Yon transfòmatè ki fòme ekipman redresman ak redresman pou jwenn pouvwa DC nan ekipman pou pouvwa AC. Ekipman redresman se ekipman pou pouvwa DC ki pi souvan itilize nan antrepriz endistriyèl modèn. Li se lajman ki itilize nan transmisyon DC, traction elektrik, woule asye, electroplating, elektwoliz ak lòt jaden.
Se bò prensipal la nan transfòmatè a redresman ki konekte ak sistèm nan pouvwa AC, ki rele bò kadriyaj la; Se bò segondè ki konekte ak redresman an, ki rele bò valv la. Prensip estriktirèl transfòmatè redresman an se menm jan ak transfòmatè òdinè, men redresman chaj li yo gen karakteristik sa yo paske li diferan de chaj jeneral:
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.