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Level winding communicationelectricPrinciple of rectifier transformer;
The principle of rectifier transformer and common transformer is the same. Transformer is based on the principle of electromagnetic induction made of a converter AC voltage equipment. The transformer usually has two independent windings, the first winding and the secondary winding, and the two windings share an iron core.Transformer initialsourceAlternating current in the windingElectric currentThe magnetic potential is generated, so there is an alternating magnetic flux in the closed core. The primary and secondary windings cut the magnetic field line and induce the alternating current at the same frequency at the secondary. The turn ratio of the primary and secondary windings of the transformer is equal to the voltage ratio. For example, the primary winding of a transformer is440Turn, secondary is220Turn. The primary input voltage is220VIn the transformer, the second can be obtained110VOutput voltage. Some transformers can have multiple secondary windings and taps.This allows you to get multiple output voltages.
Characteristics of rectifier transformer;
Each arm of the rectifier turns in turn in one cycle, and the turn-on time is only one cycle. Therefore, the current waveform through the rectifier arm is not sine wave, but rather close to the interrupted rectangular wave;The current waveforms in the primary and secondary windings are also nonsinusoidal. The three phase bridge is shown in the diagramY/YCurrent waveform in connection method. The rectifier with thyristor, the lag angle is bigger, the greater the steepness of the current fluctuation, current harmonic components are also more and more, which will enable the eddy current loss increases. Since the conduction time of the secondary winding occupies only one part of the cycle, the utilization ratio of the rectifier transformer is reduced. Compared with the common transformer, the volume and weight of the rectifier transformer are larger under the same conditions.