What are the use and application fields of rectifier transformers
The use of rectifier transformers in the electrochemical industry, which is an industry that uses more rectifiers, electrolysis of non-ferrous metal compounds to produce aluminum, magnesium, copper and other metals; electrolysis of salt to produce chlor-alkali; electrolysis of water to produce hydrogen and oxygen. High-power rectifier equipment also has low secondary voltage and large current, so they are similar to electric furnace transformers in many aspects, that is, the structural feature points mentioned above, rectifier transformers also have the same.
The biggest feature of the rectifier transformer is that the secondary current is not sinusoidal AC. Due to the unidirectional conduction characteristics of the subsequent rectifier elements, the phase lines are no longer together, and the load current flows instead of soft current conduction. The unidirectional pulsating current is changed by the filter equipment. For direct current, the secondary voltage and current of the rectifier transformer are not only related to the capacity connection group, such as the commonly used 3-phase bridge rectifier circuit, double inverse rectifier circuit with balanced reactor, for the same DC output voltage, the current required The secondary voltage and current of the rectifier transformer are different, so the parameter calculation of the rectifier transformer is based on the rectifier circuit, and the general parameter calculation is calculated from the secondary side to the primary side.
Since the rectifier transformer winding current is non-sinusoidal and contains many high-order harmonics, in order to reduce the harmonic pollution to the power grid and improve the power factor, it is necessary to increase the pulse number of the rectifier equipment, which can be handled by phase shifting. The purpose of the phase is to have a phase shift between the line voltages of the same-named terminals of the secondary windings of the rectifier transformer.
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