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The working principle of the rectifier transformer

In the chemical industry with the most rectification, high-power rectifiers also have low secondary voltages and large currents, so they are similar in many respects to electric furnaces, ie the structural features described above. Point, rectifier transformer is also available. The biggest characteristic of the rectifier transformer is that the secondary current is not sinusoidal. Because of the single-conduction characteristics of the subsequent rectifying components, the phase lines are no longer at the same time, the load current is flowing but the soft current is conductive, and the unidirectional pulsating current is changed by the filtering device. For DC power, the secondary voltage of the rectifier transformer, the current is not only related to the capacity connection group, such as the commonly used three-phase bridge rectifier circuit, the double-reverse balance circuit with the balanced reactor, for the same DC output voltage and current required. The secondary voltage and current of the rectifier transformer are different. Therefore, the parameter calculation of the rectifier transformer is based on the rectification circuit. The general parameter calculation is calculated from the secondary side to the primary side.
Because the rectifier winding current is non-sinusoidal with many higher harmonics, in order to reduce the harmonic pollution to the grid, in order to improve the power factor, the pulse wave number of the rectifier equipment must be increased, which can be moved The method of phase is solved. The purpose of phase shifting is to have a phase shift between the end-of-line voltages of the secondary windings of the rectifier transformer.
2019/06/03 13:39:40 57 click

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