Improved current-doubling rectifying circuit

Abstract

The invention relates to an improved current-doubling rectifying circuit, and relates to the technical field of power electronics, so that larger output current and smaller output voltage ripples canbe provided. The traditional current-doubling rectifying circuit has the following disadvantages that two output inductors are needed, the size is large, the mass is large, and the heights of two filtering inductors cannot be ensured, so that the currents flowing through two electric reactors are different to cause generation of magnetic biasing; and the development of the current-doubling rectifying circuit is hindered to a certain extent due to the abovementioned shortcomings. According to the invention, a traditional current-doubling circuit is improved, a magnetic inductor L3 is additionally arranged at the direct current end; two hollow windings are used by L2 and L1; and the total volume and the mass of the inductors are greatly reduced in an actual circuit, and the space is saved. Due to the fact that the inductance of the L1 and the inductance of the L2 are small, the inductance difference is very small in the manufacturing process, the differences of the passing-through currents are also very small, so that the problem of magnetic bias caused by the difference between the two electric reactors is solved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a rectifier circuit. Background technique [0002] With the development of power electronics technology, rectifier circuits have been invented, which can convert alternating current into direct current, and are widely used. With the rapid development of switching power supply technology, communication power supplies require larger output current and smaller output voltage ripple, so current doubler rectification circuits are often used. However, the traditional current doubler rectifier circuit has the following disadvantages: two output inductors are required, which are large in size and high in quality; the height of the two filter inductors cannot be guaranteed to be consistent, so there will be differences in the current flowing through them, resulting in bias magnetization; The disadvantages have hindered the development of the current doubler rectifier circuit to...

AI Technical Summary

Problems solved by technology

However, the traditional current doubler rectifier circuit has the following disadvantages: two output inductors are required, which are large in size and high in quality; the height of the two filter inductors cannot be guaranteed to be consistent, so there will be differences in the current flowing through them, resulting in bias magnetization; The disadvantages have hindered the development of the current doubler rectifier circuit to a certain extent.

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