24-pulse rectifier with double single-phase half-wave rectification circuits

Abstract

The invention discloses a 24-pulse rectifier with double single-phase half-wave rectification circuits, and belongs to the technical field of power electronic technologies. The invention aims to solve the problems of how to realize multiplication of the pulse wave number of the rectifier with low additional conduction loss and effectively suppress harmonic waves generated by the rectifier while improving the symmetry and consistency of the winding structure of the phase-shifting transformer. Comprising a first group of single-phase transformers, a second group of single-phase transformers, a first group of three-phase full-bridge rectification circuits, a second group of three-phase full-bridge rectification circuits, a balance reactor with double secondary windings, a diode D1, a diode D2, a capacitor C1 and a capacitor C2, wherein the two secondary windings of the balancing reactor with the double secondary windings, the diode D1 and the diode D2 form a double-single-phase half-wave rectifying circuit; and the balance reactor with the double secondary side windings, the diode D1, the diode D2, the capacitor C1 and the capacitor C2 form an auxiliary pulse wave multiplication circuit. The rectifier is mainly used for rectification.

Description

technical field [0001] The invention belongs to the technical field of power electronics technology. Background technique [0002] With the rapid development of society, the capacity of industrial electrical equipment continues to increase. The 12-pulse rectifier has the advantages of simple circuit structure, low cost, high reliability, and low EMI. It is often used as an interface circuit between high-power electrical equipment and the power grid for frequency conversion, urban rail power supply, electrolytic plating, and ship electric propulsion. and other fields. However, the strong nonlinearity of the rectifier will cause it to inject more harmonics into the grid, and when used alone, it often cannot meet the requirements of harmonic standards such as IEEE519 and IEC. In addition, due to the difference in the connection mode of the secondary winding of the phase-shifting transformer, the consistency of the winding parameters is poor, so that the input current of the r...

AI Technical Summary

Problems solved by technology

This method has the advantages of simple circuit structure, high reliability, and easy implementation, but the diode on the tap is connected in series with the load path, which will cause a large conduction loss, and is not easy to apply to low-voltage and high-power applications.

Images