Compact multi-pulse rectifier based on dual-switch power electronic phase-shifting transformer
A phase-shifting transformer and multi-pulse rectification technology, applied in the field of power electronics, can solve the problems of large volume/weight of isolated phase-shifting transformers
Active Publication Date: 2021-11-05
HARBIN ENG UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problem of large volume / weight of the existing isolated phase-shifting transformer, multiply the pulse number of the rectifier in a simple way, effectively suppress the input current harmonics, and realize the continuous adjustment of the output voltage of the rectifier, The invention provides a simplified multi-pulse rectifier based on a double-switch power electronic phase-shifting transformer
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[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0054] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0055] see figure 1 and image 3 Describe this embodiment, the simplified multi-pulse rectifier based on the dual-switch power electronic phase-shifting transformer described in this embodiment includes the first group of rectifier bridges 1 with clamping circuits, the second group of rectifier ...
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A simplified multi-pulse rectifier based on a double-switch power electronic phase-shifting transformer belongs to the technical field of power electronics. While solving the problem of large volume / weight of the existing isolated phase-shifting transformer, the pulse number of the rectifier is multiplied in a simple manner, the harmonics of the input current are effectively suppressed, and the continuous adjustment of the output voltage of the rectifier is realized. Including the first group of rectifier bridges with clamp circuits, the second group of rectifier bridges with clamp circuits, phase-shifting transformers, the first group of three-phase rectifier bridges, the second group of three-phase rectifier bridges, and the balanced reactance with secondary windings rectifier, single-phase rectifier circuit, post-stage filter circuit and control circuit; the turns ratio of the primary winding and the secondary winding of the balanced reactor with the secondary winding is 0.246, at this time, the balanced reactor with the secondary winding and the single-phase winding The rectifier circuit constitutes a pulse-multiplying balanced reactor to realize the pulse-number multiplication of the rectifier. The invention is mainly used for converting three-phase alternating current into direct current.
Description
technical field [0001] The invention belongs to the technical field of power electronics. Background technique [0002] The 12-pulse rectifier has the advantages of simple structure, high reliability, low cost, and low EMI. It is often used in high-power industrial occasions such as urban rail power supply, electrolytic plating, metal smelting, and ship shore power. Although the 12-pulse rectifier can eliminate the 5th, 7th, 17th and 19th harmonics in the input line current, the THD of the input current is still high, and often cannot meet the harmonic standards such as IEEE-519 and IEC-16. Due to the limitation of the structure of the conventional 12-pulse rectifier, the output voltage cannot be adjusted, which limits the further application of the 12-pulse rectifier. In addition, the existing conventional phase-shifting transformers work in the power frequency state. The volume and weight of the phase-shifting transformers are large, and they need to occupy a large instal...
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IPC IPC(8): H02M7/08H02M1/12
CPCH02M1/126H02M7/08
Inventor 王景芳陈安臣姚绪梁刘瑜超张国望吕雨生
Owner HARBIN ENG UNIV