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Buck-boost 12-pulse autotransformer rectifier

A technology of autotransformer and autotransformer, applied in transformer/inductor components, transformer/inductor coil/winding/connection, AC power input conversion to DC power output, etc., can solve the problem of non-adjustable and output voltage Problems such as high

Active Publication Date: 2016-04-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Description
  • Claims
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Problems solved by technology

The output voltage of the existing differential delta type 12-pulse autotransformer rectifier is relatively high and cannot be adjusted, which limits its application to a certain extent

Method used

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  • Buck-boost 12-pulse autotransformer rectifier
  • Buck-boost 12-pulse autotransformer rectifier
  • Buck-boost 12-pulse autotransformer rectifier

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Embodiment

[0038] Embodiment: a buck-boost type 12-pulse autotransformer rectifier, comprising a buck-boost type 12-pulse autotransformer, two sets of rectifier bridges (both the subsequent autotransformer rectifier and the rectifier bridge are three-phase) and two Balance reactor. The primary side of each phase has one winding (ab, bc, ca), and the secondary side of each phase has two windings (c2a″, b’b1, a2b″, c’c1, b2c″, a’a1), and the primary side is connected to the input three Phase voltage (U AN , U BN , U CN ), the secondary output two sets of three-phase voltage (U a′N , U b′N , U c′N , U a″N , U b″N , U c″N ), the output line voltage of the secondary side is synthesized by 4 original and secondary side vectors (such as ), the voltage ratio between the secondary side of the autotransformer and the primary side is K u =0.557~0.707, see the attached voltage vector diagram figure 1 . attached figure 2 It is the circuit diagram of the corresponding 12-pulse autotrans...

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Abstract

The invention discloses a buck-boost 12-pulse autotransformer rectifier. The rectifier comprises a buck-boost 12-pulse autotransformer, two rectifier bridges and two balancing reactors. Each phase of the buck-boost 12-pulse autotransformer is provided with three windings, wherein a primary side is provided with a winding with two middle taps, and a secondary side is provided with two windings; the windings of the primary and secondary sides are reasonably connected, and a turns ratio of the windings of the primary and secondary sides of the autotransformer is changed, namely, a voltage vector sum of the windings of the primary and secondary sides is changed, so that three-phase alternating-current voltage output of fixed amplitude and two-phase difference of 30 degrees can be realized; and the problem of non-adjustable output voltage of an existing differential triangular 12-pulse autotransformer rectifier is effectively solved. According to the rectifier, the wide-range adjustment of the output voltage of the autotransformer to the input voltage by 0.557-1.115 times is realized on the basis of ensuring the performance of the 12-pulse autotransformer rectifier.

Description

technical field [0001] The invention belongs to the field of electric energy conversion, and specifically refers to a buck-boost type 12-pulse autotransformer rectifier. Background technique [0002] Multi-pulse rectification technology can be divided into 12 pulses, 18 pulses, 24 pulses, 30 pulses, etc. according to the number of output voltage pulses, so that the grid side current becomes the corresponding number of pulses. The more pulses, the lower the corresponding AC side current THD value, but The more complex the transformer structure and the more rectifier bridge groups. At present, the most widely used in aviation is the 12-pulse transformer rectifier, which is small in size, light in weight, and mature in technology. The isolated multi-pulse transformer rectifier can achieve 28V DC output by rationally designing the transformation ratio of the primary and secondary windings of the transformer, and can meet the aviation harmonic requirements through passive filter...

Claims

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Application Information

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IPC IPC(8): H02M7/06H01F27/28
CPCH01F27/2828H02M7/068
Inventor 姜帆葛红娟杨光吴双陈舒文林怡
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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