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An isolated step-down 30 pulse transformer rectifier

A pulse transformation, isolation and step-down technology, which is applied in the direction of converting AC power input into DC power output, irreversible AC power input into DC power output, and output power conversion devices, etc., to achieve the effect of low harmonic content.

Inactive Publication Date: 2018-12-21
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of isolated step-down type 30-pulse transformer rectifier, to solve at least one problem that existing 30-pulse transformer rectifier exists

Method used

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  • An isolated step-down 30 pulse transformer rectifier
  • An isolated step-down 30 pulse transformer rectifier
  • An isolated step-down 30 pulse transformer rectifier

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Embodiment Construction

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detai...

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Abstract

The invention relates to the field of electric energy conversion, in particular to an isolated step-down 30-pulse transformer rectifier. The isolated step-down 30-pulse transformer rectifier includes30-pulse phase-shifting transformer and 5 groups of three-phase rectifier bridges. The 30 pulse phase shift transformer comprise A phase, B phase and C phase, and five groups of three-phase rectifierbridges are respectively a main bridge, a first auxiliary bridge, a second auxiliary bridge, a third auxiliary bridge and a fourth auxiliary bridge; The Phase A, the Phase B and the Phase C consist ofone primary winding ao and nine secondary windings. The A-phase input voltage source is connected with the primary head terminal a, and the terminal thereof is connected with the B-phase and C-phaseprimary ends; In addition, the winding structure and connection mode of Phase B and Phase C are consistent with that of Phase A; The turn ratios of the windings of Phase A, Phase B and Phase C satisfya predetermined relationship. The isolated step-down 30-pulse transformer rectifier of the present invention does not require a subsequent cascade DC-DC buck circuit, can achieve a wide range of output voltage buck regulation, for the aviation system to provide high efficiency, high reliability, isolation of low-voltage DC power supply.

Description

technical field [0001] The invention relates to the field of electric energy conversion, in particular to an isolated step-down 30-pulse transformer rectifier. Background technique [0002] For aviation power supply system input three-phase 115V / 400Hz, input current THD requirements to meet GJB181's requirements for input current harmonics ≤ 10%, output low-voltage isolated DC power supply, the following two existing technical solutions can be used: [0003] Active power factor correction + DC-DC conversion circuit, but this solution has many components, complex circuits, low reliability, low efficiency, and high cost; [0004] Multi-pulse rectification + DC-DC conversion circuit, this technology can be divided into 12 pulses, 18 pulses, 24 pulses, 30 pulses, etc. according to the number of output voltage pulses. The more pulses, the lower the harmonic content of the input current, 12 pulses, 18 The theoretical values ​​of pulse input current THD are 15% and 10.11%, which d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/06H02M1/12
CPCH02M1/12H02M7/068
Inventor 王冬梅邹晓渔金鑫
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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