Magnetic integration device and power conversion circuit
A technology of integrated device and magnetic integration, applied in the circuit field of heating power supply in nuclear power plants, can solve the problems of excessive size and weight of heating power supply circuit
Active Publication Date: 2018-10-12
CHINA GENERAL NUCLEAR POWER OPERATION +2
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- Application Information
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Problems solved by technology
[0004] Based on this, it is necessary to provide a magnetic integrated device and a power conversion circuit for the problem of excessive volume and weight of the heating power circuit
Method used
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[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0029] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intervening elements at the same time. The terms "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonl...
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The invention relates to a magnetic integration device for realizing magnetic integration of a three-phase transformer and a three-phase LCL filter in a three-phase circuit, the three-phase LCL filtercomprising three first inductors close to the three-phase transformer and three second inductors away from the three-phase transformer. The magnetic integration device is characterized by comprisingmagnetic core bases parallel to each other, and a common magnetic column and at least two coupled magnetic columns between the magnetic core bases; any coupled magnetic column is used for winding anypair of primary and secondary coils of the three-phase transformer or winding coils of at least two first inductors; the coupled magnetic columns are provided with air gaps, while the common magneticcolumn is not provided with any air gap. By integrating part of or all of coils of the three-phase transformer and the three-phase LCL filter from the magnetic structure and setting the common magnetic column, the integrated total flux flows to the common magnetic column. Therefore, three-phase imbalance caused by imbalance of single phases is avoided while the size and weight of the three-phase circuit are reduced.
Description
technical field [0001] The invention relates to the circuit field of a heating power supply of a nuclear power plant, in particular to a magnetic integrated device and a power conversion circuit. Background technique [0002] Due to manufacturing process problems of large motors, some end wire rods may be too close. After a long time of operation, the motor wire rod windings will be worn due to vibration and friction, and yellow powder will appear. Further development of the wear degree may cause damage to the motor insulation and cause the motor to burn out. Wait for a serious failure. At present, a large motor rod heating power supply can be used to provide low voltage and high current to heat the motor rod, and the expansion rod can be filled with suitable materials to form isolation and avoid wear and tear to produce yellow powder. The overall scheme of the heating power supply circuit for large motor rods is as follows: figure 1 As shown, the three-phase 380V AC power...
Claims
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IPC IPC(8): H01F30/12H01F27/24H01F27/30H01F27/08H02M7/217H02M7/23H02M7/219
Inventor 刘志强李烁杨树林张伟吴晓东
Owner CHINA GENERAL NUCLEAR POWER OPERATION