A linear phase-shifting transformer with ring winding, its control method and its application

A technology of phase-shifting transformers and ring windings, applied in the field of transformers, can solve the problems of circular phase-shifting transformers being inconvenient to expand, defects that cannot be fundamentally solved, and the volume and weight of transformers increasing, so as to reduce the difficulty of embedded wires, simple structure, Effect of reducing winding loss

Active Publication Date: 2022-03-01
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The isolation transformer can effectively realize electrical isolation and has high reliability, but the energy transfer of the primary and secondary sides is completely realized through magnetic coupling, resulting in a large equivalent capacity and a large transformer volume
[0007] The commonly used auto-type phase-shifting transformers are T-shaped, star-shaped, polygonal and zig-zag windings. The efficiency and manufacturing process of the transformer are improved compared with the isolated phase-shifting transformer. The disadvantage is that it cannot achieve electrical isolation.
When the power is large or the number of phases is large, the volume and weight of the transformer will increase dramatically, the utilization rate of the iron core will be low, and the winding structure will be very complicated, resulting in difficult processing
[0012] (2) The structure of the existing circular phase-shifting transformer is complicated, and the manufacturing of the iron core and the winding of the coil winding are relatively complicated. At the same time, the circular phase-shifting transformer is not easy to expand, and the air gap magnetic field is difficult to control
[0013] (3) The existing linear transformer is a long-short-pitch linear phase-shifting transformer. The primary and secondary sides are symmetrical structures, and the primary and secondary sides use double-layer stacked windings. This type of structure is difficult to insert wires, the number of turns is limited, and the end leakage reactance bigger
[0015] The above-mentioned defects of the existing four phase-shifting transformers are all determined by the structural properties, and the corresponding defects cannot be fundamentally solved

Method used

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  • A linear phase-shifting transformer with ring winding, its control method and its application
  • A linear phase-shifting transformer with ring winding, its control method and its application
  • A linear phase-shifting transformer with ring winding, its control method and its application

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Embodiment 1

[0117] The linear phase-shifting transformer provided by the embodiment of the present invention is applied to a 12 / 3-phase multiple superposition inverter system, such as Figure 10 As shown, the multiple stacked inverter system consists of a control circuit, an inverter circuit, a phase-shifting transformer and a load.

[0118] The control circuit is composed of 24 control signals, respectively controlling 24 IGBTs in four groups of three-phase inverter circuits. In the same group of inverters, the conduction signals of the switch tubes of the same bridge arm differ from each other by 180 electrical degrees, and the conduction signals corresponding to different bridge arms differ from each other by 120 electrical degrees. The corresponding switch tube conduction signals in each group of inverters followed by a lag of 15 electrical degrees. The inverter circuit is composed of 4 groups of three-phase half-bridge inverters, and each group of inverters is composed of 6 IGBT swi...

Embodiment 2

[0126] Embodiment 2: The linear phase-shifting transformer provided by the embodiment of the present invention is applied to a 3 / 12-phase multiple superposition rectification system, such as Figure 24 As shown, the multiple superposition rectification system consists of three-phase power supply, phase-shifting transformer, rectification circuit and load. The three-phase power supply is connected to the three-phase side of the primary side. The twelve-phase side of the secondary side can obtain twelve-phase power with a mutual difference of 15°, and obtain DC power after rectification and filtering.

[0127] The present invention will be further described below in combination with simulation analysis.

[0128] simulation

[0129]See Figure 25 and Figure 26 shown.

[0130] The voltage of the twelve windings on the secondary side is as follows Figure 27 and Figure 28 shown.

[0131] The current in the twelve windings of the secondary side is as follows Figure 29 wi...

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Abstract

The invention belongs to the technical field of transformers, and discloses a linear phase-shifting transformer with a ring winding, a control method and an application thereof. The primary and secondary sides adopt a symmetrical structure and are fixed; the winding on the iron core adopts a ring winding; After the internal connection, lead out the other winding terminal and connect it to the terminal block. After the terminal block is fixed on the junction box, the junction box is fixed outside the transformer protective cover. When the invention is applied to rectification, after the three-phase alternating current is connected to the primary side, a traveling wave magnetic field is formed in the air gap, and an induced potential is generated on the secondary side. Since the number of turns of the windings on the same side is the same and distributed on a straight line, it has a better phase shifting function Theoretically, phase shifting at any angle can be realized according to requirements; when the present invention is applied to inverter, the primary side is connected to the 3×n phase pulse wave output by the three-phase bridge inverter system, and the secondary side outputs three-phase alternating current. The invention has simple wire embedding, reduces end leakage reactance, greatly simplifies the structure of the phase-shifting transformer, and is easy to be modularized.

Description

technical field [0001] The invention belongs to the technical field of transformers, and in particular relates to a linear phase-shifting transformer with ring windings, a control method and an application thereof. Background technique [0002] At present, in the power system, the public grid provides electric energy with a fixed frequency and voltage, but various electrical equipment have different requirements for the power supply. After a reasonable transformation of the electric energy provided by the grid, it will be used by the load, which will make the load Work in the best condition to achieve better economic benefits. The function of power conversion is to transform the electric energy provided by the grid into a power supply that meets the requirements of various electrical equipment. At the same time, the proportion of the amount of electricity used after power conversion to the total power generation has become an important factor to measure the country's econom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F30/12H01F30/16H01F27/02H01F27/06H01F27/24H01F27/26H01F27/29H01F27/30H02M5/14H02M1/44
CPCH01F30/12H01F30/16H01F27/06H01F27/02H01F27/24H01F27/266H01F27/306H01F27/29H02M5/14H02M1/44
Inventor 赵镜红郭国强许浩熊义勇吴媚
Owner NAVAL UNIV OF ENG PLA
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