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Transformer and power converter having same

A transformer and winding technology, applied in the direction of transformer/inductor core, transformer, transformer/inductor components, etc., can solve the problems of increasing the excitation current and increasing the transformer gap, and achieve the effect of suppressing abnormal heating

Active Publication Date: 2020-07-24
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the excitation current, it is necessary to reduce the excitation inductance of the transformer, and there is a tendency for the gap of the transformer to increase

Method used

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  • Transformer and power converter having same
  • Transformer and power converter having same
  • Transformer and power converter having same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043] 1.1 General structure

[0044] figure 1 It is a sectional view showing the general structure of the transformer 1 according to the first embodiment of the present invention. figure 2 It is a sectional view showing details of the winding portion 30 of the transformer 1 .

[0045] Such as figure 1 As shown, the transformer 1 has: an iron core 10, which forms a magnetic circuit, and is provided with a gap 11 at the middle leg 10b; a winding frame (winding frame) 20, which is installed on the middle leg 10b of the iron core 10; and The winding part 30 is wound on the bobbin 20 in multiple layers.

[0046] The iron core 10 has a middle foot 10b and two outer feet 10a, 10c branched from the middle foot 10b (respectively called the left foot 10a, the right foot 10c to distinguish if necessary), wherein the middle foot 10b A gap 11 is provided. The gap 11 is provided to prevent magnetic saturation of the iron core 10 or to adjust the excitation inductance of the transform...

no. 2 approach

[0071] Figure 9 It is a sectional view illustrating the electrical connection between the layers of the first winding 31 and the second winding 32 of the transformer 1A according to the second embodiment of the present invention. In addition, the same reference numerals are assigned to the same components as those of the first embodiment, and the following description will mainly be made on the points of difference.

[0072] Such as Figure 9 As shown, in the transformer 1A, the layer 31a and the layer 31b of the first winding 31 are connected in series, and the layer 31b and the layer 31c are connected in parallel. That is, a specific layer (here, layer 31b) of the first winding 31 is connected in series to each layer (here, only layer 31a) on the inside (the side closer to the gap 11 ) than it, and the specific layer (here, layer 31b) Each layer (here, only the layer 31c ) on the outer side (the side farther from the gap 11 ) is connected in parallel.

[0073] Each layer...

no. 3 approach

[0076] Figure 10 It is a sectional view showing the general structure of the transformer 1B and the electrical connection between the layers of the first winding 31 and the second winding 32 according to the third embodiment of the present invention. In addition, the same reference numerals are attached to the same components as those of the first embodiment and the second embodiment, and the differences will be mainly described below.

[0077] When connecting the windings in series, a method may be considered in which separate windings are wound on each layer and the ends thereof are connected in series by welding or the like. However, in this case, man-hours for connection work are required.

[0078] Therefore, as a structure for holding the connecting wires for connecting the respective layers in series, the winding frame 20 is provided with connecting wire holding portions 21 . For example, it is also possible to dig out such a groove in the reel 20 that the connecting w...

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Abstract

A transformer (1) includes: an iron core (10) forming a magnetic circuit, at least a part of which is provided with a gap (11); a bobbin (20) mounted on the iron core (10); a first winding (31 ), which is wound in more than two layers, and the two or more layers include the layer (31a) wound on the side closest to the gap (11) of the bobbin (20) and the layer (31a) wound on the The layer (31a) of the layer (31b) on the far side from the gap (11); and the second winding (32) comprising the layer (31a) and the layer (31b) wound on the side of the first winding (31) ) between the layers (32a) of the second winding (32) side are insulated from the first winding (31), and the layer (31a) and layer (31b) of the first winding (31) are connected in series.

Description

technical field [0001] The present invention relates to a transformer and a power converter including the transformer, and more particularly to a transformer having a winding structure suitable for a power converter such as an isolated converter, and a power converter including the transformer. Background technique [0002] As a high-efficiency isolated type converter, an LLC (Logic Link Control) current resonant converter is actually used. In recent years, LLCs have been used in converters that require a wide range of voltage fluctuations, such as solar power conditioners. In this case, in order to cope with a wide input and output voltage range, the excitation current of the LLC needs to be designed to be large. In order to increase the exciting current, it is necessary to reduce the exciting inductance of the transformer, and the gap of the transformer tends to increase. [0003] In addition, a transformer has been proposed that has low leakage inductance, suppresses th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F30/10H01F27/28
CPCH01F30/10H01F5/02H01F27/325H01F3/14H01F2027/348H01F27/34H01F27/2823H02M3/28H01F27/28H01F27/24
Inventor 西川武男横井都司如俵木隆圭
Owner ORMON CORP
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