CN118588417A - Integrated structure of magnetic components for interleaved resonant circuit architecture - Google Patents

Abstract

A magnetic element integrated structure for an interleaved resonant circuit architecture is composed of a central magnetic column and four magnetic elements, wherein each magnetic element has a winding column and a coil, and the coil is wound on the winding column. The two magnetic elements located on both sides of the central magnetic column form two transformers, and the other two magnetic elements are located on one side of the magnetic element adjacent to the central magnetic column, and form two resonant inductors. The magnetic flux between the two transformers and between the adjacent resonant inductors and the transformer can offset each other, thereby improving the overall efficiency.

Description

Integrated structure of magnetic components for interleaved resonant circuit architecture

Technical Field

The present invention relates to a magnetic component integrated structure for an interleaved resonant circuit architecture, and in particular to a structure that forms two transformers and two resonant inductors through a combination of multiple magnetic components, saves on the use of magnetic columns through adjacency, and cancels out magnetic fluxes to improve overall efficiency.

Background Art

The switching frequency of general switching power supplies is constantly increasing, which leads to higher switching losses. In order to reduce the power dissipation caused by switching losses, voltage/current resonance technology is relatively important, so the series resonant converter has its application value.

The following describes two types of half-bridge series resonant circuits: SRC and LLC. The SRC series resonant circuit architecture consists of a series resonant network consisting of a resonant inductor Lr, a resonant capacitor Cr, and a load reflected from the secondary side of the transformer. When the switching frequency is changed, the equivalent impedance of the resonant tank changes accordingly. Since the load is connected in series with the resonant inductor and the resonant capacitor, the output voltage and the input voltage are in a voltage-dividing relationship, and the voltage gain must be less than 1. When the switching frequency is exactly equal to the resonant frequency, the Lr and Cr impedances will cancel each other out, and the input voltage will completely span the load.

The LLC series resonant circuit architecture consists of a resonant network composed of a resonant inductor Lr, a resonant capacitor Cr, a magnetizing inductor Lm and a load reflected from the secondary side of the transformer. When the switching frequency is changed, the equivalent impedance of the resonant tank changes accordingly. Since the load is connected in series with the resonant inductor and the resonant capacitor, the output voltage and the input voltage are in a voltage-dividing relationship, and the voltage gain must be less than 1. When the switching frequency is exactly equal to the resonant frequency, the impedances of Lr and Cr will cancel each other out, and most of the input voltage will be across the load.

Regardless of whether it is a resonant inductor or a transformer, although they are all magnetic components, they are generally independent components. Therefore, the more magnetic components there are, the more space they occupy. If the characteristics of the magnetic components can be used to share adjacent magnetic components, the use and cost of the magnetic components can be reduced, and the phase difference of 90 degrees can be used to offset the magnetic flux to improve the overall efficiency, therefore, this case should be the best solution.

Summary of the invention

The object of the present invention is to provide a magnetic component integrated structure for an interleaved resonant circuit architecture, which has a simple structure and is easy to operate, can overcome the defects of the prior art, and improve the overall efficiency.

To achieve the above object, the present invention discloses a magnetic element integrated structure for an interleaved resonant circuit architecture, which is characterized by comprising:

a central magnetic column;

A first magnetic element, comprising a first magnetic core body, a first winding post and a first coil, wherein the first winding post is adjacent to one side of the central magnetic post, and the first coil is wound on the first winding post, wherein the central magnetic post and the first magnetic element form a first transformer assembly;

A second magnetic element, comprising a second magnetic core body, a second winding post and a second coil, wherein the second winding post is adjacent to the other side of the central magnetic post, and the second coil is wound on the second winding post, wherein the central magnetic post and the second magnetic element form a second transformer assembly;

a third magnetic element, comprising a third magnetic core body, a third winding post and a third coil, wherein the third winding post is adjacent to one side of the first magnetic core body, and the third coil is wound on the third winding post, wherein the third magnetic element and the first magnetic core body form a first resonant inductor component; and

A fourth magnetic element has a fourth magnetic core body, a fourth winding post and a fourth coil, wherein the fourth winding post is adjacent to one side of the second magnetic core body, and the fourth coil is wound on the fourth winding post, wherein the fourth magnetic element and the second magnetic core body form a second resonant inductor component.

The magnetic flux of the first transformer component offsets the magnetic flux of the second transformer component.

The magnetic flux of the first resonant inductor component offsets the magnetic flux of the first transformer component.

The magnetic flux of the second resonant inductor component offsets the magnetic flux of the second transformer component.

Through the above structure, the present invention can achieve the following technical effects:

1. Through the characteristics of magnetic components, adjacent magnetic components are used as common components to reduce the use and cost of magnetic components, and through the characteristics of phase difference, the magnetic flux is offset to improve the overall efficiency.

2. It can save the use of multiple center columns, so that multiple magnetic components can be more flexible to adjust the space occupied by the circuit.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a schematic diagram of a magnetic element integrated structure for an interleaved resonant circuit architecture according to the present invention.

FIG. 1B is a schematic diagram of magnetic flux cancellation of the integrated structure of magnetic elements used in the interleaved resonant circuit architecture of the present invention.

FIG. 2A is a schematic diagram showing an implementation of a half-bridge circuit of a magnetic component integrated structure for an interleaved resonant circuit architecture according to the present invention.

FIG. 2B is a schematic diagram showing an implementation of a half-bridge circuit of a magnetic component integrated structure for an interleaved resonant circuit architecture according to the present invention.

FIG. 3 is a schematic diagram of the phase of a driving signal of a magnetic component integrated structure used in an interleaved resonant circuit architecture according to the present invention.

DETAILED DESCRIPTION

Other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings.

Please refer to Figure 1A, which is a schematic diagram of the structure of the magnetic element integrated structure used for the staggered resonant circuit architecture of the present invention. As shown in the figure, the magnetic element integrated structure is applied to the staggered resonant circuit architecture, and the magnetic element integrated structure includes a central magnetic column 1, a first magnetic element 2, a second magnetic element 3, a third magnetic element 4, and a fourth magnetic element 5.

The first magnetic element 2 is located at one side of the central magnetic column 1. The first magnetic element 2 has a first magnetic core body 20, a first winding column 21, a first side column 22 and a first coil 23. The first winding column 21 is located at one side of the central magnetic column 1. The first coil 23 is wound on the first winding column 21. The central magnetic column 1 and the first magnetic element 2 constitute a first transformer component.

The second magnetic element 3 is located on the other side of the central magnetic column 1. The second magnetic element 3 has a second magnetic core body 30, a second winding column 31, a second side column 32 and a second coil 33. The second winding column 31 is located on the other side of the central magnetic column 1. The second coil 33 is wound on the second winding column 31. The central magnetic column 1 and the second magnetic element 3 constitute a second transformer component.

The third magnetic element 4 is located on one side of the first magnetic element 2. The third magnetic element 4 has a third magnetic core body 40, a third winding post 41, a third side post 42 and a third coil 43. The third winding post 41 is adjacent to one side of the first magnetic core body 20. The third coil 43 is wound on the third winding post 41. The third magnetic element 4 and the first magnetic core body 20 form a first resonant inductor component.

The fourth magnetic element 5 is located on one side of the second magnetic element 3. The fourth magnetic element 5 has a fourth magnetic core body 50, a fourth winding post 51, a fourth side post 52 and a fourth coil 53. The fourth winding post 51 is adjacent to one side of the second magnetic core body 30. The fourth coil 53 is wound on the fourth winding post 51. The fourth magnetic element 5 and the second magnetic core body 30 form a second resonant inductor component.

Among them, in this embodiment, the height (H1) of the third magnetic element 4 and the fourth magnetic element 5 can be different from the height (H2) of the first magnetic element 2 and the second magnetic element 3, mainly because the third magnetic element 4 and the fourth magnetic element 5 are used as part of the inductor, while the first magnetic element 2 and the second magnetic element 3 are used as part of the transformer, wherein the winding lengths of the inductor and the transformer are different, so the designed H1/H2 heights are also different. The height mentioned in this case is equivalent to the length, and the height can be adjusted according to different needs (H1 and H2 will change the height due to different processing power and different winding wire diameters used to adjust the size of the winding window, so the H1/H2 height is flexibly adjusted).

Since the first transformer component and the first resonant inductor component share the first magnetic core body 20, the first transformer component and the second transformer component share the central magnetic column 1, and the second transformer component and the second resonant inductor component share the second magnetic core body 30, the design of this embodiment can save three central columns, so that multiple magnetic components can be more flexible to adjust the occupied space on the circuit.

As shown in FIG. 1B , the magnetic flux of the first transformer component cancels the magnetic flux of the second transformer component.

As shown in FIG. 1B , the magnetic flux of the first resonant inductor component cancels the magnetic flux of the first transformer component.

As shown in FIG. 1B , the magnetic flux of the second resonant inductor component cancels the magnetic flux of the second transformer component.

The interleaved resonant circuit structure is shown in the combination of Figure 2A and Figure 2B, wherein the first transformer component 61, the second transformer component 62, the first resonant inductor component 71 and the second resonant inductor component 72, as shown in Figure 1A, are respectively composed of the central magnetic column 1, the first magnetic element 2, the second magnetic element 3, the third magnetic element 4, and the fourth magnetic element 5.

2A and 2B are implemented using a half-bridge circuit as an example. However, if a high power application is required, the present invention can also be implemented using a full-bridge circuit.

As can be seen from FIG. 3 , the phase difference between the phase signals of PRDRVA and PRDRVB is 180 degrees, and the magnetic flux between the first resonant inductor component 71 and the first transformer component 61 (center column/common magnetic column) differs by 180 degrees (the potential phase difference between the first resonant inductor component 71 and the first transformer component 61 is 0 degrees), so the magnetic fluxes cancel each other out.

As can be seen from FIG. 3 , the phase difference between the phase signals of PRDRVC and PRDRVD is 180 degrees, and the magnetic flux between the second resonant inductor component 72 and the second transformer component 62 (center column/common magnetic column) differs by 180 degrees (the potential phase difference between the second resonant inductor component 72 and the second transformer component 62 is 0 degree), so the magnetic fluxes cancel each other out.

As can be seen from FIG. 3 , the phase difference between the phase signals of PRDRVB and PRDRVD is 90 degrees, and the magnetic flux between the first transformer component 61 and the second transformer component 62 (center column/common magnetic column) differs by 90 degrees (the potential phase difference between the first transformer component 61 and the second transformer component 62 is 90 degrees), so the magnetic fluxes cancel each other out.

The advantages of the magnetic component integrated structure for the interleaved resonant circuit architecture provided by the present invention compared with other conventional technologies are as follows:

1. The present invention can use the characteristics of magnetic elements to share adjacent magnetic elements to reduce the use and cost of magnetic elements, and can use the characteristics of phase difference to offset magnetic fluxes to improve overall efficiency.

2. The present invention can save the use of multiple center columns, so that multiple magnetic components can be more flexible to adjust the occupied space on the circuit.

The present invention has been disclosed through the above embodiments, but they are not intended to limit the present invention. Anyone familiar with this technical field and having ordinary knowledge can make some changes and modifications without departing from the spirit and scope of the present invention after understanding the above technical features and embodiments of the present invention. Therefore, the patent protection scope of the present invention shall be determined by the claims attached to this specification.

Claims (4)

1. A magnetic element integrated structure for a staggered resonant circuit architecture, comprising:

A central magnetic column;

the first magnetic element is provided with a first magnetic core body, a first winding post and a first coil, the first winding post is adjacent to one side of the central magnetic post, the first coil is wound on the first winding post, and the central magnetic post and the first magnetic element form a first transformer assembly;

the second magnetic element is provided with a second magnetic core body, a second winding post and a second coil, the second winding post is adjacent to the other side of the central magnetic post, the second coil is wound on the second winding post, and the central magnetic post and the second magnetic element form a second transformer assembly;

the third magnetic element is provided with a third magnetic core body, a third winding post and a third coil, the third winding post is adjacent to one side of the first magnetic core body, the third coil is wound on the third winding post, and the third magnetic element and the first magnetic core body form a first resonant inductance component; and

The fourth magnetic element is provided with a fourth magnetic core body, a fourth winding post and a fourth coil, the fourth winding post is adjacent to one side of the second magnetic core body, the fourth coil is wound on the fourth winding post, and the fourth magnetic element and the second magnetic core body form a second resonant inductance component.

2. The magnetic element integration structure for an interleaved resonant circuit architecture of claim 1, wherein the magnetic flux of the first transformer assembly cancels the magnetic flux of the second transformer assembly.

3. The magnetic element integration structure for an interleaved resonant circuit architecture of claim 1 wherein the magnetic flux of the first resonant inductor assembly cancels the magnetic flux of the first transformer assembly.

4. The magnetic element integration structure for an interleaved resonant circuit architecture of claim 1 wherein the magnetic flux of the second resonant inductor assembly cancels the magnetic flux of the second transformer assembly.