CN107895636A - A kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance - Google Patents
A kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance Download PDFInfo
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- CN107895636A CN107895636A CN201710890119.4A CN201710890119A CN107895636A CN 107895636 A CN107895636 A CN 107895636A CN 201710890119 A CN201710890119 A CN 201710890119A CN 107895636 A CN107895636 A CN 107895636A
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- 238000004804 winding Methods 0.000 title claims abstract description 154
- 239000003990 capacitor Substances 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 230000004907 flux Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F2027/408—Association with diode or rectifier
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- Coils Of Transformers For General Uses (AREA)
Abstract
The present invention relates to a kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance, including E-type magnetic core, I type magnetic cores, primary side winding, vice-side winding W1 ~ W4, rectifying tube D1 D4 and filter capacitor C1 ~ C4；The primary side winding is wound on the side column and center pillar of E-type magnetic core, and four I types windings of vice-side winding are stacked among two windows respectively two-by-two；Each I type windings are that the rectified pipe in one end is grounded, the filtered capacity earth in one end, or each I type windings are that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output；E-type magnetic core and I types magnetic core fasten；Wherein, two I type windings in the same window, the port of port and rectified pipe ground connection through capacity earth are located at homonymy.The invention enables vice-side winding can be equivalent to 0.5 circle, thus the half when number of turn of primary side can be caused to be changed into a circle secondary, greatly reduces the winding volume and difficulty of processing of transformer, improves power density.
Description
Technical field
The present invention relates to a kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance, belong to electromagnetic technology field.
Background technology
Flat surface transformer is usually used in the application scenario higher to power density requirements due to its small volume.Wherein LLC is humorous
Shake converter due to it can easier realize Sofe Switch, higher efficiency and power density and be widely used in high-end power supply and
In bus converter.
LLC resonant converter generally comprises prime full-bridge/half-bridge inversion circuit, resonant capacitance, resonant inductance, transformer and
Secondary commutation filter circuit.LLC resonant converter is usually used in the application scenario that 400V turns the big voltage change ratio such as 12V, therefore it becomes
Transformer voltage ratio can reach 16 or higher.
For topologys such as LLC resonant converters, in order to reduce its volume, its transformer typically uses flat surface transformer knot
Structure, and the window area of flat surface transformer is smaller.For the transformer of high no-load voltage ratio, due to conventional winding secondary minimum one
Circle, therefore be minimum 16 circle of its primary side number of turn of 16 transformer for a no-load voltage ratio.The primary side number of turn is too high may to cause transformation
The window area deficiency of device can not winding flash than transformer, or influence vice-side winding space and make it that larger cross-section can not be used
Vice-side winding and cause transformer capacity be restricted.
The content of the invention
The invention provides a kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance, for solving to be applied to LLC
The problem of large velocity ratio flat surface transformer primary side winding numbers of turn of the occasions such as controlled resonant converter excessive window area deficiency.
The technical scheme is that：A kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance, including E-type magnetic core,
I type magnetic cores, primary side winding, vice-side winding W1 ~ W4, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
The primary side winding is wound on the side column and center pillar of E-type magnetic core, and four I types windings of vice-side winding stack respectively two-by-two
Among two windows；Each I type windings are the rectified pipe ground connection in one end, the filtered capacity earth in one end, or each I types
Winding is that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output；E-type magnetic core and I types magnetic core fasten；Wherein, together
Two I type windings in one window, the port of port and rectified pipe ground connection through capacity earth are located at homonymy.
Each I type windings are the rectified pipe ground connection in one end, the filtered capacity earth in one end, are specially：
W1 upper ports are grounded through electric capacity C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；W2 upper ports pass through in vice-side winding
Rectifying tube D1 is grounded, and lower port is grounded through electric capacity C3；W3 upper ports are grounded through electric capacity C2 in vice-side winding, the rectified pipe of lower port
D4 is grounded；The rectified pipe D1 ground connection of W4 upper ports, lower port are grounded through electric capacity C4 in vice-side winding；Wherein W1W3 upper ports and
W2W4 lower ports are in parallel to be exported as positive pole.
Each I type windings are that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output, is specially：
W1 upper ports connect output end through electric capacity C1 in vice-side winding, and the rectified pipe D3 of lower port connects output end；W2 in vice-side winding
The rectified pipe D1 of upper port connects output end, and lower port connects output end through electric capacity C3；W3 upper ports connect through electric capacity C2 in vice-side winding
Output end, the rectified pipe D4 of lower port connect output end；The rectified pipe D1 of W4 upper ports connects output end, lower port warp in vice-side winding
Electric capacity C4 connects output end；Wherein W1W3 upper ports and W2W4 lower port earths.
The E-type magnetic core includes side column M1, M3, center pillar M2；Primary side winding be wound on E-type magnetic core side column M1, M3 and in
On post M2, umber of turn is distributed to adjust leakage inductance size on change side column, center pillar；Direction of winding and center pillar coiling side on side column
To on the contrary, two side column direction of windings are identical.
Umber of turn, which is distributed to adjust leakage inductance size, on the change side column, center pillar is specially：Increase by a circle center pillar winding,
It is corresponding to reduce each circle of two side column windings, it can guarantee that magnetizing inductance is constant while reduce leakage inductance；It is each to increase by two side column windings
One circle, it is corresponding to reduce the circle of center pillar winding one, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
The rectifying tube is diode or controllable devices.
The beneficial effects of the invention are as follows：
It is that higher no-load voltage ratio can be achieved without definite value using standard core, reduces the winding processing of high no-load voltage ratio flat surface transformer
Difficulty；The number of turn, which reduces, to be allowed to using more heavy in section winding so as to improve the current-carrying capacity of winding；Relative to other half turns
Transformer, symmetrical configuration of the present invention, half and half winding alternation forms a complete loop, in the absence of magnetic bias problem；Outlet letter
It is single, easily it can be connected with the current rectifying and wave filtering circuit of circuit part；Vice-side winding is allowd to be equivalent to 0.5 circle, thus
The half when number of turn of primary side can be caused to be changed into a circle secondary, the winding volume and difficulty of processing of transformer are greatly reduced,
Improve power density.
Brief description of the drawings
Fig. 1 is secondary structural representation of the present invention；
Fig. 2 is primary side structural representation of the present invention；
Fig. 3 is the structural representation of embodiment 1；
Fig. 4 is the structural representation of embodiment 2.
Embodiment
Embodiment 1：As Figure 1-3, the flat surface transformer of the I type half turn windings of a kind of leakage-adjustable inductance, including E-type magnetic
Core, I type magnetic cores, primary side winding, vice-side winding W1 ~ W4, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
The primary side winding is wound on the side column and center pillar of E-type magnetic core, and four I types windings of vice-side winding stack respectively two-by-two
Among two windows（W1, W2 are stacked between side column M1 and center pillar M2, and W3, W4 are stacked between M2 and M3；Stacking to be
Mounted on top, it can also side by side stack, be stacked side by side as shown in Fig. 3；It is overlapping for mounted on top W1 and above and below W2, W3 and
Above and below W4 is overlapping, so not shown in figure）；Each I type windings are the rectified pipe ground connection in one end, and the filtered electric capacity in one end connects
Ground；Wherein, two I type windings in the same window, the port of port and rectified pipe ground connection through capacity earth are located at homonymy.
It is the rectified pipe ground connection in one end it is possible to further set each I type windings, the filtered electric capacity in one end connects
Ground, specifically it is illustrated in figure 3：
W1 upper ports are grounded through electric capacity C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；W2 upper ports pass through in vice-side winding
Rectifying tube D1 is grounded, and lower port is grounded through electric capacity C3；W3 upper ports are grounded through electric capacity C2 in vice-side winding, the rectified pipe of lower port
D4 is grounded；The rectified pipe D1 ground connection of W4 upper ports, lower port are grounded through electric capacity C4 in vice-side winding；Wherein W1W3 upper ports and
W2W4 lower ports are in parallel to be exported as positive pole.
The E-type magnetic core includes side column M1, M3, center pillar M2；Primary side winding be wound on E-type magnetic core side column M1, M3 and in
On post M2, umber of turn is distributed to adjust leakage inductance size on change side column, center pillar；Direction of winding and center pillar coiling side on side column
To on the contrary, two side column direction of windings are identical（In Fig. 2, direction of winding is clockwise on two side columns, and center pillar direction of winding is inverse
Hour hands）.
It is possible to further set the change side column, umber of turn distribution is specially to adjust leakage inductance size on center pillar：
Increase by a circle center pillar winding, it is corresponding to reduce each circle of two side column windings, it can guarantee that magnetizing inductance is constant while reduce leakage inductance；Increase
Add each circle of two side column windings, it is corresponding to reduce the circle of center pillar winding one, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
Further, it is metal-oxide-semiconductor controllable devices to set the rectifying tube（As shown in Figure 3）.
Embodiment 2：As shown in Fig. 1-2 and Fig. 4, a kind of flat surface transformer of the I type half turn windings of leakage-adjustable inductance, including E
Type magnetic core, I type magnetic cores, primary side winding, vice-side winding W1 ~ W4, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
The primary side winding is wound on the side column and center pillar of E-type magnetic core, and four I types windings of vice-side winding stack respectively two-by-two
Among two windows；Each I type windings are that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output；E-type magnetic core
Fastened with I types magnetic core；Wherein, two I type windings in the same window, the end of port and rectified pipe ground connection through capacity earth
Mouth is located at homonymy.
It is that the rectified pipe in one end connects output, the filtered electric capacity in one end it is possible to further set each I type windings
Output is connect, is specifically illustrated in figure 4：
W1 upper ports connect output end through electric capacity C1 in vice-side winding, and the rectified pipe D3 of lower port connects output end；W2 in vice-side winding
The rectified pipe D1 of upper port connects output end, and lower port connects output end through electric capacity C3；W3 upper ports connect through electric capacity C2 in vice-side winding
Output end, the rectified pipe D4 of lower port connect output end；The rectified pipe D1 of W4 upper ports connects output end, lower port warp in vice-side winding
Electric capacity C4 connects output end；Wherein W1W3 upper ports and W2W4 lower port earths.
The E-type magnetic core includes side column M1, M3, center pillar M2；Primary side winding be wound on E-type magnetic core side column M1, M3 and in
On post M2, umber of turn is distributed to adjust leakage inductance size on change side column, center pillar；Direction of winding and center pillar coiling side on side column
To on the contrary, two side column direction of windings are identical.
It is possible to further set the change side column, umber of turn distribution is specially to adjust leakage inductance size on center pillar：
Increase by a circle center pillar winding, it is corresponding to reduce each circle of two side column windings, it can guarantee that magnetizing inductance is constant while reduce leakage inductance；Increase
Add each circle of two side column windings, it is corresponding to reduce the circle of center pillar winding one, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
The rectifying tube is diode（As shown in Figure 4）.
The present invention operation principle be：
As shown in figure 1, when W1W3 upper ports and the parallel connection of W2W4 lower ports are as positive pole output, principle is former as follows：
For the primary side winding structure of leakage-adjustable inductance：
Primary side winding is wound on side column and center pillar simultaneously, considers the winding on the winding and center pillar on side column for leakage inductance respectively
Contribution.For, around post, because its magnetic line of force has relatively large number of part to be closed by the air of periphery, thus being produced on side column
Raw leakage field is more, and the leakage inductance contribution to primary side winding is larger.And for the winding on center pillar, because it is by two side column bags
Enclose, its magnetic line of force is largely closed by magnetic core, thus caused leakage field is smaller, and the leakage inductance contribution to primary side winding is smaller.
Therefore, total leakage inductance of primary side winding can be adjusted during the number of turn distribution of center pillar and side column when we change.It should be noted simultaneously
, the magnetic line of force caused by the winding on each circle center pillar is equal to two side columns respectively around the magnetic line of force caused by a circle.
For half turn vice-side winding structure：
During work, primary side winding is passed through alternating current, and the magnetic flux of alternation is produced in magnetic core, and secondary sensing produces electric current to offset
Magnetic flux caused by primary current.Assuming that primary side is passed through as sinusoidal alternating current.
Assuming that the vertical paper in magnetic line of force direction in positive half period, magnetic pole M2 is outside and intensity gradually increases, then in order to
Offset the increase of this magnetic flux, it will have to form the trend of clockwise electric current in the winding of W1-W4 compositions, but due to for suitable
The electric current of hour hands, rectifying tube D2, D3 is in cut-off state, thus only W1W4 has electric current by now under W1 upper ports and W4
Port voltage is just, parallel connection is as output.
Then in negative half-cycle, the vertical paper in magnetic line of force direction in magnetic pole M2 is inside and intensity gradually increases, then in order to
Offset the increase of this magnetic flux, it will have to form the trend of electric current counterclockwise in the winding of W1 ~ W4 compositions, but due to rectifying tube
D1D4 is in cut-off state, thus has electric current in only W2W3 by the way that now W2 lower ports and W3 upper ports voltage are just parallel connection
As output.
It can be seen from above-mentioned analysis within a complete cycle, four winding alternate conductions, it has been always ensured that on W1
Port, W4 lower ports, W2 lower ports and W3 upper ports output end voltage in parallel is just.Simultaneously in each half period, output
Voltage is that the coils from parallel connection of coils of two half turns exports, therefore the voltage that the virtual voltage of tap is sensed to obtain by half-turn coil, because
This realizes the structure of half-turn coil.
As shown in figure 4, when W1W3 upper ports and the parallel connection of W2W4 lower ports are as ground, principle is former as follows：
For the primary side winding structure of leakage-adjustable inductance：
Primary side winding is wound on side column and center pillar simultaneously, considers the winding on the winding and center pillar on side column for leakage inductance respectively
Contribution.For, around post, because its magnetic line of force has relatively large number of part to be closed by the air of periphery, thus being produced on side column
Raw leakage field is more, and the leakage inductance contribution to primary side winding is larger.And for the winding on center pillar, because it is by two side column bags
Enclose, its magnetic line of force is largely closed by magnetic core, thus caused leakage field is smaller, and the leakage inductance contribution to primary side winding is smaller.
Therefore, total leakage inductance of primary side winding can be adjusted during the number of turn distribution of center pillar and side column when we change.It should be noted simultaneously
, the magnetic line of force caused by the winding on each circle center pillar is equal to two side columns respectively around the magnetic line of force caused by a circle.
For half turn vice-side winding structure：
During work, primary side winding is passed through alternating current, and the magnetic flux of alternation is produced in magnetic core, and secondary sensing produces electric current to offset
Magnetic flux caused by primary current.Assuming that primary side is passed through as sinusoidal alternating current.
Assuming that the vertical paper in magnetic line of force direction in positive half period, magnetic pole M2 is outside and intensity gradually increases, then in order to
Offset the increase of this magnetic flux, it will have to form the trend of clockwise electric current in the winding of W1 ~ W4 compositions, but due to for suitable
The electric current of hour hands, rectifying tube D1, D4 is in cut-off state, thus only W2W3 has electric current by now under W2 upper ports and W3
Port is high potential, and rectified pipe is in parallel as output.
Then in negative half-cycle, the vertical paper in magnetic line of force direction in magnetic pole M2 is inside and intensity gradually increases, then in order to
Offset the increase of this magnetic flux, it will have to form the trend of electric current counterclockwise in the winding of W1 ~ W4 compositions, but due to rectifying tube
D2D3 is in cut-off state, thus has electric current in only W1W4 by the way that now W1 lower ports and W4 upper ports are high potential, through whole
Flow tube is in parallel as output.
It can be seen from above-mentioned analysis within a complete cycle, four winding alternate conductions, it has been always ensured that under W1
Port, W4 upper ports, W2 upper ports and W3 lower ports are high potential, after rectified pipe parallel connection positive pole can be used as to export.Exist simultaneously
In each half period, output voltage is the coils from parallel connection of coils output of two half turns, therefore the virtual voltage of tap is half-turn coil institute
Obtained voltage is sensed, it is achieved that the structure of half-turn coil.
Above in conjunction with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put and make a variety of changes.
Claims (6)
- A kind of 1. flat surface transformer of the I type half turn windings of leakage-adjustable inductance, it is characterised in that：It is former including E-type magnetic core, I type magnetic cores Side winding, vice-side winding W1 ~ W4, rectifying tube D1-D4 and filter capacitor C1 ~ C4；The primary side winding is wound on the side column and center pillar of E-type magnetic core, and four I types windings of vice-side winding stack respectively two-by-two Among two windows；Each I type windings are the rectified pipe ground connection in one end, the filtered capacity earth in one end, or each I types Winding is that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output；E-type magnetic core and I types magnetic core fasten；Wherein, together Two I type windings in one window, the port of port and rectified pipe ground connection through capacity earth are located at homonymy.
- 2. the flat surface transformer of the I type half turn windings of leakage-adjustable inductance according to claim 1, it is characterised in that：It is described every Individual I types winding is the rectified pipe ground connection in one end, the filtered capacity earth in one end, is specially：W1 upper ports are grounded through electric capacity C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；W2 upper ports pass through in vice-side winding Rectifying tube D1 is grounded, and lower port is grounded through electric capacity C3；W3 upper ports are grounded through electric capacity C2 in vice-side winding, the rectified pipe of lower port D4 is grounded；The rectified pipe D1 ground connection of W4 upper ports, lower port are grounded through electric capacity C4 in vice-side winding；Wherein W1, W3 upper port and W2, W4 lower port are in parallel to be exported as positive pole.
- 3. the flat surface transformer of the I type half turn windings of leakage-adjustable inductance according to claim 1, it is characterised in that：It is described every Individual I types winding is that the rectified pipe in one end connects output, and the filtered electric capacity in one end connects output, is specially：W1 upper ports connect output end through electric capacity C1 in vice-side winding, and the rectified pipe D3 of lower port connects output end；W2 in vice-side winding The rectified pipe D1 of upper port connects output end, and lower port connects output end through electric capacity C3；W3 upper ports connect through electric capacity C2 in vice-side winding Output end, the rectified pipe D4 of lower port connect output end；The rectified pipe D1 of W4 upper ports connects output end, lower port warp in vice-side winding Electric capacity C4 connects output end；Wherein W1, W3 upper port and W2, W4 lower port earth.
- 4. the flat surface transformer of the I type half turn windings of leakage-adjustable inductance according to claim 1, it is characterised in that：The E types Magnetic core includes side column M1, M3, center pillar M2；Primary side winding is wound on side column M1, M3 and center pillar M2 of E-type magnetic core, changes side Umber of turn is distributed to adjust leakage inductance size on post, center pillar；Direction of winding and center pillar direction of winding are on the contrary, two side columns on side column Direction of winding is identical.
- 5. the flat surface transformer of the I type half turn windings of leakage-adjustable inductance according to claim 4, it is characterised in that：It is described to change Umber of turn, which is distributed to adjust leakage inductance size, on change side column, center pillar is specially：Increase by a circle center pillar winding, it is corresponding to reduce by two sides Each circle of post winding, it can guarantee that magnetizing inductance is constant while reduce leakage inductance；Increase each circle of two side column windings, in corresponding reduction The circle of post winding one, can guarantee that and increase leakage inductance while magnetizing inductance is constant.
- 6. the flat surface transformer of the I type half turn windings of leakage-adjustable inductance according to claim 1, it is characterised in that：It is described whole Flow tube is diode or controllable devices.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890119.4A CN107895636B (en) | 2017-09-27 | 2017-09-27 | A kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890119.4A CN107895636B (en) | 2017-09-27 | 2017-09-27 | A kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance |
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| Publication Number | Publication Date |
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| CN107895636B CN107895636B (en) | 2019-05-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899976A (en) * | 2020-08-26 | 2020-11-06 | 福州大学 | Wide-range control method and structure for leakage inductance of transformer |
| CN115223782A (en) * | 2022-07-26 | 2022-10-21 | 西安交通大学 | Fractional turn planar transformer and converter |
| US11862377B2 (en) | 2018-12-11 | 2024-01-02 | Huawei Technologies Co., Ltd. | Transformer and power supply |
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|---|---|---|---|---|
| US3768055A (en) * | 1972-06-23 | 1973-10-23 | Hewlett Packard Co | Transformer providing half-turn secondary windings |
| CN1319238A (en) * | 1998-08-21 | 2001-10-24 | 核子生态能量有限公司 | Planar transformer |
| CN1391698A (en) * | 1999-09-22 | 2003-01-15 | 艾利森公司 | Split inductor with fractional turn of each winding and PCB including same |
| CN1647355A (en) * | 2002-04-23 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | LLC half-bridge converter |
| CN201204547Y (en) * | 2008-05-06 | 2009-03-04 | 洋鑫科技股份有限公司 | Half-bridge LLC resonance converter with self-driving type synchronous rectifier |
-
2017
- 2017-09-27 CN CN201710890119.4A patent/CN107895636B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768055A (en) * | 1972-06-23 | 1973-10-23 | Hewlett Packard Co | Transformer providing half-turn secondary windings |
| CN1319238A (en) * | 1998-08-21 | 2001-10-24 | 核子生态能量有限公司 | Planar transformer |
| CN1391698A (en) * | 1999-09-22 | 2003-01-15 | 艾利森公司 | Split inductor with fractional turn of each winding and PCB including same |
| CN1647355A (en) * | 2002-04-23 | 2005-07-27 | 皇家飞利浦电子股份有限公司 | LLC half-bridge converter |
| CN201204547Y (en) * | 2008-05-06 | 2009-03-04 | 洋鑫科技股份有限公司 | Half-bridge LLC resonance converter with self-driving type synchronous rectifier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11862377B2 (en) | 2018-12-11 | 2024-01-02 | Huawei Technologies Co., Ltd. | Transformer and power supply |
| CN111899976A (en) * | 2020-08-26 | 2020-11-06 | 福州大学 | Wide-range control method and structure for leakage inductance of transformer |
| CN115223782A (en) * | 2022-07-26 | 2022-10-21 | 西安交通大学 | Fractional turn planar transformer and converter |
| WO2024021539A1 (en) * | 2022-07-26 | 2024-02-01 | 西安交通大学 | Fractional-turn planar transformer, and converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107895636B (en) | 2019-05-10 |
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Effective date of registration: 20221104 Address after: Room B2003 and B2004, Building A1, Shazhouhu Science Park, No. 188, Huachang Road, Yangshe Town, Zhangjiagang City, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Kafang Energy Technology Co.,Ltd. Address before: 650093 No. 253, Xuefu Road, Wuhua District, Yunnan, Kunming Patentee before: Kunming University of Science and Technology |
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