CN107946045A - A kind of leakage-adjustable inductance flat surface transformer of half turn winding - Google Patents
A kind of leakage-adjustable inductance flat surface transformer of half turn winding Download PDFInfo
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- CN107946045A CN107946045A CN201710889238.8A CN201710889238A CN107946045A CN 107946045 A CN107946045 A CN 107946045A CN 201710889238 A CN201710889238 A CN 201710889238A CN 107946045 A CN107946045 A CN 107946045A
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- 238000004804 winding Methods 0.000 title claims abstract description 175
- 239000003990 capacitor Substances 0.000 claims abstract description 56
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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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
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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
- H01F2027/408—Association with diode or rectifier
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Abstract
The present invention relates to a kind of leakage-adjustable inductance flat surface transformer of half turn winding, including E-type magnetic core, I type magnetic cores, primary side winding, vice-side winding U1 U2, rectifying tube D1 D4 and filter capacitor C1 ~ C4；Primary side winding is wound on the side column and center pillar of E-type magnetic core, two U-shaped windings of vice-side winding are reversely stacked in transformer window, four ports of two U-shaped windings of vice-side winding are connected with a rectifying tube one end respectively, the rectifying tube other end is connected with a filter capacitor one end, the filter capacitor other end is connected with the centre cap of corresponding U-shaped winding, and E-type magnetic core and I types magnetic core fasten.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 leakage-adjustable inductance flat surface transformer of half turn winding, 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 busbar 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 generally 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 excessive 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 present invention provides a kind of leakage-adjustable inductance flat surface transformer of half turn winding, for solving to be applied to LLC resonance
The problem of excessive window area of the large velocity ratio flat surface transformer primary side winding number of turn of the occasions such as converter is insufficient.
The technical scheme is that：A kind of leakage-adjustable inductance flat surface transformer of half turn winding, including E-type magnetic core, I type magnetic
Core, primary side winding, vice-side winding U1-U2, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
Primary side winding is wound on the side column and center pillar of E-type magnetic core, and two U-shaped windings of vice-side winding are reversely stacked in transformer
In window, four ports of two U-shaped windings of vice-side winding are connected with a rectifying tube one end respectively, the rectifying tube other end with
One filter capacitor one end connection, the filter capacitor other end are connected with the centre cap of corresponding U-shaped winding, E-type magnetic core and I type magnetic
Core fastens.
Four ports of two U-shaped windings of the vice-side winding are connected with a rectifying tube one end respectively, and rectifying tube is another
One end is connected with a filter capacitor one end, and the filter capacitor other end is connected with the centre cap of corresponding U-shaped winding, is specially：
The rectifying tube ground connection of four ports four of two U-shaped windings, filter capacitor C1, C2 mono- terminate centre cap T1, filtering
Another termination rectifying tube D1 one end of capacitance C1, another termination rectifying tube D2 one end of filter capacitor C2, filter capacitor C3, C4 mono- are terminated
Another termination rectifying tube D3 one end of centre cap T2, filter capacitor C3, another termination rectifying tube D4 one end of filter capacitor C4；Two
Centre cap T1, T2 Parallel opertation of U-shaped winding；
Or it is specially：
It is in parallel after U1 two-ports rectified pipe D1, D2 in two U-shaped windings, the rectified pipe D3 of U2 two-ports in two U-shaped windings,
It is in parallel after D4, exported after both parallel connections as cathode；Filter capacitor C1, C2 mono- terminates centre cap T1, and filter capacitor C1 is another
One termination rectifying tube D1 one end, another termination rectifying tube D2 one end of filter capacitor C2, filter capacitor C3, C4 one end centre cap
Another termination rectifying tube D3 one end of T2, filter capacitor C3, another termination rectifying tube D4 one end of filter capacitor C4, two U-shaped windings
Centre cap T1, T2 as ground.
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 column 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 one circle of center pillar winding, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
The vice-side winding two is one group, can one group of exclusive use or multigroup used in parallel.
The rectifying tube is diode or controllable devices.
The beneficial effects of the invention are as follows：Using standard core, it is that the no-load voltage ratio of higher can be achieved without definite value, reduces high change
Than the winding difficulty of processing of flat surface transformer；The number of turn, which reduces, to be allowed to using more heavy in section winding so as to improve winding
Current-carrying capacity；Relative to other half turns transformers, symmetrical configuration of the present invention, fifty-fifty winding works alternatively to form a complete loop,
There is no magnetic bias problem；Outlet is simple, can easily be connected with the current rectifying and wave filtering circuit of circuit part；Primary side winding can be with
Convenient debugging leakage inductance, easy to the debugging and realization of integrated magnetic；Vice-side winding is allowd to be equivalent to 0.5 circle, thus can
So that the half when number of turn of primary side is changed into a circle secondary, greatly reduces the winding volume and difficulty of processing of transformer, carries
High power density.
Brief description of the drawings
Fig. 1 is half turn vice-side winding structure diagram of the present invention；
Fig. 2 is leakage-adjustable inductance primary side winding structure diagram of the present invention；
Fig. 3 is assembling schematic diagram of the present invention；
Fig. 4 is 1 structure diagram of embodiment；
Fig. 5 is 2 structure diagram of embodiment.
Embodiment
Embodiment 1：As shown in Figs 1-4, a kind of leakage-adjustable inductance flat surface transformer of half turn winding, including E-type magnetic core, I types
Magnetic core, primary side winding, vice-side winding U1-U2, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
Primary side winding is wound on the side column and center pillar of E-type magnetic core, and two U-shaped windings of vice-side winding are reversely stacked in transformer
In window（It is mounted on top to stack, and can also side by side stack, be stacked side by side as shown in Fig. 4；For mounted on top W1
Overlapping with above and below W2, W3 and above and below W4 are overlapping, so not shown in figure）, four ports of two U-shaped windings of vice-side winding
Be connected respectively with a rectifying tube one end, the rectifying tube other end is connected with a filter capacitor one end, the filter capacitor other end with
The centre cap connection of corresponding U-shaped winding, E-type magnetic core and I types magnetic core fasten.Wherein, the vice-side winding Ws is complete including two
Exactly the same U-shaped winding, W1 sections and W3 sections one of U-shaped windings of composition of winding, centre is left in W1 and W3 sections of centre positions
Tap T1；W2 sections and W4 sections of winding forms another U-shaped winding, and centre tap T2 is left in W2 and W4 sections of centre positions；It is described
Magnetic core is standard EI type flat surface transformer magnetic cores.
Four ports of two U-shaped windings of the vice-side winding are connected with a rectifying tube one end respectively, and rectifying tube is another
One end is connected with a filter capacitor one end, and the filter capacitor other end is connected with the centre cap of corresponding U-shaped winding, specific as schemed
4 show：
The rectifying tube ground connection of four ports four of two U-shaped windings, filter capacitor C1, C2 mono- terminate centre cap T1, filtering
Another termination metal-oxide-semiconductor grids of capacitance C1, another termination metal-oxide-semiconductor grids of filter capacitor C2, filter capacitor C3, C4 mono- terminate center and take out
Another termination metal-oxide-semiconductor grids of head T2, filter capacitor C3, another termination metal-oxide-semiconductor grids of filter capacitor C4；In two U-shaped windings
Heart tap T1, T2 Parallel opertation.
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 column 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 one circle of center pillar winding, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
The vice-side winding two is one group, can one group of exclusive use or multigroup used in parallel（One group is given in Fig. 4
Situation）.
Further, it is metal-oxide-semiconductor controllable devices to set the rectifying tube（As shown in Figure 4）.
Embodiment 2：As shown in Fig. 1-3 and Fig. 5, a kind of leakage-adjustable inductance flat surface transformer of half turn winding, including E-type magnetic
Core, I type magnetic cores, primary side winding, vice-side winding U1-U2, rectifying tube D1-D4 and filter capacitor C1 ~ C4；
Primary side winding is wound on the side column and center pillar of E-type magnetic core, and two U-shaped windings of vice-side winding are reversely stacked in transformer
In window, four ports of two U-shaped windings of vice-side winding are connected with a rectifying tube one end respectively, the rectifying tube other end with
One filter capacitor one end connection, the filter capacitor other end are connected with the centre cap of corresponding U-shaped winding, E-type magnetic core and I type magnetic
Core fastens.
Four ports of two U-shaped windings of the vice-side winding are connected with a rectifying tube one end respectively, and rectifying tube is another
One end is connected with a filter capacitor one end, and the filter capacitor other end is connected with the centre cap of corresponding U-shaped winding, is specially：
It is in parallel after U1 two-ports rectified pipe D1, D2 in two U-shaped windings, the rectified pipe D3 of U2 two-ports in two U-shaped windings,
It is in parallel after D4, exported after both parallel connections as cathode；Filter capacitor C1, C2 mono- terminates centre cap T1, and filter capacitor C1 is another
One termination rectifying tube D1 cathodes, another termination rectifying tube D2 cathodes of filter capacitor C2, filter capacitor C3, C4 one end centre cap
Another termination rectifying tube D3 cathodes of T2, filter capacitor C3, another termination rectifying tube D4 cathodes of filter capacitor C4, two U-shaped windings
Centre cap T1, T2 as ground；
The E-type 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
On, umber of turn is distributed to adjust leakage inductance size on change side column, center pillar；Direction of winding and center pillar direction of winding phase on side column
Instead, 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 one circle of center pillar winding, it can guarantee that and increase leakage inductance while magnetizing inductance is constant.
The vice-side winding two is one group, can one group of exclusive use or multigroup used in parallel（One group is given in Fig. 5
Situation）.
The rectifying tube is diode（As shown in Figure 5）.
The present invention operation principle be：
As shown in Figure 4, in the case of centre cap is used as cathode, principle is as follows：
For the primary side winding structure of leakage-adjustable inductance：
Primary side winding is wound on side column and center pillar at the same time, considers the winding on the winding and center pillar on side column for leakage inductance respectively
Contribution.For, around column, since 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, since it is by two side column bags
Enclose, its magnetic line of force is largely closed by magnetic core, thus the leakage field produced 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 at the same time
, the magnetic line of force that the winding on each circle center pillar produces is equal to the magnetic line of force that two side columns are respectively produced around 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
The magnetic flux that primary current produces.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 W2W4 compositions, but since W4 is connect
Rectifying tube be now in cut-off state, therefore only there is electric current to flow through in W2 one side of something winding, direction is to flow to tap T1 by D3,
Tap T1 voltages is just at this time.Can have to form the trend of clockwise electric current in the winding that W1W3 is formed at the same time, but due to W1
The rectifying tube connect is now in cut-off state, therefore only has electric current to flow through in W3 one side of something winding, during direction is is flowed to by D2
Heart tap T2, tap T2 voltages is just at this time.
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 W2W4 compositions, but since W2 is connect
Rectifying tube be now in cut-off state, therefore only there is electric current to flow through in W4 one side of something winding, direction is to flow to tap T1 by D4,
Tap T1 voltages is just at this time.Can have to form the trend of electric current counterclockwise in the winding that W1W3 is formed at the same time, but due to W3
The rectifying tube connect is now in cut-off state, therefore only has electric current to flow through in W1 one side of something winding, during direction is is flowed to by D1
Heart tap T2, tap T2 voltages is just at this time.
It can be seen from above-mentioned analysis within a complete cycle, each arm alternate conduction of winding, has been always ensured that pumping
Head T1T2 output positive voltages.At the same time in each half period, output voltage exports for the coils from parallel connection of coils of two half turns, therefore tap
The voltage that is sensed by half-turn coil of virtual voltage, it is achieved that the structure of half-turn coil.
As shown in Figure 5, for centre cap as use in the case of, principle is as follows：
For the primary side winding structure of leakage-adjustable inductance：
Primary side winding is wound on side column and center pillar at the same time, considers the winding on the winding and center pillar on side column for leakage inductance respectively
Contribution.For, around column, since 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, since it is by two side column bags
Enclose, its magnetic line of force is largely closed by magnetic core, thus the leakage field produced 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 at the same time
, the magnetic line of force that the winding on each circle center pillar produces is equal to the magnetic line of force that two side columns are respectively produced around 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
The magnetic flux that primary current produces.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 W2W4 compositions, but since W2 is connect
Rectifying tube be now in cut-off state, therefore only there is electric current to flow through in W4 one side of something winding, direction is to flow to tap D4 by T1,
Tap T1 is ground at this time, and diode D4 cathode voltages is just.Clockwise electricity can be formed in the winding that W1W3 is formed at the same time
The trend of stream, but since the W3 rectifying tubes connect are now in cut-off state, only there is electric current to flow through in W1 one side of something winding,
Direction is to flow to centre cap D1 by T2, and tap T2 is ground at this time, and diode D1 cathode voltages is just.
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 W2W4 compositions, but since W4 is connect
Rectifying tube be now in cut-off state, therefore only there is electric current to flow through in W2 one side of something winding, direction is to flow to D3 by tap T1,
Tap T1 is ground at this time, and diode D3 cathode voltages is just.Can have to form electricity counterclockwise in the winding that W1W3 is formed at the same time
The trend of stream, but since the W1 rectifying tubes connect are now in cut-off state, only there is electric current to flow through in W3 one side of something winding,
Direction is to flow to D2 by centre cap T2, and tap T2 is ground at this time, and diode D2 cathode voltages is just.
It can be seen from above-mentioned analysis within a complete cycle, each arm alternate conduction of winding, has been always ensured that pumping
Head T1T2 is ground, and diode cathode voltage is just.At the same time in each half period, output voltage is the coils from parallel connection of coils of two half turns
Output, therefore the voltage that the virtual voltage of diode cathode is sensed by half-turn coil, it is achieved that half-turn coil
Structure.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned
Embodiment, within the knowledge of a person skilled in the art, can also be before present inventive concept not be departed from
Put and make a variety of changes.
Claims (6)
- A kind of 1. leakage-adjustable inductance flat surface transformer of half turn winding, it is characterised in that：Including E-type magnetic core, I type magnetic cores, primary side around Group, vice-side winding U1-U2, rectifying tube D1-D4 and filter capacitor C1 ~ C4；Primary side winding is wound on the side column and center pillar of E-type magnetic core, and two U-shaped windings of vice-side winding are reversely stacked in transformer In window, four ports of two U-shaped windings of vice-side winding are connected with a rectifying tube one end respectively, the rectifying tube other end with One filter capacitor one end connection, the filter capacitor other end are connected with the centre cap of corresponding U-shaped winding, E-type magnetic core and I type magnetic Core fastens.
- 2. the leakage-adjustable inductance flat surface transformer of half turn winding according to claim 1, it is characterised in that：The vice-side winding Four ports of two U-shaped windings be connected respectively with a rectifying tube one end, the rectifying tube other end and a filter capacitor one End connection, the filter capacitor other end are connected with the centre cap of corresponding U-shaped winding, are specially：The rectifying tube ground connection of four ports four of two U-shaped windings, filter capacitor C1, C2 mono- terminate centre cap T1, filtering Another termination rectifying tube D1 one end of capacitance C1, another termination rectifying tube D2 one end of filter capacitor C2, filter capacitor C3, C4 mono- are terminated Another termination rectifying tube D3 one end of centre cap T2, filter capacitor C3, another termination rectifying tube D4 one end of filter capacitor C4；Two Centre cap T1, T2 Parallel opertation of U-shaped winding；Or it is specially：It is in parallel after U1 two-ports rectified pipe D1, D2 in two U-shaped windings, the rectified pipe D3 of U2 two-ports in two U-shaped windings, It is in parallel after D4, exported after both parallel connections as cathode；Filter capacitor C1, C2 mono- terminates centre cap T1, and filter capacitor C1 is another One termination rectifying tube D1 one end, another termination rectifying tube D2 one end of filter capacitor C2, filter capacitor C3, C4 one end centre cap Another termination rectifying tube D3 one end of T2, filter capacitor C3, another termination rectifying tube D4 one end of filter capacitor C4, two U-shaped windings Centre cap T1, T2 as ground.
- 3. the leakage-adjustable inductance flat surface transformer of half turn winding according to claim 1, it is characterised in that：The E-type magnetic core Including 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, change side column, in Umber of turn is distributed to adjust leakage inductance size on column；Direction of winding and center pillar direction of winding are on the contrary, two side column coilings on side column Direction is identical.
- 4. the leakage-adjustable inductance flat surface transformer of half turn winding according to claim 3, it is characterised in that：The change side Umber of turn, which is distributed to adjust leakage inductance size, on column, center pillar is specially：Increase by a circle center pillar winding, it is corresponding reduce two side columns around Each circle of group, can guarantee that magnetizing inductance is constant while reduces leakage inductance；Increase each circle of two side column windings, it is corresponding reduce center pillar around One circle of group, can guarantee that and increase leakage inductance while magnetizing inductance is constant.
- 5. the leakage-adjustable inductance flat surface transformer of half turn winding according to claim 1, it is characterised in that：The vice-side winding Two are one group, can one group of exclusive use or multigroup used in parallel.
- 6. the leakage-adjustable inductance flat surface transformer of half turn winding according to claim 1, it is characterised in that：The rectifying tube is Diode or controllable devices.
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| CN201710889238.8A CN107946045B (en) | 2017-09-27 | 2017-09-27 | A kind of leakage-adjustable inductance flat surface transformer of half turn winding |
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| CN201710889238.8A CN107946045B (en) | 2017-09-27 | 2017-09-27 | A kind of leakage-adjustable inductance flat surface transformer of half turn winding |
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| CN107946045B CN107946045B (en) | 2019-05-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110828126A (en) * | 2019-10-14 | 2020-02-21 | 华为技术有限公司 | Planar transformer and active circuit |
| US20200075214A1 (en) * | 2018-08-31 | 2020-03-05 | Sehat Sutardja | Fractional transformer |
| CN112562983A (en) * | 2020-10-28 | 2021-03-26 | 南京航空航天大学 | PCB (printed circuit board) planar transformer based on non-integer turn winding design |
| CN114421775A (en) * | 2022-01-10 | 2022-04-29 | 上海交通大学 | Four-port medium-voltage insulating transformer, SST auxiliary power supply system and startup method |
| CN115223782A (en) * | 2022-07-26 | 2022-10-21 | 西安交通大学 | Fractional turn planar transformer and converter |
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| GB131026A (en) * | 1918-03-25 | 1919-08-21 | British Westinghouse Electric | Improvements in Electrical Transformers. |
| US3768055A (en) * | 1972-06-23 | 1973-10-23 | Hewlett Packard Co | Transformer providing half-turn secondary windings |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200075214A1 (en) * | 2018-08-31 | 2020-03-05 | Sehat Sutardja | Fractional transformer |
| US11948729B2 (en) * | 2018-08-31 | 2024-04-02 | Sehat Sutardja | Fractional transformer |
| CN110828126A (en) * | 2019-10-14 | 2020-02-21 | 华为技术有限公司 | Planar transformer and active circuit |
| WO2021073121A1 (en) * | 2019-10-14 | 2021-04-22 | 华为技术有限公司 | Planar transformer and active circuit |
| CN112562983A (en) * | 2020-10-28 | 2021-03-26 | 南京航空航天大学 | PCB (printed circuit board) planar transformer based on non-integer turn winding design |
| CN112562983B (en) * | 2020-10-28 | 2022-03-25 | 南京航空航天大学 | PCB (printed circuit board) planar transformer based on non-integer turn winding design |
| CN114421775A (en) * | 2022-01-10 | 2022-04-29 | 上海交通大学 | Four-port medium-voltage insulating transformer, SST auxiliary power supply system and startup method |
| CN115223782A (en) * | 2022-07-26 | 2022-10-21 | 西安交通大学 | Fractional turn planar transformer and converter |
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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 |