CN107895636B - A kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance - Google Patents
A kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance Download PDFInfo
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- CN107895636B CN107895636B CN201710890119.4A CN201710890119A CN107895636B CN 107895636 B CN107895636 B CN 107895636B CN 201710890119 A CN201710890119 A CN 201710890119A CN 107895636 B CN107895636 B CN 107895636B
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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
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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 flat surface transformers of the I type half turn winding of leakage-adjustable inductance, including E-type magnetic core, I type magnetic core, 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 type windings of vice-side winding are stacked in respectively two-by-two among two windows；Each I type winding is the rectified pipe ground connection in one end, and one end is grounded through filter capacitor or each I type winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor；E-type magnetic core and I type 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 ipsilateral.The invention enables vice-side windings can be equivalent to 0.5 circle, thus half when the number of turns of primary side can be made to become a circle pair side, 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 transformers of the I type half turn winding of leakage-adjustable inductance, belong to electromagnetic technology field.
Background technique
Flat surface transformer is usually used in due to its small volume to the higher application of power density requirements.Wherein LLC is humorous
Vibration 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 that 400V turns the big voltage change ratio such as 12V, therefore it becomes
Transformer voltage ratio can achieve 16 or higher.
For topologys such as LLC resonant converters, in order to reduce its volume, 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 pair side minimum one
Circle, therefore be minimum 16 circle of its primary side the number of turns of 16 transformer for a no-load voltage ratio.Primary side the number of turns is excessively high to may cause transformation
The window area deficiency of device can not winding flash than transformer, or influence vice-side winding space and not being available larger cross-section
Vice-side winding and transformer capacity is restricted.
Summary of the invention
The present invention provides a kind of flat surface transformers of the I type half turn winding of leakage-adjustable inductance, for solving to be applied to LLC
The problem of the excessive window area deficiency of large velocity ratio flat surface transformer primary side winding the number of turns of the occasions such as controlled resonant converter.
The technical scheme is that a kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance, including E-type magnetic core,
I type magnetic core, 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 type windings of vice-side winding are distinguished two-by-two
It is stacked among two windows；Each I type winding is the rectified pipe ground connection in one end, and one end is grounded through filter capacitor, or every
A I type winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor；E-type magnetic core and I type magnetic core fasten；Its
In, two I type windings in the same window, the port of port and rectified pipe ground connection through capacity earth is located at ipsilateral.
Each I type winding is the rectified pipe ground connection in one end, and one end is grounded through filter capacitor, specifically:
W1 upper port is grounded through capacitor C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；The upper end W2 in vice-side winding
The rectified pipe D1 ground connection of mouth, lower port are grounded through capacitor C3；W3 upper port is grounded through capacitor C2 in vice-side winding, and lower port is through whole
Flow tube D4 ground connection；The rectified pipe D1 ground connection of W4 upper port, lower port are grounded through capacitor C4 in vice-side winding；Wherein W1W3 upper port
With W2W4 lower port parallel connection as anode output.
Each I type winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor, specifically:
W1 upper port connects output end through capacitor C1 in vice-side winding, and the rectified pipe D3 of lower port connects output end；Vice-side winding
The middle rectified pipe D1 of W2 upper port connects output end, and lower port connects output end through capacitor C3；W3 upper port is through capacitor in vice-side winding
C2 connects output end, and the rectified pipe D4 of lower port connects output end；The rectified pipe D1 of W4 upper port connects output end, lower end in vice-side winding
Mouth connects output end through capacitor C4；Wherein W1W3 upper port and W2W4 lower port earth.
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 distribution is on change side column, center pillar to adjust leakage inductance size；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 distribution is on the change side column, center pillar to adjust leakage inductance size specifically: 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 reducing 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 and increase leakage inductance while magnetizing inductance is constant.
The rectifying tube is diode or controllable devices.
The beneficial effects of the present invention are:
Using standard core, higher no-load voltage ratio can be realized without definite value, reduce the winding of high no-load voltage ratio flat surface transformer
Difficulty of processing；The number of turns reduces the current-carrying capacity for allowing to that winding is improved using more heavy in section winding；Relative to other
Half turns transformer, structure of the invention is symmetrical, and fifty-fifty winding works alternatively to form a complete loop, and bias problem is not present；Out
Line is simple, can easily connect with the current rectifying and wave filtering circuit of circuit part；So that vice-side winding can be equivalent to 0.5 circle,
Half when thus the number of turns of primary side can be made to become a circle pair side, greatly reduces the winding volume and difficult processing of transformer
Degree, improves power density.
Detailed description of the invention
Fig. 1 is the secondary side structural schematic diagram of the present invention；
Fig. 2 is primary side structural schematic diagram of the present invention；
Fig. 3 is 1 structural schematic diagram of embodiment；
Fig. 4 is 2 structural schematic diagram of embodiment.
Specific embodiment
Embodiment 1: as shown in Figure 1-3, a kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance, including E-type magnetic
Core, I type magnetic core, 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 type windings of vice-side winding are distinguished two-by-two
It is stacked among two windows that (W1, W2 are stacked between side column M1 and center pillar M2, and W3, W4 are stacked between M2 and M3；Stacking can
Think mounted on top, can also stack, be stacked side by side as shown in Fig. 3 side by side；It is overlapped for mounted on top W1 and W2 or more,
W3 and W4 or more overlapping, so not shown in figure)；Each I type winding is the rectified pipe ground connection in one end, and one end is through filtered electrical
Hold ground connection；Wherein, the port of two I type windings in the same window, port and rectified pipe ground connection through capacity earth is located at
It is ipsilateral.
It is the rectified pipe ground connection in one end it is possible to further which each I type winding is arranged, one end connects through filter capacitor
Ground, it is specific as shown in Figure 3 are as follows:
W1 upper port is grounded through capacitor C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；The upper end W2 in vice-side winding
The rectified pipe D1 ground connection of mouth, lower port are grounded through capacitor C3；W3 upper port is grounded through capacitor C2 in vice-side winding, and lower port is through whole
Flow tube D4 ground connection；The rectified pipe D1 ground connection of W4 upper port, lower port are grounded through capacitor C4 in vice-side winding；Wherein W1W3 upper port
With W2W4 lower port parallel connection as anode output.
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 distribution is on change side column, center pillar to adjust leakage inductance size；Direction of winding and center pillar coiling side on side column
To on the contrary, two side column direction of windings it is identical (in Fig. 2, direction of winding is clockwise on two side columns, center pillar direction of winding be it is inverse
Hour hands).
It is possible to further which the change side column is arranged, on center pillar umber of turn distribution to adjust leakage inductance size specifically:
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 reducing 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 and increase leakage inductance while magnetizing inductance is constant.
Further, it is metal-oxide-semiconductor controllable devices (as shown in Figure 3) that the rectifying tube, which is arranged,.
Embodiment 2: as shown in Fig. 1-2 and Fig. 4, a kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance, including E
Type magnetic core, I type magnetic core, 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 type windings of vice-side winding are distinguished two-by-two
It is stacked among two windows；Each I type winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor；E type
Magnetic core and I type magnetic core fasten；Wherein, two I type windings in the same window, port and rectified pipe ground connection through capacity earth
Port be located at it is ipsilateral.
It is that the rectified pipe in one end connects output it is possible to further which each I type winding is arranged, one end is through filter capacitor
Output is connect, it is specific as shown in Figure 4 are as follows:
W1 upper port connects output end through capacitor C1 in vice-side winding, and the rectified pipe D3 of lower port connects output end；Vice-side winding
The middle rectified pipe D1 of W2 upper port connects output end, and lower port connects output end through capacitor C3；W3 upper port is through capacitor in vice-side winding
C2 connects output end, and the rectified pipe D4 of lower port connects output end；The rectified pipe D1 of W4 upper port connects output end, lower end in vice-side winding
Mouth connects output end through capacitor C4；Wherein W1W3 upper port and W2W4 lower port earth.
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 distribution is on change side column, center pillar to adjust leakage inductance size；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 which the change side column is arranged, on center pillar umber of turn distribution to adjust leakage inductance size specifically:
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 reducing 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 and increase leakage inductance while magnetizing inductance is constant.
The rectifying tube is diode (as shown in Figure 4).
The operation principle of the present invention is that:
As shown in Figure 1, principle is former as follows when W1W3 upper port and W2W4 lower port parallel connection are as anode output:
For the primary side winding structure of leakage-adjustable inductance:
Primary side winding is wound on side column and center pillar simultaneously, respectively consider side column on winding and center pillar on winding for
The contribution of leakage inductance.For, around column, being closed since its magnetic line of force has relatively large number of part to pass through peripheral air on side column, because
And the leakage field generated is more, it is larger to the leakage inductance contribution of primary side winding.And for the winding on center pillar, since it is by two side columns
Surround, the magnetic line of force is largely closed by magnetic core, thus the leakage field generated is smaller, to the contribution of the leakage inductance of primary side winding compared with
It is small.Therefore, total leakage inductance of primary side winding can be adjusted when the number of turns distribution of center pillar and side column when we change.It needs to infuse simultaneously
It anticipates, the magnetic line of force that the winding on each circle center pillar generates is equal to the magnetic line of force that two side columns are respectively generated around a circle.
For half turn vice-side winding structure:
When work, primary side winding is passed through alternating current, and the magnetic flux of alternation is generated in magnetic core, and secondary side induction generates electric current
Offset the magnetic flux that primary current generates.Assuming that primary side is passed through as sinusoidal alternating current.
Assuming that in positive half period, the vertical paper in magnetic line of force direction in magnetic pole M2 is outward and intensity is gradually increased, then in order to
Offset the increase of this magnetic flux, it will have the tendency that forming clockwise electric current in the winding of W1-W4 composition, but due to for suitable
The electric current of hour hands, rectifying tube D2, D3 is in off state, thus only W1W4 has electric current to pass through, at this time under W1 upper port and W4
Port voltage is positive, and parallel connection is as output.
Then in negative half-cycle, the vertical paper in magnetic line of force direction in magnetic pole M2 is inwardly and intensity is gradually increased, then in order to
Offset the increase of this magnetic flux, it will have the tendency that forming electric current counterclockwise in the winding of W1 ~ W4 composition, but due to rectifying tube
D1D4 is in off state, thus has electric current to pass through in only W2W3, and W2 lower port and W3 upper port voltage are positive at this time, in parallel
As output.
From the above analysis as can be seen that four winding alternate conductions have been always ensured that on W1 within a complete period
The output end voltage of port, W4 lower port, W2 lower port and W3 upper port parallel connection is positive.Simultaneously in each half period, output
Voltage exports for the coils from parallel connection of coils of two half turns, therefore the voltage that the virtual voltage of tap is incuded by half-turn coil, because
This realizes the structure of half-turn coil.
As shown in figure 4, principle is former as follows when W1W3 upper port and W2W4 lower port parallel connection are as ground:
For the primary side winding structure of leakage-adjustable inductance:
Primary side winding is wound on side column and center pillar simultaneously, respectively consider side column on winding and center pillar on winding for
The contribution of leakage inductance.For, around column, being closed since its magnetic line of force has relatively large number of part to pass through peripheral air on side column, because
And the leakage field generated is more, it is larger to the leakage inductance contribution of primary side winding.And for the winding on center pillar, since it is by two side columns
Surround, the magnetic line of force is largely closed by magnetic core, thus the leakage field generated is smaller, to the contribution of the leakage inductance of primary side winding compared with
It is small.Therefore, total leakage inductance of primary side winding can be adjusted when the number of turns distribution of center pillar and side column when we change.It needs to infuse simultaneously
It anticipates, the magnetic line of force that the winding on each circle center pillar generates is equal to the magnetic line of force that two side columns are respectively generated around a circle.
For half turn vice-side winding structure:
When work, primary side winding is passed through alternating current, and the magnetic flux of alternation is generated in magnetic core, and secondary side induction generates electric current
Offset the magnetic flux that primary current generates.Assuming that primary side is passed through as sinusoidal alternating current.
Assuming that in positive half period, the vertical paper in magnetic line of force direction in magnetic pole M2 is outward and intensity is gradually increased, then in order to
Offset the increase of this magnetic flux, it will have the tendency that forming clockwise electric current in the winding of W1 ~ W4 composition, but due to for suitable
The electric current of hour hands, rectifying tube D1, D4 is in off state, thus only W2W3 has electric current to pass through, at this time under W2 upper port and W3
Port is high potential, and rectified pipe parallel connection is as output.
Then in negative half-cycle, the vertical paper in magnetic line of force direction in magnetic pole M2 is inwardly and intensity is gradually increased, then in order to
Offset the increase of this magnetic flux, it will have the tendency that forming electric current counterclockwise in the winding of W1 ~ W4 composition, but due to rectifying tube
D2D3 is in off state, thus has electric current to pass through in only W1W4, and W1 lower port and W4 upper port are high potential at this time, through whole
Flow tube parallel connection is as output.
From the above analysis as can be seen that four winding alternate conductions have been always ensured that under W1 within a complete period
Port, W4 upper port, W2 upper port and W3 lower port are high potential, and parallel connection can be used as positive output after rectified pipe.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 incuded, it is achieved that the structure of half-turn coil.
Above in conjunction with attached drawing, the embodiment of the present invention is explained in detail, 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 not departing from present inventive concept
It puts and makes a variety of changes.
Claims (5)
1. a kind of flat surface transformer of the I type half turn winding of leakage-adjustable inductance, it is characterised in that: including E-type magnetic core, I type magnetic core is former
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 type windings of vice-side winding stack respectively two-by-two
Among two windows；Each I type winding is the rectified pipe ground connection in one end, and one end is grounded through filter capacitor or each I type
Winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor；E-type magnetic core and I type 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 ipsilateral；
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 distribution is on change side column, center pillar to adjust leakage inductance size；Direction of winding and center pillar direction of winding phase on side column
Instead, two side column direction of windings are identical.
2. the flat surface transformer of the I type half turn winding of leakage-adjustable inductance according to claim 1, it is characterised in that: described every
A I type winding is the rectified pipe ground connection in one end, and one end is grounded through filter capacitor, specifically:
W1 upper port is grounded through capacitor C1 in vice-side winding, the rectified pipe D3 ground connection of lower port；W2 upper port passes through in vice-side winding
Rectifying tube D1 ground connection, lower port are grounded through capacitor C3；W3 upper port is grounded through capacitor C2 in vice-side winding, the rectified pipe of lower port
D4 ground connection；The rectified pipe D1 ground connection of W4 upper port, lower port are grounded through capacitor C4 in vice-side winding；Wherein W1, W3 upper port and
W2, W4 lower port parallel connection are as anode output.
3. the flat surface transformer of the I type half turn winding of leakage-adjustable inductance according to claim 1, it is characterised in that: described every
A I type winding is that the rectified pipe in one end connects output, and one end connects output through filter capacitor, specifically:
W1 upper port connects output end through capacitor 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 capacitor C3；W3 upper port connects through capacitor C2 in vice-side winding
Output end, the rectified pipe D4 of lower port connect output end；The rectified pipe D1 of W4 upper port connects output end, lower port warp in vice-side winding
Capacitor 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 winding of leakage-adjustable inductance according to claim 1, it is characterised in that: described to change
Umber of turn distribution is on change side column, center pillar to adjust leakage inductance size specifically: increase by a circle center pillar winding, it is corresponding to reduce by two sides
Each circle of column winding, can guarantee that magnetizing inductance is constant while reducing leakage inductance；Increase each circle of two side column windings, corresponds in reducing
One circle of column winding, can guarantee and increase leakage inductance while magnetizing inductance is constant.
5. the flat surface transformer of the I type half turn winding of leakage-adjustable inductance according to claim 1, it is characterised in that: described whole
Flow tube is diode or controllable devices.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| CN107895636A CN107895636A (en) | 2018-04-10 |
| CN107895636B true CN107895636B (en) | 2019-05-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686538B (en) | 2018-12-11 | 2020-07-28 | 华为技术有限公司 | Transformer and power supply |
| CN111899976B (en) * | 2020-08-26 | 2024-06-25 | 福州大学 | Wide-range control method and structure for leakage inductance of transformer |
| CN115223782B (en) * | 2022-07-26 | 2024-07-16 | 西安交通大学 | Fractional turn planar transformer and converter |
Family Cites Families (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 |
| AU4926099A (en) * | 1998-08-21 | 2000-03-14 | Nucleus Ecopower Limited | Planar transformer |
| US6307458B1 (en) * | 1999-09-22 | 2001-10-23 | Ericsson Inc. | Split inductor with fractional turn of each winding and PCB including same |
| AU2003214528A1 (en) * | 2002-04-23 | 2003-11-10 | Koninklijke Philips Electronics N.V. | 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 |
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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 |