CN109473261B - Magnetic integration device of planar transformer and inductor - Google Patents
Magnetic integration device of planar transformer and inductor Download PDFInfo
- Publication number
- CN109473261B CN109473261B CN201811272930.7A CN201811272930A CN109473261B CN 109473261 B CN109473261 B CN 109473261B CN 201811272930 A CN201811272930 A CN 201811272930A CN 109473261 B CN109473261 B CN 109473261B
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- Prior art keywords
- winding
- inductor
- planar
- loop
- primary loop
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a magnetic integration device of a planar transformer and an inductor, which comprises: the magnetic core is provided with two circuit board windings which are arranged oppositely, the two circuit board windings and the discrete winding are coupled together through the magnetic core, the two circuit boards belong to a primary loop and a secondary loop respectively, the two circuit boards are insulated with each other and only have magnetic coupling, and the circuit boards are electrically connected with the switch pipe group.
Description
Technical Field
The invention relates to a magnetic integration device of a planar transformer and an inductor.
Background
The existing vehicle-mounted charger and vehicle-mounted direct current converter both adopt LLC and phase-shifted full-bridge modes, and both LLC and phase-shifted full-bridge modes need to adopt a transformer, an excitation inductor and a resonance inductor.
In view of the above-mentioned drawbacks, the present inventors have made active research and innovation to create a magnetic integrated device of planar transformer and inductor, so that the device has more industrial utility value.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a planar transformer and an inductor apparatus that integrate a planar transformer and a planar inductor, greatly simplify the volume of magnetic integration, have the advantages of stable inductance value, easy control of coupling degree, and the like, and take into account the assembly process and heat dissipation.
The invention relates to a magnetic integration device of a planar transformer and an inductor, which comprises: the magnetic core is provided with a first circuit board (1) and a second circuit board (2) which are arranged oppositely, the first circuit board (1) is provided with a first planar winding (4), the second circuit board (2) is provided with a second planar winding (5), the magnetic core is also provided with a discrete winding (6) or a third planar winding, the first planar winding, the second planar winding and the discrete winding respectively form a transformer and an excitation inductor (according to practical scenes, one of the planar windings and the discrete winding form a primary loop and a secondary loop of the transformer, the other planar winding forms the excitation inductor or a resonance inductor, or the two planar windings form the transformer, the discrete winding forms the excitation inductor or the resonance inductor, the two windings forming the transformer belong to the primary loop and the secondary loop and are mutually insulated, only magnetic coupling; meanwhile, the switch tube group of the primary loop and the primary loop winding form the primary loop.
The second planar winding (5) is a P1 winding, two ends of the second planar winding are connected with a switch tube group (Q1-Q4) of a primary loop through a capacitor C2 and an inductor L1 to form the primary loop, the discrete winding (6) is a resonant inductor L1, the first planar winding (4) is an S1+ S2 winding, the two windings form a secondary loop, and the primary loop and the secondary loop are mutually insulated and are magnetically coupled only through magnetism. Or: the split winding (6) is used as a P1 winding of a primary loop, the split winding is connected with a switch tube group (Q1-Q4) through a resonance inductor L1 and a resonance capacitor C2 to form the primary loop, the second plane winding (5) forms a resonance inductor L1, the first plane winding (4) forms an S1+ S2 winding loop, and similarly, the primary loop and the secondary loop are mutually insulated and only work through magnetic coupling of a magnetic core; the switching tubes Q5 and Q6 are switching tube groups of a secondary circuit, and are arranged on the first circuit board (1).
Further, magnetic core and switch nest of tubes are through the heat dissipation base heat dissipation, and switch tube and magnetic core all set up on the heat dissipation base.
By the scheme, the magnetic integration device of the planar transformer and the inductor at least has the following advantages:
1. the product volume is reduced, and the product size is reduced under the condition of not increasing the product height by overlapping the two circuit boards
2. The heat dissipation effect is good, the switch tube and the magnetic core are close to the heat dissipation base, and the thermal resistance is small
3. The product is stable and reliable, the product has good heat dissipation effect and small temperature rise, thereby being stable and reliable
4. The product is safe and insulating, and the primary loop and the secondary loop of the product are effectively isolated and insulated, so that the safety is good.
5. The price is reduced, the magnetic integration combines the transformer and the inductor into a product, and one inductor is saved, so the cost can be reduced
6. The coupling degree is easy to adjust, the parameters of the inductor and the transformer are stable, and the problem that the inductance is changed due to the change of the position of the winding during magnetic integration is effectively solved, so that the product is stable and reliable.
7. The efficiency is high, the product thermal resistance is small, the temperature of components can be conveniently controlled in a temperature range of high-efficiency work, and the efficiency is high.
8. The electromagnetic compatibility can be improved, and the conduction path of the switching noise generated by the switching tube group of the primary loop is cut off in a magnetic coupling mode, so that the electromagnetic compatibility can be improved.
9. The modularization is easy to realize, and many power supply topologies have the circuit unit, so that the modularization can be realized.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a planar transformer and inductor magnetic integration device according to the present invention;
FIG. 2 is a schematic diagram of FIG. 1;
FIG. 3 is a further variation of FIG. 2;
fig. 4 is another modification of fig. 2.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 2, a preferred embodiment of the magnetic integrated device of a planar transformer and an inductor according to the present invention comprises: the magnetic core is provided with a first circuit board 1 and a second circuit board 2 which are opposite, a first planar winding 4 is distributed on the first circuit board 1, a second planar winding 5 is distributed on the second circuit board 2, a discrete winding 6 or a third planar winding is further distributed on the magnetic core, the first planar winding, the second planar winding and the discrete winding respectively form a transformer and an excitation inductor, according to practical scenes, one of the planar windings and the discrete winding form a primary loop and a secondary loop of the transformer, the other planar winding forms the excitation inductor or a resonance inductor, or the two planar windings form the transformer, the discrete winding forms the excitation inductor or the resonance inductor, the two windings forming the transformer belong to the primary loop and the secondary loop, and are insulated with each other and only have magnetic coupling; meanwhile, the switch tube group of the primary loop and the primary loop winding form the primary loop.
The second planar winding 5 is a P1 winding in fig. 2, two ends of the second planar winding are connected with a switch tube group Q1-Q4 of a primary loop through a capacitor C2 and an inductor L1 to form the primary loop, the discrete winding 6 is a resonant inductor L1 in fig. 2, the first planar winding 4 is an S1+ S2 winding in fig. 2, the two windings form a secondary loop, and the primary loop and the secondary loop are insulated from each other and are magnetically coupled only through magnetism. Or:
the discrete winding 6 is used as a P1 winding of a primary loop, and is connected with the switch tube group Q1-Q4 through a resonance inductor L1 and a resonance capacitor C2 to form the primary loop, the second plane winding 5 forms a resonance inductor L1, the first plane winding 4 forms an S1+ S2 winding loop in the figure 2, and similarly, the primary loop and the secondary loop are mutually insulated and work only through the magnetic coupling of a magnetic core; the switching tubes Q5 and Q6 are switching tube groups of the secondary circuit, and are arranged on the first circuit board 1.
This embodiment, magnetic core and switch tube dispel the heat through heat dissipation base 9, and heat dissipation base is all pressed close to switch tube and magnetic core. Therefore, the heat dissipation path of the main power device is greatly shortened, and the thermal resistance is reduced. The two circuit board windings and the discrete winding are coupled together through the magnetic core, and the two circuit boards can be connected without an additional connector. In principle, the two circuit boards are coupled by magnetic coupling to realize power conversion, but in some cases, for example, current and voltage of output needs to be monitored, and in this case, the two circuit boards need to be electrically connected through connectors.
The invention has the advantages of small product volume, good heat dissipation, reliable product and the like.
In fig. 2, the dotted line part is a component and a structure according to the present invention.
Q1-Q4 are the switch tube groups mentioned above
P1 is reference numeral 5 in FIG. 1, i.e. a second planar winding
S1 and S2 are reference numeral 4 in FIG. 1, i.e. the first planar winding
L1 is reference numeral 6 in fig. 1, i.e. a discrete winding.
Of course, the specific design is not limited to this, and for example, L1 may be the planar winding #1, and P1 may be a discrete winding. As shown in fig. 3 and 4.
As shown in FIG. 3, the discrete winding can be used as an excitation inductor L1/L2, or as a resonant inductor L3/L4, which is not shown in FIG. 3. Similarly, the discrete winding may be P1 as the primary loop, the second planar winding (5) may be the excitation inductance L1/L2, or the second planar winding (5) may be the resonance inductance L3/L4, which is not shown in fig. 4. In summary, 3 windings are integrated on one magnetic core, and the role of each winding can be flexibly adjusted according to actual requirements.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A magnetic integration device of a planar transformer and an inductor is characterized by comprising: a magnetic core, wherein the magnetic core is provided with a first circuit board (1) and a second circuit board (2) which are arranged oppositely, a first planar winding (4) is distributed on the first circuit board (1), a second planar winding (5) is distributed on the second circuit board (2), the magnetic core is also provided with a discrete winding (6) or a third plane winding, the first plane winding, the second plane winding and the discrete winding respectively form a transformer and an excitation inductor, according to a practical scene, one of the planar windings and the discrete winding form a primary loop and a secondary loop of the transformer, the other planar winding forms an excitation inductor or a resonance inductor, the two planar windings form the transformer, the discrete winding forms the excitation inductor or the resonance inductor, the two windings forming the transformer belong to the primary loop and the secondary loop, the two windings are insulated with each other and only have magnetic coupling; meanwhile, a switch tube group of the primary loop and a primary loop winding form the primary loop; the second planar winding (5) is a P1 winding, two ends of the second planar winding are connected with a switch tube group Q1-Q4 of a primary loop through a capacitor C2 and an inductor L1 to form the primary loop, the discrete winding (6) is a resonant inductor L1, the first planar winding (4) is an S1+ S2 winding, the two windings form a secondary loop, the primary loop and the secondary loop are mutually insulated and are magnetically coupled only through magnetism; or: the split winding (6) is used as a P1 winding of a primary loop, and is connected with the switch tube group Q1-Q4 through a resonance inductor L1 and a resonance capacitor C2 to form the primary loop, the second plane winding (5) forms a resonance inductor L1, the first plane winding (4) forms an S1+ S2 winding loop, and similarly, the primary loop and the secondary loop are mutually insulated and only work through the magnetic coupling of a magnetic core; the switching tube Q5 and the switching tube Q6 are switching tube groups of a secondary circuit and are arranged on the first circuit board (1);
the magnetic core and the switch tube group are cooled through the heat dissipation base, and the switch tube and the magnetic core are arranged on the heat dissipation base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811272930.7A CN109473261B (en) | 2018-10-30 | 2018-10-30 | Magnetic integration device of planar transformer and inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811272930.7A CN109473261B (en) | 2018-10-30 | 2018-10-30 | Magnetic integration device of planar transformer and inductor |
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| Publication Number | Publication Date |
|---|---|
| CN109473261A CN109473261A (en) | 2019-03-15 |
| CN109473261B true CN109473261B (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811272930.7A Active CN109473261B (en) | 2018-10-30 | 2018-10-30 | Magnetic integration device of planar transformer and inductor |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233680A (en) * | 2018-01-30 | 2018-06-29 | 湘潭大学 | A kind of passive element integrating device applied to CLCL controlled resonant converters |
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- 2018-10-30 CN CN201811272930.7A patent/CN109473261B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233680A (en) * | 2018-01-30 | 2018-06-29 | 湘潭大学 | A kind of passive element integrating device applied to CLCL controlled resonant converters |
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| CN109473261A (en) | 2019-03-15 |
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