CN217280306U - Integrated magnetic component - Google Patents
Integrated magnetic component Download PDFInfo
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- CN217280306U CN217280306U CN202220837438.5U CN202220837438U CN217280306U CN 217280306 U CN217280306 U CN 217280306U CN 202220837438 U CN202220837438 U CN 202220837438U CN 217280306 U CN217280306 U CN 217280306U
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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
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Abstract
The utility model discloses an integrated magnetic component, which comprises a first inductor, a second inductor and a transformer; the integrated magnetic component is formed by the first inductor, the second inductor and the transformer, the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first shared magnetic circuit, so that the loss of a magnetic core of the shared magnetic circuit is reduced, the system efficiency is improved, meanwhile, the first shared magnetic circuit is formed on the first side of the transformer, the transformer and the first inductor share one magnetic circuit, the size of the integrated magnetic component is reduced, the cost is saved, the integrated magnetic component formed by the first inductor, the second inductor and the transformer is more convenient to intensively place, the system is more beneficial to air duct design and centralized heat dissipation, the common pins of three magnetic coils can be integrally processed, the number of the pins can be reduced by winding without breaking, PCB (printed circuit board) wiring resources are saved, and the integration level of the magnetic components is improved.
Description
Technical Field
The utility model relates to an electron device technical field especially relates to an integrated form magnetic components and parts.
Background
Magnetic components such as a transformer and an inductor in the switching power supply are used as core components of the switching power supply and mainly play roles in storing and transmitting electric energy, filtering and the like. With the continuous development of electronic technology, the demand for small size and high power density of the switching power supply in the industry is higher and higher at present. Therefore, higher requirements are put on the design and the type selection of the power supply structure and the device structure.
For example, in a phase-shifted full-bridge topology circuit, the circuit function can be realized only by arranging three magnetic components, namely a primary inductor, a main transformer and a secondary inductor. Therefore, the design quality of the magnetic component not only affects the overall size of the circuit, but also affects the efficiency, power density and stability of the switching power supply.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provided is an integrated magnetic component, which improves the integration level of the magnetic component.
In order to solve the technical problem, the utility model discloses a technical scheme be:
an integrated magnetic component comprises a first inductor, a second inductor and a transformer;
the first inductor and the second inductor are respectively arranged on two sides of the transformer;
the first inductor is arranged towards the transformer and is close to a first side of the transformer, and the first side forms a first common magnetic circuit;
the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first common magnetic path.
Further, the first inductor comprises a first magnetic core;
the transformer comprises a second magnetic core and a third magnetic core, wherein the second magnetic core and the third magnetic core are E-shaped magnetic cores; the second magnetic core and the third magnetic core are arranged oppositely;
the conducting wire on the first magnetic core is connected with the conducting wire on the second magnetic core.
Further, the core center leg of the second core and the core center leg of the third core are perpendicular to the opening direction of the first core;
one side of the second magnetic core close to the first magnetic core and one side of the third magnetic core close to the first magnetic core are the first sides;
the first magnetic core is a concave magnetic core, and the concave side faces the first side.
Further, the center leg of the second magnetic core and the center leg of the third magnetic core are parallel to the center leg of the first magnetic core, and the side of the second magnetic core close to the first magnetic core is the first side;
the first magnetic core is an 'E' -shaped magnetic core, and the convex side faces the first side.
Further, the second inductor comprises a fourth magnetic core;
the fourth magnetic core is arranged towards the transformer and is close to a second side of the transformer, and the second side forms a second common magnetic circuit;
one side of the third magnetic core close to the fourth magnetic core is the second side;
the direction of the magnetic flux generated by the fourth magnetic core is opposite to the direction of the magnetic flux generated by the transformer on the second common magnetic path.
Further, the second inductor comprises a fifth magnetic core and a sixth magnetic core;
the fifth magnetic core and the sixth magnetic core are arranged oppositely to form an independent magnetic loop;
and the conducting wire of the fifth magnetic core and the conducting wire of the sixth magnetic core are connected with the conducting wire of the transformer.
Further, the first magnetic core is an 'E' -shaped magnetic core;
the second inductor is formed by an E-shaped magnetic core;
the magnetic core center pillar of the first magnetic core, the magnetic core center pillar of the transformer and the magnetic core center pillar of the second inductor are all parallel to one another, and the dielectric resonator antenna is formed.
The beneficial effects of the utility model reside in that: the integrated magnetic component is formed by the first inductor, the second inductor and the transformer, the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first shared magnetic circuit, so that the loss of a magnetic core of the shared magnetic circuit is reduced, the system efficiency is improved, meanwhile, the first shared magnetic circuit is formed on the first side of the transformer, the transformer and the first inductor share one magnetic circuit, the size of the integrated magnetic component is reduced, the cost is saved, the integrated magnetic component formed by the first inductor, the second inductor and the transformer is more convenient to intensively place, the system is more beneficial to air duct design and centralized heat dissipation, the common pins of three magnetic coils can be integrally processed, the number of the pins can be reduced by winding without breaking, PCB (printed circuit board) wiring resources are saved, and the integration level of the magnetic components is improved.
Drawings
Fig. 1 is a schematic structural diagram of an integrated magnetic component in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a topological circuit configuration;
fig. 3 is a schematic structural diagram of another integrated magnetic component in an embodiment of the present invention;
FIG. 4 is a schematic wiring diagram corresponding to FIG. 2;
fig. 5 is a schematic diagram of an integrated structure of an integrated magnetic component in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another integrated magnetic component in an embodiment of the present invention;
FIG. 7 is a schematic diagram of another topology circuit configuration;
fig. 8 is a schematic structural diagram of another integrated magnetic component in an embodiment of the present invention;
description of reference numerals:
l1, a first inductor; l2, a second inductor; t1, transformer.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, an integrated magnetic component includes a first inductor, a second inductor and a transformer;
the first inductor and the second inductor are respectively arranged on two sides of the transformer;
the first inductor is arranged towards the transformer and is close to a first side of the transformer, and the first side forms a first common magnetic circuit;
the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first common magnetic path.
As can be seen from the above description, the utility model has the advantages that: the integrated magnetic component is formed by the first inductor, the second inductor and the transformer, the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first shared magnetic circuit, so that the loss of a magnetic core of the shared magnetic circuit is reduced, the system efficiency is improved, meanwhile, the first shared magnetic circuit is formed on the first side of the transformer, the transformer and the first inductor share one magnetic circuit, the size of the integrated magnetic component is reduced, the cost is saved, the integrated magnetic component formed by the first inductor, the second inductor and the transformer is more convenient to intensively place, the system is more beneficial to air duct design and centralized heat dissipation, the common pins of three magnetic coils can be integrally processed, the number of the pins can be reduced by winding without breaking, PCB (printed circuit board) wiring resources are saved, and the integration level of the magnetic components is improved.
Further, the first inductor comprises a first magnetic core;
the transformer comprises a second magnetic core and a third magnetic core, wherein the second magnetic core and the third magnetic core are E-shaped magnetic cores; the second magnetic core and the third magnetic core are arranged oppositely;
the conducting wire on the first magnetic core is connected with the conducting wire on the second magnetic core.
According to the description, the wire on the first magnetic core is connected with the wire on the second magnetic core, namely the wire on the first magnetic core and the wire on the second magnetic core form a public connecting line, so that the pin-out of the first magnetic core and the pin-out of the second magnetic core are respectively reduced, namely the original 4 pin-out are reduced to 2 pin-out, the PCB wiring resource and the production and processing cost are saved, and meanwhile, the parasitic parameter influence of distributed inductance, resistance and the like caused by PCB wiring is reduced.
Further, the core center pillars of the second and third cores are perpendicular to the opening direction of the first core;
one side of the second magnetic core close to the first magnetic core and one side of the third magnetic core close to the first magnetic core are the first sides;
the first magnetic core is a concave magnetic core, and the concave side faces the first side.
As apparent from the above description, by adopting the "E" shaped magnetic core as the first magnetic core, and the center leg of the second magnetic core and the center leg of the third magnetic core are parallel to the center leg of the first magnetic core, so that the first common magnetic path can be formed on the side of the second magnetic core close to the first magnetic core, which plays a role in improving the degree of integration.
As can be seen from the above description, by using the "concave" shaped magnetic core as the first magnetic core, and the center leg of the second magnetic core and the center leg of the third magnetic core are perpendicular to the opening direction of the first magnetic core, so that the first common magnetic path can be formed on the side of the second magnetic core close to the first magnetic core and the side of the third magnetic core close to the first magnetic core, which plays a role in improving the degree of integration.
Further, a core center pillar of the second core and a core center pillar of the third core are parallel to the core center pillar of the first core, and a side of the second core close to the first core is the first side;
the first magnetic core is an 'E' -shaped magnetic core, and the convex side faces the first side.
As apparent from the above description, by adopting the "E" shaped magnetic core as the first magnetic core, and the center leg of the second magnetic core and the center leg of the third magnetic core are parallel to the center leg of the first magnetic core, so that the first common magnetic path can be formed on the side of the second magnetic core close to the first magnetic core, which plays a role in improving the degree of integration.
Further, the second inductor comprises a fourth magnetic core;
the fourth magnetic core is arranged towards the transformer and is close to a second side of the transformer, and the second side forms a second common magnetic circuit;
one side of the third magnetic core close to the fourth magnetic core is the second side;
the direction of the magnetic flux generated by the fourth magnetic core is opposite to the direction of the magnetic flux generated by the transformer on the second common magnetic path.
As can be seen from the above description, by disposing the fourth magnetic core toward the transformer, and the second side of the transformer forms the second common magnetic path, the volume of the integrated magnetic component is further reduced; and when no public connecting line exists between the transformer and the second inductor, the integrated magnetic component can be used in a full-bridge rectification scheme of the switching power supply, and the practicability of the integrated magnetic component is improved while the integration level is improved.
Further, the second inductor comprises a fifth magnetic core and a sixth magnetic core;
the fifth magnetic core and the sixth magnetic core are arranged oppositely to form an independent magnetic loop;
and the conducting wire of the fifth magnetic core and the conducting wire of the sixth magnetic core are connected with the conducting wire of the transformer.
Known by the above description, through setting up fifth magnetic core and sixth magnetic core in opposite directions and forming independent magnetic circuit, and the wire of fifth magnetic core and the wire on the sixth magnetic core are connected with the wire on the transformer, have reduced the play foot of second inductance and transformer respectively, be about to original 4 play feet and reduce to 2 play feet, save PCB cloth board wiring resource and production and processing cost, reduced simultaneously because of the PCB walks parasitic parameter influences such as distributed inductance that the line leads to, resistance.
Further, the first magnetic core is an 'E' -shaped magnetic core;
the second inductor is formed by an E-shaped magnetic core;
and the magnetic core center pillar of the first magnetic core, the magnetic core center pillar of the transformer and the magnetic core center pillar of the second inductor are all parallel to one another.
It can be known from the above description that the magnetic core center pillar of the first magnetic core and the magnetic core center pillar of the second inductor of the magnetic core center pillar of the transformer are all parallel to each other, so that the winding or copper bar connection can be more conveniently carried out on the magnetic component.
In this embodiment, the integrated magnetic component can be applied to various switching power supply circuits, such as a phase-shifted full-bridge topology circuit and a topology circuit in which the secondary side is full-bridge rectification, and the following description is provided by specific embodiments:
referring to fig. 1, an integrated magnetic device includes a first inductor L1, a second inductor L2, and a transformer T1;
the first inductor L1 and the second inductor L2 are respectively arranged at two sides of the transformer T1; the first inductor L1 is disposed toward the transformer T1 and proximate to a first side of the transformer T1, the first side forming a first common magnetic path; the direction of the magnetic flux generated by the first inductor L1 is opposite to the direction of the magnetic flux generated by the transformer T1 on the first common magnetic path; wherein the first inductance L1 comprises a first magnetic core; the transformer T1 comprises a second magnetic core and a third magnetic core, and the second magnetic core and the third magnetic core are E-shaped magnetic cores; the second magnetic core and the third magnetic core are arranged oppositely;
referring to fig. 2 and 3, in an alternative embodiment, the integrated magnetic component is used in a phase-shifted full-bridge & current type push-pull bidirectional DCDC topology circuit; the first magnetic core only uses a half-pair PQ magnetic core (an E-shaped magnetic core), and a central column of the magnetic core is provided with an air gap to share a part of a magnetic core path with the transformer T1; the transformer T1 uses a pair of PQ magnetic cores, the center post of the magnetic core is provided with an air gap, and shares part of side post magnetic path with the first magnetic core; the second inductor L2 uses a pair of PQ magnetic cores, the center column of the magnetic core is provided with an air gap, and the magnetic cores are independent of magnetic circuits; the PQ core used in this example is also applicable to other E-shaped core shapes;
the magnetic core middle column of the second magnetic core and the magnetic core middle column of the third magnetic core are parallel to the magnetic core middle column of the first magnetic core, and one side of the second magnetic core close to the first magnetic core is the first side; namely the first magnetThe center leg of the core, the center leg of the transformer T1 and the center leg of the second inductor L2 are all parallel to each other; and the conductor of the fifth core and the conductor of the sixth core are connected to the conductor of the transformer T1, i.e. the coil N L2 And coil N S1 And a coil N S2 The middle drawer is connected; the conductor on the first core being connected to the conductor on the second core, i.e. coil N L1 And coil N p1 Connecting; the side of the first magnetic core protrusion faces the first side;
referring to fig. 4, x1 is a common connection conductor of a winding pin between the first inductor L1 and the transformer T1, and x2 is a common connection conductor of a winding pin between the second inductor L2 and the transformer T1; the primary sides of the first inductor L1 and the transformer T1 are high-side-pressure copper wire windings, and x1 is connected with a coil N L1 /N P1 /N P2 Winding the same wire continuously; the secondary side of the transformer T1 and the winding of the second inductor L2 are low-voltage side copper bar windings, so that x2 is connected with each other by copper bar welding, and the high-current capacity of the low-voltage side is ensured; referring to fig. 5, compared with the discrete magnetic component, the number of pins of the integrated magnetic component is reduced by 4, and the total number of pins of the discrete component is changed from 10 to 6, so that the wiring resources and the production and processing costs of the PCB wiring board are saved, and the influence of parasitic parameters such as distributed inductance and resistance caused by PCB wiring is reduced;
the corresponding flux principle is as follows:
for the first inductor L1, if the coil current is I P Then through the coil N L1 The generated magnetic flux is phi 1; for the second core of the transformer T1, coil N P1 Current is I P Then through the coil N P1 And a coil N P2 The generated magnetic flux phi 2; in a magnetic circuit shared by the first inductor L1 and the transformer T1, phi 1 and phi 2 have opposite signs and cancel each other out by faraday's law of electromagnetic induction, and if total magnetic flux phi is phi 1-phi 2 and B is Ac (Ac is the cross-sectional area of the shared magnetic circuit), B is phi/Ac in the shared magnetic circuit and Δ B is Δ phi/Ac, then it is known that Δ B is smaller and the core loss of the shared magnetic circuit is also smaller, thereby improving the system efficiency;
referring to fig. 6, in an alternative embodiment, the first magnetic core is a concave magnetic core; the magnetic core center pillars of the second magnetic core and the third magnetic core are perpendicular to the opening direction of the first magnetic core; one side of the second magnetic core close to the first magnetic core and one side of the third magnetic core close to the first magnetic core are the first sides; the first magnetic core is sunken on one side facing to the first side; the center pillar of the transformer T1 is changed from horizontal to vertical, so that the side of the transformer T1 close to the first inductor L1 can cooperate with the first inductor L1 to generate magnetic flux in only a single direction, and mutual magnetic flux cancellation effect is achieved;
referring to fig. 7 and 8, in an alternative embodiment, the integrated magnetic component is used in a phase-shifted full-bridge + full-bridge rectification bidirectional DCDC topology circuit; in the circuit, the first inductor L1 and the transformer T1 share a magnetic circuit 1 and have a common connection of windings, while the second inductor L2 and the transformer T1 do not have a common connection, but because the secondary side current direction is the same in each working period, the second inductor L2 and the transformer T1 share a magnetic circuit 2, and a magnetic circuit integrated scheme transformer T1 no-center-drawing structure can also be completed; specifically, the second inductor L2 includes a fourth magnetic core, which is an E-shaped magnetic core; the fourth magnetic core is disposed toward the transformer T1 and proximate to a second side of the transformer T1, the second side forming a second common magnetic path; one side of the third magnetic core close to the fourth magnetic core is the second side; the direction of the magnetic flux generated by the fourth magnetic core is opposite to that of the magnetic flux generated by the transformer T1 on the second common magnetic path, so that the magnetic fluxes are mutually counteracted; therefore, for different topological modes of secondary side rectification networks (full-wave rectification and full-bridge rectification), the implementation can be realized by using the same magnetic circuit integration scheme, the preset effect is met, and the integrated magnetic component has certain universality.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (7)
1. An integrated magnetic component is characterized by comprising a first inductor, a second inductor and a transformer;
the first inductor and the second inductor are respectively arranged on two sides of the transformer;
the first inductor is arranged towards the transformer and is close to a first side of the transformer, and the first side forms a first common magnetic circuit;
the direction of the magnetic flux generated by the first inductor is opposite to the direction of the magnetic flux generated by the transformer on the first common magnetic path.
2. An integrated magnetic component as claimed in claim 1, wherein the first inductor comprises a first core;
the transformer comprises a second magnetic core and a third magnetic core, and the second magnetic core and the third magnetic core are E-shaped magnetic cores; the second magnetic core and the third magnetic core are arranged oppositely;
the conducting wire on the first magnetic core is connected with the conducting wire on the second magnetic core.
3. An integrated magnetic component as claimed in claim 2, wherein the leg of the second core and the leg of the third core are perpendicular to the opening of the first core;
one side of the second magnetic core close to the first magnetic core and one side of the third magnetic core close to the first magnetic core are the first sides;
the first magnetic core is a concave magnetic core, and the concave side faces the first side.
4. An integrated magnetic component as claimed in claim 2, wherein the legs of the second and third magnetic cores are parallel to the leg of the first magnetic core, and the side of the second magnetic core adjacent to the first magnetic core is the first side;
the first magnetic core is an 'E' -shaped magnetic core, and the convex side faces the first side.
5. An integrated magnetic component as claimed in claim 4, wherein the second inductor comprises a fourth core;
the fourth magnetic core is arranged towards the transformer and is close to a second side of the transformer, and the second side forms a second common magnetic circuit;
one side of the third magnetic core close to the fourth magnetic core is the second side;
the direction of the magnetic flux generated by the fourth magnetic core is opposite to the direction of the magnetic flux generated by the transformer on the second common magnetic path.
6. An integrated magnetic component as claimed in claim 2, wherein the second inductor comprises a fifth core and a sixth core;
the fifth magnetic core and the sixth magnetic core are arranged oppositely to form an independent magnetic loop;
and the conducting wire of the fifth magnetic core and the conducting wire of the sixth magnetic core are connected with the conducting wire of the transformer.
7. An integrated magnetic component as claimed in claim 5 or 6, wherein the first core is an "E" shaped core;
the second inductor is composed of an E-shaped magnetic core;
the magnetic core center pillar of the first magnetic core, the magnetic core center pillar of the transformer and the magnetic core center pillar of the second inductor are all parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220837438.5U CN217280306U (en) | 2022-04-12 | 2022-04-12 | Integrated magnetic component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220837438.5U CN217280306U (en) | 2022-04-12 | 2022-04-12 | Integrated magnetic component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280306U true CN217280306U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220837438.5U Active CN217280306U (en) | 2022-04-12 | 2022-04-12 | Integrated magnetic component |
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| CN (1) | CN217280306U (en) |
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2022
- 2022-04-12 CN CN202220837438.5U patent/CN217280306U/en active Active
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