CN211088058U - LL C transformer and LL C power supply - Google Patents
LL C transformer and LL C power supply Download PDFInfo
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- CN211088058U CN211088058U CN201922221168.6U CN201922221168U CN211088058U CN 211088058 U CN211088058 U CN 211088058U CN 201922221168 U CN201922221168 U CN 201922221168U CN 211088058 U CN211088058 U CN 211088058U
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Abstract
The utility model is suitable for an LL C power technical field provides a LL C transformer and LL C power, including the magnetic part, around locating the primary winding of magnetic part, the first secondary winding and the second secondary winding that the cover was located the magnetic part, first secondary winding and second secondary winding are respectively with the primary winding coupling, the center of connecting first secondary winding and second secondary winding is taken a percentage, and the cover is located the center and is taken a percentage and regard as the magnetic ring of resonance inductance, the utility model provides a LL C transformer is through taking a percentage at the center of connecting first secondary winding and second secondary winding and establish the magnetic ring with the cover, utilizes the magnetic ring as resonance inductance for the LL C power of using this LL C transformer need not to set up traditional resonance inductance by magnetic core and many coils constitution alone in addition, has reduced the occupation space of resonance inductance, makes things convenient for LL C power miniaturization, and has reduced the preparation degree of difficulty of resonance inductance, thereby has reduced manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of LL C power, especially, relate to a LL C transformer and LL C power.
Background
The design of a small-power LL C power supply within 300W generally needs a transformer to supplement a power supply topology so as to design a LL C power supply product with higher efficiency and smaller ripples, along with the continuous development of a LL C power supply towards a light and thin type, particularly for a color screen ultrathin power supply or other power supply products with particularly strict requirements on the size of the power supply, how to reduce the size of the LL C power supply is also an urgent problem to be solved nowadays.
In the prior art, the LL C power supply can work only by arranging a resonant inductor and a main transformer, the resonant inductor generally comprises a magnetic core and a plurality of coils wound on the magnetic core, the plurality of coils of the resonant inductor are connected with a primary winding of the main transformer in series, the magnetic core of the resonant inductor can meet the inductance of the primary winding of the main transformer by winding the plurality of coils, the magnetic core and the plurality of coils occupy a large space, so that the resonant inductor occupies a large space, the resonant inductor is complex to manufacture, and the production cost is high, meanwhile, the resonant inductor and the main transformer need to be respectively and independently arranged, the production cost is high, and the occupied space is large, therefore, the LL C power supply in the prior art has the problems of large occupied space due to the resonant inductor, being not beneficial to miniaturization of a LL C power supply, and high production cost due to the complex manufacture of the.
SUMMERY OF THE UTILITY MODEL
The utility model provides an LL C transformer aims at solving prior art's LL C power and has resonance inductance occupation space big, is unfavorable for LL C power miniaturization, and the complicated problem that leads to manufacturing cost high of resonance inductance preparation.
The utility model discloses a realize like this, a LL C transformer, include:
a magnetic member;
the primary winding is wound on the magnetic part;
the first secondary winding and the second secondary winding are sleeved on the magnetic part and are respectively coupled with the primary winding;
a center tap connecting the first secondary winding and the second secondary winding; and
and the magnetic ring is sleeved on the center tap and used as a resonant inductor.
Preferably, the LL C transformer further includes a first output winding sleeved on the magnetic member and coupled to the primary winding, and the first output winding is configured to output a first power supply voltage.
Preferably, the LL C transformer further includes a second output winding sleeved on the magnetic member and coupled to the primary winding, and the second output winding is configured to output a second power supply voltage.
Preferably, the first output winding and the second output winding are integrated inside a PCB board at the same time.
Preferably, the magnetic member includes a first magnetic core and a second magnetic core that are separated from each other, and the first magnetic core and the second magnetic core are covered with each other; the first magnetic core or the second magnetic core is provided with a magnetic column, and the primary winding, the first secondary winding and the second secondary winding are arranged between the first magnetic core and the second magnetic core and sleeved on the magnetic column.
Preferably, the magnetic ring is made of sendust or ferrosilicon.
Preferably, the primary winding is formed by winding three layers of insulated wires, the first secondary winding and the second secondary winding are both copper sheets with surfaces covered with insulating films, and the primary winding is arranged between the first secondary winding and the second secondary winding.
The utility model discloses still provide an LL C power, use foretell LL C transformer.
The utility model provides an LL C transformer is through taking out the cover and establishing the magnetic ring on connecting first secondary winding and second secondary winding center, utilize the magnetic ring as resonance inductance, make the LL C power of using this LL C transformer need not to set up traditional resonance inductance of constituteing by magnetic core and many coils in addition alone, the electric elements quantity has been reduced, and need not coiling many coils, the occupation space of resonance inductance has been reduced, conveniently use the miniaturization of LL C power of this LL C transformer, and the magnetic ring is taken a percentage with the center and is assembled simply, the preparation degree of difficulty of resonance inductance has been reduced, thereby manufacturing cost is reduced, and simultaneously, through the magnetic ring integration setting inside LL C transformer that will be as resonance inductance, the packaging area of the LL C power of using this LL C transformer has been reduced greatly.
Drawings
Fig. 1 is a perspective structural view of an LL C transformer according to an embodiment of the present invention;
fig. 2 is an exploded perspective view of an LL C transformer according to an embodiment of the present invention;
fig. 3 is a schematic top view of an LL C transformer according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is a schematic circuit diagram of an LL C transformer according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides an LL C transformer is through taking out the cover and establishing the magnetic ring on connecting first secondary winding and second secondary winding center, utilize the magnetic ring as resonance inductance, make the LL C power of using this LL C transformer need not to set up traditional resonance inductance of constituteing by magnetic core and many circles of coil in addition alone, the electric elements quantity has been reduced, and need not the many circles of coil of coiling, the occupation space of resonance inductance has been reduced, conveniently use the miniaturization of the LL C power of this LL C transformer, and the magnetic ring is simple with the center equipment of taking a percentage, resonance inductance simple manufacture is convenient, the preparation degree of difficulty of resonance inductance has been reduced, and the production cost is reduced.
Referring to fig. 1 to 4, an LL C transformer according to an embodiment of the present invention includes a magnetic member 10, a primary winding N1 wound around the magnetic member 10, a first secondary winding N21 and a second secondary winding N22 sleeved on the magnetic member 10, the first secondary winding N21 and the second secondary winding N22 being coupled to the primary winding N1, a center tap 7 connecting the first secondary winding N21 and the second secondary winding N22, and a magnetic ring L sleeved on the center tap 7 and serving as a resonant inductor.
Referring to fig. 5, in the embodiment of the present invention, the primary winding N1, the first secondary winding N21, and the second secondary winding N22 are coupled to form a main transformer through the magnetic member 10, and the magnetic ring L is used as a resonant inductor to cooperate with the main transformer to adjust the resonant inductance of the main transformer.
The utility model discloses a LL C transformer is through establish magnetic ring L at the center tap 7 cover, utilize magnetic ring L0 as resonance inductance in order to adjust the resonance inductance volume of main transformer, because L1L 2C transformer utilizes magnetic ring L as resonance inductance, consequently the L4C power of using this L3C transformer need not to set up traditional resonance inductance by magnetic core and many circles coil constitution in addition alone, adopt magnetic ring L directly as resonance inductance, the electric elements quantity has been reduced, the occupation space of resonance inductance has been reduced, the miniaturization of LL C power of conveniently using this L5C transformer, because magnetic ring L processes simply, need not to coil many circles coil, directly establish magnetic ring L cover on center tap 7 and can be regarded as resonance inductance, magnetic ring L and the center tap 7 equipment are simple, the preparation degree of difficulty of resonance inductance has been reduced, thereby manufacturing cost has been reduced, and, resonance inductance integration sets up inside LL C transformer, the encapsulation area of the LL C power of using this LL C transformer has been reduced greatly.
The embodiment of the utility model provides an in, establish magnetic ring L of anti saturation intensity through the cover on 7 is taken a percentage at the center, utilize round magnetic ring L, alright be equivalent to traditional need the performance parameter that the many rings of coils of coiling could reach on the magnetic core, and traditional resonance inductance need adopt the magnetic core of cross-sectional area for about 60% of the magnetic core cross-sectional area of main transformer could realize resonance inductance's effect, cause extravagant a large amount of copper lines, and resonance inductance preparation degree of difficulty is big, and the utility model discloses in, take a percentage 7 covers at the center and establish round magnetic ring L, alright be equivalent to traditional needs the many rings of coils of coiling on the magnetic core, make resonance inductance occupation space little, and resonance inductance simple manufacture, make low in production cost, simultaneously, through 7 covers at the center of taking a percentage establish magnetic ring L can be as resonance inductance, need not to set up resonance inductance's magnetic core alone, reduced electric elements quantity, saved material cost and production man-hour cost, be particularly suitable for the application.
As an embodiment of the present invention, the magnetic ring L is made of sendust or sendust.
The embodiment of the utility model provides an in, establish the quantity of magnetic ring L on the center tap 7 or change the material of magnetic ring L through the increase and decrease cover, alright with the resonance inductance value of direct adjustment main transformer, resonance inductance value adjusts simple and conveniently.
As an embodiment of the present invention, the LL C transformer further includes a first output winding N3 disposed on the magnetic member 10 and coupled to the primary winding N1, and the first output winding N3 is used for outputting a first power supply voltage, in this embodiment, the first output winding N3 is coupled to the primary winding N1 through the magnetic member 10 to form a transformer, the first output winding N3 shares the magnetic member 10 with the main transformer, so that it is not necessary to separately set a transformer, the number of electrical components is reduced, the production cost is reduced, and the occupied space is reduced.
As an embodiment of the present invention, the LL C transformer further includes a second output winding N4 disposed on the magnetic member 10 and coupled to the primary winding N1, and the second output winding N4 is used for outputting a second power supply voltage.
In this embodiment, the second output winding N4 is coupled with the primary winding N1 through the magnetic element 10 to form a transformer, and the second output winding N4 shares the magnetic element 10 with the main transformer, so that a transformer does not need to be additionally and separately arranged to supply power to other electric devices, the number of electric elements is reduced, the production cost is reduced, and the occupied space is reduced.
As an embodiment of the present invention, the first output winding N3 and the second output winding N4 are integrated inside a PCB 12, and the first output winding N3 and the second output winding N4 are integrated inside the PCB 12, thereby facilitating the assembly of the LL C transformer.
In this embodiment, the center tap 7 is substantially U-shaped, the magnetic ring L is supported on the PCB 12, the center tap 7 simultaneously penetrates the first secondary winding N21 and the second secondary winding N22, and the center tap 7 penetrates the magnetic ring L and the PCB 12 to press the magnetic ring L against the PCB 12.
As an embodiment of the present invention, the magnetic member 10 includes a first magnetic core 101 and a second magnetic core 102 that are separated from each other, and the first magnetic core 101 and the second magnetic core 102 are covered with each other; the first magnetic core 101 or the second magnetic core 102 is provided with a magnetic pillar 103, and the primary winding N1, the first secondary winding N21 and the second secondary winding N22 are arranged between the first magnetic core 101 and the second magnetic core 101 and are sleeved on the magnetic pillar 103. The PCB 12 is sleeved on the magnetic pole 103, such that the first output winding N3 and the second output winding N4 are simultaneously sleeved on the magnetic pole 103. In this embodiment, the magnetic pillar 103 is disposed on the first magnetic core 101.
As an embodiment of the present invention, the primary winding N1 is formed by winding three-layer insulated wires, the first secondary winding N21 and the second secondary winding N22 are copper sheets with insulating films covering the surfaces, and the primary winding N1 is disposed between the first secondary winding N21 and the second secondary winding N22. Wherein the first secondary winding N21 and the second secondary winding N22 are connected by a center tap 7.
In this embodiment, the insulating film is disposed on the surface of the copper sheet to prevent the primary winding N1 from being shorted with the first secondary winding N21 and the second secondary winding N22. The primary winding N1 is arranged between the first secondary winding N21 and the second secondary winding N22, so that the leakage inductance of the main transformer is greatly reduced, the coupling performance of the primary winding N1, the first secondary winding N21 and the second secondary winding N22 of the main transformer is improved, and the leakage loss is low.
In the embodiment of the present invention, the PCB board 12 is provided with the input terminal 1 and the input terminal 4, and the input terminal 1 and the input terminal 4 are respectively connected to the primary winding N1. The PCB 12 is provided with an output terminal 5, an output terminal 9, an output terminal 2, an output terminal 3, an output terminal 6 and an output terminal 8, wherein the output terminal 5 and the output terminal 9 are respectively connected with a first secondary winding N21 and a second secondary winding N22, the output terminal 2 and the output terminal 3 are respectively connected with two ends of a first output winding N3, and the output terminal 6 and the input terminal 8 are respectively connected with two ends of a second output winding N4.
The utility model provides an LL C transformer is at the during operation, from input terminal 1 and input terminal 4 input alternating voltage, magnetic ring L cover is established and is taken a percentage 7 in the center in order to play resonant inductance's effect, alternating voltage inputs the primary winding N1 of main transformer, the first secondary winding N21 and the second secondary winding N22 of main transformer can produce corresponding induced voltage, output terminal 5, the rectifier circuit of external world is inserted respectively to the center tap 7 and output terminal 9, export for the power supply after the rectifier circuit rectification, and simultaneously, primary winding N1 and first output winding N3 electromagnetic induction effect, first output winding N3 produces induced voltage, first output winding N3 is from output terminal 2, output terminal 3 output first supply voltage, primary winding N1 and second output winding N4 electromagnetic induction effect, second output winding N4 produces induced voltage, second output winding N4 is from output terminal 6, output terminal 8 exports second supply voltage.
The utility model provides an LL C power, use the LL C transformer of above-mentioned embodiment because LL 0C transformer is established magnetic ring L at the center on taking a percentage 7 cover, utilize magnetic ring L as resonance inductance, with the resonance inductance value of adjustment main transformer, consequently LL C power need not to set up traditional resonance inductance by magnetic core and many coil group one-tenth in addition alone, the electric elements quantity has been reduced, resonance inductance's occupation space has been reduced, thereby make things convenient for LL C power's miniaturization, because magnetic ring L takes a percentage 7 with the center and assembles simply, resonance inductance's the preparation degree of difficulty has been reduced, make manufacturing cost have been reduced, and, will be as resonance inductance's magnetic ring L integration sets up inside LL C transformer, LL C power's packaging area has been reduced greatly.
The embodiment of the utility model provides an LL C transformer establishes the magnetic ring through taking out the cover at the center, utilize the magnetic ring as resonance inductance and main transformer cooperation work, with the resonance inductance volume of adjustment main transformer, thereby utilize the LL C power of this LL C transformer to need not to set up traditional resonance inductance by magnetic core and many rings of coil component in addition alone, the electric elements quantity has been reduced, the occupation space of resonance inductance has been reduced, conveniently use the miniaturization of LL C power of this LL C transformer, moreover, because magnetic ring processing is simple, the magnetic ring is taken a percentage with the center and is assembled simply, the preparation degree of difficulty of resonance inductance has been reduced, make manufacturing cost be reduced, and the resonance inductance is integrated to be set up inside LL C transformer, the packaging area of the LL C power of using this LL C transformer has been reduced greatly.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An LL C transformer, comprising:
a magnetic member;
the primary winding is wound on the magnetic part;
the first secondary winding and the second secondary winding are sleeved on the magnetic part and are respectively coupled with the primary winding;
a center tap connecting the first secondary winding and the second secondary winding; and
and the magnetic ring is sleeved on the center tap and used as a resonant inductor.
2. The LL C transformer of claim 1, wherein the LL C transformer further comprises a first output winding disposed around the magnetic element and coupled to the primary winding, the first output winding configured to output a first supply voltage.
3. The LL C transformer of claim 2, wherein the LL C transformer further comprises a second output winding disposed around the magnetic element and coupled to the primary winding, the second output winding configured to output a second supply voltage.
4. The LL C transformer of claim 3, wherein the first output winding and the second output winding are integrated simultaneously inside a PCB board.
5. The LL C transformer of claim 1, wherein the magnetic member comprises a first core and a second core that are separated from each other, the first core and the second core are covered with each other, the first core or the second core has a magnetic pillar, and the primary winding, the first secondary winding and the second secondary winding are disposed between the first core and the second core and are sleeved on the magnetic pillar.
6. The LL C transformer of claim 1, wherein the magnetic loop is made of sendust or sendust.
7. The LL C transformer of claim 1, wherein the primary winding is wound from three layers of insulated wire, the first and second secondary windings are copper sheets with surfaces covered with insulating film, and the primary winding is disposed between the first and second secondary windings.
8. An LL C power supply, characterized in that a LL C transformer according to any one of claims 1-7 is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922221168.6U CN211088058U (en) | 2019-12-11 | 2019-12-11 | LL C transformer and LL C power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922221168.6U CN211088058U (en) | 2019-12-11 | 2019-12-11 | LL C transformer and LL C power supply |
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| Publication Number | Publication Date |
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| CN211088058U true CN211088058U (en) | 2020-07-24 |
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| CN201922221168.6U Active CN211088058U (en) | 2019-12-11 | 2019-12-11 | LL C transformer and LL C power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112509789A (en) * | 2020-11-26 | 2021-03-16 | 东莞市大忠电子有限公司 | Magnetic device integrating transformer, inductor and mutual inductor |
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2019
- 2019-12-11 CN CN201922221168.6U patent/CN211088058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112509789A (en) * | 2020-11-26 | 2021-03-16 | 东莞市大忠电子有限公司 | Magnetic device integrating transformer, inductor and mutual inductor |
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