CN219040213U

CN219040213U - Three-phase balance high-frequency resonance half-bridge integrated transformer

Info

Publication number: CN219040213U
Application number: CN202223403718.4U
Authority: CN
Inventors: 魏彪; 高立松; 杨志全
Original assignee: Qingdao Jierui Kangda Electronics Co ltd
Current assignee: Qingdao Jierui Kangda Electronics Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-16
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a three-phase balanced high-frequency resonance half-bridge integrated transformer, which belongs to the technical field of transformers and comprises a butt-joint type magnetic core, wherein the butt-joint type magnetic core is formed by butt-joint of two identical half magnetic cores, three magnetic core center posts are arranged in each half magnetic core, a primary winding and two secondary windings are arranged on each magnetic core center post, and each secondary winding is formed by positively and negatively staggering a plurality of secondary winding sheets; the butt-joint type magnetic core is arranged on the base, three mounting grooves for primary windings are distributed on the base, and the primary windings are suspended without contacting the bottoms of the mounting grooves; the bottom of each mounting groove is provided with a first pin mounting hole and a second pin mounting hole for the pins of the secondary winding to pass through. Because a plurality of secondary winding sheets are arranged in a positive and negative staggered way, air can flow between pins below the secondary winding sheets in the heat dissipation process, heat is quickly taken away, and the heat dissipation of the integrally-mounted transformer is more efficient.

Description

Three-phase balance high-frequency resonance half-bridge integrated transformer

Technical field:

the utility model relates to the technical field of transformers, in particular to a three-phase balanced high-frequency resonant half-bridge integrated transformer.

The background technology is as follows:

with the development of high-power switching power supplies to high frequency, high power and high integration level of electronic circuits, the output voltage is adjustable, and higher requirements are put forward on transformers of direct current power supplies;

the traditional transformer has the defects that the transformer leakage inductance and the distributed capacitance are difficult to control the batch consistency and the installation volume, and the primary winding and the secondary winding are wound on the framework, so that the temperature of the magnetic core is inconvenient to emit, the secondary windings are in close contact with each other, air can not flow and dissipate heat, and great difficulty is brought to the actual batch production and debugging of the high-power direct current source; according to the situation, a designer needs to design a transformer which is wound without a framework, the primary winding and the secondary winding are tightly combined and a heat dissipation channel is reserved, so that leakage inductance of the transformer can be very low, consistency is good, efficiency is very high, and temperature rise is very low.

The utility model comprises the following steps:

in order to overcome the defects of the prior art, the utility model aims to provide a three-phase balanced high-frequency resonant half-bridge integrated transformer, which solves the problems that heat generated between a primary winding and a secondary winding is difficult to dissipate during integrated installation of the transformer, and the transformer is difficult to carry out multi-group integrated installation due to temperature limitation.

The technical scheme of the utility model is as follows:

the three-phase balanced high-frequency resonance half-bridge integrated transformer comprises a butt-joint type magnetic core, wherein the butt-joint type magnetic core is formed by butt-joint of two identical half magnetic cores, three magnetic core center posts are arranged in each half magnetic core at equal intervals, a primary winding and two secondary windings are arranged on each magnetic core center post, the primary winding is positioned between the two secondary windings, and each secondary winding is formed by positively and negatively staggering a plurality of secondary winding sheets;

the butt-joint type magnetic core is arranged on the base, three mounting grooves for primary windings are distributed on the base, and the primary windings are suspended without contacting the bottoms of the mounting grooves; each corner of each mounting groove is respectively provided with a supporting boss, and the bottom of each mounting groove is provided with a first pin mounting hole and a second pin mounting hole for a secondary winding pin to pass through.

Further, the secondary winding sheet main body is in a ring shape processed by a metal sheet, an eccentric opening is downwards arranged on the ring, and a first pin and a second pin are respectively arranged on the rings at two ends of the opening.

Further, the support boss up end is equipped with vertically and horizontally staggered's heat dissipation groove, and wherein horizontal heat dissipation groove one end or both ends extend to the support boss edge, and horizontal heat dissipation groove can supply the horizontal circulation of air, between two adjacent mounting grooves of intercommunication, and the below of butt joint magnetic core that the air can be convenient passes through, lets the butt joint magnetic core dispel the heat.

Further, the supporting boss outside is equipped with the limit baffle for the installation of butt joint type magnetic core, and distance between the baffle of base up end both sides is unanimous with the size of butt joint type magnetic core, and when the butt joint type magnetic core was installed on the base, just blocked by the baffle of base both sides, installation butt joint type magnetic core that can be convenient.

Further, the number of the second pin mounting holes is two, and the two second pin mounting holes form a row; the number of the first pin mounting holes is four, the four first pin mounting holes are divided into two rows, and the two rows are distributed on two sides of the second pin mounting hole.

Further, the four first pin mounting holes are distributed on two sides of the second pin mounting hole in a staggered mode.

Further, an integrally formed mounting part is arranged on one of the side plates of the base, the mounting part is in a groove body shape with an upward opening, a primary winding wiring hole is formed in the mounting part, and one wiring terminal of the primary winding penetrates through the wiring hole to be fixed to form a wiring pin.

The utility model has the advantages that:

1. according to the utility model, the secondary winding sheets of each secondary winding are formed by positive and negative staggered arrangement, and gaps are reserved between the first pins of the positive and negative staggered arrangement secondary winding sheets, so that heat nearby the primary winding and the secondary winding can be rapidly emitted, and through the staggered arrangement secondary winding sheets, a heat dissipation channel is reserved after the primary winding and the secondary winding are tightly combined, and the heat dissipation channel is matched with the base supported below the primary winding and the secondary winding, so that air can be rapidly circulated to emit heat.

2. The primary winding (the secondary winding and the primary winding) is tightly combined on the center post, so that leakage inductance of the primary winding (the secondary winding and the primary winding) is very low, and the working efficiency of the transformer can be improved.

3. Every two first pin mounting holes on the base are respectively positioned at two sides of each second pin mounting hole, an air circulation gap is reserved between the first pins, a secondary winding material is formed by adopting a copper foil covered with an insulating film, and a plurality of first pins can be used as cooling fins to quickly emit heat in the secondary winding.

Description of the drawings:

fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a side view of the present utility model.

Fig. 3 is a schematic structural view of a half core according to the present utility model.

Fig. 4 is a schematic view of the whole structure of the base of the present utility model.

Fig. 5 is a schematic top view of the base of the present utility model.

FIG. 6 is a schematic view of a secondary winding sheet of the present utility model

Reference numerals: 1. a base; 101. a mounting groove; 102. a first pin mounting hole; 103. a second pin mounting hole; 1-1, a mounting part; 1-2, supporting the boss; 1-201, a heat dissipation groove; 2. a butt-joint type magnetic core; 2-1, a half magnetic core; 2-2, a middle column; 3. a secondary winding; 3-1, secondary winding pieces; 3-11, a first pin; 3-12, a second pin; 4. a primary winding.

The specific embodiment is as follows:

the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

1-4, a three-phase balanced high-frequency resonance half-bridge integrated transformer comprises a butt-joint type magnetic core 2, wherein the butt-joint type magnetic core 2 is formed by butt-joint of two identical half magnetic cores 2-1, three magnetic core center posts 2-2 are arranged in each half magnetic core 2-1 at equal intervals, a primary winding 4 and two secondary windings 3 are arranged on each magnetic core center post 2-2, the primary winding 4 is positioned between the two secondary windings 3, and each secondary winding 3 is formed by positively and negatively staggered placement of a plurality of secondary winding sheets 3-1; the butt-joint type magnetic core 2 is a ferrite soft magnetic core, and is of the PQ138 type, and is formed by butt-jointing two PQ138 magnetic cores, and the butt-joint surface is bonded and fixed by using high-temperature bonding glue.

The butt-joint type magnetic core is arranged on the base 1, three mounting grooves 101 for primary windings are distributed on the base 1, and the primary windings 4 are suspended and do not contact the bottoms of the mounting grooves 101; each corner of each mounting groove 101 is respectively provided with a supporting boss 1-2, and the bottom of each mounting groove 101 is respectively provided with a first pin mounting hole and a second pin mounting hole for the pins (the first pins 3-11 and the second pins 3-12) of the secondary winding 3 to pass through.

In the utility model, a plurality of secondary windings 3 and primary windings 4 are integrally arranged and integrated into the same butt-joint type magnetic core 2, so that the PCB board of the power supply is better distributed, the flat integrated structure of the butt-joint type magnetic core 2 is more beneficial to cooling and radiating of wind, the power density is higher, the magnetic circuit is optimally designed, the power supply efficiency is higher, the three-phase staggering 120-degree work enables the ripple wave to be very small, the frequency is about 1/12 of that of the traditional power supply, and the resonant inductance is externally adjustable, so that the circuit is better designed. The current carrying capacity of the secondary copper foil is stronger, so that the power of the power supply can be larger, the utilization rate of a skeleton-free winding window is higher, the power density of the power supply is larger, and the leakage inductance of the primary winding (the secondary winding 3 and the primary winding 4) is tightly combined with the leakage inductance of the primary winding is lower and the efficiency is higher; meanwhile, as the secondary winding sheet 3-1 of each secondary winding 3 is formed by positive and negative staggered arrangement, gaps are reserved between the first pins 3-11 of the positive and negative staggered arrangement secondary winding sheet 3-1, and heat nearby the primary winding 4 and the secondary winding 3 can be rapidly dissipated.

Further, the main body of the secondary winding sheet 3-1 is in a ring shape processed by a metal sheet, an eccentric opening is downwards arranged on the ring, a first pin 3-11 and a second pin 3-12 are respectively arranged on the rings at two ends of the opening, the first pins 3-11 are arranged on the rings in a deflection mode, and a heat dissipation gap is reserved between the adjacent first pins 3-11 when the secondary winding sheet 3-1 is placed in a staggered mode.

Further, the upper end face of the supporting boss 1-2 is provided with crisscross radiating grooves 1201, wherein one end or two ends of the transverse radiating grooves 1201 extend to the edge of the supporting boss 1-2, the transverse radiating grooves 1-201 can be used for air to flow transversely and communicate between two adjacent mounting grooves 101, and air can conveniently pass through the lower part of the butt-joint magnetic core 2 to radiate heat of the butt-joint magnetic core 2; the support boss 1-2 outside is equipped with the limit baffle for the installation of butt joint type magnetic core 2, and the distance between the baffle of base 1 up end both sides is unanimous with the size of butt joint type magnetic core 2, and when butt joint type magnetic core 2 was installed on base 1, just blocked by the baffle of base 1 both sides, installation butt joint type magnetic core 2 that can be convenient.

Further, the number of the mounting holes of the second pins 3-12 is two, and the two mounting holes of the second pins 3-12 form a row; the number of the mounting holes of the first pins 3-11 is four, the four mounting holes of the first pins 3-11 are divided into two columns, and the two columns are distributed on two sides of the mounting holes of the second pins 3-12; the four first pin 3-11 mounting holes are distributed on two sides of the second pin 3-12 mounting hole in a staggered mode.

Further, an integrally formed mounting part 1-1 is arranged on one of the side plates of the base 1, the mounting part 1-1 is in a groove body shape with an upward opening, a wiring hole of the primary winding 4 is formed in the mounting part 1-1, and one wiring terminal of the primary winding 4 penetrates through the wiring hole to be fixed to form a wiring pin.

In addition, the primary winding 4 adopts litz wire or multi-strand three-layer insulated wire, the secondary winding 3 adopts insulating film coated copper foil or enamelled flat copper wire manufacturing or thick copper PCB technology, the primary winding 4 is led out by star connection, and the leading-out end is protected by sleeve.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a three-phase balance high frequency resonance half-bridge integrative transformer, includes butt joint formula magnetic core, and the butt joint formula magnetic core comprises two same half magnetic cores butt joints, and every inside equidistance arrangement of half magnetic core is provided with three magnetic core center pillar, all is equipped with primary winding, two secondary winding on every magnetic core center pillar, and primary winding is located between two secondary winding, its characterized in that: each secondary winding is formed by arranging a plurality of secondary winding sheets in a positive and negative staggered manner;

2. The three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 1, wherein the secondary winding sheet main body is in a ring shape processed by a metal sheet, an eccentric opening is downwards arranged on the ring, and a first pin and a second pin are respectively arranged on the rings at two ends of the opening.

3. The three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 1, wherein the upper end surface of the supporting boss is provided with criss-cross radiating grooves, and one or both ends of the transverse radiating grooves extend to the edge of the supporting boss.

4. A three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 1 or 3, wherein a limit baffle for installing a butt-joint type magnetic core is arranged on the outer side of the supporting boss.

5. The three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 1, wherein the number of the second pin mounting holes is two, and the two second pin mounting holes form a row; the number of the first pin mounting holes is four, the four first pin mounting holes are divided into two rows, and the two rows are distributed on two sides of the second pin mounting hole.

6. The three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 5, wherein the four first pin mounting holes are staggered on two sides of the second pin mounting hole.

7. The three-phase balanced high-frequency resonant half-bridge integrated transformer according to claim 1, wherein one side plate of the base is provided with an integrally formed mounting part, the mounting part is in a shape of an upward open slot, the mounting part is provided with a primary winding wiring hole, and one wiring terminal of the primary winding passes through the wiring hole to be fixed to form a wiring pin.