CN215417825U

CN215417825U - Horizontal inverter transformer

Info

Publication number: CN215417825U
Application number: CN202121857353.5U
Authority: CN
Inventors: 钱江
Original assignee: Wuxi Fule Electronics Co ltd
Current assignee: Wuxi Fule Electronics Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-01-04
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a horizontal inverter transformer which comprises an iron core, a high-voltage coil, a low-voltage coil, a base, a framework, air gap pads and a pressing plate, wherein the framework is of an annular structure, the iron core is arranged in an inner cavity of the framework in a penetrating mode, the iron core is supported and arranged on the base, the iron core is clamped and locked on the base through the pressing plate, the low-voltage coil is wound on an outer ring of the framework, the air gap pads are arranged on the outer ring of the low-voltage coil, two groups of air gap pads are symmetrically arranged on two sides of the low-voltage coil respectively, the high-voltage coil is wound on the outer side of the air gap pads, the high-voltage coil is arranged at a distance from the low-voltage coil through the air gap pads to form a heat dissipation cavity, the overall size of the horizontal inverter transformer is small, and efficient heat dissipation can be carried out on the inner coil and the outer coil.

Description

Horizontal inverter transformer

Technical Field

The utility model belongs to the field of transformers, and particularly relates to a horizontal inverter transformer.

Background

The inverter transformer is an important component of the isolated inverter, plays an important role in the efficiency, the working reliability and the output electrical performance of the inverter, and the design of a magnetic device is a key factor for the success of the development of the inverter.

There are two main types of magnetic devices used in high power inverters: 1. a high-frequency push-pull transformer; 2. industrial frequency transformer of full-bridge topology structure. In the application occasions where the inverter power supply of motor homes, yachts and the like needs high reliability, the high-frequency transformer is rarely applied due to the reasons of high switching frequency, insufficient reliability of thermal aging and the like, and the use of a power frequency transformer is continued all the time. The conventional industrial frequency transformer is designed and developed according to a linear industrial frequency power transformer, and generally has the characteristics of large volume, low efficiency, poor heat dissipation and the like.

Disclosure of Invention

The purpose of the utility model is as follows: in order to overcome the defects in the prior art, the utility model provides a horizontal inverter transformer which is small in overall size and can efficiently dissipate heat of inner and outer side coils.

The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the utility model is as follows:

the utility model provides a horizontal inverter transformer, includes iron core, high-pressure coil, low-voltage coil, base, skeleton, air gap pad and clamp plate, the skeleton is the loop configuration, the iron core is worn to establish in the inner chamber of skeleton, the iron core supports and sets up on the base, just the iron core passes through clamp plate centre gripping lock and attaches on the base, low-pressure coil is around establishing on the outer lane of skeleton, low-pressure coil's outer lane is provided with the air gap pad, and is two sets of air gap pad symmetry respectively sets up the both sides at low-pressure coil, the outside of air gap pad is around being equipped with high-pressure coil, high-pressure coil passes through air gap pad and low-pressure coil interval setting and constitutes the heat dissipation chamber.

Further, the air gap pad includes the backing plate and sets up filler strip on a backing plate lateral wall body, a plurality of groups the parallel interval of filler strip is arranged and is set up, the length direction of filler strip sets up along the axial of skeleton, and two liang of adjacent constitute heat dissipation channel between the filler strip.

Furthermore, a plurality of ventilation through holes are arranged on the plate body of the backing plate in a penetrating way.

Furthermore, the backing plate includes the transition arc board on the both sides arris wall on the perpendicular to filler strip length direction, the concave surface of transition arc board sets up towards low voltage coil.

Further, a temperature sensor is arranged on the air gap pad.

Furthermore, the air gap pad is made of an insulating material.

Further, the iron core is of a three-column core iron core structure, the middle column core of the iron core is arranged in the framework in a penetrating mode, the two outer column cores of the iron core are located on the outer side of the high-voltage coil, and an insulating plate is arranged between the high-voltage coil and the outer column cores.

Furthermore, an accommodating opening is formed in the base corresponding to the high-voltage coil in a penetrating mode.

Has the advantages that: the low-voltage coil is arranged on the inner side of the high-voltage coil, so that the whole volume can be reduced, the insulation distance to the ground can be increased, and the safety of the transformer can be improved. And a heat dissipation channel is formed between the high-voltage coil and the low-voltage coil, so that the low-voltage coil at the inner side can exchange heat with air, and the transformer can be efficiently dissipated.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a schematic perspective view of an air gap pad according to the present invention;

fig. 4 is an enlarged partial view of the temperature sensor of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, a horizontal inverter transformer, including iron core 1, high-voltage coil 2, low-voltage coil 3, base 4, skeleton 5, interior supporter and clamp plate 9, iron core 1 is the three-column core iron core structure of EI type, skeleton 5 is the loop configuration, iron core 1's center pillar core is worn to establish in the inner chamber of skeleton 5, iron core 1 supports and sets up on base 4, just iron core 1 passes through clamp plate 9 centre gripping lock and attaches on the base, and base 4 and clamp plate 9 contact respectively in iron core 1's upper and lower both sides wall, include two perforation that are used for wearing to establish screw rod 12 on clamp plate 9, all overlap on screw rod 12's the both ends and be equipped with insulating pad cover 10 and flat pad 11, and its screw thread end passes through nut 13 lock and attaches.

The low-voltage coil 3 is wound on the outer ring of the framework 5, the low-voltage coil 3 is wound by high-precision copper strips in three layers in an overlapping mode, the low-voltage coil is wound for a certain number of turns, for example, 7 turns, the layers are isolated by insulating paper, the width of the insulating paper exceeds the width of the copper strips, and the two sides of the insulating paper are about 3-5 mm. The utility model discloses a low voltage coil, including skeleton 5, high voltage coil 2, skeleton 5 is insulating material, if skeleton 5 adopts the insulating paper of 0.5mm thickness, like Nomex paper, the outer lane of low voltage coil 3 is provided with interior supporter, the outside of interior supporter is around being equipped with high voltage coil 2, and high voltage coil 2 adopts the enameled wire coiling that has high-strength to form, and the coiling is certain number of turns, like 112 circles.

The low-voltage coil sets up in high-voltage coil's inboard, can increase the insulation distance to the ground, reduces whole volume, high-voltage coil 2 sets up and constitutes annular heat dissipation chamber through interior supporter and 3 intervals of low-voltage coil, and the low and medium-voltage coil adopts copper strips body protrusion iron core directly to draw forth in this scheme, has improved maneuverability, and constitutes the heat dissipation passageway between high-voltage coil and the low-voltage coil for low-voltage coil that is located the iron core inside, high-voltage coil 2's inner circle also can carry out the heat exchange with the air, dispels the heat to the transformer with the efficient.

Interior supporter includes air gap pad 8, at least two sets of air gap pad 8 symmetry respectively sets up in the both sides of low voltage coil 3, air gap pad 8 is insulating material, like nylon pad etc. keeps the heat dissipation chamber through air gap pad.

As shown in fig. 2 and fig. 3, the air gap pad 8 includes a plate-shaped pad 20 and a plurality of pads 21 disposed on a sidewall of the pad 20, the pads 21 are disposed corresponding to the low voltage coil, a plurality of groups of the pads 21 are disposed in parallel at intervals, the length direction of the pads 21 is disposed along the axial direction of the frame 5, and two adjacent pads 21 form a heat dissipation channel 24 therebetween for dissipating heat from the inner sides of the low voltage coil and the high voltage coil. The filler strip 21 has also formed the strengthening rib structure, promotes the bulk strength of air gap pad 8, has also ensured the total height of air gap when constituting the air flue through the filler strip, has ensured the size of transformer leakage inductance, is favorable to the heat dissipation of transformer simultaneously, forms the air current, reduces the temperature of transformer.

The base plate 20 has a plurality of ventilation holes 22 formed through the plate body for improving heat dissipation efficiency and reducing magnetic induction loss. Backing plate 20 includes transition arc board 23 on the both sides arris wall on the perpendicular to filler strip 21 length direction, the concave surface of transition arc board 23 is towards setting up in low voltage coil 3, and the well post core of iron core 1 is the rectangular cylinder structure, and low voltage coil is rectangle annular structure, can carry out the radian direction to high voltage coil 2 through transition backplate 23, guarantees the wire winding quality.

As shown in fig. 4, a temperature sensor 14 is disposed on the air gap pad 8, and the stabilizing sensor 14 is disposed in the heat dissipation channel and used for detecting the temperature of the transformer, and under an extreme use condition, when the temperature rise of the transformer exceeds a design requirement, the transformer can be operated and stopped to protect the transformer, and after the temperature returns to normal, the transformer can be restored to work.

Iron core 1 is three post core iron core structures, the center pillar core of iron core 1 is worn to establish in skeleton 5, just two outer post cores of iron core 1 are located high voltage coil 2's the outside, be provided with insulation board 7 between high voltage coil 2 and the outer post core, through iron core and high voltage coil are kept apart to insulation board 7.

And an accommodating port 15 is formed in the base 4 corresponding to the high-voltage coil 2 in a penetrating manner and used for protruding to the pressing coil and the high-voltage coil outside the iron core.

The overall production and assembly installation sequence is as follows:

s1: a framework 5 is arranged on the winding shaft, and the joint is stuck and sealed by an adhesive tape;

s2: winding a low-voltage coil 3, inserting isolation insulation paper, fixing by using an adhesive tape, winding a copper strip to finish the low-voltage coil, isolating turns by using the insulation paper, wherein the width of the copper strip is smaller than that of the insulation paper, and a certain distance is reserved as a safety distance;

s3: an air gap pad 8 is respectively arranged on the upper side and the lower side of the low-voltage coil 3, a temperature sensor 14 is arranged in an air passage of the upper air gap pad, the upper air gap pad is fixed by an adhesive tape, and insulating paper is wrapped outside the upper air gap pad to form an air passage;

s4: then, the high-voltage coil 2 is wound, and the two sides of the high-voltage coil 2 are away from the steel sheet of the iron core 1 by a certain distance, such as 3-5mm, so that the effect of increasing the safety distance is achieved;

s5: inserting steel sheets forming the iron core 1 into the framework 5 in a crossed manner one by one, wherein no gap exists between the I strip and the E sheet, and the surface is smooth until the total thickness of the iron core 1 meets the specified requirement;

s6: the mounting bracket is fastened by a bolt 12, a flat pad 11, an insulating pad sleeve 10, a pressing plate 9, an iron core 1 and a base 5 through a nut 13, and terminals 6 with insulating sheaths are respectively mounted on lead-out wires of the high-voltage coil 2.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.

Claims

1. A horizontal inverter transformer is characterized in that: including iron core (1), high-voltage coil (2), low-voltage coil (3), base (4), skeleton (5), air gap pad (8) and clamp plate (9), skeleton (5) are the loop configuration, iron core (1) is worn to establish in the inner chamber of skeleton (5), iron core (1) supports and sets up on base (4), just iron core (1) attaches on the base through clamp plate (9) centre gripping lock, low-voltage coil (3) are around establishing on the outer lane of skeleton (5), the outer lane of low-voltage coil (3) is provided with air gap pad (8), and is two sets of air gap pad (8) symmetry respectively sets up the both sides at low-voltage coil (3), the outside of air gap pad (8) is around being equipped with high-voltage coil (2), high-voltage coil (2) set up and constitute the heat dissipation chamber through air gap pad (8) and low-voltage coil (3) interval.

2. The horizontal inverter transformer according to claim 1, wherein: air gap pad (8) are in including backing plate (20) and setting backing strip (21), a plurality of groups on backing plate (20) a lateral wall body backing strip (21) parallel interval arranges the setting, the axial setting of skeleton (5) is followed to the length direction of backing strip (21), and two liang of adjacent constitute heat dissipation channel (24) between backing strip (21).

3. The horizontal inverter transformer according to claim 2, wherein: the plate body of the backing plate (20) is provided with a plurality of ventilation through holes (22) in a penetrating way.

4. The horizontal inverter transformer according to claim 2, wherein: the backing plate (20) includes transition arc board (23) on the both sides arris wall on perpendicular to filler strip (21) length direction, the concave surface of transition arc board (23) sets up towards low voltage coil (3).

5. The horizontal inverter transformer according to claim 1, wherein: and a temperature sensor (14) is arranged on the air gap pad (8).

6. The horizontal inverter transformer according to claim 1, wherein: the air gap pad (8) is made of insulating materials.

7. The horizontal inverter transformer according to claim 1, wherein: iron core (1) is three post core iron core structures, the center pillar core of iron core (1) is worn to establish in skeleton (5), just two outer post cores of iron core (1) are located high-voltage coil's (2) the outside, be provided with between high-voltage coil (2) and the outer post core insulation board (7).

8. The horizontal inverter transformer according to claim 1, wherein: and the base (4) is provided with an accommodating port (15) corresponding to the high-voltage coil (2) in a through manner.