High-frequency high-voltage transformer

Abstract

The utility model discloses a high-frequency and high-voltage transformer, which comprises a first magnetic core, a second magnetic core, a third magnetic core and a fourth magnetic core, the second magnetic core is arranged opposite to the first magnetic core, and the second magnetic core comprises a second closed end, a third side arm and a fourth side arm; two opposite ends of the primary winding are respectively sleeved with the first side arm and the third side arm; the secondary winding is sleeved on the primary winding; two opposite ends of the first insulating fixing piece are respectively sleeved with the second side arm and the fourth side arm; wherein a shielding layer is arranged between the primary winding and the secondary winding, and the shielding layer is used for reducing the interference of the input of the primary winding on the output of the secondary winding. According to the high-frequency and high-voltage transformer, the shielding layer is arranged between the primary winding and the secondary winding, the shielding layer can shield interference from the primary winding, the influence on output of the secondary winding is reduced, the transformer can output stably, and good consistency between phases of the high-voltage transformer is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer structures, in particular to a high-frequency and high-voltage transformer. Background Art

[0002] High-voltage generators are core components of medical X-ray machines, industrial X-ray machines, CT and other devices, and are widely used. High-frequency high-voltage transformers are extremely critical components. Since the primary and secondary sides of high-frequency high-voltage transformers are relatively large, the distributed capacitance and leakage inductance of the transformer windings will usually increase sharply, resulting in poor consistency between phases of the high-frequency transformer. In addition, in high-power application scenarios, there will be certain invalid interference inputs on the primary input of the transformer, which will have a greater impact on the secondary output, resulting in unstable transformer output. Utility Model Content

[0003] The utility model aims to provide a high-frequency and high-voltage transformer to solve the problems in the prior art and improve the consistency between phases of the high-frequency transformer.

[0004] The utility model provides a high-frequency and high-voltage transformer, comprising:

[0005] A first magnetic core, comprising a first closed end and a first side arm and a second side arm extending from opposite ends of the first closed end along a first direction;

[0006] A second magnetic core, arranged opposite to the first magnetic core, the second magnetic core comprising a second closed end and a third side arm and a fourth side arm extending from two pairs of ends of the second closed end along the first direction;

[0007] A primary winding, wherein two opposite ends of the primary winding are respectively sleeved with the first side arm and the third side arm;

[0008] A secondary winding is sleeved on the primary winding;

[0009] A first insulating fixing member, wherein opposite ends of the first insulating fixing member are respectively sleeved with the second side arm and the fourth side arm;

[0010] Wherein: a shielding layer is provided between the primary winding and the secondary winding, and the shielding layer is used to reduce the interference of the input of the primary winding on the output of the secondary winding.

[0011] A high-frequency and high-voltage transformer as described above, wherein preferably, the shielding layer includes a lead wire and a layer of copper foil wound on the primary winding, one end of the lead wire is connected to the copper foil, and the other end of the lead wire is grounded.

[0012] In the high-frequency and high-voltage transformer as described above, preferably, the primary winding includes a second insulating fixture and a copper foil wound on the second insulating fixture.

[0013] In the high-frequency and high-voltage transformer as described above, preferably, both the first insulating fixing member and the second insulating fixing member are made of polycarbonate material, and both the first insulating fixing member and the second insulating fixing member are provided with a plurality of slots.

[0014] In the high-frequency and high-voltage transformer as described above, preferably, the secondary winding comprises a secondary bracket and an enameled wire, the secondary bracket is provided with a winding groove, and the enameled wire is wound in the winding groove.

[0015] As described above, in the high-frequency and high-voltage transformer, preferably, both the first magnetic core and the second magnetic core are UY magnetic cores.

[0016] Compared with the prior art, the high-frequency high-voltage transformer of the utility model is provided with a shielding layer between the primary winding and the secondary winding. In high-power application scenarios, the shielding layer can shield the interference from the primary winding and reduce the impact on the output of the secondary winding, so that the transformer can output stably, thereby ensuring good consistency between the phases of the high-voltage transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of a high-frequency and high-voltage transformer provided by an embodiment of the utility model;

[0018] Figure 2 It is an exploded diagram of a high-frequency and high-voltage transformer provided by an embodiment of the utility model;

[0019] Figure 3 It is a left view of the high-frequency high-voltage transformer provided by the embodiment of the utility model;

[0020] Figure 4 It is a front view of a high-frequency and high-voltage transformer provided by an embodiment of the utility model;

[0021] Figure 5 yes Figure 4 Sectional view along the AA direction;

[0022] Figure 6 yes Figure 4 Cross-sectional view along the BB direction.

[0023] Description of reference numerals:

[0024] 10-first magnetic core, 11-first closed end, 12-first side arm, 13-second side arm;

[0025] 20-second magnetic core, 21-second closed end, 22-third side arm, 23-fourth side arm;

[0026] 30-primary winding, 31-second insulating fixing member;

[0027] 40-secondary winding, 41-secondary support, 42-winding slot;

[0028] 50-shielding layer;

[0029] 60-first insulating fixing member;

[0030] D1 - First direction. DETAILED DESCRIPTION

[0031] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] Reference Figures 1 to 3 As shown, the utility model provides a high-frequency high-voltage transformer, including a first magnetic core 10, a second magnetic core 20, a primary winding 30, a secondary winding 40 and a first insulating fixing member 60, wherein:

[0033] The first magnetic core 10 includes a first closed end 11 , a first side arm 12 and a second side arm 13 , wherein the first side arm 12 and the second side arm 13 are symmetrically arranged at opposite ends of the first closed end 11 , and the first side arm 12 and the second side arm 13 extend along a first direction D1 , and the first direction D1 is perpendicular to the first closed end 11 .

[0034] The structure of the second magnetic core 20 is the same as that of the first magnetic core 10 . The second magnetic core 20 includes a second closed end 21 , a third side arm 22 and a fourth side arm 23 . The third side arm 22 and the fourth side arm 23 are symmetrically arranged at opposite ends of the second closed end 21 and are perpendicular to the second closed end 21 .

[0035] The opposite ends of the primary winding 30 are respectively connected to the first side arm 12 and the third side arm 22. Figure 2 as well as Figure 6 As shown, the first side arm 12 and the third side arm 22 are symmetrically sleeved on both ends of the primary winding 30 and extend into the primary winding 30. When the end of the first side arm 12 abuts against the end of the third side arm 22, the sleeve connection between the first side arm 12 and the third side arm 22 and the primary winding 30 is completed.

[0036] The secondary winding 40 is sleeved on the outside of the primary winding 30. In order to reduce the influence of the invalid interference input of the primary winding 30 on the output of the secondary winding 40, a shielding layer 50 is arranged between the primary winding 30 and the secondary winding 40. The shielding layer 50 reduces the influence of the invalid interference input. In the embodiment provided in the present application, the shielding layer 50 includes a lead wire (not shown in the figure) and a layer of copper foil (not shown in the figure) wound on the primary winding 30. One end of the lead wire is connected to the copper foil and the other end is grounded. The copper foil has a good electromagnetic shielding effect. A layer of copper foil is used to cover the outer periphery of the primary winding 30, and the copper foil is grounded by the lead wire. This can greatly block or reduce the influence of the invalid interference input of the primary winding 30 on the input of the secondary winding 40, thereby ensuring the stable output of the high-frequency and high-voltage transformer.

[0037] Reference Figure 2 as well as Figure 4 As shown, the opposite ends of the first insulating fixture 60 are respectively sleeved with the second side arm 13 and the fourth side arm 23, and the second side arm 13 and the fourth side arm 23 are symmetrically sleeved on the two ends of the first insulating fixture 60 and extend into the first insulating fixture 60. When the end of the second side arm 13 and the end of the fourth side arm 23 are abutted against each other, the sleeve connection between the second side arm 13 and the fourth side arm 23 and the first insulating fixture 60 is completed.

[0038] The sizes of the first side arm 12 , the second side arm 13 , the third side arm 22 , the fourth side arm 23 , the primary winding 30 and the first insulating fixing member 60 are adapted to each other to ensure the structural stability of the assembled high-frequency and high-voltage transformer.

[0039] In the embodiments provided in this application, refer to Figure 5 As shown, the primary winding 30 includes a second insulating fixture 31 and a copper foil (not shown) wound on the second insulating fixture 31. The high-frequency and high-voltage transformer of the present application can be used in high-power scenarios, and a winding structure in which the copper foil is wound on the second insulating fixture 31 is adopted, because the copper foil winding has good thermal conductivity and heat dissipation capacity, which is conducive to improving the reliability and stability of the high-frequency and high-voltage transformer.

[0040] In a feasible implementation, the first insulating fixture 60 and the second insulating fixture 31 have the same structure and are both made of polycarbonate material. The polycarbonate material has the characteristics of high strength, fatigue resistance, dimensional stability, and small creep, and has excellent insulation properties. It can still maintain stable electrical performance in a humid or high temperature environment. The first insulating fixture 60 and the second insulating fixture 31 made of polycarbonate material can further ensure the stability of the high-frequency high-voltage transformer. The first insulating fixture 60 and the second insulating fixture 31 are both provided with a plurality of slots (not shown in the figure) so that windings can be wound on the first insulating fixture 60 and the second insulating fixture 31.

[0041] Reference Figure 2 , Figure 4 as well as Figure 6 As shown, the secondary winding 40 includes a secondary bracket 41 and an enameled wire (not shown in the figure), and a winding groove 42 is provided on the secondary bracket 41, and the enameled wire is wound in the winding groove 42. The winding groove 42 is formed by rotating along the outer circumference of the secondary bracket 41 to facilitate the winding of the enameled wire. The winding areas of the primary winding 30 and the secondary winding 40 correspond to and are fixed, which is conducive to ensuring the symmetrical installation of the coil, thereby further improving the stability of the high-frequency and high-voltage transformer.

[0042] In the embodiment provided in the present application, the first magnetic core 10 and the second magnetic core 20 are both UY magnetic cores. The UY magnetic core can increase the equivalent excitation inductance and reduce the equivalent leakage inductance.

[0043] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A high frequency and high voltage transformer, characterized in that: include: A first magnetic core, comprising a first closed end and a first side arm and a second side arm extending from opposite ends of the first closed end along a first direction; A second magnetic core, arranged opposite to the first magnetic core, the second magnetic core comprising a second closed end and a third side arm and a fourth side arm extending from two pairs of ends of the second closed end along the first direction; A primary winding, wherein two opposite ends of the primary winding are respectively sleeved with the first side arm and the third side arm; A secondary winding is sleeved on the primary winding; A first insulating fixing member, wherein opposite ends of the first insulating fixing member are respectively sleeved with the second side arm and the fourth side arm; Wherein: a shielding layer is provided between the primary winding and the secondary winding, and the shielding layer is used to reduce the interference of the input of the primary winding on the output of the secondary winding.

2. The high-frequency high-voltage transformer according to claim 1, characterized in that: The shielding layer includes a lead wire and a layer of copper foil wound on the primary winding, one end of the lead wire is connected to the copper foil, and the other end of the lead wire is grounded.

3. The high-frequency high-voltage transformer according to claim 1, characterized in that: The primary winding includes a second insulating fixing member and a copper foil wound on the second insulating fixing member.

4. The high-frequency high-voltage transformer according to claim 3, characterized in that: The first insulating fixing member and the second insulating fixing member are both made of polycarbonate material, and a plurality of slots are provided on the first insulating fixing member and the second insulating fixing member.

5. The high-frequency high-voltage transformer according to claim 1, characterized in that: The secondary winding comprises a secondary support and an enameled wire. The secondary support is provided with a winding groove, and the enameled wire is wound in the winding groove.

6. The high-frequency high-voltage transformer according to claim 1, characterized in that: The first magnetic core and the second magnetic core are both UY magnetic cores.

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