High-frequency high-voltage transformer

Abstract

The utility model provides a high-frequency high-voltage transformer which comprises a cylindrical insulating framework, insulating ring plates extending outwards in the radial direction are arranged on the periphery of the insulating framework, and the insulating ring plates are arranged at intervals in the axial direction and comprise the first insulating ring plate, the second insulating ring plate and the third insulating ring plate. First insulating ring plates are arranged at the two ends of the insulating framework in the axial direction respectively. An insulating groove is formed between the second insulating ring plate and the third insulating ring plate; a first winding groove adjacent to the insulating groove is formed between the second insulating ring plate and the first insulating ring plate, and a first coil is wound in the first winding groove; a second winding groove is formed between the third insulating ring plate and the other first insulating ring plate, and a second coil is wound in the second winding groove; the insulating groove, the first winding groove and the second winding groove are filled with insulating pouring materials. On the premise that the insulation safety of the transformer is met, the overall size is reduced, and the high-voltage conversion capacity of the transformer is improved.

Description

Technical Field

[0001] This utility model generally relates to the field of electronic transformers, and more specifically to a high-frequency high-voltage transformer. Background Technology

[0002] The reliability of high-voltage power supplies is one of the key factors affecting the quality of X-ray detection. In practical use, problems such as power supply failure, overheating, and overload can all lead to detection failure. Therefore, the performance of the high-frequency high-voltage transformer, the core component of the high-voltage power supply, directly determines the reliability of the high-voltage power supply, thus affecting the accuracy and lifespan of the X-ray source. Common difficulties encountered with high-frequency high-voltage transformers include challenges such as high output voltage and difficult insulation treatment, high turns ratio, large distributed capacitance, complex winding structure, difficulty in handling distributed parameters, and high temperature rise during long-term operation.

[0003] Traditional winding and insulation methods mainly fall into two categories: Figure 1 In medium- and high-frequency high-voltage transformers, the high- and low-voltage coils are wound separately around two insulating frames, and the entire coil is cast with epoxy resin. This method results in a large insulation distance between the high- and low-voltage coils, ensuring the main insulation. However, the center-to-center distance must be maintained during the casting process; even a slight deviation will prevent the magnetic core from being installed. Furthermore, this method involves multi-layer winding of the high-voltage coil, leading to problems such as large static capacitance, severe heat generation, and low efficiency in the transformer. Figure 2 Medium and high frequency high voltage transformers wind high and low voltage coils on the same insulating frame and then cast the whole structure with epoxy resin. Due to the influence of volume, the high voltage coil is often divided into two sections, each section is wound in multiple layers, and the number of layers is relatively large. Additional insulation design is required between the layers. This scheme also has large distributed capacitance, serious transformer heat generation, and difficult withstand voltage treatment. Figure 1 and Figure 2 The reference numerals in the attached diagram are: 11-high voltage coil; 12-low voltage coil; 13-magnetic core; 14-insulating material; 15-interlayer insulation; 16-insulating frame.

[0004] Therefore, there is a need to provide a high-frequency high-voltage transformer to at least partially solve the above problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this utility model provides a high-frequency high-voltage transformer, which includes an insulating frame. The insulating frame is cylindrical and has an insulating ring plate extending radially outward on its outer periphery. A plurality of the insulating ring plates are spaced apart axially. Each insulating ring plate includes:

[0007] The first insulating ring plate is disposed at both ends of the insulating frame along the axial direction;

[0008] A second insulating ring plate and a third insulating ring plate, wherein an insulating groove is formed between the second insulating ring plate and the third insulating ring plate;

[0009] A first winding groove adjacent to the insulating groove is formed between the second insulating ring plate and the first insulating ring plate, and a first coil is wound in the first winding groove;

[0010] A second winding groove is formed between the third insulating ring plate and another first insulating ring plate, and a second coil is wound in the second winding groove.

[0011] The insulating groove, the first winding groove, and the second winding groove are also filled with insulating potting material.

[0012] Optionally, the first coil is constructed by winding copper strip, the width of which matches the width of the first winding groove.

[0013] Optionally, the copper strip is at least partially covered by an insulating strip, the width W of which satisfies:

[0014] w + 2d ≤ W ≤ 2w + 2d;

[0015] Where w is the width of the copper strip and d is the thickness of the copper strip.

[0016] Optionally, the second coil is constructed by winding enameled wire; and / or the diameter of the winding of the second coil is 0.1 mm.

[0017] Optionally, the insulating skeleton is constructed of polycarbonate; and / or the insulating skeleton is constructed of a cylindrical shape.

[0018] Optionally, the high-frequency high-voltage transformer further includes a magnetic core, and the insulating frame is sleeved on the magnetic core.

[0019] Optionally, at least one insulating partition is also provided in the second winding groove to divide the second winding groove into at least two sub-groove segments.

[0020] Optionally, the insulating partition is provided with a wiring portion for connecting two adjacent sub-slot segments, so that the winding of the second coil can pass through the wiring portion into the adjacent sub-slot segment for winding; and / or

[0021] The number of turns of the coil is the same in each sub-slot segment.

[0022] Optionally, the angle between the extension direction of the wiring portion and the winding direction of the second coil is an acute angle.

[0023] Optionally, the wiring portions of two adjacent insulating partitions are staggered; and / or the wiring portions are constructed as notches or wiring holes.

[0024] This utility model provides a high-frequency high-voltage transformer. By winding the high-voltage and low-voltage coils on the same insulating frame, the overall volume of the transformer is reduced. By setting insulating grooves filled with insulating potting material between the high-voltage and low-voltage coils, isolation and protection between the high-voltage and low-voltage coils are achieved. By filling each winding groove with insulating potting material, the insulation performance is improved. Under the premise of meeting insulation safety, the overall volume of the transformer is reduced as much as possible, and the high-voltage conversion capability of the transformer is improved.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0026] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0027] Figure 1 This is a schematic diagram of the structure of a high-voltage transformer in the prior art;

[0028] Figure 2 This is a schematic diagram of another high-voltage transformer in the prior art;

[0029] Figure 3 This is a schematic diagram of the insulating frame portion of a high-frequency high-voltage transformer according to a preferred embodiment of the present invention, wherein the magnetic core is omitted.

[0030] Figure 4 This is a schematic diagram of a high-frequency high-voltage transformer according to a preferred embodiment of the present invention, wherein the magnetic core is omitted;

[0031] Figure 5 According to Figure 4 A schematic diagram of the assembly structure of the copper strip and insulation strip in the first coil of a high-frequency high-voltage transformer; and

[0032] Figure 6 according to Figure 3 A schematic diagram of the structure of a high-frequency high-voltage transformer.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. High-frequency high-voltage transformer; 110. Insulating frame; 111. First insulating ring plate; 112. Second insulating ring plate; 113. Third insulating ring plate; 114. Insulating partition; 114a. Wiring section; 115. First winding slot; 116. Second winding slot; 117. Insulating slot; 118. Sub-slot segment; 119. Isolation slot; 120. Insulating potting material; 130. Magnetic core; 140. First coil; 141. Copper strip; 142. Insulating strip; 150. Second coil. Detailed Implementation

[0035] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0036] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments and should not be construed as being limited to the embodiments set forth herein.

[0037] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this invention are for illustrative purposes only and are not intended to be limiting.

[0038] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0039] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0040] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0041] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0042] refer to Figures 3 to 6 This utility model provides a high-frequency high-voltage transformer 100, which includes an insulating frame 110 and a first coil 140 and a second coil 150 wound on the insulating frame 110.

[0043] See Figure 3 The insulating frame 110 has a cylindrical structure, and its outer periphery is provided with insulating ring plates extending outward in the radial direction. Multiple insulating ring plates are spaced apart in the axial direction, thereby forming multiple annular groove structures on the outer periphery of the insulating frame 110. Specifically, refer to... Figure 3 The plurality of insulating ring plates includes a first insulating ring plate 111, a second insulating ring plate 112, and a third insulating ring plate 113. Two first insulating ring plates 111 are respectively disposed at both ends of the insulating frame 110 along the axial direction. The second insulating ring plate 112 and the third insulating ring plate 113 are disposed between the two first insulating ring plates 111 at a distance.

[0044] See Figure 4 An insulating groove 117 is formed between the second insulating ring plate 112 and the third insulating ring plate 113. A first winding groove 115, adjacent to the insulating groove 117, is formed between the second insulating ring plate 112 and the first insulating ring plate 111. A second winding groove 116 is formed between the third insulating ring plate 113 and another first insulating ring plate 111. A first coil 140 is wound in the first winding groove 115; a second coil 150 is wound in the second winding groove 116.

[0045] After the first coil 140 and the second coil 150 are wound and assembled with the insulating frame 110, the insulating groove 117, the first winding groove 115 and the second winding groove 116 are filled with insulating filling material 120 through mold and insulating filling material 120, so that the insulating groove 117, the first winding groove 115 and the second winding groove 116 are filled with insulating filling material 120, thereby improving the insulation performance of the transformer.

[0046] For example, the first coil 140 can be a low-voltage coil and the second coil 150 can be a high-voltage coil.

[0047] For example, the insulating frame 110 can be cylindrical or constructed as a square tube. In this embodiment, the insulating frame 110 is cylindrical.

[0048] The insulating skeleton 110 can be made of epoxy resin or polytetrafluoroethylene. In this embodiment, the insulating skeleton 110 is constructed of polycarbonate, a material with advantages such as high strength and elastic modulus, high impact strength, high dielectric constant, and excellent insulation properties. Polycarbonate has a withstand voltage greater than 10kV / mm.

[0049] It should be noted that the insulating frame 110 of the high-frequency high-voltage transformer 100 of this utility model can be constructed as a single integral component or as a component assembled from multiple separate parts. For example, the cylindrical insulating frame 110 can be composed of two arc-shaped parts joined together, and the separate insulating frame 110 can reduce the difficulty of manufacturing.

[0050] In a preferred embodiment of this utility model, the first coil 140 is a low-voltage coil, which is wound with copper strip 141. The width of the copper strip 141 matches the width of the first winding groove 115. It should be noted that "matching" means that the width of the copper strip 141 is slightly smaller than the width of the first winding groove 115, which facilitates the installation of the copper strip 141 while making full use of the space in the first winding groove 115.

[0051] The copper strip 141 is at least partially covered by an insulating strip 142. The insulating strip 142 can be insulating tape or insulating paper. (Reference) Figure 5 This describes the assembly method of the copper strip 141 and insulating strip 142 of the first coil 140, where the arrow indicates the folding direction of the insulating strip 142.

[0052] The width W of the insulating tape 142 can be designed to satisfy the following formula:

[0053] w+2d≤W≤2w+2d;

[0054] Where w is the width of copper strip 141 and d is the thickness of copper strip 141.

[0055] refer to Figure 5In this embodiment, the width of the insulating tape 142 is smaller than the perimeter of the cross-section of the copper tape 141. This dimensional design ensures that the insulating tape 142 can completely cover at least three sides of the copper tape 141. During winding, this allows for minimizing the volume of the first coil 140 while ensuring inter-turn insulation requirements, thereby reducing the overall size of the transformer. Furthermore, it effectively avoids wasting the insulating tape 142.

[0056] The second coil 150 is made of enameled wire. In this embodiment, based on the overcurrent requirements of the actual high-frequency high-voltage transformer 100, the diameter of the enameled wire is selected as 0.1 mm. It can be understood that in other embodiments of this utility model, the size of the enameled wire can be flexibly selected according to the actual situation.

[0057] According to one embodiment of this utility model, at least one insulating partition 114 is further provided in the second winding slot 116 to divide the second winding slot 116 into at least two sub-slot segments 118. The second coil 150 is wound as a high-voltage coil in each sub-slot segment 118, which can effectively reduce the static capacitance of the high-voltage coil, reduce the distributed parameters of the entire transformer, reduce losses and temperature rise, and improve the efficiency and service life of the transformer.

[0058] It is understandable that the thickness of the first insulating ring plate 111, the second insulating ring plate 112, the third insulating ring plate 113 and the insulating partition plate 114 can be flexibly adjusted according to the voltage requirements of the transformer.

[0059] Preferably, in this embodiment, the second winding groove 116 is further provided with an isolation groove 119 at a position away from the first winding groove 115. (See reference) Figure 3 , Figure 4 and Figure 6 The isolation slot 119 of the high-frequency high-voltage transformer 100 is also filled with insulating potting material 120 to improve the transformer's high-voltage resistance.

[0060] See Figure 3 Furthermore, a wiring portion 114a for connecting two adjacent sub-slot segments 118 can be provided on the insulating partition 114. In this embodiment, after the winding of the second coil 150 is completed in one sub-slot segment 118, it passes through the wiring portion 114a to enter the next adjacent sub-slot segment 118 for winding. Exemplarily, the wiring portion 114a can be constructed as a notch or a wiring hole.

[0061] Preferably, the angle between the extension direction of the wire section 114a and the winding direction of the second coil 150 is an acute angle. This allows for smoother winding of the second coil 150 and avoids damage to the enameled wire during winding across the sub-slot section 118.

[0062] Preferably, in this embodiment, there are multiple insulating partitions 114, which are distributed approximately at equal intervals within the second winding slot 116. Correspondingly, in this embodiment, the number of coil turns in each sub-slot segment 118 is designed to be the same. It is understood that in other embodiments not shown in this utility model, the number of coil turns in each sub-slot segment 118 may also be designed to be different according to actual insulation requirements.

[0063] like Figure 3 As shown in the figure, in this embodiment, the wiring portions 114a of each of the two adjacent insulating partitions 114 are provided correspondingly.

[0064] In other embodiments of this invention, the wiring portions 114a of two adjacent insulating partitions 114 can also be staggered to increase the creepage distance. For example, the staggered angle of the wiring portions 114a of two adjacent insulating partitions 114 can be selected as 60°, 90°, 120° and 180°.

[0065] refer to Figure 6 The high-frequency high-voltage transformer 100 also includes a magnetic core 130, and an insulating frame 110 is sleeved on the magnetic post of the magnetic core 130. In this embodiment, the magnetic core 130 is formed by two E-type magnetic core modules joined together, and the insulating frame 110 is sleeved on the middle magnetic post of the magnetic core 130.

[0066] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0067] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A high-frequency high-voltage transformer, characterized by The high-frequency high-voltage transformer includes an insulating frame, which is cylindrical in shape and has an insulating ring plate extending radially outward on its outer periphery. Multiple insulating ring plates are spaced apart axially. Each insulating ring plate includes: The first insulating ring plate is disposed at both ends of the insulating frame along the axial direction; A second insulating ring plate and a third insulating ring plate, wherein an insulating groove is formed between the second insulating ring plate and the third insulating ring plate; A first winding groove adjacent to the insulating groove is formed between the second insulating ring plate and the first insulating ring plate, and a first coil is wound in the first winding groove; A second winding groove is formed between the third insulating ring plate and another first insulating ring plate, and a second coil is wound in the second winding groove. The insulating groove, the first winding groove, and the second winding groove are also filled with insulating potting material.

2. The high-frequency high-voltage transformer according to claim 1, characterized in that The first coil is constructed by winding copper strip, the width of which matches the width of the first winding groove.

3. The high-frequency high-voltage transformer according to claim 2, characterized in that The copper strip is at least partially covered by an insulating strip, the width W of which satisfies: w + 2d ≤ W ≤ 2w + 2d; Where w is the width of the copper strip and d is the thickness of the copper strip.

4. The high-frequency high-voltage transformer according to claim 1, characterized in that The second coil is constructed by winding enameled wire; and / or the diameter of the winding of the second coil is 0.1 mm.

5. The high-frequency high-voltage transformer according to claim 1, characterized in that The insulating skeleton is constructed of polycarbonate; and / or the insulating skeleton is constructed of a cylindrical shape.

6. The high-frequency high-voltage transformer according to claim 1, characterized in that The high-frequency high-voltage transformer also includes a magnetic core, and the insulating frame is sleeved on the magnetic core.

7. The high-frequency high-voltage transformer according to any one of claims 1 to 6, characterized in that, The second winding groove is also provided with at least one insulating partition to divide the second winding groove into at least two sub-groove segments.

8. The high-frequency high-voltage transformer according to claim 7, characterized in that The insulating partition is provided with a wiring section for connecting two adjacent sub-slot segments, so that the winding of the second coil can pass through the wiring section to enter the adjacent sub-slot segment for winding; and / or The number of turns of the coil is the same in each sub-slot segment.

9. The high-frequency high-voltage transformer according to claim 8, characterized in that The angle between the extension direction of the wiring section and the winding direction of the second coil is an acute angle.

10. The high-frequency high-voltage transformer according to claim 9, characterized in that The wiring portions of each of the two adjacent insulating partitions are staggered; and / or the wiring portions are constructed as notches or wiring holes.

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