Transformer for high-voltage power supply of electron microscope

Abstract

The utility model relates to a transformer for a high-voltage power supply of an electron microscope. The transformer comprises a bottom plate, a secondary side framework, a connecting column, a U-shaped magnetic core, a primary side framework and an upper pressing plate, the four groups of primary side frameworks are symmetrically mounted along the diagonal lines of the bottom plate, and the four groups of primary side windings are connected in series for use; the group of secondary side frameworks are arranged at the central position of the bottom plate; every two U-shaped magnetic cores form a group, the number of the U-shaped magnetic cores is four, each group of U-shaped magnetic cores is installed at the upper end and the lower end of one group of primary side frameworks respectively, two side columns of the U-shaped magnetic cores at the lower end are inserted into inner holes in the lower ends of the corresponding primary side frameworks and the central secondary side frameworks respectively, and two side columns of the U-shaped magnetic cores at the upper end are inserted into inner holes in the upper ends of the corresponding primary side frameworks and the central secondary side frameworks respectively. The upper pressing plate is placed on the magnetic core at the upper end, and the upper pressing plate and the bottom plate are fastened and positioned through the connecting column. Four groups of primary side coils are connected in series and are uniformly and symmetrically distributed, so that the requirements of output voltage and voltage ripples are met, and the stability, the reliability and the ripple quality of the power supply are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a transformer, in particular to a transformer for electron microscope high voltage power supply. BACKGROUND

[0002] ‌Electron microscope is widely used in modern medical diagnosis technology, biotechnology, semiconductor manufacturing and other technical fields, with the progress of technology, the requirement of electron microscope resolution is higher and higher, and the quality of key components high voltage power supply is crucial to the whole equipment, voltage and current output of power supply are high stability, high efficiency, high reliability, electromagnetic compatibility, low ripple and other key elements.

[0003] The electron microscope high voltage power supply generally requires that the output voltage is not less than 100 kilovolts, and the ripple is not greater than 0.05%, the existing transformer structure generally has a primary winding, a secondary winding and a magnetic core (or iron core), which is simple in structure, has defects such as large voltage output fluctuation, large noise and poor stability, and is easy to cause interference to the power grid. UTILITY MODEL CONTENT

[0004] The utility model provides a transformer for electron microscope high voltage power supply in view of the problems in the background art, further improves the power output stability and reliability, and reduces the ripple.

[0005] The utility model discloses a kind of transformers for electron microscope high voltage power supply, and the purpose is achieved by the following technical solutions:

[0006] A kind of transformer for electron microscope high voltage power supply, including bottom plate, secondary side skeleton, secondary side winding, connecting column, U-shaped magnetic core, primary side skeleton, primary side winding and upper pressing plate;The secondary side winding is wound on the secondary side skeleton, and the primary side winding is wound on the primary side skeleton;The primary side skeleton has four groups, and is installed along the diagonal line of bottom plate symmetry, and four primary side windings are used in series;The secondary side skeleton has a group, and is installed at the center position of bottom plate;The U-shaped magnetic core two are a group, and there are four groups, and each group of U-shaped magnetic core is installed at the upper and lower ends of a group of primary side skeleton, the U-shaped magnetic core two sides column of lower end is inserted into the corresponding primary side skeleton and the lower end inner hole of center secondary side skeleton respectively, and the U-shaped magnetic core two sides column of upper end is inserted into the corresponding primary side skeleton and the upper end inner hole of center secondary side skeleton respectively;The upper pressing plate is placed on the upper end of the magnetic core, and the upper pressing plate and bottom plate are fixed in position by connecting column.

[0007] Preferably, the bottom plate and the upper pressing plate are both rectangular insulating materials.

[0008] Preferably, the bottom plate and the upper pressing plate are made of polytetrafluoroethylene plate.

[0009] Preferably, the connecting column is a round rod of pure copper material.

[0010] Preferably, the connecting column is threaded at both ends, facilitating fastening with nuts, and smooth rod-shaped in the middle.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses four groups of primary side coils are connected in series and are evenly and symmetrically distributed, the transformer structure of the utility model satisfies output voltage and voltage ripple requirements, and practical use proves that the stability, reliability and ripple quality of the power supply are greatly improved after the electron microscope high-voltage power supply uses the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model.

[0014] Figure 2 It is the layout schematic diagram of the primary side framework, U-shaped magnetic core and secondary side framework of the utility model.

[0015] Figure 3 It is the bottom plate and upper pressing plate schematic diagram of the utility model.

[0016] Figure 4 It is the secondary side framework and secondary side winding schematic diagram of the utility model.

[0017] Figure 5 It is the U-shaped magnetic core schematic diagram of the utility model.

[0018] Figure 6 It is the primary side framework and primary side winding schematic diagram of the utility model.

[0019] Wherein: 1, bottom plate, 1-1, connecting installation hole, 1-2, primary side framework and magnetic core installation hole, 2, secondary side framework, 2-1, winding groove, 2-2, connecting column, 2-3, inner hole, 3, connecting column, 4, U-shaped magnetic core, 4-1, crossbeam, 4-2 side column, 5, primary side framework, 5-1, inner hole, 5-2, wire slot, 5-3, primary side winding, 6, upper pressing plate. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the utility model for realizing the predetermined utility model purposes, the following will be described in detail in combination with the preferred embodiments, the specific embodiments, structures, features and effects of the utility model.

[0021] As shown in Figures 1 to 6 The utility model discloses a transformer for electron microscope high-voltage power supply, including bottom plate 1, secondary side framework 2, connecting column 3, U-shaped magnetic core 4, primary side framework 5, upper pressing plate 6.

[0022] The Litz wire is wound in the wire slot 5-2 of the primary skeleton 5 according to the designed parameters (such as wire diameter, number of turns, winding direction, etc.), and the primary winding 5-3 is fixed by using insulating tape or insulating glue (such as Figure 6 ), so that four are wound and installed along the diagonal lines of the bottom plate 1.

[0023] Take a U-shaped magnetic core 4, insert it into the inner hole 5-1 of one end of the primary skeleton 5 made above, place it along the two diagonal lines of the bottom plate 1, and place the primary skeleton close to the right-angled end of the bottom plate 1, and place the other end of the U-shaped magnetic core 4 in the center area of the bottom plate 1. Similarly, the other three U-shaped magnetic cores 4 are assembled into the inner holes 5-1 of the other three primary skeletons 5 and placed on the diagonal lines of the bottom plate 1.

[0024] The enameled wire of the secondary winding is wound in the winding slot 2-1 of the secondary skeleton 2 according to the designed parameters, and the two ends of the winding enameled wire are welded on the terminal posts 2-2, and the winding is fixed by using insulating tape (such as Figure 4 ).

[0025] Place the wound secondary skeleton 2 in the center area of the bottom plate 1, and place it above the cross beams 4-1 of the four U-shaped magnetic cores 4, and the other side columns 4-2 of the four U-shaped magnetic cores 4 are inserted into the inner holes 2-3 of the secondary skeleton 2; take four U-shaped magnetic cores 4, insert the side columns 4-2 of the magnetic cores into the inner holes 5-1 of the four primary skeletons from above the secondary skeleton 2, and insert the other side columns 4-2 into the inner holes 2-3 of the secondary skeleton 2 (such as Figure 2 ).

[0026] The connecting column 3 is fixedly connected with the bottom plate 1 by using a standard nut.

[0027] Place the upper pressing plate 6 above the cross beams 4-1 of the upper magnetic cores, and the upper pressing plate 6 and the bottom plate 1 are both square and rectangular insulating material plates, and their thicknesses are determined according to the design requirements, and both have connecting mounting holes 1-1 and primary skeleton and magnetic core mounting holes 1-2 (such as Figure 3 ), and the hole sizes are the same. The connecting column 3 is connected with the connecting mounting hole 1-1 and the primary skeleton and magnetic core mounting hole 1-2, and is fastened by using a nut.

[0028] The four primary windings are connected in series, and the production of the utility model is completed.

[0029] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A transformer for an electron microscope high voltage power supply, characterized by: It includes bottom plate, vice side skeleton, vice side winding, connecting column, U-shaped magnetic core, original side skeleton, original side winding and upper pressing plate; the vice side winding is wound on the vice side skeleton, and the original side winding is wound on the original side skeleton; the original side skeleton has four groups, is installed along the diagonal line of the bottom plate symmetrically, and four groups of the original side winding are used in series; the vice side skeleton has one group, and is installed at the center position of the bottom plate; two U-shaped magnetic cores form one group, and there are four groups in total; each group of U-shaped magnetic cores is installed at the upper and lower ends of one group of original side skeletons respectively, the two side columns of the U-shaped magnetic core at the lower end are respectively inserted into the corresponding original side skeleton and the lower end inner hole of the center vice side skeleton, and the two side columns of the U-shaped magnetic core at the upper end are respectively inserted into the corresponding original side skeleton and the upper end inner hole of the center vice side skeleton; the upper pressing plate is placed on the upper end of the magnetic core, and the upper pressing plate and the bottom plate are fixed in position through the connecting column.

2. A transformer for an electron microscope high voltage power supply as claimed in claim 1, characterized in that: The bottom plate and the upper pressing plate are both rectangular insulating materials.

3. A transformer for an electron microscope high voltage power supply as claimed in claim 2, characterized in that: The bottom plate and the upper pressing plate are made of polytetrafluoroethylene plate.

4. A transformer for use in an electron microscope high voltage power supply as claimed in claim 1, characterized in that: The connecting column is a round rod-shaped pure copper material.

5. A transformer for use in an electron microscope high voltage power supply as claimed in claim 1 or 4, characterized in that: The two ends of the connecting column are threaded, which is convenient for fastening with nuts, and the middle part is a smooth rod.

Images