CN216287937U

CN216287937U - High-frequency isolation transformer

Info

Publication number: CN216287937U
Application number: CN202122755615.3U
Authority: CN
Inventors: 魏云峰
Original assignee: SUQIAN BOHER HIGH VOLTAGE POWER SUPPLIES CO LTD
Current assignee: SUQIAN BOHER HIGH VOLTAGE POWER SUPPLIES CO LTD
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-12
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a high-frequency isolation transformer, which comprises a U-shaped magnetic core, a framework, a primary coil winding, a secondary coil winding, copper foil and an insulating paper tape, wherein the framework is arranged on the U-shaped magnetic core; the U-shaped magnetic cores are two in one group, and the framework is sleeved on one side of the U-shaped magnetic cores; the primary coil winding is wound on the outer side of the framework, the copper foil and the secondary coil winding are sequentially wound on the outer side of the primary coil winding from inside to outside, and the insulating paper tapes are respectively arranged between the copper foil and the primary coil winding as well as between the copper foil and the secondary coil winding. The primary winding and the secondary winding of the isolation transformer are wound on one side of the U-shaped magnetic core group and are isolated in an insulating mode through a plurality of layers of insulating paper tapes, primary side electromagnetism and secondary side electromagnetism are effectively shielded from interfering with each other, and the problems of breakdown, creepage and electric leakage are effectively solved.

Description

High-frequency isolation transformer

Technical Field

The present invention relates to a transformer device, and more particularly, to a high frequency isolation transformer for an electron beam high voltage generator.

Background

The electron beam high-voltage power supply is a precise high-voltage generator, and requires stable output voltage performance, high precision and small fluctuation. Therefore, the primary winding and the secondary winding must be isolated from each other, so as to avoid electromagnetic interference and ensure stable high-voltage output. The existing electron beam high-voltage power supply needs to use an isolation transformer to ensure the stability of output voltage, but because the output voltage, the output power and the precision requirement of each power supply are different, different methods are adopted for isolation to ensure that the use meets the requirement. The main functions of the isolation transformer are as follows: completely insulating the electricity of the primary side and the secondary side to isolate the loop; in addition, the characteristic of large high-frequency loss of the iron core is utilized to inhibit high-frequency noise waves from being transmitted into the control loop. However, the existing isolation transformer cannot be used in a high-voltage environment because it is easy to break down, creep, leak current and damage itself in the high-voltage environment, and cannot play a role in isolation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high-frequency isolation transformer aiming at the problems in the background technology, and aims to provide a high-frequency isolation transformer which comprises the following components: the problem of present voltage isolation transformer puncture easily under high-voltage environment, creepage, electric leakage is solved, can be applicable to in the high-voltage environment.

In order to achieve the above object, the technical solution of the present invention is as follows:

a high-frequency isolation transformer comprises a U-shaped magnetic core, a framework, a primary coil winding, a secondary coil winding, copper foil and an insulating paper tape; the U-shaped magnetic cores are two in one group, and the framework is sleeved on one side of the U-shaped magnetic cores; the primary coil winding is wound on the outer side of the framework, the copper foil and the secondary coil winding are sequentially wound on the outer side of the primary coil winding from inside to outside, and the insulating paper tapes are respectively arranged between the copper foil and the primary coil winding as well as between the copper foil and the secondary coil winding.

Further, the U-shaped magnetic core is made of ferrite.

Furthermore, the framework is in a square tubular shape and made of insulating materials.

Furthermore, the U-shaped magnetic core is fastened by a steel ribbon after being provided with the framework, and the joint is firmly welded.

Furthermore, the two ends of the primary coil winding are provided with outgoing lines for facilitating voltage input, the secondary coil winding is wound on the insulating paper tape, and the two ends of the secondary coil winding are provided with outgoing lines for facilitating voltage output.

Furthermore, the insulating paper tape is formed by winding a plurality of layers of insulating paper from the framework to the outermost layer, and the width of the insulating paper tape is reduced in sequence.

Further, the width of the copper foil is larger than that of the primary coil winding, the copper foil winding is not closed, and one side of the copper foil winding is conducted with the magnetic core.

The utility model has the beneficial effects that:

the primary winding and the secondary winding of the isolation transformer are wound on one side of the U-shaped magnetic core group and are isolated in an insulating mode through a plurality of layers of insulating paper tapes, primary side electromagnetism and secondary side electromagnetism are effectively shielded from interfering with each other, and the problems of breakdown, creepage and electric leakage are effectively solved.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side view of the present invention.

FIG. 3 is a schematic cross-sectional view of the present invention.

In the figure: the magnetic core comprises a U-shaped magnetic core magnetic group, a square framework, a primary coil winding, an isolation copper foil, a secondary coil winding, an insulation paper tape, a binding tape and a metal wire, wherein the U-shaped magnetic core magnetic group comprises 2, the square framework comprises 3, the primary coil winding comprises 4, the isolation copper foil comprises 5, the secondary coil winding comprises 6, the insulation paper tape comprises 7, and the metal wire comprises 8.

Detailed Description

The present invention will be described in detail with reference to examples.

As shown in fig. 1 to 3, the high-frequency isolation transformer of the present invention includes a U-shaped magnetic core magnetic group 1, a square frame 2, a primary coil winding 3, an isolation copper foil 4, a secondary coil winding 5, an insulation paper tape 6, a ribbon 7, and a metal wire 8. The square framework 2 is sleeved on one side of the U-shaped magnetic core magnetic group 1, the primary coil winding 3 is wound on the outer side of the square framework 2 and fixed, a layer of insulating paper tape 6 is wound on the periphery of the primary coil winding 3, then a circle of isolating copper foil 4 is wound, the copper foils are not connected and closed, a distance of 2 mm is reserved, the isolating copper foil 4 is fixed by an adhesive tape, and the isolating copper foil 4 is communicated with the U-shaped magnetic core magnetic group 1 through a metal wire 8. The insulating paper tape 6 is wound on the isolating copper foil 4 in a plurality of layers (the number of layers is determined by calculation), and the outer layer paper tape is narrower than the inner layer paper tape (the width is determined by calculation). And the secondary side coil winding 5 is wound on the insulating paper tape 4 and fixed by using an insulating adhesive tape, and an output wire end is reserved. And winding a plurality of layers of insulating paper tapes 4 on the secondary coil winding 5, wherein the width of the outer layer of paper tape is narrower than that of the inner layer of paper tape, and fixing the outer layer of paper tape by using an adhesive tape.

The primary side and the secondary side of the utility model are completely insulated electrically, so that the loop is isolated; in addition, the characteristic of large high-frequency loss of the iron core is utilized, so that high-frequency noise waves are restrained from being transmitted into the control loop.

Claims

1. A high-frequency isolation transformer comprises a U-shaped magnetic core, a framework, a primary coil winding, a secondary coil winding, copper foil and an insulating paper tape; the method is characterized in that: the U-shaped magnetic cores are two in one group, and the framework is sleeved on one side of the U-shaped magnetic cores; the primary coil winding is wound on the outer side of the framework, the copper foil and the secondary coil winding are sequentially wound on the outer side of the primary coil winding from inside to outside, and the insulating paper tapes are respectively arranged between the copper foil and the primary coil winding as well as between the copper foil and the secondary coil winding.

2. A high frequency isolation transformer as claimed in claim 1, wherein: the U-shaped magnetic core is made of ferrite.

3. A high frequency isolation transformer as claimed in claim 1, wherein: the framework is in a square tubular shape and made of insulating materials.

4. A high frequency isolation transformer as claimed in claim 1, wherein: the U-shaped magnetic core is fastened by a steel ribbon after being provided with the framework, and the joint is firmly welded.

5. A high frequency isolation transformer as claimed in claim 1, wherein: the two ends of the primary coil winding are provided with outgoing lines for facilitating voltage input, the secondary coil winding is wound on the insulating paper tape, and the two ends of the secondary coil winding are provided with outgoing lines for facilitating voltage output.

6. A high frequency isolation transformer as claimed in claim 1, wherein: the insulating paper tape is formed by winding a plurality of layers of insulating paper, and the width of the insulating paper tape is reduced from the framework to the outermost layer.

7. A high frequency isolation transformer as claimed in claim 1, wherein: the width of the copper foil is larger than that of the primary coil winding, the copper foil winding is not closed, and one side of the copper foil winding is conducted with the magnetic core.