Novel high-frequency transformer with low stray electromagnetic radiation

Abstract

The utility model relates to a novel high-frequency transformer with low stray electromagnetic radiation, which comprises a winding reel and two magnetic cores, the two magnetic cores are arranged face to face and are wound and fixed by insulating tapes, and the winding reel is clamped between the two magnetic cores; and a first coil winding, a copper foil winding, a third coil winding, a fourth coil winding and a fifth coil winding which are coaxial are wound on the winding reel. The transformer has the beneficial effects that the electromagnetic radiation shielding effect of the transformer is improved by adding the copper foil winding, and the electromagnetic radiation of the hybrid transformer to the surrounding environment and users is reduced.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a novel high-frequency transformer with low stray electromagnetic radiation. Background Art

[0002] The transformer will generate electromagnetic radiation during operation. The main electromagnetic radiation comes from the magnetic field generated when the current passes through the transformer winding. This magnetic field can penetrate the iron core of the transformer and the surrounding space to generate magnetic field radiation. The electromagnetic radiation generated by the transformer working for a long time will have a certain impact on the surrounding environment and human body. Therefore, when developing the transformer, it is necessary to reduce the electromagnetic radiation of the transformer through structural design. Utility Model Content

[0003] The purpose of the utility model is to overcome the above problems existing in the prior art and to provide a new high-frequency transformer with low stray electromagnetic radiation.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A novel high-frequency transformer with low stray electromagnetic radiation comprises a bobbin and two magnetic cores, wherein the two magnetic cores are arranged face to face and fixed by winding with insulating tape, and the bobbin is sandwiched between the two magnetic cores; a coaxial first coil winding, a copper foil winding, a third coil winding, a fourth coil winding, and a fifth coil winding are wound on the bobbin, the head end of the first coil winding is connected to pin No. 4 on the bobbin, the tail end of the first coil winding is connected to the head end of the fifth coil winding, the tail end of the fifth coil winding is connected to pin No. 3 on the bobbin, the head end of the fourth coil winding is connected to pin No. 1 of the bobbin, the tail end of the fourth coil winding and the head end of the copper foil winding are connected to pin No. 2 of the bobbin, the head end of the third coil winding is provided with a first flying lead extending outward from the top of the bobbin, and the tail end of the third coil winding is provided with a second flying lead extending outward from the top of the bobbin.

[0006] Among them, the number of turns of the first coil winding is 30 turns, the number of turns of the copper foil winding is 1.2 turns, the number of turns of the third coil winding is 3 turns, the number of turns of the fourth coil winding is 17 turns, and the number of turns of the fifth coil winding is 13 turns.

[0007] Among them, the outer surface of the first coil winding is wrapped with 1.2 turns of insulating tape, the outer surface of the copper foil winding is wrapped with 4 turns of insulating tape, the outer surface of the third coil winding is wrapped with 4 turns of insulating tape, the outer surface of the fourth coil winding is wrapped with 2 turns of insulating tape, and the outer surface of the fifth coil winding is wrapped with 3 turns of insulating tape.

[0008] The magnetic core has an air gap on one side, and two core columns of the magnetic core are respectively inserted into the cavity in the center of the winding drum from the two ends of the winding drum, and the two core columns of the magnetic core are bonded face to face with glue.

[0009] The novel high-frequency transformer is immersed in insulating varnish, taken out and then dried to form an insulating varnish film layer.

[0010] Among them, the No. 2 pin of the winding drum is connected to the side of the magnetic core with a lead wire, and the lead wire and the magnetic core are wrapped with insulating tape for 3 turns.

[0011] The first flying wire is covered with a white sleeve, and the second flying wire is covered with a black sleeve.

[0012] The beneficial effects of the utility model are: the electromagnetic radiation shielding effect of the transformer itself is improved by adding the copper foil winding, and the electromagnetic radiation of the transformer to the surrounding environment and users is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the new high-frequency transformer in the utility model from the side;

[0015] Figure 2 It is a schematic diagram of the front view of the new high-frequency transformer in the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the novel high-frequency transformer in the utility model when viewed from above;

[0017] Figure 4 It is the principle diagram of the new high-frequency transformer in the utility model;

[0018] Explanation of the numbers in the figure: magnetic core 1, winding bobbin 2, pin 1 21, pin 22, pin 3 23, pin 4 24, insulating tape 3, white sleeve 4, black sleeve 5, first coil winding N1, copper foil winding N2, third coil winding N3, fourth coil winding N4, fifth coil winding N5, first flying lead F+, second flying lead F-. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0020] like Figures 1 to 4As shown, a new type of high-frequency transformer with low stray electromagnetic radiation includes a winding bobbin 2 and two magnetic cores 1. The two magnetic cores 1 are arranged face to face and fixed with insulating tape 3, and the winding bobbin is clamped between the two magnetic cores.

[0021] An air gap is opened on one side of the magnetic core 1, and the core columns of the two magnetic cores 1 are respectively inserted into the cavity in the center of the winding drum from the two ends of the winding drum, and the core columns of the two magnetic cores 1 are bonded face to face with glue.

[0022] Pin No. 2 of the bobbin is connected to the side of the magnetic core 1 with a lead wire, and the lead wire and the magnetic core 1 are wrapped with insulating tape for 3 turns.

[0023] The bobbin is wound with a coaxial first coil winding N1, a copper foil winding N2, a third coil winding N3, a fourth coil winding N4, and a fifth coil winding N5, and the first coil winding N1, the copper foil winding N2, the third coil winding N3, the fourth coil winding N4, and the fifth coil winding N5 are arranged layer by layer from the inside to the outside on the bobbin. Specifically:

[0024] The number of turns of the first coil winding N1 is 30. The first coil winding N1 is formed by winding a copper wire with a wire specification of Φ0.32*1P2UEW-F in a dense winding manner. The outer surface of the first coil winding N1 is wound with 1.2 turns of insulating tape;

[0025] The number of turns of the copper foil winding N2 is 1.2. The copper foil winding N2 is formed by winding a 0.025T*5.5W adhesive-backed copper foil in the center of the winding drum 2. The outer surface of the copper foil winding N2 is wound with 4 turns of insulating tape.

[0026] The third coil winding N3 has 3 turns. The third coil winding N3 is formed by winding a copper wire with a wire specification of Φ0.55*2PTIW-B in a dense winding manner. The outer surface of the third coil winding N3 is wound with 4 turns of insulating tape.

[0027] The number of turns of the fourth coil winding N4 is 17. The fourth coil winding N4 is formed by winding a copper wire with a wire specification of Φ0.22*1P2UEW-F in a dense winding manner. The outer surface of the fourth coil winding N4 is wound with 2 turns of insulating tape.

[0028] The fifth coil winding N5 has 13 turns. The fifth coil winding N5 is formed by winding a copper wire with a wire specification of Φ0.32*1P2UEW-F in a dense winding manner. The outer surface of the fifth coil winding N5 is wound with 3 turns of insulating tape.

[0029] The head end of the first coil winding N1 is connected to pin No. 4 24 on the bobbin 2, the tail end of the first coil winding N1 is connected to the head end of the fifth coil winding N5, the tail end of the fifth coil winding N5 is connected to pin No. 3 23 on the bobbin, the head end of the fourth coil winding N4 is connected to pin No. 1 21 of the bobbin 2, and the tail end of the fourth coil winding N4 and the head end of the copper foil winding N2 are connected to pin No. 22 of the bobbin 2.

[0030] The head end of the third coil winding N3 is provided with a first flying lead F+ extending outward from the top of the winding drum 2, and the first flying lead F+ is covered with a white sleeve 4; the tail end of the third coil winding N3 is provided with a second flying lead F- extending outward from the top of the winding drum 2, and the second flying lead F- is covered with a black sleeve 5.

[0031] In order to improve the overall insulation of the new high-frequency transformer and prevent leakage of the new high-frequency transformer, the new high-frequency transformer is immersed in insulating varnish and then taken out and dried to form an insulating varnish film layer.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A new type of high frequency transformer with low stray electromagnetic radiation, characterized in that: The invention comprises a bobbin and two magnetic cores, wherein the two magnetic cores are arranged face to face and fixed by winding with insulating tape, and the bobbin is sandwiched between the two magnetic cores; a coaxial first coil winding, a copper foil winding, a third coil winding, a fourth coil winding and a fifth coil winding are wound on the bobbin, the head end of the first coil winding is connected to pin No. 4 on the bobbin, the tail end of the first coil winding is connected to the head end of the fifth coil winding, the tail end of the fifth coil winding is connected to pin No. 3 on the bobbin, the head end of the fourth coil winding is connected to pin No. 1 of the bobbin, the tail end of the fourth coil winding and the head end of the copper foil winding are connected to pin No. 2 of the bobbin, the head end of the third coil winding is provided with a first flying lead extending outward from the top of the bobbin, and the tail end of the third coil winding is provided with a second flying lead extending outward from the top of the bobbin.

2. The novel high frequency transformer according to claim 1 is characterized in that: The first coil winding has 30 turns, the copper foil winding has 1.2 turns, the third coil winding has 3 turns, the fourth coil winding has 17 turns, and the fifth coil winding has 13 turns.

3. The novel high frequency transformer according to claim 1 is characterized in that: The outer surface of the first coil winding is wrapped with 1.2 turns of insulating tape, the outer surface of the copper foil winding is wrapped with 4 turns of insulating tape, the outer surface of the third coil winding is wrapped with 4 turns of insulating tape, the outer surface of the fourth coil winding is wrapped with 2 turns of insulating tape, and the outer surface of the fifth coil winding is wrapped with 3 turns of insulating tape.

4. The novel high frequency transformer according to claim 1 is characterized in that: The magnetic core has an air gap on one side, and the core columns of the two magnetic cores are respectively inserted into the cavity in the center of the winding drum from the two ends of the winding drum, and the core columns of the two magnetic cores are bonded face to face with glue.

5. The novel high frequency transformer according to claim 1 is characterized in that: The novel high-frequency transformer is immersed in insulating varnish and then taken out and dried to form an insulating varnish film layer.

6. The novel high frequency transformer according to claim 1 is characterized in that: The No. 2 pin of the winding drum is connected to the side of the magnetic core with a lead wire, and the lead wire and the magnetic core are wrapped with insulating tape for 3 turns.

7. The novel high frequency transformer according to claim 1 is characterized in that: The first flying wire is covered with a white sleeve, and the second flying wire is covered with a black sleeve.

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