CN216749575U

CN216749575U - Audio transformer

Info

Publication number: CN216749575U
Application number: CN202123112456.1U
Authority: CN
Inventors: 魏兵团; 李峰; 张蔚哲; 陈睿; 梁蓓; 刘金伟
Original assignee: XIANYANG JINSHAN YIXIN ELECTRONIC TECHNOLOGY CO LTD
Current assignee: XIANYANG JINSHAN YIXIN ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-14
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to an electronic components, specific audio transformer that says so. The utility model discloses include skeleton, coil, potting material, shell, it has the coil around having wound on the skeleton, and internal assembly has the alloy piece, and alloy piece outside is packaged with potting material and shell. The utility model has the advantages of the transformer is little to the audio signal distortion, and the frequency response scope is wide, and signal coupling coefficient is high, keeps apart external interference signal, keeps apart external noise, connects produced noise current between the elimination equipment, and small, rational in infrastructure, manufacturing convenience, long service life, reliability are high, have excellent characteristics such as waterproof, dustproof, anti-vibration impact. The process technology is convenient and reliable to implement. The method is very suitable for application occasions such as multimedia conferences, audio and video systems, field sound amplification systems, wireless microphones and the like.

Description

Audio transformer

Technical Field

The utility model relates to an electronic components, specific audio transformer that says so.

Background

The audio transformer works in a wider frequency band, the primary inductance and leakage inductance of the transformer are main factors of the electrical indexes of the transformer in low-frequency and high-frequency bands, and external electromagnetic interference resistance is an important index for measuring the stability and reliability of the audio transformer. The existing audio transformer component uses silicon steel sheets mostly made of silicon steel, has low magnetic conductivity, so that the primary inductance is low, the transformer has large distortion at a low frequency band, signal transmission is poor, the use frequency is narrow, and the best impedance matching cannot be achieved. The structure mode adopts the contact pin type installation mostly, does not have the mode of embedment and not taking the shell, and is poor to external interference signal shielding, when the audio signal transmission between system or equipment, because the different electric potential between two signal lines of audio signal line can produce the return circuit or disturb to ground, under the condition of audio signal transmission distance overlength, very easily produces higher ground loop voltage, serious will lead to audio signal distortion and accompany interference phenomena such as current noise, can even produce and strike sparks and lead to the damage of other electronic components of circuit. When electromagnetic interference exists in the nearby outside, interference signals can be coupled into a working magnetic field of the transformer, the external interference signals cannot be shielded, and other signals are superposed in primary and secondary current signals of the transformer, so that nourishing noise exists in audio signals, and the using effect is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an audio transformer components and parts that frequency range is wide in the use, and signal distortion degree is little, and anti external electromagnetic interference is strong.

The utility model discloses include skeleton, coil, potting material, shell, it has the coil around having on the skeleton, is equipped with the alloy piece outside the coil, and the alloy piece is equipped with the potting material outward, is equipped with the shell outside the potting material.

The alloy sheet is formed by inserting and stacking E-shaped magnetic conductive alloy sheets one by one, and is made of iron-nickel alloy magnetic conductive materials.

The shell is of a sealed structure and is made of iron-nickel alloy magnetic materials.

The potting material is an elastic material.

The utility model has the advantages of increased seal structure's iron-nickel alloy magnetic material shell in the outside of transformer body, kept apart the outside electromagnetic interference signal of transformer to shielded the electromagnetic interference of transformer itself to the all the other partial electronic components of circuit.

And secondly, the silicon steel sheet with the EI-shaped structure made of the internal silicon steel material is replaced by an E-shaped iron-nickel alloy magnetic conductive material alloy sheet, so that the magnetic conductivity of the material is improved, the primary inductance of the transformer is improved, the low-frequency performance of the transformer is improved, and an air gap is reserved on the end face of the oppositely inserted E-shaped sheet of the E-shaped alloy sheet, so that a magnetic circuit is not easy to saturate, and the distortion of signals is reduced.

The potting material in the shell is an elastic packaging material, so that the potting material can prevent the alloy sheet of the transformer from being solidified into a whole due to noise generated by magnetostriction when the alloy sheet works, the noise is not easy to generate, the insulating strength between the primary winding and the secondary winding is improved, and the reliability of the product is improved. The potting material has small stress after curing, can be well bonded and cured with an embedded component, ensures the stability of the performance and the size of the product before and after packaging, has good consistency and good suitability of an assembly structure, and can play the roles of water resistance, dust resistance and vibration and impact resistance. It is very suitable for multimedia conference, audio and video system, field sound amplification system, wireless microphone and other application occasions.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

1-a framework; 2-a coil; 3-alloy sheet; 4-potting material; 5-outer cover

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings:

the utility model comprises a framework, a coil, a potting material and a shell, wherein the coil (2) is wound on the framework (1), an alloy sheet (3) is arranged outside the coil (2), the alloy sheet (3) is formed by inserting and stacking one sheet of E-shaped magnetic conductive alloy sheet (3), and the material is iron-nickel alloy magnetic conductive material; the alloy sheet (3) is externally provided with a potting material (4), and the potting material (4) is an elastic material; the casing (5) is arranged outside the potting material (4), and the casing (5) is of a sealed structure and is made of iron-nickel alloy magnetic materials.

The working principle is as follows:

the audio transformer is characterized in that a primary coil and a secondary coil with certain turns are wound on a framework through enameled wires, an iron core made of magnetic conductive materials is inserted into a middle opening of the framework inside the coil to form a closed magnetic circuit, and when an electric signal is input primarily into the transformer, the secondary outputs required voltage, current, power and other parameters through electromagnetic energy conversion, and plays a corresponding role in impedance matching and isolation.

The iron-nickel alloy high-permeability shielding shell is additionally arranged outside the audio transformer, the shell is welded with the empty pin which is not used by the transformer, then the empty pin is welded on the circuit board, and the pin is grounded on the circuit board, so that an interference signal is absorbed by the high-permeability shell and then guided into the ground, the signal transmission of the audio transformer can not be interfered, the peak interference is eliminated, and the purified sound is improved.

The transformer iron core is formed by inserting and stacking high-permeability material iron-nickel alloy with an EE type structure one by one, so that the primary inductance is larger than that of a silicon steel sheet commonly used in the market, and the low-frequency response of the transformer is good. And the alloy sheet of EE type structure has reserved the air gap at the E shape piece terminal surface of pegging graft, can make the magnetic circuit be difficult to saturate, reduces the distortion of signal. The coil adopts the mode of enameled wire double-wire parallel winding, the primary coil and the secondary coil are tightly coupled, so that the magnetic flux passing through the primary coil is almost completely linked with the secondary coil, the coupling coefficient is close to 1, the coupling coefficient is good, the leakage inductance is small, the response of the high frequency band of the transformer is increased, the waveform of an audio signal of the audio transformer is unchanged in a wide frequency range, and the audio signal is not attenuated and is not distorted.

The potting material in the shell is a vacuum-encapsulated packaging material which has certain elasticity after being cured, and the potting material fills the winding and the air gap cavity in the shell, so that internal accessories such as coils, alloy sheets and the like can be softly protected without causing potential quality hazard damage to the internal accessories. And the potting material enables the magnetic conductive alloy sheets to be solidified into a whole, so that the noise generated by magnetostriction of the alloy sheets in the transformer due to magnetic flux change during working can be avoided, the insulating strength between the coils of the transformer is improved, and the reliability of the product is improved. The potting material has small stress after curing, can be well bonded and cured with an embedded part, ensures the stability of the performance and the size of a product before and after packaging, has good consistency and good assembly structure adaptability, can play the roles of water resistance, dust resistance and vibration impact resistance, can ensure the long-time stable work of the product, and improves the reliability of the product. Therefore, the failure rate of the transformer is effectively reduced, and the quality complaints and feedback of customers are reduced.

Claims

1. The utility model provides an audio transformer, includes skeleton, coil, potting material, shell, its characterized in that: a coil (2) is wound on the framework (1), an alloy sheet (3) is arranged outside the coil (2), a potting material (4) is arranged outside the alloy sheet (3), and a shell (5) is arranged outside the potting material (4).

2. The audio transformer according to claim 1, wherein: the alloy sheet (3) is formed by inserting and stacking one sheet of E-shaped magnetic conductive alloy sheet (3) and is made of iron-nickel alloy magnetic conductive material.

3. The audio transformer according to claim 1, wherein: the shell (5) is of a sealed structure and is made of iron-nickel alloy magnetic materials.

4. The audio transformer according to claim 1, wherein: the potting material (4) is made of an elastic material.