CN205789447U - A kind of audio-frequency transformer - Google Patents

Abstract

This utility model is applicable to electronic device field, provide a kind of audio-frequency transformer, including silicon steel sheet, primary coil, secondary coil and pin, described primary coil is around being arranged at outside described silicon steel sheet and be close to described silicon steel sheet, and described secondary coil and described primary coil interval cincture are arranged at outside described primary coil；Described primary coil, secondary coil surface configuration have enamel-covered wire layer, described enamel-covered wire layer include intersecting into angle, constitute latticed first winding layer and the second winding layer；Described primary coil, secondary coil are outside equipped with shield shell.This utility model embodiment is by being provided separately primary coil with secondary coil, shield shell is put at coil peripheral hardware, enamel-covered wire outside coil uses grid type winding mode, audio-frequency transformer is made to have enough safe distances, insertion loss is little, it is difficult to breakdown between coil, greatly reduces electromagnetic interference simultaneously.

Description

A kind of audio-frequency transformer

Technical field

This utility model belongs to electronic device field, particularly relates to a kind of audio-frequency transformer.

Background technology

Audio-frequency transformer radio communication, radio and television, automatically control in defeated as voltage amplification, power The element of circuit such as go out, be usually used in the impedance of voltage of transformation or transformation load, utilize impedance transformation principle, real Existing speaker mates with power amplifier output impedance, thus obtains the output of maximum.

Traditional audio-frequency transformer includes the silicon steel sheet of a frame-shaped, primary coil and secondary coil, described primary In the two-arm that coil is relative rotating around being formed on silicon steel sheet with secondary coil, when primary coil is executed by audio-frequency transformer When adding alternating voltage, alternating flux, a winding and Secondary Winding generation galvanomagnetic-effect can be produced in the core, Making audio-frequency transformer serve the effect of power transmission, coil includes enamel-covered wire layer and interlayer insulating layer simultaneously, The winding mode of enamel-covered wire layer is generally universal winding.

But audio-frequency transformer silicon steel sheet, primary coil and secondary coil use global design, primary coil and In the two-arm that secondary coil is relative rotating around being formed on silicon steel sheet, cause excessive insertion loss and safe distance not Enough, and audio-frequency transformer is not added with protection and is exposed to outside electronic component, easily external electronic component is produced electricity Magnetic disturbance, meanwhile, the generally lattice coil of honeycomb coil, in addition to the distribution capacity between circle and circle, The most also having distribution capacity, therefore, there is the shortcoming that distribution capacity is big, meanwhile, layer in lattice coil And the voltage phase difference between layer is more, when there is high voltage at coil two ends, easily causes turn-to-turn insulation and puncture.

The most existing audio-frequency transformer insertion loss and safe distance is inadequate, electromagnetic interference is big, honeycomb coil Easily puncture.

Utility model content

This utility model embodiment provides a kind of audio-frequency transformer, it is intended to solves existing audio-frequency transformer and inserts Loss is inadequate with safe distance, electromagnetic interference is big, the problem that honeycomb coil easily punctures.

This utility model embodiment is achieved in that a kind of audio-frequency transformer,

Including silicon steel sheet, primary coil, secondary coil and pin, wherein,

Described primary coil is around being arranged at outside described silicon steel sheet and being close to described silicon steel sheet, described secondary wire Circle and described primary coil interval cincture are arranged at outside described primary coil；

Described primary coil, secondary coil surface configuration have enamel-covered wire layer, described enamel-covered wire layer to include mutually handing over Pitch into angle, constitute latticed first winding layer and the second winding layer；

Described primary coil, secondary coil are outside equipped with shield shell.

Further, described secondary coil and described primary coil spacing distance are 4mm～7mm.

Further, the first winding layer of described enamel-covered wire and the angle of the second winding layer are 60 degree～90 degree.

Further, described enamel-covered wire layer is multilamellar, is provided with insulating barrier between described multilamellar enamel-covered wire layer.

The audio-frequency transformer of this utility model embodiment, by primary coil is being provided separately with secondary coil, Putting shield shell at coil peripheral hardware, the enamel-covered wire outside coil uses grid type winding mode so that audio frequency transformation Utensil has enough safe distances, and insertion loss is little, is difficult to breakdown, greatly reduces simultaneously between coil Electromagnetic interference.

Accompanying drawing explanation

Fig. 1 is the audio-frequency transformer generalized section that this utility model embodiment provides；

Fig. 2 is the enamel-covered wire layer winding schematic diagram of the audio-frequency transformer that this utility model embodiment provides；

Fig. 3 is the audio-frequency transformer partial cutaway schematic that this utility model embodiment provides；

Fig. 4 is the multilamellar enamel-covered wire schematic diagram of the audio-frequency transformer that this utility model embodiment provides.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically Embodiment, only in order to explain this utility model, is not used to limit this utility model.

It should be noted that when element is referred to as " being fixed on " or " being arranged at " another element, and it is permissible Directly on another element or may be simultaneously present centering elements.It is known as when an element and " connects In " another element, it can be directly to another element or may be simultaneously present centering elements.

Also, it should be noted the orientation term such as left and right, upper and lower in this utility model embodiment, only It is relative concept or with the normal operating condition of product as reference each other, and should not be regarded as that there is limit Property processed.

As shown in Figure 1 and Figure 2, a kind of audio-frequency transformer that this utility model embodiment provides,

Including silicon steel sheet 1, primary coil 2, secondary coil 3 and pin 4, wherein, described primary coil 2 Outer and be close to described silicon steel sheet 1 around being arranged at described silicon steel sheet 1, described secondary coil 3 with described at the beginning of Level coil 2 is spaced and around being arranged at outside described primary coil 2, between primary coil and secondary coil not Use Integral design again, but freestanding design, can effectively ensure between primary and secondary coil Safe distance；

Described primary coil 2, secondary coil 3 surface configuration have enamel-covered wire layer 5, described enamel-covered wire layer 5 to include Intersect into angle, constitute latticed first winding layer 51 and the second winding layer 52, in this practicality In new embodiment, as in figure 2 it is shown, the first winding layer 51 of described enamel-covered wire and the second winding layer 52 Angle a is 60 degree～90 degree, and the coiling of grid type makes the transformer coil number of plies reduce, and capacitance profile is less, It is difficult to puncture；

Described primary coil 2, secondary coil 3 are outside equipped with shield shell 6, and the least transformator is to it The interference of his electronic component.

As it is shown on figure 3, in this utility model embodiment, described secondary coil 3 and described primary coil 2 Spacing distance d is 4mm～7mm so that transformer inputs and outfan coil have safe distance.

As shown in Figure 4, in this utility model embodiment, described enamel-covered wire layer is multilamellar, described multilamellar paint Being provided with insulating barrier 7 between envelope curve layer 5, insulating barrier ensures the resistance to sparking between multilamellar enamel-covered wire further Energy.

The audio-frequency transformer that this utility model embodiment provides, by separating primary coil with secondary coil Arranging, put shield shell at coil peripheral hardware, the enamel-covered wire outside coil uses grid type winding mode so that sound Frequency power transformer has enough safe distances, and insertion loss is little, is difficult to breakdown between coil, the most significantly Reduce electromagnetic interference.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should Within being included in protection domain of the present utility model.

Claims (4)

1. an audio-frequency transformer, including silicon steel sheet, primary coil, secondary coil and pin,

It is characterized in that,

Described primary coil is around being arranged at outside described silicon steel sheet and being close to described silicon steel sheet, described secondary wire Circle and described primary coil interval cincture are arranged at outside described primary coil；

Described primary coil, secondary coil surface configuration have enamel-covered wire layer, described enamel-covered wire layer to include mutually handing over Pitch into angle, constitute latticed first winding layer and the second winding layer；

Described primary coil, secondary coil are outside equipped with shield shell.

Audio-frequency transformer the most according to claim 1, it is characterised in that described secondary coil is with described Primary coil spacing distance is 4mm～7mm.

Audio-frequency transformer the most according to claim 1, it is characterised in that the first of described enamel-covered wire twines The angle of winding layer and the second winding layer is 60 degree～90 degree.

Audio-frequency transformer the most according to claim 1, it is characterised in that described enamel-covered wire layer is multilamellar, It is provided with insulating barrier between described multilamellar enamel-covered wire layer.