CN206584766U - High frequency lead - Google Patents

Abstract

The utility model is related to lead technology field, discloses a kind of high frequency lead, to effectively reduce high frequency magnetic field or electric current and higher hamonic wave to being lost caused by wire.All enamel-covered wires in high frequency lead disclosed in the utility model, including at least two strands bundle conductors, each bundle conductor are isometric and in staggeredly transposition is arranged in braided between arranged in parallel, and each bundle conductor；The quantity of enamel-covered wire in wherein each bundle conductor is consistent, and the specification of each enamel-covered wire is consistent.

Description

High frequency lead

Technical field

The utility model is related to lead technology field, more particularly to a kind of high frequency lead.

Background technology

Wire is generally all operated under alternating magnetic field or turns on alternating current, and the higher hamonic wave of many can be also carried sometimes. In these cases because wire is influenceed by eddy current effect and Kelvin effect etc., wire will can produce alternating electromagnetic loss, The alternative frequency of magnetic field and electric current is higher, and its loss is bigger.In order to solve this problem, reduction wire cross-section area is reduction The maximally effective method of high-frequency loss.We generally use the wire of many mutually insulateds and even used, in same conductive section Under product, the sectional area of solid conductor is reduced, high frequency magnetic field or electric current can be effectively reduced and higher hamonic wave causes to wire Loss.The sectional area of solid conductor is smaller, and its loss is lower.Make because wire is usually made various coils With it is difficult to accomplish that the length of each wire is consistent that multiple conducting wires are used in the winding process of coil and are wound in technique, and this is just The magnetic field intensity that each wire can be caused and be coiled into after coil in stray field is different, so that different induced voltages are induced, Circulation is formed in parallel conducting wire, unnecessary loss is also just generated, makes wire be difficult to reach the low-loss purpose of drop.Simultaneously Because wire does not have well-regulated several paralleled conductor, wire can not be molded, also the coiling of inconvenient coil.

Utility model content

The utility model purpose is to disclose a kind of high frequency lead, to effectively reduce high frequency magnetic field or electric current and high order Harmonic wave caused by wire to being lost.

To achieve the above object, the utility model discloses a kind of high frequency lead, including at least two strands bundle conductors, each wire All enamel-covered wires in beam are isometric and in staggeredly transposition is arranged in braided between arranged in parallel, and each bundle conductor；Wherein respectively lead The quantity of enamel-covered wire in wire harness is consistent, and the specification of each enamel-covered wire is consistent.

It is preferred that, above-mentioned high frequency lead is in flat, and the quantity of bundle conductor is that the enamel-covered wire in 2, each bundle conductor is arranged into One row.

The utility model has the advantages that：

Can sectional area of wire as needed size, using enamel-covered wire is different and even radical and different line footpaths, do Go out the high frequency lead of different cross-sectional, to meet the demand under various operating modes；And can be essentially ensures that in the high frequency lead Every and even enamel-covered wire length in coil-winding process is consistent, realize effectively transposition, it is ensured that every enamel-covered wire, which is realized, to flow Purpose, and then Kelvin effect and eddy-current loss are preferably minimized.

Below with reference to accompanying drawings, the utility model is described in further detail.

Brief description of the drawings

The accompanying drawing for constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model Schematic description and description is used to explain the utility model, does not constitute to improper restriction of the present utility model.In accompanying drawing In：

Fig. 1 is the knitting twill schematic diagram of the high frequency lead of the utility model preferred embodiment；

Fig. 2 is the preparation method flow chart of high frequency lead disclosed in the utility model preferred embodiment.

Embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

Embodiment 1

The utility model embodiment is disclosed in a kind of high frequency lead, including at least two strands bundle conductors, each bundle conductor first All enamel-covered wires are isometric and in staggeredly transposition is arranged in braided between arranged in parallel, and each bundle conductor；In wherein each bundle conductor Enamel-covered wire quantity it is consistent, the specification of each enamel-covered wire is consistent.

It is preferred that, as shown in figure 1, the quantity of the bundle conductor of the high frequency lead is 2, the enamel-covered wire in each bundle conductor is arranged into Braiding processing is carried out by the staggeredly twill technique of copper litz wire between one row, two bundle conductors.Wherein, the high frequency lead can be with The weaving of copper litz wire is woven into flat, facilitates coiling and realizes the high frequency lead quilt by the transposition during braiding When turning to coil, it is ensured that and around length it is basically identical.

What deserves to be explained is, existing copper litz wire uses high-quality circular copper wire or tin plating soft circular copper wire with many stock-traders' know-how individual layers Or it is multi-layer braided into, its solve pliability, radiating, bend and conductance and it is easy for installation the problems such as.And the utility model is then The problems such as Kelvin effect and eddy-current loss being solved with it.Concrete principle is as follows：

First, to the solution of Kelvin effect

When alternating current flows through conductor, the sense of current is alternately to change, electric current produced alternating magnetic field in the conductor To the repulsion active force of electric charge, the surface of current charge conductor 801 is forced to be concentrated so that the actually active current carrying area of conductor subtracts It is small.When alternating current flows through conductor, occurs the Kelvin effect of phenomenon, referred to as alternating current that electric current conductor 801 surface is concentrated； Electric current leaves the degree that conductor current-carrying face center is concentrated to surface, can be weighed with Kelvin effect depth.Kelvin effect depth It can be expressed as：

Note：In formula, f is the frequency (Hz) of electric current, and k is constant (copper conductor is 1)

As shown from the above formula, frequency is higher, and Kelvin effect depth is smaller, electric current leave conductor current-carrying face center to table The degree that face is concentrated is higher, and the utility model is in parallel using multiply fine rule, and fine rule is the enamel-covered wire of tape insulation, i.e., by a wire Or several heavy in section product wires are divided into many stock small sectional area conductors parallel connections, effectively prevent the influence that Kelvin effect is brought, So replacing solid wire can be minimized the influence of the Kelvin effect of alternating current using the parallel connection of multiply fine rule.

2nd, to the solution of eddy-current loss：

When wire is among longitudinal leakage magnetic flux, it can produce and be vortexed at the section of wire, produced by longitudinal leakage magnetic flux Vortex conductor cross-section distributional assumption vortex be uniformly distributed in conductor cross-section, according to infitesimal analysis method, can obtain at this Simplification eddy-current loss calculation formula in the range of conductor cross-section：

Wherein：ρ_rFor resistance coefficient Ω mm2/m；R is that wire density kg/dm, G are wire weight, kg；B_xIt is close for magnetic, T； α is the thickness of the conductor infinitesimal taken, mm.

The utility model is in parallel using multiply fine rule, and fine rule is the enamel-covered wire of tape insulation, reduces the thickness of wire, i.e. whirlpool The α in loss calculation is flowed, eddy-current loss is preferably minimized.

To sum up, the present embodiment can be essentially ensures that every in high frequency lead and connect enamel-covered wire in coil-winding process Length is consistent, realizes effectively transposition, it is ensured that every enamel-covered wire realizes the purpose flowed, and then Kelvin effect and eddy-current loss are dropped To minimum.And the present embodiment can sectional area of wire as needed size, using enamel-covered wire is different and even radical and not Same line footpath, makes the high frequency lead of different cross-sectional, to meet the demand under various operating modes；Specific preparation method such as Fig. 2 institutes Show, including：

Step S1, determine according to the performance indications of Kelvin effect and eddy-current loss the sectional area size of enamel-covered wire, to equal The quantity of enamel-covered wire in the quantity of the bundle conductor of stream and each bundle conductor；Enamel-covered wire in wherein each bundle conductor is isometric and quantity one Cause, the specification of each enamel-covered wire is consistent.

Step S2, transposition that each bundle conductor interlocks in braided are arranged into high frequency lead.Preferably, the high frequency lead is led The quantity of wire harness is that the enamel-covered wire in 2, each bundle conductor is arranged into a row, to cause made high frequency lead to be in flat, side Just the coiling of coil.

Further, following Experimental comparisons are relied on further to verify the performance of the utility model high frequency lead.Testing scheme To turn to inductance using different line gauges and in conjunction with cross section wire parallel connection, electric current is passed to after inductance series connection, each inductance is contrasted Temperature rise, inductance parameters such as table 1 below, corresponding test temperature rise result such as table 2：

Table 1：

Table 2：(environment temperature：17℃)

In table 1, the total sectional area of wire is for enamel-cover cross-sectional area and and around the product of enamel-covered wire radical.Can from table 2 Know, under conditions of wire total sectional area is basically identical, different line gauges and in conjunction with section conductor coiling inductance 8A electric currents, Temperature rise under the conditions of the equal number of plies and the number of turn etc. have it is significantly different, wherein temperature rise it is minimum for single smallest cross-sectional it is (a diameter of Φ 0.17) conductor coiling inductance, the order in such as table 2 from left to right, with the increase that enamel-covered wire section of diameter is accumulated, its temperature Rise and be stepped up, and the temperature rise highest of solid conductor, wire is accumulated compared to the utility model by Φ in existing Φ 1.5 heavy in section The high frequency lead that 0.17 enamel-cover line parallel is formed, the test temperature difference of 100 minutes is up to 44K, conforms exactly to this patent institute practical New content.It is worth noting that the harmonic content for the electric current that inductance is passed to is less than 3% in experiment, if changing to harmonic content more Big test environment, can more embody the technical advantage of the utility model patent.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (2)

1. a kind of high frequency lead, it is characterised in that including at least two strands bundle conductors, all enamel-covered wires in each bundle conductor are isometric simultaneously In staggeredly transposition is arranged in braided between arranged in parallel, and each bundle conductor；The quantity one of enamel-covered wire in wherein each bundle conductor Cause, the specification of each enamel-covered wire is consistent, and the enamel-covered wire in each bundle conductor is arranged into a row.

2. high frequency lead according to claim 1, it is characterised in that the high frequency lead is in flat, the bundle conductor Quantity be 2.