CN206819832U - The EMI common mode inductances of new winding - Google Patents

Abstract

The utility model discloses a kind of EMI common mode inductances of new winding, belong to common mode inductance coil field.The EMI common mode inductances of above-mentioned new winding include toroidal core and two windings and four lead ends in the toroidal core both sides symmetric position coiling, and each winding is multistage winding, and the coiling number of plies of every section of winding is multilayer；2 lead ends of each winding are located at the both ends of winding respectively, and one of lead end is located at winding innermost layer, and another lead end is located at winding outermost layer.The utility model is on the basis of butterfly winding, and a kind of new winding EMI inductance of achievable automation on the premise of EMI effects are ensured realizes Automated winding, effectively improves production efficiency, greatly save manpower, fraction defective is reduced, product cost is reduced, realizes client and supplier's win-win.

Description

The EMI common mode inductances of new winding

Technical field

It the utility model is related to the annular common mode inductance coil production field of operation in power electronic circuits, and in particular to one The EMI common mode inductances of the new winding of kind.

Background technology

EMI common mode inductances are rotating around two groups of lines on ferrite bead, and winding typically has c-type winding, Z-type winding, butterfly Three kinds of shape winding, wherein with most, EMI effects it is best for butterfly winding, typically constitute from more than the 70% of market ratio.

When inductance component is operated under high frequency state, distribution capacity will produce very to the working condition of inductance component Big influence, waveform is such as caused to produce vibration, EMC variation, inductance component heating, so as to produce very big shadow to its performance Ring.Wherein, the parasitic parameter of inductance component is mainly leakage inductance and distribution capacity.

Inventor, which studies, to be found, designer is often only subject to when designing inductance component to the leakage inductance of inductance component Pay attention to.However, in high pressure small-power occasion, the operation characteristic and efficiency meeting of the distribution capacity of inductance component to inductance component Have a significant impact, it is very important.The especially passing influence because overcoming distribution capacity with butterfly winding, now because need to automation When producing and having the difficulty of execution, how the factor to affect of analysis distribution electric capacity, and by reducing the influence of distribution capacity, and energy Implement just to seem quite important with the means of automated production.

Distribution capacity is broadly divided into 4 parts：Winding inter-turn electric capacity, layer capacitance, winding electric capacity, stray capacitance, because of electricity The demand of component design is felt in several parameters for reducing distribution capacity, such as：Increase line-spacing (using three layer insulation wire), hand over Fork winding (ring-like to be considered without this), interlayer dielectic use (ring-like to be considered without this) to become non-availability, have the change from coiling only Change to reduce the influence of distribution capacity, play the due function of inductance component.

Report in the prior art on the method for winding of common mode inductance is as follows：

Patent CN104299770A discloses a kind of cross clock-type method for winding of annular common mode inductance, and it is in amorphous or iron The winding of the both sides difference identical group of number of coiling of the toroidal cores such as oxysome, one group of winding one end reserves certain length, from 6 points Around 12 shop fixtures, then unroll to 9 points, then unroll from 9 points to 12 points, another side, around 9 points, then is unrolled to 6 points from 6 points；Separately Outer one group of winding one end reserves same length, from 6 points around 12 shop fixtures, then unrolls to 3 points, then from 3 points around 12 points, In addition while from 6 points around 3 points, then unroll to 6 points.

Although general butterfly-type winding can meet the electromagnetic interference requirement of annular common mode inductance, multilayer butterfly winding will Ask butterfly attractive in appearance, the bad phenomenons such as coiling is inclined, closing in is small, coiling unrest, the line that collapses easily occur, while Automated winding can not be realized, And it is more to the technical requirements of staff, it otherwise can not ensure EMI effects, general new employee needs 2-3 months could be skilled Coiling technical ability is grasped, during which causes lot of materials to waste, so as to increase cost.It is limited to rising around mode and coiling for middle separated time Distribution mode, butterfly coiling can not be realized using machine, as the increase year by year of cost of labor, cost pressure are increasing.

Utility model content

To solve problems of the prior art, a kind of anti-electromagnetic interference capability of the utility model offer is strong, work people A kind of EMI common mode inductances for new winding that member's skill set requirements are low, cost is low, can be realized by Automated winding.

In order to solve the above technical problems, the utility model offer technical scheme is as follows：

The utility model provides a kind of EMI common mode inductances of new winding, including toroidal core and in the toroidal core Two windings and four lead ends of both sides symmetric position coiling, each winding are multistage winding, every section of winding around preparative layer Number is multilayer；2 lead ends of each winding are located at the both ends of winding respectively, and it is most interior that one of lead end is located at winding Layer, another lead end are located at winding outermost layer.

Further, the coiling number of plies of every section of winding is odd-level.

Preferably, the coiling number of plies of every section of winding is 3 layers, 5 layers or 7 layers.

Further, the hop count of the multistage winding is more than 2 sections, you can thinks 5,6,7,8,9 ... N sections.

Preferably, the coiling of adjacent two layers coil is in opposite direction in every section of winding.

Further, the coiling direction of adjacent two sections of windings is identical in each winding.

Further, the lead end positioned at winding innermost layer of two windings position on the toroidal core is relative.

The utility model also provides a kind of winding method of the EMI common mode inductance multistage windings of above-mentioned new winding, including： One end of wire first reserves certain length and fixation, as a lead end；The other end is in one direction along annular magnetic The fixing turn of core coiling one, then the opposite direction coiling identical number of turns, the then coiling identical number of turns clockwise again, formed one section around Group；Then multistage coiling is repeated close to one section of described winding.

The utility model provides a kind of EMI common mode inductances of new winding, has the advantages that：

1) EMI that the utility model passes through the multisection type winding coiling such as two-part, three-stage, four-part form, five-part form winding Common mode inductance is different from traditional butterfly winding, this special method for winding, changes the distribution of copper cash, effectively greatly reduces Distribution capacity and stray capacitance, its EMI effect reach the common mode inductance that even better than butterfly winding obtains；

2) the utility model is by fixing one section of coiling common mode inductance of wire, and closely by one section of coiling, winding method is simple, Relatively low is required to staff, learning cycle is short, can faster participate in producing, so as to cost-effective；

3) the utility model enters line by one end, and Automated winding can be achieved, and obtained properties of product are significantly better than personnel Operation, while improves production efficiency, reduces processing procedure difficulty, with the technology production after existing and improvement with a product, often Production 1pcs products winding process can save for about 85% man-hour, averagely can about improve 60% overall production daily Efficiency；

4) on the basis of the utility model is butterfly winding, resist accessible not less than even better than butterfly winding is being ensured A kind of new winding EMI inductance of achievable automation on the premise of EMI effects.Line is entered by one end of product, it is appropriate to use Multisection type winding, reach required anti-EMI filter effect.Automated winding is realized, effectively improves production efficiency, greatlys save people Power, fraction defective is reduced, reduce product cost, realize client and supplier's win-win.

Brief description of the drawings

Fig. 1 is butterfly winding schematic diagram in the prior art；

Fig. 2 is five sections of winding schematic diagrames of EMI common mode inductances of new winding of the present utility model；

Fig. 3 is the EMI curves of butterfly winding common mode inductance in the prior art；

Fig. 4 is the EMI curves of the EMI common mode inductances of five sections of winding coilings of the utility model.

Embodiment

To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail.

The utility model provides a kind of EMI common mode inductances of new winding, as shown in Fig. 2 including toroidal core 1 and in ring Two windings 3,5 and four lead ends 2,4,6 and 7 of the both sides symmetric position coiling of shape magnetic core 1, each winding 3 or 5 is multistage Winding 31,32,33,34 and 35, the coiling number of plies of every section of winding is multilayer；2 lead ends of each winding be located at respectively around The both ends of group, one of lead end are located at winding innermost layer 2 (or 7), and another lead end is located at winding outermost layer 4 (or 6).

Inventor has found that fixed one end carries out coiling, it is possible to achieve Automated winding, but the common mode inductance formed is anti- Electromagnetic interference capability is unable to reach the electromagnetic interference requirement of annular common mode inductance.On the basis of the utility model is butterfly winding, It is new not less than a kind of achievable automation on the premise of the even better than accessible anti-EMI filter effect of butterfly winding in guarantee Winding EMI inductance.Line is entered by one end of product, suitably using multisection types such as two-part, three-stage, four-part form, five-part form windings Winding, reach required anti-EMI filter effect.Automated winding is realized, effectively improves production efficiency, greatlys save manpower, is reduced Fraction defective, product cost is reduced, realizes client and supplier's win-win.

Further, the coiling number of plies of every section of winding is odd-level；Preferably, the coiling number of plies of every section of winding be 3 layers, 5 layers or 7 layers；Odd-level coiling reduces the waste that wire in next section of winding process is carried out after complete every section, coiling and disorderly etc. asked The appearance of topic.

Further, the hop count of each winding is more than 5 sections, on the premise of the EMI effects for reaching required, saves material Material.

Preferably, the coiling of adjacent two layers coil is in opposite direction in every section of winding, avoids wire waste, coiling unrest etc. from asking Topic.

Further, in order to there is a more preferable anti-electromagnetic interference capability, the coiling direction of adjacent two sections of windings is identical；Two around That organizes is relative positioned at lead end 2 (or 7) position on toroidal core of winding innermost layer.

The EMI common mode inductances for the new winding that the common mode inductance and the utility model prepared to existing butterfly winding obtains enter The impedance of row leakage inductance and Electromagnetic Interference Test, leakage inductance impedance test results are shown in Table 1, and Electromagnetic Interference Test is shown in Fig. 3-4.

Table 1

As seen from the above table, under the conditions of same test, the EMI common mode inductance leakage inductance impedance numbers of multistage winding of the present utility model Value is not less than the common mode inductance that even better than in the prior art prepared by butterfly winding；Understood by Fig. 3-4 of the present utility model new EMI effect of the EMI common mode inductances of winding better than common mode inductance prepared by butterfly winding.Although required in industry in 0dB Meet EMI demands, but in order to which product has more preferable competitiveness, typically require that EMI effects are less than -6dB, it is directly perceived for, one Within the scope of fixed, i.e. the marking line of product E MI curve distances -6dB is that lower limit curve is more remote better, now only needs to compare EMI songs Near the point of lower limit curve, i.e., the points such as 2,3,4,5,6 marked in figure, by comparing butterfly winding and multisection type winding on line The position of each point in EMI curve maps, the EMI effects of multisection type winding are better than butterfly winding.

The utility model also provides a kind of winding method of the EMI common mode inductance multistage windings of above-mentioned new winding, first One end of wire reserves certain length and fixation, as a lead end；The other end in one direction along toroidal core around The fixing turn of line one, then the opposite direction coiling identical number of turns, then the coiling identical number of turns clockwise again, forms one section of winding；So Afterwards multistage coiling is repeated close to one section of described winding.The multisection type winding mode set is inputted coiling by equipment operator Equipment control terminal, parameter is debugged and Automated winding can be achieved, then dividing plate, dispensing, baking, assembling bottom are assembled via back segment Seat, the series of processes such as test, get ready, completing the EMI common mode inductances of multisection type winding.This programme in production technology with it is existing Technology compares, and realizes and further improves；Later stage production craft step is similar, in the coiling stage, is introduced directly into automated production, Complete the automated production of whole inductance.One end coiling realizes Automated winding, and the stability and uniformity of machine are significantly excellent In human users, the bad phenomenons such as coiling is inclined, closing in is small, coiling unrest, the line that collapses can be effectively reduced, so as to reduce unnecessary heavy industry With scrap；Production efficiency gets a promotion, and using multisection type winding, can promote and realize automation, drastically increases production effect Rate, reduce processing procedure difficulty.

On the basis of the utility model is butterfly winding, ensure it is accessible not less than even better than butterfly winding anti- A kind of new winding EMI inductance of achievable automation on the premise of EMI effects.Line is entered by one end of product, it is appropriate to use The multisection type windings such as two-part, three-stage, four-part form, five-part form winding, reach required anti-EMI filter effect.Realize automation Coiling, production efficiency is effectively improved, greatly save manpower, reduce fraction defective, reduced product cost, realize that client is total to supplier Win.

Above is preferred embodiment of the present utility model, is not used to limit the scope of protection of the utility model.Should Point out, for those skilled in the art, on the premise of the utility model principle is not departed from, can also make Go out some improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (7)

1. a kind of EMI common mode inductances of new winding, including toroidal core and in the toroidal core both sides symmetric position coiling Two windings and four lead ends, it is characterised in that each winding is multistage winding, and the coiling number of plies of every section of winding is Multilayer；2 lead ends of each winding are located at the both ends of winding respectively, and one of lead end is located at winding innermost layer, another Individual lead end is located at winding outermost layer.

2. the EMI common mode inductances of new winding according to claim 1, it is characterised in that the coiling number of plies of every section of winding It is odd-level.

3. the EMI common mode inductances of new winding according to claim 2, it is characterised in that the coiling number of plies of every section of winding For 3 layers, 5 layers or 7 layers.

4. the EMI common mode inductances of new winding according to claim 1, it is characterised in that the hop count of the multistage winding For more than 5 sections.

5. the EMI common mode inductances of new winding according to claim 1, it is characterised in that adjacent two layers in every section of winding The coiling of coil is in opposite direction.

6. the EMI common mode inductances of new winding according to claim 1, it is characterised in that adjacent two sections in each winding The coiling direction of winding is identical.

7. the EMI common mode inductances of new winding according to claim 1, it is characterised in that two windings are located at winding The lead end of innermost layer position on the toroidal core is relative.