CN109427471A - Coil device - Google Patents

Abstract

The present invention provides a kind of coil device that Magnetic leakage characteristics are stable.The coil device includes first coil portion (301)；Second coil part (302) is constituted using shared coiling (38) identical with the coiling of first coil portion (301) is constituted and is dividually configured along wireline reel and first coil portion (301)；Intermediate coil portion (303) is located between first coil portion (301) and the second coil part (302) along wireline reel and is constituted using the intermediate coiling (37) different with shared coiling (38).Intermediate coiling (37) α is wound in skeleton (20).

Description

Coil device

Technical field

The present invention relates to can be suitably used as the coil device of the isallobaric device of such as leakage transformer.

Background technique

Coil device is with various uses in various electric equipment products.For example, in EV (Electric Vehicle: electronic Vehicle), PHV (Plug-in Hybrid Vehicle: plug-in hybrid-power automobile) or commuting the vehicle-mounted of (vehicle) fill In electric appliance or LLC circuit etc., the transformer using coil device, and be typically used as leakage transformer etc..

As coil device, it is known that coil device shown in patent document 1 shown in for example following.1 institute of patent document In the coil device shown, it is easy to carry out the adjustment of Magnetic leakage characteristics, is both able to achieve high current, also copes with high frequency.

But in coil device shown in patent document 1, confirm: in primary coil and secondary coil along wireline reel side More inferior than different situations to the winding number for being adjacent to arrangement and these, the coupling between these coils is easy to be lower, sometimes leakage field Characteristic is unstable.Magnetic leakage characteristics in particular, in recent years, with the high frequency for the voltage for being applied to coil device, under high frequency band Stabilization become the technical issues that need to address.

[existing technical literature]

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2015-65413 bulletin

Summary of the invention

[technical problems to be solved by the invention]

The present invention is researched and developed in view of this actual conditions, it is intended that providing a kind of line that Magnetic leakage characteristics are stable Coil apparatus.

[for solving the technical solution of technical problem]

To achieve the goals above, the present invention provides a kind of coil device, which is characterized in that

It includes

First coil portion；

Second coil part is constituted using shared coiling identical with the coiling for constituting the first coil portion, and along Wireline reel is dividually configured with the first coil portion；

Intermediate coil portion along the wireline reel between the first coil portion and the second coil part, and utilizes The intermediate coiling different from the shared coiling is constituted,

The intermediate coiling α is wound in skeleton.

Coil device of the invention is the structure that intermediate coil portion is clamped using first coil portion and the second coil part.Cause This, can be improved the coupling between these coils, easily realize the stabilisation of Magnetic leakage characteristics.In addition, can be realized even if in height Frequency band can also obtain the coil device of stable Magnetic leakage characteristics.

In particular, intermediate coiling α is wound in skeleton in coil device of the invention.For α winding, even if increasing volume Winding number can also reduce the number of plies in spool direction, therefore, facilitate slimming, the miniaturization of coil device.In addition, by setting For α winding, the coiling from winding central part, which is drawn, to disappear, and therefore, coiling will not be overlapped, and therefore, facilitate coil device Slimming.

In addition, by being set as α winding, facilitating the stabilisation of Magnetic leakage characteristics in intermediate coil portion.In addition, in medium line The winding number of coil easily can be set as identical by each interlayer in circle portion, in addition, can also easily vary winding number.

In addition, first coil portion and the second coil part are continuously formed using shared coiling.By being set as this knot Structure can prevent electric current to be biased to either first coil portion and the second coil part and be flowed.Since electric current can be prevented Skewed popularity flowing, therefore, can prevent the coil part of either one from generating heat singularly.In addition, from being made of different coilings The case where one coil part and the second coil part, is compared, and the shared coiling for constituting first coil portion and the second coil part can be shortened Winding length, and copper loss (copper loss) can be reduced.If copper loss can be reduced, efficiency can be improved, moreover it is possible to reduce Fever.

It is preferred that the shared coiling α is wound in the skeleton.By being set as this structure, be able to use it is single share around Line, and it is readily formed first coil portion and the second coil part along winding axis direction separate configuration.In addition, also can be easily The winding number of coil is set as identical in first coil portion and the second coil part, in addition, can also easily vary winding number.

In addition, in first and second coil part, there is only in a manner of single coiling, to adjust bone along winding axis direction The interval of the flange part of frame facilitates Magnetic leakage characteristics thereby, it is possible to be easily prevented from the unevenness of the winding number of each layer of coiling Stabilisation.That is, can be easily implemented the strict control of the coefficient of coup of primary coil and secondary coil.

In addition, even if increasing winding number, can also reduce the number of plies in spool direction in α winding, therefore, facilitate coil Slimming, the miniaturization of device.In addition, the coiling from winding central part, which is drawn, to disappear by being set as α winding, and therefore, coiling It will not be overlapped, therefore, facilitate the slimming of coil device.

It is preferred that: the shared coiling has between the first coil portion and second coil part along the wireline reel Interconnecting piece between the coil that direction extends also has first for interconnecting piece between the coil and the intermediate coil portion to insulate Insulating boot.In coil device of the invention, first coil portion and the second coil part are continuously formed using shared coiling, because This, is formed between first coil portion and the second coil part on sharing coiling and connects between the coil that winding axis direction extends Portion.In a manner of interconnecting piece is isolated with intermediate coil portion between to make coil, the first insulating boot is set between, and thereby, it is possible to reliable Realize the insulation of the two in ground.

It is preferred that: first insulating boot has the first cover portion and the second cover portion,

It is formed in described in such a way that the intermediate coiling is isolated with the shared coiling in first cover portion Between the first access for passing through of coiling,

It is formed in a manner of by the isolation of the leading part of the shared coiling and the intermediate coiling in second cover portion The alternate path for thering is the shared coiling to pass through；Also,

In second cover portion, in such a way that the leading part of the intermediate coiling to be isolated with the shared coiling, formed There is the leading part of the intermediate coiling to pass through third path.

By being set as this structure, intermediate coiling shares coiling and passes through alternate path by the first access, intermediate coiling Leading part passes through third path.In this way, the leading part of intermediate coiling, shared coiling and intermediate coiling passes through different lead to respectively Road, and each access be it is segregate, therefore, the lead that intermediate coiling can be reliably achieved, share coiling and intermediate coiling The mutually insulated in portion.

By making the first insulating boot have the first access, under the premise of not making coil device enlarged, it will be able to sufficiently Ensure the creepage distance between intermediate coiling and shared coiling.In addition, by making the first insulating boot have alternate path and third Access, under the premise of not making coil device enlarged, it will be able to substantially ensure intermediate coiling leading part and shared coiling it Between creepage distance.

First cover portion and second cover portion can also be constituted by loading and unloading freely.That is, the first insulating boot can To be configured to: the first insulating boot is the first cover portion and the second cover portion by physically separation (segmentation), and by keeping these each Combines and constitute the first insulating boot to a cover portion integraty.By manufacturing the first cover portion and the second cover portion respectively, forming becomes to hold Easily.

It is preferred that interconnecting piece passes through the inside in the intermediate coil portion between the coil.Firstly, constituting the using coiling is shared Intermediate coiling is then wound in skeleton and constitutes intermediate coil portion, passed through as a result, by one coil part and the second coil part Interconnecting piece between the coil of the inside in intermediate coil portion.

In addition, being contemplated such as under type: firstly, winding intermediate coiling, constituting intermediate coil portion；Then, winding shares Coiling constitutes first coil portion and the second coil part.In this case, the outside that interconnecting piece passes through intermediate coil portion between coil.

It is preferred that: the leading part of the shared coiling has the rising portions extended along the winding axis direction, also has and is used for By the second insulating boot of the rising portions and intermediate coil portion insulation.In rising portions in being brought out above coil On the way, in a manner of being isolated with intermediate coil portion, the second insulating boot is set between rising portions and intermediate coil portion, thereby, it is possible to It is reliably achieved the insulation of the two.

It is preferred that: either in the shared coiling composition primary coil or secondary coil, the intermediate coiling is constituted just Any another party in grade coil or secondary coil.With this configuration, first coil portion and the second coil part can be set as Intermediate coil portion is simultaneously set as secondary coil by primary coil, alternatively, intermediate coil portion can be set as to primary coil and by One coil part and the second coil part are set as secondary coil.

Detailed description of the invention

Fig. 1 is the perspective view of the transformer of the coil device as one embodiment of the present invention.

Fig. 2 is the exploded perspective view of transformer shown in FIG. 1.

Fig. 3 A is the major part sectional view along the transformer of IIIA-IIIA line shown in FIG. 1.

Fig. 3 B is the major part sectional view along the transformer of IIIB-IIIB line shown in FIG. 1.

Fig. 4 is the perspective view of skeleton of transformer shown in FIG. 1 etc..

Fig. 5 A is the perspective view of first insulating boot of transformer shown in FIG. 1 etc..

Fig. 5 B is another perspective view of first insulating boot of transformer shown in FIG. 1 etc..

Fig. 5 C is the perspective view of second insulating boot of transformer shown in FIG. 1 etc..

Fig. 6 A is the first coil portion of transformer shown in FIG. 1 and the perspective view of the second coil part.

Fig. 6 B is the first coil portion of transformer shown in FIG. 1 and the side view of the second coil part.

Fig. 7 is the circuit diagram for indicating the equivalent circuit of transformer shown in FIG. 1.

Symbol description

10 ... transformers

20 ... skeletons

21 ... skeleton main bodys

21a ... core leg through hole

22,23 ... terminal bases

221,231 ... sidewall portions

222,232 ... fasteners

223 ... separation protrusions

224,234 ... engaging protrusion portions

24,25 ... end bulkheads flanges

244 ... notch

26 ... winding bulkhead flanges

26a ... the first volume is around bulkhead flange

26b ... volume Two is around bulkhead flange

26c ... third winds bulkhead flange

261a, 261c ... spot facing

264a, 264b, 264c ... notch

28 ... winding canister portions

29 ... exoskeleton legs

300 ... coil parts

301 ... first coil portion

302 ... second coil parts

303 ... intermediate coil portions

37 ... intermediate coilings

37a, 37b ... first lead portion

Interconnecting piece between 370 ... coils

371a, 371b ... rising portions

372a, 372b ... direction change portion

373a, 373b ... draw main part

38 ... share coiling

The second leading part of 38a, 38b ...

381a, 381b ... rising portions

382a, 382b ... direction change portion

383a, 383b ... draw main part

Interconnecting piece between 380 ... coils

40a, 40b ... magnetic core

44a, 44b ... basal part

The middle leg 46a, 46b ...

The side 48a, 48b ... leg

50 ... covers

52 ... cover main body portions

54 ... hooking sheets

56 ... side leg guide pins

60 ... draw around irdome

70 ... pedestals

81 ... first insulating boots

811 ... first part's flanges

812 ... second part flanges

813 ... middle section flanges

814 ... upper section flanges

815 ... middle sections cylinder

816 ... vertical component effects

817 ... first lateral vertical sections

818 ... second lateral vertical sections

819 ... separation convex shaped parts

The first access of 820a ...

820b ... alternate path

820c ... third path

82 ... second insulating boots

821 ... first part's flanges

822 ... second part flanges

823 ... wall portions

824 ... sides

825 ... protrusions

83,84 ... insulation boards

90 ... shells

91 ... shaft hubs

92 ... bottom plates

94 ... terminals

100 ... heat transmission top plates

Specific embodiment

Hereinafter, embodiment based on the figure illustrates the present invention.

The transformer 10 of coil device as present embodiment shown in FIG. 1 can be used for such as EV (Electric Vehicle: electric vehicle), PHV (Plug-in Hybrid Vehicle: plug-in hybrid-power automobile) or commuting (vehicle) Vehicle-mounted charger etc. uses to constitute such as a part of LLC circuit.

As shown in Fig. 2, the transformer 10 includes skeleton 20, magnetic core 40a and 40b, cover 50, draws around irdome 60, pedestal 70 and they are contained in internal shell 90 (referring to Fig. 3 A), bottom plate 92, insulation board 83,84.In addition, in attached drawing, X-axis, Y-axis and Z axis are mutually perpendicular to, and Z axis corresponds to the height (thickness) of transformer 10.In present embodiment, the Z-direction of transformer 10 Lower section become transformer setting face.In addition, Y-axis is consistent with the longitudinal direction of basal part 44a, 44b of magnetic core 40a, 40b. In addition, X-axis is consistent with the longitudinal direction of skeleton 20.

In present embodiment, as shown in Figure 1, bottom plate 92 is installed on the bottom opening of shell 90 in a manner of riveting or be bonded etc. Portion, to constitute the open shell 90 in top.Bottom plate 92 is preferably made of metals such as the excellent aluminium of thermal diffusivity, copper, iron, but can also To be made of PPS, PET, PBT etc..On bottom plate 92, the lower end surface of the Z-direction of aftermentioned magnetic core 40 is contacted, therefore, Bottom plate 92 is preferably made of the excellent material of thermal diffusivity.In the lower section of shell 90, via bottom plate 92 or can also be mounted directly cold But the cooling device of conduit, cooling fin etc..

Shaft hub 91 has been formed about in the middle part of the Z-direction in four corners of shell 90.In the formation of shaft hub 91 The notch for having such as bolt hole or extending along Z-direction.90 ontology of shell consists of metal, but can also be by synthetic resin etc. It constitutes.In addition it is also possible to which bottom plate 92 and shell 90 is formed integrally by the casting forming of aluminium etc..By consisting of metal Shell is whole, can be further improved thermal diffusivity.

Heat transmission resin can also be filled to the inside of shell 90.It as heat transmission resin, is not particularly limited, but preferably For the resin that the thermal diffusivity that such as pyroconductivity is 0.5~5W/mK (preferably 1~3W/mK) is excellent.It is excellent as thermal diffusivity Different resin, such as with silicone resinoid, polyurethane based resin, epoxylite etc., wherein it is preferably silicone resin, poly- Urethane resin.In addition, the high filler of heat conductivity can also be filled into resin in order to improve thermal diffusivity.

In addition, the Shore A hardness of the heat transmission resin of present embodiment is 100 hereinafter, preferably 60 or less.This be for : even if magnetic core 40a, 40b or skeleton 20 are deformed due to heat, can also absorb the deformation, not to magnetic core 40a, 40b Generate excessive stress.As this resin, potting resin can be exemplified.

As shown in Fig. 3 A and Fig. 3 B, around skeleton 20 21 coiled coil 300 of skeleton main body along coil 300 volume There is first coil portion 301, the second coil part 302, it is located at these first coil portion 301 and the around axis is (substantially parallel with Z axis) Intermediate coil portion 303 between two coil portion 302.That is, in present embodiment, along the wireline reel (Z-direction) of coil 300, Intermediate coil portion 303 is clamped by first coil portion 301 and the second coil part 302.

Intermediate coil portion 303 is made of intermediate coiling 37, and first coil portion 301 and the second coil part 302 are by being used to form The shared coiling 38 of first coil portion 301 and the second coil part 302 is constituted.

In present embodiment, shares coiling 38 and constitute primary coil, intermediate coiling 37 constitutes secondary coil.That is, such as Fig. 7 institute Show, the first coil portion 301 and the second coil part 302 being made of shared coiling 38 become primary side winding, by intermediate coiling 37 The intermediate coil portion 303 of composition becomes primary side winding, forms transformer between the two as a result,.

In present embodiment, apply the voltage higher than secondary coil to primary coil, lower electricity is applied to secondary coil Pressure.Here, La shown in Fig. 7 is leakage inductance.

Coiling 37,38 can also be made of single line respectively, or can also be made of respectively twisted wire, or be also possible to a side and be Single line and another party are twisted wire.Each coiling 37,38 can be made of identical material, can also be made of different materials.It is right The outer diameter of coiling 37,38 is not particularly limited, but the range of preferably 1.0~4.0mm.In present embodiment, in order to make to circulate Become larger in the electric current of secondary coil, the outer diameter of preferably intermediate coiling 37 is bigger than the outer diameter of shared coiling 38, for example, intermediate coiling 37 Outer diameter be 3.0~4.0mm.Additionally, it is preferred that being formed with insulating coating in each coiling 37,38.

First lead portion 37a, 37b shown in FIG. 1 are the both ends of intermediate coiling 37 shown in Fig. 6 A, shown in FIG. 1 the Two leading part 38a, 38b are the both ends that coiling 38 is shared shown in Fig. 6 A.As shown in Figure 1, in first lead portion 37a, 37b and Each end of second leading part 38a, 38b is connected with the terminal 94 being for example made of metal terminal, each coiling by welding etc. 37 and 38 both ends are electrically connected with terminal 94.

As shown in Figure 6A, in present embodiment, first coil portion 301 and the shared coiling 38 in the second coil part 302 Total winding number n1 is equal with total winding number n2 of intermediate coiling 37 in intermediate coil portion 303 is constituted.But n1 and n2 can also With difference, for example, it is also possible to be set as n1 > n2, or n1 < n2 also can be set to.In present embodiment, no matter these winding numbers Ratio (n1/n2) larger situation or lesser situation, can be realized the biggish coefficient of coup, facilitate Magnetic leakage characteristics It stabilizes.

First coil portion 301 and total winding number n1 of the shared coiling 38 in the second coil part 302 are preferably substantially uniform Ground divides to first coil portion 301 and the second coil part 302, but can also be slightly different.That is, sharing in first coil portion 301 The winding number of coiling 38 is preferably (0.3~0.7) × n1, and the winding number of the shared coiling 38 in the second coil part 302 is preferably (0.7~0.3) × n1.This is the coefficient of coup in order to improve primary coil and secondary coil.

As shown in Figure 6B, sharing coiling 38 has between first coil portion 301 and the second coil part 302 along wireline reel (Z Axis) direction extend coil between interconnecting piece 380.In present embodiment, first coil portion 301 and the second coil part 302 are by altogether It is continuously formed with coiling 38, therefore, is formed in shared coiling 38 in first coil portion 301 and the second coil part 302 Between along winding axis direction extend coil between interconnecting piece 380.

As shown in Figure 6B, the inside that interconnecting piece 380 passes through intermediate coil portion 303 between coil.It will be for its detailed content It is described later, but in present embodiment, shared coiling 38 is wound in skeleton 20 first, to constitute first coil portion 301 and second coil part 302 then intermediate coiling 37 is wound in skeleton 20, to constitute intermediate coil portion 303.

In the case where coil 300 is installed on skeleton 20 in this way, interconnecting piece 380 passes through intermediate coil between coil The inside in portion 303.In this case, as shown in Figure 3B, in order to realize between coil between interconnecting piece 380 and intermediate coil portion 303 Insulation, the first insulating boot 81 is installed on skeleton 20.About the first insulating boot 81, will be described in detail in a later process.

As shown in Figure 6B, intermediate coiling 37 has between the first layer and the second layer in intermediate coil portion 303 along wireline reel Interconnecting piece 370 between the coil that (Z axis) direction extends.In present embodiment, the first layer and the second layer in intermediate coil portion 303 be by What intermediate coiling 37 was continuously formed, therefore, it is formed in intermediate coiling 37 in the first layer in intermediate coil portion 303 and second Interconnecting piece 370 between the coil that edge winding axis direction extends between layer.

As shown in Fig. 3 B and Fig. 6 A, from first coil portion 301 and the second coil part 302 draw the second leading part 38a of a pair, 38b.In addition, drawing a pair of of first lead portion 37a, 37b from intermediate coil part 303.

More specifically, as shown in Figure 6A, first lead portion 37a, the 37b for being formed in the both ends of intermediate coiling 37 are included Rising portions 371a, the 371b extended along wireline reel (Z axis) direction of coil 300；Each other towards a pair of of first lead portion 37a, 37b Interval direction change portion 372a, the 372b in direction that broaden；The extraction main body extended along the direction (X-axis) far from coil 300 Portion 373a, 373b.

In addition, first rising portions 371a, 371b relative to Z axis be not necessarily it is parallel, be also possible to inclined.In addition, drawing Main part 373a, 373b is also not necessarily parallel relative to X-axis out, can also be tilted to Y-axis and/or Z-direction.In addition, side To change section 372a, 372b, to be by the direction transformation of rising portions 371a, 371b direction be draws main part 373a, 373b direction The part in direction can be linear, or curve-like.

In present embodiment, to draw more mutual than rising portions 371a, 371b of the mutual interval main part 373a, 373b The mode of gap wider interval is constituted.More specifically, draw the mutual clearance gap W1 of main part 373a, 373b be preferably 1~ 5mm.Clearance gap W1 is more reduced, the leakage field of second siding ring can be more reduced.In addition, drawing the X-axis of main part 373a, 373b The length L1 in direction is preferably 20~100mm.In addition, having the length L1 for the X-direction for drawing main part 373a, 373b longer The then bigger tendency of leakage field, it is therefore preferable that be decreased to necessary minimum limit.

In addition, as shown in Figure 6A, second leading part 38a, the 38b for being formed in the both ends of shared coiling 38 is included along coil Rising portions 381a, 381b that 300 wireline reel (Z axis) direction extends；Towards a pair of second mutual interval leading part 38a, 38b Direction change portion 382a, the 382b in the direction to broaden；The extraction main part 383a of direction (Y-axis) extension of the edge far from coil 300, 383b。

In addition, rising portions 381a, 381b relative to Z axis be not necessarily it is parallel, be also possible to inclined.In addition, drawing master Body portion 383a, 383b relative to X-axis be also not necessarily it is parallel, can also be tilted to Y-axis and/or Z-direction.In addition, and direction Similarly, direction change portion 382a, 382b can be linearly change section 372a, 372b, be also possible to curve-like.

In present embodiment, to draw more mutual than rising portions 381a, 381b of the mutual interval main part 383a, 383b The mode that gap interval broadens is constituted.More specifically, it draws the mutual clearance gap W2 of main part 383a, 383b and draws main body The mutual clearance gap W1 of portion 373a, 373b is roughly equal.In addition, drawing the length L2 of the X-direction of main part 383a, 383b It is roughly equal with the length L1 for the X-direction for drawing main part 373a, 373b.

In addition, in present embodiment, for draw the mutual interval main part 373a, 373b and extraction main part 383a, For the mutual interval 383b, be preferably in the various pieces of its longitudinal direction it is fixed, however, you can also not same.That is, drawing Main part 373a, 373b or extraction main part 383a, 383b are not necessarily to extend parallel to.But from realize transformer 10 it is good From the viewpoint of good Magnetic leakage characteristics, preferably reduces and draw the mutual clearance gap W1 of main part 373a, 373b, and between gap It along longitudinal direction is fixed every W1.

As shown in figure 4, skeleton 20 includes the both ends of skeleton main body 21, the X-direction for being integrally formed in skeleton main body 21 The terminal base 22,23 on top.Skeleton 20 is made of the plastics of such as PPS, PET, PBT, LCP, nylon etc., but can also be by other Insulating element constitute.But in present embodiment, as skeleton 20, preferably by such as pyroconductivity up to 1W/mK or more Plastics constitute, such as can also be made of PPS, nylon etc..

Terminal base 22,23 have sidewall portion 221,231 and be respectively formed in X-direction both ends a pair of of fastener 222, 232.In sidewall portion 221,231, other than drawing the side of first lead portion 37a, 37b and second leading part 38a, 38b, with packet The mode for enclosing the periphery of terminal base 22,23 is formed.In two outer end walls of the Y direction of sidewall portion 221,231, it is respectively formed with Engaging protrusion portion 224 and 234.About the function in engaging protrusion portion 224,234, will be described in detail in a later process.Terminal base 22, In 23, separation protrusion 223,233 is formed in the middle position of the Y direction of a pair of of fastener 222,232.

As shown in Fig. 4 and Fig. 6 A, in a pair of of fastener 222, erected using rising portions 381a, 381b to Z-direction 38a, 38b are in first lead portion, and in direction change portion, the part of 382a, 382b are wound inwardly from the outside of Y direction, and And to be guided to the outside of X-direction as the state for drawing main part 383a, 383b and mutual gap becomes smaller.

Equally, in a pair of of fastener 232, the first lead portion that is erected using rising portions 371a, 371b to Z-direction 37a, 37b are that the part of 372a, 372b are wound inwardly from the outside of Y direction in direction change portion, also, using as drawing The state that main part 373a, 373b and mutual gap become smaller out, is guided to the outside of X-direction.

When from Z axis, separation protrusion 223 has T-shaped shape.Separating protrusion 223 is for direction change portion The component that 382a, 382b are each other or discontiguous mode separates them between extraction main part 383a, 383b.

When equally, from Z axis, separation protrusion 233 has T-shaped shape.Separating protrusion 233 is for being become with direction The component that change portion 372a, 372b are each other or discontiguous mode separates them between extraction main part 373a, 373b.This Outside, the shape for separating protrusion 223,233 is not limited to the shape of diagram, can also be suitable for changing ovalisation or other polygons Deng.

In addition, as shown in figure 4, in a pair of of fastener 222, the lead that is erected using rising portions 381a, 381b to Z-direction 38a, 38b are in portion, in direction change portion the part of 382a, 382b from the Inside To Outside of Y direction wind, also, using as The state that extraction main part 383a, 383b and mutual gap become larger, is guided to the outside of X-direction.

Equally, in a pair of of fastener 232, the leading part 37a and 37b that are erected using rising portions 371a, 371b to Z-direction Be, in direction change portion the part of 372a, 372b from the Inside To Outside of Y direction wind, also, using as draw main part The state that 373a, 373b and mutual gap become larger, is guided to the outside of X-direction.

It, can be anti-by the way that direction change portion 382a, 382b of leading part 38a, 38b are locked to a pair of of fastener 222 Stop bit is in the state of the uncoiling of the coil part 301,302 of the centre of leading part 38a, 38b, by leading part 38a, 38b to separate It draws in the direction of coil 300.

It equally, can by the way that direction change portion 372a, 372b of leading part 37a, 37b are locked to a pair of of fastener 232 Prevent positioned at leading part 37a, 37b centre coil part 303 first layer and the second layer uncoiling in the state of, by lead Portion 37a, 37b are drawn to the direction far from coil 300.

That is, in present embodiment, as shown in figure 4, being formed on terminal base 22 by sidewall portion 221 and a pair of of fastener 222 divide the access of (or clamping), by these accesses, can draw leading part 38a, 38b to the direction far from skeleton 20.

Equally, the access that (or clamping) is divided by sidewall portion 231 and a pair of of fastener 232 is formed on terminal base 23, By these accesses, leading part 37a, 37b can be drawn to the direction far from skeleton 20.

As shown in Fig. 2, the top of the Z-direction in terminal base 22,23, installation is drawn around irdome 60 in a covered manner. More specifically, it is formed with hole 61 around the side at the Y direction both ends of irdome 60 in extraction, by making the hole 61 and being formed in end The engaging protrusion portion 224,234 of stroma 22,23 engages, and can be installed on terminal base 22,23 around irdome 60 for drawing.As a result, can It enough prevents from first lead portion 37a, 37b and second leading part 38a, 38b to be not required to strategic point in the top of terminal base 22,23 to expose.

In present embodiment, magnetic core 40a, 40b are same shape, have section E word shape in the section Z-Y, it is so-called to constitute E type core.In addition, the mode of magnetic core 40a, 40b are not limited to mode shown in Fig. 2, magnetic core 40a, 40b are also possible to along figure Middle single dotted broken line (substantial middle position of Y direction) and XZ plane divide core made of cutting off in parallel.

It, as shown in Figure 3A, can also will be by the upper surface of covering core 40a in the case that magnetic core 40a, 40b are segmentation core Part and the part that extends to the downside of Z-direction of the gap between core 40a, 40b (leg 46a, 46b) of segmentation constitute Heat transmission top plate 100 be set to magnetic core 40a, 40b.Thereby, it is possible to effectively improve the thermal diffusivity of coil device 10.

As shown in Fig. 2, the magnetic core 40a for being configured at the upside of Z-direction includes the basal part extended along Y direction 44a, from the both ends of the Y direction of basal part 44a to a Z-direction opposite side outstanding leg 48a, these side legs 48a it Between from the center of Y direction to Z-direction middle leg 46a outstanding.The magnetic core 40b for being configured at the downside of Z-direction includes edge Y direction extend basal part 44b, from the both ends of the Y direction of basal part 44b to a Z-direction opposite side outstanding leg 48b, the center between the 48b of these side legs from Y direction are to Z-direction middle leg 46b outstanding.

Middle leg 46a is inserted into the inside of the core leg through hole 21a of skeleton 20 on the upside of Z-direction.Equally, middle leg Portion 46b is inserted into the inside of the core leg through hole 21a of skeleton 20 on the downside of Z-direction, in core leg in through hole 21a Portion is constituted in such a way that their front end is aspectant.In addition, the front end of middle leg 46b is penetrated through in core leg in example illustrated Front end of the preceding end in contact of the inside of hole 21a and middle leg 46a but it is also possible to be front end and middle leg 46b in middle leg 46a Between be formed with scheduled gap (illustration omitted).In this way, by forming gap leakage field can be adjusted according to the width in gap Characteristic.

Middle leg 46a and middle leg 46b by with core leg with the inner peripheral surface shape of through hole 21a it is consistent in a manner of have substantially Elliptic cylindrical shape, but for its shape, there is no particular limitation, can also be become according to core leg with the shape of through hole 21a Change.In addition, side leg 48a, 48b have the consistent inside concave curve surface shape of outer peripheral surface shape with skeleton main body 21, appearance Face has the plane parallel with X-Z plane.In present embodiment, about the material of each core 40a, 40b, metal, iron oxygen can be enumerated The soft magnetic material of body etc., but to it, there is no particular limitation.

As shown in Fig. 2, being each configured between the inner peripheral surface of side leg 48a, 48b and the outer peripheral surface of skeleton main body 21 Cover 50.The shape of the periphery for the skeleton main body 21 that there is the cover main body 52 of cover 50 covering to be located between the terminal base 22 and 23 of skeleton 20 Shape.At the both ends of the Z-direction of cover main body 52, it is integrally formed with to be bent into from cover main body 52 towards skeleton main body 21 and substantially hangs down Histogram to hooking sheet 54.As shown in Figure 3A, a pair of of hooking sheet 54 of the two sides of the Z-direction of cover main body 52 is formed in sandwich The mode of the upper and lower surface of the Z-direction of skeleton main body 21 is installed.

In addition, being integrally formed with respectively in the both ends outer surface of the X-direction of cover main body 52 along the side that Z-direction extends Leg guide pin 56.The outer surface of the inner surface of side leg 48a, 48b and the cover main body 52 between a contralateral leg guide pin 56 Contact, the movement of the X-direction of side leg 48a, 48b are limited by a contralateral leg guide pin 56.These covers 50 utilize and skeleton 20 The insulating element or metal of identical plastics etc. are constituted.

As shown in Fig. 3 A and Fig. 4, constitute skeleton 20 skeleton main body 21 winding canister portion 28 Z-direction both ends, End bulkheads flange 24 and 25 is integrally shaped to substantially flat with X/Y plane in a manner of extending to the foreign side of radial direction Row.In the outer peripheral surface of the winding canister portion 28 between end bulkheads flange 24 and 25 Z-direction, winding bulkhead flange is constituted 26 first volume is around bulkhead flange 26a, volume Two around bulkhead flange 26b, third winding bulkhead flange 26c on the outside of diameter direction Mode outstanding is formed at a predetermined interval along Z-direction.Utilize the winding being formed between these end bulkheads flanges 24 and 25 Bulkhead flange 26a~26c sequentially forms region S1~S4 between these bulkhead flanges below Z-direction.In addition, right In winding bulkhead flange 26a~26c and region S1~S4 number there is no particular limitation.

In present embodiment, in region S1, S4, shares coiling 38 and continuously wind 6 circles respectively, to constitute First Line Circle portion 301 and the second coil part 302；In region S2, S3, intermediate coiling 37 separately and continuously wound plural turns, thus in constituting Between coil part 303.In present embodiment, the first volume plays first coil portion 301 around bulkhead flange 26a and is wound in region S3 Intermediate coil portion 303 the effect that is separated along Z-direction of first layer.In addition, volume Two will be played around bulkhead flange 26b to wind In the first layer in the intermediate coil portion 303 of region S3 and the second layer in the intermediate coil portion 303 for being wound in region S2 along Z-direction The effect separated.In addition, third winding bulkhead flange 26c plays the second coil part 302 and is wound in the medium line of region S2 The effect that the second layer in circle portion 303 is separated along Z-direction.

As shown in Figure 3A, constitute region S1 that the shared coiling 38 of first coil portion 301 and the second coil part 302 winds, The peak width T1 along Z axis in S4 is set to, and can enter a width with sharing coiling 38 in the Z-axis direction.But area Field width degree T1 can also be set to, and can enter two width with above shared coiling 38 in the Z-axis direction.In addition, this reality It applies in mode, peak width T1 is preferred all identical, but can also be slightly different.

In addition, wide along the region of Z axis in region S2, S3 that the intermediate coiling 37 for constituting intermediate coil portion 303 is wound Degree T2 is set to, and can enter a width with intermediate coiling 37 in the Z-axis direction.But peak width T2 can also be set It is set to, can enter two width with above intermediate coiling 37 in the Z-axis direction.In addition, in present embodiment, favored area The peak width T2 along Z axis in S2, S3 is consistent with the line footpath of shared coiling 38 and different from peak width T1, but can also With identical as peak width T1.

In addition, height (relative to spool, the length of radial direction) H1 of bulkhead flange 24~26 is set to can enter One with the coiling 37 or 38 of above (1 layer or more) height, in present embodiment, be preferably set to can to wind 3~8 layers around The height of line.It is preferred that the height H1 of each bulkhead flange 24~26 is all identical, however, you can also not same.

In present embodiment, the winding method of the shared coiling 38 of region S1 and S4 is wound in for α winding, shown in Fig. 3 B Coil between interconnecting piece 380, to each region S1 and S4 shown in Fig. 3 A start to wind by sharing coiling 38, and to shown in Fig. 3 B Each leading part 38a, 38b draw.

In addition, the winding method for being wound in the intermediate coiling 37 of region S2 and S3 is also α winding in present embodiment, from Interconnecting piece 370 between coil shown in Fig. 6 B starts to wind by intermediate coiling 37 to each region S2 and S3 shown in Fig. 3 A, and to Each leading part 37a, 37b shown in Fig. 3 B are drawn.

Here, being illustrated to α winding.For example, α winds shared coiling 38 on skeleton 20 shown in Fig. 3 A and Fig. 3 B When, firstly, a part in the circumferencial direction of winding bulkhead flange 26 has the part (referring to Fig. 4) of notch, by share around Region S1 and region S4 shown in 380 connection figure 3A of interconnecting piece between the coil of line 38.Then, being total to close to the side of leading part 38a A part with coiling 38 is the inside of S4 in region, is wound in the way of such as right rotation in the periphery of winding canister portion 28 Multilayer (in present embodiment, 6 layers).Meanwhile another part of the shared coiling 38 close to the side of leading part 38b is, in region The inside of S1, according to the direction (or may be the same direction) opposite with the winding method in the S1 of region, in winding canister portion 28 Periphery multilayer-wound.In addition, sutomatic winding machine can be used also to carry out in these operations.

The intermediate coiling 37 that region S2, S3 are wound in shown in Fig. 3 A is, as shown in figure 4, in winding bulkhead flange 26 A part of circumferencial direction has the part of notch, between the coil of the shared coiling 38 of configuration after interconnecting piece 380, the first insulation of installation Cover 81.Then, a part close to the intermediate coiling 37 of the side of leading part 37a is the inside of S3 in region, according to such as dextrorotation Periphery multilayer-wound of the mode turned in winding canister portion 28.Meanwhile another portion of the intermediate coiling 37 close to the side of leading part 37b It point is the inside of S2 in region, according to the direction (or may be same direction) opposite with the winding method in the S3 of region, Wind the periphery multilayer-wound of canister portion 28.In addition, sutomatic winding machine can be used also to carry out in these operations.

As shown in figure 4, the both ends of the X-direction in the end bulkheads flange 25 for the lowest part for being located at Z-direction, difference one Body it is formed with exoskeleton leg 29.Each exoskeleton leg 29 is formed, from the both ends of the X-direction of end bulkheads flange 25 to Z The lower section of axis direction is prominent.Each pedestal 70 shown in Fig. 2 is accommodated in each exoskeleton leg 29.The height of the Z-direction of each pedestal 70 Degree is adjusted to, and when each pedestal 70 to be contained in each exoskeleton leg 29, the bottom surface of each pedestal 70 is from the bottom surface of core components 40b Expose the degree of preset distance.That is, pedestal 70 also has the function as height regulating mechanism.

As shown in figure 4,23 side of terminal base of winding bulkhead flange 26a, 26b, 26c, than the first insulation shown in Fig. 5 A The narrow width of the Y direction width of cover 81, is formed with notch 264a, 264b, 264c.In addition, winding bulkhead flange 26a's The downside surface of Z-direction is formed with the ream being not penetrated along Z-direction in the circumferential locations for being formed with notch 264a End face 261a.In addition, the uper side surface of the Z-direction in winding bulkhead flange 26c, in the circumference side for being formed with notch 264c To position, it is formed with the spot facing 261c being not penetrated along Z-direction.

Along spot facing 261a and 261c, the first insulating boot 81 shown in Fig. 5 A is installed on winding bulkhead flange 26a and 26c Between, to close notch 264a, 264c.As shown in Figure 5A, the first insulating boot 81 is used for interconnecting piece 380 between coil and centre Coil part 303 insulate.

As shown in Fig. 3 B and Fig. 5 A, the first insulating boot 81 include first part's flange 811, second part flange 812, in Between ribbed portion 813, upper section flange 814, middle section cylinder 815 (referring to Fig. 2), vertical component effect 816, the first lateral vertical section 817, the second lateral vertical section 818, separation convex shaped part 819.

As shown in Fig. 2, middle section cylinder 815 constitutes a part of cylinder.Winding constitutes medium line on middle section cylinder 815 Circumferencial direction a part of the intermediate coiling 37 in circle portion 303.As shown in Figure 3B, the inner peripheral surface of middle section cylinder 815 clamps coil Between interconnecting piece 380, and it is opposed with the outer peripheral surface of winding canister portion 28 of skeleton 20.In this way, with interconnecting piece 380 between coil and middle spaced winding The first insulating boot 81 is arranged in line 37 (intermediate coil portion 303) segregate mode, and thereby, it is possible to be reliably achieved the exhausted of the two Edge.

As shown in Fig. 2 and Fig. 5 A, the Z axis of first part's flange 811 and second part flange 812 in middle section cylinder 815 The one end and the other end in direction is formed parallel to X-Y plane respectively.As shown in Figure 5A, in the upper table of first part's flange 811 The both ends of the Y direction in face are formed with 811 α of spot facing.811 α of spot facing is formed: the width with scheduled Y direction, And extend preset distance along the x axis.Spot facing is formed at the both ends of the Y direction of the lower surface of second part flange 812 812α.812 α of spot facing is formed: the width with scheduled Y direction, and extends preset distance along the x axis.

Middle section flange 813 is flat with X-Y in a manner of being clamped by first part's flange 811 and second part flange 812 Face is formed in parallel at the substantially central portion of the Z-direction of middle section cylinder 815.In example illustrated, middle section flange 813 It is separated into Y direction side and the two parts of the Y direction other side.

Vertical component effect 816 is formed: having scheduled Y direction width, and from the upper surface edge of first part's flange 811 The mode that Z-direction extends, it is parallel with Y-Z plane.First lateral vertical section 817 is formed: having scheduled X-direction wide Degree, and the mode extended from one lateral edge Z-direction of the Y direction of the upper surface of first part's flange 811, it is parallel with X-Z plane. Second lateral vertical section 818 is formed: having scheduled X-direction width, and the Y from the upper surface of first part's flange 811 The mode that the axis direction other side extends along Z-direction, it is parallel with X-Z plane.Upper section flange 814 is formed: with it is vertical The mode in portion 816, the first lateral vertical section 817 and the respective Z-direction one end connection of the second lateral vertical section 818, it is flat with X-Y plane Row.

Separation convex shaped part 819 is formed: having scheduled Z-direction width, and in the Y direction of vertical component effect 816 Centre portion, the normal direction from the one side (face of the lead direction side of leading part 37a, 37b) of vertical component effect 816 along the face extend.Point From convex shaped part 819 from Z-direction one end of vertical component effect 816 across to the Z-direction other end.Separate convex shaped part 819 play will in Between coiling 37 the effect that is separated from each other of leading part 37a (rising portions 371a) and leading part 37b (rising portions 371b).

As shown in Fig. 5 A and Fig. 5 B, in the region clamped by middle section flange 813 and first part's flange 811, formed The the first access 820a for thering is intermediate coiling 37 (first layer corresponding to intermediate coil portion 303) to pass through.Equally, by middle section The region that flange 813 and second part flange 812 clamp, is formed with intermediate coiling 37 (second corresponding to intermediate coil portion 303 Layer) the first access 820a for passing through.

As shown in Fig. 3 B and Fig. 5 B, previous first access 820a is formed, by intermediate coiling 37 and by first The shared coiling 38 of the top (aftermentioned alternate path 820b) of flange 811 is divided to be isolated.In addition, the latter the first access 820a quilt Be formed as, intermediate coiling 37 is isolated with the shared coiling 38 of the lower section by second part flange 812.In this way, with middle spaced winding Line 37 (intermediate coil portion 303) and the segregate mode of shared coiling 38 (first coil portion 301 and the second coil part 302), if The first insulating boot 81 is set, thereby, it is possible to be reliably achieved the insulation of the two.

In addition, intermediate coiling 37 (first layer in intermediate coil portion 303) and shared coiling 38 (first coil portion 301) it Between configure first part's flange 811, and constitute the first access 820a, as a result, in the case where not making 10 enlargement of transformer, just It can substantially ensure the creepage distance between intermediate coiling 37 and shared coiling 38.

In addition, by intermediate coiling 37 (second layer in intermediate coil portion 303) and shared 38 (the second coil part of coiling 302) second part flange 812 is configured between, in the case where not making 10 enlargement of transformer, it will be able to substantially ensure middle spaced winding Creepage distance between line 37 and shared coiling 38.

As shown in Fig. 5 A and Fig. 5 B, in the region clamped by upper section flange 814 and first part's flange 811, formed The alternate path 820b for thering is shared coiling 38 to pass through.As shown in Fig. 3 B and Fig. 5 B, alternate path 820b is formed: will share around Line 38 and the intermediate coiling 37 by the top of upper section flange 814 leading part 37a, 37b (direction change portion 372a, 372b) it is isolated.In this way, segregate to share coiling 38 (first coil portion 301) and leading part 37a, 37b of intermediate coiling 37 The first insulating boot 81 is arranged in mode, and thereby, it is possible to be reliably achieved the insulation of the two.

In addition, in leading part 37a, 37b (direction change portion 372a, 372b) of intermediate coiling 37 and shared coiling 38 (the One coil part 301) between configure upper section flange 814, and constitute alternate path 820b, do not make transformer 10 big as a result, In the case where type, it will be able to substantially ensure the surface distance between leading part 37a, 37b and shared coiling 38 of intermediate coiling 37 From.

In the region surrounded by vertical component effect 816, the first lateral vertical section 817, separation convex shaped part 819, it is formed with intermediate coiling The third path 820c that 37 leading part 37a passes through.Equally, by vertical component effect 816, the second lateral vertical section 818, separation convex shaped part 819 regions surrounded, are formed with the third path 820c that the leading part 37b of intermediate coiling 37 passes through.Each third path 820c points The effect that leading part 37a, 37b of intermediate coiling 37 Fa Hui do not guided from Z-direction one end to the other end.

As shown in Fig. 3 B and Fig. 5 B, previous third path 820c is formed, by the leading part 37a of intermediate coiling 37 (rising portions 371a) is isolated with shared coiling 38.The latter third path 820c is formed, by the leading part of intermediate coiling 37 37b (rising portions 371b) is isolated with shared coiling 38.In this way, with leading part 37a, 37b of intermediate coiling 37 and shared coiling 38 The first insulating boot 81 is arranged in (first coil portion 301) segregate mode, and thereby, it is possible to be reliably achieved the insulation of the two.

In addition, in leading part 37a, 37b (rising portions 371a, 371b) and shared 38 (First Line of coiling of intermediate coiling 37 Circle portion 301) between configure vertical component effect816, and third path 820c is constituted, as a result, in the situation for not making the enlargement of transformer 10 Under, it can substantially ensure the creepage distance between leading part 37a, 37b and shared coiling 38 of intermediate coiling 37.

As shown in Figure 5 B, in present embodiment, the first insulating boot 81 is roughly divided into the first cover portion 81A and the second cover portion 81B, Each subordinate of the first above-mentioned insulating boot 81 is in any one of cover portion 81A, 81B.In addition, the first cover portion 81A corresponds to lead to The part of the upside of the line segment c of first part's flange 811 is crossed, the second cover portion 81B corresponds to the part of the downside of line segment c.

In present embodiment, a part (positioned at the part of the upside of line segment c) of first part's flange 811, upper section Flange 814, vertical component effect 816, the first lateral vertical section 817, the second lateral vertical section 818 and separation convex shaped part 819 belong to the first cover portion 81A partly belongs to the second cover portion 81B other than above-mentioned each portion.

In addition, the point-score of the first cover portion 81A and the second cover portion 81B are not limited to this, the point-score can also be suitably changed. For example, it can be: line segment c is set to middle section flange 813, the part of the upside positioned at line segment c is set as first The part of downside positioned at line segment c is set as the second cover portion 81B by cover portion 81A.

In present embodiment, the first cover portion 81A and the second cover portion 81B be by integraty formed, but each cover portion 81A, 81B can also be constituted by loading and unloading freely.That is, being also possible to: the first insulating boot 81 is physically separated (segmentation) at First cover portion 81A and the second cover portion 81B, by combining these each cover portion 81A, 81B integraty, to constitute the first insulating boot 81.By separately manufactured first cover portion 81A and the second cover portion 81B, forming is become easy.

As shown in figs. 4 and 5 a, about the first insulating boot 81,811 α of spot facing of first part's flange 811 is connected to The spot facing 261a of one winding wall part 26a, 812 α of spot facing of second part flange 812 are connected to third winding wall part The spot facing 261c of 26c, and the first insulating boot 81 is fixed on skeleton 20 in a manner of it can be slidably inserted into.As shown in Figure 6B, originally In embodiment, interconnecting piece 380 passes through the inside in intermediate coil portion 303 between coil, but as shown in Figure 3B, interconnecting piece between coil 380 realize insulation by middle section cylinder 815 in-between with intermediate coil portion 303.

As shown in Figure 3B, in 22 side of terminal base of winding bulkhead flange 26a, 26c, to install the second insulation shown in Fig. 2 The mode of cover 82 is formed with notch 264a, 264c.As shown in Figure 3B, shared coiling 38 is realized by the second insulating boot 82 The rising portions 381a of leading part 38a and the mutual insulation in intermediate coil portion 303, and realize intermediate coil portion 303 and First Line Circle portion 301 and the mutual insulation of the second coil part 302.

As shown in Figure 5 C, second insulating boot 82, which includes, is formed parallel at the both ends of its Z-direction with X-Y axial plane First part's flange 821 and second part flange 822, wall portion 823, a counter-lateral quadrents 824.As shown in Figure 3B, the second insulating boot 82 By by ribbed portion 821,822 be embedded in be formed in 22 side of terminal base winding bulkhead flange 26a, 26c notch 264a, 264c, and by ribbed portion 821,822 be formed in 22 side of terminal base winding bulkhead flange 26a, 26c spot facing 261a, 261c is abutted and is slidably inserted into, and is fixed on skeleton 20.

As shown in Fig. 3 B and Fig. 5 C, drawn in the leading part 38a (rising portions 381a) for sharing coiling 38 to the top of coil Midway out is arranged second between rising portions 381a and intermediate coil portion 303 in a manner of being isolated with intermediate coil portion 303 Insulating boot 82, thereby, it is possible to be reliably achieved the insulation of the two.

In addition, in a manner of first coil portion 301 and the second coil part 302 is isolated with intermediate coil portion 303, in First Line Second insulating boot 82 is set between circle portion 301 and the second coil part 302 and intermediate coil portion 303, and thereby, it is possible to be reliably achieved The insulation of the two.

These insulating boots 81,82 are constituted using the insulating element of the plastics identical or different with skeleton 20 etc..About Insulating boot 81,82 is dividually to shape with skeleton 20, and be installed in a part of circumferencial direction of skeleton 20.

The transformer 10 of present embodiment is, by assembling each component shown in Fig. 2, and the spaced winding into the winding of skeleton 20 Line 37 and shared coiling 38 and manufacture.Hereinafter, illustrating an example of the manufacturing method of transformer 10 using Fig. 2 etc..In transformer In 10 production, firstly, preparing skeleton 20.There is no particular limitation for the material of corresponding skeleton 20, by the insulating materials of resin etc. To form skeleton 20.

Then, shared coiling 38 is wound in the periphery of the winding canister portion 28 of skeleton 20 by α winding, forms first Coil part 301 and the second coil part 302.As formed first coil portion 301 and when the second coil part 302 it is used share around Line 38, there is no particular limitation, but it is preferable to use twisted wires (litz wire) etc..In addition, forming first coil portion 301 and the Terminal part the second leading part 38a, 38b of shared coiling 38 when two coil portion 302 are welded to connect in such as terminal 94.

Then, first insulating boot 81 is installed to the skeleton 20 for being wound with shared coiling 38.In addition it is also possible to be that will be total to It is wound in coiling 38 before the periphery of skeleton 20, the first insulating boot 81 is installed on skeleton 20.

Then, intermediate coiling 37 is wound in the periphery of the winding canister portion 28 of skeleton 20, forms intermediate coil portion 303.As Used intermediate coiling 37 when intermediate coil portion 303 is formed, can be identical as shared coiling 38, it can also be with shared coiling 38 It is different.In addition, terminal part, that is, first lead portion 37a, 37b of the intermediate coiling 37 when forming intermediate coil portion 303 is welded to connect In such as terminal 94.

Then, it is drawn out to above wireline reel from intermediate coil part 303 by first lead portion 37a, 37b, and is locked to locking Portion 222,222, and drawn to the direction far from coil 300.

In addition, installing the second insulating boot 82 to skeleton 20, draw from first coil portion 301 and the second coil part 302 by second Line portion 38a, 38b is locked to fastener 232,232 to extraction above wireline reel, and draws to the direction far from coil 300. Then, in the top of terminal base 22,23, installation is drawn around irdome 60.In addition it is also possible to be that shared coiling 38 is being wound in bone Before the periphery of frame 20, the second insulating boot 82 is installed on skeleton 20.

Then, insulation board 83,84 is installed on to the two sides of the X-direction of skeleton 20.Thereby, it is possible to realize the X of shell 90 The insulation of leading part 37a, 37b of axis direction side and intermediate coiling 37.In addition, the X-direction that can be realized shell 90 is another The insulation of leading part 38a, 38b of side and shared coiling 38.

Then, cover 50 is installed on to the two sides of the Y direction of skeleton 20, then, magnetic is installed from the up and down direction of Z-direction Core 40a, 40b.That is, keeping gap as needed between the front end of middle leg 46a, 46b of magnetic core 40a, 40b, and engage The front end of side leg 48a, 48b are each other.As the material of magnetic core 40a, 40b, the soft magnetic material of metal, ferrite etc. can be enumerated, But there is no particular limitation to it.

Then, pedestal 70 is contained in the inside of skeleton foot 29.In addition it is also possible to be installed in advance in skeleton foot 29 Pedestal 70.Then, bottom plate 92 is adhered to the bottom peristome of shell 90, and stores above-mentioned group in the open shell 90 in top Body is filled, and fills heat transmission resin to the inside of shell 90.By above-described process, present embodiment can be manufactured Transformer 10.

The transformer 10 of present embodiment is to clamp intermediate coil using first coil portion 301 and the second coil part 302 The structure (sandwich structure) in portion 303.Therefore, it can be improved the coupling between these coil parts, can be easily implemented leakage field The stabilisation of characteristic.In addition, even if also can be realized the change that can obtain the high coupling of stable Magnetic leakage characteristics under high frequency band Depressor 10.

In particular, intermediate coiling 37 carries out α winding to skeleton 20 in the transformer 10 of present embodiment.With regard to α winding Speech can also reduce the number of plies in spool direction even if increasing winding number, therefore, facilitate the slimming, small-sized of transformer 10 Change.In addition, the extraction of the coiling from winding central part disappears, and therefore, intermediate coiling 37 will not be overlapped by being set as α winding, Therefore, facilitate the slimming of transformer 10.

In addition, by being set as α winding, facilitating the stabilisation of Magnetic leakage characteristics in intermediate coil portion 303.In addition, also can The winding number of coil is easily set as identical between the first layer and the second layer in intermediate coil portion 37, in addition, can also hold It changes places and changes winding number.

In addition, first coil portion 301 and the second coil part 302 utilize shared coiling 38 to be continuously formed.By setting For this structure, electric current can be prevented to be biased to either first coil portion 301 and the second coil part 302 and flowed.Due to It can prevent the skewed popularity of electric current from flowing, therefore, the abnormal heating of the coil part 301 or 302 of either one can be prevented.In addition, Compared with the case where constituting first coil portion 301 and the second coil part 302 using different coilings, composition first can be shortened The winding length of the shared coiling 38 of coil part 301 and the second coil part 302, and copper loss can be reduced.If copper can be reduced Damage, then can be improved efficiency, additionally it is possible to reduce fever.

In addition, the coefficient of coup of primary coil and secondary coil is higher in present embodiment, therefore, even if in primary line In the case where the differing greatly of the winding number of the winding number and secondary coil of circle, the stabilization of Magnetic leakage characteristics also can be easily implemented Change.That is, according to the present embodiment, even if the winding number of the shared coiling 38 in first coil portion 301 and the second coil part 302 In the biggish situation of winding percentage of the winding number of the intermediate coiling 37 in intermediate coil portion 303, effect is also big.It is specific and Speech is 2 or more, 3 in the winding percentage n1/n2 of the winding number n2 of the total winding number n1 and intermediate coiling 37 that share coiling 38 Above, in the case where 5 or more, more significant effect can be obtained.

In addition, sharing coiling 38 in present embodiment and carrying out α winding on skeleton 20.It, can by being set as this structure The first coil portion 301 and the second coil of separate configuration in winding axis direction are readily formed at using single shared coiling 38 Portion 302.In addition, also the winding number of coil easily can be set as phase in first coil portion 301 and the second coil part 302 Together, in addition, can also easily vary winding number.

In addition, as shown in Figure 3A, in first coil portion 301 and the second coil part 302, only to be deposited along winding axis direction In the mode of single coiling 38, the interval T1 and T2 of the flange part 24~26 (26a~26c) of skeleton 20 are adjusted, thereby, it is possible to hold Change places prevent each layer coiling 37 and 38 winding number unevenness, facilitate the stabilisation of Magnetic leakage characteristics.That is, can be easy tight Control to lattice the coefficient of coup of primary coil and secondary coil.

In addition, even if increasing winding number, can also reduce the number of plies in spool direction for α winding, therefore, facilitate Slimming, the miniaturization of transformer 10.In addition, the extraction of the coiling from winding central part disappears by being set as α winding, because This, coiling will not be overlapped, and therefore, facilitate the slimming of transformer 10.

In addition, being formed with the first access 820a in present embodiment in the first cover portion 81A, being formed in the second cover portion 81B Alternate path 820b and third path 820c.Therefore, intermediate coiling 37 shares coiling 38 and passes through second by the first access 820a Access 820b, leading part 37a, 37b of intermediate coiling 37 pass through third path 820c.In this way, intermediate coiling 37, shared coiling 38, leading part 37a, 37b of intermediate coiling 37 pass through different accesses respectively, and each access be it is segregate, therefore, can The insulation being reliably achieved between each.

In addition, various changes can be carried out within the scope of the invention the present invention is not limited to above-mentioned embodiment.

For example, as the other way in the periphery of skeleton 20 installation coil 300, it is also contemplated that such as under type: firstly, Intermediate coiling 37 is wound in skeleton 20, constitutes intermediate coil portion 303；Then, shared coiling 38 is wound in skeleton 20, constituted First coil portion 301 and the second coil part 302.In the case where coil 300 is installed on skeleton 20 in this way, between coil Interconnecting piece 380 passes through the outside in intermediate coil portion 303.

In addition, above-mentioned primary coil be also possible to the relationship of secondary coil it is opposite.That is, being also possible to: share around Line 38 constitutes secondary coil, and intermediate coiling 37 constitutes primary coil.In addition, in this case, the size of the outer diameter of each coiling is closed System can also be opposite with above-mentioned example.Alternatively, the outer diameter of these coilings can also be identical.

Claims (8)

1. a kind of coil device, which is characterized in that

It includes

First coil portion；

Second coil part is constituted using shared coiling identical with the coiling for constituting the first coil portion, and along winding Axis is dividually configured with the first coil portion；

Intermediate coil portion along the wireline reel between the first coil portion and the second coil part, and utilizes and institute The different intermediate coiling of shared coiling is stated to constitute,

The intermediate coiling α is wound in skeleton.

2. coil device according to claim 1, which is characterized in that

The shared coiling α is wound in the skeleton.

3. coil device according to claim 1 or 2, which is characterized in that

The shared coiling, which has, to be extended between the first coil portion and second coil part along the winding axis direction Coil between interconnecting piece,

The coil device also has the first insulating boot for interconnecting piece between the coil and the intermediate coil portion to insulate.

4. coil device according to claim 3, which is characterized in that

First insulating boot has the first cover portion and the second cover portion,

In first cover portion, in such a way that the intermediate coiling to be isolated with the shared coiling, it is formed with the middle spaced winding The first access that line passes through,

It is formed in a manner of by the isolation of the leading part of the shared coiling and the intermediate coiling in second cover portion State the alternate path that shared coiling passes through；Also,

In second cover portion, in such a way that the leading part of the intermediate coiling to be isolated with the shared coiling, formed The leading part for stating intermediate coiling passes through third path.

5. coil device according to claim 4, which is characterized in that

First cover portion and second cover portion are constituted by loading and unloading freely.

6. coil device according to claim 3, which is characterized in that

Interconnecting piece passes through the inside in the intermediate coil portion between the coil.

7. coil device according to claim 1 or 2, which is characterized in that

The leading part of the shared coiling has the rising portions extended along the winding axis direction,

The coil device also has the second insulating boot for the rising portions and the intermediate coil portion to insulate.

8. coil device according to claim 1 or 2, which is characterized in that

Either in the shared coiling composition primary coil or secondary coil, the intermediate coiling constitutes primary coil or secondary Any another party in grade coil.