CN106463244B - It include the electrical inductor assembly at least one induction coil of metal inductance device shell thermal coupling - Google Patents

It include the electrical inductor assembly at least one induction coil of metal inductance device shell thermal coupling Download PDF

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Publication number
CN106463244B
CN106463244B CN201580024414.0A CN201580024414A CN106463244B CN 106463244 B CN106463244 B CN 106463244B CN 201580024414 A CN201580024414 A CN 201580024414A CN 106463244 B CN106463244 B CN 106463244B
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China
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electrical
inductor
coil
device shell
inductance device
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CN201580024414.0A
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CN106463244A (en
Inventor
马雷克·里尔科
马瑞斯·瓦尔恰克
米洛什·汉德泽尔
马瑞斯·格瓦德拉
雅各布·哈驰洛夫斯基
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SMA Solar Technology AG
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SMA Solar Technology AG
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/30Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306Fastening or mounting coils or windings on core, casing or other support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/32Insulating of coils, windings, or parts thereof
    • H01F27/324Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00Fixed inductances not covered by group H01F17/00
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2847Sheets; Strips
    • H01F2027/2857Coil formed from wound foil conductor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)

Abstract

A kind of electrical inductor assembly (1), including at least one induction coil (3), the Embedding Material at least partially around the metal inductance device shell (2) of induction coil (3) and with induction coil (3) and metal inductance device shell (2) contacting and be thermally coupled to induction coil (3) metal inductance device shell (2).Induction coil (3) includes inductor winding (4) made of the spool (20) being formed of an electrically insulating material and the electric conductor (25) being wound on spool (20).Inductor winding (4) also has excircle and two end faces (27), and the excircle of electrical insulator (5) covering inductor winding (4).The coil cap (11) being formed of an electrically insulating material covers the adjacent domain of the electrical insulator (5) of the end face (27) of inductor winding (4) and the excircle of covering inductor winding (4) at least partly so that any point of the end face (27) of inductor winding (4) is along at least required minimum creep distance (28) of the distance without any approach of coil cap (11) or the electrically insulating material of spool (20) to metal shell (2).

Description

It include the inductor at least one induction coil of metal inductance device shell thermal coupling Component
Technical field
The present invention relates to electrical inductor assemblies comprising at least one induction coil, at least partially around induction coil Metal inductance device shell and Embedding Material, Embedding Material were not only contacted with induction coil and inductor shell, but also by induction coil It is thermally coupled to inductor shell.In particular it relates to following electrical inductor assembly, wherein at least one induction coil packet The inductor winding made of electric conductor for including the spool being formed of an electrically insulating material and being wrapped on spool, wherein inductor Winding has excircle and two end faces, and wherein electrical insulator covers the excircle of inductor winding.
Background technology
The electrical insulator for covering the excircle of inductor winding can be individual electrical insulator, for example, surrounding inductor The electrical isolation foil of the excircle winding of winding.However, if this electrical insulator of electric conductor has enough intensity, cover The electrical insulator of the excircle of inductor winding can also be provided by being wrapped in spool together with the electrical insulator on electric conductor.It is logical Often, the electric conductor being wrapped on the spool of induction coil is provided with the thin layer of insullac.This insullac will only enough For providing inductor winding toward each other rather than towards enough electrical isolations of metal inductance device shell.Therefore, covering electricity The individual electrical insulator of the excircle of sensor winding is required.
The metal shell of electrical inductor assembly is can-like to receive Embedding Material.In the open side of can-like metal shell, electricity Being terminated or it can be at least partially around induction coil Embedding Material in metal shell may be used in sensor component Metal enclosed by metal enclosed plate or any other type is closed.
For example, in the electrical inductor assembly defined at the beginning AC choke coils or DC choke coils can be used for example as, as AC filters Wave device or DC filters or as electric energy store inductor.In any application in such applications, it is necessary to inductor Winding is electrically insulated with metal inductance device shell.In general, also it is necessary to inductor winding and arranging at least one sense on it The magnetic core of the electrical inductor assembly of the spool of coil is answered to be electrically insulated.On the other hand, inductor shell is respectively necessary for induction coil Good thermal coupling and magnetic core, so that the heat generated in induction coil and magnetic core the two by flowing through the electric current of induction coil Amount dissipates.Therefore, there is different requirement to Embedding Material, do not provided generally well because providing the Embedding Material being well electrically insulated Thermal coupling.In addition, including electric insulation resin matrix (for example, polyurethane, epoxy resin or silicones) and heat conduction particle The Embedding Material of the filter of (for example, ceramic particle, quartz particles, AIN or BN particles) requires usually to show to meet two Show the big viscosity due to filter and in their fluid state.Therefore, Embedding Material is not suitable for being filled in induction coil Small―gap suture between metal shell is without forming gap.However, the gap in Embedding Material reduces induction coil to gold Belong to the thermal coupling of shell, and the failure of the electrical insulator between inductor winding and metal shell can be triggered.In addition, The failure of electrical insulator between inductor winding and metal shell can also be by the dress of the heat conduction particle on the inside of resinous substrates Fill out object triggering.The case where this is typically at the relatively small region of average distance wherein between heat conduction particle.In metal shell In the common total volume of Embedding Material inside, the distribution of heat conduction particle is not ideally uniform.In addition, total volume Since (for example, between inductor winding and metal shell) possible generate is coagulated especially at small―gap suture during potting process Polymers and change.In these condensation products, the average distance between heat conduction particle is relatively small, and therefore triggers the wind of electric fault Danger is relatively high.Therefore, heat-conducting filler usually endangers the electrical isolation capabilities of Embedding Material.In addition, because in induction coil and gold Belong to the small distance between shell, it is necessary to induction coil is accurately located in metal shell so that in induction coil and will All gaps filled between the metal shell of Embedding Material have unified width.
2013/0265129 A1 of US disclose a kind of electromagnetic equipment including transformer device.Transformer device has core Body, winding and the shell being arranged around at least part in core and winding.Shell is at least partially around transformer Component.Transformer device is installed on the first part of shell so that heat is passed to first of shell from transformer device Point.The second part of shell has from the extension wherein extended so that and extension is placed with to be thermally contacted with transformer device, Heat is transferred to extension from transformer device.
102011076227 A1 of DE disclose a kind of inductance component, such as choke coil, are used to make electricity in electric conductor It flattens and slides.Inductance component has induction coil comprising at least one inductor winding of wire conductor.Induction coil by comprising In the housing.Heat conductive pad is arranged between induction coil and shell.Pad can be heat pad, or pad can be by phase-change material, class The material or gap filling material of gel consistency are made.
2005/052964 A1 of WO disclose a kind of heat conducting bridge for cyclic annular core inductive resistor.Cyclic annular core It is surrounded by least one winding.Heat conducting bridge extends into the element in the center of cyclic annular core by base component and from base component It is formed so that cyclic annular core is placed around this element.Base component encloses tank-like shell, in tank-like shell, endless core Body is surrounded by Embedding Material.
3522740 A1 of DE disclose another transformer or choke coil comprising cyclic annular core.Here, heat transfer Element extends into the center of cyclic annular core from metal shell, in metal shell, the winding on cyclic annular core and cyclic annular core It is surrounded by bulk material (for example, quartz sand).Metal shell includes cooling ribs, is used to make the heat from winding and cyclic annular core Amount dissipates.
19814897 A1 of DE disclose a kind of for powerful inductance component, wherein the cyclic annular core with winding It is disposed in tank-like shell, and embedded Embedding Material.Heat pipe extends into the center of cyclic annular core from shell.
From 9406996 U1 of DE it is known another kind inductance component comprising cyclic annular core and in metal shell by The winding that Embedding Material surrounds.Here, the element for the shell for extending into the center of cyclic annular core includes cyclic rib, which increase This heat transfer element is towards the surface of Embedding Material made of resin.
4,000,483 A of US disclose a kind of transformer comprising magnetic core, the primary coil of stacking are wound thereon Electrically insulating plastic material spool, secondary coil wind electrically insulating plastic material spool and two electrical isolations modelings to engage each other thereon Material capping, surround primary coil and between primary coil and stacked core and primary coil and secondary coil it Between other electrical isolation is provided.Plastic components be formed between primary coil and secondary coil and in primary coil and The electrical insulator of 2mm is provided between stacked core.Plastic components is arranged between primary coil and secondary coil and is provided to Lack the creepage distance of 10mm, and the creepage distance of at least 8mm is provided between primary coil and stacked core.The insulation of offer Body should allow stacked core being directly installed on the metal framework of utensil.
2008/0079525 A1 of US disclose a kind of coaxial filament transformer for vacuum equipment.Filament transformer packet Include core, armature winding and the magnetic core winding wound around core.Secondary windings is biased at high voltage, and armature winding It is placed as with secondary windings in a row.Armature winding and secondary windings are tied in individual spool or in common spool It closes.Creepage distance between armature winding and secondary windings is by combining between armature winding and the Bobbin portion of secondary windings Distance provides.Further, shielding is provided in the primary part of spool, for shielding armature winding and secondary windings.This screen Cover can be thin conducting wire shield winding form.The excircle of the secondary windings combined in secondary Bobbin portion is by insulator packet It encloses.Towards magnetic core, insulator can bend to the heat insulating lamella or calotte system of " C " shape made of electrical isolation polymeric material At.This thin slice or calotte are anchored at the idle Bobbin portion on the secondary Bobbin portion both sides in conjunction with secondary windings In.
There is still a need for a kind of electrical inductor assembly, wherein induction coil be effectively thermally coupled to inductor shell but with its electricity absolutely Edge, and still production cost is low.
Summary of the invention
The present invention provides electrical inductor assemblies.Electrical inductor assembly according to the present invention is defined in the dependent claims Preferred embodiment.
Electrical inductor assembly according to the present invention includes at least one induction coil, the gold at least partially around induction coil Belong to inductor shell and Embedding Material, Embedding Material had not only contacted with induction coil and inductor shell but also by induction coil thermal coupling It is bonded to inductor shell.Induction coil includes the spool being formed of an electrically insulating material and the electric conductor by being wrapped on spool Manufactured inductor winding.Inductor winding has excircle and two end faces.Electrical insulator covers the outer circle of inductor winding Week.The coil cap being equally formed of an electrically insulating material cover at least partly inductor winding end face and covering inductor around The adjacent domain of the electrical insulator of the excircle of group so that any point of the end face of inductor winding along without coil cap or At least required minimum creep distance of distance of any approach of the electrically insulating material of spool to metal shell.Wherein, described Spool is disposed on magnetic core, and any point of the end face of the inductor winding is along without the coil cap or the spool Electrically insulating material any approach to the magnetic core at least described required minimum creep distance of another distance.
The present invention is based on find relative to the most critical of the electrical insulator between induction coil and metal inductance device shell Point is those of end face of inductor winding of induction coil and the immediate point of metal inductance device shell.Even if these end faces are same The flange that sample is wound spool thereon by inductor winding covers, and if inductor winding is exhausted by electricity at its excircle Edge body covers, then by the point for the end face for having inductor winding very close to metal inductance device shell.It is unrelated with Embedding Material, The present invention ensures that the electrical insulator between induction coil and metal inductance device shell is put not at these by providing coil cap It can puncture.Coil cap by covering the end face of inductor winding and covering the excircle of inductor winding at least partly Electrical insulator adjacent domain ensure between the end face of inductor winding and metal inductance device shell keep necessary to most Small creepage distance.Here, being only without coil cap or spool from inductor winding to the relational approach of metal inductance device shell Those of electrically insulating material approach, it is assumed that the electrically insulating material of coil cap and spool has enough dielectric strengths.Therefore, in root In electrical inductor assembly according to the present invention, design (the especially electricity of coil cap and the excircle for covering inductor winding of coil cap The overlapping of the adjacent domain of insulator) creepage distance of the influence between induction coil and metal inductance device shell.This is in turn In the case where not dramatically increasing installation space necessary to electrical inductor assembly creepage distance is generated via the change of coil cap design Orientation modification option.This will be explained in greater detail in following figure.
If under any circumstance in electrical inductor assembly according to the present invention there are any this path by air, Then keep required minimum creep distance (that is, along the insulation between the end face of inductor winding and metal inductance device shell The minimum range in body surface face) it will ensure that and also keep minimum clearance distance between the end face of inductor winding and metal inductance device (that is, via the distance in any path by air).
The present invention is not relying on any dielectric strength of Embedding Material.On the contrary, by keeping the end for inductor winding The minimum creep distance of all the points in face, Embedding Material only provide other electrical insulator.Further, coil cap is relied on to keep Minimum creep distance means that inductor winding itself can be disposed in away from the very small distance of metal inductance device shell.Knot Fruit is that the small distance between inductor winding and metal inductance device shell provides excellent thermal coupling between these components It closes.The present invention does not equally rely on the thermal conductivity of Embedding Material (at least not significantly).This is because in fact electricity of the invention Sensor component via and be not directed through Embedding Material but by the road at the following heat conduction reinforced interface that will be explained in further detail Radial metal inductance device shell provides significant heat and transmits.Therefore, Embedding Material not necessarily needs the filler of heat conduction particle In order to provide enough thermal conductivity of Embedding Material.In Embedding Material not the filler of heat conduction particle in the case of, also disappear In addition to the risk of the dielectric breakdown triggered by the filler.In addition, Embedding Material is the case where it needs not be provided enough thermal conductivity It is lower usually more cheap.
In addition, in several aspects, coil cap can help to produce the electrical inductor assembly of the present invention.It is one of in terms of these Induction coil is arranged relative to metal inductance device shell.On the other hand it is relative to other induction coils and/or electrical inductor assembly Magnetic core arrange induction coil.
In electrical inductor assembly according to the present invention, Embedding Material for example can for the low viscosity in its fluid state into Row optimization so that or even the small―gap suture between induction coil and metal inductance device shell is also securely filled.Due to these The width of gap is small, therefore the thermal conductivity of Embedding Material and important not as good as in the case of compared with broad gap.Certainly, it is contemplated that fill The cost of closure material and the step of Embedding Material is filled into metal inductance device shell, for induction coil to metal inductance device The optimal thermal coupling of shell, people can be with the thermal conductivity of Optimization gap width and Embedding Material.
In addition to the required minimum between all the points of the end face for the inductor winding for retaining towards metal inductance device shell Except creepage distance, this required minimum that can also retain towards the magnetic core that the spool of induction coil is disposed thereon climbs electricity Distance.
The value of required minimum creep distance will depend on the practical application of electrical inductor assembly and several parameters, e.g., For example, potential difference between all parts, within the Embedding Material or impurity at surface in Embedding Material and/ Or existing environmental condition will usually consider during the operation of all parts.For it is well known by persons skilled in the art be required Minimum creep distance suitable value.For example, necessary between the wall of on-insulated charging member and metal shell most The absolute value of small creepage distance depends on the peak value of the potential difference between component and metal shell, can be 1.6mm, 6.4mm Or 12.7mm.
In electrical inductor assembly according to the present invention, coil cap can essentially contacting metal inductor shell.With this Mode, for example, they can be used for before being filled into Embedding Material being aligned induction coil in metal inductance device shell.
In electrical inductor assembly according to the present invention, inductance can be completely covered in coil cap (or coil cap is together with spool) The end face of device winding, to keep entire end face completely insulated by the electrically insulating material of coil cap and spool.It is clear that coil Lid and spool must be overlapped to provide required minimum creep distance between end face and all the points of the outside of this capping. In such an embodiment, the electrical contact between the electric conductor and external electrical or electronic unit of inductor winding can be in coil Route is selected between the electrical insulator of the excircle of lid and covering inductor winding.
In another embodiment of the present invention, inductor winding is completely covered together with spool in coil cap or coil cap End face only other than the electrical contact window to the channel of inductor winding is provided.This electrical contact window specifically can be used for The electric conductor of inductor winding is connected to external electrical or electricity in the utensil for having used electrical inductor assembly according to the present invention Subassembly.It is clear that, if it is desired, be in electrical contact any point of window along the electrically insulating material without coil cap or spool Any path to the distance of metal shell and magnetic core (if provided) also at least required minimum creep distance.
For example, this creepage distance of electrical contact window can be provided that, it is to be in electrical contact window (especially towards magnetic core ) framed at least partly by the continuous rib for extending through the opening of neighbouring coil cap.Alternately or additionally, Ke Yiyou The rib masking electrical contact window of neighbouring coil cap, covers electrical contact window especially towards metal shell.
In electrical inductor assembly according to the present invention, coil cap cover electrical insulator the excircle to inductor winding into The region of row covering, it is adjacent with the end face of inductor winding.However, this is not meant to that an inductor is completely covered in coil cap The entire electrical insulator that the excircle of winding covers.On the contrary, coil cap does not cover being not close to for electrical insulator particularly End face but close to the region of metal inductance device shell.Therefore, these uncovered areas of electrical insulator are not by coil cap Electrically insulating material is pyrolyzed coupling with metal inductance device shell, but particularly good can be thermally coupled to metal inductance device shell and be used for Heat is quickly transferred to metal inductance device shell from inductor winding.Specifically, thermal coupling can be via electrical insulator not Overlay area and the heat conduction reinforced element that is thermally coupled to metal inductance device shell simultaneously are in direct contact to realize.
In one embodiment of electrical inductor assembly according to the present invention, the electrical insulator of the excircle of inductor winding by The continuous insulation foil for surrounding the excircle of inductor winding provides.Electric conductor winding can be conductor foil, and conductor foil can be with Spool is wrapped in such a way that the foil that insulate extends beyond conductor foil on axial (that is, in two endfaces of inductor winding) to connect With insulating on foil, to prevent the short circuit of the adjacent layer of inductor winding.However, continuous insulation foil can also surround the conductance by painting Inductor winding made of body (for example, conducting wire of japanning).In the application of lower temperature, insulation foil can be polyvinyl chloride, The thermotape of polyethylene or rubber.In the application of higher temperature, insulation foil can be insulating paper.The thickness of suitable insulation foil Degree usually will be in 25 μm to 100 μm of range.
It is transmitted to enhance from the heat of excircle to the metal inductance device shell of inductor winding, it can be in covering inductor The region (rather than by coil cap covering) of the electrical insulator of the excircle of winding is provided between metal inductance device shell A few heat conduction reinforced interface.This heat conduction reinforced interface can for example include the metal wound around the circumference of inductor winding Abdominal belt.Alternately or additionally, heat conduction reinforced interface can be " C " shape, only cover inductor winding excircle with That opposite three sides of the inner surface of can-like metal inductance device shell.As the replacement to metal abdominal belt, can also use by Abdominal belt made of another material with excellent thermal conductivity.
When the spool of induction coil is disposed on magnetic core, additionally or alternatively, in the region of magnetic core and metal At least one heat conduction reinforced interface can be provided between inductor shell.During the operation of electrical inductor assembly, if in metal Without generating potential difference, similar such case, for example, the metal inductance device shell with PE ground connection between inductor shell and magnetic core Body and PE ground connection magnetic core, then at least one heat conduction reinforced interface can be advantageously hardware, be in direct contact magnetic core and Metal inductance device shell, and therefore electric conductivity is provided between magnetic core and metal inductance device shell.On the other hand, in inductor During the operation of component, if generating potential difference between metal inductance device shell and magnetic core, excellent thermal coupling is ensured Enough electrical insulator of the mediate contact advantageously between two components is combined.This mediate contact is prevented in metal inductance device Electrical connection between shell and magnetic core, and can be by thin dielectric layer (for example, the outer surface of covering magnetic core and/or metal inductance The paint or thin insulating foil of device shell) it provides.It can also use between two components filled advantageously with Embedding Material Small―gap suture.When the spool of two induction coils is disposed coaxially on magnetic core, at least one heat conduction reinforced interface extends to In axial gap between the opposite end face of the inductor winding of two induction coils.
On when the spool of two induction coils is arranged in the parallel pin (that is, side by side) of magnetic core, in two inductions of covering It can (alternately or additionally) be provided between the opposite region of the electrical insulator of the excircle of the inductor winding of coil Heat conduction reinforced interface.This heat conduction reinforced interface is typically plate.
In electrical inductor assembly according to the present invention, any heat conduction reinforced interface can be metal shell protruding portion or Individual element of the extension either in metal inductance device shell.Nevertheless, this individual element can be attached, It installs and is either bound to metal inductance device shell or its and can be attached, install or be bound to induction coil or be placed on Metal inductance device shell is together with any part in induction coil.For example, heat conduction reinforced interface can be C-shaped element, it is clipped in On the electrical insulator for covering the excircle of the inductor winding of induction coil.The material of individual element can be any high heat conduction Property material, (for example, aluminium nitride, aluminium oxide and diamond), electric conductor etc. are (for example, aluminium, copper, brass, graphite including insulator etc. Deng) or in other magnetic parameter be ideally even iron.
In the electrical inductor assembly of the present invention, two end faces of the inductor winding of each induction coil are individual by two Coil cap covers.However, the two coil caps can also cover the second induction being arranged side by side at least one induction coil The end face of coil.On the other hand, the opposite end face of the neighbouring inductor winding of two coaxially arranged induction coils will By two individual coil cap coverings.However, individually coil cap may be configured in a predefined manner mutually each other Engagement, this pre-defined mode for example make two coaxially arranged induction coil alignment and/or make coaxial at two Pre-defined distance is kept between the induction coil of arrangement.They are also configured to keep the one of the magnetic core of electrical inductor assembly Part or pin.
In the electrical inductor assembly of the present invention, two of two induction coils that at least one coil cap covering is arranged side by side The end face of adjacent inductors winding, and/or individually coil cap is provided for two neighbouring inductance of two induction coils Each end face in two opposite end faces of device winding.The coil cap is configured to attached from the axial direction of the induction coil It is connected to the induction coil.
The useful improvement of the present invention is caused by claims, the description and the appended drawings.In the spy of specification being initially mentioned The benefit of the combination of sign and multiple features is used only as example, and can optionally or cumulatively use, without root According to the embodiment of the present invention for obtaining these benefits.In the feelings for not changing protection domain defined by the appended claims Under condition, it is applicable in below in relation to the disclosure of original application and patent:Further feature can learn from attached drawing, especially It the design and size that are shown relative to each other from multiple components and learns in being connected from the positioned opposite of them and they effective. The feature of different embodiments of the invention or independently of claim the different claims for having selected reference feature group It is also possible to close, and has motivation herein.This also relates to the feature shown in a separate drawing, or is describing them When the feature mentioned.These features can equally be combined with the feature of different claims.In addition, the other embodiment of the present invention Without mention in the claims be characterized in it is possible.
Be understood to cover with the quantity for the feature mentioned in specification in detail in the claims this accurate quantity and Than the quantity for the quantity bigger mentioned, without clearly using adverbial word " at least ".Such as, if it is mentioned that induction coil will then be managed Solution is in this way:Either there are two induction coils or more induction coils in the presence of just what a induction coil.It can be Other feature is added to these features or these features can be only the feature of each product.
The reference marker for including in detail in the claims is not intended to limit the range for the theme protected by claims.They Unique function is that claims is made to be easier to understand.
Description of the drawings
Below, it is explained further with reference to the preferred illustrative embodiment being shown in the accompanying drawings and describes the present invention.
Fig. 1 be it is according to the present invention in the metal inductance device shell that Embedding Material is filled into electrical inductor assembly before The vertical view of the first embodiment of electrical inductor assembly.
Fig. 2 individually describes the can-like metal inductance device shell of the electrical inductor assembly according to Fig. 1.
Fig. 3 be from the electrical inductor assembly depicted individually below in Fig. 1 other than metal inductance device shell according to fig. 2 All components stereogram.
Fig. 4 is according to the present invention in the metal inductance device shell that Embedding Material is filled into electrical inductor assembly and to adopt The vertical view of another embodiment of the electrical inductor assembly before closing its metal inductance device shell with metal enclosed plate.
Fig. 5 individually describes a pair in the induction coil according to the electrical inductor assembly of Fig. 4 surrounded by the chain-dotted line in Fig. 4 Induction coil.
Fig. 6 is the decomposition view according to a pair of of induction coil of Fig. 5.
Fig. 7 individually describes the can-like metal inductance device shell of the electrical inductor assembly according to Fig. 4.
Fig. 8 is individually to depict the electrical inductor assembly that is shown in Fig. 4 in addition to the metal inductance device housing section that shows in the figure 7 The stereogram of/outer all components.
Fig. 9 is the electricity according to the present invention before Embedding Material to be filled into the metal inductance device shell of electrical inductor assembly The perspective top view of another embodiment of sensor component.
Figure 10 is the longitudinal component of the induction coil by electrical inductor assembly according to the present invention in the first embodiment.
Figure 11 is the longitudinal component of the induction coil by electrical inductor assembly according to the present invention in a second embodiment; And
Figure 12 is the partial bus part by the induction coil of the embodiment of electrical inductor assembly according to the present invention, wherein Indicate the position of the position of metal inductance device shell and the magnetic core of electrical inductor assembly.
Specific implementation mode
In the vertical view of Fig. 1, it is shown that Embedding Material is being filled into the metal inductance device for surrounding multiple induction coils 3 Electrical inductor assembly 1 before shell 2.Here, depicting six induction coils 3.Each induction coil 3 includes by by continuous Insulate the inductor winding 4 that electrical insulator 5 covers made of foil.The electric conductor of each inductor winding 4 is wrapped in spool (no In the view of Fig. 1) on.The spool of all six induction coils 3 is arranged on common magnetic core 6, and common magnetic core 6 is by longitudinal direction Part and vertical component 7 form, and partly extend in one in spool longitudinally in each.Longitudinal component is arranged to parallel more It is right.These by vertical component 7 to being detached, and in addition vertical component 7 is arranged at the both ends of magnetic core 6.The part of magnetic core 6 is by prolonging Extending through two that end member 10 and nut 9 are screwed in thereon has a lag screw 8 to keep together.In electrical inductor assembly 1 Common magnetic core 6 on induction coil 3 it is basic arrangement can be identical as disclosed in 2013/170906 A1 of WO.
The end of the inductor winding 4 for each pair of induction coil 3 being arranged side by side on parallel a pair of of longitudinal component of magnetic core A pair of of coil cap 11 that face is formed of an electrically insulating material covers, which can be with the electrically insulating material of the spool of induction coil 3 It is identical.Coil cap 11 also covers the region for the excircle of inductor winding 4 covered by electrical insulator 5.Therefore, coil cap 11 is true The all the points for protecting the end face of inductor winding 4 keep required minimum creep distance and the minimum to metal inductance device shell 2 Clearance distance.Coil cap 11 is also ensured that relative to magnetic core 6 together with the spool of carrying inductor winding 4 (especially with respect to magnetic core 6 Vertical component 7) keep required minimum creep distance and minimum clearance distance.
However, coil cap 11 does not cover the main portion of the excircle of electrical insulator 5 and therefore inductor winding 4 Point.On the contrary, heat conduction reinforced interface 12 will keep this main portion of the excircle for the inductor winding 4 not covered by coil cap 11 Divide and is thermally coupled in metal inductance device shell 2.Additional heat conduction reinforced interface 13 every a pair coaxially arranged induction coil 3 it Between extend, magnetic core 6 is thermally coupled in metal inductance device shell 2.In addition heat conduction reinforced interface 14 is each pair of what is be arranged side by side Extend between the opposite excircle of the inductor winding 4 of induction coil 3, and by the neighbouring of the excircle of inductor winding 4 Region is thermally coupled in the bottom of metal inductance device shell 2.Lag screw 8 extends through and fixes these heat conduction reinforced interfaces 14.Coil cap 11 includes that core keeps extension 15, core to keep extension 15 partly to surround and therefore keep hanging down for magnetic core 6 Straight part 7.Cover the opposite coil cap 11 of the end face of axial adjacent induction coil 3 core keep extension 15 with Their modes overlapped in the axial direction configure.By keeping designing specified shape cooperation on extension 15 in core Element, it is also possible to ensure the pre-defined distance between induction coil 3 adjacent in the axial direction.
Not yet terminated according to the electrical inductor assembly 1 of Fig. 1.The filling encirclement induction in metal inductance device shell 2 will be passed through The Embedding Material of coil 3 and induction coil 3 is thermally coupled in metal inductance device shell 2 to terminate.Further, in Fig. 1 Do not describe the electrical contact with inductor winding 4, embedding is just extended through after Embedding Material is filled into inductor shell 2 Material.Specifically, until the contact wire of inductor winding 4 can be from the inductor between winding lid 11 and electrical insulator 5 The end face of winding 4 extends, and then can be bent upwards the outside through to Embedding Material.By heat conduction reinforced interface 12,13, 14 thermal couplings provided ensure that the optimal heat from induction coil 3 to metal inductance device shell 2 is transmitted.It is not depended in addition, heat is transmitted The thermal conductivity of Embedding Material, this is because it is not dominated by Embedding Material.Therefore, Embedding Material can be designed as mainly having There is low viscosity, to fill small―gap suture during potting process.
The inductor shell 2 individually described in fig. 2 is included in the cooling ribs 24 on the outside of it.On the inside of it, inductor shell Body 2 includes the contact area 16 and 17 for heat conduction reinforced interface 12 and 13.In these contact areas 16 and 17, metal sensor Device shell 2 can be covered before being inserted into heat conduction reinforced interface by some heat transfer materials of such as heat-conducting cream, and/or heat transfer is strong Contact area 16 and 17 can be bound to by changing interface 12 and 13.
Perspective bottom view according to fig. 3 shows heat conduction reinforced interface 12 relative to inductor winding 4 and magnetic core 6 and 13 Position.The every a pair for the induction coil 3 being arranged side by side can be equipped with continuous metal abdominal belt rather than the heat conduction reinforced interface of C-shaped 12。
Embodiment according to the electrical inductor assembly 1 of Fig. 4 includes metal inductance device shell 2, will by metal enclosed plate or Any other metal enclosed object for not describing herein is closed.Further, electrical contact window 18 is provided for contact sense Answer the inductor winding 4 of coil 3.A pair of of induction coil 3 in the induction coil 3 covered by common coil cap 11 in Fig. 5 and Fig. 6 is individually described, and shows following details.Towards magnetic core 6, electrical contact window 18 is framed by the rib 19 of spool 20, to keep Towards the required minimum creep distance and clearance distance of any point of the electrical contact window 18 of magnetic core 6.Towards metal inductance device The metal enclosed plate of shell 2, electrical contact window 18 are covered by the rib 21 of neighbouring coil cap 11, and window is in electrical contact with same holding 18 towards any point of metal enclosed plate required minimum creep distance and clearance distance.Here, keeping minimum clearance distance It will be prior aspect.It is advantageous that the rib 21 of adjacent threads ring cover 11 is interconnected and/or overlaps each other.It is not to lead to It crosses and is maintained at using being in direct contact between the element for the shape cooperation for keeping extension 15 in the core of adjacent lines ring cover 11 Pre-defined distance between axially adjacent induction coil 3, but alternatively, or in addition also can by using positioned at Being in direct contact to keep the pre-defined distance between the element of the shape cooperation at the rib 21 of adjacent threads ring cover 11.Very These details can be extremely seen from Fig. 8 described below.Coil cap 11 also comprises tubular projections 23, tubular projections 23 Lag screw 8 is surrounded in the case where lag screw 8 extends through coil cap 11.This ensures the institute of the end face of inductor winding 4 Required minimum creep distance and clearance distance a little equally retains towards lag screw 8.Further, heat conduction reinforced herein Interface 14 only extends between lag screw 8, that is, it seems reality in Fig. 1 to Fig. 3 that heat conduction reinforced interface 14, which is not provided with, Apply the through-hole for lag screw 8 in example.Nevertheless, heat conduction reinforced interface 14 transmits to come towards metal inductance device shell 2 Heat between two adjacent induction coils 3.
Show that coil cap 11 is configured to attach to induction coil 3 in the axial direction of induction coil 3 in fig. 5 and fig..It changes Sentence is talked about, and referring to the embodiment shown, each coil cap 11 attaches to the respective end of induction coil 3 from top and from downside Face 27.Therefore, ensure that two parallel-oriented induction coils 3 are positioned relative to each other pre-defined via coil cap 11 In axial direction.The coil cap 11 that its respective induction coil 3 is attached to from the axial direction of induction coil 3 is shown as common Coil cap 11 attaches to two induction coils 3 simultaneously.However, for single induction coil 3 coil cap 11 Preferably also from The axial direction of induction coil 3 attaches to induction coil 3.Coil cap 11 can be formed as the structure of cup-shaped, fully cover spool 20 side only has the opening for core 6, and provides the desired overlapping on electrical insulator 5;Or coil cap 11 It can be formed as cricoid structure, cover the outside of the just side of sufficiently large spool 20, and desired overlapping is provided. It is contemplated that other forms.
Fig. 7 shows more details, and heat conduction reinforced interface 12 and 13 is a part for metal inductance device shell 2 herein.Into one Step ground provides installation point 22 will be installed on metal inductance device shell 2 according to Fig. 4 according to the sub-component spiral of Fig. 6.
Fig. 8 shows the induction being arranged on its common magnetic core 6 other than metal inductance device shell 2 according to Fig. 4 The stereogram of coil 3.Here, before induction coil 3 is inserted into metal inductance device shell 2, whole arrangements of induction coil 3 and Its common magnetic core 6 is fixed by end member 10, lag screw 8 and nut 9.
The electrical inductor assembly described in Fig. 4 to Fig. 8 is similar to according to the embodiment of the electrical inductor assembly 1 of Fig. 9.It is only Difference lies in electrical contact windows 18 not to be covered by the rib 21 of the coil cap 11 of the open side towards metal inductance device shell 2, this It is since metal enclosed plate is not used in closing metal inductance device shell 2 herein.
Figure 10 is shown in greater detail, and how is the inductor winding 4 of the induction coil 3 of electrical inductor assembly 1 according to the present invention It is wound around spool 20.In the present embodiment, the electric conductor 25 of inductor winding 4 is foil-like, and electric conductor 25 is each Layer is separated by insulation foil 26.The insulation foil 25 being formed of an electrically insulating material is similarly formed the excircle of covering inductor winding 4 Electrical insulator 5.The width of insulation foil 26 is more than the width of the electric conductor 25 of foil-like, and the foil 26 that insulate is in inductor winding 4 Electric conductor 25 is extended beyond at two end faces 27.Therefore, each layer of electric conductor 25 is mutually electrically insulated enough.In order to equally carry For the required minimum creep distance 28 towards any metal inductance device shell that will wherein arrange induction coil 3, in addition to line Except axis 20, the coil cap 11 of electrically insulating material is provided.Similar with spool 20, coil cap 11 is equally formed of an electrically insulating material, Or and coil cap 11 is the end face 27 of independent covering inductor winding 4 or covers inductor winding 4 together with spool 20 End face 27.Coil cap 11 equally covers the adjacent domain for the electrical insulator 5 that the excircle of inductor winding 4 is covered.Institute The coverage area of the coil cap 11 of description ensures any point of the end face 27 of inductor winding 4 along without coil cap 11 or line The distance of any approach of the electrically insulating material of axis 20 to metal shell 2 is at least required minimum creep distance 28.
Creepage distance between two conductive parts be typically not through any insulation bulk material but along Any possible surface between these conductive parts of insulator surface is orientated the shortest distance in path.In Fig. 10, lead to Cross example mode clearly depict it is between inductor winding 4 and metal inductance device shell 2, without by electrical insulator 5, One possible creepage distance of the electrically insulating material of spool 20 and coil cap 11.The only design of coil cap 11 keeps institute It is longer than required minimum creep distance 28 to state creepage distance 28, will be explained in further detail below:
By referring to Figure 10, it becomes evident that be can generate any climb power path (and be specifically from inductor around Any of the beginning of end face 27 of group 4 climbs power path) along the electrical isolation in coil cap 11 and the excircle of covering inductor winding 4 Lap between the adjacent domain of body 5 orients.Therefore, by changing lap, it can purposefully change and climb electricity Distance.For example, reducing the lap (and optionally as well increasing the width at heat conduction reinforced interface 12) of coil cap 11 causes The reduction of creepage distance;However the lap of increase coil cap 11 (and optionally as well reduce heat conduction reinforced interface 12 Width) lead to the increase of creepage distance.Therefore, via the design for changing coil cap 11, especially via change 11 phase of coil cap Design for its lap, it can be ensured that can generate it is any it is possible climb power path include required minimum climb electricity away from From 28.The value of minimum creep distance 28 depends on the application of individual, and is particularly depending in induction coil 3 and metal inductance The peak value of potential difference between device shell 2.Value the indicating in specification document of minimum required creepage distance 28 and because This is known to the skilled in the art.Same principle about creepage distance explained above is equally applicable to clearance distance.
In the embodiment of the induction coil 3 of Figure 11, electric conductor 25 is the conducting wire using varnished insulation.Varnished insulation is sufficiently used for Each wire turn of conducting wire is electrically insulated relative to each other.However, the electrical isolation of the excircle for inductor winding 4, provides Made of insulation foil individual electrical insulator 5.Optionally, electric conductor 25 can be foil-like, have each of conducting wire The varnished insulation that a wire turn insulate relative to each other and the individual electrical insulator 5 at the excircle of inductor winding 4. Coil cap 11 be re-used for ensuring inductor winding 4 (end face 27 for being especially considering that inductor winding 4) with put wherein Set the required minimum creep distance 28 between any metal inductance device shell 2 of induction coil 3.In end face 27 and such gold The creepage distance belonged between inductor shell is also not extend through electrical insulator 5, spool 20 and coil cap between them The shortest distance of 11 electrically insulating material.
Embodiment according to Figure 12 includes the embodiment of the induction coil 3 of Figure 10.In addition, metal abdominal belt 29 is depicted, The entire excircle for the inductor winding 4 not covered by the coil cap 11 positioned at the outside of electrical insulator 5 can be closed, and Heat conduction reinforced interface 12 as the metal inductance device shell 2 that direction indicates in fig. 12.This metal abdominal belt 29 has no effect on By the required minimum creep distance 28 of the holding of coil cap 11 towards metal inductance device shell 2.Coil cap 11 is together with spool 20 are equally used for retaining towards the required minimum creep distance 28 of magnetic core 6, even if in this way, wherein 7 edge of vertical component of magnetic core 6 The end face 27 for inductor winding 4 extends.
The embodiment equally shown in Figure 11 and Figure 12 provides option, with by changing coil cap 11 and covering inductance The lap of the adjacent domain of the electrical insulator 5 of the excircle of device winding 4 purposefully changes creepage distance.Therefore, it closes It is equally applicable to the embodiment shown in Figure 11 and Figure 12 in the modification principle for the creepage distance that Figure 10 is mentioned.
The list of reference number
1 electrical inductor assembly
2 metal inductance device shells
3 induction coils
4 inductor windings
5 electrical insulators
6 magnetic cores
7 vertical components
8 lag screws
9 nuts
10 end members
11 coil caps
12 heat conduction reinforced interfaces
13 heat conduction reinforced interfaces
14 heat conduction reinforced interfaces
15 extensions
16 contact areas
17 contact areas
18 electrical contact windows
19 ribs
20 spools
21 ribs
22 installation points
23 protruding portions
24 cooling ribs
25 electric conductors
26 insulation foils
27 end faces
Minimum creep distance necessary to 28
29 metal abdominal belts

Claims (20)

1. a kind of electrical inductor assembly (1), including:
At least one induction coil (3), at least one induction coil (3) include
Spool (20), is formed of an electrically insulating material, and
Inductor winding (4) is made of the electric conductor (25) being wrapped on the spool (20),
The inductor winding (4) has excircle and two end faces (27), and
Electrical insulator (5) covers the excircle of the inductor winding;
Metal inductance device shell (2), at least partially around at least one induction coil (3);And
Embedding Material is contacted at least one induction coil (3) and the metal inductance device shell (2) and by institute It states at least one induction coil (3) and is thermally coupled in the metal inductance device shell (2),
It is characterized in that, the coil cap (11) being formed of an electrically insulating material covers the inductor winding (4) at least partly The adjacent domain of the excircle of the covering inductor winding (4) of end face (27) and the electrical insulator (5) so that described Any point of the end face (27) of inductor winding (4), absolutely along the electricity without the coil cap (11) or the spool (20) Any approach of edge material, until at least required minimum creep distance (28) of the distance of the metal inductance device shell (2), Described in coil cap (11) be configured to attach at least one induction from the axial direction of at least one induction coil (3) Coil (3).
2. electrical inductor assembly (1) according to claim 1, wherein the spool (20) is disposed on magnetic core (6), It is characterized in that, any point of the end face (27) of the inductor winding (4), along without the coil cap (11) or the line Any approach of the electrically insulating material of axis (20), until at least described required minimum of another distance of the magnetic core (6) is climbed Electrical distance (28).
3. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that minimum creep distance is necessary to described 1.6mm, 6.4mm or 12.7mm.
4. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that the coil cap (11) contacts the gold Belong to inductor shell (2).
5. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that the coil cap (11) or the line The end face (27) of the inductor winding (4) is completely covered together with the spool (20) for ring cover (11).
6. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that in addition to being provided to the inductor winding (4) except the electrical contact window (18) in channel, the coil cap (11) or the coil cap (11) are together with the spool (20) end face (27) of the inductor winding (4) is completely covered.
7. electrical inductor assembly (1) according to claim 6, which is characterized in that the electrical contact window (18) is at least partly Ground is framed by the rib (19) for extending through the spool (20) of the opening in neighbouring coil cap (11).
8. the electrical inductor assembly (1) stated according to claim 6, which is characterized in that towards the metal inductance device shell (2) and/ Or towards the metal inductance device shell (2) metal enclosed plate the electrical contact window (18) by neighbouring coil cap (11) Rib (21) masking.
9. electrical inductor assembly (1) according to claim 7, which is characterized in that towards the metal inductance device shell (2) And/or towards the metal inductance device shell (2) metal enclosed plate the electrical contact window (18) by neighbouring coil cap (11) rib (21) masking.
10. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that the coil cap (11) is only partially Cover the electrical insulator (5) covered to the excircle of the inductor winding (4).
11. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that the outer circle of the inductor winding (4) The electrical insulator (5) in week is provided by the continuous insulation foil (26) for surrounding the excircle of the inductor winding (4).
12. electrical inductor assembly (1) according to claim 11, wherein the electric conductor (25) is conductor foil, and described Conductor foil is wrapped in the spool (20) together on the insulation foil (26), and the insulation foil (26) extends beyond institute in the axial direction State conductor foil.
13. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that at least one heat conduction reinforced interface (12) region and the metal electricity of the excircle of the covering inductor winding (4) of the electrical insulator (5) are arranged on Between sensor shell (2).
14. electrical inductor assembly (1) according to claim 13, wherein the heat conduction reinforced interface (12) includes surrounding institute State the metal abdominal belt (29) of the circumference of inductor winding (4).
15. electrical inductor assembly (1) according to claim 1 or 2, wherein the spool (20) is disposed in magnetic core (6) On, which is characterized in that at least one heat conduction reinforced interface (13) is arranged on the region of the magnetic core (6) and the metal inductance Between device shell (2).
16. electrical inductor assembly (1) according to claim 1 or 2, wherein the spool (20) of two induction coils (3) It is disposed in the parallel portion of magnetic core (6), which is characterized in that at least one heat conduction reinforced interface (14) is arranged on the electricity Between the opposite region of the excircle of the inductor winding (4) of the described two induction coils of covering (3) of insulator (5).
17. electrical inductor assembly (1) according to claim 14, which is characterized in that the heat conduction reinforced interface (12) includes Protruding portion in the metal inductance device shell (2) and the individual hardware in the metal inductance device shell (2) At least one of.
18. electrical inductor assembly (1) according to claim 15, which is characterized in that the heat conduction reinforced interface (13) includes Protruding portion in the metal inductance device shell (2) and the individual hardware in the metal inductance device shell (2) At least one of.
19. electrical inductor assembly (1) according to claim 16, which is characterized in that the heat conduction reinforced interface (14) includes Protruding portion in the metal inductance device shell (2) and the individual hardware in the metal inductance device shell (2) At least one of.
20. electrical inductor assembly (1) according to claim 1 or 2, which is characterized in that at least one coil cap (11) covering The end face (27) of two adjacent inductors windings (4) of two induction coils (3) being arranged side by side and/or individual coil cap (11) it is provided in two opposite end faces (27) of two neighbouring inductor windings (4) of two induction coils (3) Each end face.
CN201580024414.0A 2014-06-19 2015-06-15 It include the electrical inductor assembly at least one induction coil of metal inductance device shell thermal coupling Active CN106463244B (en)

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EP14173136.4A EP2958118A1 (en) 2014-06-19 2014-06-19 Inductor assembly comprising at least one inductor coil thermally coupled to a metallic inductor housing
PCT/EP2015/063361 WO2015193252A1 (en) 2014-06-19 2015-06-15 Inductor assembly comprising at least one inductor coil thermally coupled to a metallic inductor housing

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EP2958118A1 (en) 2015-12-23

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