EP1891648B1 - Support device for a toroidal core inductance and inductive component - Google Patents

Abstract

A carrier device for a toroidal-core choke includes a base plate, which has projecting wire-guiding devices. A holder for an inductive component includes the carrier device and an electrical isolation device. The holder can be part of an inductive component.

Description

It becomes a carrier device for a toroidal core choke. Furthermore, an inductive component is specified with the holder.

An insulating part is z. B. from the document DE 10223995 C1 known. The insulating part comprises the toroidal core of a toroidal core choke and has projections for fixing wire windings and for maintaining a grid dimension. The insulating part has webs in the middle region, which provide the potential separation.

Another insulating part is z. B. from the document DE 10308010 A1 known. The insulating part has radially outwardly extending webs, which are elastically deformable by the pressure in the radial direction.

Also from the documents DE 30 47 603 A1 . US 2004/0169567 A1 . JP 09260164 . WO 2005/073990 A1 . EP 1 220 242 A1 . WP 2006/039876 A1 and DE 199 32 475 A1 inductive components are known.

An object to be solved is to specify a holder for a toroidal core choke with a plurality of windings to be insulated from one another.

It is yellowing a support device for a toroidal core choke. The support device comprises a base plate which projecting, elongated wire guide devices, wherein the wire guide devices each comprise at least one wire guide channel, and wherein between the wire guide devices, a throttle portion is provided for receiving a toroidal core choke, so that the end faces of the toroidal core choke are turned to the wire guide devices.

In the following, preferred embodiments of the specified carrier device will be explained.

The wire guide devices extend to the side of the base plate, which is intended to receive a toroidal core choke.

The height of a wire guiding device is selected so that a wire guided therein, which is associated with a wire winding, is spaced from at least one other winding of the same annular core choke. The height of a wire guiding device may for example be selected so that it extends at least to the core hole set or at least to the center of the core hole. The height of a wire guide device can even go beyond the core hole center in one variant.

The height of a wire guide device is preferably substantially greater than its outer transverse dimension and / or the transverse dimension of a wire to be guided therein and / or the thickness of the base plate.

The height of a wire guiding device preferably exceeds the transverse dimension of a wire to be guided therein by at least a factor of two, in one variant by at least a factor of three.

In an advantageous variant, the height of a wire guiding device exceeds its outer transverse dimension or the thickness of the base plate by at least a factor of two, preferably by at least a factor of three.

A wire guide device according to the invention comprises at least one wire guide channel, which is designed in one variant as an elongated groove and in another variant as an elongated, continuous opening.

In the embodiment according to the invention, a throttle region for arranging a toroidal core choke is provided between the wire guiding devices.

The toroidal core choke can be arranged standing between the wire guide devices. The end faces of the toroidal core choke are turned to the wire guide devices and arranged transversely to the base plate.

A wire guide device may have a closed profile, a U-profile or an H-profile. A wire guide device may, for. B. be designed as a hollow tube or hollow cylinder or as a one-sided open half-pipe. In principle, any cross-sections of the wire guide device come into consideration.

In the base plate wire feedthrough openings may be formed, wherein a pair of these openings serves to maintain the grid dimension of a wire winding of the toroidal core choke.

The base plate may be divided in a longitudinal direction into edge regions and at least one central region arranged between these, wherein two wire guide devices are arranged in the at least one central region and face each other.

Preferably, two wire leadthrough openings are provided for each wire winding in each area of the base plate. The two wire feedthrough openings of a region are preferably arranged along a transverse direction.

A wire guide channel extends transversely to the base plate and opens into a wire feedthrough opening.

In an advantageous variant, a wire guide device has on its side facing the throttle region projections or rails or guides which extend along the main axis of the wire guide devices. The remote from the base plate ends of the projections are preferably chamfered.

In a variant, a wire guiding device has a latching device which faces the throttle region and which is preferably bounded on both sides by the projections. The latching device has, for example, a ribbing or latching elements suitable for toothing.

The specified carrier device can be used in a holder provided for an inductive component, which further comprises a holding device which can be inserted in the core hole of a toroidal core choke. This holding device can, for. B. be fixed by means of its preferably frontally arranged locking device on a locking device of the wire guide devices. The locking devices of the holding device are preferably formed as a counterpart to the locking devices of the wire guide devices. A counterpart is to be understood as meaning, in particular, a fitting part formed in a form-fitting manner with respect to the original.

A part of the holding device carrying the latching devices is preferably designed to protrude on both sides in the axial direction with respect to the ring core.

The holding device is preferably fixable in the core hole by elastic forces. The holding device is preferably made of an electrically insulating material. You can z. B. be an isolation device, which is designed star-shaped in a variant.

The described holder is particularly suitable for an inductive component with a toroidal core choke. The toroidal core choke comprises a toroidal core and a plurality of wire windings wound around the core, whose ends are passed through the wire penetrating openings of the base plate. The preferably provided as potential separation device holding device is inserted into the core hole of the toroidal core and fixed between the wire guide devices, wherein ends of one of the wire windings are guided in the wire guide channels of the wire guide devices.

• Figur 1 eine beispielhafte Trägervorrichtung für eine Ringkerndrossel in einer perspektivischen Ansicht;
• Figur 2 die Trägervorrichtung gemäß Figur 1 in einer Draufsicht von oben;
• Figur 3 ein induktives Bauelement mit einer Ringkerndrossel, der Trägervorrichtung für die Ringkerndrossel gemäß Figur 1 und einer in das Kernloch eingesetzten Potentialtrennungsvorrichtung;
• Figur 4 eine weitere Trägervorrichtung in einem Querschnitt parallel zur Längsrichtung der Basisplatte;
• Figur 5 eine Seitenansicht auf die Trägervorrichtung gemäß Figuren 4, 8;
• Figur 6 die Trägervorrichtung gemäß Figuren 4, 8 in einer Draufsicht von oben;
• Figur 7 die Trägervorrichtung gemäß Figuren 1 und 8 in einem Querschnitt quer zur Längsrichtung der Basisplatte;
• Figur 8 in einer perspektivischen Ansicht eine Halteanordnung für ein induktives Bauelement: die Trägervorrichtung gemäß Figuren 4, 8 (unten) und eine als Gegenstück zu dieser ausgebildete Potentialtrennungsvorrichtung (oben);
• Figur 9 die Halteanordnung gemäß Figur 8 in einer Teilquerschnittsansicht vor dem Einsetzen der Potentialtrennungsvorrichtung in die Trägervorrichtung;
• Figur 10 die Halteanordnung gemäß Figuren 8, 9 nach dem Einsetzen der Potentialtrennungsvorrichtung in die Trägervorrichtung.

In the following, the carrier device, the holder for an inductive component and an inductive component will be explained with reference to schematic and not to scale figures. Show it:

• FIG. 1 an exemplary support device for a toroidal core choke in a perspective view;
• FIG. 2 the carrier device according to FIG. 1 in a plan view from above;
• FIG. 3 an inductive component with a toroidal core choke, the carrier device for the toroidal core choke according to FIG. 1 and an electrical isolation device inserted in the core hole;
• FIG. 4 another support device in a cross section parallel to the longitudinal direction of the base plate;
• FIG. 5 a side view of the carrier device according to FIGS. 4 . 8th ;
• FIG. 6 the carrier device according to FIGS. 4 . 8th in a plan view from above;
• FIG. 7 the carrier device according to FIGS. 1 and 8th in a cross section transverse to the longitudinal direction of the base plate;
• FIG. 8 in a perspective view of a holding device for an inductive component: the carrier device according to FIGS. 4 . 8th (below) and an equipotential bonding device (above) formed thereon;
• FIG. 9 the holding arrangement according to FIG. 8 in a partial cross-sectional view prior to insertion of the potential separation device in the carrier device;
• FIG. 10 the holding arrangement according to FIGS. 8 . 9 after inserting the potential separation device in the carrier device.

Figures 1, 2 and 7 show various views of a carrier device, which serves as a carrier for a bobbin or a toroidal core choke. An entire inductive component with this carrier device is in FIG. 3 shown. In FIG. 7 a cross-section of the support device in the region of wire feedthrough openings 105 and 106 is shown.

The support device comprises a base plate 10 having wire guide devices 11, 12 protruding in a direction (upward). The wire guide devices 11, 12 are rod-like structures, each with a wire guide channel facing away from the throttle area. The wire guide devices 11, 12 are formed here with a U-profile.

The carrier device is preferably made of an electrically insulating material. In particular, plastics suitable for injection molding are suitable.

The base plate 10 and the wire guide devices 11, 12 are preferably in one piece, i. H. generated in a process step. It is also possible, however, to manufacture the base plate 10 and the wire guide devices 11, 12 separately from a material or from respectively different materials and to connect them firmly, preferably monolithically, to one another. It is also possible initially to provide the base plate 10 and to produce the wire guide devices 11, 12 thereon in a later method step.

In the FIG. 3 To be seen toroidal core choke comprises a toroidal core 2 and three wound on this core wire windings 41, 42, 43, each of which is at its own electrical potential.

The wire guide devices 11, 12 each serve for a secure spacing of the wire ends 33 of the wire winding 43 from the other wire windings 41, 42. This makes it possible to use wire windings without an insulating sheath. It can be used with an insulating varnish or possibly even not insulated wire windings.

The base plate 10 is divided in a longitudinal direction x into two edge regions and a middle region. The wire guide devices 11, 12 are arranged in the central region of the base plate 10. The wire guide devices 11, 12 are transverse to the longitudinal direction x of the base plate 10 facing each other. Between the wire guide devices 11, 12, a throttle area for receiving a toroidal core choke is provided.

Two wire feedthrough openings 101 and 102, 103 and 104, 105 and 106 are provided per area. The openings 101 to 106 are arranged in pairs along a transverse direction y. The pairs of openings serve in each case to maintain the grid dimension of ends 31, 32, 33 of the respective wire winding 41, 42, 43. The openings 101 and 102 serve for the passage of both ends 32 of the wire winding 42. Analogously serve the openings 103 and 104 for Conduction of ends 33 of the wire winding 43 and the openings 105 and 106 for the passage of ends 31 of the wire winding 41st

The wire guide channels of the wire guide devices 11 and 12 open into the openings 103 and 104, respectively.

The carrier device is preferably formed symmetrically with respect to an axis extending through its center, parallel to the direction x or y.

The openings 101 to 106 are preferably as in Fig. 7 shown openings 105, 106, wherein they have a portion with perpendicular to the main surface of the base plate 10 extending inner walls and a further portion which has a widening in cross section to the top of the base plate. The latter section facilitates the insertion of the wire ends 31, 32, 33 in the respective opening. The cross-section and the transverse dimension of the former portion of the respective opening is preferably adapted to the cross-section or the outer dimension of the wire end 31, 32, 33.

On the underside of the base plate 10 spacer feet 60 are provided for spacing between the base plate 10 and a not shown here, provided for mounting the inductive component circuit board.

End portions of the wire winding 43 are fixed by the walls of the wire guide devices 11, 12. Preferably, these end cuts are recessed in the respective wire guide channel, so that the wire section in cross section on the open side of the wire guide devices 11, 12 does not project beyond these devices.

The wire guide devices 11, 12 each have a surface 11a and 12a, which faces the top of these devices and extends obliquely to its lateral surface and its top. This bevel facilitates the insertion of a toroidal core between the wire guide devices 11, 12.

In FIG. 3 is an inductive component with an already explained support device and a counterpart to this formed potential separation device 5 is shown.

The end portions of the wire winding 43 are each fixed in the axial direction of the wire guide channel, ie transversely to the base plate 10. Characterized in that transverse to the base plate 10 extending end portions of the wire winding 43 are respectively fixed in the wire guide channel of the wire guide device 11 and 12, whereby their lateral slipping is prevented, the position of the toroidal core choke is fixed relative to the base plate 10.

The also in Fig. 8 shown potential separation device 5 is inserted into the core hole of the toroidal core 2. It has a central part 55 and three outgoing from this, star-shaped, in this variant elastically deformable webs 501 to 503, at the ends facing away from the center insulating 511, 512, 513 are provided.

The webs of an electrical isolation device can be dimensionally stable in a further variant and have elastically deformable, preferably expandable, devices at their ends facing the toroidal core.

In FIGS. 4 to 6 a further advantageous embodiment of a carrier device for a toroidal core choke is shown in different views. In FIGS. 8 to 10 different views of a holder are shown, which comprises this support device and an insertable into a core hole potential separation device 5. The support device according to the second embodiment is preferably substantially the same as the support device according to the first embodiment except for the differences explained below and apparent from the figures.

The wire guide devices 11 and 12 are mirror-symmetrical. Their design will be explained with reference to the wire guide device 11.

FIG. 4 shows a partial cross-sectional view of the support device according to the second embodiment with a view of the wire guide device 11 from the inside.

The wire guide device 11 has on its inner side facing the ring core hole a locking device 113, which is designed here as a latching surface with a ribbing. The ribbing extends along the axis of the wire guide device 11. The ribbing is designed so that the sliding of an electrical isolation device 5 to the base plate 10 out possible, but the sliding in the opposite direction is prevented.

The latching device 113 is bounded on both sides by rails 111 and 112. The rails 111 and 112 are directed toward the toroidal core choke facing projections of the wire guide device 11. These rails are parallel to the axis of the wire guide device.

The rails 111 and 112 are tapered towards the top of the wire guide device such that the introduction of a potential separation device 5 is facilitated.

The part of the potential separating device 5 facing the wire guiding device 11 is preferably designed such that it can glide smoothly between the rails 111, 112, but can not slide off laterally.

A side view of the carrier device according to FIG. 4 is in FIG. 5 shown. In this case, the outside of the wire guide device 11 can be seen.

The section AA of the carrier device according to 4 to 6 is in FIG. 7 shown. The section BB of this support device is in Fig. 9 and 10 to see.

In the FIG. 6 It is shown that the wire guide devices 11, 12 each have a substantially H-profile.

FIG. 8 shows a holder for an inductive component with a potential separation device 5 (above) and one in connection with the FIGS. 4 to 6 already explained support device (below).

The potential separation device 5 is inserted in the core hole of the toroidal core 2 and preferably z. B. fixed by means of elastic forces in this. With a block arrow is indicated that the potential separation device 5 - preferably inserted after insertion into the core hole of a ring core - between the wire guide devices 11 and 12 and is fixed between them by means of locking devices 50, 113 in the vertical direction and by means of projections of the wire guide devices in the longitudinal direction.

FIG. 9 shows the in FIG. 8 shown holder in another view.

On both end sides of the rigid insulating region 511, latching devices 50 designed as ribs are formed. The rigid insulating region 511, that is to say the part of the potential separation device 5 carrying the latching devices 50, protrudes in the axial direction on both sides beyond remaining parts of the potential separation device. Preferably, the axial size of the remaining parts of the potential separation device is adapted to the axial size of the toroidal core, wherein the insulating region 511 protrudes on both sides of the core and thus suitable for fixing the arrangement of the potential separation device 5 and the core 2.

In FIG. 9 is only one projection 111 and 121 of the wire guide device 11 and 12 visible. An upper end of the projection 111, 121 has a tapered surface 111a, 121a, respectively. In this case, beveled surfaces of the projections, which are assigned to the same wire guide device, facing each other.

In FIG. 10 is the bracket according to FIGS. 8 and 9 shown after snapping the potential separation device 5 between wire guide devices 11 and 12. The locking devices of a wire guide device and the potential separation device are adapted to one another in a form-fitting manner. The locking devices 50, 113, 123 are designed as a locking mechanism, wherein the movement of the potential separation device 5 is prevented upwards by the preferred direction of the toothing.

The wire guide devices 11, 12 may have any cross section or the wire guide channel with an arbitrary cross section. The wire guide devices 11, 12 may be formed in a variant as a hollow tube or hollow cylinder. The cross section of the wire guide channel is preferably adapted to the shape of the wire 31 to 33.

The shape of the base plate may be arbitrary, although a rectangular or square design is preferable.

The number of wire windings may differ from three. The number of wire feedthrough openings is preferably on adapted the number of wire windings. With a number of N> 3 wire windings, N-2 middle regions of the base plate 10 are preferably provided, wherein each of these middle regions is assigned a pair of wire guide devices lying opposite one another.

LIST OF REFERENCE NUMBERS

10

baseplate

101 - 106

screen apertures

11, 12

Wire guide device

111, 112, 121

rails

113, 123

locking device

2

toroidal

31, 32, 33

Ends of wire windings

41, 42, 43

wire windings

5

Isolation device

50

Rest area

501, 502, 503

deformable webs

511, 512, 513

insulating regions

55

Middle part of the potential separation device

60

Distance feet

Claims (23)

1. Support apparatus for a toroidal-core inductor, with a base plate (10), which comprises protruding, elongated wire guide apparatuses (11, 12), wherein the wire guide apparatuses (11, 12) each contain at least one wire guide channel, and wherein an inductor region for accommodating a toroidal-core inductor is provided between the wire guide apparatuses (11, 12), with the result that the end faces of the toroidal-core inductor point towards the wire guide apparatuses (11, 12).
2. Support apparatus according to Claim 1, wherein the height of the wire guide apparatuses (11, 12) exceeds the transverse dimension of a wire to be guided therein by a factor of at least two.
3. Support apparatus according to Claim 1, wherein the height of the wire guide apparatuses (11, 12) exceeds their outer transverse dimension by a factor of at least two.
4. Support apparatus according to Claim 1, wherein the height of the wire guide apparatuses (11, 12) exceeds the thickness of the base plate (10) by a factor of at least two.
5. Support apparatus according to one of Claims 1 to 4, wherein the wire guide apparatuses (11, 12) have a U profile.
6. Support apparatus according to one of Claims 1 to 4, wherein the wire guide apparatuses (11, 12) are in the form of a half-tube which is open at one end.
7. Support apparatus according to one of Claims 1 to 6, wherein the wire guide channel faces away from the inductor region.
8. Support apparatus according to one of Claims 1 to 4, wherein the wire guide devices (11, 12) are each in the form of a hollow tube.
9. Support apparatus according to one of Claims 1 to 8, wherein wire leadthrough openings (101-106) are formed in the base plate (10).
10. Support apparatus according to one of Claims 1 to 9, wherein the base plate (10) extends along a longitudinal direction (x) and a transverse direction (y), and wherein the base plate (10) is divided into two peripheral regions and a central region along the longitudinal direction (x), and wherein the wire guide apparatuses (11, 12) are arranged in the central region.
11. Support apparatus according to Claim 10, wherein in each case two wire leadthrough openings (101-106) for in each case one wire winding (41, 42, 43) are provided in the peripheral regions and the central region.
12. Support apparatus according to Claim 11, wherein the two wire leadthrough openings (101-106) of one of the regions are arranged parallel to the transverse direction (y).
13. Support apparatus according to one of Claims 10 to 12, wherein the wire guide channels run perpendicular to the base plate (10) and open out into the wire leadthrough openings (103, 104).
14. Support apparatus according to one of Claims 1 to 13, wherein a wire guide apparatus (11, 12) has projections (111, 112), which run along the main axis of the wire guide apparatuses (11, 12), on that side of the wire guide apparatus which faces the inductor region.
15. Support apparatus according to Claim 14, wherein one end of a projection (111, 112), said end facing away from the base plate (10), is bevelled.
16. Support apparatus according to one of Claims 1 to 15, wherein a wire guide apparatus (11, 12) has a latching apparatus (113) which faces the inductor region.
17. Support apparatus according to Claim 16, wherein a latching apparatus (113) of the respective wire guide apparatus (11, 12) is delimited laterally by the projections (111, 112).
18. Support apparatus according to Claim 17, wherein the latching apparatus (113) has a ribbed portion.
19. Support apparatus according to one of Claims 1 to 18, wherein the base plate (10) has spacer feet on its underside.
20. Inductive component,

    - with the support apparatus according to one of Claims 16 to 19,

    - with a potential isolation apparatus (5), which can be inserted in the tap hole of a toroidal-core inductor and can be fixed using a latching apparatus (113, 123) of the wire guide apparatuses (11, 12).
21. Inductive component according to Claim 20, wherein the potential isolation apparatus (5) has latching apparatuses (50), which can be fixed on latching apparatuses (113, 123) of the wire guide apparatuses (11, 12).
22. Inductive component according to Claim 21, wherein the latching apparatuses (50) of the potential isolation apparatus (5) are formed as a mating piece with respect to the latching apparatuses (113, 123) of the wire guide apparatuses (11, 12).
23. Inductive component according to one of Claims 20 to 22,

    - with a toroidal core (2) and a plurality of wire windings (41, 42, 43), whose ends (31, 32, 33) are guided through the wire leadthrough openings (101-106) in the base plate (10),

    - wherein the potential isolation apparatus (5) is inserted in the tap hole of the toroidal core (2) and is fixed on the wire guide apparatuses (11, 12),

    - wherein ends (33) of one of the wire windings (41, 42, 43) are guided in the wire guide apparatuses (11, 12).

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