CN109996590B

CN109996590B - Coil assembly and model car with same

Info

Publication number: CN109996590B
Application number: CN201780071224.3A
Authority: CN
Inventors: C·科克; C·阿尔格
Original assignee: Stadlbauer Marketing und Vertrieb GmbH
Current assignee: Carera Toys Co ltd
Priority date: 2016-11-22
Filing date: 2017-11-21
Publication date: 2021-04-16
Anticipated expiration: 2037-11-21
Also published as: EP3544706A1; CN109996590A; WO2018095567A1; US20190374867A1; EP3544706B1; DE202016007184U1

Abstract

The invention relates to a coil assembly (22) having at least one base plate (12) and at least one first coil part (28a) and one second coil part (28b), wherein the base plate (12) made of an electrically insulating material has a basic shape which extends in a planar manner, the base plate (12) has an upper side and a lower side opposite the upper side, at least the first coil part (28a) and the second coil part (28b) form a coil winding, the first coil part (28a) is arranged on the upper side of the base plate (12) and the second coil part (28b) is arranged on the lower side of the base plate.

Description

Coil assembly and model car with same

Technical Field

The invention relates to a coil assembly and a model car with the coil assembly.

Background

A model car race track (also known as a guide way track or guide way track) is a technical device with which electrically driven model cars can be driven in a guided manner along a roadway.

The model car track comprises the following tracks: the rail can be assembled, for example, from a plurality of rail parts that can be plugged together. The rail can have two lanes, each with a guide channel for guiding the model vehicle and two busbars for an electrically driven current supply of the model vehicle, wherein the model vehicle can be moved along the respective lanes. The current collectors located in the respective model car are thus in contact with the respective busbar in order to ensure the transmission of electrical energy. The handheld controller can be used to control the speed and braking behavior of the respective model car, respectively. However, when driven around a curve, for example due to centrifugal forces acting on the model car, an interruption of the contact between the collector plate and the collector of the model car may occur, with the result that the electrically driven energy supply to the model car is interrupted and the model car loses speed.

Uninterrupted energy supply is possible by contactless energy transmission. However, this requires the following coil assembly: the coil assembly is simple to produce and takes up little installation space, and the coil assembly, which is assigned to the model car, forms a secondary element or coil of a transformer assembly for supplying the model car with electrical energy, wherein the primary element of the transformer assembly is assigned to the track.

Disclosure of Invention

It is therefore an object of the present invention to provide a coil arrangement which is simple to produce and which takes up little installation space.

According to the invention, this object is achieved by a coil assembly of the type described above having the features of claim 1. Advantageous embodiments of the invention are described in further detail.

To this end, in a coil assembly of the above-mentioned type, according to the invention, the coil assembly has at least one base plate and at least one first coil portion and a second coil portion, wherein the base plate, which is manufactured from an electrically insulating material, has a basic shape extending in a planar manner, the base plate having an upper side and a lower side opposite to the upper side, at least the first coil portion and the second coil portion forming a coil winding, the first coil portion being disposed on the upper side and the second coil portion being disposed on the lower side.

This has the advantage that a particularly compact coil arrangement is provided in this way, which takes up little installation space. Furthermore, the manufacture of the coil assembly is simplified by the first coil part and the second coil part being in the form of planes on the upper side or the lower side of the substrate, respectively, since planar or thick-film technology can be used for this purpose.

According to a preferred embodiment, the substrate element has a ferrite core. As a result, the magnetic field is bound and concentrated, thereby improving the efficiency of the non-contact energy transfer.

According to a further preferred embodiment, the substrate element has a first circuit board section and a second circuit board section, wherein the upper side of the first circuit board section forms the upper side of the substrate element and the lower side of the second circuit board section forms the lower side of the substrate element. Thus, the two circuit board portions can be formed from circuit board material that is economical and easy to work with, wherein the first coil portion and the second coil portion can be manufactured by etching a conductive coating (e.g., a copper coating).

According to another preferred embodiment, the connection wire extends through the first circuit board portion and the second circuit board portion so as to electrically connect the first coil portion with the second coil portion.

According to another preferred embodiment, the lower side of the first circuit board part is arranged on the upper side of the ferrite core, and the upper side of the second circuit board part is arranged on the lower side of the ferrite core. In this way, a coil assembly having a particularly compact structural form can be provided.

According to a further preferred embodiment, the further coil portions form at least three to eight coil windings, in particular the further coil portions form five coil windings. In this way, a coil assembly with a particularly efficient coil assembly can be provided in order to ensure a particularly efficient energy transfer.

According to another preferred embodiment of the invention, the spiral vector of the coil assembly is located substantially in the plane of the substrate. In this way, a particularly effective and thus efficient coupling of the coil assembly as secondary element of the transformer assembly to the secondary element can be achieved if the primary element is, or comprises, a busbar extending longitudinally in the direction of travel of the model vehicle.

According to a further preferred embodiment of the invention, the base element has a first extension direction extending between the two coil portions, a second extension direction extending at right angles to the first extension direction, and a third extension direction extending at right angles to the first extension direction and to the second extension direction, wherein the spiral vector of the coil assembly extends substantially in the direction of the second extension direction and/or the third extension direction. In this way, such a coil assembly can be configured to occupy little structural space in a model vehicle.

The invention also relates to a model car with such a coil assembly.

Drawings

The invention is described in detail below with reference to the attached drawing figures, wherein:

figure 1 shows a schematic cross-sectional view of an exemplary embodiment of a model racing track according to the invention,

figure 2 shows a schematic diagram of a transformer assembly for the model racecourse of figure 1,

figure 3 shows a view from above of the first substrate element shown in figure 2,

figure 4 shows a view from below of the second substrate element shown in figure 2,

figure 5 shows a working scenario of the model racetrack shown in figure 1,

figure 6 shows a first wiring variant of a busbar with a track of two lanes,

figure 7 shows a second wiring variant of the busbar with a track of two lanes,

fig. 8 shows another exemplary embodiment of a model car track according to the present invention, wherein the track is provided with a bus board for each lane of the track, the track having a plurality of lanes.

Detailed Description

Fig. 1 shows a model car track 2 (also known as a guideway car track or guideway track).

The model car track 2 has a track 4 consisting of a plurality of track sections that can be plugged together, in the present exemplary embodiment the track 4 has two

lanes

6a, 6b, both

lanes

6a, 6b being for the model car 10. Fig. 1 shows only one model car 10.

In the present exemplary embodiment, the rail 4 has a recess (slot) 8a, 8b assigned to each

lane

6a, 6b, the

recess

8a, 8b being arranged centrally with respect to the

respective lane

6a, 6b, and the

recess

8a, 8b engaging with a guide element 30, for example a guide pin of the model car 10, thus enabling the guidance of the model car 10 along the respective lane, in this case the lane 6 a.

Furthermore, in the present exemplary embodiment, the rails 4 each have two

bus bars

14a, 14b, 14c, 14d arranged on each side of the

respective recess

8a, 8b, wherein the

recesses

8a, 8b are assigned to the first lane 6a or the second lane 6 b. The cross section of the first and

second busbars

14a, 14b, 14c, 14d has a U-shaped profile and is pressed into other recesses in the rail 4.

The

bus plates

14a, 14b, 14c, 14d are each formed as a single piece and from the same material. Further, the

bus plates

14a, 14b, 14c, 14d are made of a magnetic material. In this way, the model car 10 can be held in the lane 6a by magnetic force by means of permanent magnets (not shown) interacting with the

bus plates

14a, 14 b.

As will be explained later, the two busbar pairs (busbar pairs)14a, 14b or 14c, 14d form a primary element 18 of a transformer assembly 16 for contactless energy transmission to the model car 10.

The transformer assembly 16 for contactless energy transfer to the model car 10 further comprises a secondary element 20 assigned to the model car 10 to couple the electromagnetic field generated by the primary element 18.

In the present exemplary embodiment, the secondary element 20 is a coil assembly 22.

In addition to transmitting operating energy, for example, for accelerating or braking the model car 10, it is also possible to transmit control signals using the transformer assembly 16, for example, which are modulated to have a higher frequency and then filtered out on the model car side.

Referring now also to fig. 2, for simplicity, fig. 2 shows only the first lane 6a of the two

lanes

6a, 6 b. However, the following description is similarly applicable to the second lane 6b having the recess 8b and the

bus plates

14c and 14 d.

Fig. 2 shows that the recess 8a and the two

busbars

14a, 14b each have a main direction of extension H, which is directed in the direction of travel along the lane 6a, in which direction of extension its dimension is significantly greater than in the direction of the other directions of extension.

Further, fig. 2 shows that the coil assembly 22 has a substrate 12. In the present exemplary embodiment, the substrate 12 has a first substrate element 24a and a second substrate element 24b and a ferrite core 26 arranged between the first substrate element 24a and the second substrate element 24 b.

In the present exemplary embodiment, the first substrate member 24a and the second substrate member 24b are circuit boards, respectively. The circuit board has a basic shape (rectangular basic shape in the present exemplary embodiment) extending in a planar manner, the basic shape having an upper side and a lower side opposite to the upper side, respectively. The circuit boards are each composed of an electrically insulating material and a conductor path disposed on the electrically insulating material. Fiber-reinforced plastics are for example commonly used as insulating materials. The conductor paths are etched, for example, from a thin copper plating (copper) applied beforehand to the insulating material.

In the present exemplary embodiment, the conductor path located on the upper side of the first substrate element 24a forms a plurality of first coil portions 28a, whereas in the present exemplary embodiment, the other conductor path located on the lower side of the second substrate element 24b forms a plurality of second coil portions 28 b. Together, one first coil portion 28a and one second coil portion 28b form the coil windings of the coil assembly 20, respectively.

For this purpose, connection lines (not shown) are provided which extend through the first and

second substrate elements

24a, 24b and which connect the respective first coil portions 28a with the respective second coil portions 28b in an electrically conductive manner. Thus, in the present exemplary embodiment, the

coil portions

28a, 28b form three coil windings. However, five to eight coil windings may be provided.

Further, fig. 2 shows that the ferrite core 26 is arranged with its upper side positioned on the lower side of the first substrate member 24a, and the lower side of the ferrite core 26 is arranged on the upper side of the second substrate member 24 b.

The ferrite core 26 is a member made of ferrite, which acts as a core of the coil assembly 22 to enhance the inductance or guide the magnetic field of the coil assembly 22. Ferrite is understood to include hematite (Fe) composed of iron oxides₂O₃) Magnetite (Fe)₃O₄) And/or other materials made of metal oxides that are poorly conductive or non-conductive ferrimagnetic ceramic materials. Ferrite is hard magnetic depending on the compositionOr soft magnetic.

The coil windings formed by the respective first and

second coil portions

28a, 28b have a helical vector S, as shown in fig. 1, which lies substantially in the plane of the substrate 12 and illustrates the helical configuration of the coil windings of the coil assembly 22.

It can also be seen that the spiral vector S is arranged substantially at right angles to the main direction of extension H of the

busbars

14a, 14 b.

Furthermore, fig. 2 shows that the substrate 12 has a first direction of extension I, a second direction of extension II and a third direction of extension III.

In the present exemplary embodiment, the first extending direction I extends in the height direction Z between the first substrate member 24a and the second substrate member 24 b. The second direction of extension II extends at right angles to the first direction of extension I in the direction of the spiral vector S or in the width direction Y. Furthermore, the third direction of extension III extends at right angles to the first direction of extension I and the second direction of extension II in the direction of the main direction of extension H or in the depth direction X.

In the present exemplary embodiment, the substrate 12, the first substrate element 24a, the second substrate element 24b and the ferrite core 26 have significantly larger dimensions in the direction of the second extension direction II and the third extension direction III than in the first extension direction I, respectively. In other words, they each have a rectangular, in particular plate-shaped, basic shape.

Additionally, reference is now made to fig. 3 and 4.

Fig. 3 and 4 show that the first coil portion 28a and the second coil portion 28b have an elongated shape, i.e. their respective dimensions in the direction of the third direction of extension III are larger than the respective dimensions in the direction of the second direction of extension II. Furthermore, the first coil portion 28a and the second coil portion 28b extend at an angle to the second direction of extension II, which angle is not equal to a right angle. In the present exemplary embodiment, the first coil portion 28a and the second coil portion 28b extend at an angle of 75 ° to 85 ° or 95 ° to 110 ° to the second direction of extension II.

In this way, a particularly compact coil arrangement 22 is provided which takes up little installation space. Furthermore, by forming the first coil portion 28a and the second coil portion 28b planarly on the upper side or the lower side of the substrate 12, respectively, the manufacturing of the coil assembly 22 is simplified, since planar or thick film technology can be used for this purpose.

The operation of the model track 2 will additionally be explained with reference to fig. 5, wherein, for the sake of simplicity, only the first 14a of the two

busbars

14a, 14b of the first track 6a is shown for the primary element 18.

In operation, an alternating current having a frequency of 400kHz flows through the bus plate 14 a. A magnetic field M is formed around the busbar 14a, wherein concentric field lines extend around the busbar 14 a. The course of the field lines (coarse) can be described by a rotation vector R, which is vertical perpendicular to the plane described by the field lines.

The field lines pass through the secondary element 20 or the coil assembly 22 and induce a voltage in the secondary element 20. The voltage induced in the secondary element 20 can then be used to supply the electric drive of the model car 10, so that the model car 10 can be moved in a travel direction F which is predetermined by the main extension direction H of the recess 8 or the busbar 14 a. The direction of travel F and the rotation vector R are therefore oriented substantially at right angles to one another. Thus, substantially is understood to mean within usual manufacturing tolerances.

Thus, the speed of the match-type vehicle 10 can be adjusted by changing the current intensity of the current flowing through the bus bars 14a and 14 b.

Due to the contactless transmission of electrical energy, contact interruptions such as occur in the prior art can no longer cause interruptions in the supply of electrical energy.

In addition to the first lane 6a shown in fig. 1, in the present exemplary embodiment, a second lane 6b for a second model car (not shown) is provided, and this second lane 6b has the same structure as the first lane 6 a. However, in order to avoid as much as possible interference between the two model vehicles 10, and thus interference of the energy transmission, a current with a frequency at least 1.5 times as high as the first frequency flows through the

busbar

14c, 14d of the second lane 6 b. In the present exemplary embodiment, the second frequency is 600 kHz.

In addition, referring now to fig. 6 and 7, fig. 6 and 7 show, by way of example, a wiring variant of the two

busbars

14a, 14b, 14c, 14d with respect to the first lane 6a of the two

lanes

6a, 6b of the track 4.

Fig. 6 shows a first wiring variant in which the two

busbar plates

14a, 14b of the first track 6a are electrically connected in parallel. This allows the use of double conductor cross-sections of the two

busbar plates

14a, 14b, so that double the current intensity can be applied to the

busbar plates

14a, 14 b.

Fig. 7 shows a second wiring modification in which the two

bus plates

14a, 14b of the first lane 6a are electrically connected in series. Therefore, the two

bus plates

14a, 14b form a two-conductor loop, so that the energy transfer efficiency is improved.

Reference is now made to fig. 8.

This shows a rail 4' of the second exemplary embodiment, which, in contrast to the rail 4 shown in fig. 1, has only two

recesses

8a, 8b, in each of which recesses 8a, 8b a busbar 14a ', 14b ' of the further exemplary embodiment is fitted.

The structure of the bus boards 14a ', 14b ' according to this exemplary embodiment will be explained with reference to the bus board 14b ' assigned to the second lane 6 b.

The bus bar 14b' has a U-shaped profile with a slot base 32 and two flanges 34 extending from the slot base 32, the two flanges 34 extending in parallel in the present exemplary embodiment. Extending from each flange 34 is a tongue 36, the tongue 36 extending in the plane of the surface of the rail 4'.

The bus bars 14a ', 14b' according to this exemplary embodiment are each formed as a single piece and from the same material. Further, according to this exemplary embodiment, the bus plates 14a ', 14b' are made of a magnetic material. In this way, the model car 10 can here also be held in the lane 6a by magnetic force by means of permanent magnets (not shown) interacting with the busbar 14 a'. In particular, the two tongues 36 provide an enlarged surface on which the magnetic force can act, enabling the use of magnets of reduced dimensions in the model car 10, which occupy less structural space.

Furthermore, two bus plates 14a ', 14b ' are fitted into the respective recesses/

slots

8a, 8b such that the U-shaped bus plates 14a ', 14b ' are open in an upward direction, so that guiding elements 30, for example pins of the model car 10, can engage in the U-shaped bus plates 14a ' in order to guide the model car 10 in this way along the lane 6a defined by the recess 8 a. Thus, for each of the

runways

6a, 6b, the rail 4' has a particularly simple structure with only one busbar 14a ', 14b ', which busbar 14a ', 14b ' is arranged centrally in the present exemplary embodiment, wherein the busbars 14a ', 14b ' have a dual function, i.e. as a busbar and as a guide groove for the model car, respectively.

Claims

1. Model vehicle (10) having a coil assembly (22) for electrically powering the model vehicle, the coil assembly having at least one base plate (12) and at least one first coil portion (28a) and a second coil portion (28b),

wherein the substrate (12) made of an electrically insulating material has a basic shape extending in a planar manner, the substrate (12) having an upper side and a lower side opposite to the upper side,

at least the first coil portion (28a) and the second coil portion (28b) form a coil winding,

the first coil portion (28a) is arranged on the upper side, and the second coil portion (28b) is arranged on the lower side of the substrate (12).

2. Model car (10) according to claim 1, characterized in that said base plate (12) has a ferrite core (26).

3. Model car (10) according to claim 1 or 2, characterized in that the base plate (12) has a first circuit board part and a second circuit board part, wherein the upper side of the first circuit board part forms the upper side of the base plate (12) and the lower side of the second circuit board part forms the lower side of the base plate (12).

4. Model car (10) according to claim 3, characterized in that a connecting line extends through the first and second circuit board portions for electrically connecting the first coil portion (28a) with the second coil portion (28 b).

5. Model car (10) according to claim 3, characterized in that the lower side of the first circuit board part is arranged on the upper side of a ferrite core (26) and the upper side of the second circuit board part is arranged on the lower side of the ferrite core (26).

6. Model car (10) according to claim 1 or 2, characterized in that the other coil portions form at least three to eight coil windings.

7. Model car (10) according to claim 1 or 2, characterized in that the helical vector (S) of the coil assembly (22) lies substantially in the plane of the base plate (12).

8. Model car (10) according to claim 1 or 2, characterized in that the base plate (12) has a first direction of extension (I) extending between the first coil portion (28a) and the second coil portion (28b), a second direction of extension (II) extending at right angles to the first direction of extension (I), and a third direction of extension (III) extending at right angles to the first direction of extension (I) and to the second direction of extension (II), wherein the helical vector (S) of the coil assembly (22) extends substantially in the direction of the second direction of extension (II) and/or the third direction of extension (III).

9. Model car (10) according to claim 6, characterized in that said other coil portions form five coil windings.