Description

Field of the invention

The present invention relates to a bobbin winder. The present invention is more specifically to a bobbin winder, which is configured to be part of an electrical circuit.

Background of the invention

Since the discovery of the electromagnetism basic legal contexts, the electricity has been used to generate magnetic fields in many different contexts. A typical electromagnet is constructed as a ring or a cylinder formed around a core of a magnetic or magnetisable material. To achieve large field strengths, it is usual to wrap many layers of wire around the core.

It is known simultaneously to generate several opposing or rectified magnetic fields in order to create areas with respectively strong fields and areas where the magnetic field is repealed because of a superposition of opposing fields.

However, it is desirable to provide and control a rectified magnetic field around a defined and identified area. It is also desirable to provide such a magnetic field with simple and commercial available components.

Purpose of the invention

The present inventions purpose is to specify a bobbin winder, which makes it possible to generate several rectified magnetic fields around a defined and identified area. It is furthermore the present inventions purpose to provide a bobbin winder that contains simple and commercial available components.

The purpose of the present invention is achieved with a bobbin winder as defined in claim 1. The preferred performance forms are defined in the sub claims and explained in the following description and illustrated in the associated figures.

The bobbin winder includes, in according to the invention:

- A primary coil with a centrally located coil core and one or more layers of windings around the coil core.

- A number of secondary of coils placed around the primary coil, each one with a centrally located coil core and one or more layers of windings around the coil core.

The bobbin winder includes eight secondary coils symmetrically placed around the primary coil. The secondary coils are electrically connected in pairs two by two thus generating rectified magnetic fields, when a current run through the secondary coils.

Here by creating a bobbin winder which allows the generation of several rectified magnetic fields around a defined and identified area.

The bobbin winder can furthermore be constructed from simple commercial available components.

It is preferred, that the primary coil is larger than the surrounding secondary coils. With the expression "centrally located coil core and one or more layers of windings around the coil core" - means, that the coil includes a central coil core around which there are provided windings.

It is for example possible to wind electric conductive but electric insulated wire directly around the coil core. It is preferred that the eight secondary coils are identically build and equally divided around the primary coil.

It is also preferred; that the eight secondary coils are dimensioned thus they are in plan with the adjacent neighbour coils as well as the primary coil. The secondary coils are pair wise electrically connected two by two with for example electric cables. The coupling between the pair wise electrical related secondary coils are provided in a way, so that all the secondary coils generates rectified magnetic fields, when a current run through the secondary coils. It is preferred that the eight secondary coils have the same winding direction.

It is particularly preferred that the eight secondary coils are left turned.

It can be advantageously that the eight secondary coils and the primary coil are cylindrical with a circular cross section and that the centrally placed coil cores are cylindrical and the windings are concentric and/or symmetrically placed relative to the coil cores.

Hereby is it possible to use commercial available components that are easy to produce and they are even strong and sturdy.

It is preferred that the windings are wound directly around the coil cores on both the secondary coils and on the primary coil. Hereby achieving an extremely robust and easy produced coil construction.

It is preferred that the bobbin winder includes an electric power source hereby ensuring that there can be generated magnetic fields in and around the coils.

It is advantageously that the bobbin winder includes or is configured to be connected to a control unit for regulating a current (voltage and current strength) to the coils. It can be an advantage if the electrical power source is an accumulator. An accumulator can store electrical energy which is perhaps generated by using a rotor device according to the present invention. The accumulator can also secure an electric supply source to the rotor device.

It is preferred that the bobbin winder includes a first converter configured to convert direct current (DC) to alternating current (AC) and/or to convert AC to DC. Hereby achieving a possibility to connect the bobbin winder to another electrical circuit (for example in connection to generation of electrical energy, required in an AC form).

It is advantageously that the converter is electrical connected to two side- by-side secondary coils. This is for instance appropriate concerning space considerations.

It is preferred that the bobbin winder includes a second converter configured to convert DC to AC and/or AC to DC. Hereby achieving a possibility to connect the bobbin winder to another electrical circuit.

It is preferred that the second converter is electrical connected to two side- by-side secondary coils.

It is preferred that the bobbin winder includes a first secondary coil, where the outer layer of the windings are electronic connected to the outer layer of windings of another secondary coil, whose inner layer of windings are electronic connected to the inner layer of windings on a third secondary coil, whose outer layer of windings are electrical connected to the outer layer of windings on a fourth secondary coil, whose inner layer of windings are electronic connected to the outer layer on a fifth secondary coil, whose inner layer of windings are electronic connected to the outer layer of a sixth secondary coil, whose inner layer of windings are electronic connected to the outer layer of windings on a seventh secondary coil, whose inner layer of windings are electronic connected to the outer layer of windings on an eight secondary coil, whose outer layer of windings are connected to the accumulator.

Hereby achieving a simple, reliably and dependable rotor device, which is capable of generating the wished magnetic fields.

It is preferred that the outer layer of windings on the third secondary coil are electronic connected to a first converter, which furthermore is electronic connected to the outer layer of windings on the fourth secondary coil.

Furthermore is it preferred that the inner layer of windings on the fifth secondary coil is electronic connected to a second converter which furthermore is electronic connected to the outer layer of windings on the sixth secondary coil.

It is advantageous that the bobbin winder includes an accumulator with an anode, which is electronic connected to the inner layer of windings on the first secondary coil and that the bobbin winder includes a cathode, which is electronic connected to the inner layer of windings on the eight primary coil. Hereby making it possible to use an accumulator (a battery) as energy supply to the rotor device.

Description of the figures

The invention will in the following be explained in regard to the supplied drawing, where;

Fig. 1 shows two schematic illustrations of a first apparatus

according to the invention.

Fig. 2 shows a schematic illustration of the apparatus shown in Fig. 1

- seen in perspective. Fig. 3 shows a schematic illustration of another apparatus according to the invention.

Fig. 4 shows a schematic illustration of a third apparatus according to the invention.

Fig. 5 shows a schematic illustration of a fourth apparatus according to the invention.

Fig. 6 shows two cross-sectional views of a coil used in an apparatus according to the invention.

Detailed description

First it should be noted, that the attached drawing only illustrates non- restricted performance forms. Another line of performance forms will be possible within the range of the present invention. In the following will similarly or identical elements in the different performance forms be described with the same reference name.

Fig. 1 a) is a schematic illustration of a bobbin winder 30 according to the invention, seen from the side while Fig. 1 b) shows the bobbin winder 30 viewed from above. The bobbin winder 30 includes a primary coil 14, which is surrounded by eight smaller secondary coils 1 , 2, 3, 4, 5, 6, 7, 8. The primary coil 14 includes a centrally located cylindrical magnetic coil core 16, which for example can be made of ferrite. The magnetic coil core 16 is extending along the primary coils longitudinal axis X and the magnetic coil core 16 is in this way placed concentrically in proportion to the primary coil

14.

The length l_2 of the primary coil 14 is bigger than the length Li of the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8. The magnetic coil core 16 is longer than the primary coil 14 and the magnetic coil core 16 is therefore jutting out (in both ends). Around the magnetic coil core 16 there is provided an area with windings. The windings can for example by thin isolated copper wire. The wire diameter can be dimensioned from the expected operating conditions (the greater the current strength, the thicker the wire would be appropriate to use, to reduce the electric resistance and thus the heat development).

The secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 are arranged symmetrically around the primary coil 14. The secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 are in this way arranged along the periphery of the primary coil. Each of the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 includes a magnetic coil core 10 with a cylindrical structure. The length of coil core 10 exceeds the length of Li of the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 and the coil cores 10 is then jutting out of the coils ends. The coil cores 10 are arranged concentrically in proportion to the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8, who has parallel longitudinal axis Yi, Y2, Y3, Y4, Y5, Ye, Y7, Ye that, moreover, runs parallel along with the primary coils longitudinal axis X.

The primary coil has a diameter D2 that is larger than the secondary coils diameter Di. The secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 have the same geometry and size and is even placed paralleled, so that their end plates lies in the same plane.

Fig. 2 shows a schematic illustration of the bobbin winder 30 illustrated in Fig. 1. The bobbin winder 30 is shown in perspective and it emerges from Fig. 2 that the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 are placed symmetrically around the primary coil 14. The primary coil coils core16 is oriented with the magnetic north pole upward and the magnetic south pole dawn wards.

Fig. 3 shows a bobbin winder 30 according to the present invention. The bobbin winder 30 is seen from above and includes a primary coil 14 corresponding to the one depicted in Fig. 1-2. Eight secondary coils 1 , 2, 3, 4, 5, 6, 7, 8 are located symmetrically around the primary coil 14 in the same way as illustrated in Fig. 1-2.

Each one of the secondary coils 1, 2, 3, 4, 5, 6, 7, 8 consists of a magnetic coil core 10, around which is wound insulated cobber wire 12. On Fig. 3 this is schematically illustrated. In practice there will be around 5-20 layers of windings throughout the coils length (where there may be room for example 50-100 wires next to each other). Thus there can for example be 10 layers of 80 windings corresponding to 800 windings on one of the secondary coils 1 , 2, 3, 4, 5, 6, 7, 8. The primary coil 14 does also have a magnetic coil core 16, around which is wound insulated copper wire (the windings is however not shown in Fig. 3).

The bobbin winder 30 includes a power source in the form of an

accumulator 18 (for example a 12 volts battery for a car) there has an anode 20 and a cathode 22. The anode 20 is electrically connected to the first secondary coil 1 with an electrical cable 28, there is connected to the inner winding in the first secondary coil 1.

All the windings are left turned and the current runs thus from accumulator 18 via the electrical cable 28 to the inner winding in the first secondary coil 1 , from which it is gradually running down along the inner layer of windings. Then the current runs gradually on to the next inner layer and so on until the current runs through the outermost layer, from which the current passes on to coil 2 via the electrical cable 32.

The electrical cable 32 is connected to the outer winding in coil 2, from which the current is led left wise towards the innermost windings. An electrical cable 34 connects the innermost windings in coil 2 with the innermost windings in core 3. The current is then routed from the inner windings in coil 2 to the inner windings in coil 3 and from here leftwards out towards the outer windings in coil 3. The outer windings in coil 3 are connected to a converter 24 via an electrical cable 36. The converter 24 is also connected to the outer windings in coil 4 via an electrical cable 38.

The converter 24 converts the current from direct current (DC) (from the accumulator) to alternating current (AC) and it would therefore be possible to tap current from the converter from a single-phase electrical drainage area with zero and phase (not shown).

From an electrical cable 38 the current is lead on to the outer windings in coil 4, from where the current runs left on towards the inner windings in coil 4. From the inner windings in coil 4 the current is lead on to the outer windings in coil 5 via an electrical cable 40.

From the outer windings in coil 5 the current is lead left on towards the inner windings in coil 5, from where the current is lead on to another converter 26 via an electrical cable 42. In the converter 26 the current is converted from alternating current (AC) to direct current (DC) that is lead on to the outer windings in coil 6 via the electrical cable 44. From the outer windings in coil 6, the current is lead left on towards the inner windings in coil 6, from where the current is lead on to the outer windings in coil 7 via an electrical cable 46. From the outer windings in coil 7, the current is lead left on towards the inner windings in coil 7, from where the current via an electrical cable 48 is lead on to the outer windings in coil 8. From the outer windings in coil 8, the current is lead left on towards the inner windings in coil 8, from where the current is lead on back to the accumulator's cathode 22 via an electrical cable 50. By using the right hand rule it shows, that the magnetic field changes direction from one coil to the next. Thus producing a rectified magnetic field around the primary coil 16.

Fig. 4 illustrates a further performance form for a bobbin winder 30 according to the invention. The bobbin winder 30 is almost identical with the bobbin winder shown in Fig. 3. The only difference is however, that the second converter 26 is removed and that the two electrical cables 42 and 44 are connected.

Fig. 5 shows another bobbin winder 30 according to the invention. The bobbin winder 30 is almost equivalent to the bobbin winder shown in Fig. 4. The first converter 24 is however removed and the two electrical cables 36 and 38 are connected to each other.

Fig. 6 shows the construction of one of the secondary coils, coil 2. Fig. B b) shows a cross-sectional view of coil 2. The coil 2 includes a cylindrical magnetic coil core 10, that are placed symmetrically and concentrically in relation to a collection of windings 12, which is wound around the central areas of coil core 10. The magnetic coil core 10 is hereby including a distal peripheral area and a proximal peripheral area without windings 12.

There are placed a ring-shaped end plate 52 in each of the coils two ends. The end plate 52 can for example be made in electrical non-conductive material like wood, bakelite or plastic.

An electrical cable 32 is connected to the top winding in the outermost layer of windings 12 on coil 12. Another electrical cable 34 is connected to the lower winding in the inner layer of windings 12. The cables 32 and 34 can be seen in Fig. 3, Fig. 4 and Fig. 5.

Coil 2 includes Ni layer of N2 windings wound along coil core 10. In Fig. 6 the coil 2 comprises of 10 layers of 80 windings, i.e.: (1) N1 = 10 and

(2) N2 = 80

The total number of windings is then 800.

Fig. 6 a) shows a close-up at the lower left part of coil 2 shown in Fig. 6 b). It shows that the coil 2 includes 10 layers of windings 12 (i.e. Ni = 10) and that an electrical cable 24 is connected to the lower winding in the innermost layer of windings 2. The windings 2 are thin cupper wire with an outer electrical insulating layer.

The primary coil 14 (see Fig. 1-5) does also include a magnetic core 14 and surrounding windings 12.

Referral numbers

1 , 2, 3, 4 Coil (secondary coil)

5, 6, 7, 8 Coil (secondary coil)

10 Magnetic coil core

12 Windings

14 Coil (primary coil)

16 Magnetic coil core

18 Power source (accumulator)

20 Anode

22 Cathode

24 Converter

26 Converter

28 Electrical cable

30 Bobbin winder

X Longitudinal axis

Y1 , Y2, Y3, Y4 - Longitudinal axis

Y5, Y6, Y7, Y8 - Longitudinal axis

L1. L2 Length

Di, D2 Diameter

Ni, N2 Numbers

N Magnetic north pole , 34, 36, 40, 42, 46, 48, 50 , 54