3-phase electrical connection system

Abstract

The present invention relates to a three-phase electrical connection system, the system comprising a socket (S), an electrical plug (F), and a magnetic indexing device (1) having two parts, a first magnet part (2) fixed to the socket (S), and a second magnet part (3) integrated with the electrical plug (F), the first magnet part (2) and the second magnet part (3) of the magnetic indexing device each comprising a yoke (20, 30) and a first set of three identical permanent magnets (201_1, 201_2, 201_3, 301_1, 301_2, 301_3) each fixed to a respective annular part of the yoke, the three permanent magnets being spaced apart from each other by a first constant non-zero angular interval (I1), all of which have the same magnetic direction parallel to the rotation axis, and the permanent magnets of the first magnet part being attracted to the permanent magnets of the second magnet part by a magnetic force.

Description

[Technical field]

[0001] The present invention relates to a three-phase electrical connection system that allows two components to be mechanically connected using magnetic means.

[0002] As is well known, a triohasee, three-phase electrical connection system typically includes an electrical socket and a plug configured to be mechanically and electrically connected to the socket.

[0003] In a three-phase system, the plug and socket each include three electrical phase terminals, an earth terminal and often an electrical neutral terminal.

[0004] The three electrical phase terminals are arranged in a delta configuration and the earth terminal is arranged to form a square with the other three terminals, with the electrical neutral terminal located at the centre of the square thus formed. Conventional solutions require the user to position the plug relative to the socket so that the two components can be mechanically connected to form an electrical connection.

[0005] In the prior art, connection means utilizing the magnetic effect have already been proposed, which use magnetic force to attract a plug to a socket, mechanically connect the plug and the socket, and electrically connect the electrical terminals of the plug and the electrical terminals of the socket. Summary of the Invention [Problem to be solved by the invention]

[0006] These known magnetic means are suitable for single-phase systems and usually allow the plug to be connected to the socket regardless of the orientation of the plug relative to the socket (360° connection). Such solutions are described in particular in patent applications WO2012 / 032230A1, EP2667459A1, FR3012263A1 and WO2017 / 001755A1. They cannot be adapted to three-phase systems, in particular for size reasons.

[0007] Other electrical connection means using magnetic effects are also described in patent applications FR3072216A1, US2011 / 171837A1 and US2019 / 009680A1, which aim to provide only a single angular connection position and for this purpose integrate mechanical yoke means.

[0008] The present invention provides a three-phase electrical connection system that includes magnetic means designed to mechanically reliably connect the plug to the socket in a number of different angular positions, aiming to provide a reliable electrical connection between the electrical plug and the socket without user intervention. The solution of the present invention is advantageous because it operates exclusively by magnetic means, i.e. it limits the use of specific mechanical po-yoke components as proposed in the prior art. [Means for solving the problem]

[0009] This object is achieved by a three-phase electrical connection system, comprising a socket, an electric plug, and a magnetic indexing device having two parts, a first magnet part fixed to the socket and a second magnet part integrated in the plug, the first magnet part and the second magnet part of the magnetic indexing device each having: A ring-shaped yoke made of ferromagnetic material, the ring-shaped yoke having an axis of rotation and at least one rotational support surface (200, 300) formed in a plane transverse to the axis of rotation, the rotational support surface being divided into three identical individual ring-shaped parts each having an angular subtense of 120°; a first set of three identical permanent magnets, each fixed to a respective annular portion of the yoke; the three permanent magnets are spaced apart from one another by a first constant non-zero angle; All of these permanent magnets have the same magnetic orientation parallel to the axis of rotation, The permanent magnet of the first magnet section is attracted to the permanent magnet of the second magnet section by a magnetic force.

[0010] None of the prior art documents propose a solution aimed at allowing several different angular positions in the electrical connection system. Their aim is to limit the number of positions to ensure an electrical connection between the corresponding terminals of the socket and the plug. In the present invention, all permanent magnets are the same and have the same orientation, allowing typically three angular connection positions 120° apart.

[0011] According to one particular feature, the first magnet part of the magnetic indexing device comprises: a second set of three other identical permanent magnets secured to respective annular portions of the support surface of the yoke; In the yoke, the three permanent magnets of the second set are disposed between the two permanent magnets of the first set and are spaced apart from each other by the same second angular interval; The second set of permanent magnets has an opposite magnetic orientation to the first set of permanent magnets.

[0012] According to another particular feature, the second magnet portion of the magnetic indexing device also comprises: a second set of three other identical permanent magnets, each fixed to a separate annular portion of the support surface of the yoke; In the yoke, the three permanent magnets of the second set are disposed between and spaced apart from the two permanent magnets of the first set; The second set of permanent magnets has an opposite magnetic orientation to the first set of permanent magnets.

[0013] According to one particular feature, each permanent magnet of the magnetic indexing device has the shape of a ring portion.

[0014] According to one particular embodiment, each permanent magnet of the first set is formed with a ring portion extending over an angle range selected to be greater than or equal to 40° and strictly less than 120°.

[0015] According to another particular embodiment, each permanent magnet of the first set is characterized in that it is formed of a ring portion extending over an angular range selected from the range 55° to 100°.

[0016] According to another particular embodiment, each permanent magnet of the first set is formed with a ring portion extending over an angular range selected from the range of 70° to 90°.

[0017] According to one particular feature of the invention, the plug and the socket are provided with separate electrical connection parts, These electrical connection parts are respectively arranged in the plug and the socket so as to connect with each other in three distinct angular positions of the plug relative to the socket; These three angular positions are 120° apart from each other.

[0018] According to one particular feature, the plug comprises three first electrical phase terminals forming an equilateral triangle.

[0019] According to another particular feature, the plug includes an electrical ground terminal located in the center of said equilateral triangle.

[0020] According to another particular feature, the plug includes an electrically neutral terminal.

[0021] According to another particular feature, the socket comprises three electrical phase terminals, The three electrical phase terminals, which form the same equilateral triangle as the plug, are arranged so that the plug can be connected to the socket in three angular positions spaced 120° apart from one another.

[0022] According to another particular feature, the socket includes a triple neutral terminal, the neutral terminals being arranged so that the plug can be connected to the socket in three angular positions spaced 120° apart from one another.

[0023] According to another particular feature, the plug has at least one electrical data transfer terminal and the socket comprises triple data transfer terminals, the data transfer terminals being respectively arranged such that the plug can be connected to the socket in three angular positions spaced 120° from one another. [Brief description of the drawings]

[0024] Other features and advantages will become apparent from the following detailed description taken in conjunction with the figures listed below. [Figure 1] 1 is a side view showing a schematic diagram of the basic principle of an electrical connection system according to the invention; [Diagram 2] 1A and 1B are front views showing a socket and a plug used in the system of the present invention. [Figure 3A] FIG. 2 is a front view of the magnetic yoke of the two permanent magnets of the system of the present invention. [Figure 3B] FIG. 2 is a front view of the magnetic yoke of the two permanent magnets of the system of the present invention. [Figure 4A] 1 shows a first modified configuration of a magnetic indexing device used in a system of the present invention. [Figure 4B] 1 shows a first modified configuration of a magnetic indexing device used in a system of the present invention. [Figure 4C] 1 shows a first modified configuration of a magnetic indexing device used in a system of the present invention. [Figure 5A] 13 shows a second configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 5B] 13 shows a second configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 5C] 13 shows a second configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 6A] 13 shows a third configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 6B] 13 shows a third configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 6C] 13 shows a third configuration modification of the magnetic indexing device used in the system of the present invention. [Figure 7] 1 is a graph illustrating the dimensional characteristics of the system of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The three-phase electrical connection system of the present invention includes an electrical plug F configured to be connected to an electrical device APP and an electrical socket S configured to be connected to a power source ALIM, and the electrical plug F is electrically connected to the electrical socket S. Normally, the electrical socket S is fixed, and the electrical plug F moves toward the electrical socket S to enable connection.

[0026] The electrical socket S and the electrical plug F advantageously have a cylindrical housing.

[0027] The system of the invention also includes a magnetic indexing device 1 having two magnet parts 2, 3, referred to as a first magnet part 2 and a second magnet part 3. The first magnet part 2 is fixed to an electric socket S, and the second magnet part 3 is integrated with an electric plug F. In the following, it will be shown that the magnetic structure of the magnetic indexing device is hexapolaire (hexapolar). The two parts are housed in separate housings in the electric socket S and the electric plug F, respectively.

[0028] The inventive solution uses two permanent magnets to ensure at least a mechanical connection of the electric plug F to the electric socket S. The electrical connection of the terminals of the electric plug F to the terminals of the electric socket S may be made simultaneously with the mechanical connection or may be made after the mechanical connection. In other words, the inventive solution at least allows the plug to assume a stable mechanical position relative to the socket, so that the plug is electrically connected to the socket and complies with the electrical connection conventions of a three-phase electric system.

[0029] The magnetic indexing device of the present invention is configured to allow electrical plug F to be positioned in electrical socket S in three different angular positions, each 120° apart.

[0030] The electrical connection means are for that part suitable for ensuring an electrical connection between an electrical terminal of the electrical plug F and an electrical terminal of the socket in any (one of three) of three angular positions adopted by the electrical plug F relative to the electrical socket S.

[0031] As shown in FIG. 2, some electrical terminals present on electrical socket S are tripled to allow electrical plug F to be positioned in three different positions spaced 120° apart.

[0032] For example, but not limited to, the electrical plug F may include: Three electrical phase terminals L1, L2, and L3 located at the three vertices of an equilateral triangle; a single electrical earth terminal PE located at the centre of said equilateral triangle; A single electrical neutral terminal N; In some cases, there are two data transfer terminals PP and CP. The electrical socket S side has three electric phase terminals L1', L2', and L3' located at three vertices of an equilateral triangle that is the same as the equilateral triangle of the electric plug F so that the electric plug F can be connected at three angular positions spaced 120° apart; a single electrical earth terminal PE' located at the centre of the triangle formed by the three electrical phase terminals; three electrical neutral terminals N1', N2', N3' forming a second equilateral triangle, the three electrical neutral terminals being respectively positioned such that the electrical neutral terminal of the plug F may be connected to the electrical socket S in each of three angular orientations of the plug; There are three types of data transfer terminals (CP1', CP2', CP3' and PP1', PP2', PP3'), and the two types of data transfer terminals are appropriately positioned so that the two types of data transfer terminals of the electric plug F can be connected to the electric socket S in each of the three angular orientations of the electric plug F.

[0033] Of course, other configurations are possible, such as a centrally located neutral terminal and a duplicate earth terminal on the socket side.

[0034] In order to avoid connection between the electric neutral terminal and the electric phase terminal, it is advantageous to appropriately shift the electric neutral terminal from the electric phase terminal to form a natural poka-yoke mechanism.

[0035] For example, the electrical terminals used in plugs and sockets may be pinch terminals or flat contacts.

[0036] The two magnet portions 2 and 3 of the magnetic indexing device are configured to be attracted to each other by the magnetic attraction effect via, for example, a plastic housing.

[0037] The two magnet parts 2, 3 each comprise a yoke 20, 30 (hereafter magnetic yoke) preferably made of a ferromagnetic material. The two yokes 20, 30 are advantageously of the same shape and composition (same material). Each magnetic yoke 20, 30 is advantageously made in the shape of a ring and is rectangular in cross section. The ring is therefore advantageously flat, so that it has two opposing transverse annular faces around its axis of rotation (X), which is parallel to the direction in which the electric plug F approaches and connects to the electric socket S. At least one of the two faces is flat and is configured to support a permanent magnet. This face is called the support face 200, 300 of the respective yoke 20, 30. 3A and 3B, the support surface 200, 300 is divided into three adjacent identical annular portions (200_1, 200_2, 200_3 and 300_1, 300_2, 300_3) each of which extends over an angular range of 120° and occupies the entire circumference of the yoke. The three annular portions are referred to as the first annular portion, the second annular portion and the third annular portion for each yoke.

[0038] For example, the thickness of the yokes 20, 30 may be from 2 mm to 8 mm.

[0039] Similarly, the yokes 20, 30 may have an inner diameter D1 between 40mm and 120mm and an outer diameter D2 between 50mm and 140mm.

[0040] This allows us to distinguish between various magnetic configurations: the first one is a minimal configuration, the subsequent ones are successive improvements.

[0041] First Configuration - Figures 4A to 4C In this configuration, each yoke 20, 30 includes a first set of three identical permanent magnets 201_1, 201_2, 201_3, 301_1, 301_2, 301_3.

[0042] Advantageously, the permanent magnets associated with the first magnet section and the permanent magnets associated with the second magnet section are of the same shape and composition.

[0043] For each magnet portion 2, 3, the first permanent magnet 201_1, 301_1 is fixed to the first annular portion 200_1, 300_1 of the support surface, the second permanent magnet 201_2, 301_2 is fixed to the second annular portion 200_2, 300_2 of the support surface, and the third permanent magnet 201_3, 301_3 is fixed to the third annular portion 200_3, 300_3 of the support surface.

[0044] In each yoke, a permanent magnet is fixed to its support surface with its magnetic direction (by North-South convention) parallel to the axis of rotation (X) of the yoke. The permanent magnets of the first magnet section and the permanent magnets of the second magnet section are oriented so as to be attracted by magnetic forces. They therefore have pole faces in contact with the support surface. In all configurations described, each permanent magnet is fixed by contacting one of its two pole faces (in its magnetic direction) with the support surface of the magnetic yoke with which it is integrated. In the attached figures, by convention, the magnetic direction of the permanent magnets is represented by a North-South arrow.

[0045] Each permanent magnet can be in the shape of a ring having the same radius of curvature as the yoke, and can have a shape and a radial dimension that is constant over its entire angular range and is the same as the radial dimension of the yoke.

[0046] In each yoke 20, 30, the permanent magnets are separated from each other by a constant, non-zero spacing I1, I2 (the permanent magnets are not touching). The angular spacing is defined by the angular extent about the axis of rotation (X) and is the same for the two permanent magnets.

[0047] In this first configuration, each permanent magnet can extend over a predefined angular extent of the annular section. In each yoke, the permanent magnets can be formed with an angular extent of more than 40° and strictly less than 120°, since they are not in contact with each other, and have a non-zero angular spacing with each adjacent permanent magnet. The permanent magnets must be sufficiently long to ensure accurate magnetic alignment between the two magnet sections 2, 3.

[0048] For example, but not by way of limitation, the following different embodiments can be distinguished: In the two yokes 20, 30, the permanent magnets each extend in their annular portions the same angular range AP of 100° (FIG. 4A). In the two yokes, the permanent magnets each extend in their annular portions the same angular range AP of 80° (FIG. 4B). In the two yokes, the permanent magnets each extend in their annular portions the same angular range AP of 55° (FIG. 4C).

[0049] In this configuration, for each permanent magnet, the angular spacing I1, I2 between the two permanent magnets depends, of course, on the size of the permanent magnet.

[0050] Second Configuration - Figures 5A to 5C Compared with the first configuration, this second configuration adds a second set of three identical permanent magnets 202_1, 202_2, 202_3 only to the first magnet section 2 of the magnetic indexing device. The second magnet section 3 is the same as that described in the first configuration above.

[0051] These three permanent magnets 202_1, 202_2, 202_3 are fixed to respective annular portions 200_1, 200_2, 200_3 of the yoke in the same plane as the first set of three permanent magnets.

[0052] Each of the three new permanent magnets is disposed between two permanent magnets of the first set, such that there is a constant, non-zero angular separation between the two permanent magnets of the first set.

[0053] Each permanent magnet of this second set is formed in the shape of a ring portion having the same radius of curvature as the yoke, and its shape and radial dimension can be matched, and the radial dimension is constant over its entire angular range and is the same as the radial dimension of the yoke.

[0054] These three permanent magnets are fixed to the support surface so as to have the same magnetic direction, which is parallel to the axis of rotation (X) and opposite to the magnetic direction of the first set of permanent magnets.

[0055] Advantageously, they have the same thickness (defined in the axial direction) as the thickness of the first set of permanent magnets of the first magnet portion.

[0056] These extend over an angular range which is less than or equal to the angular range of the first set of permanent magnets of the first magnet section, the assembly formed by the first set of permanent magnets, and the second set of permanent magnets, the two non-zero angular intervals being 120°.

[0057] For example, the following different embodiments can be distinguished: In the first magnet section, the first set of permanent magnets 201_1, 201_2, 201_3 each extend an angular range AP1 of 100° in its annular section, and the second set of permanent magnets 202_1, 202_2, 202_3 each extend an angular range AP2 of 10° (FIG. 5A). Thus, the constant angular interval I1 between two adjacent permanent magnets is close to 5°. The second magnet section 3 only has the first set of three permanent magnets 301_1, 301_2, 301_3, which are the same as the first set of permanent magnets in the first magnet section 2. Each of the first set of permanent magnets 201_1, 201_2, 201_3 extends an angular range AP1 of 80° in its annular portion, and the second set of permanent magnets 202_1, 202_2, 202_3 extends an angular range AP2 of 30° (FIG. 5B). Thus, the constant angular interval I1 between two adjacent permanent magnets is close to 5°. The second magnet section 3 has only the first set of three permanent magnets 301_1, 301_2, 301_3, which are the same as the first set of permanent magnets of the first magnet section 2. The first set of permanent magnets 201_1, 201_2, 201_3 extend an angular range AP1 of 55° in the annular portion, and the second set of permanent magnets 202_1, 202_2, 202_3 extend an angular range AP2 of 55° (FIG. 5C). Thus, the constant angular interval I1 between two adjacent permanent magnets is close to 5°. The second magnet section 3 has only the first set of three permanent magnets 301_1, 301_2, 301_3, which are the same as the first set of permanent magnets of the first magnet section 2.

[0058] In each embodiment, the permanent magnets of the second magnet section are selected to have the same angular range as the permanent magnets of the first magnet section.

[0059] As a variation of this second configuration, it is of course possible to reverse the two magnetic structures, and the second set of three permanent magnets would then be fixed to the second magnet section 3 and positioned between the permanent magnets of the first set of the second magnet section 3, while the first magnet section would remain configured with a single first set of three permanent magnets.

[0060] Third Configuration - Figures 6A-6C Compared to the second configuration, this third configuration adds a second set of three identical permanent magnets 302_1, 302_2, 302_3 to the second magnet section 3 of the magnetic indexing device. The first magnet section is the same as that described above for the second configuration.

[0061] As with the second configuration, these three additional permanent magnets are each fixed to a separate annular portion of the yoke 30 of the second magnet portion 3 on the same face as the first set of three permanent magnets.

[0062] Each of the three new permanent magnets is disposed between two permanent magnets of the first set, and there is a constant non-zero angular spacing I2 between the two permanent magnets of the first set.

[0063] Each permanent magnet 302_1, 302_2, 302_3 of this second set can be shaped as a ring having the same radius of curvature as the yoke, and can have a shape and a radial dimension that is constant over its entire angular range and is the same radial dimension as the yoke.

[0064] All three permanent magnets are fixed to their support surface and exhibit the same magnetic direction, which is parallel to the axis of rotation and opposite to the magnetic direction of the first set of permanent magnets of the second magnet section 3.

[0065] Advantageously, they have the same thickness (defined in the axial direction) as the thickness of the first set of permanent magnets of the second magnet part 3 .

[0066] These extend over an angular range less than or equal to the angular range of the first set of permanent magnets of the second magnet portion.

[0067] For example, taking into consideration that the first magnet part 2 remains in the second configuration described above, the following various embodiments can be distinguished: The first set of permanent magnets 301_1, 301_2, 301_3 extend an angular range AP1 of 100° in the annular portion, and the second set of permanent magnets 302_1, 302_2, 302_3 extend an angular range AP2 of 10° (FIG. 6A). Thus, the constant angular interval I2 between two adjacent permanent magnets is close to 5°. The first magnet section 2 is of the same configuration with the permanent magnets oriented to attract the permanent magnets of the second magnet section 3. The first set of permanent magnets 301_1, 301_2, 301_3 extend an angular range AP1 of 80° in the annular portion, and the second set of permanent magnets 302_1, 302_2, 302_3 extend an angular range AP2 of 30° (FIG. 6B). Thus, the constant angular spacing between two adjacent permanent magnets is close to 5°. The first magnet section 2 is of the same configuration with the permanent magnets oriented to attract the permanent magnets of the second magnet section 3. The first set of permanent magnets 301_1, 301_2, 301_3 extend an angular range AP1 of 55° in the annular portion, and the second set of permanent magnets 302_1, 302_2, 302_3 extend an angular range AP2 of 55° (FIG. 6C). Thus, the constant angular spacing between two adjacent permanent magnets is close to 5°. The first magnet section 2 is of the same configuration with the permanent magnets oriented to attract the permanent magnets of the second magnet section 3.

[0068] Regardless of the above-mentioned embodiment and configuration, the first set of permanent magnets 201_1, 201_2, 201_3 of the first magnet section 2 and the first set of permanent magnets 301_1, 301_2, 301_3 of the second magnet section 3 are always selected in the same angular range, and the second set of permanent magnets 202_1, 202_2, 202_3 (if they exist) of the first magnet section 2 and the second set of permanent magnets 302_1, 302_2, 302_3 (if they exist) of the second magnet section 3 are always selected in the same angular range. Similarly, regardless of the above-mentioned embodiment and configuration, the angular intervals I1, I2 between two adjacent permanent magnets are not zero, but are constant and selected to be the same. For example, the angular intervals I1, I2 are selected between 2° and 10°, and of course, are suitable for the size of the selected permanent magnets.

[0069] For example, all the permanent magnets may have a thickness between 2mm and 10mm.

[0070] 7 is a graph showing the angular stiffness (raideur angulaire, angular stiffness) that the first magnet part 2 provides to the second magnet part 3 for various sizes of permanent magnets (angular range AP) of the first set when the system is in the first configuration described above, i.e. with three permanent magnets, a single set for each yoke 20, 30. The dimensional configuration is as follows:

[0071] AG (= air gap, i.e. distance between two permanent magnets) = 2mm, HY (= thickness of yoke, axial dimension) = 4mm, HM (= thickness of permanent magnet, axial dimension) = 6mm, TH (= width of permanent magnet and yoke, radial dimension) = 8mm, AP (= angular range of each permanent magnet) = 55°~100°.

[0072] It can thus be seen that, regardless of the angular position about the axis of the plug relative to the socket, the angular stiffness (about the longitudinal axis) is always highest for the large permanent magnet.

[0073] The described solution therefore has many advantages, including: The realization of a six-pole magnetic structure allows mechanical connection by magnetic effects at three angular positions spaced 120° apart from one another. It facilitates electrical connection between the plug and the electrical socket and provides reliable connection in multiple positions without user intervention. It is easy to manufacture. The use of an annular yoke makes it possible to eliminate the need for axial internal space for electrical connections, resulting in a compact design.

[0074] The system of the invention is particularly perfectly suited for use in electrical installations for recharging electric vehicles, such as those described in patent application WO2017 / 216458A1, which have the feature that the plug can be connected to the electrical socket without user intervention, by guiding the plug to the socket using the magnetic effect.

Claims

1. 1. A three-phase electrical connection system comprising: The magnetic indexing device (1) comprises a socket (S), an electric plug (F), and a first magnet portion (2) fixed to the socket (S) and a second magnet portion (3) integrated with the electric plug (F), The first magnet unit (2) and the second magnet unit (3) of the magnetic indexing device each include an annular yoke (20, 30) made of ferromagnetic material, having an axis of rotation (X) and at least one rotational support surface (200, 300) formed in a plane transverse to said axis of rotation, said rotational support surface being divided into three identical individual annular parts each having an angular subtense of 120°; a first set of three identical permanent magnets (201_1, 201_2, 201_3, 301_1, 301_2, 301_3), each fixed to one of the individual portions of the yoke; Equipped with the three permanent magnets are spaced apart from one another by a first constant non-zero angular interval (I1); all of the permanent magnets have the same magnetic direction parallel to the axis of rotation, and the permanent magnets of the first magnet section are attracted to the permanent magnets of the second magnet section by a magnetic force; the electrical plug is electrically connected to the socket when the electrical plug is in any one of a first angular position, a second angular position, and a third angular position with respect to the socket; the first angular position, the second angular position, and the third angular position are 120° apart from one another. 3-phase electrical connection system.

2. The first magnet portion (2) of the magnetic indexing device is a second set of three other identical permanent magnets (202_1, 202_2, 202_3), each fixed to a respective portion of the rotational support surface of the yoke; In the yoke (20), the three permanent magnets of the second set are disposed between two permanent magnets of the first set and spaced apart from each of them by the same second angular distance; 2. The three phase electrical connection system of claim 1, wherein said permanent magnets of said second set have an opposite magnetic orientation as said permanent magnets of said first set.

3. The second magnet portion (3) of the magnetic indexing device is a second set of three other identical permanent magnets (302_1, 302_2, 302_3), each fixed to a respective portion of the rotational support surface of the yoke; In the yoke (30), the three permanent magnets of the second set are disposed between and spaced apart from the two permanent magnets of the first set; 3. The three phase electrical connection system of claim 1 or 2, wherein the permanent magnets of the second set have an opposite magnetic orientation to the permanent magnets of the first set.

4. The three-phase electrical connection system according to any one of claims 1 to 3, characterized in that each permanent magnet of the magnetic indexing device has the shape of a ring portion.

5. 5. The three-phase electrical connection system of claim 4, wherein each permanent magnet of the first set is formed with a ring portion extending over an angle selected to be greater than or equal to 40 degrees and strictly less than 120 degrees.

6. 5. The three phase electrical connection system of claim 4, wherein each permanent magnet of the first set is formed with a ring portion extending through an angular range selected from the range of 55 degrees to 100 degrees.

7. 5. The three phase electrical connection system of claim 4, wherein each permanent magnet of the first set is formed with a ring portion extending through an angle range selected from the range of 70 degrees to 90 degrees.

8. the electrical plug and the socket each have a respective electrical connection part; the individual electrical connection parts are respectively disposed on the electrical plug and the socket and connect with each other at three individual angular positions of the electrical plug relative to the socket; A three-phase electrical connection system according to any one of claims 1 to 7, characterised in that the three angular positions are spaced 120° apart from one another.

9. 9. A three-phase electrical connection system according to claim 8, characterized in that the electrical plug (F) comprises three first electrical phase terminals (L1, L2, L3) forming an equilateral triangle.

10. 10. The three-phase electrical connection system according to claim 9, characterized in that the electrical plug (F) comprises an electrical earth terminal (PE) located in the center of the equilateral triangle.

11. 11. A three-phase electrical connection system according to claim 9 or 10, characterized in that the electrical plug (F) comprises an electrical neutral terminal (N).

12. the socket (S) is provided with three electric phase terminals (L1', L2', L3') that form an equilateral triangle identical to that of the electric plug; 12. A three-phase electrical connection system according to any one of claims 9 to 11, characterized in that the three electrical phase terminals are arranged such that the electrical plug (F) can be connected to the socket (S) in three angular positions spaced 120° from one another.

13. The socket has three electrically neutral terminals (N1', N2', N3'), 13. The three-phase electrical connection system according to claim 12, characterized in that the electrical neutral terminal is configured such that the electrical plug (F) can be connected to the socket (S) in three angular positions spaced 120° from one another.

14. The electrical plug (F) comprises at least one electrical data transfer terminal (PP, CP); The socket (S) includes three first data transfer terminals (PP1', PP2', PP3') and three second data transfer terminals (CP1', CP2', CP3'), each of the first data transfer terminals is arranged such that the electrical plug can be connected to the socket at three angular positions spaced 120° apart from one another; 14. A three-phase electrical connection system according to claim 12 or 13, characterized in that each of the second data transfer terminals is arranged so that the electrical plug can be connected to the socket in three angular positions spaced 120° from one another.

Images