Winding arrangement for a linear motor with parallel pairs of coils made from a single continuous electrical conductor

Description

[0001] The present invention relates to a linear motor stator with an energizable winding arrangement according to the preamble of claim 1.

[0002] A winding arrangement for a linear motor as described in the preamble of claim 1 is known from JP 2012-147630 A.

[0003] Another winding arrangement is known from WO 2016 / 202798 A1. This known winding arrangement also includes a flat cooling housing through which a coolant can flow. The cooling housing has dimensions approximately equal to those of a coil housing accommodating the winding arrangement in every direction orthogonal to the coil pair winding axes. At least one coil of each coil pair, consisting of the first and second coils, contacts the cooling housing, so that heat generated in the coil pair due to its ohmic resistance can be conductively transferred to the cooling housing and from there convectively carried away by the coolant.

[0004] The flat cooling housing can be located either between the first and second coils of each coil pair or on one side of the coil pair.

[0005] A constant requirement for such winding arrangements is that their thickness dimension along the coil winding axes and along the coil pair winding axes is as small as possible.

[0006] A winding arrangement with such a small thickness dimension and high copper density in the coil housing is known from DE 10 2006 023 493 B4. This publication even discloses winding arrangements with more than two coil layers.In these known winding arrangements, the coils of different positions are arranged in a very complicated manner relative to each other along the subsequent axis, offset in such a way that for each coil, one of its coil sections running orthogonally to the subsequent axis is opposite a coil section of a winding of a coil of a different coil position, also running orthogonally to the subsequent axis, and this coil section is assigned to the same electrical phase and is always carrying current in the same direction, while the other coil section of the same coil, orthogonal to the subsequent axis, is not opposite a coil section in the same adjacent coil position.

[0007] Since the usual process of manufacturing a winding arrangement involves first arranging the coils and then electrically connecting them (i.e., wiring them together), the complex arrangement and wiring of the coils in the winding arrangement known from DE 10 2006 023 493 B4 poses an undesirably high risk of incorrect wiring of the individual coils. This can lead either to damage to an incorrectly wired winding arrangement or to undesirable repair costs. Furthermore, the complex routing of numerous intersecting conductor sections increases the risk of short circuits.

[0008] The coil housing, which accommodates the coils and the flat heat sink, of the winding arrangement known from WO 2016 / 202798 A1, completely separates the two housing components that form the known coil housing. The flat heat sink extends over the same area as the housing components. The winding arrangement known from WO 2016 / 202798 A1 discloses, as evidenced by its Figure 5The embodiment shown in WO 2016 / 202798 A1, with a cooling housing arranged between the first and second coil layers, features separate coil layers. Each of these layers must function as a winding arrangement on its own and is only arranged side by side along its coil winding axes to increase the copper content in the coil area by forming coil pairs. Therefore, a coil is only electrically connected to a coil of the same layer. While identical coil layers can be prepared and arranged side by side to simplify assembly, this also results in a significant effort for the electrical connection of the individual coils in their respective layers.

[0009] Furthermore, the flat heat sink increases the width of the operational winding arrangement as measured along the coil pair winding axes.

[0010] From US patent 2020 / 0048016 A1, a drive module for a linear transport system is known, comprising a housing and a stator. The stator is arranged in the housing and includes one or more coil assemblies, each with at least one coil and a stator tooth. The coil assembly is controlled to provide a traveling magnetic field. The magnetic field exits the coil assembly at the end faces and penetrates the housing shells, ultimately interacting with a magnet assembly on a transport carriage on the outside of the housing.

[0011] From WO 03 / 021741 A2, an air-cooled linear motor is known. The known linear motor has a closed housing containing a module block consisting of a winding body and windings applied to it. Cooling air is introduced into the housing via an air inlet provided for this purpose.

[0012] From US Patent 5,751,077, a linear motor armature with a sealed metal housing is known, in which a central chamber is formed. A lamination stack is accommodated in the central chamber. A coil assembly is arranged within the lamination stack. The central chamber is flushed with an electrically non-conductive fluid to cool the coil, the fluid being directed in opposite directions to facilitate bidirectional cooling.

[0013] The object of the present invention is to improve the linear motor stator mentioned above with its winding arrangement in such a way that, with essentially the same performance, it can be designed with the smallest possible thickness and reduced error potential of the interconnection of the coil pairs of the winding arrangement in such a way that it provides a magnetic field with the finest possible resolution.

[0014] The present invention solves this problem by means of a linear motor stator with all the features of claim 1. As already known from JP 2012-147630 A, at least one coil pair is designed as a single-conductor coil pair, in which the first and the second coil each have a connection section located radially outside the coil pair winding axis for connection to a phase of a power supply or to another coil and are electrically connected to each other in the coil pair eye area.

[0015] Due to the electrical connection of the first and second coils of a coil pair in the eye area, the entire coil pair is formed by a single, continuous electrical conductor. For this reason, such a coil pair is subsequently referred to as a "single-conductor coil pair".

[0016] The electrically conductive connection between the first and second coils of the single-wire coil pair in the eye area allows the two coils to be connected in a space that is initially unoccupied, thus providing sufficient space for the electrically conductive connection of the two coils of the single-wire coil pair. The single-wire coil pair thus formed has only two connection sections: one for connecting to a coil or power supply preceding it along the subsequent axis, in particular a preceding single-wire coil pair, and one for connecting to a coil or power supply following it along the subsequent axis, in particular a following single-wire coil pair.

[0017] In principle, the winding arrangement can only have exactly one single-wire coil pair. However, due to the advantages described above, the winding arrangement preferably has a plurality of single-wire coil pairs. For example, it is possible to populate individual coil locations in the winding arrangement with only a single coil in the first layer, in the second layer, or partially in both layers. For instance, the first and last coil locations along the subsequent axis can each have only a single coil to provide a weaker incoming and outgoing magnetic field at the input and output of the winding arrangement for a predetermined current magnitude, while all coil locations between the first and last coils are populated with single-wire coil pairs to generate the strongest possible magnetic field locally.Particularly preferably, the winding arrangement for providing a magnetic field that is as homogeneous as possible over the entire following axis comprises exclusively single-wire coil pairs.

[0018] The coil winding axes of the coils of the winding arrangement, in particular the coil pair winding axes of the winding arrangement, are preferably arranged parallel to each other and one behind the other along the subsequent axis. In a preferred embodiment, the winding arrangement serves as the winding arrangement of a linear motor and, in conjunction with a magnet arrangement in the case of a synchronous motor or with an induction arrangement, such as a plate made of electrically conductive material, in the case of an asynchronous motor, exerts a force acting along the subsequent axis on the magnet arrangement or induction arrangement, which moves along the subsequent axis relative to the winding arrangement. As a rule, due to the necessary power supply, the winding arrangement, in the case of use as a linear motor stator according to the invention, will be fixed along a track traversed by a linear motor-driven vehicle, while the magnet arrangement or induction arrangement will be located at a distance of approximately 10 meters.The induction loop is permanently mounted to the vehicle. The vehicle is preferably track-bound. The winding arrangement discussed here is preferably used on amusement rides, such as roller coasters, ghost trains, and water rides, although its use in public or private rail transport is not excluded. The track can therefore be defined by a single rail, a pair of rails, or a groove. The track can be a closed circuit that the track-bound vehicle can traverse multiple times in succession without changing direction, or it can be an open circuit that the track-bound vehicle can only traverse repeatedly between the track ends after a change of direction.

[0019] Although the main focus of the present application is on the use of the winding arrangement in a linear motor drive, the winding arrangement can also be used as part of a linear induction brake by selectively short-circuiting its coils or its single-line coil pairs, in which case the winding arrangement acts as a linear generator in conjunction with a magnet arrangement moving relative to it.

[0020] To ensure that the magnetic fields generated by both coils of a single-wire coil pair reinforce each other when energized, one coil of the first and second coils is wound in a single winding direction from radially outside to radially inside, while the other coil is wound in the same direction from radially inside to radially outside. Because the winding directions of the first and second coils are opposite when viewed along the coil pair's winding axis, the winding wire from one coil can be guided from radially outside to radially inside into the eye region of that coil. There, it is electrically connected to the winding wire of the other coil in its eye region and can then be guided back through the other coil from radially inside to radially outside.Thus, the two connection sections of the single-wire coil pair are advantageously located radially outside and easily accessible, while the electrically conductive connection between the first and second coil can be established in the coil pair eye area.

[0021] Preferably, the first and second coils of the single-conductor coil pair are arranged such that their two sections orthogonal to the subsequent axis overlap when viewed along the winding axis of the coil pair, and that their two sections parallel to the subsequent axis also overlap. Advantageously, the first and second coils of the single-conductor coil pair are of equal size, so that they contribute substantially equally to the magnetic field generated by the single-conductor coil pair. Thus, the ohmic resistances of the two coils of the single-conductor coil pair can also be approximately equal, so that the two coils of the single-conductor coil pair are subjected to approximately the same thermal load during operation.

[0022] According to this preferred embodiment, the manufacture of a single-conductor coil pair consisting of a first and a second coil can be simplified by making the first and second coils of the single-conductor coil pair identical and arranging them rotated 180° relative to each other about an arrangement axis that is orthogonal to both the subsequent axis and the winding axis of the coil pair. In this case, it is sufficient to manufacture only one type of coil and to connect any two coils in the aforementioned relative arrangement to form a single-conductor coil pair. To facilitate manufacturing, the electrically conductive connection of the first and second coils in the coil pair eye region is preferably a metallurgical bond, for example by soldering, optionally using a connecting sheath surrounding the two radially inner ends of the first and second coils.The connecting sheath can be a strip of material wound around the two radially inner ends of the first and second coils, or it can be a sleeve pushed over the two radially inner ends of the first and second coils.

[0023] It should be noted, however, that the electrically conductive connection of the radially inner end regions of the first and second coils need not be a metallurgical bond. The first and second coils can also be formed from a single length of winding wire, which, however, makes the production of a single-conductor coil pair more difficult compared to using separately manufactured and subsequently joined coils.

[0024] Although the first and second coils can be any type of coil, to ensure sufficient thermal capacity (i.e., the lowest possible ohmic resistance), while simultaneously minimizing dimensions along the coil winding axis and minimizing manufacturing costs, it is preferred that the first and second coils of the at least one single-wire coil pair are each coils, preferably flat-wire coils with only one winding plane due to the achievable higher copper density. Preferably, the first and second coils each have four straight coil sections, of which two consecutive coil sections around the coil winding axes enclose an angle of 70° to 110°, preferably 90°.Curved coil sections can be formed between straight coil sections, with their radius of curvature preferably decreasing as they approach the coil eye area, in order to arrange the copper of the winding wire of the respective coil as close together and as gap-free as possible.

[0025] To generate the desired temporally and spatially changing magnetic field in a linear motor, it is advantageous if the winding arrangement is designed for connection to a power supply with different electrical phases. In this case, the winding arrangement comprises a strand with single-wire coil pairs connected in series, for each connectable electrical phase. This strand is hereinafter also referred to as the "phase strand." As already explained above, according to the invention, each such phase strand comprises a plurality of single-wire coil pairs.

[0026] According to the invention, an advantageous arrangement of individual single-conductor coil pairs, each assigned to a different electrical phase, is provided that the winding arrangement comprises at least three single-conductor coil pairs immediately following one another along the successive axis, each of which is assigned to a different phase than the two single-conductor coil pairs immediately adjacent along the successive axis, between which the single-conductor coil pair is arranged. Thus, a magnetic field that changes in fine increments from one single-conductor coil pair to the next can be generated along the successive axis.

[0027] By combining coils arranged axially adjacent to each other with respect to their coil winding axes, forming a common coil pair eye area: first and second coil, into a single-conductor coil pair formed from a single currentable electrical conductor, a considerable simplification in the interconnection of the individual single-conductor coil pairs of the winding arrangement is also achieved.To simplify the wiring, for each strand connected to a different electrical phase, containing a plurality of single-wire coil pairs, the following applies: In a phase strand, single-wire coil pairs that follow directly one another along the subsequent axis—that is, those electrically connected directly without intermediate coils of the same phase—have a radially outer connecting section of a preceding single-wire coil pair connected to a radially outer connecting section of a subsequent single-wire coil pair, forming a connecting section that electrically connects the two single-wire coil pairs. One connecting section is located in the layer region of one layer consisting of the first and second layers, and the other connecting section is located in the layer region of the other layer consisting of the first and second layers.The connecting conductor section, which electrically connects two single-conductor coil pairs directly adjacent to each other in a phase sequence along the subsequent axis, therefore always runs across the virtual interface between the first coil layer and the second coil layer. In contrast to the prior art described above, two single-conductor coil pairs, i.e., four coils, can thus be electrically connected to each other with one connecting conductor section. This applies to a single-phase winding arrangement (not included in the present invention) as well as to a multi-phase winding arrangement.

[0028] Since connecting conductor sections cross in multiphase winding arrangements (i.e., those connectable to multiple electrical phases), it is advantageous to provide the necessary space for these crossings if the connecting conductor section runs away from each of the individual conductor coil pairs it connects in a different layer area and runs in an alternating section between the two layer areas, located at a distance from both individual conductor coil pairs connected by the connecting conductor section. Thus, the transition from one coil layer to the other can only occur in the alternating section that is spaced apart from the individual conductor coil pairs involved. This distance is perpendicular to the winding axes of the individual conductor coil pairs connected by the connecting conductor section.

[0029] Preferably, the switching sections can be located in a switching area extending along the follower axis and arranged at a distance from the single-line coil pairs. The dimension of the switching area along the follower axis is its largest dimension.

[0030] Preferably, a connection area is located between a coil section of the winding arrangement extending along the follower axis, in which all coils are accommodated, and the alternating section, in which preferably all alternating sections are accommodated. In this connection area, a connecting section of the phase strand is arranged, linking the respective alternating section to its directly connected single-conductor coil pairs. For clarity, preferably no alternating section is arranged in the connection area. Preferably, the connecting section of the electrical conductor of the phase strand extends with one component orthogonal to the single-conductor coil axes and with one component along the follower axis. Equally preferably, the alternating section of the electrical conductor of the phase strand extends with one component along the follower axis and with one component along the coil pair winding axes.To facilitate their installation, the aforementioned sections are preferably laid out using only the specified route components.

[0031] Preferably, for the most collision-free routing of the connecting cable sections, the connecting section of at least one connecting cable section, and preferably of all connecting cable sections, extends across the axial longitudinal center of the axial distance between the single-wire coil pairs directly connected by the connecting cable section, relative to the following axis. The connecting section thus extends on both sides of the axial longitudinal center of the distance. Particularly preferably, the connecting section extends equally far from the longitudinal center of the distance on both axial sides. Likewise, for advantageously collision-free routing, it is beneficial if the connecting section running from a single-wire coil pair to a connecting section is straight.Particularly preferred is at least one connecting line section, preferably each connecting line section, invariant with respect to a rotation by 180° about a symmetry axis that is orthogonal to both the subsequent axis and the coil pair winding axes. This means that the connecting line section is indistinguishable from a connecting line section rotated by 180° about the symmetry axis.

[0032] Preferably, to protect against external influences, the at least one single-conductor coil pair, and more preferably the entire winding assembly, is enclosed in a coil housing. To fix the coils of the winding assembly, which can be subjected to considerable mechanical forces during operation, as effectively as possible, an advantageous embodiment of the present invention provides a receiving cavity in the coil housing for each single-conductor coil pair from a plurality of single-conductor coil pairs. The respective single-conductor coil pair is then held in the receiving cavity. The receiving cavity is preferably designed to be complementary to the single-conductor coil pair it holds, so that the walls of the receiving cavity follow the opposing outer surface section of the held single-conductor coil pair without a gap or with a small gap, preferably less than 1 mm.By providing a gap, thermal expansion of the coils during operation can be taken into account. The reference state of the winding arrangement is an unenergized state at a room temperature of 20 °C.

[0033] To facilitate assembly, the coil housing can comprise two housing components. These two housing components, when joined together, form the coil housing. Assembly trials have shown that for effective, virtually error-free, and simple assembly, it is preferable if a portion of each receiving cavity is formed as a recess in one housing component and another portion as a recess in the other housing component, with the two portions of the same receiving cavity, formed in different housing components, preferably being of different sizes. This allows a single-wire coil pair to be inserted into the larger recess of one housing component, protruding from this recess along the coil pair winding axis. This ensures that even the single-wire coil pair inserted into the larger of the two recesses forming the receiving cavity remains accessible and manipulatorable for the assembler.Furthermore, this results in a coil housing with higher stability than if one housing component were to merely cover the other as an unprofiled cover.

[0034] By also forming a recess in the other housing component that contributes to the formation of the receiving cavity, its arrangement relative to the first housing component is readily recognizable when single-wire coil pairs are inserted and is usually only possible in a single orientation, which further reduces the risk of errors in assembly.

[0035] Advantageously, the recesses extend from the common joining plane of the coil housing components to different depths into the two housing components when connected. For simplicity, this joining plane is preferably oriented orthogonally to the parallel winding axes of the coil pair. The depth of the larger of the two recesses forming a receiving cavity is therefore preferably greater than the thickness of a coil selected from the first and second coils, but less than the thickness of the single-conductor coil pair formed by these coils.

[0036] The housing components can be manufactured using injection molding, for example, whereby a fiber-reinforced thermoplastic material can be used to increase component strength. Alternatively, the housing components can be manufactured using an additive manufacturing process, such as 3D printing.

[0037] For mechanically robust housing components, a fiber-reinforced, preferably glass-fiber-reinforced, thermoset can be used, with the recesses being machined into the housing components. The thermoset does not change its strength, or at least significantly less than a thermoplastic, when heated during operation of the winding arrangement.

[0038] The two housing components can be connected by an intermediate seal surrounding all coils housed within the coil housing. The area surrounded by the seal can also include the connecting cable sections. The seal can be a solid seal inserted between the housing components or a viscous seal applied as a bead to at least one housing component. Preferably, the viscous seal hardens elastically after application, particularly after the housing components are joined to form the coil housing. Preferably, at least one housing component, and preferably both housing components, has a sealing cavity for receiving the seal. Like the receiving cavity, the sealing cavity can extend to a different depth into each of the two housing components.

[0039] As mentioned above, the coil housing can have a coil area in which the receiving cavities for the single-wire coil pairs are arranged. The coil housing can further have a connection area adjacent to the coil area in which the connecting wire sections are arranged. The connection area can include the aforementioned connection area and the aforementioned switching area. To ensure that the coil area is easily accessible to the interacting magnetic or induction arrangement with the smallest possible air gap, all receiving cavities are preferably located on the same side of the connection area.

[0040] Since typically only the coil section interacts with the magnet or induction arrangement of the linear motor, the coil section can be designed with a thinner profile than the connection section to achieve the smallest possible air gap. As explained above, the thickness is to be measured along the coil winding axes or coil pair winding axes.

[0041] The winding arrangement discussed here can also be actively cooled by forced convection with a flowable cooling medium to dissipate heat from the winding arrangement and thus enable it to handle a higher electrical load. For this purpose, at least one cooling channel can be formed in the coil housing, into which at least one section of each single-conductor coil pair from the plurality of single-conductor coil pairs projects, so that the projecting sections can be wetted by a cooling medium flowing through the cooling channel. This allows the single-conductor coil pairs to transfer heat directly to the cooling medium flowing through the cooling channel. Such cooling of the single-conductor coil pairs requires no or only a negligible increase in the thickness dimension of the coil area of ​​the winding arrangement.

[0042] Although the cooling channel can, in principle, be designed as a separate channel within the coil housing, distinct from the other recesses in the housing components, it is advantageous to reduce the effort required to manufacture the coil housing if the receiving cavities form a section of at least one cooling channel. Preferably, each receiving cavity in which a single-wire coil pair is accommodated is a section of a cooling channel through which a cooling medium can flow.

[0043] To successively supply multiple receiving cavities with the cooling medium, these cavities can be connected by a flow channel through which the cooling medium can flow from one receiving cavity to the next along the subsequent axis. Thus, it may be sufficient to introduce cooling medium into the coil housing at an axial longitudinal end relative to the subsequent axis and to discharge it at a higher temperature at the opposite axial longitudinal end.

[0044] Preferably, the receiving cavity is annular. The coil-pair eye region can accommodate the interconnected radially inner coil ends of the first and second coils and is otherwise filled with material from the coil housing or with a ferromagnetic core material, so that essentially an annular space surrounding the filling of the eye region remains for receiving the single-conductor coil pair.

[0045] The cooling medium is preferably supplied to the receiving cavity from the aforementioned connection area. To ensure that the cooling medium flowing through the receiving cavity wets as large a section as possible of the single-conductor coil pair inserted into the receiving cavity, and to prevent a fluid-mechanical short circuit between a supplying and a discharging flow channel, a single-conductor coil pair can be bonded to a wall of the annular receiving cavity only locally by a material bond. This bond allows the flow of cooling medium from a flow channel supplying cooling medium to a flow channel discharging cooling medium from the receiving cavity to flow channel discharging cooling medium from the receiving cavity in only one direction along the annular receiving cavity. The material bond can be achieved, for example, by bonding or local potting.For example, the material-bonded connection can interrupt the shorter of two possible connection paths between a supply and a discharge flow channel, so that the cooling medium flowing through the receiving cavity always flows along the longest possible flow path between the supply and discharge of the cooling medium into or out of the receiving cavity.

[0046] Not only can individual coil pairs be accommodated in their respective receiving cavities, but the connecting cable sections can also be accommodated in specially designed cable cavities within the coil housing. These cable cavities are preferably designed to be complementary to the connecting cable sections they accommodate, so that the shape of the cable cavities essentially corresponds to the shape of the connecting cable sections they contain. Preferably, to reduce manufacturing effort, the cable cavities can be part of the flow channel. In a preferred embodiment of the present invention, at least one connecting cable section, and preferably a plurality of connecting cable sections, is accommodated in the flow channel connecting the receiving cavities.Since the connecting conductor sections already run between two single-conductor coil pairs, the conductor cavities that accommodate them run between two receiving cavities and connect them fluid-mechanically. Preferably, several cooling channels supplied with cooling medium are formed in the coil housing; particularly preferably, the number of cooling channels corresponds to the number of electrical phases to which the winding arrangement can be connected. Most preferably, a separate cooling channel is formed for each phase strand.

[0047] The coil housing can have mounting features by means of which it can be connected to a support structure. The support structure is preferably also a support structure of the track of the track-bound vehicle, which is driven and preferably also braked using the winding arrangement. The above-described design of the winding arrangement and the surrounding coil housing allows for an advantageous configuration of the mounting features as through-holes penetrating the coil housing in the thickness direction. These through-holes can also be easily sealed in the manner described above by placing a gasket between the housing components. The connection of the coil housing to the support structure is preferably a detachable connection, for example by screws or bolts and nuts.

[0048] The routing of the connecting cable sections described above enables the formation of areas in the connection area which are completely free of electrical functional components, so that preferably at least a part of the assembly formations is arranged and / or formed in the connection area.

[0049] If at least part of the assembly includes through-holes penetrating the coil housing, each of these through-holes can be located within a window area surrounded by connecting cable sections within the connection area. Such a window area is a region free of electrical functional components.

[0050] Similarly, a section of the coil housing free of electrical conductors of the coils and the connecting cable sections connecting them can be configured to accommodate at least one sensor. For example, at least one sensor recess for receiving a sensor, such as a temperature sensor, can be formed in the coil housing. Preferably, the sensor recess is also located in the connection area. A signal transmission line connecting the sensor to a control device can be routed in a separate signal line cavity in the coil housing, particularly in its connection area. The signal line cavity can be partially identical to a aforementioned cable cavity for accommodating the connecting cable sections, so that, in certain sections, the signal transmission line of a sensor and a connecting cable section are routed in one and the same cavity in the coil housing.In certain sections, particularly in the connection area of ​​the coil housing, the signal line cavity may be provided outside the first and second layers of the coils to avoid collisions with the connecting line sections.

[0051] For the precise control of the magnetic field generated by the winding arrangement, knowledge of the position of the magnet arrangement or induction arrangement moving relative to the winding arrangement, or more generally, of the vehicle moving relative to the winding arrangement, is advantageous. In particular, knowledge of the position immediately before an overlap between the magnet arrangement or induction arrangement on the one hand and the winding arrangement on the other is advantageous in order to control the magnetic field of the winding arrangement as closely as possible to the movement of the magnet arrangement or induction arrangement. Preferably, the winding arrangement therefore includes a probe for detecting the position and / or movement of a magnet arrangement or induction arrangement that interacts with the winding arrangement via a linear motor. Preferably, the winding arrangement includes a probe housing in which the probe is received and which is connected to the coil housing.Since the winding arrangement is preferably designed for use in synchronous linear motors, which use a magnet arrangement having a plurality of permanent magnets as a linear motor component interacting with the winding arrangement, the probe is preferably a magnetic field-sensitive probe, such as a Hall probe.

[0052] The term "probe" is synonymous with the term "sensor" and is used only for linguistic differentiation from the aforementioned sensor inside the coil housing for determining operating parameters, such as temperature and winding arrangement.

[0053] In principle, the probe housing can be integrally connected to the coil housing. However, since several winding arrangements can also be arranged one behind the other in the direction of the subsequent axis, of which only the winding arrangement furthest forward in the relative direction of movement of the magnet arrangement or induction arrangement, and thus the first to be reached, requires a position probe, the probe housing is preferably detachably connected to the coil housing as intended.

[0054] For a particularly secure and permanently detachable connection between the probe housing and the coil housing, fastening elements can be formed on the probe housing. These elements can engage with corresponding fastening elements on the coil housing to connect the two housings. The engagement is preferably a positive-locking engagement. A fastening element and a corresponding fastening element can be a projection that engages in a recess, preferably a complementary recess, of the other element. To avoid unnecessarily protruding component sections on the coil housing when no probe housing is required, the fastening elements are preferably projections and the corresponding fastening elements are preferably recesses.

[0055] The present invention will be explained in more detail below with reference to the accompanying drawings. It illustrates: Fig. 1 a top view of a linear motor stator according to the invention with a coil housing containing a winding arrangement, Fig. 2 the stator of Figure 1 without an associated probe housing, but mounted on a support structure, Fig. 3 a cross-sectional view through the stator of Figure 2 along the section plane III-III of Figure 2 , Fig. 4 the stator of the Figures 1 to 3 with the first housing component removed, Fig. 5 shows a second embodiment of the stator. Figure 4 with several cooling channels and flow channels accommodating connecting line sections, and Fig. 6 a third embodiment of the stator of Figure 4 without a cooling channel, but with sensors mounted on the coil housing.

[0056] In Figure 1 is a linear motor stator 10 in top view with a viewing direction along coil winding axes of the coil housing 12 and therefore in Figure 1The coils shown are currentable and not depicted. The coil winding axes run orthogonally to the plane of the drawing. Figure 1 A subsequent axis F, along which the individual coils are arranged sequentially as single-line coil pairs, runs parallel to the plane of the drawing. Figure 1 .

[0057] The coil housing 12, which for reasons of achievable high mechanical and thermal strength is preferably made of a thermoset reinforced with a glass fiber fabric, such as an epoxy resin, comprises two housing components, of which the observer of the Figure 1 and 2 looking at the smaller, front housing component 12a in the direction of view, which contains the Figure 1 and 2 Behind it, a larger second housing component 12b (see Figures 3 to 6 ) covered.

[0058] Along the edge of the coil housing 12, a plurality of through holes 14 are formed, which completely penetrate the coil housing 12 and accommodate fasteners, such as screw-nut combinations, to securely and preferably detachably connect the two housing components 12a and 12b. For clarity, only some of the through holes 14 are labeled.

[0059] In the coil housing 12, a plurality of mounting holes 16 are formed as mounting elements, equidistant along the subsequent axis F, which also secure the coil housing 12 in the plane of the drawing. Figure 1The thickness direction D, which is orthogonal and thus parallel to the coil winding axes, completely penetrates the surface. The mounting holes 16, of which only three of the seven are labelled for clarity, serve to fasten the coil housing 12 or the stator 10 to a support structure T indicated only by dashed lines, for example, to a truss 18 which carries a rail arrangement S for guiding a track-bound vehicle V.

[0060] The vehicle V moves along the following axis F past the stator 10. Typically, the vehicle V carries a magnet assembly MA, which comprises a plurality of permanent magnets with alternating polarity arranged successively along the following axis F. This magnet assembly MA, together with the stator 10, forms a synchronous linear motor. The vehicle V is preferably a car or a train of several cars from an amusement ride, such as a roller coaster.

[0061] The coil housing 12 has a coil section 20 in which the coils are arranged, and a connection section 22 adjacent to the coil section 20 in which the electrical conductor sections connecting the individual coils are housed. Since the magnet assembly MA of the vehicle V only interacts with the coils in the coil section 20 to generate force, the coil section 20 is designed with a smaller thickness than the connection section 22, the thickness of which is less critical, in order to achieve the smallest possible air gap. Preferably, the mounting holes 16 are arranged in the connection section 22, due in part to the greater thickness of the connection section 22 and the associated higher strength of this component section.

[0062] The coils inside the coil housing can be supplied with electrical energy via terminal boxes 24 and 26 at the longitudinal ends. In this example, the stator 10 is a three-phase stator supplied with three-phase current. The three-phase current is manipulated in a known manner by a frequency converter (not shown) to control the driving force generated by the stator 10 in conjunction with the magnet assembly MA.

[0063] At the in Figure 1In addition to the three connections for each electrical phase, the left terminal box 24 has a further connection for signal transmission lines, which can lead to sensors housed in the coil housing 12. Both terminal boxes 24 and 26 also have space for a cooling media line 28, indicated only by dashed lines, to guide cooling medium into and out of the coil housing 12, thereby convectively cooling the coils housed in the coil housing 12.

[0064] At the in Figure 1At the left axial (relative to the subsequent axis F) longitudinal end, a probe housing 30 is detachably mounted to the coil housing 12, for example by screw-nut combinations. In the illustrated example, a magnetic field-sensitive probe 32, such as a Hall probe, is housed in the probe housing 30. This probe detects the magnetic field of the magnet arrangement MA carried by the vehicle V, determines the current position of the vehicle along the rail arrangement S, and transmits this information via a signal transmission line to a control device (not shown). Taking into account the vehicle position determined by the probe 32, the control device controls the frequency converter that energizes the coils in the coil housing 12.

[0065] For simple yet secure connection to the coil housing 12, the probe housing 30 has projecting protrusions 34 as fastening elements 36, which engage positively in recesses 38 as fastening counter-elements 40 in the coil housing 12. The fastening counter-elements 40, designed as recesses 38, are located on the Figure 1 The right axial longitudinal end of the coil housing 12 is recognizable, to which no probe housing 30 is mounted.

[0066] The fastening elements 36 are arranged in pairs opposite each other in the thickness direction D on the probe housing 30, with the section of the coil housing 12 located between the fastening elements 40 in the thickness direction being positioned between the fastening elements 36. The probe housing 30, therefore, surrounds a section of the coil housing 12 in a fork-like manner with the fastening elements 36. The shapes of the fastening elements 36 and the fastening elements 40 are complementary to each other, so that the relative position of the probe housing 30 relative to the coil housing 12 is essentially fixed once the positive engagement between the fastening elements 36 and the fastening elements 40 is established.Fastening openings 42 in the fastening formations 36 and fastening openings 44 in the fastening counter-formations 40 align with each other after the positive locking engagement between the fastening formations 36 and the fastening counter-formations 40 has been established, so that the fastening formations 36 can be secured to the fastening counter-formations 40 by means of fasteners that can be released as intended, such as screw-nut combinations.

[0067] In the Figures 2 and 3 The stator 10 is shown mounted on the support structure T without probe housing 30. Figure 3 is a cross-sectional view of stator 10 along plane III-III in Figure 2 .

[0068] On the side of the first housing component 12a, the stator 10 is fastened to an angle profile 48 by a plurality of screw-nut combinations 46, the screws of which pass through the mounting holes 16. The angle profile 48 is in turn mounted to a further support body 52 by a plurality of screw-nut combinations 50.

[0069] On the side of the second housing component 12b, the stator 10 is mounted to a flat profile 54 by a plurality of screw-nut combinations 46. Preferably, the angle profile 48, the support body 52, and the flat profile 54 are components made of steel, although other materials are not excluded.

[0070] As in Figure 3As can be seen, in the coil area 20 with the smaller thickness dimension in the thickness direction D, a first coil 56, located closer to the first housing component 12a, and a second coil 58, located closer to the larger second housing component 12b, are accommodated in the coil housing 12. The coil housing 12 has a receiving cavity 60 for this purpose, in which the first coil 56 and the second coil 58 are accommodated.

[0071] When current is applied to coils 56 and 58, they generate a magnetic field M in their surroundings that changes over time and space in a manner known per se.

[0072] The receiving cavity 60 is formed to a greater extent in the second housing component 12b and only to a lesser extent in the first housing component 12a, which facilitates the assembly of the stator 10. The receiving cavity 60 is formed centrally in the thickness direction of the coil housing 12, whereas the joining plane 12c of the first and second housing components 12a and 12b, respectively, is offset from the center of the coil housing 12 in the thickness direction. The second coil 58 is therefore completely received in the recess 60b in the second housing component 12b, which contributes to the formation of the receiving cavity 60, while the first coil 56 is received partly in the recess 60b and partly in the recess 60a of the first housing component 12a, which also contributes to the formation of the receiving cavity 60. This allows the coils 56 and 58 to be initially arranged on the second housing component 12b and manipulated according to an arrangement.Mounting the first housing component 12a with the second housing component 12b completes the two recesses 60a and 60b to form the receiving cavity 60 and fixes the two coils 56 and 58 in the coil housing 12.

[0073] The first coil 56 and the second coil 58 are wound around virtual collinear coil winding axes SW and overlap almost completely along the common coil winding axes SW. Each coil 56 and 58 has an eye region 62 and 64, respectively, free of coil turns, in its radially inner region. The section plane III-III penetrates the first and second coils 56 and 58 centrally such that the coil winding axes SW, which are imagined to be centrally penetrating the eye regions 62 and 64, are located in the section plane III-III.

[0074] The stator 10 has several first coils 56 arranged one after the other along the subsequent axis F, which are arranged in a common first coil layer 66. Likewise, the stator 10 has several second coils 58 arranged one after the other along the subsequent axis F, which are arranged in a common second coil layer 68. The two coil layers 66 and 68 are directly adjacent to each other along the coil winding axes SW.

[0075] The first and second coils 56 and 58 respectively are located in their radially inner edge region, more precisely in the common eye region 62 and 64 with their radially inner longitudinal ends 56a (see Figure 4 ; the longest end 56a lies in Figure 3immediately in front of the section plane III-III) or 58a, electrically connected, such that the first coil 56 and the second coil 58 form a single-conductor coil pair 70 consisting of an electrically continuous conductive conductor. The virtual coil pair winding axis PW, which is conceived as centrally penetrating the coil pair eye region 72 formed by the eye regions 62 and 64, is collinear with the coil winding axes SW.

[0076] In the connecting area 22, the sectioning plane III-III intersects separately located areas of a connecting cavity 74 in the sectioning plane III-III.

[0077] In the upper region, two electrical conductors 76 and 78 of different connecting conductor sections 80 run, which connect single-conductor coil pairs 70 arranged at a distance from each other along the subsequent axis F in the coil housing 12 and belonging to the same electrical phase, none of which connecting conductor section 80 is connected to the cut single-conductor coil pair 70. The electrical conductors 76 and 78, which lie next to each other in the section plane III-III in the thickness direction D, are electrically separated from each other by an electrically insulating material layer 79 arranged between them.

[0078] In the lower part of the connection cavity 74, an alternating section 80a of a connecting line section 80 located behind the section plane III-III can be seen.

[0079] The magnet arrangement MA is also shown in dotted line, which has two partial magnet arrangements arranged at a distance from each other, wherein in the driving operation of the vehicle V, when viewed in a vehicle-fixed coordinate system, the stator 10 is moved through the gap formed between the partial magnet arrangements.

[0080] Figure 4 shows the stator 10 of the Figures 1 to 3 from the perspective of Figure 2 , however, with the first housing component 12a removed. Thus, the winding arrangement 11 of the stator 10 with six single-line coil pairs 70 can be seen.

[0081] The winding arrangement 11 is a three-phase winding arrangement 11, which can be connected to three electrical phases u, v, and w of a three-phase power supply. The three-phase configuration is merely an example. To distinguish the connection-related assignment of the individual single-wire coil pairs 70 to the individual electrical phases, the electrical phases are added as a subscript to the reference numerals 70 of the single-wire coil pairs. As in Figure 4As can be seen, no two single-conductor coil pairs 70 assigned to the same electrical phase are adjacent to each other along the sequence axis F. Of any three single-conductor coil pairs 70 immediately following one another along the sequence axis F, the middle single-conductor coil pair is always assigned to a different electrical phase than the single-conductor coil pair preceding and following it along the sequence axis F. This also applies if the winding arrangement 11 were only two-phase.

[0082] The viewer of Figure 4The viewer looks at the single-wire coil pairs 70 along the winding axis PW. Only the first coil 56, which is closer to the viewer, is visible in the first coil layer 66. This coil almost completely obscures the second coil 58 of the respective single-wire coil pair 70 in the second coil layer 68. Only the radially inner longitudinal ends 58a of the second coils 58 are visible next to the radially inner longitudinal ends 56a of the first coils 56, as well as the radially outer connection sections 58b leading away from the second coils 58. In the example shown, the radially outer connection sections 56b of the first coils 56 form the supply line for electrical current to the first coil 56. For clarity, only the connection sections 56b and 58b for the two leftmost single-wire coil pairs 70 are labeled.

[0083] As in Figure 4As indicated on the far left single-wire coil pair 70, in the direction of view from Figure 4 The first coil 56 is wound clockwise from radially outside to radially inside until it reaches the radially inner end 56a. In the same direction, the second coil 58, located behind the first coil 56, is wound clockwise from radially inside to radially outside. In fact, the first coil 56 and the second coil 58 of each single-line coil pair 70 are manufactured identically and are arranged rotated 180° relative to each other about a change axis CA that is orthogonal to both the subsequent axis F and the coil pair winding axis PW, which in the illustrated example corresponds to the coil winding axes SW. In this way, only one type of coil is sufficient to manufacture the winding arrangement 11; these coils simply need to be arranged in the appropriate orientation relative to each other.

[0084] Single-line coil pairs 70 of the same electrical phase are each electrically connected to each other by a connecting line section 80. This will be explained using the example of phase u: the in Figure 4 The leftmost single-wire coil pair 70u is connected via connection section 56b through the terminal box 24 to an electrical power source, such as a frequency converter. Connection section 56b, like the entire first coil 56u, is located only in the first coil layer 66 (see Figure 3 ).

[0085] By connecting the radially inner longitudinal ends 56a and 58a together, the connection section 56b of the first coil 56u is connected to the connection section 58b of the second coil 58u by a single electrical conductor, whereby the connection section 58b, like the second coil 58u, is also located only in the second coil layer 68.

[0086] The connection section 58b of the leftmost single-wire coil pair 70u is part of a connecting line section 80, which initially runs with a connecting section 80a in the second coil layer 68 into a switching area 82 of the connection cavity 74, where a switching section 80b of the connecting line section 80 runs from the second coil layer 68 to the first coil layer 66 and from there in a further connecting section 80c as connection section 56b to the fourth single-wire coil pair 70, which is, from left to right, the second single-wire coil pair 70u. Again, for the sake of clarity, not all connecting sections 80a and 80c are shown in Figure 4 The connecting line sections 80 are marked with reference numbers. They are essentially identical in construction.

[0087] As in Figure 1For the sake of clarity, only phase w is shown. The alternating sections 82 of all connecting line sections 80 extend across the axial longitudinal center LM of the axial distance AA, relative to the subsequent axis F, which the individual line coil pairs 70 directly connected by the respective connecting line sections 80 have from one another. The alternating sections 82 extend to both axial sides of the longitudinal center LM of the distance, and preferably equidistant from the longitudinal center LM of the distance. The connecting sections 80a and 80c running from the individual line coil pairs 70 of a phase to the alternating sections 82 connecting them are straight. The connecting line sections 80 are invariant with respect to a rotation by 180° about the symmetry axis SA, which is orthogonal to both the subsequent axis F and the coil pair winding axes PW and passes through the distance longitudinal center LM.Each connecting line section 80 is therefore mapped onto itself by rotating it 180° around the axis of symmetry.

[0088] If further single-line coil pairs 70 of phase u were present, these would be electrically connected in series with the single-line coil pairs already described via further connecting line sections 80. Figure 4 However, the connection section 58b of the fourth single-line coil pair 70 from the left is reconnected to the electrical power supply via the terminal box 26.

[0089] The same applies to the strands of the other electrical phases v and w as stated for electrical phase u. Their connecting conductor sections 80 are designed like the connecting conductor section 80 of electrical phase u.

[0090] The connection sections 56b of the first coils 56 and the connecting sections 80a of the connecting line sections 80 each have a component of inclination along the following axis F and along the change axis CA. The same applies to the connection sections 58b of the second coils 58 and the connecting sections 80c of the connecting line sections 80, wherein within a connecting line section 80, the inclination of the connection sections 56b and 58b and the connecting sections 80a and 80c relative to the following axis F about an inclination axis orthogonal to the coil pair winding axis PW is of equal magnitude but opposite direction. Preferably, the connecting sections 80c of the connecting line sections 80 exhibit only the aforementioned components of inclination.

[0091] In contrast to the connecting sections 80a and 80c of a connecting line section 80, the switching sections 80b are inclined, preferably only, about an inclination axis parallel to the change axes CA in order to effect the change between the first coil layer 66 and the second coil layer 68.

[0092] How Figure 4 As shown, the mounting openings 16 are formed in window areas 81, each formed by intersecting connecting conductor sections 80 of the three different electrical phases or phase strands. Thus, the stator 10 can be mounted to a support structure T at a sufficient distance from both the individual conductor coil pairs 70 and the edge of the coil housing 12, so that a very secure connection to a support structure T can be achieved solely through the mounting opening in 16, without the need for any additional aids.

[0093] The second housing component 12b has a circumferential receiving groove 84 for receiving a seal, which seals the winding arrangement 11 radially outwards against the joining gap 12d of the housing components 12a and 12b. A seal received in the receiving groove 84 can be a solid seal, which is inserted into the receiving groove 84, or it can be a viscous seal, which is applied as a viscous bead into the receiving groove 84 and then hardens therein.

[0094] The connection cavity 74 has conductor cavities 86 in which the connection sections 56b and 58b are accommodated. To minimize any reduction in the strength of the coil housing 12, the conductor cavities 86 are designed with a small gap of at most 1 mm, complementing the electrical conductors 73, 76 and 78 accommodated therein, which also form the conductor strands of the electrical phases u, v and w.

[0095] A cooling channel 88 can be formed in the coil housing 12, of which the receiving cavities 60 form a part, so that cooling medium can flow in a gap between the walls delimiting the receiving cavities 60 and the single-conductor coil pairs 70 received in the receiving cavities 60. This allows Joule heat to be directly dissipated from the single-conductor coil pairs 70 by the cooling medium.

[0096] The cooling medium can flow through flow channels 90 from a receiving cavity 60 to the receiving cavity 60 immediately adjacent along the subsequent axis F.

[0097] The cooling medium can be supplied via the cooling medium line 28 through a connection box 24 or 26 and discharged again from the coil housing 12 through the other connection box. It is assumed below that the cooling medium is supplied through the Figure 4The coolant is fed into the left cooling media line 28 of the connection box 24 and discharged again via the right cooling media line 28 of the connection box 26.

[0098] The in Figure 4 The leftmost conduit cavity 86 can be part of the cooling channel 88. Cooling medium, gaseous or liquid or as a two-phase flow, can thus flow through these conduit cavities 86 into the Figure 4 far left receiving cavity 60.

[0099] To ensure that the cooling medium introduced into the receiving cavity 60 does not flow directly to the next flow channel 90, and thus to maximize the wetted area of ​​each single-conductor coil pair 70, the single-conductor coil pairs 70 can only be connected to the surrounding wall of the receiving cavity 60 by adhesive or casting compound locally in an area 92, without gaps or gaps. This also provides a material bond between the single-conductor coil pairs 70 and their respective receiving cavity 60.Secondly, this results in the shorter connection paths between an inlet conduit cavity 86 and a flow channel 90 or between an inlet and a discharge flow channel 90 or between an inlet flow channel 90 and an outlet conduit cavity 86 being blocked in terms of flow technology, so that when the cooling medium flows through the receiving cavities 60, only the longer path between the inlet and outlet around the coil pair eye area 72 is available as a flow path.

[0100] Thus, the coil housing 12 can be permeated by cooling medium, whereby, according to this solution, the receiving cavities 60 following one another along the subsequent axis F are each individually permeated by cooling medium, which consequently heats up more and more along the subsequent axis F, so that the convective heat transport decreases when flowing from left to right along the direction of flow.

[0101] In Figure 5A second embodiment of a winding arrangement 111 or a stator 110 of the present invention is shown. The same and functionally identical components and component sections are used as in the first embodiment. Figures 1 to 4 are in the second embodiment of Figure 5 with the same reference numerals, but increased by the number 100. The second embodiment of Figure 5 will only be described below insofar as it differs from the first embodiment of the Figures 1 to 4 differs, the description of which is otherwise also used to explain the second embodiment of Figure 5 is referred.

[0102] The essential difference between the first embodiment and the second embodiment of Figure 5 The difference lies in the design of the cooling channel 188. In contrast to the first embodiment, the second embodiment follows the Figure 5The cooling media flow inside the coil housing 12 completely follows the path of the electrical conductors 173, 176 and 178. Thus, the conductor cavities 186 are designed as flow channels 190, or, put another way: the connecting conductor arrangements 180 are arranged in flow channels 190.

[0103] Each electrical phase is assigned a cooling channel 188, of which the flow channels 190 are a part. A further part of each cooling channel 188 consists of the receiving cavities 160 and the transition area 182, which in the second embodiment is subdivided into a plurality of compartments by interruptions 183. Cooling medium can flow in each cooling channel 188 without affecting the flow of cooling medium in a cooling channel 188 of a different electrical phase. For this purpose, the electrically insulating material layers 179 can also fluidically separate the conductor cavities 186, in which the electrical conductors 173, 176, and 178 of the respective electrical phases are received. Alternatively, however, at the intersections of conductor cavities 186 of different electrical phases, an overflow of cooling medium from one conductor cavity to the other can be permitted.Because of the unambiguous assignment of the cooling channels 188 to the individual electrical phases, the cooling channels in the second embodiment, as well as the flow channels 190 and the compartments of the switching area 182, are provided with indices u, v and w according to their assignment to electrical phases.

[0104] The subdivisions 183 of the exchange area 182, which form flow barriers for the cooling medium and divide the exchange area 182 into a plurality of compartments successive along the subsequent axis, are preferably formed integrally with the housing components 112a and 112b, but can also be arranged as separate components sealingly within an exchange area 82 that initially extends continuously along the subsequent axis F as in the first embodiment. Preferably, only exactly one exchange section 180b is arranged in a compartment of the exchange area 182.

[0105] The cooling media line 128 of the connection box 124, which in the exemplary embodiment of Fig. 5 For example, the cooling media supply line supplies three cooling channels 188u, 188v, and 188w. The cooling media line 128 can therefore be divided into three sub-lines, or the division of the cooling media supply into individual cooling channels can take place in the connection box 124, or three cooling media lines 128 can be provided per connection box 124 and / or 126. Accordingly, in the second embodiment, no flow channels are provided that lead from one receiving cavity 160 to the receiving cavity 160 immediately adjacent along the subsequent axis F.

[0106] In Figure 6 A third embodiment of a winding arrangement 211 or a stator 210 of the present invention is shown. The same and functionally identical components and component sections as in the first embodiment are used. Figures 1 to 4are in the third embodiment of Figure 6 with the same reference numerals, but increased by the number 200. The third embodiment of Figure 6 will only be described below insofar as it differs from the first embodiment of the Figures 1 to 4 differs, the description of which also serves to explain the third embodiment of Figure 6 is referred.

[0107] The third embodiment of the stator 210 or the winding arrangement 211 corresponds essentially to the first embodiment, except that the third embodiment does not include a cooling channel. However, such a channel can be provided, either as a serial cooling channel as in the first embodiment, in which flow channels 90 connect directly adjacent receiving cavities 60 along the subsequent axis F, or as several cooling channels, each of which follows the path of an electrical conductor of an electrical phase.

[0108] Accordingly, the transition area 282 is formed continuously along the subsequent axis F, since it is not intended for guiding a cooling medium flow.

[0109] Signal cavities 294 extend from the switching area 282, which is a conductor cavity 286 of the connecting conductor sections 280. These signal cavities connect the switching area 282 to sensor recesses 296 and 298, respectively. These recesses are located near a receiving cavity 260 in the connection area 222, but are physically separate from the receiving cavities 260. They are designed to accommodate sensors that can, for example, detect the temperature of the respective single-conductor coil pair 270 housed in the receiving cavity 160. The sensor recesses 296 and 298 are shown to illustrate that they can have any shape, depending on the sensor to be housed in them.

[0110] Signal transmission lines can be accommodated in the signal line cavities 294, which transmit a detection signal from the sensor located in the respective sensor recess 296 or 298 to a control device. The signal transmission lines can be routed via the switching area 282 and one of the terminal boxes 224 or 226, in the illustrated example via terminal box 224 out of the coil housing 212.

[0111] The junction box 226 is in Figure 6 Omitted. Therefore, the individual electrical conductors 273, 276 and 278 can be seen in their path as they exit the coil housing 212.

[0112] In the example shown, the first coils 56, 156 and 256, and the second coils 58, 158 and 258, are each flat wire coils with exactly one winding plane. Each winding plane defines the position 66 or 68 of the corresponding plurality of first and second coils, respectively.

Claims

1. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) for generating a temporally and spatially varying magnetic field (M) in the spatial neighborhood of the winding arrangement (11; 111; 211), comprising a plurality of coils (56, 58; 156, 158; 256, 258), of which each exhibits a wire (73, 76, 78; 173, 176, 178; 273, 276, 278) wound in several turns around a virtual coil winding axis (SW), where the coil winding axis (SW) penetrates through a radially interior eye region (62, 64; 162, 164; 262, 264) free from wire turns of the coil (56, 58; 156, 158; 256, 258), where the winding arrangement (11; 111; 211) exhibits a first layer (66) of first coils (56; 156; 256) arranged one after another without overlapping along a sequence axis (F) with coil winding axes (SW) parallel to each other and a second layer (68) of second coils (58; 158; 258) arranged one after another without overlapping along the sequence axis (F) with winding axes (SW) parallel to each other, where the winding arrangement (11; 111; 211) comprises a plurality of coil pairs (70; 170; 270) arranged one after another along the sequence axis (F) with a virtual coil pair winding axis (PW) oriented transversely to the sequence axis (F), of which every coil pair (70; 170; 270) exhibits a first coil (56; 156; 256) and a second coil (58; 158; 258). each with a coil winding axis (SW) parallel to or collinear with the coil pair winding axis (PW), where the first and the second coil (56, 58; 156, 158; 256, 258) are arranged axially adjacent to each other relative to the coil pair winding axis (PW) in such a way that wire turns of the first and of the second coil (56, 58; 156, 158; 256, 258) are axially adjacent to each other and the eye regions (62, 64; 162, 164; 262, 264) of the first coil (56; 156; 256) and of the second coil (58; 158; 258) are axially adjacent to each other while forming a common, spatially continuous coil-pair eye region (72; 172; 272), where the coil pair winding axis (PW) penetrates through the coil-pair eye region (72; 172; 272), wherein at least one coil pair (70; 170; 270) is configured as a single conductor coil pair (70; 170; 270), in which the first and the second coil (56, 58; 156, 158; 256, 258) each exhibit a connecting section (56b, 58b; 156b, 158b; 256b, 258b) lying radially outside relative to the coil pair winding axis (PW) for connecting to a phase of a power supply or to a further coil (56, 58; 156, 158; 256, 258) and are connected to each other electroconductively in the coil-pair eye region (72; 172; 272), wherein the winding arrangement (11; 111; 211) is configured for connecting to a power supply with different electrical phases, where each connectable phase is assigned one strand each with a plurality of single conductor coil pairs (70; 170; 270) connected electrically in series, where the winding arrangement (11; 111; 211) exhibits at least three single conductor coil pairs (70; 170; 270) following each other immediately along the sequence axis (F), of which every single conductor coil pair (70; 170; 270) is assigned to a different phase than the two immediately adjacent single conductor coil pairs (70; 170; 270) along the sequence axis (F) between which the single conductor coil pair (70; 170; 270) is arranged, wherein the winding arrangement (11; 111; 211) contains a strand with a respective plurality of single conductor coil pairs (70; 170; 270) connected electrically in series for each connectable electrical phase.

2. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to Claim 1, Characterized in that when regarding the single conductor coil pair (70; 170; 270) along the coil pair winding axis (PW), one coil (56; 156; 256 or 58; 158; 258) out of first (56; 156; 256) and second coil (58; 158; 258) is wound in one winding direction from radially outside towards radially inside and the respective other coil (58; 158; 258 or 56; 156; 256) is wound in the same winding direction from radially inside towards radially outside, wherein preferably the first and the second coil (56, 58; 156, 158; 256, 258) of the single conductor coil pair (70; 170; 270) are configured identically and are arranged rotated by 180° relative to each other about an arrangement axis (CA) orthogonal both to the sequence axis (F) and to the coil pair winding axis (PW).

3. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to one of the preceding claims, Characterized in that the first and the second coil (56, 58; 156, 158; 256, 258) of the at least one single conductor coil pair (70; 170; 270) are each coils with only one winding plane.

4. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to one of the preceding claims, Characterized in that for every strand connected to a different electrical phase each with a plurality of single conductor coil pairs (70; 170; 270), it is the case that of single conductor coil pairs (70; 170; 270) following each other immediately along the sequence axis (F) in the strand, a radially outside located connecting section (58b; 158b; 258b) of the one single conductor coil pair (70; 170; 270) with a radially outside located connecting section (56b; 156b; 256b) of the following single conductor coil pair (70; 170; 270) is connected to a connecting conductor section (80; 180; 280) electroconductively connecting the two single conductor coil pairs (70; 170; 270), where the one connecting section (58b; 158b; 258b) is located in the layer region of one layer (68) out of first (66) and second layer (68) and the respective other connecting section (56b; 156b; 256b) is located in the layer region of the respective other layer (66) out of first (66) and second layer (68).

5. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to Claim 4, Characterized in that the connecting conductor section (80; 180; 280) proceeds away from each of the single conductor coil pairs (70; 170; 270) connected by it in a different layer (66, 68) than the respective single conductor coil pair (70; 170; 270) and proceeds in a changeover section (82; 182; 282) between the two layer regions located at a distance from the two single conductor coil pairs (70; 170; 270) connected by the connecting conductor section (80; 180; 280), wherein preferably the changeover section (82; 182; 282) of at least one connecting conductor section (80; 180; 280) extends on both sides of the - relative to the sequence axis (F) - axial longitudinal middle (LM) of the axial distance (AA) between the single conductor coil pairs (70; 170; 270) connected directly by the connecting conductor section (80; 180; 280).

6. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to one of the preceding claims, Characterized in that the at least one single conductor coil pair (70; 170; 270) is accommodated in a coil housing (12; 112; 212), where in the coil housing (12; 112; 212) for each single conductor coil pair (70; 170; 270) out of a plurality of single conductor coil pairs (70; 170; 270) there is configured one accommodating cavity (60; 160; 260) in which the single conductor coil pair (70; 170; 270) assigned to the accommodating cavity (60; 160; 260) is accommodated, wherein preferably the coil housing (12; 112; 212) comprises two housing components (12a, 12b; 112b; 212b) which connected with each other form the coil housing (12; 112; 212), where of each accommodating cavity (60; 160; 260) one part is configured as a recess (60a) in the one housing component (12a) and another part as a recess (60b; 160b; 260b) in the other housing component (12b; 112b; 212b), where the two parts of one and the same accommodating cavity (60; 160; 260) configured in different housing components (12a, 12b; 112b; 212b) differ in size, in particular reach to different depths into the two housing components (12a, 12b; 112b; 212b) from the joint plane which is common to them in the connected state and is preferably orthogonal to the parallel coil pair winding axes (PW).

7. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to Claim 6, taking into account Claim 5, Characterized in that the coil housing (12; 112; 212) exhibits a coil region (20; 120; 220), in which the accommodating cavities (60; 160; 260) that accommodate the single conductor coil pairs (70; 170; 270) are arranged, and a connection area (22; 122; 222) adjacent to the coil region (20; 120; 220) in which the connecting conductor sections (80; 180; 280) are arranged, where preferably all the accommodating cavities (60; 160; 260) are located on the same side of the connection area (22; 122; 222).

8. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111) according to one of the Claims 6 to 7, Characterized in that in the coil housing (12; 112) at least one cooling duct (88; 188) is configured into each of which at least one section of every single conductor coil pair (70; 170) from the number of single conductor coil pairs (70; 170) protrudes, such that the protruding sections are wettable by a cooling medium flowing through the cooling duct (88; 188), wherein preferably the accommodating cavities (60; 160) form a section of at least one cooling duct (88; 188), wherein particularly preferably a plurality of accommodating cavities (60; 160) are connected with each other by a flow duct (90; 190), through which the cooling medium can flow from an accommodating cavity (60; 160) into an accommodating cavity (60; 160) following it along the sequence axis (F).

9. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111) according to Claim 8, Characterized in that a single conductor coil pair (70; 170) is connected to a wall of the annular accommodating cavity (60; 160) accommodating it in such an only locally firmly bonded manner that the firmly bonded connection allows flow of cooling medium from a flow duct (90; 90) supplying cooling medium to the accommodating cavity (60; 160) to a flow duct (90; 190) discharging cooling medium away from the accommodating cavity (60; 160) in only one flow direction along the annular accommodating cavity (60; 160).

10. Linear motor stator (10; 110; 210) with a conductive winding arrangement (111) according to Claim 8, taking into account one of the Claims 4 to 5, Characterized in that in the flow duct (190) connecting accommodating cavities (160) with each other there is accommodated at least one connecting conductor section (180), preferably a plurality of connecting conductor sections (180).

11. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to one of the Claims 6 to 10, Characterized in that the coil housing (12; 112; 212) exhibits mounting formations (16; 116; 216), in particular through-holes (16; 116; 216) penetrating through the coil housing (12; 112; 212), by means of which the coil housing (12; 112; 212) can be connected, preferably detachably, with a supporting structure (T).

12. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11; 111; 211) according to Claim 11, taking into account Claim 7, Characterized in that at least one part of the mounting formations (16; 116; 216) is arranged and / or configured in the connection area (22; 122; 222), wherein preferably at least some of the mounting formations (16; 116; 216) comprise through-holes (16; 116; 216) penetrating through the coil housing (12; 112; 212), where each of the through-holes (16; 116; 216) is arranged in a window region (81; 181; 281) surrounded by connecting conductor sections (80; 180; 280).

13. Linear motor stator (10; 110; 210) with a conductive winding arrangement (211) according to one of the Claims 6 to 12, Characterized in that in the coil housing (212) at least one sensor recess (296, 298) is configured for accommodating a sensor, such as for example a temperature sensor.

14. Linear motor stator (10; 110; 210) with a conductive winding arrangement (11) according to one of the Claims 6 to 13, Characterized in that it comprises a probe housing (30), in which a probe (32), in particular a magnetic field-sensitive probe (32), is accommodated, where the probe housing (30) is connected with the coil housing (12), wherein preferably the probe housing (30) is connected as per intended use detachably with the coil housing (12), where preferably at the probe housing (30) there are configured fastening formations (36) which can be made to engage with fastening counter-formations (40) configured at the coil housing (12) for connecting the coil housing (12) and the probe housing (30).