SYSTEM FOR GENERATING ELECTRIC ENERGY IN A LINEAR MOTION DEVICE

Description

Technical field

[0001] The present invention relates to a system for generating electrical energy in a linear motion device comprising a first device component and a second device component, wherein the second device component is supported on the first device component by means of rolling elements, such that the second device component is linearly movable relative to the first device component. Furthermore, the present invention also relates to a linear motion device equipped with such a system, such as a profile rail guide with rolling elements arranged between a first device component and a second device component movable relative to the first device component. State of the art

[0002] A linear motion device is a mechanical system designed to achieve linear motion with minimized friction and high precision. This device combines a (for example, stationary) first device component with a second device component that is movable relative to the first device component, whereby the specific properties and characteristics of these two components are variable.

[0003] In one embodiment of a linear motion device designed as a profile rail guide, the first device component consists, for example, of a metallic guide rail. Depending on the specific design and technical requirements, this rail can have different profiles. It functions as a robust sliding and reference surface for the guide carriage. In the case of the profile rail guide, the guide carriage, which is also alternatively referred to as a guide slide, moves along the guide rail. It therefore forms a movable device component. Depending on its specific design, this guide carriage can take on different shapes and be used for various purposes, such as transporting loads.

[0004] An alternative embodiment of a linear motion device is the ball screw drive, in which a precision-manufactured spindle with a special spiral profile serves as the stationary device component. The spindle functions as both a guide and a drive element for a movable device component, the spindle nut.

[0005] In such a ball screw drive, which represents an efficient method for converting rotary motion into linear motion, the screw nut corresponds to the profile of the screw and moves linearly along this profile as the screw rotates.

[0006] A characteristic feature of many such linear motion devices is the integration of rolling elements. These can be implemented as balls or rollers and are strategically positioned between the moving and stationary device components to effectively reduce friction. In profile rail guides, the rolling elements roll between the guide carriage and the guide rail, whereas in ball screw drives, they operate between the threads of the spindle and spindle nut to transform rotational motion into linear motion.

[0007] Many modern linear motion applications utilize sensors, which can be mounted, for example, on a moving component such as the carriage of a profile rail guide. These sensors typically require electrical power. To supply electrical power to sensors mounted on a carriage, it is common practice to provide energy from an external power source via a cable connected to the carriage. This is disadvantageous, as such cable connections are often expensive and prone to failure. Alternatively, batteries mounted on the carriage can power the sensors, eliminating the need for a cable connection to an external power source. This is disadvantageous, however, as the batteries need to be replaced periodically.

[0008] "Energy harvesting" refers to the process of extracting energy from external sources and converting it into a usable form. This concept has gained importance in many areas of technology in recent years, particularly with regard to creating sustainable and energy-efficient solutions. There are compelling reasons for energy harvesting solutions, especially for linear motion devices such as profile rail guides, ball screws, and other mechanical systems that play a crucial role in automation and precision engineering.

[0009] In battery-powered linear motion devices, energy harvesting can help extend battery life by utilizing additional energy sources. Many modern applications employ sensors distributed across numerous locations, such as on the moving device components (like guide carriages) of linear motion devices. These sensors require power, and in many cases, regularly replacing their batteries is impractical. Energy harvesters can address this issue. Various technologies are already under development or in use to convert and reuse the kinetic or thermal energy generated during the operation of a mechanical device into electrical energy.These include mechanisms such as friction wheels or pressure wheels, piezoelectric materials that generate electricity through mechanical pressure resulting from vibrations during operation, and thermoelectric generators (TEGs) that harvest electrical energy from temperature differences – such as between the carriage and its surroundings. However, in linear motion devices, these techniques are often not sufficiently effective to generate significant amounts of energy.

[0010] Document US7126233 B2 refers to a system for generating electrical energy.

[0011] The documents DE102017212448 A1, CN101898517 A, EP1134444 B1 relate to linear motion devices. Summary of the invention

[0012] The object of the present invention is therefore to overcome the disadvantages of the solutions described above and to provide a system for generating electrical energy in a linear motion device and a linear motion device equipped with such a system, which enable efficient, flexible and cost-effective energy harvesting.

[0013] The aforementioned problem is solved according to the present invention by a system for generating electrical energy in a linear motion device with the features of claim 1 and by a linear motion device with the features of claim 35.

[0014] The system for generating electrical energy is designed for a linear motion device which has a first device component and a second device component, wherein the second device component is supported on the first device component by rolling elements, so that the second device component is linearly movable relative to the first device component and the rolling elements move during operation of the linear motion device when the second device component moves relative to the first device component and relative to the second device component.

[0015] According to the invention, the system for generating electrical energy comprises: the rolling elements which are movable along a direction of motion during operation of the linear motion device; a device for generating a static magnetic field in a spatial region which the rolling elements must successively traverse during operation of the linear motion device when moving along the direction of motion, wherein the rolling elements consist of a magnetically permeable material such that the rolling elements are suitable for influencing the magnetic field depending on the position of the rolling elements in that spatial region; and at least one induction coil with at least one coil turn, wherein the at least one induction coil is arranged in a stationary position relative to the device for generating a static magnetic field such that the induction coil (orthe at least one coil turn) experiences a change in magnetic flux due to a change in the position of the rolling elements during a movement of the rolling elements along the direction of movement through the one spatial region, which induces an electrical voltage in the at least one coil turn.

[0016] The system according to the invention for generating electrical energy in a linear motion device offers several advantages.

[0017] The system directly converts the mechanical energy generated by the movement of the second device component (e.g., a guide carriage or slide of a profile rail guide) along the first device component (e.g., a guide rail of the profile rail guide) into electrical energy. This enables efficient use of the available kinetic energy.

[0018] The recovered electrical energy can be used to power electrical devices such as sensors, processors, or communication interfaces located on the moving device component (e.g., guide carriage or slide). This can reduce or even eliminate the need for external energy sources.

[0019] The generated electrical energy can be collected and stored in an energy storage system, making it available when needed. This can extend the lifespan of battery-powered systems or reduce the need for regular battery replacements.

[0020] The system can be directly integrated into existing linear motion devices such as profile rail guides or ball screw drives (ball recirculating spindles).

[0021] No additional moving parts are required, which increases reliability and durability.

[0022] The rolling elements themselves do not need to be permanently magnetized. They merely need to be made of a magnetically permeable material that reacts to an external magnetic field provided by the device for generating a static magnetic field in such a way that each rolling element influences the provided magnetic field in its vicinity, for example, with regard to the spatial orientation of the field lines or the field strength. This results in a magnetic field in the vicinity of the rolling elements whose direction and / or field strength depend on the current position of the respective rolling elements. Consequently, when the rolling elements move relative to the induction coil (i.e.,(during a movement of the first device component relative to the second device component) a change in the magnetic flux, which induces an electrical voltage in the at least one coil turn of the induction coil by electromagnetic induction.

[0023] The use of rolling elements made of soft magnetic materials (e.g., steel) achieves a high relative magnetic permeability. This increases the efficiency of energy conversion, as the rolling elements effectively influence the spatial distribution of the magnetic field lines.

[0024] During movement of the second device component (e.g., guide carriage or slide) relative to the first device component, an electrical voltage is periodically induced in the induction coil by electromagnetic induction. This can be useful for applications that require or can utilize such a periodic energy source.

[0025] As can be seen from the accompanying drawings, there are several embodiments that differ in the design of the magnetic field generation and the arrangement of the induction coil. This gives the developers a high degree of flexibility in adapting to specific applications or design requirements.

[0026] According to a preferred embodiment of the system according to the invention, the device for generating a static magnetic field is formed by a permanent magnet made of hard magnetic material.

[0027] The use of a permanent magnet made of hard magnetic material in the preferred embodiment offers several advantages. For example, a permanent magnet made of hard magnetic material ensures a constant and stable magnetic field that is not affected by external influences or by the arrangement of the rolling elements. Permanent magnets made of hard magnetic material have a long service life and lose magnetic force only very slowly over time. Since the magnetic field is generated by the permanent magnet, no external energy source is required for the system to operate.

[0028] According to a further development of this preferred embodiment, the permanent magnet is essentially U-shaped, with its two ends having different magnetic polarities, and the space between these two ends is traversed by magnetic field lines of the static magnetic field and is designed to be crossed by the rolling elements during operation of the linear motion device.

[0029] Thanks to the U-shaped design of the permanent magnet, the magnetic field lines are concentrated between its two ends. This special arrangement results in a large Part The magnetic flux of the magnetic field generated by the permanent magnet is concentrated in the rolling elements. This ensures optimized use of the magnetic field.

[0030] The rolling elements can be used in both spherical and cylindrical forms, offering flexibility in design. Depending on the position of the rolling elements, the orientation of the magnetic field lines changes, resulting in varying magnetic field strengths and distributions. This property can be used to control and modulate the magnetic field. Because the permanent magnet is made of a hard magnetic material, the orientation of the field lines inside the magnet is not, or only minimally, affected by the position of the rolling elements. This ensures consistent system performance.

[0031] In an alternative preferred embodiment of the system according to the invention, the device for generating a static magnetic field is formed by a magnetized body and comprises: a permanent magnet made of hard magnetic material with opposite ends of different magnetic polarity; and two flux guides, wherein a first end section of a first flux guide is connected to one end of the permanent magnet and a first end section of a second flux guide is connected to an opposite end of the permanent magnet.

[0032] This alternative embodiment differs from the previous embodiment and its further development by the addition of flux guides. These flux guides, which consist of a soft magnetic material with high relative magnetic permeability, play a crucial role in manipulating and controlling the magnetic field generated by the permanent magnet.

[0033] The main advantage of this alternative embodiment compared to the embodiment with a permanent magnet (without flux guides) lies in the improved possibilities for controlling and manipulating the magnetic flux, particularly with regard to the induction coil. The flux guides offer, in particular, the possibility of adjusting the magnetic field, especially with respect to the spatial distribution of the field lines and the field strength, by appropriately selecting the shape of the respective flux guides and the relative magnetic permeability of the material of the flux guides, depending on the respective arrangement of the permanent magnet, the rolling elements, and the induction coil relative to each other.

[0034] Consequently, this alternative embodiment offers improved magnetic field control and maximum induced voltages while minimizing potential energy losses (especially those caused by the generation of eddy currents in a flux guide during movement of the rolling elements relative to the respective flux guide), particularly when the flux guides are configured as a laminated core (i.e., a stacked arrangement of multiple thin, electrically insulated sheets or foils of soft magnetic material), which is suitable for preventing the formation of eddy currents in a flux guide during movement of the rolling elements. This makes this alternative embodiment highly efficient and particularly powerful.

[0035] According to a preferred embodiment of the above-described design, a pole shoe made of soft magnetic material can be arranged at the second end adjacent to at least one of the two flux guide pieces in order to optimize the spatial course of the magnetic field lines in the vicinity of the at least one induction coil.

[0036] By using a pole shoe made of a soft magnetic material, the spatial distribution of the magnetic field lines in the vicinity of the induction coil can be optimized. The main goal of this optimization is to maximize the electrical energy generated during the movement of the moving component of the linear motion device. This means that a greater proportion of the mechanical energy of the moving component is converted into electrical energy. The shape of the pole shoe and the relative magnetic permeability of the pole shoe material can be selected for optimization. The shape of the pole shoe can be varied depending on the shape of the rolling elements and the arrangement of the coil windings of the induction coil.

[0037] In a further alternative embodiment of the system according to the invention, the device for generating a static magnetic field comprises two U-shaped magnetized bodies, each consisting of a permanent magnet and an L-shaped flux guide, and which are spaced apart from each other and arranged in a mirror-symmetrical manner with respect to the direction of movement of the rolling elements, and wherein the rolling elements successively traverse the space between the two magnetized bodies, which is traversed by magnetic field lines of the static magnetic field, during the operation of the linear motion device.

[0038] The magnetic flux density in the space between the two magnetized bodies changes with the position of the rolling elements, allowing the magnetic field strength to be adjusted for specific applications. The changes in the position of the rolling elements and the associated changes in magnetic flux induce an electrical voltage in an induction coil, which is then used for energy generation and recovery.

[0039] Because the magnetic field lines run at least partially parallel to the direction of motion of the rolling elements, this alternative embodiment differs from the other embodiments and could be advantageous in certain applications where specific magnetic field-rolling element interactions are required. Overall, this alternative embodiment offers a promising approach to generating and controlling magnetic fields for rolling elements, particularly considering its high energy recovery potential.

[0040] In yet another alternative embodiment of the system according to the invention, the device for generating a static magnetic field comprises two identically designed magnetized bodies with an E-shaped profile, which are spaced apart from each other and arranged in a mirror-symmetrical manner with respect to the direction of movement of the rolling elements, wherein the E-shaped profile has three legs and a permanent magnet is attached to the middle leg, and wherein the rolling elements traverse the space between the two magnetized bodies, which is traversed by magnetic field lines of the static magnetic field, one after the other during the operation of the linear motion device.

[0041] The mirror-symmetrical arrangement of the two magnetized bodies with an E-shaped profile creates a uniform and consistent magnetic field in the space between them. This enables reliable interaction with the rolling elements passing through. Furthermore, the three-legged E-shaped profile allows for the generation of specific magnetic field configurations. The middle leg, containing the permanent magnet, can be used to generate an intense and centered magnetic field in the area of ​​rolling element movement.

[0042] Since the rolling elements traverse the space traversed by magnetic field lines one after the other during operation, a constant magnetic interaction can be ensured, which contributes to efficient energy generation or recovery.

[0043] A linear motion device according to the invention, comprising a first device component and a second device component, the second device component being supported on the first device component by means of rolling elements, such that the second device component is linearly movable relative to the first device component, has at least one system according to the invention for generating electrical energy, wherein the device for generating a static magnetic field and the at least one induction coil are arranged stationary relative to the first device component or stationary relative to the second device component.

[0044] The advantages of such a linear motion device according to the invention are obvious.

[0045] The linear motion device enables the conversion of mechanical energy generated during the movement of the moving device component (e.g., guide carriage or slide) into electrical energy. This is known as "energy harvesting".

[0046] The generated electrical energy can be stored directly in the first or second device component, on which the device for generating a static magnetic field and the at least one induction coil are stationary. This can help to autonomously power electrical devices or systems (e.g., sensors, processors, and communication interfaces) attached to this device component, thereby reducing or eliminating the need for external power sources or frequent battery changes.

[0047] The integration of the inventive system for generating electrical energy into the linear motion device enables a compact and efficient solution that requires no additional external devices or systems. Furthermore, various embodiments of this system exist, offering high flexibility for integration into different applications or configurations of linear motion devices.

[0048] Since the system according to the invention for generating electrical energy is mainly based on magnetic properties and induction, there are fewer moving parts that can wear out, resulting in a longer service life and lower maintenance requirements for the linear motion device.

[0049] The ability to recover and reuse energy can reduce energy consumption and thus the carbon footprint. Energy harvesting can reduce the need for external energy sources or regular battery changes, which can also lead to cost savings in the long run. Brief description of the drawings

[0050] Further advantages and features of the present invention will become apparent from the detailed description of several embodiments of the present invention with reference to the following drawings. Figures 1 to 4 show a first embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements ( Figures 1 and 3 ) and according to a top view cut perpendicular to the direction of movement of the rolling elements ( Figures 2 and 4 ) onto the section planes II-II and IV-IV of the Figures 1 and 3 . Figure 5shows a schematic block flow diagram of the conversion of mechanical energy into electrical energy and the subsequent storage and use of the electrical energy in a linear motion device according to the invention. Figures 6 to 9 show a second embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements ( Figures 6 and 8 ) and according to a top view cut perpendicular to the direction of movement of the rolling elements ( Figures 7 and 9 ) onto the section planes VII-VII and IX-IX of the Figures 6 and 8 . Figures 10 to 13 show a third embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements ( Figures 10 and 12 ) and according to a top view cut perpendicular to the direction of movement of the rolling elements ( Figures 11 and 13 ) on the section planes XI-XI and XIII-XIII of the Figures 10 and 12 . Figures 14 and 15 show a fourth embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements in different movement positions of the rolling elements. Figures 16 and 17 show a fifth embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements in different movement positions of the rolling elements. Figures 18 and 19 show a sixth embodiment of a system according to the invention for generating electrical energy in a linear motion device according to a side view cut parallel to the direction of movement of the rolling elements ( Figure 18 ) and according to a top view cut perpendicular to the direction of movement of the rolling elements ( Figure 19 ) to the section plane XIX-XIX of the Figure 18 . Detailed description of embodiments

[0051] The attached drawings show various versions of an innovative system for generating electrical energy for linear motion devices such as profile rail guides or spindle guides / ball screw drives.

[0052] A linear motion device typically has a first device component (guide component), often stationary, such as a guide rail in a profile rail guide or a spindle in a spindle guide or ball screw drive. A second device component (guide component), guided by the first guide device, such as a carriage in a profile rail guide or a spindle nut in a spindle guide or ball screw drive, moves along this first device component and is supported by rolling elements, such as rollers or balls, against the first device component.

[0053] The linear motion device can operate in various modes. With profile rail guides, especially recirculating ball guides, the balls or rollers move continuously in a rotary or circular motion along a closed path. They are typically used in applications where the load needs to be moved continuously in both directions without the need for a return mechanism.

[0054] The electrical energy generation system presented here can be attached, in particular, to the moving component of such linear motion devices. It comprises a device PM, MK1, MK2, MK3 that generates a static magnetic field and defines a spatial region RB through which the rolling elements WK (rollers or balls) must move during operation of the linear motion device when the first device component moves relative to the second device component. These rolling elements WK are made of a magnetically permeable material, for example, a soft magnetic material with high magnetic permeability; that is, they influence the path of the magnetic field lines FL of the static magnetic field.

[0055] If the second device component moves along the first device component, the magnetic field near the rolling elements WK (rollers or balls) changes depending on their current position relative to the respective device PM, MK1, MK2, MK3 for generating the static magnetic field.

[0056] In addition to the device PM, MK1, MK2, MK3 for generating the static magnetic field, at least one induction coil IS, IS1, IS2 with at least one coil turn is provided, arranged at a predetermined position (i.e., stationary) relative to the respective device PM, MK1, MK2, MK3 for generating the static magnetic field. This induction coil IS, IS1, IS2 is further arranged such that changes in the magnetic field caused by a movement of the second device component relative to the first device component result in a change in the magnetic flux in the induction coil IS, IS1, IS2 over time. Faraday's law of induction states that these changes in magnetic flux induce an electrical voltage Uind in the induction coil IS, IS1, IS2.

[0057] During the movement of the linear motion device, the induction coil IS, IS1, IS2 generates an electrical voltage that changes with the rate of change of the magnetic flux. This voltage can be converted into a DC voltage using conventional electronic components, and the generated electrical energy can be stored in an energy storage device ES (see Fig. 5 ).

[0058] In this process, often referred to as "energy harvesting," the mechanical energy of the moving device component is converted into electrical energy and stored. This stored electrical energy can be used to power electrical devices such as sensors S1, S2, processors, and communication interfaces KS that are attached to the moving device component (see Fig. 5 ).

[0059] The accompanying drawings are schematic representations illustrating the relevant technical effects. In particular, the depicted paths of the magnetic field lines are schematic and not precisely calculated.

[0060] There are various embodiments that differ in the construction of the device PM, MK1, MK2, MK3 for generating the static magnetic field, in the spatial extent of the magnetic field lines in relation to the direction of movement BR of the rolling elements WK (rollers or balls) and in the arrangement of the induction coil(s) IS, IS1, IS2.

[0061] Figs. 1 to 4 The figures show various views of a first embodiment of the system according to the invention for generating electrical energy in a linear motion device. The views show different operating states with different arrangements of the rolling elements WK relative to the device PM for generating a static magnetic field.

[0062] In these figures, the rolling elements WK are represented as spheres, but rollers can also be used as rolling elements WK (see Fig. 19 ).

[0063] In this case, the PM device for generating a static magnetic field consists of a single permanent magnet PM, which is essentially U-shaped and has different magnetic poles at its two ends.

[0064] The magnetic field lines FL run in the spatial region RB between the ends of the permanent magnet PM in such a way that the total energy of the magnetic field is minimized. This results in a significant portion of the magnetic flux generated by the permanent magnet PM being concentrated in the rolling elements WK. Each individual rolling element WK has a corresponding magnetization that corresponds to the spatial distribution of the magnetic field.

[0065] It is important that the arrangement of the rolling elements WK relative to the permanent magnet PM has no or only a slight influence on the course of the magnetic field lines FL in the permanent magnet PM, since it is made of hard magnetic material.

[0066] Figs. 1 to 4 The magnetic field lines FL inside the rolling elements WK are shown, which run essentially perpendicular to the direction of movement BR of the rolling elements WK.

[0067] In this embodiment, an induction coil IS is arranged in the space RB between the two ends of the permanent magnet PM, which is traversed by the magnetic field lines FL and the rolling elements WL. More precisely, this induction coil IS is arranged in a region between one end of the permanent magnet PM and the region that the rolling elements WK successively traverse when the movable second device component moves along the first device component.

[0068] The induction coil IS consists of one or more coil turns, each extending in a ring shape around a central axis that is essentially perpendicular to the direction of motion BR of the rolling elements WK. This means that each coil turn of the induction coil IS encloses an area that is essentially parallel to the direction of motion BR of the rolling elements WK.

[0069] At the in Figs. 1 and 2 In the depicted rolling element arrangement, the magnetic field in the area between the two ends of the permanent magnet PM is concentrated on the volume of a single rolling element WK. As a result, the magnetic flux associated with one coil turn of the induction coil IS is relatively large.

[0070] At the in Figs. 3 and 4In the depicted rolling element arrangement, the course of the magnetic field lines FL was modified such that the magnetic field in the spatial region RB between the two ends of the permanent magnet PM is distributed over the volume of two consecutive rolling elements WK. This results in the magnetic flux associated with one coil turn of the induction coil IS being distributed relative to Figs. 1 and 2 significantly reduced.

[0071] A change in the position of the rolling elements WK from the arrangement to Figs. 1 and 2 for the order according Figs. 3 and 4 This causes a change in magnetic flux in the area of ​​the induction coil IS. This change in magnetic flux induces an electrical voltage Uind in the coil windings of the induction coil IS, as represented by the symbol "~" for alternating voltage at the winding ends of the induction coil IS.

[0072] Fig. 5schematically shows the process of converting mechanical into electrical energy, which in the linear motion device according to the invention, here in the Fig. 5 The illustrated profile rail guide 10 comprises a guide carriage 20 and a guide rail 15. In this example, the guide carriage 20 of the profile rail guide 10 is linearly movable in the longitudinal direction of the guide rail 15 and includes a base body 21 and two end caps 22, which are attached to the two front surfaces of the base body 21 opposite each other in the longitudinal direction of the guide rail 15.

[0073] In the present example, the guide carriage 20 of the profile rail guide 10 is supported on the guide rail 15 by a plurality of rolling elements WK. The rolling elements WK are arranged in several rolling element circulation channels formed on the guide carriage 20, each extending along an annular closed curve. Accordingly, when the guide carriage 20 moves longitudinally along the guide rail 15, the rolling elements WK circulate along annular closed paths. Two sections of each of these annular closed paths extend along the longitudinal direction of the guide rail 15 on or through the base body 21, and two other sections of each of these annular closed paths extend through the two end caps 22. (The spatial extent of these closed paths of the rolling elements WK is shown in...) Fig. 5 (not shown).

[0074] The process of converting mechanical energy into electrical energy proceeds in the example according to Fig. 5 It consists of several key components: First, the linear motion device, i.e., in the example according to Fig. 5 Mechanical energy is generated in the profile rail guide 10. For this purpose, the guide carriage 20 is moved in the longitudinal direction of the guide rail 15 (as shown in Fig. 5 (indicated by a double arrow placed near the guide carriage 20). This energy is then transferred to an "energy converter" EW, which corresponds to the inventive system for generating electrical energy. The core component of this energy converter EW is the arrangement of a device for generating the static magnetic field, i.e., in the present example, one located in the Figs. 1-4 permanent magnets PM shown, in combination with a Figs. 1-4The depicted induction coil IS, in which a voltage Uind is induced when the guide carriage 20 moves in the longitudinal direction of the guide rail 15. The generation of this voltage Uind is based on the principle that when rolling elements WK of the profile rail guide 10 are moved relative to the device PM to generate a static magnetic field, thereby causing a change in magnetic flux in the induction coil IS, electrical energy is generated.

[0075] To make this induced voltage Uind usable for electronic devices, it must first be rectified. This is done using a rectifier GR, which converts the alternating voltage into a direct voltage. The resulting direct voltage is then stored in an energy storage device ES. Various components can serve as the energy storage device ES, such as a capacitor or a battery.

[0076] Finally, the stored energy is used to power various electronic components, such as a DC / DC converter (GSW) and a microprocessor (MP), which can be powered via the DC / DC converter. This particular system in Fig. 5 The diagram shows components such as sensor S1 and sensor S2, which can be used to acquire specific data. It also includes a wireless communication interface KS. This can be used to wirelessly transmit the data acquired by sensors S1 and S2 to other systems or devices. Fig. 5 As indicated, the sensors S1, S2 and the wireless communication interface KS can be connected to the microprocessor MP to enable data transmission.

[0077] In the example according to Fig. 5The energy converter EW, consisting of the PM for generating a static magnetic field and the IS induction coil, can, for example, be arranged stationary on the guide carriage 20, such that the energy converter EW moves along with the guide carriage 20 when the guide carriage 20 moves along the guide rail 15. The energy converter EW can be installed near an orbit of the rolling elements WK, for example, on the base body 21 or in a recess formed in the base body 21, or on one of the end caps 22 or in a recess formed in one of the end caps 22 (in Fig. 5 (not shown). Accordingly, the remaining in Fig. 5 The electronic components shown (rectifier GR, energy storage ES, DC / DC converter GSW, microprocessor MP, sensor S1, sensor S2, wireless communication interface KS) are arranged stationary on the guide carriage 20 or are integrated into the guide carriage 20.

[0078] The energy converter EW can form a compact unit with one or more of the aforementioned electronic components (e.g., the rectifier GR, energy storage device ES, one or more sensors S1 and / or S2), which can, for example, be implemented on a single carrier or in a single housing. Advantageously, such a unit as a whole can be installed near an orbit of the rolling elements WK, for example, on the base body 21 or in a recess formed in the base body 21, or on one of the end caps 22 or in a recess formed in one of the end caps 22 (in Fig. 5 (not shown).

[0079] Overall, this gives Fig. 5a clear overview of the process of energy conversion and utilization in a specific technical system according to the present invention with the aim of efficiently converting mechanical motion in a linear motion device into electrical energy and making this usable for various electronic applications.

[0080] Figs. 6 to 9 shown are various views of a second embodiment of the system according to the invention for generating electrical energy in a linear motion device. These views are similar to those of the Figs. 1 to 4 and show different perspectives and arrangements of the rolling elements WK in relation to the device MK1 for generating a static magnetic field.

[0081] The second embodiment differs from the first essentially in that the permanent magnet PM is replaced by a magnetized body. This magnetized body, designated MK1, consists of a permanent magnet PM1 and two flux guides FLS1 and FLS2. The permanent magnet PM1 is a homogeneously magnetized cuboid made of hard magnetic material, exhibiting opposite magnetic poles at its opposite ends. The two flux guides FLS1 and FLS2 are made of soft magnetic material with high relative magnetic permeability and high saturation magnetization and are magnetized by the magnetic field generated by the permanent magnet PM1.

[0082] In this second embodiment, the rolling elements WK (in this case, balls) are arranged such that, when the movable device component (e.g., the guide carriage or slide) moves along the stationary device component (e.g., the guide rail), they must traverse a spatial region RB between the two ends of the flux guide pieces FLS1 and FLS2. The arrangement of the permanent magnet PM1, the flux guide pieces FLS1 and FLS2, and the rolling elements WK causes the magnetic field lines FL in the region of these elements to follow closed, essentially ring-shaped curves.

[0083] Figs. 6 and 8 The second embodiment is shown from the same perspective, namely viewed perpendicular to the direction of movement BR of the rolling elements WK. Fig. 8 However, it shows an operating condition in which the rolling elements WK are in a different position compared to the operating condition after Fig. 6are offset in the direction of movement BR by a distance that corresponds approximately to the radius of a rolling element WK.

[0084] Fig. 7 shows the same rolling element arrangement as Fig. 6 , however parallel to the direction of movement BR in top view of plane VII-VII of Fig. 6 considered. Fig. 9 shows the same rolling element arrangement as Fig. 8 , however also parallel to the direction of movement BR in top view onto plane IX-IX of Fig. 8 considered.

[0085] The magnetic field lines FL inside the rolling elements WK also run according to the embodiment shown. Figs. 6 to 9 essentially perpendicular to the direction of movement BR of the rolling elements WK.

[0086] In this second embodiment, an induction coil IS is also arranged in a spatial region RB between the free end of one flux guide piece FLS1 and the free end of the other flux guide piece FLS2. More precisely, the induction coil IS is located in a region between one end of a flux guide piece FLS1 and a region in the space between the ends of the two flux guide pieces FLS1 and FLS2, which the rolling elements WK traverse successively when the movable device component is moved along the stationary device component. The induction coil IS is similar to that in the first embodiment and consists of one or more coil windings extending annularly around a central axis of the induction coil IS, which is oriented substantially perpendicular to the direction of movement BR of the rolling elements WK.

[0087] At the in Figs. 6 and 7In the depicted operating state, the rolling element arrangement is such that the generated static magnetic field is concentrated in the area between the second end (facing away from permanent magnet PM1) of one flux guide FLS1 and the second end (facing away from permanent magnet PM1) of the other flux guide FLS2, within the volume of a single rolling element WK. This results in a relatively large magnetic flux associated with one coil turn of the induction coil IS.

[0088] In the rolling element arrangement according to the operating state after Figs. 8 and 9The course of the magnetic field lines FL is modified such that the generated static magnetic field in the area between the second end (facing away from the permanent magnet PM1) of one flux guide piece FLS1 and the second end (facing away from the permanent magnet PM1) of the other flux guide piece FLS2 is distributed over the volume of two consecutive rolling elements WK. This results in a magnetic flux assigned to one coil turn of the induction coil IS being reduced compared to the flux in Figs. 6 and 7 The operating state shown is significantly reduced.

[0089] The change in the position of the rolling elements WK from the arrangement to Figs. 6 and 7 for the order according Figs. 8 and 9 Conversely, a change in the magnetic flux in the area of ​​the induction coil IS causes an electrical voltage to induce an alternating voltage in the windings of the induction coil IS, which is represented by the symbol "~" for alternating voltage at the winding ends of the induction coil IS.

[0090] In summary, the second embodiment differs according to Figs. 6 to 9 The difference from the first embodiment is primarily due to the presence of the flux guides FLS1 and FLS2. These flux guides FLS1 and FLS2 enable a greater change in magnetic flux and thus a higher induced voltage Uind during the transition of the rolling elements WK between the two arrangements. To minimize energy losses that could be caused by the generation of eddy currents in one of the flux guides FLS1 and FLS2 during movement of the rolling elements relative to the respective flux guide FLS1 or FLS2, the flux guides FLS1 and FLS2 can advantageously each be designed as laminated cores made of a soft magnetic material.

[0091] Materials suitable as soft magnetic materials for the flux guide pieces FLS1 and FLS2 are those which have a high relative magnetic permeability, a low coercive field strength and a high saturation magnetization (such as NiFe, SiFe or CoFe alloys).

[0092] Figs. 10 to 13 Figures 1 and 2 show various views of a third embodiment of a system according to the invention for generating electrical energy in a linear motion device. This embodiment is essentially similar to the one shown in Figure 3. Figs. 6 to 9 the second embodiment shown. However, a significant difference is that at the second end (facing away from the permanent magnet PM1) of one of the two flux guide pieces FLS1, which is located near the induction coil IS, a so-called pole shoe PS made of a soft magnetic material is formed.

[0093] The pole shoe PS enables targeted modification and control of the magnetic field near the induction coil IS. The primary goal of this modification and control is to increase the electrical energy generated by the movement of the moving component of the linear motion device. In other words, the efficiency of converting the mechanical energy of the moving component into electrical energy is to be maximized.

[0094] The shape of the pole shoe PS and the magnetic permeability of the pole shoe material used can be carefully selected to achieve this goal. In particular, the geometry of the pole shoe PS can be designed depending on the geometry of the rolling elements WK (e.g., balls or rollers) and the arrangement of the coil windings of the induction coil IS.

[0095] To ensure maximum energy conversion from the mechanical energy of the linear motion device into the generated electrical energy, the magnetic field around the induction coil IS must be optimized by the pole shoe PS so that during the Figs. 10 and 11 In the illustrated arrangement of the rolling elements WK, the magnetic flux assigned to one coil turn of the induction coil IS is at its maximum and in the Figs. 12 and 13 In the depicted arrangement of the rolling elements WK, this magnetic flux is minimal.

[0096] The special design of the third embodiment according to Figs. 10 to 13This optimization is made possible by the fact that the pole shoe PS has a convexly curved, i.e., outwardly curved, surface on the side facing the induction coil IS. Furthermore, this pole shoe PS is arranged symmetrically to an extension of the central axis of the induction coil IS. This central axis is defined as a line passing perpendicularly through the center point of the area defined by a coil turn of the induction coil IS.

[0097] This special design of the pole shoe PS controls the magnetic flux in the rolling elements WK in such a way that it is arranged according to the rolling element arrangement. Figs. 12 and 13 is particularly low, which is also due to the convexly curved surface of the PS pole shoe.

[0098] The result of this optimization is that when the rolling elements WK move between the in Figs. 10 and 11 on the one hand and in Figs. 12 and 13On the other hand, at the positions shown, a significant change in magnetic flux occurs. This leads to a high induced voltage Uind.

[0099] In Figs. 14 and 15 A fourth embodiment of the system according to the invention for generating electrical energy in a linear motion device is shown, wherein in each side view with a viewing direction perpendicular to the direction of movement BR of the rolling elements WK two different arrangements of the rolling elements WK with respect to the device MK2, MK3 for generating a static magnetic field are shown.

[0100] The device used in this embodiment for generating a static magnetic field consists of two identical, essentially U-shaped magnetized bodies MK2 and MK3. Each of these magnetized bodies MK2 and MK3 comprises a permanent magnet PM2 and an L-shaped flux guide FLS3 made of soft magnetic material. The flux guide FLS3 is connected at one end to an end face of the permanent magnet PM2 and is thus magnetized by the permanent magnet PM2. An opposite end of the flux guide FLS3 forms the second leg of the U-shaped magnetized body MK2 and MK3.

[0101] The two magnetized bodies MK2 and MK3 are arranged at a distance from each other on opposite sides of the space RB, which the rolling elements WK traverse successively in the direction of movement BR when one movable device component (e.g., guide carriage or slide) is moved longitudinally to the other device component (e.g., guide rail). This arrangement is a mirror image of the direction of movement BR of the rolling elements WK, as shown in Figs. 14 and 15 This is shown. In this case, the rollers are used as rolling elements (WK), and Figs. 14 and 15 Each roller shows a side view parallel to its longitudinal axis.

[0102] The two magnetized bodies MK2 and MK3 extend in the direction of motion BR of the rolling elements WK and have an extent that corresponds approximately to the diameter of the rolling elements WK with respect to the direction of motion BR.

[0103] Fig. 14Figure 1 shows an operating state in which the rolling elements WK are arranged in the direction of motion BR such that one of two consecutive rolling elements WK lies in a space between the permanent magnets PM2 of the magnet bodies MK2 and MK3. The other of the two consecutive rolling elements WK is simultaneously located in a space between one end of the second leg of the magnetized body MK2, formed by the flux guide FLS3, and one end of the second leg of the magnetized body MK3, which is also formed by the flux guide FLS3.

[0104] In operating condition after Fig. 15 Are the rolling elements WK in relation to the arrangement in the operating state according to Fig. 14 offset in the direction of movement BR by approximately half the rolling element diameter.

[0105] In each case, the two magnetized bodies MK2 and MK3 are spaced apart relative to each other and arranged symmetrically to the direction of motion BR of the rolling elements WK, and their permanent magnets PM2 are aligned such that the magnetizations of the permanent magnets PM2 of the two magnetized bodies MK2 and MK3 are perpendicular to the direction of motion BR of the rolling elements WK. The magnetizations of the permanent magnet PM2 of one magnetized body MK2 and the permanent magnet PM2 of the other magnetized body MK3 are oriented in opposite directions, with the polarities in Figs. 14 to 19 each is indicated with "S" for "South Pole" and "N" for "North Pole".

[0106] The two magnetized bodies MK2 and MK3 thus generate a magnetic field in the spatial region RB, which the rolling elements WK must traverse successively when one movable device component of the linear motion device moves in the longitudinal direction of the other device component of the linear motion device. Fig. 13 and 14 (represented by dashed lines) field lines FL in contrast to the previous embodiments of the Figs. 1 to 13 at least partially parallel to the direction of movement BR of the rolling elements WK.

[0107] In the rolling element arrangement according to Fig. 14The rolling elements WK between the magnetized bodies MK2 and MK3 are relatively strongly magnetized because they are located precisely in a space between the permanent magnets PM2 and between the free legs of the magnetized flux guides FLS2 and FLS3. This results in a relatively high magnetic flux density in the space between the two magnetized bodies MK2 and MK3, as shown in Fig. 14 depicted.

[0108] In operating condition after Fig. 15In contrast, the rolling elements WK are arranged such that both the permanent magnets PM2 of the magnetized bodies MK2 and MK3 and the free legs of the flux guides FLS2 and FLS3 of the magnetized bodies MK2 and MK3 are in an "intermediate position" between two successive rolling elements WK. With this arrangement, the magnetic field generated by the permanent magnets PM2 and transmitted by the flux guides FLS2 and FLS3 is distributed essentially over two successive rolling elements WK and their surroundings.

[0109] The two magnetized bodies MK2 and MK3 thus generate a magnetic field in both rolling element arrangements, the field lines FL of which run at least partially parallel to the direction of movement BR of the rolling elements WK.

[0110] As in Figs. 14 and 15 Indicated by dashed lines, the change in position of the rolling elements WK during the transition from the arrangement to Fig. 14 for the order according Fig. 15A change in the spatial orientation of the field lines FL with respect to the arrangement of the magnetized bodies MK2 and MK3 and the induction coil IS2, and thus a change in magnetic flux. This leads to the induction of an electrical voltage Uind in an induction coil IS2, whose central axis is collinear with the direction of motion BR of the rolling elements WK. The coil windings of the induction coil IS2 thus extend in a ring shape around the spatial region RB, which the rolling elements WK must traverse successively, as shown in Figs. 14 and 15 The coil windings of the induction coil IS2 are arranged in a space-saving manner between the two legs of the U-shaped magnetized bodies MK2 and MK3 (i.e., between the leg formed by the permanent magnet PM2 and the leg formed by the flux guide FLS2, FLS3).

[0111] Figs. 16 to 19show detailed illustrations of two further variants of the system according to the invention for generating electrical energy in a linear motion device, which are based on the preceding fourth embodiment according to Figs. 14 and 15 build up. These further variants are referred to here as the fifth embodiment ( Figs. 16 and 17 ) and sixth embodiment ( Figs. 18 and 19 ) designated.

[0112] In the fifth embodiment according to Figs. 16 and 17 A further constructive modification of the MK2, MK3 device for generating the static magnetic field is provided. While in Figs. 14 and 15 The fifth embodiment, in which two magnetized bodies MK2 and MK3 are used, each consisting of an L-shaped flux guide FLS3 and a permanent magnet PM2, features Figs. 16 and 17A change in the design of these magnetized bodies MK2 and MK3 is shown. Here, two identically designed magnetized bodies MK2 and MK3 are each depicted in a side view, viewed from a perspective perpendicular to the direction of motion BR of the rolling elements WK. The magnetized bodies MK2 and MK3 each have an E-shaped profile with a total of three legs spaced apart in the direction of motion BR. The middle leg of these E-shaped magnetized bodies MK2 and MK3 is formed on one side, facing the space RB traversed by the rolling elements WK, by a permanent magnet PM2.The remaining part of the magnetized bodies MK2 and MK3 is each formed by a flux guide piece FL2, FLS 3 with an E-shaped profile, wherein the length of the middle leg of the flux guide piece FLS2, FLS3 is shortened in a direction perpendicular to the direction of movement BR by a length corresponding to the length of the attached permanent magnet PM2.

[0113] Another significant difference of this fifth embodiment compared to Figs. 14 and 15 is the arrangement and number of induction coils. Instead of the one in Figs. 14 and 15 In this fifth embodiment, two separate induction coils IS1 and IS2 are used instead of the single induction coil IS2 shown. These two induction coils IS1 and IS2 are arranged one behind the other, viewed in the direction of movement BR of the rolling elements WK, and spaced apart from each other such that they are located on opposite sides of the permanent magnet PM2 attached to the middle leg.

[0114] Field lines FL of the magnetic field generated by the magnetized bodies MK2 and MK3 are in Figs. 16 and 17 The diagram is shown with dashed lines. As can be seen, the generated magnetic field in the region of induction coil IS1 is essentially parallel to the longitudinal axis of induction coil IS1 (or perpendicular to the area bounded by a coil turn of induction coil IS1). Similarly, the generated magnetic field in the region of induction coil IS2 is essentially parallel to the longitudinal axis of induction coil IS2 (or perpendicular to the area bounded by a coil turn of induction coil IS2).

[0115] The change in position of the rolling elements WK during the transition from the arrangement according to Fig. 16 for the order according Fig. 17This causes a change in the spatial course of the field lines FL with respect to the arrangement of the magnetized bodies MK2 and MK3 and the induction coils IS1 and IS2, and thus a change in magnetic flux in both the area of ​​the induction coil IS1 and in the area of ​​the induction coil IS2, so that due to the changes in magnetic flux in the area of ​​the induction coil IS1 and in the area of ​​the induction coil IS2, an electrical voltage is induced in both the respective coil windings of the induction coil IS1 and in the respective coil windings of the induction coil IS2.

[0116] In the fifth embodiment, significant changes were made to the design of the magnetized bodies MK2 and MK3, as well as to the arrangement and number of the induction coils IS1 and IS2. These modifications aim to optimize the system's functionality. A key feature of these changes is the bilateral arrangement of the induction coils IS1 and IS2 around the central permanent magnet PM2. This enables the detection of different polarities in the static magnetic field, which is influenced by the rolling elements WK. This can lead to more accurate and differentiated measurements by capturing the effect of the rolling elements WK on the magnetic field from various directions. The fifth embodiment thus aims to improve the system's sensitivity and precision with regard to the interaction between the rolling elements WK and the magnetic field.

[0117] The sixth embodiment according to Figs. 18 and 19is also based constructively on the fourth embodiment according to Figs. 14 and 15 However, an additional measure is taken here to further increase performance. A magnetic field concentrator MKO, made of a soft magnetic material with high relative magnetic permeability, is attached to the permanent magnets PM2 of the magnetized bodies MK2 and MK3 on the side facing the space traversed by the rolling elements WK. The purpose of this magnetic field concentrator MKO is to concentrate the magnetic field in the vicinity of the respective rolling element WK into the smallest possible space.

[0118] This change can be used to increase the magnetic field strength in the immediate vicinity of the respective rolling element WK, which in turn can improve the efficiency of energy generation. If the magnetic field near the respective rolling element WK is stronger, this can lead to a greater change in magnetic flux when this rolling element WK moves. This would in turn lead to a higher induced voltage Uind in the induction coil IS2, which would increase the efficiency of energy generation.

[0119] The sixth embodiment therefore aims to increase the system's performance through the use of magnetic field concentrators (MKO). These magnetic field concentrators (MKO) are intended to focus the magnetic field closer to the rolling elements (WK) to enable better detection of changes in magnetic flux.

[0120] In particular, the proposed system can be used as an innovative approach for the operation and monitoring of guide carriages in profile rail guides. Integrating the proposed system ("Energy Harvesters") directly into the guide carriage eliminates potential challenges related to power supply and cabling.

[0121] The main advantage of this system is that it enables the carriage to operate autonomously. The generated energy is used to power both sensors—which record important data such as the quantity and / or condition of lubricant used to lubricate the rolling elements, humidity, and / or temperature in the vicinity of the rolling elements—and a wireless data transmission device. This eliminates the need for an external power supply, which can be a significant advantage in many industrial applications, particularly in areas where cabling is problematic or expensive.

[0122] In particular, the possibility of providing an independent power supply for wireless data transmission is a significant advantage of the proposed system. Although WLAN and Bluetooth are common protocols, it is important to ensure the reliability and security of these connections at all times in industrial environments where interference or other challenges may occur.

[0123] The use of rectifiers (GR) and energy storage systems (ES) ensures that the generated energy is used and stored efficiently. This guarantees that the sensors and data transmission equipment are continuously supplied with the required energy.

[0124] In conclusion, the combination of the proposed energy generation system, sensor technology, and wireless data transmission in a linear motion device (e.g., profile rail guide or ball screw drive) has the potential to revolutionize how linear motion devices are used and monitored. It not only provides a self-sufficient energy source but also enables improved monitoring and data transmission, which can contribute to optimizing operations and enabling early problem detection.

Claims

1. A system for generating electrical energy in a linear motion device, which linear motion device (10) that has a first device component (15) and a second device component (20), wherein the second device component (20) is supported on the first device component (10) by means of rolling elements (WK) such that the second device component (20) is configured to be moveable linearly relative to the first device component (15) and the rolling elements (WK) move relative to the first device component and the second device component when the second device component carries out a movement relative to the first device component during the operation of the linear motion device (10), wherein the system for generating electrical energy comprises: - the rolling elements (WK) that are configured to be moveable along a direction of movement (BR) during the operation of the linear motion device; - an apparatus (PM, MK1, MK2, MK3) for generating a static magnetic field in a spatial region (RB), which the rolling elements (WK) have to successively traverse while moving along the direction of movement (BR) during the operation of the linear motion device, wherein the rolling elements (WK) consist of a magnetically permeable material such that the rolling elements (WK) are suitable for influencing the magnetic field in dependence on the position of the rolling elements (WK) in the one spatial region (RB); and - at least one induction coil (IS, IS1, IS2) with at least one coil winding, wherein the at least one induction coil (IS, IS1, IS2) is arranged stationarily relative to the apparatus (PM, MK1, MK2, MK3) for generating a static magnetic field in such a way that, due to a change in the position of the rolling elements (WK) during a movement of the rolling elements (WK) through the one spatial region (RB) along the direction of movement (BR), the induction coil experiences a change of a magnetic flux, which induces an electric voltage (Uind) in the at least one coil winding.

2. The system according to claim 1, wherein the rolling elements (WK) move along a closed path in a circulating manner or wherein the rolling elements (WK) move along a fixed path and return to their starting position at one end.

3. The system according to claim 1 or 2, wherein the rolling elements (WK) are realized in the form of balls or rollers.

4. The system according to one of preceding claims 1 to 3, wherein the apparatus (PM, MK1, MK2, MK3) for generating a static magnetic field is formed by a permanent magnet (PM) of hard magnetic material.

5. The system according to claim 4, wherein the permanent magnet (PM) essentially is realized in a U-shaped manner, wherein its two ends have different magnetic polarities, and wherein the space between these two ends is permeated by magnetic field lines (FL) of the static magnetic field and designed for being traversed by the rolling elements (WK) during the operation of the linear motion device (10).

6. The system according to one of preceding claims 1 to 3, wherein the apparatus for generating a static magnetic field is formed by a magnetized element (MK1) comprising: - a permanent magnet (PM1) of hard magnetic material with opposite ends of different magnetic polarity; and - two flux-conducting components (FLS1, FLS2), wherein a first end section of a first flux-conducting component (FLS1) is connected to one end of the permanent magnet (PM1) and a first end section of a second flux-conducting component (FLS2) is connected to an opposite end of the permanent magnet (PM1).

7. The system according to claim 6, wherein the two flux-conducting components (FLS1, FLS2) consist of a soft magnetic material with high relative magnetic permeability.

8. The system according to claim 6 or 7, wherein the magnetized element (MK1) essentially is realized in a U-shaped manner, and wherein the space between the second end of the one flux-conducting component (FLS1) and the second end of the other flux-conducting component (FLS2) is permeated by magnetic field lines (FL) of the static magnetic field and designed for being traversed by the rolling elements (WK) during the operation of the linear motion device.

9. The system according to claim 8, wherein the magnetic field lines (FL) extend along closed, essentially annular curves in the region of the permanent magnet (PM1), the two flux-conducting components (FLS1, FLS2) and the rolling elements (WK).

10. The system according to claim 8 or 9, wherein the flux-conducting components (FLS1, FLS2) are designed and arranged in such a way that the spatial progression of the magnetic field lines (FL) changes with the respective position of the rolling elements (WK) relative to the flux-conducting components (FLS1, FLS2).

11. The system according to one of preceding claims 8 to 10, wherein a pole shoe (PS) of soft magnetic material is arranged on the second end of at least one of the two flux-conducting components (FLS1, FLS2), which second end is located adjacent to the at least one induction coil (IS), in order to optimize the spatial progression of the magnetic field lines (FL) in the surroundings of the at least one induction coil (IS).

12. The system according to claim 11, wherein a pole shoe geometry and a relative magnetic permeability of the pole shoe material are optimized for ensuring a maximum energy conversion from the mechanical energy of the linear motion device into the generated electrical energy.

13. The system according to claim 11 or 12, wherein the pole shoe geometry is realized in dependence on the geometry of the rolling elements (WK) and the arrangement of the at least one winding of the induction coil (IS).

14. The system according to one of preceding claims 11 to 13, wherein the pole shoe (PS) has a convexly curved surface on the side facing the at least one induction coil (IS).

15. The system according to one of preceding claims 11 to 14, wherein the pole shoe (PS) is realized symmetrically to a central axis of the induction coil (IS).

16. The system according to one of preceding claims 5 and 8 to 15, wherein the magnetic field lines (FL) essentially extend perpendicular to the direction of movement (BR) of the rolling elements (WK).

17. The system according to one of preceding claims 1 to 16, wherein the at least one induction coil (IS) is arranged in or on the one spatial region (RB), which the rolling elements (WK) successively traverse in a movement along the direction of movement (BR) during operation of the linear motion device.

18. The system according to one of preceding claims 1 to 17, wherein the at least one induction coil (IS) has one or more coil windings that extend annularly around a central axis of the induction coil (IS).

19. The system according to claim 18, wherein the one or more coil windings of the at least one induction coil (IS) respectively enclose a surface area that is essentially aligned parallel to the direction of movement (BR) of the rolling elements (WK).

20. The system according to one of preceding claims 1 to 3, wherein the apparatus for generating a static magnetic field comprises two U-shaped magnetized elements (MK2, MK3), which respectively consist of a permanent magnet (PM2) and an L-shaped flux-conducting component (FLS3) and are arranged at a distance from each other and mirror-symmetrically with respect to the direction of movement (BR) of the rolling elements (WK), and wherein the rolling elements (WK) successively traverse the spatial region (RB) between the two magnetized elements (MK2, MK3), which is permeated by the magnetic field lines (FL) of the static magnetic field, during the operation of the linear motion device.

21. The system according to claim 20, wherein the extent of the magnetized elements (MK2, MK3) in the direction of movement (BR) approximately corresponds to the diameter of the rolling elements (WK).

22. The system according to claim 20 or 21, wherein a rolling element (WK), which follows or precedes a rolling element (WK) positioned between the permanent magnets (PM2) of the two magnetized elements (MK2, MK3), is arranged between the ends of the flux-conducting components (FLS3) of the two magnetized elements (MK2, MK3).

23. The system according to one of preceding claims 20 to 22, wherein the at least one induction coil (IS2) is arranged in such a way that the at least one coil winding of the at least one induction coil (IS2) extends annularly around the spatial region (RB), which the rolling elements (WK) successively traverse.

24. The system according to claim 23, wherein the at least one induction coil (IS2) is arranged in such a way that the at least one coil winding of the at least one induction coil (IS2) respectively extends through an intermediate space between the permanent magnet (PM2) and the flux-conducting component (FLS3) of the one magnetized element (MK2) and through an intermediate space between the permanent magnet (PM2) and the flux-conducting component (FLS3) of the other magnetized element (MK3).

25. The system according to one of preceding claims 1 to 3, wherein the apparatus for generating a static magnetic field comprises two identically designed magnetized elements (MK2, MK3) with an E-shaped profile, which are arranged at a distance from each other and mirror-symmetrically with respect to the direction of movement (BR) of the rolling elements (WK), wherein the E-shaped profile has three legs and a permanent magnet (PM2) is arranged on the central leg, and wherein, during operation of the linear motion device, the rolling elements (WK) successively traverse the spatial region (RB) between the two magnetized elements (MK2, MK3), which is permeated by magnetic field lines (FL) of the static magnetic field.

26. The system according to claim 25, wherein two induction coils (IS1, IS2) are arranged behind one another viewed in the direction of movement (BR) of the rolling elements (WK) and on opposite sides of the permanent magnet (PM2), and wherein the at least one coil winding of the two induction coils respectively extends annularly around the spatial region (RB), which the rolling elements (WK) successively traverse.

27. The system according to claim 26, wherein the two induction coils (IS1, IS2) are arranged in such a way that they respectively detect a different polarity of the static magnetic field influenced by the rolling elements (WK).

28. The system according to one of preceding claims 20 to 27, wherein the magnetic field lines (FL) partially extend parallel to the direction of movement (BR) of the rolling elements (WK).

29. The system according to one of preceding claims 20 to 28, wherein a magnetic field concentrator (MKO) of soft magnetic material with high relative magnetic permeability is arranged on the permanent magnet (PM2) of the one magnetized element (MK2) and / or on the permanent magnet (PM2) of the other magnetized element (MK3) in order to concentrate the magnetic field on the smallest space possible in the vicinity of a rolling element (WK).

30. The system according to one of preceding claims 1 to 29, furthermore comprising a rectifier (GR) for converting the voltage (Uind) induced in the at least one induction coil (IS) into a direct voltage.

31. The system according to one of preceding claims 1 to 30, furthermore comprising an energy storage (ES) for the storage and further use of the generated electrical energy, wherein said energy storage is selected from the group comprising: capacitor and accumulator.

32. The system according to one of preceding claims 1 to 31, which is designed for supplying electrical components on the first device component (15) or the second device component (20) of the linear motion device (10) with the generated electrical energy.

33. The system according to claim 32, wherein the electrical components comprise at least one sensor (S1, S2).

34. The system according to claim 32 or 33, wherein the electrical components comprise at least one wireless communication interface (KS) for transmitting data.

35. A linear motion device (10) with a first device component (15) and a second device component (20), wherein the second device component (20) is supported on the first device component (15) by means of rolling elements (WK) such that the second device component (20) is configured to be moveable linearly relative to the first device component (15), with at least one system according to one of preceding claims 1 to 34, wherein the apparatus for generating a static magnetic field and the at least one induction coil are arranged stationarily to the first device component or stationarily to the second device component.

36. The linear motion device according to claim 35, which is realized in the form of a profiled rail guide (10) with a guide rail as the first device component (15) and a guide carriage or guide block as the second device component (20).

37. The linear motion device according to claim 35, which is realized in the form of a ball screw with a spindle as the first device component and a spindle nut as the second device component, wherein the apparatus for generating a static magnetic field is arranged stationarily to the spindle nut.