DEVICE FOR CONTACTLESS INDUCTIVE ENERGY TRANSFER AND METHOD FOR OPERATING THE DEVICE

Description

[0001] The invention relates to a device for contactless energy transfer from a primary part to a secondary part, each of which has at least one coil that can be inductively coupled to one another across an air gap. The invention further relates to a method for operating such a device.

[0002] Compared to connectors, where energy is transferred via mechanically connected or separated contact elements, devices for contactless energy transfer offer advantages with regard to wear caused by a high number of mating cycles or strong vibrations. Furthermore, contact erosion during plugging or unplugging under electrical load is prevented. The risk of arcing when disconnecting connectors with high current loads is also eliminated with contactless energy transfer devices. Finally, contactless energy transfer provides galvanic isolation between the primary and secondary parts, which may be required, for example, in the medical field.The absence of mechanically interlocking contacts also makes it possible to provide the device with surfaces that are as smooth as possible, which makes it ideal for applications with increased cleanliness / hygiene requirements, for example in the food industry.

[0003] Its high wear resistance also makes contactless inductive energy transfer interesting in the automation sector, for example for transmitting energy to a robot's changing tool.

[0004] EP 3 131 180 A discloses a wireless power transmission method for a wireless power transmitter comprising a main half-bridge inverter connected to one end of a plurality of wound cells and a plurality of sub-half-bridge inverters connected to the other ends of the wound cells.

[0005] US 2014 / 0239733 A1 discloses an inductive charging system. The disclosure further relates to methods for controlling inductive charging. The inductive charging system serves for contactless inductive energy transfer from a primary part to a secondary part, each of which has at least one coil that can be inductively coupled to one another across an air gap. The primary part and / or the secondary part have at least one state detection device for detecting one or more state parameters of the primary part and / or the secondary part, and the at least one state detection device has a parameterization unit with which one or more of the state parameters are set and / or changed. The device is provided with at least one terminal for data input and data output, ieData display, and the at least one terminal has a screen surface designed to visually display one or more of the status parameters and to set or change information.

[0006] EP 2 083 407 A1 relates to a device for contactless energy and data transmission, comprising a primary unit having a primary inductance, and a secondary unit having a secondary inductance. The primary unit and the secondary unit are positioned relative to one another, at least temporarily, in such a way that a transformer coupling path is formed between the primary inductance and the secondary inductance. Furthermore, the primary unit is configured for contactless transmission of energy to the secondary unit, and the secondary unit is designed to supply terminal devices connected to it. The primary unit further comprises means for interrupting the energy transmission via the transformer coupling path during energy pauses, and the secondary unit comprises means for detecting the energy pauses.Furthermore, the secondary unit has means for transmitting data during power pauses, and / or the primary unit has means for transmitting data to the secondary unit. The invention also relates to a method for contactless power and data transmission.

[0007] WO 2013 / 087676 A2 describes a device for contactless inductive energy transfer from a primary part to a secondary part, which can replace a mechanical plug-in device for energy transfer, for example, to a robot's tool changer. The primary and secondary parts each have at least one coil that can be inductively coupled to each other and each interacts with a ferrite core. The ferrite core increases the magnetic flux through its permeability, allowing high electrical power to be transferred even with small device sizes and small transmission surfaces.

[0008] Due to the high magnetic flux, energy transfer is possible even when the primary and secondary parts are not (yet) in a position where the distance between them is minimal, but rather when there is a gap between them. Likewise, energy transfer can also occur with a certain lateral offset between the primary and secondary parts, i.e., when the coils of the primary and secondary parts are not on the same axis.

[0009] In addition, DE 10 2015 113 723 A1 is also mentioned as a prior art document, which also discloses a device according to the preamble of claim 1, wherein parameterization data for measuring devices and sensors connected to the energy transmission device can also be transmitted via a data connection.

[0010] Regarding the technological background, EP 2 564 403 A2 should also be mentioned, according to which parameters during operation of the otherwise generic device are monitored by the device itself and, if necessary, changed.

[0011] It is an object of the present invention to expand the possible applications of such a device for contactless energy transmission, in particular for use in the automation sector.

[0012] This object is achieved by a device having the features of independent claim 1.

[0013] Advantageous embodiments and further developments of the device and the operating method are specified in the dependent claims.

[0014] In this way, a one-time or preferably repeated, continuous recording of one or preferably several parameters of the device for contactless energy transfer is realized, which significantly simplifies the control and monitoring of this device. Preferably, the data is evaluated using an evaluation device, which makes it possible to generate warning signals as soon as the current behavior of the device deviates from a predetermined target behavior.

[0015] It is advantageous to not only record individual or multiple status parameters or related values ​​such as limit values ​​during operation, but also to set and / or change them using the terminal device, i.e., to perform parameterization. For this purpose, the status detection device is advantageously expanded with a setting function or a parameterization unit.

[0016] One or more status parameters are also displayed, particularly on a display of the terminal device.

[0017] The invention also relates to a control system with at least one terminal, a control device, at least one field device and at least one device according to one of the claims related thereto.

[0018] According to a preferred development, it can be provided that the state detection device of the primary part is coupled to a data transmission device of the primary part and / or that the state detection device of the secondary part is coupled to a data transmission device of the secondary part, so that the detected data can be forwarded internally to the device or externally to the device.

[0019] It is expedient if the state detection device of the primary part is coupled to one or more sensors for detecting one or more state parameters of the primary part, in particular the primary coil, and / or if the state detection device of the secondary part is coupled to one or more sensors for detecting one or more state parameters on the secondary part, in particular on the secondary coil.

[0020] According to another such variant, it can further be provided that the data transmission device of the primary part is further designed to transmit data via at least one data bus to the data transmission device of the secondary part.

[0021] This creates advantageous options.

[0022] To optimize the operation of the device or system, internal variables—such as current(s), voltage(s), temperature(s), and / or efficiency(s)—can be measured or determined. Through parameterization, a user can parameterize the device or process and thereby define and set respective limit values, particularly for these variables. The limit values ​​can be determined through a combinatorial evaluation of the sensor data.

[0023] If such a limit value set by parameterization is exceeded or a critical state is reached, the system issues a first warning (see also Fig. 6- Warning flags). If the system or device remains in a critical state, another warning can be issued after a specified time, for example. Instead of a third warning, the system can be set to shut down. This procedure represents significant protection for the device / system. In addition, the device or system is monitored (for example, the air gap), and at the same time, monitoring the internal variables ensures that the system is operating optimally. This also implicitly increases the availability of the system in which the system is installed.

[0024] Optionally, according to a variant of the invention, advantageously independent or controlled, with and without parameterized announcement, functional actions such as switching off the transmission and / or reducing the power or the like can be carried out.

[0025] It can further advantageously be provided that the data transmission device of the secondary part is designed to transmit data via at least one data bus or multiple data buses to at least one field device. This option for data exchange with the field devices, in turn, expands the possible applications of the device for contactless energy transmission.

[0026] According to a further variant, the primary part and the secondary part each have a data transmission unit for transmitting data across the air gap. Particularly when used in automation in an industrial environment, a data connection is often required in addition to the supply current, e.g. for a tool replacement on a robot arm. The joint transmission of power and data through a single device with only one primary and one secondary part simplifies the setup and maintenance of the arrangement. In an advantageous embodiment of the device, the data is transmitted optically across the air gap. This selects a data transmission channel that is not subject to any interference with the inductive energy transmission. The data transmission units are preferably arranged centrally and concentrically to the coils.The space located in the center of the coils can be utilized in this way, allowing the data transmission units to be integrated into the primary or secondary part without increasing their dimensions compared to systems that serve only for energy transmission. In a further advantageous embodiment of the device, the data transmission units each have at least one transmitting element and at least one receiving element. Preferably, the transmitting element is arranged centrally and surrounded by several receiving elements.

[0027] The invention is explained in more detail below using exemplary embodiments and figures. The figures show: Fig. 1 is a sectional view of a first schematically illustrated device for contactless energy transmission; Fig. 2 is a further sectional view of the device shown in Figure 1illustrated device; Fig. 3 a schematic view of a control system with a variant of a device for contactless energy transfer; Fig. 4 a schematic representation of the device for contactless energy transfer from Fig. 3 ; Fig. 5 a schematic view of a second variant of a device for contactless energy transmission for the control system of the Fig.3 ; Fig. 6 a schematic representation of a first screen surface for displaying status information of the device from Fig. 4 or 5 ; and Fig. 7 a schematic representation of a variant of a screen interface for displaying status information of the device from Fig. 4 or 5 .

[0028] Figure 1 shows a schematic sectional view of a first device for contactless energy transfer from a primary part 1 to a secondary part 1'. In Figure 2the primary part 1 is shown in a section along the Figure 1 shown section line AA.

[0029] Elements assigned to the primary part 1, hereinafter also referred to as primary-side elements, bear reference symbols without an apostrophe in the figures. Elements assigned to the secondary part 1', hereinafter also referred to as secondary-side elements, bear reference symbols with a corresponding apostrophe.

[0030] Primary and secondary elements that have the same or a comparable function are provided with reference symbols with the same numbers. Unless explicitly referred to the primary or secondary side, reference symbols without apostrophes are used below to refer to both sides.

[0031] The primary part 1 and the secondary part 1' each have a housing 2, which can be made of a material commonly used for connector housings, such as plastic, aluminum, stainless steel, or the like. The housings 2 are half-shell-shaped, with their front side closed by a front panel 3. In the rear area, facing away from the front panel 3, a cable bushing 4 or a plug connection for a connecting cable 5 is incorporated into the housing 2. The connecting cable 5 is preferably a hybrid cable that has connecting lines for supplying power, including the power to be transmitted, as well as data lines. Alternatively, power and data can also be supplied in separate lines. Instead of fixed lines, plug connectors can also be arranged on the housing 2.

[0032] Directly behind the front panel 3, a coil 10 is arranged, which is wound on a ferrite core 11 or on a coil former inserted into the ferrite core 11. The coil 10 can be wound with a single conductor. However, to reduce the skin effect, the use of multi-core high-frequency stranded wire is preferred.

[0033] In the illustrated embodiment, the ferrite core 11 is a round pot core on the primary and secondary sides with an outer edge 12 and an inner dome 13 concentric therewith. Such a core is also referred to as a (cylindrically symmetrical) E-core. The cross-sections of the outer edge 12 and the inner dome 13 are preferably approximately the same size in order to achieve a homogeneous magnetic flux density while taking into account the different stray fields in the ferrite core 11. The use of ferrite cores with different geometries is also possible. For example, square or rectangular cores with round or square or rectangular ferrite cores can be used. Coils without coil bodies, e.g. with conductors glued together, can also be used. The ferrite cores 11 are open towards the respective front plate 3, whereas on the opposite side the outer edge 12 and the inner dome 13 are connected to one another via a pot base.The coil 10 is inserted into the annular groove between the outer edge 12 and the inner dome 13. Any remaining gap between the outer and inner edges of the coil 10 and the ferrite core 11 can be filled with a heat-conducting medium (with the possibility of heat dissipation to the housing).

[0034] During operation, the primary part 1 and the secondary part 1' are brought into contactless inductive energy transfer with their front plates 3, 3' facing each other and at a short distance from each other. Figure 1 This distance, which forms an air gap 6, is shown as transmission distance z0.

[0035] The permissible transmission distance z0 ranges from 0 to several millimeters or centimeters, depending on the size, particularly the diameter, of the coils 10 or ferrite cores 11. The direction along the axis of the primary-side coil 10 is referred to below as the z-direction, and the associated axis as the z-axis. The x- and y-directions or axes run perpendicular to this in the plane of the front panel 3.

[0036] During operation, the primary-side coil 10, hereinafter also referred to as the primary coil 10, is supplied with an alternating current. Preferably, the primary coil 10 and a resonant capacitor form a resonant circuit whose frequency is in the range of a few kilohertz (kHz) to a few hundred kHz, with a frequency in the range of a few tens of kHz being particularly preferred. The alternating current supplied to the primary coil 10 is provided by an inverter. A pulse width modulation (PWM) method, for example, can be used in the inverter to generate the alternating voltage. The inverter, together with monitoring and control devices, is located on a circuit board 20 within the housing 2 of the primary part 1. In the figure, electronic components 21 are shown on the circuit board 20 as an example.

[0037] To protect the inverter from a resonance increase of the amplitude at the resonant circuit, formed by the aforementioned resonance capacitor and the primary coil 10, the resonant circuit is operated slightly over-resonantly, i.e. at frequencies above the resonance frequency.

[0038] During energy transmission, the magnetic coupling between the primary coil 10 and the secondary coil 10', hereinafter referred to as the secondary coil 10', is particularly efficient due to the ferrite cores 11 and 11'. A voltage is induced in the secondary coil 10', which, after rectification, voltage conversion - and, if necessary, voltage stabilization - is available as an output voltage on the connecting cable 5' for delivering the transmitted energy. The electronic components on the secondary side are also arranged on a circuit board 20', with individual electronic components 21' being shown here as examples. The secondary coil can advantageously have a center tap, so that a synchronous rectifier can be used.

[0039] In the illustrated embodiment, no interlocking guide or positioning elements are provided that would laterally align the primary part 1 and the secondary part 1' when joined together. Due to the absence of such elements, the primary part 1 and the secondary part 1' can also be brought into the operating position or separated from one another by a lateral movement, i.e. a movement in the x and / or y directions. This proves to be particularly advantageous in the automation sector, since an additional axial movement of the primary and secondary parts 1, 1' towards each other is not required to establish or separate a connection. Depending on the intended application, such guide or positioning elements can also be provided in alternative designs.

[0040] The ferrite cores 11, 11' allow for a high magnetic flux density, enabling efficient energy transmission even with a small coil volume. The transmission is relatively tolerant of lateral displacement of the primary part 1 and the secondary part 1' relative to each other. This is a significant advantage, for example, in the automation sector, as high positioning accuracy required for establishing a conventional contact-based connector is no longer necessary.

[0041] For data transmission, the device is provided with a data transmission device 50. This device can have one or more data transmission units 30, 30' in order to transmit data via one or more data interfaces with one and / or more data buses within the device and / or to external components outside the device, or to receive data from these components.

[0042] Fig. 3shows a schematic view of a control system 100 with a variant of a device 110 for contactless energy transmission (here referred to as a transmission system). This device 110 in turn has a primary part 1 (primary side 1) and a secondary part 1' (secondary side), which are surrounded here by a rectangle with rounded corners purely to illustrate their functional relationship.

[0043] The control system 100 has a number of buses. In this sense, a bus is a subsystem of the control system that transmits data or energy unidirectionally or bidirectionally between devices of the control system with a processor, in particular a CPU, or between other components of individual devices of the control system 100. The device 110 for contactless energy transfer is, in this sense, one of the devices of the control system. The buses of the control system 100 can be designed in parallel or bit-serial. Their architecture can be linear and / or star-shaped. There are also external buses of the control system 100. In the context of this application, these are all buses outside the device 110 for contactless energy transfer, which connect it to devices of the control system 100 external to the device 110. There are also internal buses of the control system 100.For the purposes of this application, these are buses used to transmit energy and / or data or signals within device 110. Device 110 has at least one microcontroller (not visible here) or another processor, in particular a CPU.

[0044] Devices of the control system 100 here also include at least one control device 120, in particular a gateway, at least one terminal (communication terminals 130), at least one cloud 140 (in the sense of a computer device, in particular a storage device with its own CPU capability, which is accessible via the Internet) and at least one field device 150. As an option, a control cabinet 160 with a display unit 170 is shown.

[0045] An arrow PI serves to illustrate the contactless internal energy transfer between the primary part 1 and the secondary part 1' by means of an internal energy bus. An arrow DI also serves to illustrate a wireless or contactless internal data transfer between the primary part 1 and the secondary part 1' by means of an internal data bus. To implement this data connection, the primary part 1 and the secondary part 1' each have a data transfer unit 30, 30', which forms part of the data transfer device of the device 100 ( Fig. 1 , 3 , 4 ).

[0046] The primary part 1 is further connected to the control unit 120—for example, a gateway—via at least one external power bus P-E10 and at least one first external data bus DE-10, and preferably (but not necessarily) via a second external data bus DE-11 for wired or wireless data transmission. The control unit 120 or the gateway can in turn be connected to the at least one terminal 130 for data output, in particular display, and data input, at least via the first external data bus (thicker, unfilled arrows) or another configured data bus, which can, for example, use a different transmission protocol, in order to display status data of the control system, in particular of the device for contactless energy transmission, and / or to input control commands.

[0047] The control unit 120 can also be connected to several of the terminal devices 130. Here, two terminal devices 130 are provided. One of the terminal devices 130 is connected directly to the control unit 120 via the first external data bus, and the other terminal device 130 is connected indirectly—here via a cloud 140—and the first external data bus to the control unit 120. For data transmission on the at least one external data bus DE-10, a wide variety of physically and data-technically designed systems can be used, such as fieldbus systems of various types such as Profibus or Ethernet. The terminal device 130 is coupled here to a second terminal device, which is designed as a display unit 170 on a control cabinet 160 (see Fig. 3 ). In this way, a display can be made directly on or in a control cabinet.

[0048] The secondary part 1' is further connected via a second external energy bus PE-20 to one or more field devices 150, for example to one or more drives, initiators or sensors or the like, in order to supply them with energy.

[0049] The secondary part 1' is also connected to at least one or more of the field devices 150 via a third external data bus DE-30 in order to transmit control data or signals to them or to receive control data or signals from them. The second external data bus DE-30, in particular its transmission protocol, can be designed in the manner of the first external data bus.

[0050] In this way, remote control of the device 110 for contactless energy transmission and preferably also of the field device(s) 150 connected to the secondary part 1' of the device 110 for contactless energy transmission is possible.

[0051] Remote monitoring and diagnostics of the device 110 for contactless energy transfer are also possible. Preferably, remote monitoring and diagnostics of the field devices 150 connected to the secondary part 1' of the device for contactless energy transfer are also possible.

[0052] Fig. 4 shows a schematic representation of a device 110 for contactless energy transmission according to the type of Fig. 1 .

[0053] Shown again are the energy transmission paths or buses PE-1, PI and PE-2 and the data transmission paths or data buses DE-10, the optional second data bus DE-20 and the optional third external data bus DE-30.

[0054] For energy transmission, the primary part 1 comprises the components described above, in particular the primary coil 10. For data transmission, at least the primary part 1 also comprises a data transmission device 40. This data transmission device 40 is coupled here to the first external data bus DE-10. The first data bus can be designed for parallel data transmission. It is further coupled to a second external data bus DE-20. This second external data bus DE-20 can be a data bus for serial data transmission, e.g., RS 232 or RS 485.

[0055] The second external data bus DE-20 is an advantageous option, but it is not mandatory. The second external data bus DE-20 is preferably coupled to the control unit 120.

[0056] The primary part 4 has a condition monitoring device 50. One or more sensors (sensors S1, S2, ..., SN) are connected to the condition monitoring device 50.

[0057] The state detection device 50 thus serves to detect one or more state parameters of the device for contactless energy transmission, in particular of the primary part 1, in particular during operation of the device 110 for contactless energy transmission during the energy transmission.

[0058] The state detection device 50 is coupled to the data transmission device 40 of the primary part 1. This device can forward the state parameters determined by the state detection device 50 of the primary part 1 via one data bus or one of the data buses—here, the second external data bus DE-20—to the control unit 120, which can transmit the information from there via a data bus, such as the Internet or the like, to the or one of the terminal devices 130. It is advantageous to use a separate data bus, here, for example, a serial data bus, to transmit the determined state parameters. However, this is not absolutely necessary.

[0059] Optionally, according to an advantageous - but again not mandatory - development, it is provided that the secondary part 1' also has a data transmission device 40'. This is preferably a data transmission device 40' with a first data transmission unit 30' for internal data transmission via the internal bus DI between the primary part 1 and the secondary part 1'. In addition, the data transmission device 40' can be designed to forward and receive data via the third external bus DE-30 to the field devices 150. In this way, data can be transmitted to these field devices and data can be transmitted from the field devices 150 to the primary part 1 and from there to the control device 120 and further back via the first external data bus to the terminal devices 130.

[0060] Optionally—but not necessarily—the secondary part 1' also has a condition detection device 50'. One or more sensors (S1', S2', ..., SN') are connected to the condition detection device 50' in order to detect such condition parameters.

[0061] The state detection device 50' serves to detect one or more state parameters of the device for contactless energy transmission, in particular of the secondary part 1'.

[0062] The condition detection device 50' is coupled to the data transmission device 40' of the secondary part 1'. This device can forward the condition parameters determined by the condition detection device 50' of the secondary part 1' via the internal data bus DI to the primary part 1 and from there to the control unit 120, which can then transmit the information from there, for example, directly or indirectly via the Internet or the like, to the terminal 130. This advantageously expands the condition monitoring by an option for directly monitoring the condition of the secondary part 1'.

[0063] Status parameters that can be recorded and monitored in this way in the primary part 1 and / or in the secondary part 1' are in particular (the following lists are not to be understood as exhaustive): voltage and current, in particular input voltage; (effective) input current and / or output voltage and (effective) output current at the primary part 1 and / or at the secondary part 1'.

[0064] Other status parameters that can be recorded and monitored in this way are: Effective input current; status; internal temperature; housing temperature / surface; ambient temperature at the primary part 1 and / or the secondary part 1'.

[0065] Further status parameters that can be recorded and / or monitored in this way are parameters of the stray field sensor system (voltage in inductors), distance between primary part 1 and secondary part 1'; angle between primary part 1 and secondary part 1'; quality of the input voltage; input power; output power; efficiency; object detection FOD (changes in the magnetic field), identification of the remote module; operating point; master data of the secondary side or secondary part 1'; master data of the primary side or primary part 1.

[0066] These parameters can be recorded and / or displayed, in particular on a display of the terminal 130. If a PC or a mobile device such as a mobile phone or the like is used as the at least one terminal 130, the screen surface can be configured, for example, according to the type of Fig. 6 or 7 and have one or more display fields designed to display the individual parameters.

[0067] It is also advantageously possible to not only record individual or multiple parameters during operation, but also to adjust and / or change them, i.e., to parameterize them. This functionally expands the state detection device 50, 50' by adding a setting function or a parameterization unit.

[0068] Preferably, parameters are set or changed—e.g., current default values ​​or limit values—by entering the parameters on a screen interface of the terminal device 130. These inputs are transmitted from the terminal device 130, for example, via the Internet, the control device 120, and the external data bus DE-10 of the device 100 for contactless energy transfer as setting values ​​or setting parameters. In a further embodiment, a mobile device with a radio interface, such as Bluetooth or NFC (Near Field Communication), can also be used directly for parameterization and identification. It is advantageous for this purpose if the device 110 for contactless energy transfer is provided with a preferably Internet-capable identification address for identifying and addressing the device in the control system, in particular via the Internet.

[0069] After Fig. 5The state detection device 50 and / or 50' of the primary part 1 and / or the secondary part 1' each has a plurality of sections 50a, 50b, or 50a' and 50b', which can be connected via an internal data bus CM, CM'. This can be designed in the i 2< C standard.

[0070] One of the sections 50a, 50a' is directly coupled to the respective data transmission device 40, 40', and the other section 50b, 50b' is directly assigned to the respective primary coil 10 or secondary coil 10', respectively, in order to be able to record status parameters directly at these components and to forward them via the respective data bus to the control unit 120 and from there to the terminal device(s) 130. The data and energy transmission units 40 and 10, as well as possibly 40' and 10', can be integrated into a housing and combined locally, which simplifies handling. However, it is also conceivable to design them separately from one another and possibly even to arrange them at different locations. The data and energy transmission units can then each have their own status detection devices 50a, 50b; 50a', 50b' (similar to Fig. 5 ).

[0071] Possibilities for visualizing the recorded parameters illustrate the Fig. 6 and 7. It is shown that parameters are displayed on the screen of a terminal device, e.g., a PC, such as voltage, coil current, or temperature (here, e.g., of the primary coil 10 of the primary part 1). Data transmission parameters (transmission rate, etc.) can also be displayed, as well as other parameters, as in Fig. 6 or 7 This is evident from the terms used. It is also conceivable to link several parameters and output or display the linked values. It is also conceivable to set thresholds or similar, for example, to indicate whether a value has been reached or exceeded, particularly on a terminal device display.

[0072] In this respect, it is advantageously possible to output an error code (error flag) in the event of a deviation from a predefined value or value range or from a predefined value behavior (e.g., a deviation from a gradient of a measured value). A message with various parameters is also possible (e.g., warning flag at 90% utilization / temperature close to the protective shutdown / strong input fluctuations / constantly at the upper distance limit). The internal data bus DI of the device 110 is a very advantageous option and offers the possibility of implementing further control and monitoring options. However, the internal data bus DI is not a mandatory option for all variants according to the invention. Fig. 1For contactless energy transmission, the primary part 1 and the secondary part 1' of the device optionally have data transmission units 30 and 30', respectively, integrated into the data transmission devices 40 and 40', which transmit (digital) data bidirectionally between the primary part 1 and the secondary part 1'. Thus, via the device for contactless energy transmission, an automation component or a field device, for example, can be supplied not only with power but also with data. The device for contactless energy transmission thus provides important interfaces, for example for a tool change, in a combined, contactless manner. The data transmission units 30 and 30' are preferably identical, so that the data can be transmitted bidirectionally without a preferred direction.

[0073] The transmission is preferably carried out optically with at least one transmitting element and at least one receiving element in each of the data transmission units 30 and 30', respectively. In the illustrated embodiment, the data transmission units 30 and 30' are each arranged centrally (in the x and y directions) and with a light entry and exit surface, if possible, in the plane of the cover plate 3, 3'.

[0074] Bidirectional transmission can be achieved using a full-duplex method, for example, by using light of different wavelengths for the two transmission directions. A full-duplex method can also be implemented using the same wavelength for both transmission directions, for example, by using differently modulated signals in the two transmission directions.

[0075] Alternatively, bidirectional transmission is also possible in a half-duplex method, for example by using a time-division multiplexing method with alternating time slots for the two transmission directions. List of reference symbols

[0076] 1 Primary part 1' Secondary part 2, 2' Housing 3, 3' Cover plate 4, 4' Cable entry or plug connection 5, 5' Connecting cable 6 Air gap 10 Primary coil 10' Secondary coil 11, 11' Ferrite core 12, 12' Outer edge 13, 13' Inner dome 20, 20' Circuit board 21, 21' Electronic components 30, 30' Data transmission unit 40 Data transmission device 50, 50' State detection device x, y, z Cartesian coordinates z0 Distance 100 Control system 110 Device for contactless energy transfer 120 Control unit 130 Terminal device 140 Cloud 150 Field device 160 Switch cabinet 170 Display unit D-I Internal Data Bus P-I Internal Power Bus PE-10 First External Power Bus PE-20 Second External Power Bus DE-10 First External Data Bus DE-10 Second External Data Bus S1, S2, ..., SNSensors S1', S2', ..., SN'Sensors

Claims

1. Device for contactless inductive energy transmission from a primary part (1) to a secondary part (1') that comprise in each case at least one coil (10, 10') that can be inductively coupled to each other over an air gap (6), characterized in that the primary part (1) and / or the secondary part (1') comprises at least one condition monitoring device (50, 50') for monitoring one or more internal variables, including current / currents, voltage / voltages, temperature / temperatures and / or efficiency / efficiencies, as condition parameters of the primary part (1) and / or the secondary part (1'), and in that the at least one condition monitoring device (50, 50') has a parameterization unit with which one or more limit values for individual or multiple condition parameters can be set and / or changed, wherein the data transmission device (40) of the primary part (1) is designed for transmitting data via at least one data bus or multiple data buses to a control device (gateway 120) or directly to a terminal unit (130), wherein the device is further coupled directly or via the control device (120) to the at least one terminal unit (130) for data input and data output, i.e., data display, and wherein the at least one terminal unit (130) has a screen interface which is designed for the visual display of one or more of the condition parameters and for setting or changing the one or more limit values for individual or multiple of the condition parameters current / currents, voltage / voltages, temperature / temperatures and / or efficiency / efficiencies.

2. Device according to claim 1, characterized in that the condition monitoring device (50) of the primary part (1) is coupled to a data transmission device (40) of the primary part (1) and / or in that the condition monitoring device (50') of the secondary part (1') is coupled to a data transmission device (40') of the secondary part (1').

3. Device according to claim 1 or 2, characterized in that the condition monitoring device (50) of the primary part (1) is coupled to one or more sensors (S1, S2, ..., SN) for monitoring one or more condition parameters on the primary part, in particular on the primary coil (10), and / or in that the condition monitoring device (50') of the secondary part (1') is coupled to one or more sensors (S1', S2', ..., SN') for monitoring one or more condition parameters on the secondary part (1'), in particular on the secondary coil (10').

4. Device according to one of the preceding claims, characterized in that the data transmission device (40) of the primary part (1) is further designed to transmit data via at least one data bus to the data transmission device of the secondary part (1').

5. Device according to one of the preceding claims, characterized in that the data transmission device (40) of the secondary part (1') is designed to transmit data via at least one data bus or multiple data buses to at least one field unit (150).

6. Device according to one of the preceding claims, characterized in that it comprises an identification address for identifying and addressing the device in a control system.

7. Device according to one of the preceding claims, characterized in that the respective data transmission device (40, 40') of the primary part (1) and / or the secondary part (1') is designed to transmit the condition parameters obtained via a separate data bus exclusively for the transmission of these values.

8. Device according to one of the preceding claims, characterized in that the data transmission devices (40, 40') are designed for transmitting data via the air gap (6) and in that, for this purpose, the primary part (1) and the secondary part (1') each have, as the or one of the data interface(s), a data transmission unit (30, 30') for transmitting data via the air gap (6).

9. Control system having at least one terminal unit (130), a control unit (120), at least one field unit (150) and at least one device according to one of the preceding claims.