DE102020212663A1 - Power transmission device, watercraft, power transmission system and operating method for a power transmission system - Google Patents

Abstract

The invention relates to a device for energy transmission (30), at least comprising an energy supply device (40), a primary coil (50) which is electrically connected to the energy supply device (40), a stationary fixing element (70) comprising ferromagnetic material, characterized in that the The primary coil (50) can be brought into an effective electromagnetic connection with the stationary fixing element (70). The invention also relates to a watercraft (90) at least comprising an onboard power supply (120), an onboard fixing element (100), a secondary coil (130) which is electrically connected to the onboard power supply (120) and mechanically connected to the onboard fixing element (100). can be brought, characterized in that the secondary coil (130) can be brought into an operative electromagnetic connection with an outboard fixing element. Furthermore, the invention relates to an energy transmission system (10), at least comprising a device for energy transmission (30) and a watercraft (90), characterized in that the outboard fixing element of the watercraft (90) the stationary fixing element (70) of the device for energy transmission (30 ) is. The invention also relates to a method for controlling the energy transmission system (10).

Description

The invention relates to a device for energy transmission according to claim 1. The invention also relates to a watercraft according to claim 5 and an energy transmission system according to claim 8 and an operating method according to claim 10.

Societal pressure and ever-increasing emission requirements are driving the electrification of vehicles. The drive concept of the vehicle consists of at least one electric motor and a secondary energy store. In the context of public discussions, the focus is primarily on motor vehicles, but electrification is not limited to this type of vehicle. Water vehicles are also increasingly being targeted by electrification.

Such a watercraft can be supplied with energy using conductive charging methods. The main disadvantage of conductive charging methods for watercraft is the environmental conditions. Condensate accumulations in the plug connections lead to oxidation of electrical contact surfaces. The saline environmental media have a negative effect on the electrical contact surfaces, especially at sea.

Alternatively, inductive charging methods are known which are of little importance in practice. So shows the document CN207403894U a watercraft charging station mounted on a circular island. The island is connected to a landing body, for example a quay, via a connecting bridge. Watercraft are fixed via bollards located on the island. For the charging process, a mobile charging device, which contains a primary coil, is positioned over a secondary coil on the ship's deck by means of a positioning pin. The energy is transferred between the mobile charging device and the watercraft by means of the primary and secondary coils. The primary coil is supplied with energy via an energy distributor, which is located on the circular island.

From the document CN110341505A another concept for the inductive charging of watercraft emerges. A module with a primary coil is located on a landing body, for example a quay. Furthermore, a module with a secondary coil is attached to a ship's side of the watercraft. Using both modules, energy is transferred inductively from the landing body to the watercraft. The watercraft must be positioned exactly for the energy transfer.

Due to the lack of bundling and guidance of the magnetic field lines in the embodiment variants of inductive charging methods disclosed in the prior art, stray losses arise, which reduce the efficiency of the energy transmission. The object of the present invention is therefore to increase the efficiency of an inductive charging device for watercraft.

This object is achieved according to the invention by a device for energy transmission having the features of claim 1, by a watercraft having the features of claim 5 and an energy transmission system having the features of claim 8. Further advantageous embodiments are specified in the dependent claims.

• - eine Energieversorgungseinrichtung;
• - eine mit der Energieversorgungseinrichtung in elektrischer Verbindung stehende Primärspule;
• - ein ortsfestes Fixierungselement umfassend ferromagnetisches Material.

According to the present invention, an energy transfer device is provided. This includes at least:

• - a power supply device;
• - A standing with the energy supply device in electrical connection primary coil;
• - a stationary fixing element comprising ferromagnetic material.

The invention is characterized in that the stationary fixing element can be brought into an effective electromagnetic connection with the primary coil.

The magnetic field lines, which result from a current flow through the primary coil, are bundled by the stationary fixing element made of ferromagnetic material. Magnetic stray losses are reduced by bundling magnetic field lines. This advantageously increases the efficiency of the energy transmission system for watercraft.

An energy supply device is to be understood as meaning any device that can be used to supply energy for electrical components. The energy supply device can be supplied with electrical energy via a connection point via a direct or indirect connection. In this case, electrical energy can be provided by means of an energy line between the energy supply device and a conversion point for any form of energy into electrical energy, preferably in the form of an energy distribution network.

Furthermore, the energy can be supplied by means of an energy line between the energy supply device and a mobile charging station for motor vehicles. Due to the energy supply by means of an energy distribution network, belie big lot of energy available. Furthermore, the energy supply device can be operated in the network of an intelligent electricity network (“smart grid”).

Alternatively, a device for directly converting energy, for example a generator, can be located at a connection point of the energy supply device via a direct or indirect connection. In a further embodiment variant, the energy supply can be guaranteed by a wind power plant, or by an offshore or onshore wind farm. As a result, an energy supply can be achieved independently of an energy distribution network.

An electrical component that is directly or indirectly connected to the energy supply device can be located at a further connection point.

A primary coil is an electrical component that includes at least metallic material, which is electrically conductive. In one embodiment variant, a primary coil has at least one turn. Furthermore, the conductor cross section of the coil material can assume any shape, preferably an approximately circular shape.

By winding the coil material, any winding shape of the primary coil can be generated, for example an approximately circular winding shape. In a preferred embodiment, the winding form of the coil has the cross section of the ferromagnetic component to which the primary coil can be attached. The cross section of the component can be described by a polygon and/or an approximately circular cross section. By realizing an approximately identical cross section between the winding form of the primary coil and the ferromagnetic component, an air gap that occurs between the two can be kept small. This reduces reluctance and further increases the efficiency of the energy transfer.

An electrical connection is to be understood as meaning a detachable, conditionally detachable or non-detachable contact between two electrically conductive components. In this case, the electrical connection should preferably be implemented in such a way that the contact resistance between the two electrical components is as low as possible in order to be able to transmit electrical energy with the lowest possible power loss.

A stationary fixing element is used to limit the degrees of freedom of a watercraft and thus ensures a fixed target position of the watercraft in the water. In addition to restricting the degrees of freedom, the fixing element serves to concentrate magnetic field lines, which can be used to generate functional integration. The number of components can be reduced by the functional integration and an effective electromagnetic connection can be generated between the primary coil and the stationary fixing element.

A current flow through the primary coil is required for the creation of an effective electromagnetic connection between a fixing element and a primary coil. In one embodiment, the fixing element can be surrounded by at least one turn of the primary coil. The ferromagnetic material of the fixing element also allows the magnetic field lines to be focused, which minimizes stray losses and thus losses in efficiency. An effective electromagnetic connection is to be understood as meaning a magnetic interaction between at least two bodies caused by current flow. Both bodies are penetrated by at least one common magnetic field line.

A Cartesian coordinate system is introduced at this point for the following sections of the description. The x-y plane of the Cartesian coordinate system lies in the bottom surface of a landing body. A landing body represents a shore structure that can be used as a dock for watercraft. The z-direction of the Cartesian coordinate system points in the direction of the horizon.

In one embodiment, the device for energy transmission contains a stationary fixing element, which can be designed as an I-shaped profile, for example in the form of a semi-finished product. An I-shaped embodiment includes all geometric bodies whose cross sections can be described by a polygon and/or an approximately circular cross section. The cross section can be described by the x-y plane of the Cartesian coordinate system. Such a cross-section can be produced using already standardized manufacturing processes, which means that low purchasing costs can be achieved.

Furthermore, the dimensions of an I-shaped body are significantly larger in one of the spatial directions of the Cartesian coordinate system than in the remaining spatial directions, for example in the z-direction.

In a preferred embodiment, the device for energy transmission comprises, in addition to the stationary fixing element, a rotatably mounted L-shaped profile and a web. In this case, both the web and the L-shaped profile can comprise ferromagnetic material.

The geometric shape of an L-shaped profile can be formed by a combination of two previously described I-shaped profiles. The I-shaped profiles are arranged in such a way that the vectors that characterize the largest dimension of the I-shaped profile are coplanar with one another. Furthermore, the I-shaped profiles should preferably be arranged in such a way that there is surface contact between the two profiles.

In this embodiment, the primary coil can enclose the rotatably mounted L-shaped profile. A current flow within the primary coil results in an electromagnetic active connection between the stationary fixing element, the rotatably mounted L-shaped profile and the web. The L-shaped profile can assume a rotational position in which at least the L-shaped profile, the fixing element and the web form a closed magnetic circuit. By designing the closed magnetic circuit, the magnetic flux can be guided between the primary and secondary coils in a targeted manner, which reduces stray losses and further increases the efficiency of the energy transmission.

A rotatable bearing means, at least for a specific range of rotation, an unrestricted rotational degree of freedom in the Cartesian coordinate system, whereas remaining rotational degrees of freedom are restricted. The unrestricted rotational degree of freedom should preferably be chosen such that the vector of the rotational axis is collinear with the z-axis of the Cartesian coordinate system.

The web serves to connect the bearing point of the L-shaped profile to the stationary fixing element. In a preferred embodiment, the web can be designed as an I-shaped profile. In this preferred embodiment, a planar contact is desirable at the connecting points of the web.

The rotational position for forming a magnetic circuit with minimal reluctance results from the alignment of the L-shaped profile, so that the air gap between the stationary fixing element and the L-shaped profile assumes a minimum value.

A magnetic circuit is a closed path, or loop, of magnetic flux. For a closed circuit, at least one magnetic field line must pass through the elements of the magnetic circuit. A magnetic circuit can include ferromagnetic elements, which preferably have a flat connection point to one another.

A further embodiment is characterized in that the ferromagnetic material comprises a laminated metal core and/or a powder-metallurgical metal core and/or a ferrite core.

Laminated metal cores comprise at least two layered layers of a metal sheet, these preferably being in planar contact with one another. The execution of the ferromagnetic material as a solid material is not expedient for metal cores. The applied magnetic field, which changes over time, results in eddy currents, which would heat up the solid material or the metal core. To avoid this undesired heating, the metal core can be designed in a laminated form. The design reduces the generation of eddy currents and thus the unwanted heating.

Dust cores are manufactured by powder metallurgy from ferromagnetic material and an organic and/or inorganic electrically insulating binder. In contrast to a metal core made of solid material, but also compared to laminated metal cores, white powder cores have lower eddy current losses at high frequencies, since the metal grains have a particularly high level of electrical insulation from one another thanks to the binder.

Ferrite cores include ferrimagnetic materials. The ferrite grains result in low electrical conductivity. As a result, ferrite cores are characterized by low metal-core losses over a wide frequency range.

• - ein Bordnetz;
• - ein bordseitiges Fixierungselement;
• - eine Sekundärspule die in elektrische Verbindung mit dem Bordnetz und in mechanische

According to the invention there is further provided a watercraft. This includes at least:

• - an on-board network;
• - an onboard fixing element;
• - A secondary coil in electrical connection with the vehicle electrical system and in mechanical

Can be connected to the onboard fixing element. The invention is characterized in that the secondary coil in a electromagnetic operative connection can be brought with an outboard fixing element.

Due to the electromagnetic operative connection of the secondary coil with an off-board fixing element, magnetic field lines, which result when a current flows through a primary coil, can be bundled. By bundling magnetic field lines, magnetic stray losses are reduced and, as a result, the flux through the secondary coil is increased. This advantageously further increases the efficiency of the energy transmission system for watercraft.

A vehicle electrical system can contain electrical lines and/or electrical connections and/or electrical loads. The vehicle electrical system can ensure the energy supply to individual electrical consumers and/or the flow of information between individual electrical consumers. An electrical consumer is an electrical component that can use electrical energy as an input variable. In this case, energy can be converted within the electrical load, for example from electrical energy into mechanical energy.

An onboard fixation element is attached to the watercraft, preferably on board the watercraft. This can be used to limit the degrees of freedom of a watercraft. The onboard fixing element uses an intermediate element, for example a cable, to create a power line between the watercraft and the offboard fixing element. The power line serves to limit the degrees of freedom of the watercraft.

A secondary coil is an electrical component comprising at least metallic material, which is electrically conductive. In a preferred embodiment variant, a secondary coil has at least one turn. Furthermore, the conductor cross section of the coil material can assume any shape, preferably an approximately circular shape.

Any winding shapes of the secondary coil can be generated by the winding of the coil material, for example an approximately circular winding shape. In a preferred embodiment, the winding form of the coil has the cross-section of the outboard fixing member to which it is attachable. The cross section of the outboard fixing element can be described by a polygon and/or an approximately circular cross section. By realizing an approximately identical cross section between the winding form of the coil and the outboard fixing element, an air gap that occurs between the two can be kept small. This reduces reluctance and further increases the efficiency of the energy transfer.

A mechanical connection can be understood to mean all types of connection with which force can be mechanically transmitted between two elements. The mechanical connection can be designed as detachable and/or non-detachable.

An overboard fixation element is a fixation element which is located outside of the watercraft. Any fixing element that serves to restrict the degrees of freedom of a watercraft can be used. In one embodiment, a fixation element located on a landing body is used.

• - einen Strang zur Energieübertragung;
• - einen Strang zur Kraftübertragung;

umfasst.A preferred embodiment of the watercraft is characterized in that the secondary coil has at least:

• - a strand for power transmission;
• - a power transmission line;

includes.

A strand for energy transmission is interspersed with a time-varying magnetic field, which can be generated by a primary coil, for example. An induction voltage is generated within the secondary coil. The power transmission line is used to supply electrical consumers of the watercraft with electrical energy.

A line for power transmission can be understood as any element that can safely transmit the forces between the watercraft and the landing body. The degrees of freedom of the watercraft can be restricted by the power transmission.

The advantageous effect of the variant lies in the functional integration of energy and power transmission in a single component. The variety of components can be reduced through the functional integration.

• - eine Ladeeinrichtung;
• - einen sekundären Energiespeicher;
• - einen elektrischen Verbraucher;

auf.According to the invention, the electrical system of the watercraft has:

• - a loading device;
• - a secondary energy storage device;
• - an electrical consumer;

on.

• - die Sekundärspule in elektrischer Verbindung mit der Ladeeinrichtung und/oder dem elektrischen Verbraucher steht;
• - die Ladeeinrichtung in elektrischer Verbindung mit dem sekundären Energiespeicher steht;
• - die Windungszahlen von Primär- und Sekundärspule gleich oder unterschiedlich sind.

The vehicle electrical system is characterized in that

• - The secondary coil is electrically connected to the charging device and/or the electrical consumer;
• - The charging device is electrically connected to the secondary energy store;
• - the number of turns of the primary and secondary coils are the same or different.

A charging device is understood to be any device that can increase the capacity, ie the amount of charge stored, of a secondary energy store. A charging device can have various electronic circuits, with which different charging methods can be implemented, for example rapid charging. Furthermore, a charging device can convert the type of voltage, for example from AC voltage to DC voltage and vice versa. In this case, a charging device is supplied with electrical energy at a connection point. An electrical component, preferably a secondary energy store, can be connected to a further connection point via an electrical connection.

A secondary energy store is an energy store whose amount of charge can be repeatedly reduced by discharging and increased by charging.

Different or the same number of turns between the primary and secondary coils allow the primary-side voltage to be transformed to the voltage value of the on-board electrical system of the watercraft.

• - eine Vorrichtung zur Energieübertragung;
• - ein Wasserfahrzeug.

According to the invention there is further provided a power transmission system. This includes at least:

• - a device for energy transmission;
• - a watercraft.

The subject matter of the invention is characterized in that the outboard fixing element of the watercraft is the stationary fixing element of the energy transmission device.

The energy transmission system combines an energy transmission device and a watercraft. The special feature is that a common stationary fixing element is part of the watercraft and the device for energy transmission.

An embodiment variant of the energy transmission system is characterized in that a bidirectional energy transmission can be carried out between the energy supply device of the device for energy transmission and the secondary energy store of the watercraft.

Bidirectional energy transmission can be understood as meaning the transmission of electrical energy between the energy supply device and the secondary energy store. The energy transmission system can thus be operated in the network of an intelligent electricity network (“smart grid”).

According to the invention, a method for controlling a power transmission system is further provided.

• 1 eine bevorzugte Ausführungsform des Energieübertragungssystems 10, umfassend eine Vorrichtung zur Energieübertragung 30, einen Landungskörper 20 sowie ein Wasserfahrzeug 90.
• 2 - 4 die am magnetischen Kreis beteiligten Komponenten. Dabei zeigt 2 den geöffneten und 3 den geschlossenen magnetischen Kreis, wobei in 3 weiterhin ein Tau 110 und eine Sekundärspule 130 dargestellt wird. Weiterhin bildet 4 eine Draufsicht der 3 ab.

Further advantages and advantageous embodiments and developments of the invention are presented on the basis of the following description with reference to the figures. It shows in detail:

• 1 a preferred embodiment of the energy transmission system 10, comprising a device for energy transmission 30, a landing body 20 and a watercraft 90.
• 2 - 4 the components involved in the magnetic circuit. while showing 2 the opened and 3 the closed magnetic circuit, where in 3 further a rope 110 and a secondary coil 130 is shown. Furthermore forms 4 a top view of the 3 away.

1 illustrates a preferred embodiment of an energy transmission system 10, comprising an energy transmission device 30, a landing body 20 and a watercraft 90.

The energy transmission system 10 can be implemented in two operating modes. In a first operating mode, an energy supply device 40 serves to provide electrical energy for the inductive transmission of energy from the landing body 20 to the watercraft 90. In a second operating mode, the energy supply device 40 serves to feed an energy distribution network, for example the public power grid, with electrical energy from a secondary energy store 160 of the watercraft 90. The energy transfer of electrical energy from the secondary energy store 160 to the energy supply device 40 and thus between the watercraft 90 and the device for energy transfer 30 also takes place inductively.

Regardless of the operating mode, the degrees of freedom of the watercraft 90 are restricted by means of a rope 110 . The power transmission takes place here between an on-board fixing element 100 of the watercraft 90 and a fixing element 70 located on the landing body 20. A landing body can be understood as a mooring point for watercraft, in the embodiment shown in the form of a quay or pier. In the present exemplary embodiment, a cleat is used as the onboard fixing element 100 and a bollard is used as the fixing element 70 . In addition to rope 110, a secondary coil 130 can also be used to limit the degrees of freedom, the power transmission is analogous to rope 110. The power transmission of the secondary coil is carried out by a strand for power transmission, this in the present embodiment by synthetic fibers, for example in the form of Dyneema , is trained.

In a first mode of operation, the charge of the secondary energy store in the form of a high-voltage store is first made with reference to FIG 1 explained. The energy transmission system 10 is supplied with electrical energy via the energy transmission device 30.

The device for energy transmission 30 comprises the energy supply device 40, a primary coil 50, a rotatably mounted L-shaped profile 60, the fixing element 70 and a web 80.

The rotatably mounted L-shaped profile 60, the fixing element 70 and the web 80 comprise ferromagnetic material, this resulting in the embodiment shown in the form of a metal core produced by powder metallurgy.

The energy supply device 40 can be supplied with electrical energy at a connection point in a number of ways, via a direct or indirect electrical connection. The electrical energy can be provided by direct connection to an energy distribution network or an indirect connection to an energy distribution network via a mobile charging station for motor vehicles, with the public electricity network being able to be used as an energy distribution network, for example.

Furthermore, electrical energy can be provided by local energy generation. A generator or a wind turbine, or an offshore or onshore wind farm, for example, can be used for this, although these are not shown in the corresponding figures. In both cases, the electrical energy can be supplied in the form of alternating voltage.

The primary coil 50 is located at a further connection point, with the two components being connected conductively and being able to be implemented, for example, by a screw connection. The conductive connection of the two components results in a current flow in the primary coil 50 due to the alternating voltage present. The current flow generates a magnetic field that changes over time in accordance with the applicable laws of physics. Since the primary coil 50 encloses the rotatably mounted L-shaped profile 60, the magnetic field generated is amplified due to the ferromagnetic material, and an effective electromagnetic connection between the primary coil 50 and the L-shaped profile 60 also results.

In this case, the magnetic field can be influenced by the output voltage of the energy supply device 40, with a time-varying magnetic field in the high-frequency range being desirable. The main influencing parameters include the type of voltage, the voltage level and the frequency of the voltage. In this exemplary embodiment, the energy supply device 40 has a preferred structure for varying the setting parameters. This structure includes at least one rectifier, one filter, one intermediate circuit, one inverter and control electronics. The preferred embodiment can also be applied to other exemplary embodiments.

The arrangement of the rotatably mounted L-shaped profile 60, the fixing element 70 and the web 80 results in a magnetic circuit with minimal reluctances, provided that the angle of rotation of the L-shaped profile 60 is selected so that an air gap 170 between the L-shaped profile 60 and fixing element 70 assumes the minimum possible value. Due to the magnetic circuit, the magnetic field lines are guided and concentrated. The fixing element 70 is surrounded by the secondary coil 130, as a result of which the secondary coil 130 is penetrated by the magnetic field that changes over time.

Furthermore, an effective electromagnetic connection results between the fixing element 70 and the secondary coil 130 and thus inevitably also between the primary coil 50 and the secondary coil 130. Due to the flux through the secondary coil 130, an induction voltage is induced in the strand for energy transmission of the secondary coil 130. The strand for energy transmission in the present exemplary embodiment results from metallic material made of copper. The number of turns in the secondary coil is 130 to be chosen such that the resulting induction voltage corresponds approximately to the voltage of an on-board network 120 of the watercraft 90 .

The secondary coil 130 is in conductive connection with the on-board electrical system 120 of the watercraft 90 and is therefore in electrical connection with an electrical consumer 140 and/or a charging device 150.

An electrical load 140 connected via the secondary coil 130 can be operated via the AC voltage present. In the exemplary embodiment shown, an electrical consumer can be understood to mean, for example, an on-board instrument, a lighting device in the form of a headlight, an air conditioning system, a control device, a cooling device in the form of a refrigerator and/or freezer, although these are not shown in the figures. Alternatively, the electrical load 140 can be operated with direct current by using an internal rectifier.

In the present operating mode, the charging device 150 is used to increase the amount of charge in the secondary energy store 160. The charging device 150 is supplied with electrical energy from the secondary coil 130 via a connection point. A secondary energy store 160 is located at a further connection point.

The charging device 150 contains various electronic circuits, with which different charging methods can be implemented, for example rapid charging. In the exemplary embodiment shown, the implementation of different charging methods is achieved in that the charging device has a preferred structure. This structure includes at least one rectifier, one filter, one intermediate circuit, one inverter and control electronics. The preferred embodiment can also be applied to other exemplary embodiments.

In a second operating mode, the energy supply device 40 of the energy transmission device 30 is used to feed an energy distribution network, for example the public electricity network and/or another electrical consumer, for example another watercraft and/or motor vehicle, with electrical energy from the secondary energy store 160 of the watercraft 90. Further electrical consumers in the form of a further watercraft and also in the form of a further motor vehicle are not shown in the figures.

The electrical connections of the vehicle electrical system 120 are implemented in the 2nd operating mode analogously to the 1st operating mode. During operation, the secondary energy store 160 supplies the charging device 150 with electrical energy. The charging device 150 converts the connected DC voltage into AC voltage by means of an inverter. As a result, a current that changes over time flows through the secondary coil 130, which generates a magnetic field that changes over time. Analogously to the first operating mode, an electromagnetic connection results between the secondary coil 130 and the primary coil 50. The magnetic field, which changes over time, generates an induction voltage in the primary coil 50, which is converted in the energy supply device 40 to the voltage level and frequency of the mains frequency of the energy distribution network to be supplied will. Finally, an energy distribution network, for example the public electricity network, is fed with the previously converted induction voltage.

2 shows that in 1 described embodiment with open magnetic circuit. In this embodiment, the rotatably mounted L-shaped profile 60, the fixing element 70 and the web 80 are components of a magnetic circuit. The rotational position of the L-shaped profile 60 shown is used to attach the cable 110 to the fixing element 70. Furthermore, the secondary coil 130 can be attached to the fixing element 70.

3 puts the in 2 described open magnetic circuit in a closed state. The rotational position of the L-shaped profile 60 is selected so that the air gap 170 between the L-shaped profile 60 and the fixing element 70 assumes the minimum possible value. This results in a closed magnetic circuit with minimal reluctance.

4 forms a plan view of the 3 and illustrates the resulting minimum value of the air gap 170 between the L-shaped profile 60 and the fixing element 70.

Reference List

10

power transmission system

20

landing body

30

Device for energy transfer

40

power supply device

50

primary coil

60

Rotatable L-shaped profile

70

Stationary fixation element

80

web

90

watercraft

100

Onboard fixing element

110

dew

120

electrical system

130

secondary coil

140

electrical consumer

150

loading device

160

Secondary energy storage

170

air gap

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• CN 207403894 U [0004]
• CN 110341505A [0005]

Claims (10)

Device for energy transmission (30) at least comprising: - an energy supply device (40); - a primary coil (50) electrically connected to the energy supply device; - a stationary fixing element (70) comprising ferromagnetic material; characterized in that the primary coil (50) can be brought into an effective electromagnetic connection with the stationary fixing element (70). Device for energy transmission (30) after claim 1 , wherein the stationary fixing element (70) is designed as an I-shaped profile. Device for energy transfer claim 1 , further comprising a rotatably mounted L-shaped profile (60) and a web (80), wherein - web (80) and L-shaped profile (60) comprise a ferromagnetic material; - A rotational position of the L-shaped profile (60) can be assumed, in which at least the L-shaped profile (60), the stationary fixing element (70) and the web (80) form a magnetic circuit. Device for energy transmission (30) according to the preceding claims, characterized in that the ferromagnetic material comprises a laminated metal core and/or a powder metallurgy metal core and/or a ferrite core. Watercraft (90) at least comprising: - an on-board network (120); - an onboard fixing element (100); - A secondary coil (130) which can be electrically connected to the vehicle electrical system (120) and mechanically connected to the on-board fixing element (100); characterized in that the secondary coil (130) can be brought into an operative electromagnetic connection with an outboard fixing element. watercraft (90) after claim 5 , characterized in that the secondary coil (130) comprises at least: - a strand for energy transmission; - a strand for power transmission. Watercraft (90) after one of Claims 5 or 6 , wherein the vehicle electrical system (120) comprises at least: - a charging device (150); - a secondary energy store (160); - An electrical consumer (140); characterized in that - the secondary coil (130) is electrically connected to the charging device (150) and/or the electrical consumer (140); - The charging device (150) is electrically connected to the secondary energy store (160); - The number of turns of the primary (50) and secondary coil (130) are the same or different. Energy transmission system (10) at least comprising: - a device for energy transmission (30) according to one of Claims 1 until 4 ; - A watercraft (90) according to any one of Claims 5 until 7 ; characterized in that the outboard fixing element of the watercraft is the fixed fixing element (70) of the energy transmission device (30). Energy transmission system (10) after claim 8 , characterized in that a bidirectional energy transmission between the energy supply device (40) of the device for energy transmission (30) and the secondary energy store (160) of the watercraft (90) can be carried out. Method for controlling an energy transmission system (10) according to the Claims 8 or 9 .

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