KR102653031B1 - Wireless charging system of electric ship - Google Patents

Abstract

A wireless charging system for electric ships is introduced.
The wireless charging system for electric ships includes an ultrasonic transmitter provided in the ocean, an ultrasonic receiver mounted on an electric ship operating in the ocean and receiving ultrasonic waves generated from the ultrasonic transmitter, converting the received ultrasonic waves into electrical energy, and converting the converted electrical energy into electrical energy. It may include an electric converter that charges the electric battery of the electric ship.

Description

Wireless charging system for electric ships {WIRELESS CHARGING SYSTEM OF ELECTRIC SHIP}

The present invention relates to a wireless charging system for electric ships.

Typically, ships drive propeller shafts with diesel engines or steam turbines.

Recently, electric propulsion ships have been developed and used by using electric propulsion, in which a generator is driven by a main engine and an electric motor is driven by the electric power. However, since electric propulsion ships operate generators by the main engines of diesel engines or steam turbines, it is difficult to view them as ships using pure electric power in that the use of fossil fuels is inevitable.

Accordingly, the development of electric ships that obtain propulsion solely from batteries and motors is underway. Electric ships can not only cope with the increase in fuel costs due to the depletion of fossil fuels, but also reduce environmental pollution by using clean fuel.

However, electric ships have limitations in long-distance navigation because there is a limit to the charging capacity of electric batteries that can charge electric energy.

Patent Document 1: Domestic Patent Publication No. 10-2010-0065542 (published on June 17, 2010) Patent Document 2: Domestic Patent Publication No. 10-2014-0082628 (published on July 2, 2014)

Embodiments of the present invention seek to provide a wireless charging system for electric ships that can supply electric energy converted from ultrasonic waves to electric ships operating long distances.

A wireless charging system for an electric ship according to an aspect of the present invention includes an ultrasonic transmitter provided in the ocean; An ultrasonic receiver mounted on an electric ship operating on the ocean and receiving ultrasonic waves generated from the ultrasonic transmitter; and an electric converter that converts the received ultrasonic waves into electric energy and charges the converted electric energy in the electric battery of the electric ship.

In addition, the present invention may further include a power cable extended on the sea floor along the navigation route of the electric ship and electrically connected to the ultrasonic transmitter.

Additionally, the ultrasonic transmitter includes a main body electrically connected to a power cable; an ultrasonic generation unit built into the main body and generating ultrasonic waves using electrical energy supplied from the power cable; And it may include a transmission antenna provided on the upper part of the main body to transmit the ultrasonic waves toward the ultrasonic receiver.

In addition, the main body includes a file that can be fixed to the sea floor; a mobile body whose lower end is detachable from the file and where the transmitting antenna is mounted on its upper end; and a connecting cable connecting the file and the moving object.

In addition, the ultrasonic transmitter includes an information receiving unit that receives ship position information of an electric ship sailing on the ocean; an actuator for winding or rewinding the connecting cable from the file so that the length of the connecting cable is adjusted; And to determine whether the electric ship has entered a preset area through the ship location information, and when it is determined that the electric ship has entered a preset area, to move the moving object closer to the point where the electric ship is located. It may further include a controller that applies an operating signal to the actuator.

Additionally, the mobile body may include a floating body for floating from the sea floor to the surface of the water.

Embodiments of the present invention can convert ultrasonic waves into electrical energy and supply the converted electrical energy to an electric ship in operation, thereby making it unnecessary to install a large-capacity electric battery in an electric ship, thereby making it possible to install a large-capacity electric battery. The advantage is that it can reduce necessary costs.

In addition, embodiments of the present invention have the advantage of being universally applicable to existing electric ships because no additional equipment other than an ultrasonic receiver is required in the case of electric ships generating power through oil/gas.

In addition, since embodiments of the present invention can be applied in connection with offshore wind power generation and ocean current power generation, there is an advantage in increasing the added value of eco-friendly energy utilization.

Figure 1 is a configuration diagram illustrating a wireless charging system for an electric ship according to an embodiment of the present invention.
FIG. 2 is an enlarged view showing part “A” of FIG. 1.
Figure 3 is a configuration diagram showing a wireless charging system for an electric ship according to another embodiment of the present invention.
Figure 4 is an enlarged view showing an ultrasonic receiver of a wireless charging system for an electric ship according to another embodiment of the present invention.
Figure 5 is a block diagram showing the control logic of an ultrasonic receiver in a wireless charging system for an electric ship according to another embodiment of the present invention.

Hereinafter, the configuration and operation according to an embodiment of the present invention will be described in detail with reference to the attached drawings. The following description is one of several aspects of the invention that can be claimed for patent, and the following description may form part of a detailed description of the invention. However, when describing the present invention, detailed descriptions of well-known structures or functions may be omitted for clarity of the present invention.

Since the present invention can make various changes and include various embodiments, specific embodiments will be illustrated in the drawings and described in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

And terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used only to distinguish one component from another. When a component is said to be 'connected' or 'connected' to another component, it is understood that it may be directly connected or connected to the other component, but that other components may exist in between. It should be. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 1 is a configuration diagram illustrating a wireless charging system for an electric ship according to an embodiment of the present invention, and FIG. 2 is an enlarged view illustrating portion “A” of FIG. 1 .

As shown in Figures 1 and 2, the wireless charging system 10 for an electric ship according to an embodiment of the present invention includes an ultrasonic transmitter 100, an ultrasonic receiver 200, an electrical converter 300, and a power cable. It may include (400).

Specifically, a plurality of ultrasonic transmitters 100 may be provided in the ocean. A plurality of ultrasonic receivers 200 may be arranged to be spaced apart from each other on the sea floor (G). Preferably, the plurality of ultrasonic receivers 200 may be arranged to be spaced apart on the sea floor (G) along the expected navigation route of the electric vessel (V).

The ultrasonic transmitter 100 can generate ultrasonic waves by receiving electrical energy through the power cable 400, and transmit the generated ultrasonic waves to the electric vessel (V) using seawater as a medium.

In this embodiment, the ultrasonic transmitter 100 receives electrical energy through the power cable 400, but is not limited thereto, and may receive electrical energy from various electrical sources in addition to the power cable 400. For example, the ultrasonic transmitter 100 may receive electrical energy from power generation equipment installed in the ocean (solar power generation equipment, wind power generation equipment, tidal power generation equipment, etc.).

This ultrasonic transmitter 100 may include a main body 110, an ultrasonic generation unit 120, and a transmission antenna 130. The main body 110 may be electrically connected to the power cable 400. An ultrasonic generation unit 120 may be provided inside the main body 110. The ultrasonic generation unit 120 may generate ultrasonic waves using electrical energy supplied from the power cable 400. Since the ultrasonic generation unit 120 has a configuration corresponding to a typical ultrasonic generator that generates ultrasonic waves, a detailed description thereof will be omitted.

The transmission antenna 130 may transmit ultrasonic waves generated by the ultrasonic generation unit 120 toward the ultrasonic receiver 200. The transmitting antenna 130 may be provided on the top of the main body 110 to face the electric vessel (V). Of course, depending on the direction in which the electric vessel (V) is located, the directionality of the transmitting antenna 130 at the top of the main body 110 may vary.

The ultrasonic receiver 200 may be mounted on an electric ship (V) operating on the ocean. The ultrasonic receiver 200 may be provided at the bottom of the electric vessel (V) in order to easily receive ultrasonic waves transmitted from the ultrasonic transmitter 100 on the sea floor (G).

The electrical converter 300 may convert ultrasonic waves received through the ultrasonic receiver 200 into electrical energy. To this end, the electrical transducer 300 may include a transducer (not shown) that converts ultrasonic waves into electrical energy. Since the electrical converter 300 is a configuration that corresponds to an electrical converter using conventional ultrasonic power transmission technology that converts ultrasonic waves into electrical energy, a detailed description thereof will be omitted.

The electrical converter 300 can charge the electrical energy converted through the transducer into an electric battery (not shown). The electric ship (V) can use the electric energy charged in the electric battery for various equipment required for navigation.

The power cable 400 may be extended and disposed on the sea floor (G) along the expected navigation route of the electric vessel (V). The power cable 400 is electrically connected to the ultrasonic transmitter 100, thereby providing electrical energy to the ultrasonic transmitter 100.

Figure 3 is a configuration diagram showing a wireless charging system for an electric ship according to another embodiment of the present invention, and Figure 4 is an enlarged view showing an ultrasonic receiver of a wireless charging system for an electric ship according to another embodiment of the present invention. , FIG. 5 is a block diagram showing the control logic of an ultrasonic receiver in a wireless charging system for an electric ship according to another embodiment of the present invention.

3 to 5, in the wireless charging system 10 for an electric ship according to another embodiment of the present invention, the ultrasonic transmitter 100 transmits ultrasonic waves to the electric ship (V) using air as a medium in the atmosphere. It can be transmitted to. At this time, depending on the ultrasonic characteristics that are the basis of ultrasonic power transmission technology, differences in the speed of ultrasonic waves may occur due to changes in the medium.

The ultrasonic transmitter 100 can levitate the transmission antenna 130 above sea level. To this end, the ultrasonic transmitter 100 may include a main body 110, an ultrasonic generation unit 120, a transmitting antenna 130, an information receiving unit 140, an actuator 150, and a controller 160. Here, the remaining components except for the information receiving unit 140, the actuator 150, and the controller 160 may be similar or substantially the same as the configuration described in one embodiment, so the description of the previously described configuration and operation is limited to It may be omitted, and similar reference numerals may be assigned to similar components.

However, the main body 110 of the ultrasonic transmitter 100 includes a wedge-shaped pile 111 that can be fixed to the sea floor (G), a moving body 112 that is detachable from the pile 111, and the pile 111 and the moving body. (112) may include a connecting cable (113) connecting between them.

In order to attach and detach the moving body 112 from the pile 111, a device (for example, a clamping device) that can be attached to or detached from the pile 111 may be provided at the lower end of the moving body 112. A transmitting antenna 130 may be mounted on the upper part of the mobile body 112. The transmitting antenna 130 may be oriented horizontally to transmit ultrasonic waves toward the electric vessel (V) on the sea surface.

In addition, the mobile body 112 may include a floating body (not shown) with a specific gravity lighter than seawater in order to rise from the sea floor (G) to the sea surface. Accordingly, when the mobile body 112 is separated from the pile 111, the mobile body 112 can be levitated from underwater to the sea surface using the floating function of the floating body. The height at which the mobile object 112 can float may be changed according to the length adjustment of the connecting cable 113.

Additionally, the connecting cable 113 may electrically connect the power cable 400 and the ultrasonic generation unit 120. Electrical energy from the power cable 400 may be received and transmitted to the ultrasonic generation unit 120.

Additionally, the connecting cable 113 may be wound around a winding shaft (not shown) provided inside the pile 111. The connecting cable 113 may be wound or rewinded on the winding shaft by the operation of the actuator 150. For example, when the connecting cable 113 is wound around the winding shaft by the operation of the actuator 150, the moving body 112 can be pulled and moved downward. When the connecting cable 113 is rewinded on the winding axis by the operation of the actuator 150, the moving body 112 can be moved upward.

The information receiving unit 140 may receive vessel location information of an electric vessel (V) sailing on the ocean. For example, information receiving unit 140 may receive GPS information providing the current location of electric vessel V.

The actuator 150 may be provided on the pile 111 of the ultrasonic transmitter 100. The actuator 150 can lift and lower the mobile body 112 of the ultrasonic transmitter 100 in water. For example, the actuator 150 can lift and lower the mobile body 112 underwater by winding or rewinding the connecting cable 113.

The controller 160 may determine whether the electric vessel V has entered a preset area through the vessel location information received from the information receiving unit 140. When it is determined that the electric vessel (V) has entered the preset area, the controller 160 sends an operation signal to the actuator 150 to move (float) the moving object 112 closer to the point where the electric vessel (V) is located. It can be approved.

As described above, the present invention can convert ultrasonic waves into electrical energy and supply the converted electrical energy to an electric ship in operation, thereby making it unnecessary to install a large-capacity electric battery in the electric ship, thereby making it possible to install a large-capacity electric battery in the electric ship. The cost of installation can be reduced, and in the case of electric ships that generate power through oil/gas, no additional equipment other than ultrasonic receivers is required, so it can be universally applied to existing electric ships, and can be used for offshore wind power generation and Since it can be applied in connection with ocean current power generation, etc., it has the advantage of increasing the added value of eco-friendly energy utilization.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features. You will be able to understand it. For example, a person skilled in the art may change the material, size, etc. of each component depending on the field of application, or combine or substitute embodiments to implement the present invention in a form not clearly disclosed in the embodiments of the present invention, but this is also the present invention. It does not go beyond the scope of. Therefore, the embodiments described above are illustrative in all respects and should not be understood as limiting, and such modified embodiments should be considered to be included in the technical idea described in the claims of the present invention.

100: Ultrasonic transmitter 110: Main body
111: File 112: Moving object
113: Connecting cable 120: Ultrasound generation unit
140: Information receiving unit 150: Actuator
160:Controller 200:Ultrasonic receiver
300:Electrical converter

Claims (6)

ultrasonic transmitters provided to the ocean;
An ultrasonic receiver mounted on an electric ship operating on the ocean and receiving ultrasonic waves generated from the ultrasonic transmitter; and
It includes an electric converter that converts the received ultrasonic waves into electric energy and charges the converted electric energy in the electric battery of the electric ship,
The ultrasonic transmitter is
A body electrically connected to a power cable;
an ultrasonic generation unit built into the main body and generating ultrasonic waves using electrical energy supplied from the power cable;
and a transmitting antenna provided on the upper part of the main body to transmit the ultrasonic waves toward the ultrasonic receiver.
An information receiving unit that receives ship position information of an electric ship sailing on the ocean; an actuator for winding or rewinding the connecting cable on a file so that the length of the connecting cable is adjusted; and
Whether the electric ship has entered a preset area is determined through the ship location information, and when it is determined that the electric ship has entered a preset area, an operation signal is provided to move the moving object closer to the point where the electric ship is located. A wireless charging system for an electric ship, comprising a controller that applies to the actuator. According to claim 1,
It extends on the sea floor along the navigation route of the electric ship and further includes a power cable electrically connected to the ultrasonic transmitter,
The body is
Piles that can be fixed to the seabed;
a mobile body whose lower end is detachable from the file and where the transmitting antenna is mounted on its upper end; and
A wireless charging system for an electric ship, comprising a connecting cable connecting the file and the moving object. delete delete delete delete

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