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RU-2861613-C1 - WAVE BUOY POWER PLANT

RU2861613C1RU 2861613 C1RU2861613 C1RU 2861613C1RU-2861613-C1

Abstract

FIELD: power engineering. SUBSTANCE: invention relates to the production of electric energy due to vertical oscillation of waves on a water surface. The wave buoy power plant comprises a sealed housing in the form of a vertical buoy [1] with an extension for a buoy zone [2]. Inside the sealed housing along the vertical axis of the buoy [1] there is at least one linear generator comprising a stator and a rotor. The stator is made of at least one printed circuit board. The stator winding [14] is formed by electrically conductive tracks of the printed circuit board. The stator is attached to a longitudinal rod [4] connected to an anchor. The rod [4] is configured to perform reciprocating movement relative to the housing wall of the buoy [1] and permanent magnets [13] of the rotor, oppositely arranged on magnetically conductive plates [11] on both sides of the stator and fixed from the inside of the buoy housing [1]. Inside the rod [4] there is an electric cable [16] leading from the stator to a consumer. EFFECT: increasing the efficiency of converting wave kinetic energy into electrical energy, increasing the reliability and operability of the installation. 5 cl, 10 dwg

Inventors

  • Kozlov Dmitrii Iurevich

Dates

Publication Date
20260506
Application Date
20250825

Claims (11)

  1. 1. A wave floating power plant containing a sealed housing in the form of a vertical buoy [1] with an extension for the float zone [2],
  2. in this case, at least one linear generator containing a stator and a rotor is placed in a sealed housing along the vertical axis of the buoy,
  3. wherein said power plant comprises a longitudinal rod [4] configured to perform a reciprocating motion relative to the wall of the sealed buoy housing [1] and permanent magnets [13] of the rotor,
  4. characterized in that the stator is made from at least one printed circuit board, and the stator winding [14] is formed by electrically conductive tracks of the printed circuit board,
  5. in this case the stator is attached to a longitudinal rod [4] connected to the anchor,
  6. the permanent magnets [13] of the rotor are located oppositely on the magnetically conductive plates [11] on both sides of the stator and are secured inside the buoy body,
  7. At the same time, an electric cable [16] is placed inside the rod, leading from the stator to the consumer.
  8. 2. A wave float power plant according to paragraph 1, characterized in that the stators of the linear generators have a single-phase winding.
  9. 3. A wave float power plant according to paragraph 2, characterized in that the single-phase stators of the generators have an additional phase shift relative to each other and together form a single multi-phase stator winding.
  10. 4. A wave float power plant according to paragraph 1, characterized in that the stators of the linear generators have a multiphase winding.
  11. 5. A wave float power plant according to claim 1, characterized in that it contains a printed circuit board with conductive tracks of a stator winding [14], made in the form of concentric coils located on a minimum of two layers of the printed circuit board with the number of coils on each layer equal to the number of poles, the coils on each of the two layers are connected in pairs in opposite series and in series - by means of a metallized hole in the center of the coils - with other pairs on another layer to form a closed electrical circuit, wherein each two mentioned layers can be connected in parallel and/or in series with the other two layers of the printed circuit board.

Description

Technical area The invention relates to electric power engineering, namely to the production of electric power due to the vertical oscillation of waves on the water surface, and can be used to supply electricity to coastal/island areas, remote marine facilities (aquaculture farms), navigation buoys, telecommunications and other devices located in the sea/ocean or on islands. Prior art A wave energy plant is known (patent RU 2666258, Gladyshev A.V., priority dated 25.01.2018) [1], fixed to stationary structures and containing a stator winding made of wire, integrated into an outer cylindrical casing and laid in rings on its inner side without the use of a core, and a ring magnet installed outside the float, wherein the float is located inside the cavity of the cylindrical casing and performs reciprocating movements along an axial guide and is held by it. The known solution has low electromagnetic efficiency due to a decrease in the magnetic field induction caused by the free distribution of magnetic field lines from one pole of the magnet to another without the presence of a core and/or a nearby opposite pole of another magnet, as well as a significant gap between the stator winding and the magnet. In addition, the device's functionality may be completely blocked if the internal cavity becomes overgrown with mollusks and algae, as well as with significant fluctuations in water levels, for example, caused by high/low tides. Also known is a linear generator for a wave power plant (patent CN 119154622, Research Institute of CSIC, priority dated 18.09.2024) [2], consisting of a plurality of single-phase linear generators located on the side faces of a prismatic support frame, with magnets of alternating polarity laid on a moving rotor core, and the stator winding consists of coils wound with wire and laid in the grooves of the stator core, with the single-phase generators having the necessary phase shift, allowing them to be combined into a single multi-phase generator. The solution [2] is based on the classical structure of an electric machine with a stator core that closes the magnetic lines of permanent magnets, which requires the use of a large volume of iron, leads to an increase in weight and dimensions, losses due to magnetization reversal, eddy currents in the stator core and magnetic sticking, and in total narrows the scope of use of this device and its efficiency. A wave energy installation for generating electric power is known (patent EP 1474607, Seabased AB, priority from 10.01.2002) [3], containing a float floating on the surface of the water, mechanically connected to a rotor with permanent magnets of alternating polarity installed on it, wherein the stator contains a winding with a plurality of poles in the direction of movement of the rotor and is integrated into a base installed on the bottom of the sea or lake, and the rotor has the shape of a regular polygon, on each side of which permanent magnets are placed, and the number of linear stators with windings consisting of coils wound with wire and laid in the grooves of the stator core is equal to the number of sides of the polygon. The existing solution is also based on the classic design of a linear generator, comprising a massive stator core and stator winding coils wound with wire and placed in the core's slots. However, no practical implementation is provided for the use of special guide elements to maintain the gap between the rotor and the stator winding. Without these, the gap could be several centimeters, reducing the magnetic field induction in the gap and the overall electromagnetic efficiency of the device. A solution to the problem of mollusc and algae growth on the structure is also not disclosed. Task and technical results The objective of the claimed invention is to create a reliable, simple, and highly efficient wave power plant based on a linear generator with a high degree of readiness for industrial implementation and an innovative solution in the use of a printed circuit board for the stator winding. The technical results achieved by the claimed invention include increasing the efficiency of converting wave kinetic energy into electrical energy, as well as increasing the reliability and operability of the device. Solution to the problem To solve the problem, a wave float power plant is proposed, containing a sealed housing in the form of a vertical buoy with an extension for the float zone, wherein in the sealed housing along the vertical axis of the buoy there is placed at least one linear generator, containing a stator and a rotor, wherein said power plant contains a longitudinal rod, made with the possibility of performing a reciprocating movement relative to the wall of the buoy housing and permanent magnets of the rotor, characterized in that the stator is made of at least one printed circuit board, and the stator winding is formed by electrically conductive tracks of the printed circuit board, wherein the stator is at