CN201549978U - Magnetic Gear Linear Generator for Ocean Wave Power Generation - Google Patents

Abstract

The utility model relates to a magnetic gear linear generator used for ocean wave power generation. The generator includes a cylindrical permanent magnet synchronous linear motor and a cylindrical linear magnetic gear. The permanent magnet synchronous linear motor includes a motor primary, The secondary side of the motor, the primary side of the motor includes a primary core (1), a primary winding (2), the primary winding (2) is embedded in the slot of the primary core (1), and the primary core (1) is fixed on the seabed; the secondary side of the motor includes a high-speed side (3); the linear magnetic gear includes a high-speed side (3), an intermediate magnetic ring (4), a low-speed side (5) and an iron core (6), wherein the high-speed side (3) and the low-speed side (5) are permanent The magnet is provided with a low-speed side (5) on the outside of the iron core (6), an intermediate magnetic ring (4) is provided on the outer side of the low-speed side (5), and a high-speed side ( 3), on the outer side of the high-speed side (3) is the primary iron core (1), and the intermediate magnetic ring (4) is fixed on the seabed; the low-speed side (5) is connected with the buoy (8), and the buoy (8) floats on the sea surface (9 )superior.

Description

Magnetic Gear Linear Generator for Ocean Wave Power Generation

technical field

The utility model relates to an ocean wave linear generator driven by a magnetic gear, in particular to a cylindrical permanent magnet linear synchronous generator applied to ocean wave power generation. The invention relates to the fields of electrician and motor.

Background technique

The global population continues to expand, and energy and environmental problems are becoming more and more serious. People have to find new energy sources to solve the current crisis. The ocean area accounts for about 70% of the global surface area, and ocean energy is one of the most abundant energy reserves on the earth. Ocean energy refers to the renewable energy attached to seawater, which stores and exchanges energy through various forms such as tides and waves. After nearly 40 years of research, scholars at home and abroad have proposed a variety of wave power generation methods, but most of them use various mechanical devices to convert the reciprocating linear motion of waves into rotary motion, and then convert energy by rotating motors. In recent years, some scholars It is proposed to use a linear motor to directly convert the linear motion of ocean waves into electrical energy without any intermediate conversion mechanism, and the efficiency can be improved. However, regardless of whether a rotary motor or a linear motor is used, due to the slow motion of the waves, the volume and mass of the generator are generally large, and the manufacturing cost is relatively high. Reduced system efficiency, need for regular maintenance and other issues. The use of magnetic gear transmission can not only solve the contradiction between the wave motion speed and the volume of the generator, but also avoid the loss and heat caused by the direct contact of the traditional gearbox. It does not need lubrication, no mechanical wear, no noise, and has a large Good anti-overload ability can effectively reduce the damage caused by strong wind and waves to the system.

Contents of the invention

Technical problem: This utility model is designed for the deficiencies of the existing technology, the purpose is to reduce the operation loss of the wave power generation system, improve the system efficiency, combined with the characteristics of the wave reciprocating linear motion and slow motion speed, a kind of wave power generation system is proposed. Magnetic gear linear generator, applied to ocean wave power generation.

Technical solution: The magnetic gear linear generator used for ocean wave power generation of the utility model is used for off-shore ocean wave power generation. The low-speed side of the magnetic gear is driven by the buoy using the undulating motion of the ocean wave, and the secondary side of the linear generator is driven by the magnetic gear to improve the power consumption of the linear generator. The low linear reciprocating speed provided by the waves. The primary and winding of the linear motor are fixed on the seabed, and the secondary permanent magnet of the linear motor cuts the primary winding in a static state when it reciprocates, generating an induced electromotive force. Since the frequency and speed of sea waves are not constant, the present invention converts the generated electromotive force into a power frequency through a converter, so that the electric energy can be transmitted to the power grid or directly used by electrical appliances.

The generator includes a cylindrical permanent magnet synchronous linear motor and a cylindrical linear magnetic gear. The permanent magnet synchronous linear motor includes a motor primary and a motor secondary. The motor primary includes a primary iron core and a primary winding. The primary iron core is fixed On the seabed, the primary winding is embedded in the slot of the primary iron core; the secondary side of the motor includes the high-speed side; the linear magnetic gear includes the high-speed side, the intermediate magnetic ring, the low-speed side and the iron core, and the high-speed side and the low-speed side are both permanent magnets. There is a low-speed side on the outer side of the iron core, an intermediate magnetic ring is provided on the outer side of the low-speed side, a high-speed side is arranged on the outer side of the intermediate magnetic ring, and a primary iron core is arranged on the outer side of the high-speed side, and the intermediate magnetic ring is fixed on the seabed; The side is connected with the buoy, and the buoy floats on the sea surface; there is a first air gap between the primary iron core and the high-speed side; a second air gap is set between the high-speed side and the intermediate magnetic ring; third air gap.

The high-speed side and the low-speed side are respectively rings made of a plurality of radially magnetized permanent magnet materials, arranged in sequence along the axial direction to form a cylindrical shape, and two adjacent radially magnetized permanent magnet materials are made of The magnetization direction of the ring is opposite, so that the magnetic field is distributed sinusoidally along the axis.

The intermediate modulation magnetic ring is made of ferromagnetic material and non-magnetic material and arranged at intervals along the axial direction to form a cylindrical shape.

Beneficial effects: the magnetic gear linear generator used for ocean wave power generation has the following beneficial effects:

1) Ocean wave energy is a recyclable and clean energy source, and the present invention does not produce pollution and noise;

2) Replacing the traditional rotary motor with a linear motor, the part that converts the reciprocating linear motion of the ocean wave into a rotary motion is omitted, with a simple, compact structure and high power density;

3) The movement speed of the low-speed side of the magnetic gear is accelerated by the magnetic gear to reduce the volume of the generator, avoiding the loss and heat caused by the direct contact of the traditional gearbox transmission, no lubrication, no mechanical wear, no noise, and has a very Good anti-overload ability can effectively reduce the damage caused by strong wind and waves to the system.

4) The system has compact structure and high power density.

5) The rare earth permanent magnet NdFeB is used, and the air gap magnetic field is modulated by the magnetic adjustment ring, so the thrust density is high.

Description of drawings

Fig. 1 is the inner low-speed outer high-speed structure (structure 1) in the magnetic gear linear generator used for ocean wave power generation,

Fig. 2 is the outer low-speed inner high-speed structure (structure two) in the magnetic gear linear generator used for ocean wave power generation,

In the figure there are: primary iron core 1, primary winding 2, high speed side 3, intermediate magnetic ring 4, low speed side 5, iron core 6, coupling shaft 7, buoy 8, sea surface 9, first air gap 10, second air gap 11 , The third air gap 12 .

Detailed ways

The first structure:

The magnetic gear linear generator used for ocean wave power generation of the present utility model includes a cylindrical permanent magnet synchronous linear motor and a cylindrical linear magnetic gear. The permanent magnet synchronous linear motor includes a motor primary, a motor secondary stage, the motor primary includes primary core 1, primary winding 2, primary winding 2 is embedded in the slot of primary core 1, and primary core 1 is fixed on the seabed; the secondary of the motor includes high-speed side 3; the linear magnetic gear includes high-speed side 3, middle Magnetic adjustment ring 4, low-speed side 5 and iron core 6, wherein high-speed side 3 and low-speed side 5 are permanent magnets, low-speed side 5 is provided outside iron core 6, and intermediate magnetic adjustment ring 4 is provided outside low-speed side 5 , there is a high-speed side 3 on the outside of the intermediate magnetic ring 4, and a primary iron core 1 on the outer side of the high-speed side 3, and the intermediate magnetic ring 4 is fixed on the seabed; the low-speed side 5 is connected with the buoy 8, and the buoy 8 floats on the sea surface 9 ; There is a first air gap 10 between the primary core 1 and the high-speed side 3; a second air gap 11 is provided between the high-speed side 3 and the intermediate magnetic ring 4; a third air gap is provided between the intermediate magnetic ring 4 and the low-speed side 5 air gap12.

The second structure has no iron core 6 and connecting shaft 7 parts.

The primary iron core 1 is made of ordinary silicon steel sheet material, which is the same as the manufacturing process of ordinary linear motors.

The primary winding 2 adopts a distributed winding to reduce the harmonic component of the induced electromotive force.

The secondary, that is, the high-speed side 3 of the magnetic gear is a ring made of radially magnetized rare earth permanent magnet NdFeB material, arranged in sequence along the axial direction to form a cylindrical shape, and the magnetization of two adjacent permanent magnet rings The direction is opposite, so that the magnetic field is distributed sinusoidally along the axis.

Said magnetic gear intermediate magnetic adjustment ring 4 is made of ferromagnetic material and non-magnetic material, and the rings are arranged at intervals along the axial direction, forming a cylindrical shape.

The low-speed side 5 of the magnetic gear is made of a ring made of radially magnetized rare earth permanent magnet NdFeB material, arranged in sequence along the axial direction to form a cylindrical shape, and the magnetization directions of two adjacent permanent magnet rings are opposite, so that The magnetic field is distributed sinusoidally along the axis.

In the first structure, the linear motor primary core 1 and primary winding 2 are outside the generator, and the magnetic gear is inside, which is a low-speed inside and high-speed outside structure. The primary of the motor and the magnetic gear adjusting ring are fixed on the seabed, and the middle iron core 6 on the low-speed side of the magnetic gear is made of ferromagnetic material. It is connected with the buoy 8 through the connecting rod 7 to input mechanical energy. The speed is increased by the magnetic gear, the secondary of the linear motor makes a linear reciprocating motion, and the permanent magnet cuts the primary winding 2 to generate an induced electromotive force.

In the second structure, the linear motor primary core 1 and primary winding 2 are inside the generator, and the magnetic gear is outside, which is a low-speed outside and high-speed inside structure. The primary motor and the magnetic gear adjusting ring are fixed on the seabed and are stationary, and the low-speed side 5 of the magnetic gear is directly installed in the buoy 8 to form a whole and input mechanical energy. The speed is increased by the magnetic gear, the secondary of the linear motor makes a linear reciprocating motion, and the permanent magnet cuts the primary winding 2 to generate an induced electromotive force.

Claims (4)

1. magnetic gear linear electric generator that is used for seawave power generation, it is characterized in that this generator comprises a cylindrical permanent linear synchronous motor and a cylindrical linear magnetic gear, permanent magnetic linear synchronous motor comprises electric motor primary, motor secondary, this electric motor primary comprises elementary iron core (1), elementary winding (2), elementary winding (2) embeds in the wire casing of elementary iron core (1), and elementary iron core (1) is fixed in the seabed; Motor secondary comprises high-speed side (3); Straight line magnetic gear comprises high-speed side (3), middle tone magnet ring (4), low speed side (5) and iron core (6), wherein, high-speed side (3), low speed side (5) are permanent magnet, the outside in (6) unshakable in one's determination is provided with low speed side (5), be provided with middle tone magnet ring (4) in the outside of low speed side (5), being provided with high-speed side (3) in the outside of middle tone magnet ring (4), is elementary iron core (1) in the outside of high-speed side (3), and middle tone magnet ring (4) is fixed in the seabed; Low speed side (5) links to each other with floating drum (8), and floating drum (8) swims on the sea (9); Be provided with first air gap (10) between elementary iron core (1) and the high-speed side (3); Be provided with interstice (11) between high-speed side (3) and the middle tone magnet ring (4); Middle tone magnet ring (4) is provided with the 3rd air gap (12) with low speed side (5).

2. the magnetic gear linear electric generator that is used for seawave power generation according to claim 1 is characterized in that magnetic gear low speed side links to each other with floating drum (8), and input wave energy improves permanent magnetic linear synchronous motor collateral motion speed by the magnetic gear.

3. the magnetic gear linear electric generator that is used for seawave power generation according to claim 1, it is characterized in that described high-speed side (3), low speed side (5) are respectively the rings of being made by the permanent magnetic material of a plurality of radial magnetizings, be arranged in order the formation cylinder type vertically, its magnetizing direction of the ring that the permanent magnetic material of adjacent two radial magnetizings is made is opposite, makes magnetic field vertically by Sine distribution.

4. the magnetic gear linear electric generator that is used for seawave power generation according to claim 1 is characterized in that the central spacer that described middle tone magnet ring (4) is made by ferromagnetic material and non-magnet material constitutes cylinder type.