CN201038976Y - Permanent magnetic line surf generator - Google Patents

Abstract

A permanent magnet linear sea wave generator relates to a permanent magnet linear synchronous motor, including a motor primary and a motor secondary, the permanent magnet linear synchronous motor primary includes primary iron cores (2) and a primary three-phase winding (3), the primary three-phase winding (3) is embedded in a wire slot of the primary iron core (2); the motor secondary includes a secondary permanent magnet (1), the secondary permanent magnet (1) is arranged on a float (6) by a spring (5); the bottom part of a container containing the linear generator device is fixed at the sea bottom; the motor primary and the motor secondary of the linear generator are both rectangular structure, the secondary permanent magnet (1) is positioned between the two primary iron cores (2), and an air gap (4) is arranged between the secondary permanent magnet (1) and the two primary iron cores (2). The utility model takes the linear motor to replace traditional rotating generators, does not need contact drive and can reduce dielectric loss and improve the power generation efficiency; the utility model can withstand the pressure of wave, and is not easy to be damaged; the utility model does not generate toxic gas and has no additional noise, which is environmental protective and healthy; the cost is low and is equivalent to the cost of the conventional power generation.

Description

Permanent magnet linear wave generator

technical field

The utility model relates to a permanent magnet linear synchronous motor, in particular to a permanent magnet linear synchronous generator used for ocean wave power generation, and the invention belongs to the field of motors.

Background technique

Ocean waves are an important renewable energy source. According to estimates by the World Energy Association, the reserves of ocean wave resources worldwide are as high as 2TW or more, which is equivalent to the sum of all other forms of energy in the world. If 0.1% of them are converted into electrical energy , it will exceed 5 times the current world electricity consumption. In the 1970s, due to the oil crisis, people began to study marine renewable energy such as waves and tides, and deeply explored the mechanism and feasibility of using wave power to generate electricity. Over the past 30 years, scientists from various countries have worked hard to explore several ways of generating electricity from waves. People have developed a wave power station on the shore. The basic principle is: build a power cabin with a width of 23 meters on the coast, and the power cabin has A channel for seawater to pour in; when seawater pours into the power cabin, the water body in the cabin can slosh back and forth under the action of seawater; the resulting air flow has enough power to drive the turbine generator. Its principle is the same as that of using water to drive a generator, but the difference is that ocean wave power generation uses air flow instead of water flow. This form of power station is already in use in the UK, and the electricity generated is already connected to the grid.

CN1885692A discloses an invention "wave power generation device" by the inventor, which relates to a wave power generation device, which is composed of a power generation platform, a platform automatic lifting mechanism, a float and its transmission mechanism. On the vertical column, a horizontal air chamber is fixed on the side facing the waves, and a vertical air chamber is fixed on the upper side. The lower end of a rack connected to the transmission mechanism is fixed, the vertical air chamber, the guide block and the lower part of the rack are all set in the guide sleeve fixed with the float, and the transmission mechanism and the generator are fixed on the power generation platform above the float , the power generation platform is installed on the column through the platform automatic lifting mechanism. It has similarities with CN2558777's invention "wind-drum type wave power generation equipment" and CN1263209's invention "four-rod type wave generator", that is, the change of air pressure in the vent pipe caused by waves drives the transmission device, and then the transmission device Drive ordinary generators to generate electricity. The disadvantage of this method is that the transmission mechanism is used, which reduces the efficiency of wave power generation and increases the cost.

Contents of the invention

Technical problem: The utility model aims at the deficiencies and defects of the existing technology, and provides a permanent magnet linear wave generator, which uses the pressure change of the air chamber to directly drive the mover of the linear generator, omitting the transmission mechanism that plays an intermediate role, and improves efficiency.

Technical solution: The permanent magnet linear synchronous motor for ocean wave power generation of the utility model is based on the offshore ocean wave power station, and uses the pressure change brought by the impact of ocean waves to directly drive the permanent magnet of the linear generator mover to and fro, cutting the stator winding of the linear motor The induced electromotive force is generated, and then the frequency conversion device is used to convert the frequency of the linear generator into a power frequency, and then the electricity can be transmitted to the user or the power grid. The permanent magnet linear synchronous motor used for ocean wave power generation of the present invention includes a motor primary pole and a motor secondary pole. The permanent magnet linear synchronous motor primary pole includes a primary pole iron core and a primary pole three-phase winding. The primary pole three-phase winding is embedded in the primary pole. In the wire slot of the iron core; the secondary pole of the motor includes a secondary pole permanent magnet, which is installed on the buoy through a spring; the bottom of the container where the linear generator is located is fixed on the seabed; the primary pole and secondary pole of the motor of the linear generator are both Rectangular structure, the secondary permanent magnet is located between the two primary cores, and an air gap is set between the secondary permanent magnet and the two primary cores.

The secondary permanent magnets are composed of a plurality of rare earth permanent magnets NdFeB, and the magnetization direction of adjacent secondary permanent magnets is opposite, so that the magnetic field is distributed sinusoidally along the space; the primary iron core is made of silicon steel sheet Made; the primary three-phase winding is a double stator winding; the air gap refers to an air gap of about 1 cm existing between the primary pole core and the secondary permanent magnet.

When the secondary pole winding of the linear motor is not moving, there is a static magnetic field generated by the permanent magnet in the air gap of the linear motor, and there is no current passing through the stator winding. When the waves come, the pressure of the wave peak and trough is different, causing the permanent magnet The pressure is different, causing the magnetic pole to move, and the stator winding of the linear motor will generate an induced voltage. When the external circuit is closed, the linear motor will transmit electric energy to the external circuit.

When the sea wave is too big, the spring reacts to relieve part of the pressure and protect the linear generator device.

Beneficial effects: the utility model has the following beneficial effects:

1) Replace the traditional rotary generator with a linear motor, without contact drive, reduce dielectric loss and improve power generation efficiency;

2) It can withstand the pressure of sea waves and is not easy to be damaged;

3) No toxic gas, no additional noise, environmentally friendly and healthy;

4) The cost is as low as that of conventional power generation.

5) Since the waves are affected by the movement of the sun, their amplitude and frequency are unstable, so the quality of wave power generation is poor. The stator of the linear generator adopts distributed slot windings to eliminate harmonics and improve power quality.

Description of drawings

Fig. 1 is a sectional view of a permanent magnet linear synchronous motor of the present invention, wherein there are: a permanent magnet 1, an initial pole iron core 2, an initial pole three-phase winding 3, an air gap 4, a spring 5, and a buoy 6.

FIG. 2 is an electrical schematic diagram of the AC frequency converter 7 .

Detailed ways

The permanent magnet linear synchronous motor used for ocean wave power generation of the present utility model comprises a motor primary pole and a motor secondary pole. 3 is embedded in the wire groove of the primary pole core 2; the secondary pole of the motor includes a secondary pole permanent magnet 1, which is installed on the buoy 6 through a spring 5; the linear generator device is fixed in a container, and the linear generator device is located The bottom of the container is fixed on the seabed; the primary pole and the secondary pole of the motor of the linear generator are rectangular structures, the secondary permanent magnet 1 is located between the two primary pole cores 2, and the secondary permanent magnet 1 and the two primary pole cores An air gap 4 is provided between the 2. The secondary permanent magnet 1 is composed of a plurality of rare earth permanent magnets NdFeB, and the magnetization directions of adjacent secondary permanent magnets 1 are opposite, so that the magnetic field is distributed sinusoidally along the space.

The primary pole core 2 is made of ordinary silicon steel sheet magnetically permeable material; the manufacturing process is the same as that of ordinary linear motors.

The secondary pole permanent magnet 1 is a permanent magnet made of rare earth permanent magnet NdFeB, and the magnetization directions between adjacent secondary permanent magnets are opposite, forming an N and S structure;

The primary three-phase winding 3 is a double stator winding;

The air gap specifically refers to an air gap of about 1 cm existing in the primary pole core 2 and the secondary pole permanent magnet 1;

The spring acts elastically and moves with the movement of the sea waves. When the sea waves are large, the spring can be used to relieve the pressure on the linear motor mover and protect the generator equipment.

The buoy acts as buoyancy and is used to support the mover of the linear generator.

The AC-AC frequency conversion device (as shown in Figure 2) first converts AC power to DC, and then uses an inverter to convert DC to the required frequency to supply power to the outside.

Claims (5)

1. A permanent magnet linear ocean wave generator, comprising a motor primary pole and a motor secondary pole, is characterized in that the permanent magnet linear synchronous motor primary pole comprises a primary pole iron core (2), a primary pole three-phase winding (3), and a primary pole The three-phase winding (3) is embedded in the slot of the primary pole iron core (2); the secondary pole of the motor includes a secondary pole permanent magnet (1), and the secondary pole permanent magnet (1) is installed on the buoy (6) through a spring (5); The bottom of the container where the linear generator device is located is fixed on the seabed; the primary pole and the secondary pole of the motor of the linear generator are rectangular structures, and the secondary permanent magnet (1) is located between the two primary pole cores (2). An air gap (4) is provided between the permanent magnet (1) and the two primary pole iron cores (2). 2. The permanent magnet linear ocean wave generator according to claim 1, characterized in that the secondary permanent magnets (1) are composed of a plurality of rare earth permanent magnets NdFeB, and the adjacent secondary permanent magnets (1) The direction of magnetization is opposite, so that the magnetic field is distributed sinusoidally along the space. 3. The permanent magnet linear synchronous motor for ocean wave power generation according to claim 1, characterized in that said primary iron core (2) is made of silicon rigid sheet. 4. The permanent magnet linear ocean wave generator according to claim 1, characterized in that said primary three-phase winding (3) is a double stator winding. 5. The permanent magnet linear ocean wave generator according to claim 1, characterized in that said air gap (4) is about 1 between the primary pole core (2) and the secondary permanent magnet (1). cm air gap.

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