A coil swing type generator

Abstract

The invention relates to a coil swing type generator, which comprises a swing rod, an upper cover, upper magnetic poles, coils, lower magnetic poles, magnets, a lower magnetic yoke, an outer magnetic yoke and a swing plate; the upper cover is annular and a plurality of upper magnetic poles are uniformly distributed on the lower part of the upper cover; the lower magnetic poles are uniformly distributed on the magnets; the magnets are fixed on the lower magnetic yoke; the upper magnetic poles and the lower magnetic poles are oppositely arranged; the outer parts of the upper magnetic poles and the lower magnetic poles are respectively sleeved with the coils; the swing plate is arranged between the upper magnetic poles and the lower magnetic poles; the outer magnetic yoke is sleeved outside the upper cover, the swing plate, the magnets and the lower magnetic yoke; the swing rod passes through the upper cover, the swing plate, the magnets and the lower magnetic yoke and is located at the center of the whole generator; when the swing rod swings, the swing plate is driven to swing; when the swing plate is located between the upper magnetic poles and the lower magnetic poles, the air gap magnetic density reaches the maximum; when the swing plate swings, the magnetic resistance change rate is large, so that the magnetic flux is also large, and the optimal induced electromotive force is obtained by using the large magnetic flux change rate.

Description

Technical Field

[0001] This invention relates to the field of pendulum wind turbines and coil swing power generation, and is mainly applied to generator structures that use wind energy, tidal energy, etc. to drive mechanical swing and convert it into electrical energy. Specifically, it is a coil swing generator. Background Technology

[0002] In today's new era of intelligence, the demand for electricity is increasing day by day with the widespread application of electronic products. Therefore, new generators that use natural wind, flowing water, vibration and other natural forces as power sources have broad application prospects.

[0003] The swing direction of a pendulum wind turbine is not directional, so the generator designed for it must also be adapted to this condition. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide a coil swing generator to solve the above problems.

[0005] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0006] A coil-oscillating generator is characterized by comprising an oscillating rod, an upper cover, upper magnetic poles, a coil, a lower magnetic pole, a magnet, a lower magnetic yoke, an outer magnetic yoke, and an oscillating disk. The upper cover is annular with several upper magnetic poles evenly distributed on its lower part, and the lower magnetic poles are evenly distributed on the magnet. The magnet is fixed on the lower magnetic yoke. The upper and lower magnetic poles are arranged opposite each other, and coils are respectively sleeved on their exteriors. The oscillating disk is located between the upper and lower magnetic poles. The outer magnetic yoke is sleeved on the exterior of the upper cover, the oscillating disk, the magnet, and the lower magnetic yoke. The oscillating rod passes through the upper cover, the oscillating disk, the magnet, and the lower magnetic yoke and is located at the center of the entire generator. When the oscillating rod oscillates, it drives the oscillating disk to oscillate. When the oscillating disk is located between the upper and lower magnetic poles, the air gap magnetic flux density reaches its maximum. When the oscillating disk oscillates, the rate of change of magnetic reluctance is large, resulting in a large magnetic flux. The optimal induced electromotive force is obtained by using a large rate of change of magnetic flux.

[0007] The coil oscillating generator is characterized in that: both the upper and lower magnetic poles are square magnetic poles, and the change in air gap area is linear when the oscillating disk moves; both the upper and lower magnetic poles have eight poles.

[0008] The coil-swing generator is characterized in that: the magnet is a neodymium iron boron magnet, which is fixed to the lower yoke by screws made of non-magnetic material.

[0009] The coil swing generator is characterized in that: the end faces of the upper and lower magnetic poles are curved, and when the swing disk swings, they swing along the trajectory of the swing rod without colliding with the surface of the magnetic poles, keeping the upper and lower air gaps unchanged and not causing fluctuations in the air gap magnetic resistance.

[0010] The coil oscillating generator is characterized in that: the air gap between the oscillating disk and the upper and lower magnetic poles is 1 to 1.5 mm; when the oscillating disk is in the equilibrium position, it can be located in the middle of the upper and lower magnetic poles, at which time the magnetic resistance of the air gap is between the maximum and minimum.

[0011] The beneficial effects of this invention are: ensuring that the change in air gap area is linear during the movement of the oscillating disc, adapting to the non-directional swing direction of the oscillating fan, improving the structural efficiency of the magnetic circuit, and allowing individual assemblies to be stacked in series to increase the power of the motor. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of magnetic poles and coils.

[0014] Figure 2 This is a side cross-sectional view of the present invention.

[0015] Figure 3 This is a schematic diagram of the oscillating disk.

[0016] Figure 4 This is a schematic diagram of a double-layered magnetic pole.

[0017] Figure 5 This is a schematic diagram of phase-separated rectification. Detailed Implementation

[0018] This invention employs a circular design for the oscillating vibratory guide disk to accommodate the non-directional oscillation direction of the pendulum-type fan. Four sets of electromagnetic coils are designed in the four quadrants of the stator coil cross-section of the motor, tentatively constituting a four-phase winding generator. Figure 1 As shown. Each iron core has a square cross-section, ensuring that the change in air gap area is linear during the movement of the oscillating disk. There are eight symmetrically distributed magnetic poles. The lateral cross-sectional view of the motor is shown below. Figure 2 As shown.

[0019] A coil-swing generator includes a swing arm 1, an upper cover 9, upper magnetic poles 2, coils 3, lower magnetic poles 4, neodymium iron boron magnets 5, lower magnetic yokes 6, outer magnetic yokes 7, and a swing disk 8. The upper cover is annular and has several upper magnetic poles evenly distributed on its lower part. The lower magnetic poles are evenly distributed on the neodymium iron boron magnets. The neodymium iron boron magnets are fixed on the lower magnetic yokes. The upper and lower magnetic poles are arranged opposite each other, and coils are respectively wrapped around their exteriors. The swing disk is located between the upper and lower magnetic poles. The outer magnetic yoke is wrapped around the upper cover, the swing disk, the neodymium iron boron magnets, and the lower magnetic yokes. The swing arm passes through the upper cover, the swing disk, the neodymium iron boron magnets, and the lower magnetic yokes and is located at the center of the entire generator.

[0020] Structural principle:

[0021] The motor's top cover is ring-shaped, with eight square magnetic poles machined onto it. The thickness of the top cover plate must ensure that the magnetic flux density does not enter the saturation region of the ferromagnetic material when a maximum magnetic flux of 10 passes through. The cross-sectional dimensions of all magnetic circuits must meet this condition.

[0022] The outer diameter of the lower magnetic pole ring is the same as that of the upper magnetic pole ring, and there should be a large distance between it and the outer magnetic yoke to avoid short circuits in the magnetic flux. To ensure that this magnetic pole ring is positioned symmetrically to the upper magnetic pole ring, it needs to be fixed to the lower end cover together with the permanent magnet, and the fixing screws must be made of non-magnetic material.

[0023] The end faces of the magnetic poles should be machined into arcs with a certain radius. The principle is that when the oscillating disk swings, it can swing along the trajectory of the pendulum without colliding with the surface of the magnetic pole, and the upper and lower air gaps should remain unchanged, thus preventing fluctuations in the air gap magnetic resistance. In addition, the oscillating disk should also be limited by non-magnetic limiting blocks on the outside to prevent the oscillating disk from being attracted by the magnetic poles.

[0024] According to the principles of electromagnetism, when the magnetic flux (magnetic field strength) in the magnetic circuit changes within a coil surrounding a magnetic pole, an induced electromotive force (EMF) will be generated: u = WS * dB / dt. Therefore, this structural design aims to maximize the change in magnetic flux (magnetic field strength). The air gap between the upper and lower magnetic poles is selected to minimize the air gap magnetic flux density (less than 0.2 Tesla), at which point the oscillating disk is completely positioned between the two magnetic poles. When the oscillating disk is completely positioned between the magnetic poles (when the air gap magnetic reluctance is minimal), the air gap magnetic flux density will reach its maximum (not less than 1 Tesla). Considering that the oscillating disk should not be jammed by the two magnetic poles, the air gap on both sides of the oscillating disk should be approximately 1–1.5 mm. At the equilibrium position, the oscillating disk should be positioned between the upper and lower magnetic poles. At this point, the air gap magnetic reluctance is between its maximum and minimum, allowing for a large rate of change in magnetic reluctance during oscillation. Consequently, the magnetic flux will also change, achieving the optimal induced EMF with a large rate of change.

[0025] The lower magnetic pole ring is connected to the upper surface of the axially magnetized neodymium iron boron permanent magnet ring, and the lower surface of the permanent magnet ring is connected to the lower magnetic pole end cap ring of the motor. The magnetic flux path is shown below. Figure 2 .

[0026] Because a differential magnetic flux change occurs in the coils on each phase pole and the coils at their mirror positions when the oscillating disk swings, the induced electromotive force (EMF) in these two coils will have a 180˚ phase change. Therefore, these two coils should be connected in series in opposite directions. Corresponding phase coils on the upper and lower sets of magnetic poles at the same positions should be connected in series in the forward direction. If the induced EMF in each phase coil differs in magnitude when the oscillating disk swings in a certain direction, but there is no phase relationship, all phase windings can be connected in series in the forward direction to form a single large winding. This simplifies the electrical relationships.

[0027] As the oscillating disk swings, the magnetic flux in the magnetic poles changes in amplitude. The induced electromotive force in the coil is alternating, and a DC voltage can be obtained through full-wave rectification. This DC voltage is then converted into a constant-frequency AC voltage by an inverter.

[0028] Structural optimization:

[0029] like Figure 3 As shown, the oscillating disk is processed into a structure with radial ribs to reduce the inertial mass of the oscillation, making the volume of the oscillating disk smaller and the resulting moment of inertia also smaller.

[0030] Because the oscillation frequency of the pendulum-type fan is not high, the magnetic core uses a solid ferromagnetic material with high internal resistance. For example, high-silicon raw materials used in rolling silicon steel sheets, besides having a good magnetization curve, exhibit good isotropic properties after annealing and are easy to process. Finite element method (FEM) magnetic field calculation software is used to perform multi-parameter calculations after the structural dimensions are determined. The experimental setup is designed based on the dimensions of readily available neodymium iron boron (NdFeB) products to ensure the optimal air gap magnetic flux density is achieved.

[0031] The above design is a complete assembly, but individual assemblies can also be stacked in series to increase the motor's power. Because the swing amplitude of the oscillating discs in each layer is different, the radius of the air gap surface of the magnetic poles in each stacked assembly will also be different.

[0032] like Figure 4 As shown: To improve the structural efficiency of the magnetic circuit, a permanent magnet ring can be used, forming a double-pole structure. For example... Figure 5 As shown: If the four-phase windings are not connected in series, phase-by-phase rectification can also be performed.

Claims

1. A coil-oscillating electric generator characterized by: It includes a swing lever, an upper cover, upper magnetic poles, a coil, lower magnetic poles, a magnet, a lower yoke, an outer yoke and a swing plate; the upper cover is annular and has a plurality of upper magnetic poles evenly distributed on the lower part, the lower magnetic poles are evenly distributed on the magnet, the magnet is fixed on the lower yoke, the upper magnetic poles and the lower magnetic poles are oppositely arranged, the outer parts of them are respectively sleeved with the coil, the swing plate is arranged between the upper magnetic poles and the lower magnetic poles, the outer yoke is sleeved outside the upper cover, the swing plate, the magnet and the lower yoke, the swing lever passes through the upper cover, the swing plate, the magnet and the lower yoke and is located at the center of the whole motor, when the swing lever swings, it drives the swing plate to swing, when the swing plate is between the upper magnetic poles and the lower magnetic poles, the air gap magnetic density reaches the maximum, when the swing plate swings, the magnetic resistance change rate is large, so that the magnetic flux is also large, in order to obtain the best induced electromotive force with the large magnetic flux change rate; the upper magnetic poles and the lower magnetic poles are both square magnetic poles, when the swing plate moves, the change of the air gap area is linear, the end faces of the upper magnetic poles and the lower magnetic poles have a curvature, when the swing plate swings, it swings along the trajectory of the swing lever movement and does not collide with the magnetic pole surface, the upper and lower air gaps remain unchanged, which will not cause the fluctuation of the air gap reluctance.

2. The coil-oscillating electric generator according to claim 1, characterized by: The upper magnetic poles and the lower magnetic poles are both eight.

3. The coil-oscillating electric generator according to claim 1, characterized by: The magnet is a neodymium iron boron magnet, which is fixed on the lower yoke through a screw of non-magnetic material.

4. The coil-oscillating electric generator according to claim 1, characterized by: The air gap between the swing plate and the upper magnetic poles and the lower magnetic poles is 1-1.5mm; when the swing plate is in the balance position, it can be located in the middle of the upper and lower magnetic poles, at this time, the magnetic resistance of the air gap is between the maximum and the minimum.

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