WO2024040426A1

WO2024040426A1 - Mute self-generating generator

Info

Publication number: WO2024040426A1
Application number: PCT/CN2022/114146
Authority: WO
Inventors: 张喆; 廖新春; 廖超辉; 张卓
Original assignee: 张喆
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2024-02-29

Abstract

Disclosed is a mute self-generating generator, comprising a rotor excitation magnet and a stator power generation armature. The rotor excitation magnet comprises a three-layer structure in which the layers are attached to one another, the three layers respectively being a rotor main body layer, consisting of a non-magnetic conductive material, a rotor magnetic conductive layer, consisting of a magnetic conductive material, and a rotor excitation layer, consisting of multiple permanent magnets alternatingly arranged in a circumferential direction according to N and S poles, polarities of the permanent magnets being arranged in a radial direction. The stator power generation armature has multiple cylindrical induction magnetic poles extending in the direction toward the rotor excitation magnet, and generator winding having a three-phase, two-partition fractional slot concentrated winding circuit structure is wound on the cylindrical induction magnetic poles. The present invention improves the power and efficiency of the mute self-generating electric generator while ensuring low noise.

Description

A silent self-generating generator

Technical field

The present invention relates to generators used in the field of sports and fitness equipment, and more specifically to a silent self-generating generator.

Background technique

With the rapid development of the sports and fitness industry, the quality requirements for electromagnetic dampers involved in fitness equipment are becoming higher and higher. Using the principle of self-generation as an electromagnetic damper is the most scientific method. It not only obtains damping force, but also obtains electric energy for the fitness equipment itself to use, eliminating the trouble of external power supply, allowing the fitness equipment to be used in places without power supply. . However, the technical problem encountered in the process of self-generated power is that the self-generated generator will always produce large or small vibrations and noise when working, which affects the quality of the fitness equipment.

Patent 2018211095085 discloses a silent self-generating generator, which in principle eliminates the sources of vibration and noise, allowing the self-generating generator to work in a silent state. However, in recent years, the number of smart fitness projects in the square has been increasing, and the power supply for smart fitness equipment has also been increasing. Although the patent 2018211095085 solves the problem of vibration and noise, its power generation power is small and the efficiency is low, which no longer meets the requirements of the existing smart fitness equipment in the square. power supply needs.

Contents of the invention

Features and advantages of the invention are set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.

The purpose of the invention is to provide a silent self-generating generator with high power and high efficiency to solve the problem of difficulty in power supply for existing square smart fitness equipment.

The technical solution adopted by the present invention to solve the above technical problems is as follows: a silent self-generating generator, including a rotor exciter and a stator generating armature. The rotor exciter includes a three-layer structure that is mutually bonded, namely, a rotor body. The stator layer is made of non-magnetic permeable material, the rotor magnetic permeable layer is made of magnetic permeable material, the rotor excitation layer is composed of several permanent magnets arranged alternately in the circumferential direction according to N and S poles, and the polarity of the permanent magnets is radially arranged; the stator The power generation armature extends toward the direction of the rotor exciter with several cylindrical induction magnetic poles. The power generation windings are wound around the cylindrical induction magnetic poles. The power generation windings have a three-phase, two-partition fractional slot concentrated winding circuit structure.

The rotor exciter and stator power generation armature adopt an outer rotor and inner stator structure. The stator power generation armature has an inner ring, and several cylindrical induction magnetic poles extend outward from the inner ring. The cylindrical induction magnetic poles are wound with Power generation winding.

The rotor exciter includes a three-layer structure in the direction toward the stator power generation armature. The outer layer is the rotor body layer, the middle layer is the rotor magnetic conductive layer, and the inner layer is the rotor excitation layer.

The middle layer of the rotor is a magnetic conductive ring with a thickness of 3-4 mm.

The opposite side surfaces of two adjacent permanent magnets are inclined surfaces.

The number of cylindrical induction magnetic poles is 24, and the number of permanent magnets is 22.

The rotor exciter and stator power generation armature adopt an outer stator and inner rotor structure. The stator power generation armature has an outer ring, and several cylindrical induction magnetic poles extend inward from the outer ring. The cylindrical induction magnetic poles are wound with Power generation winding.

The rotor exciter includes a three-layer structure in the direction toward the stator power generation armature. The inner layer is the rotor body layer, the middle layer is the rotor magnetic conductive layer, and the outer layer is the rotor excitation layer.

In the present invention, the structure of the rotor exciter is improved and adopts a three-layer structure. The magnetic conductive layer of the rotor is composed of magnetic conductive materials. The magnetic field of the permanent magnets can directly form a good loop through the magnetic conductive materials, thereby enhancing the power generation effect of the excitation magnetic field. The excitation intensity of the original silent self-generating generator has been greatly improved. At the same time, the stator power generation armature structure is improved. The power generation winding adopts a three-phase two-partition fractional slot concentrated winding circuit structure. Compared with the A-phase, B-phase, and C-phase alternating and symmetrical arrangement of the conventional synchronous generator windings, the generator can produce odd times. Harmonics have good conditions. The odd harmonic components generated by this circuit structure are very small, so small that they can be ignored. Then the vibration and noise of the generator are naturally weak, thus generating electricity through the rotor exciter and stator armature. The structural improvement has improved the power and efficiency of the silent self-generating generator while ensuring low noise.

Description of drawings

The present invention will be described in detail below with reference to the accompanying drawings and examples. The advantages and implementation modes of the present invention will be more apparent. The content shown in the accompanying drawings is only used to explain the present invention and does not constitute any limitation of the present invention. The limitations, in the attached figure:

Figure 1 is a structural diagram of an outer rotor and an inner stator in which the rotor exciter and the stator power generation armature are used in the embodiment of the present invention;

Figure 2 is a structural diagram of the stator power generation armature in the embodiment of the present invention;

Figure 3 is a three-layer structural diagram of the rotor exciter in the embodiment of the present invention;

Figure 4 is a structural diagram of a permanent magnet in an embodiment of the present invention;

Figure 5 is a schematic diagram of the winding method of the stator power generation armature three-phase two-partition fractional slot concentrated winding and A-phase winding in the embodiment of the present invention;

Figure 6 is a diagram showing the instantaneous magnetic pole distribution status of the 24 columnar induction magnetic poles of the stator armature core corresponding to the 22 magnetic poles of the rotor exciter in the embodiment of the present invention;

Figure 7 is a structural diagram of an outer stator and an inner rotor in which the rotor exciter and the stator power generation armature are used in the embodiment of the present invention.

Detailed ways

As shown in Figure 1, the silent self-generating generator 10 proposed in the embodiment of the present invention includes a rotor exciter 11 and a stator generating armature 12. The rotor exciter 11 includes a three-layer structure that is attached to each other, namely, the rotor body. The magnetic layer of the rotor is made of non-magnetic material, the rotor magnetic layer is made of magnetic material, and the rotor excitation layer is composed of several permanent magnets arranged alternately in the circumferential direction according to N and S poles. The polarity of the permanent magnets is arranged in the radial direction. The stator generator armature 12 extends toward the direction of the rotor exciter with several cylindrical induction magnetic poles. A generator winding 124 (refer to Figure 5) is wound around the cylindrical induction magnetic poles. The generator winding has a three-phase, two-partitioned slot concentrated winding circuit structure. In the present invention, the structure of the rotor exciter is improved and adopts a three-layer structure. The magnetic conductive layer of the rotor is composed of magnetic conductive materials. The magnetic field of the permanent magnet can directly form a good loop through the magnetic conductive materials, thereby enhancing the power generation effect of the excitation magnetic field, thus improving the efficiency of the rotor exciter. The excitation intensity of the original silent self-generating generator has been greatly improved. At the same time, the stator power generation armature structure is improved. The power generation winding adopts a three-phase two-partition fractional slot concentrated winding circuit structure. Compared with the A-phase, B-phase, and C-phase alternating and symmetrical arrangement of the conventional synchronous generator windings, the generator can produce odd times. Harmonics have good conditions. The odd harmonic components generated by this circuit structure are very small, so small that they can be ignored. Then the vibration and noise of the generator are naturally weak, thus generating electricity through the rotor exciter and stator armature. The structural improvement has improved the power and efficiency of the silent self-generating generator while ensuring low noise.

As shown in Figure 2, in this embodiment, the stator power generation armature 12 and the rotor exciter 11 adopt the structure of an outer rotor and an inner stator. The stator power generation armature 12 has an inner ring 121, and several columns extend outward from the inner ring 121. The cylindrical induction magnetic pole 122 is wound with a power generation winding.

As shown in Figure 3, in a preferred embodiment, the rotor exciter 11 includes a three-layer structure in the direction toward the stator power generation armature, which is an outer layer 110, a middle layer 112, and an inner layer 111 in order. The outer layer is the rotor body layer. , the middle layer is the rotor magnetic conductive layer, and the inner layer is the rotor excitation layer. The structure of the rotor exciter is improved and adopts a three-layer structure. The outer layer of the rotor is made of non-magnetic conductive material, the middle layer of the rotor is made of magnetically permeable material, and the inner layer of the rotor is made of permanent magnets. The magnetic field of the permanent magnets can be directly conductive through the middle layer. The material forms a good loop and enhances the power generation effect of the excitation magnetic field. Therefore, compared with the original silent self-generated generator, the excitation intensity is greatly improved, and the power generation power and efficiency are improved.

In this embodiment, the thickness of the magnetic ring in the middle layer of the rotor is 3-4 mm, preferably 3.5 mm, which can optimize silence, power and efficiency. Although the magnetic ring adopts technical means to limit the thickness, power and efficiency are also important parameters of the generator. Under the premise of taking into account the three, it is also necessary to appropriately enlarge the thickness of the magnetic ring.

In this embodiment, the thickness of the magnetic permeable ring in the middle layer of the rotor is 3.5MM, which can achieve the optimal state of silence, power and efficiency.

The rotor middle layer 112 in Figure 3 is made of a magnetically conductive material that is limited in thickness to form a ring-shaped magnetically conductive ring. Its thickness and size requirements are very strict in order to achieve better effects of power, efficiency, and silence.

This thickness dimension requirement is also one of the technical means of the present invention, and this requirement will now be described in more detail. It is almost impossible to achieve the best results in terms of silence, power and efficiency of the generator, because there is an inherent contradiction between the three. If you want to have a good silence effect, you will inevitably lose part of the power and efficiency. On the contrary, if you want to have good power and efficiency effects, Well, it will inevitably destroy part of the mute effect. In order to take into account all three, an optimization method must be adopted. This optimization method relies on multiple prototype experiments to collect favorable parameters. The specific method is to first determine the size of the prototype, process it into a prototype, replace the magnetic rings with different thicknesses multiple times for testing, and finally determine the thickness of the magnetic rings. The general rule is that the generator has a large power and a small number of poles, so the thickness of the magnetic rings needs to be thicker. , the power is small, and the thickness of the magnetic ring with multiple poles is required to be thin.

The prototype of this embodiment passed multiple experimental tests, and finally the thickness of the magnetic ring 3.5 mm was selected as the optimal parameter value.

Since the thickness of the magnetic ring is too thin to support the rigidity of the entire rotor, a layer of non-magnetic material must be placed on the outer or inner ring of the magnetic ring as the main structure of the rotor to support the rigidity of the entire rotor. Therefore, the rotor structure of the silent self-generating generator of the present invention is a three-layer structure, which makes it practical.

In this embodiment, the outer layer of the rotor is made of aluminum non-magnetic material, and the outer layer of the rotor is die-cast together with the main body of the rotor exciter and the shaft core hole. The middle layer of the rotor is made of steel magnetic conductive material and processed into a magnetic conductive ring with a thickness of 3-4mm, which is pressed into the aluminum body to form a whole. The inner layer of the rotor uses 22 permanent magnets, which are alternately arranged in N and S magnetic poles along the circumferential direction. The polarity of the permanent magnets is arranged in the radial direction.

As shown in Figure 4, in this embodiment, the side surface of the permanent magnet 1131 (the surface parallel to the central axis of the rotor exciter) is an inclined surface 1133, and the inclination angle is 9 degrees. The inclined surfaces 1133 of two adjacent permanent magnets are There is an included angle a, and the included angle a is 18 degrees. The advantage is that the arc length in the exciter is appropriately shortened, which is beneficial to the utilization of the magnetic field of the permanent magnet.

As shown in Figures 2 and 3, in this embodiment, the power generation winding adopts a three-phase two-partition fractional slot concentrated winding circuit structure. Referring to Figure 2, the number of cylindrical induction magnetic poles 122 is 24, and the number of slots 123 on the stator generator armature is 24. The number of slots is the same as the number of cylindrical induction magnetic poles. Therefore, the number of slots of the generator winding fractional slots is 24 slots. . Referring to Figure 3, there are 22 N and S pole permanent magnets, so the rotor exciter has 22 poles.

As shown in Figure 5, unlike conventional synchronous generator windings where A-phase, B-phase, and C-phase are arranged alternately and symmetrically, the generator has good conditions for generating odd harmonics. Each phase winding of the three-phase two-partition fractional slot concentrated winding circuit structure is concentrated in two partitions. Referring to the two-partition winding method of phase A in Figure 5, the A1, A2, A3, and A4 phase windings are concentrated in one partition. The A5, A6, A7, and A8 phase windings are concentrated in another partition. The odd harmonic components they generate are very small and can be ignored, so the vibration and noise of the generator are naturally weak. The other two phases use the same winding method. Refer to the induction magnetic poles corresponding to B1-B4, B5-B8, C1-C4, and C5-C8 in Figure 5.

As shown in Figure 6, in this embodiment, the rotor exciter has 22 poles and the cylindrical induction pole has 24 poles. At a certain moment, two pairs of magnetic poles with the same phase are generated. Refer to Figure 6, A3 and A7 phases. Facing the S and N poles of the rotor exciter. This is the minimum number of magnetic poles with the same phase relative to three-phase, four-zone or more zones, that is, phase pole synchronization. The fewer the number of magnetic poles with the same phase between the stator generator armature and the rotor exciter, which means the vibration and noise of the generator will be smaller when the generator is working.

As shown in Figure 7, in another embodiment, the rotor exciter and the stator power generation armature adopt an outer stator and inner rotor structure. The stator power generation armature has an outer ring 125, and several cylindrical inductors extend inward from the outer ring 125. Magnetic pole 122, the cylindrical induction magnetic pole 122 is wound with a power generation winding. The rotor exciter includes a three-layer structure in the direction toward the stator power generation armature, which is an inner layer 111, a middle layer 112, and an outer layer 110. The inner layer 111 is the rotor main layer, the middle layer 112 is the rotor magnetic conductive layer, and the outer layer 110 is the rotor excitation layer. The structure of the rotor exciter is improved to adopt a three-layer structure. The middle layer of the rotor is made of magnetically conductive material, and the outer layer of the rotor is the exciter. The magnetic field of the exciter can directly pass through the middle layer of magnetically conductive material to form a good loop, strengthening the excitation magnetic field. The power generation effect has been greatly improved compared to the original silent self-generated generator, thus improving the power generation power and efficiency.

In the field of power generation, it is very difficult to solve the problem of high efficiency, strong power and silence, because conventional power generation technology is difficult to eliminate the generation of odd harmonics. After the generation of odd harmonics, not only the iron loss increases, but the temperature It also increases the amount of vibration and noise, which is very detrimental to the quiet performance requirements of self-generating generators used in the fitness field. In the first aspect of the present invention, the structure of the rotor exciter is improved. The middle layer of the rotor is made of magnetically conductive material and is made to a certain thickness. The magnetic field of the permanent magnet can directly pass through the middle layer of magnetically conductive material to form a good loop and strengthen the excitation magnetic field. The power generation effect is greatly improved compared to the original silent self-generated generator.

However, since the middle layer of the rotor is made of magnetically permeable materials to enhance the power generation effect of the excitation magnetic field, the negative impact is that the vibration and silent performance of the generator are deteriorated, which cannot meet the requirements for silent fitness equipment. New technologies must be found for the silent technical effect. plan. Therefore, the second aspect is to improve the stator power generation armature technology. The power generation winding adopts a three-phase two-partition fractional slot concentrated winding circuit structure, which can greatly improve the vibration and noise effects of the generator. The odd harmonic components generated by this circuit structure It is very small, so small that it can be ignored, and the vibration and noise of the generator will naturally be weak.

The first and second aspects of technical improvements support each other in terms of function and effect. That is, the first aspect of technical improvements solves the problem of small power and low efficiency of the original silent self-generating generator, but it destroys the original The mute self-generating generator has a mute effect. Therefore, the second aspect of technological improvement is adopted at the same time to solve the defect of worsening mute effect after the first aspect of technological improvement. The two mutually support each other to form a complete technical combination.

On the premise that the mute effect reaches the standard, the present invention increases the efficiency by 10%-24%, more than doubles the power, and achieves unexpected technical effects.

We have conducted many experimental tests in this regard and achieved good technical results. Please refer to the parameter comparison table between the original silent self-power generation and the silent self-power generation of the present invention.

According to the comparison table of beneficial effects, the size of the improved silent self-generating generator remains unchanged. At the same speed and load resistance, the electric power emitted is 2.3-2.5 times that of the original silent self-generating generator, and the efficiency is increased by 10%. -24%, the beneficial effect is very significant, which plays a crucial role in powering the outdoor smart fitness device itself.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Those skilled in the art can realize the present invention in various modifications without departing from the scope and essence of the present invention. For example, features shown or described as part of one embodiment can be used on another embodiment, to yield a still further embodiment. The above are only the best and feasible embodiments of the present invention, and do not limit the scope of rights of the present invention. All equivalent changes made by using the description and drawings of the present invention are included in the scope of rights of the present invention.

Claims

A silent self-generating generator includes a rotor exciter and a stator generating armature, and is characterized by:

The rotor exciter includes a three-layer structure that is mutually bonded. The rotor body layer is made of non-magnetic permeable material, the rotor permeable layer is made of magnetic permeable material, and the rotor excitation layer is composed of several permanent magnets arranged in N along the circumferential direction. , S poles are arranged alternately, and the polarity of the permanent magnets is radially arranged;

The stator power generation armature has several cylindrical induction magnetic poles extending toward the direction of the rotor exciter. Power generation windings are wound around the cylindrical induction magnetic poles. The power generation windings have a three-phase, two-partition fractional slot concentrated winding circuit structure.
The silent self-generating generator according to claim 1, characterized in that the rotor exciter and stator power generating armature adopt an outer rotor and inner stator structure, and the stator power generating armature has an inner ring extending outward from the inner ring. There are several cylindrical induction magnetic poles, and a power generation winding is wound around the cylindrical induction magnetic poles.
The silent self-generating generator according to claim 2, characterized in that the rotor exciter includes a three-layer structure in the direction toward the stator power generating armature, the outer layer is the rotor main layer, and the middle layer is the rotor magnetic conductive layer. The inner layer is the rotor excitation layer.
The silent self-generating generator according to claim 3, characterized in that the rotor middle layer is a magnetic permeable ring with a thickness of 3-4 mm.
The silent self-generating generator according to claim 3, characterized in that the opposite side surfaces of two adjacent permanent magnets are inclined surfaces.
The silent self-generating generator according to claim 1, characterized in that the number of cylindrical induction magnetic poles is 24, and the number of permanent magnets is 22.
The silent self-generating generator according to claim 1, characterized in that the rotor exciter and the stator power generating armature adopt an outer stator and inner rotor structure, and the stator power generating armature has an outer ring extending inward from the outer ring. There are several cylindrical induction magnetic poles, and a power generation winding is wound around the cylindrical induction magnetic poles.
The silent self-generating generator according to claim 7, wherein the rotor exciter includes a three-layer structure in the direction toward the stator power generating armature. The inner layer is the rotor body layer, the middle layer is the rotor magnetic conductive layer, and the outer layer is the rotor magnetic conductive layer. The layer is the rotor excitation layer.