CN219654814U - Magnetic suspension breeze wind power generator - Google Patents

Abstract

The utility model relates to a magnetic suspension breeze wind driven generator, which comprises at least one group of power generation components, wherein the power generation components comprise a central column, a multi-section rotor and a multi-section stator part; the multi-section rotor comprises an outer cylinder and multi-section permanent magnet shaft sections, the multi-section permanent magnet shaft sections are fixedly arranged on the inner side surface of the outer cylinder at intervals along the axial direction of the outer cylinder, and an axial interval distance is reserved between two adjacent permanent magnet shaft sections; the multi-section stator component comprises a multi-section stator core and a multi-section stator winding, the multi-section stator winding and the multi-section stator core are arranged in a one-to-one correspondence manner, the multi-section stator components are sequentially arranged along the axial direction of the center column, and an axial interval distance is reserved between every two adjacent sections of stator components; the stator core is a smooth surface on one side far away from the center post, and is a slotless stator core, and the stator winding adopts a patch winding and is attached to the outer surface of the stator core far away from the center post. By adopting the slotless stator core, the problem of positioning moment is eliminated, and the wind power generator can be started and run at low speed under the breeze condition.

Description

Magnetic suspension breeze wind power generator

Technical Field

The utility model belongs to the technical field of generators, and particularly relates to a magnetic suspension breeze wind driven generator.

Background

Distributed energy systems are an advanced model of human today and future energy, and distributed wind generators are the fundamental components in distributed energy systems.

Among them, in order to realize breeze power generation, magnetic levitation generators are increasingly receiving attention. However, the rotor permanent magnet and the stator slot in the magnetic levitation wind driven generator are mutually influenced to generate positioning moment, and the generated positioning moment influences the starting and low-speed running performance of the magnetic levitation wind driven generator.

Disclosure of Invention

The utility model aims to provide a magnetic suspension breeze wind driven generator, which can solve the problem of loss of positioning moment in the magnetic suspension breeze wind driven generator and can generate electricity under the breeze condition.

The utility model provides a magnetic suspension breeze wind driven generator, which comprises at least one group of power generation components, wherein the power generation components comprise:

a center column;

the multi-section rotor comprises an outer cylinder and multi-section permanent magnet shaft sections, the outer cylinder is arranged on the outer side of the central column in a surrounding mode and is arranged at intervals with the central column, the outer cylinder is overlapped with the axis of the central column, the outer side face of the outer cylinder is used for arranging fan blades, the multi-section permanent magnet shaft sections are fixedly arranged on the inner side face of the outer cylinder at intervals along the axial direction of the outer cylinder, an axial interval distance is reserved between every two adjacent permanent magnet shaft sections, and the outer cylinder and the central column are vertically and coaxially nested;

the multi-section stator component comprises a plurality of sections of stator iron cores and a plurality of sections of stator windings, the plurality of sections of stator windings and the plurality of sections of stator iron cores are arranged in a one-to-one correspondence manner, the plurality of sections of stator components are sequentially arranged along the axial direction of the center column, and an axial interval distance is reserved between every two adjacent sections of stator components;

the stator core is a smooth surface and a slotless stator core, the stator core is fixedly arranged on the center post, the stator winding adopts a patch winding, and is attached to the outer surface of the stator core, which is far away from the center post, so as to form a stator winding of the three-phase motor; a radial air gap is provided between the permanent magnet shaft segments and the stator component, the radial air gap being less than or equal to the axial separation distance.

In an exemplary embodiment of the present utility model, each section of the stator component includes a plurality of groups of the stator cores and a plurality of groups of the stator windings, the plurality of groups of the stator cores are respectively attached to the outer surfaces of the stator cores far away from the center post, each group of the stator windings and the plurality of groups of the stator cores are arranged in a one-to-one correspondence manner, and the plurality of groups of the stator cores attached with the stator windings are sequentially arranged along the axial direction on the center post to form a section of the stator component;

the axial length of each section of rotor is equal to that of each section of stator component, the axial spacing distance is equal to an integer multiple of the radial air gap, the integer multiple is more than zero and less than or equal to two, and the axial spacing distance is less than 5-10 times of the axial length.

In an exemplary embodiment of the utility model, each permanent magnet shaft segment comprises: the permanent magnets are circumferentially arranged on the inner wall of the outer cylinder at the same axial position of the outer cylinder to form a section of permanent magnet shaft section, two adjacent sections of permanent magnet shaft sections are circumferentially staggered along the outer cylinder, and are circumferentially staggered by 360 degrees/(PZn), wherein the number of pole pairs of the P motor, the number of slots of the Z motor and the number of n sections.

In an exemplary embodiment of the present utility model, the magnetic levitation breeze wind power generator further includes a plurality of groups of blades, the stator part and the rotor are disposed in the outer cylinder, the plurality of groups of blades are disposed outside the outer cylinder, the plurality of groups of blades are sequentially arranged in the circumferential direction of the outer cylinder, and the extending direction of the blades is parallel to the axial direction of the center column;

further comprises: the energy storage assembly is used for performing at least one of energy conversion, collection, storage and energy output, and the stator windings in the multi-section stator component are electrically connected with the energy storage assembly;

the fan blades are used for bearing the input of external wind power and transmitting the input to the multi-section rotor so that the rotor rotates relative to the stator component, induced current is generated in the stator winding in the magnetic field, and the induced current flows into the energy storage component.

In an exemplary embodiment of the present utility model, the magnetically levitated breeze wind power generator includes two sets of power generation assemblies, the at least two sets of power generation assemblies being sequentially arranged in an axial direction;

the power generation assembly comprises the stator component, the rotor and the fan blades, and the fan blades on at least two groups of power generation assemblies are sequentially staggered along the circumferential direction of the central column.

In an exemplary embodiment of the utility model, the power generation assembly further comprises supports at both axial ends of the center post, the stator part being provided between the two supports.

In an exemplary embodiment of the utility model, the power generation assembly further comprises an angle adjuster for adjusting the blade angle.

In an exemplary embodiment of the present utility model, the magnetically levitated breeze wind power generator further includes a base, and the center post is vertically disposed on the base; the end of the center post, which is close to the base, is provided with a lead hole, and the output end of the stator winding is led out from the lead hole and is communicated with an inverter, and the inverter can provide damping current for the stator winding in strong wind.

In an exemplary embodiment of the present utility model, the permanent magnet shaft segments and the stator windings are at least partially staggered relatively along an axial direction of the central column, and when the plurality of permanent magnet shaft segments and the plurality of stator windings are nested and fixedly arranged through the central column, the permanent magnet shaft segments and the stator windings are offset by a preset distance along the axial direction, the preset distance is greater than zero and less than a preset multiple of the axial distance, and the preset multiple is less than 1.

In an exemplary embodiment of the utility model, the number of slots per pole q=z/(2p×m) +.1/2, where Z is the number of virtual slots, 2P is the number of poles, and m is the number of phases.

The scheme of the utility model has the following beneficial effects:

the scheme of the utility model comprises a magnetic suspension breeze wind driven generator, which comprises a center column, a multi-section rotor and a multi-section stator component; the stator core is characterized in that a plurality of sections of slotless stator cores are adopted in the multi-section stator component, so that the problem that positioning torque is generated by the stator cores and permanent magnet shaft sections in the rotor is solved, the problem that loss is generated by the positioning torque is further solved, and the stable starting and low-speed operation of the magnetic suspension breeze wind power generator under the breeze condition are ensured.

In addition, the sectional design is adopted, so that the magnetic suspension rigidity can be improved; the installation operation of the magnetic suspension breeze wind driven generator can be simplified.

Other features and advantages of the utility model will be apparent from the following detailed description, or may be learned by the practice of the utility model.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 shows a schematic cross-sectional structure of a magnetically levitated breeze wind driven generator provided by an embodiment of the utility model;

FIG. 2 illustrates a schematic view of a partial enlarged structure of the multi-segment rotor and multi-segment stator components of FIG. 1;

fig. 3 shows a schematic structural diagram of a permanent magnet in an outer cylinder according to an embodiment of the present utility model;

fig. 4 shows a schematic structural diagram of orderly staggered arrangement of fan blades along the circumferential direction of a center column according to an embodiment of the present utility model;

fig. 5 shows a schematic structural diagram of a rotor and a stator component according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a power generation assembly; 10. a center column; 20. a rotor; 201. an outer cylinder; 202. a permanent magnet shaft section; 2021. a permanent magnet; 30. a stator component; 301. a stator core; 302. a stator winding; 40. a fan blade; 50. an energy storage assembly; 60. a support; 70. a base.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

In the present disclosure, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that the utility model may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the utility model.

Referring to fig. 1, an embodiment of the present utility model provides a magnetically levitated breeze wind power generator comprising at least one set of power generation assemblies 1.

Illustratively, the scheme of the utility model comprises two groups of power generation assemblies 1 which are sequentially arranged in the vertical direction; a set of power generation assemblies includes a center post 10, a multi-segment rotor 20, and a multi-segment stator assembly 30.

Referring to fig. 1 and 2, the multi-segment rotor 20 includes an outer cylinder 201 and a multi-segment permanent magnet shaft segment 202, wherein the outer cylinder 201 is disposed around the outer side of the central column 10 and is disposed at intervals between the outer cylinder 201 and the central column 10, the outer cylinder 201 and the central column 10 are disposed in a superposed manner, and the outer cylinder 201 and the central column 10 are disposed in a nested manner. In addition, the outer side surface of the outer cylinder 201 is used for arranging the fan blade 40, and the outer cylinder 201 can be a magnetic conductive thin-wall steel pipe, such as a seamless steel pipe, a coiled pipe and the like, so that the magnetic conductive thin-wall steel pipe is designed in a segmented manner and made into an I-shaped magnetic conductive thin-wall steel pipe for facilitating the installation and production of the magnetic levitation breeze wind driven generator and the modularized production. In this way, the fan blades 40 can be conveniently connected into a whole, and the fan blades 40 can be conveniently installed.

The multiple permanent magnet shaft sections 202 are fixed on the inner side surface of the outer cylinder 201 in an axially spaced manner, and an axially spaced distance lambda is provided between the permanent magnet shaft sections 202 of two adjacent sections.

It will be appreciated that references to axial segments in the embodiments of the present utility model refer to axial segments disposed along the center post 10 when the center post 10 is vertically disposed. Thus, for each axially segmented permanent magnet shaft segment 202, a magnetic field may be formed for generating electricity or for rotating the motor, each permanent magnet shaft segment 202 itself being in essence an assembly of a plurality of permanent magnet blocks that may be arranged in the circumferential direction of the center post 10. The axial segments referred to in the present utility model consist in that the arrangement of the axial segments along the central column 10 is considered and does not affect or interfere with the manner in which the axial segments themselves are provided as carriers for the magnetic field, i.e. the fixing of the permanent magnet pieces can be achieved in a conventional manner as single independent permanent magnet axial segments themselves.

It should be noted that the material of the multi-segment permanent magnet shaft segment 202 is neodymium iron boron, ferrite, bonded neodymium iron boron, plastic neodymium iron boron, etc. For example, the material can be plastic neodymium iron boron, and the material is adhered to the inner side surface of the outer barrel 201 after magnetizing, so that the process is very simple and the cost is low.

Further, referring to fig. 2, the multi-segment stator assembly 30 includes a multi-segment stator core 301 and a multi-segment stator winding 302, the multi-segment stator winding 302 and the multi-segment stator core 301 are disposed in one-to-one correspondence, the multi-segment stator assembly 30 is sequentially arranged at intervals along the axial direction of the center post 10, and an axial interval distance λ is also provided between the stator assemblies 30 of two adjacent segments.

The axial distance λ between the two adjacent permanent magnet shaft segments 202 is the same as the axial distance λ between the adjacent stator components 30.

Further, as shown in fig. 2, the side of the stator core 301 away from the center post 10 is a flat and smooth surface, and the stator core 301 has a smooth slotless structure. The slotless stator core 301 is fixedly nested and arranged on the central column 10, the stator winding 302 adopts a patch winding, and is attached to the smooth outer surface of the stator core 301 far away from the central column 10 in an adhesive or welding mode, so as to form the stator winding 302 of the three-phase motor.

It can be appreciated that if the stator core adopts a slotted structure, the stator core and the rotor can form larger magnetic force at the slotting place, and positioning moment can also be formed, so that the problem of excessive loss is generated. Therefore, the problem of positioning moment generated between the stator core 301 and the permanent magnet shaft section 202 is avoided through the slotless stator core 301, so that the problem of loss generated by the positioning moment is solved, and the stable starting and low-speed operation of the magnetic suspension breeze wind power generator under the breeze condition are ensured.

It should be noted that, in order to reduce the eddy current loss of the stator core 301, the material of the stator core 301 is a soft magnetic material such as a silicon steel sheet, a thin iron sheet, ferrite or microcrystalline silicon, and an SMC composite soft magnetic material.

Furthermore, due to the segmented design of the rotor 20 and stator components 30, it is possible to produce wind turbines of different output power or output capacity according to diameter variations and height variations. And because the rotor 20 adopts the sectional design, the output power or the output capacity can be simply changed according to the number of the rotors 20, and the sequential production of the wind driven generator is facilitated.

Further, referring to fig. 2, the permanent magnet shaft segment 202 has a radial air gap δ with the stator component 30, the radial air gap δ being less than or equal to the axial separation distance λ; namely: lambda is larger than or equal to delta, and as the axial spacing distance lambda is very small, for the motor with the same length, the actual effective length of the stator core 301 is not greatly different from the length of the stator core which is not segmented; that is, the adoption of the segment has very little influence on the actual length of the motor stator core 301, thereby ensuring the output power of the motor, and being more beneficial to practicality. Moreover, when the stator winding 302 is attached to the stator core 301, the axial interval between the stator cores 301 at two adjacent ends is covered, and the actual length of the stator winding 302 is unchanged, so that the output power of the motor is hardly or negligibly affected by the adoption of the segmented stator core 301.

Further, each section of stator component 30 includes a plurality of groups of stator cores 301 and a plurality of groups of stator windings 302, the plurality of groups of stator cores 301 are respectively attached to the outer surface of the central column 10, each group of stator windings 302 and the plurality of groups of stator cores 301 are arranged in a one-to-one correspondence manner, the plurality of groups of stator cores 301 are sequentially arranged on the central column 10 in the axial direction to form a section of stator component 30, each group of stator windings 302 is attached to the outer surface of the stator core 301, which is far away from the central column 10, to form a three-phase motor stator winding 302, and the corresponding three-phase motor stator windings 302 of the plurality of sections of stator components 30 are communicated in a serial or parallel manner so as to transmit the generated current to an energy storage device in parallel or serial.

It will be appreciated that the stator winding 302 may also be of unitary design that covers the outer surface of the multi-segment stator core 301.

Optionally, adjacent rotors 20 are equal in axial length to adjacent stator components 30, with an axial separation distance λ equal to a multiple of the radial air gap δ. Alternatively, the λ=δ or λ=2δ, where the multiple of the radial air gap δ and the axial separation distance λ may be an integer multiple, and the integer multiple is greater than zero and less than or equal to two. The axial separation distance λ is less than five to ten times the axial length.

The axial distance λ is, for example, equal to the radial air gap δ or 2 times the radial air gap δ, that is to say, greater than or equal to the radial air gap δ.

The principle of increasing the magnetic levitation rigidity by segmentation is as follows: since the magnetic levitation stiffness is positively correlated with the area size of the radial air gap delta and the change rate of the area size generated after axial deviation, the magnetic levitation stiffness can be simplified as: k=ηαbρd1l1, for an outer rotor 20 motor, where B air gap flux density, D1 stator core 301 outer diameter or rotor 20 inner diameter D2 diameter, radial air gap δ: delta= (D2-D1)/2, the stator or rotor 20 length is equal to l1=l2, and the α magnetic suspension stiffness constant (related to parameters such as magnetic steel shape, tooth space structure, material, etc.), because the stator core 301 in the embodiment of the present utility model adopts a slotless structure, the tooth space structure may not be considered; rate of change of area of radial air gap delta after η axial deviation. Since both the numerator and denominator of the rate of change expression of the area of the radial air gap delta after axial deviation are related to the length L1, when the axial separation distance λ is equal to or slightly greater than the radial air gap delta, and it is satisfied that the axial separation distance λ is much smaller than the L1/n segmented stator or rotor 20 length, the rate of change η of the area of the radial air gap delta after axial deviation is approximately 1. Therefore, when the axial separation distance λ is equal to or slightly greater than the radial air gap δ, the axial magnetic levitation stiffness is almost proportional to the number of segments n. The maximum rigidity of the axial passive magnetic suspension after segmentation is approximately as follows: 0.95nK (Nm/mm), where K (Nm/mm) is the stiffness of single-stage axial passive magnetic levitation, and the effective working range of axial magnetic levitation is reduced, approximately: 0.95 lambda. Thus, the axial magnetic levitation stiffness of the present utility model is proportional to the number of segments of the rotor 20 or stator.

The radial air gap δ is understood to be the distance between the surface of the stator core 301 remote from the center post 10 and the inner surface of the permanent magnet shaft section 202 near the center post 10.

In the present embodiment, the axial lengths of the multi-segment rotor 20 and the multi-segment stator component 30 are the same; when the number of segments of the stator part 30 and the rotor 20 is greater than 4, the axial restoring force generated by the axial passive magnetic levitation rigidity is enough to overcome the weight of the fan blade 40 and the multi-segment rotor 20 of the wind driven generator, and the axial deflection is less than 0.5mm, so that the maximum axial passive magnetic levitation rigidity can be generated. Therefore, the axial passive magnetic suspension is provided, so that the weight of the revolving body is negligible, the friction force between the center post 10 and the bearing is small, and the electric generator is favorable for breeze starting rotation.

Further, referring to fig. 3, each permanent magnet shaft segment 202 includes a plurality of permanent magnets 2021, which are arranged along the axial direction at the same axial position of the outer cylinder 201, and further a permanent magnet shaft segment 202 is formed on the inner wall of the outer cylinder 201, and two adjacent permanent magnet shaft segments 202 are arranged in a staggered manner along the circumferential direction of the outer cylinder 201, and are circumferentially staggered by 360 °/(PZn), wherein P motor pole pairs, the number of slots of the Z motor, and n segments. The positioning torque is smoothed through the equivalent oblique magnetic steel, so that the positioning torque can be effectively reduced by 2-100 times, and the gentle breeze starting of the wind driven generator is facilitated.

It will be appreciated that the greater the number of segments, the greater the magnitude of the detent torque. The positioning moment of the wind driven generator can be smaller than 0.17Nm through the segmentation.

Further, referring to fig. 1 and 4, the magnetically levitated breeze wind generator further includes a plurality of sets of fan blades 40, the plurality of sets of fan blades 40 are mounted on an outer surface of one side of the outer cylinder 201 far away from the center post 10, the plurality of sets of fan blades 40 are sequentially arranged in a circumferential direction of the outer cylinder 201, and an extending direction of the fan blades 40 is parallel to an axial direction of the center post 10. In this way, the extending direction of the fan blade 40 and the axial direction of the center post 10 are parallel to each other, so that the fan blade can rotate along the wind flowing direction better, and the outer barrel 201 is driven to rotate, so that the permanent magnet shaft section 202 inside the outer barrel 201 is driven to rotate relative to the stator core 301, and then the magnetic induction line between the permanent magnet shaft section 202 and the stator core 301 is cut, so that current is generated on the stator winding 302.

In addition, referring to fig. 1, the magnetic levitation breeze wind power generator further includes an energy storage assembly 50, wherein the energy storage assembly 50 is used for at least one of energy conversion, collection, storage and energy output, and the stator windings 302 in the multi-segment stator component 30 are electrically connected with the energy storage assembly 50.

Illustratively, the energy storage assembly 50 may perform one of energy conversion, collection storage, or energy output; the system can also be two working contents of energy conversion and collection storage, energy conversion and energy output or collection storage and energy output; three kinds of work contents of energy conversion, collection, storage and energy output are also possible.

For example, the energy storage assembly 50 can convert the ac power transmitted by the stator winding 302 into dc power, collect and store the ac power transmitted by the stator winding 302, and output the collected ac power or the converted dc power to the corresponding transformer.

It will be appreciated that the fan 40 is configured to carry an external wind power input and transmit the external wind power input to the multi-segment rotor 20, so that the rotor 20 rotates relative to the stator component 30, and the stator winding 302 located in the magnetic field generates an induced current, so that the induced current flows into the energy storage component through the stator winding 302 for storage.

Referring to fig. 1 and 4, for better wind energy acquisition, the magnetically levitated breeze wind power generator includes at least two sets of power generation assemblies 1, at least two sets of power generation assemblies 1 being sequentially arranged in an axial direction of a center column 10; each group of power generation assemblies 1 comprises the stator component 30, a rotor 20 and a fan blade 40, wherein the stator component 30 comprises a multi-section stator core 301 and a stator winding 302, and the rotor 20 comprises an outer barrel 201 and a multi-section permanent magnet shaft section 202; the number of the outer cylinders 201 is the same as that of the power generation assemblies 1, and the blades 40 on two adjacent power generation assemblies 1 are sequentially staggered along the circumferential direction of the central column 10. In this way, the blades 40 are installed along the circumferential direction of the center column 10 in a staggered manner, so that the increase of the number of the blades 40 is more beneficial to breeze starting, and the high-efficiency performance of the blades 40 can be maintained.

The magnetic suspension breeze wind driven generator comprises two groups of power generation assemblies 1, wherein the two groups of power generation assemblies 1 are sequentially arranged in the axial direction and are fixedly connected together through fixing pieces such as flanges, screws and the like; under the action of wind, the two groups of power generation assemblies rotate according to the same rotation direction. Referring to fig. 4, the blades 40 in the first and second groups of power generation assemblies are sequentially arranged according to an arc angle of 120 °, and the blades 40 in the first group of power generation assemblies and the blades 40 in the second group of power generation assemblies are not overlapped, so that they are staggered in the circumferential direction of the center column 10.

The fan blade 40 may be a vertical fan blade 40 and a lift fan blade 40, the appearance of which is Φ -shaped and H-shaped, the cross section of the fan blade is curved, and the fan blade can provide upward lift wind flow when rotating. The fan blade 40 has low starting moment, higher tip speed, more suitable for rotating under breeze, and higher power output for given weight and cost of the wind wheel.

It should be noted that the fan blade 40 may be configured as a single blade, a double blade, a three blade, or a multi-blade structure.

In addition, the fan 40 may be detachably connected to the outer cylinder 201 by screws, rivets, or the like.

In the embodiment of the present utility model, the two axial ends of the center post 10 are further provided with supporting members 60, and the multi-segment stator component 30 is disposed between the two supporting members 60. In this way, the support members 60 at the two ends of the central column 10 can radially restrain the central column 10, and the support members 60 magnetically levitate and axially unload gravity and support the rotor 20 to rotate for power generation. The mechanical friction of the axial magnetic suspension breeze wind power generator is small, so that the axial magnetic suspension breeze wind power generator is more suitable for generating power in breeze; in addition, the mode has the characteristics of no problems of excessive matching of the bearing, no positioning moment and the like caused by the coupling, small operation noise, long operation life of the wind driven generator and the like, and is particularly suitable for breeze starting and breeze power generation.

Moreover, the support members 60 at the axial ends of the central column 10 may employ bearings, the axial assembly position and size of the bearing chamber ensuring an effective working range of approximately 0.95 lambda for axial magnetic levitation.

Further, the power generation assembly 1 further comprises an angle regulator for regulating the angle of the fan blade 40, and the angle regulator can control the wind cutting angle of the fan blade 40, so that the magnetic levitation breeze wind driven generator is suitable for different areas, the efficiency of the wind driven generator is highest, and the applicability of the wind driven generator is improved.

Further, the magnetically levitated breeze wind power generator further comprises a base 70, wherein the center post 10 is vertically arranged on the base 70 and is fixed on the base 70 by screws or rivets for supporting the center post 10, so that the center post 10 is more stable. The end of the center post 10 near the base 70 is provided with a lead hole to draw the output end of the stator winding 302 out of the lead hole to output the generated current. The output end of the stator winding 302 is communicated with an inverter, and the inverter can provide damping current for the stator winding 302 when the fan blade 40 is subjected to strong wind, so that strong reverse torque is generated, and a damping speed limiting function is provided for the fan blade 40; the three-phase ac power output from the stator winding 302 can also be inverted to a desired dc voltage or ac voltage value.

In addition, the permanent magnet shaft segments 202 and the stator windings 302 are at least partially staggered relative to each other along the axial direction of the central column 10, so that the axial magnetic levitation rigidity can be improved.

As shown in fig. 2 and 5, when the plurality of permanent magnet shaft segments 202 and the plurality of stator windings 302 are nested and fixedly arranged through the center post 10, the permanent magnet shaft segments 202 and the stator windings 302 are offset by a preset distance θ along the axial direction, the preset distance θ is greater than zero and smaller than a preset multiple of the axial spacing distance λ between adjacent permanent magnet shaft segments 202, and the preset multiple is smaller than 1, for example, 0 < θ < 0.9λ, 0 < θ < 0.8λ, or 0 < θ < 0.6λ. In this way, even if the weight of the rotor 20 and the fan blade 40 is too heavy, the axial magnetic suspension rigidity can be ensured to be large enough, and the axial deflection can still be controlled within 1.0mm due to the adoption of the structural design.

It is worth mentioning that the number of slots q=z/(2p×m) of each pole of the magnetically levitated breeze wind driven generator is less than or equal to 1/2, wherein Z is the number of virtual slots, 2P is the number of poles, and m is the number of phases.

The number of the grooves in the embodiment of the utility model is as follows:

virtual slot number z=9n, pole number 2p=8n or pole number 2p=10n, winding coefficient 0.945;

the virtual slot number z=15n, the pole number 2p=14n or the pole number 2p=16n, and the winding coefficient is 0.951;

virtual slot number z=21n, pole number 2p=20n or pole number 2p=22n, winding coefficient is 0.953;

the virtual slot number z=27n, the pole number 2p=26n or the pole number 2p=28n, and the winding coefficient is 0.954;

wherein n=2, 3,4,5,6,7,8,9, 10.

According to the utility model, the stator core 301 is designed to be of a slotless structure, so that the problem of positioning moment generated by the stator core 301 and the permanent magnet shaft section 202 is avoided, and further the problem of loss generated by the positioning moment is avoided, and the generator is more beneficial to generating electricity under the breeze condition. In addition, the rigidity of the magnetic suspension breeze wind power generator can be increased through the sectional type rotor 20 and the stator, and the axial deflection can be controlled; and the sectional design is more beneficial to the installation and production of the magnetic suspension breeze wind driven generator, and the process is simple and the cost is low.

In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model, which is therefore intended to be covered by the appended claims and their equivalents.

Claims (10)

1. A magnetically levitated breeze wind power generator comprising at least one set of power generation assemblies, the power generation assemblies comprising:

a center column;

the multi-section rotor comprises an outer cylinder and multi-section permanent magnet shaft sections, the outer cylinder is arranged on the outer side of the central column in a surrounding mode and is arranged at intervals with the central column, the outer cylinder is overlapped with the axis of the central column, the outer side face of the outer cylinder is used for arranging fan blades, the multi-section permanent magnet shaft sections are fixedly arranged on the inner side face of the outer cylinder at intervals along the axial direction of the outer cylinder, an axial interval distance is reserved between every two adjacent permanent magnet shaft sections, and the outer cylinder and the central column are vertically and coaxially nested;

the multi-section stator component comprises a plurality of sections of stator iron cores and a plurality of sections of stator windings, the plurality of sections of stator windings and the plurality of sections of stator iron cores are arranged in a one-to-one correspondence manner, the plurality of sections of stator components are sequentially arranged along the axial direction of the center column, and an axial interval distance is reserved between every two adjacent sections of stator components;

the stator core is a smooth surface and a slotless stator core, the stator core is fixedly arranged on the center post, the stator winding adopts a patch winding, and is attached to the outer surface of the stator core, which is far away from the center post, so as to form a stator winding of the three-phase motor; a radial air gap is provided between the permanent magnet shaft segments and the stator component, the radial air gap being less than or equal to the axial separation distance.

2. The magnetically levitated breeze wind power generator of claim 1, wherein each section of the stator component comprises a plurality of groups of stator iron cores and a plurality of groups of stator windings, the stator windings are adhered to the outer surfaces of the plurality of groups of stator iron cores far away from the center post, each group of stator windings and the plurality of groups of stator iron cores are arranged in a one-to-one correspondence manner, and the stator iron cores adhered with the stator windings are sequentially arranged along the axial direction on the center post to form a section of the stator component;

the axial length of each section of rotor is equal to that of each section of stator component, the axial spacing distance is equal to an integer multiple of the radial air gap, the integer multiple is more than zero and less than or equal to two, and the axial spacing distance is less than 5-10 times of the axial length.

3. The magnetically levitated breeze wind power generator of claim 1, wherein each permanent magnet shaft section comprises: the permanent magnets are circumferentially arranged on the inner wall of the outer cylinder at the same axial position of the outer cylinder to form a section of permanent magnet shaft section, two adjacent sections of permanent magnet shaft sections are circumferentially staggered along the outer cylinder, and are circumferentially staggered by 360 degrees/(PZn), wherein the number of pole pairs of the P motor, the number of slots of the Z motor and the number of n sections.

4. A magnetically levitated breeze wind power generator according to any one of claims 1 to 3, further comprising a plurality of sets of blades, wherein the stator member and the rotor are disposed in the outer cylinder, the plurality of sets of blades are disposed outside the outer cylinder, the plurality of sets of blades are sequentially arranged in the circumferential direction of the outer cylinder, and the extending direction of the blades is parallel to the axial direction of the center post;

further comprises: the energy storage assembly is used for performing at least one of energy conversion, collection, storage and energy output, and the stator windings in the multi-section stator component are electrically connected with the energy storage assembly;

the fan blades are used for bearing the input of external wind power and transmitting the input to the multi-section rotor so that the rotor rotates relative to the stator component, induced current is generated in the stator winding in the magnetic field, and the induced current flows into the energy storage component.

5. The magnetically levitated breeze wind power generator of claim 4, wherein the magnetically levitated breeze wind power generator comprises two sets of power generation assemblies, the two sets of power generation assemblies being sequentially arranged in an axial direction;

the power generation assembly comprises the stator component, the rotor and the fan blades, and the fan blades on the two groups of power generation assemblies are sequentially staggered along the circumferential direction of the central column.

6. The magnetically levitated breeze wind power generator of claim 5, wherein the power generation assembly further comprises support members at both axial ends of the center post, the stator member being disposed between two of the support members.

7. The magnetically levitated breeze wind power generator of claim 5, wherein the power generation assembly further comprises an angle adjuster for adjusting the blade angle.

8. The magnetically levitated breeze wind power generator of claim 7, further comprising a base, the center post being vertically disposed on the base; the end of the center post, which is close to the base, is provided with a lead hole, and the output end of the stator winding is led out from the lead hole and is communicated with an inverter, and the inverter can provide damping current for the stator winding in strong wind.

9. The magnetically levitated breeze wind driven generator of claim 1, wherein the permanent magnet shaft segments and the stator windings are at least partially staggered relatively along the axial direction of the central column, and when a plurality of the permanent magnet shaft segments and the stator windings are fixedly nested through the central column, the permanent magnet shaft segments and the stator windings are offset by a preset distance along the axial direction, the preset distance is greater than zero and less than a preset multiple of the axial distance, and the preset multiple is less than 1.

10. The magnetically levitated breeze wind power generator of claim 9, wherein the number of slots per pole q = Z/(2p x m) per phase is less than or equal to 1/2, where Z is the number of virtual slots, 2P is the number of poles, and m is the number of phases.