Electric and electromechanical machines

Abstract

An electric machine for mounted operation on a support post, wherein the machine comprises a stator assembly and a rotor assembly that are coaxial, wherein the machine has an inner periphery that defines an inner aperture which extends through the machine, wherein the rotor assembly is to rotate about an axis of rotation which is inside the inner aperture and surrounded by the inner periphery, and wherein the machine's inner periphery is a rotatable anchoring support that is configured attachable sidewise to surround the support post.

Description

[0001] Electric and Electromechanical Machines

[0002] Field

[0003]

[0001] The present disclosure relates to electric machines and electromechanical machines. More particularly, the disclosure relates to electromechanical machines commonly known as wind turbines and electric machines thereof.

[0004] Background

[0005]

[0002] Electric machines are used for a vast range of purposes, for example, conversion of energy like motors and generators. An electromechanical machine comprises an electric machine and a mechanical assembly. The mechanical assembly may be a wind blade assembly configured for physical interaction with air for example, for air moving or for electrical power generation by wind.

[0006]

[0003] Electric machines configured for air-machine interactions and, more particularly, for electrical power generation are commonly known as wind turbines.

[0007]

[0004] Vertical axis wind turbines (VAWTs) are omnidirectional, making them useful for capturing wind from any direction. However, conventional VAWTs are often very bulky and require customized construction.

[0008]

[0005] It would be advantageous if VAWTs and / or electric machines of VAWTs without requiring customised support structure can be provided.

[0009] Summary of Disclosure

[0010]

[0006] An electro-mechanical (E&M) machine for retrofitting onto a support structure is disclosed.

[0011]

[0007] The E&M machine may comprise an electric machine and a mechanical assembly. The mechanical assembly may be configured as an interface for air-machine interaction and are axially displaced and coaxially connected to the electric machine.

[0012]

[0008] An electric machine is a device that converts electrical energy into mechanical energy or vice versa, using the principles of electromagnetism. The most common examples are electric motors, which turn electricity into motion, and electric generators, which turn motion into electricity.

[0013]

[0009] The mechanical assembly may comprise a wind-blade assembly that captures wind energy to generate rotational force or is rotated to produce air movement.

[0010] The support structure may be elongate, such as a post, which can be vertical (e.g., a street lamp post, a power line post, an antenna post, etc.) or non-vertical, such as a horizontal post.

[0014]

[0011] The electro-mechanical machine is configured for mounting at an intermediate level on the support structure — that is, between its axial or longitudinal ends.

[0015]

[0012] The machine may be configured as a hollow machine that surrounds an intermediate portion of the support structure when mounted.

[0016]

[0013] The hollow machine may comprise an inner periphery that defines an inner aperture through which the intermediate portion of the support structure extends.

[0017]

[0014] The inner periphery may be axially extending and symmetrical — for example, circularly symmetrical — about a central axis. This axis may also be the central axis of the machine.

[0018]

[0015] The machine may be configured so that when mounted on the support structure, the machine, its inner periphery, and the support structure are coaxial, sharing a common central axis that defines the axial direction.

[0019]

[0016] The retrofit properties of the E&M machine means that the machines can be installed on existing lamp posts for form arrays of wind turbines on existing support structures.

[0020] A kit for on-site assembly of an electric machine around an existing support structure is disclosed. The machine kit comprises a plurality of prefabricated lateral subassemblies.

[0021] The plurality of prefabricated lateral subassemblies comprises a plurality of rotor subassemblies and plurality of stator subassemblies.

[0022] The rotor subassemblies are to be laterally joined to form a rotor assembly which rotatably anchors on the support structure, and the stator subassemblies are to be laterally joined to form a stator assembly which is fixed mounted on the support structure.

[0023] The stator assembly and the rotor assembly are coaxial and surround the support structure when assembled.

[0024] The plurality of prefabricated lateral subassemblies may comprise a plurality of mounting subassemblies. The mounting subassemblies are to be laterally joined to form a mounting assembly which rotatably anchors on the support structure and which provides anchoring support to the rotor assembly.

[0025] Electric Machine

[0026]

[0017] The electric machine comprises a stator and a rotor which is rotatable relative to the stator about its axis of rotation, which defines the rotor axis.

[0018] The axis of rotation of the rotor is typically an axis of symmetry of the rotor, as well as the central axis of the machine. The central axis of the machine is also referred to as the machine’s main axis or the machine axis.

[0027]

[0019] The stator and rotor may be coaxial and axially displaced, sharing the machine’s axis as their common axis.

[0028]

[0020] The stator and the rotor cooperate to form an electromagnetic assembly comprising an electric assembly and a magnetic assembly which are in electromagnetic proximity.

[0029]

[0021] The electric assembly and the magnetic assembly are relatively rotatable about the machine axis, and the electromagnetic interaction between the electric assembly and the magnetic assembly due to their electromagnetic proximity will generate electrical or mechanical power.

[0030]

[0022] The stator may comprise an inner periphery which defines an inner aperture of the stator, and an outer periphery which surrounds its inner periphery and its inner aperture. When the machine is mounted on a support structure, the stator is fixed relative to the support structure, with both its inner and outer peripheries surrounding the support structure.

[0031]

[0023] The rotor may comprise an inner periphery which defines an inner aperture of the rotor and an outer periphery which surrounds its inner periphery and its inner aperture. When mounted on the support structure, the rotor is rotatable about the support structure, with both its inner and outer peripheries surrounding the support structure.

[0032]

[0024] The stator and the rotor cooperate to define a hollow electric machine having a hollow interior defined by the machine’s inner periphery and its inner aperture, and the machine’s inner periphery is collectively defined by the stator’s inner periphery and the rotor’s inner periphery.

[0033]

[0025] The electric machine’s inner periphery is surrounded by the machine’s outer periphery, and the machine’s outer periphery is collectively defined by the stator’s outer periphery and the rotor’s outer periphery.

[0034]

[0026] The rotor comprises a rotor assembly, which may comprise a single rotor unit or a plurality of rotor units. Similarly, the stator comprises a stator assembly, which may comprise a single stator unit or a plurality of stator units.

[0035]

[0027] The rotor unit, or each of the plurality of rotor units, is rotatable about the machine’s inner aperture, with the machine axis as its axis of rotation.

[0036]

[0028] The rotor units may be parallel to each other and / or orthogonal to the rotor axis.

[0029] The or each stator unit has at least one adjacent rotor unit, and vice-versa. A unit of one type can be positioned intermediate two parallel units of the other type.

[0037]

[0030] The or each stator unit and its adjacent rotor unit are coaxial, axially spaced apart, and in magnetic vicinity.

[0038]

[0031] The or each stator unit and the or each rotor unit may be orthogonal to the machine axis.

[0039]

[0032] Therefore, the stator and rotor units have a complementary and adjacent relationship.

[0040]

[0033] Each one of the rotor units and stator units may be assembled from a plurality of subassemblies. The subassemblies that form a single unit may be axially aligned, so that the subassemblies forming a single unit are on the same axial level with respect to the machine axis.

[0041]

[0034] Both a rotor subassembly and a stator subassembly is classified as a lateral subassembly.

[0042]

[0035] When a plurality of lateral subassemblies is assembled to form a stator or rotor unit, the inner and outer peripheries of the subassemblies collectively form the inner and outer peripheries of the unit. Their lateral surfaces may be in abutment or in close proximity.

[0043] Electromagnetic Assembly

[0044]

[0036] The electric machine comprises an electromagnetic (EM) assembly including a magnetic assembly and an electric assembly which are configured for electromagnetic interaction.

[0045]

[0037] The magnetic assembly may comprise a single magnetic unit or a plurality of magnetic units. Similarly, the electric assembly may comprise a single electric unit or a plurality of electric units.

[0046]

[0038] The magnetic unit, or each of the plurality of magnetic units, may be rotatable about the machine’s inner aperture, with the machine axis as its axis of rotation.

[0047]

[0039] The magnetic and electric units are relatively movable; for example, relative rotatable about the machine axis as the axis of rotation.

[0048]

[0040] The electric unit, or each of the plurality of electric units, may be rotatable about the machine’s inner aperture, with the machine axis as its axis of rotation.

[0049]

[0041] Each electric unit has at least one adjacent magnetic unit, and vice-versa. A unit of one type can be positioned intermediate two parallel units of the other type.

[0050]

[0042] Each magnetic unit and its adjacent electric unit are coaxial, axially spaced apart, and in magnetic vicinity.

[0051]

[0043] Each magnetic unit and each electric unit may be orthogonal to the machine axis.

[0044] Therefore, the magnetic and electric units have a complementary and adjacent relationship.

[0052]

[0045] The magnetic unit is configured to produce a magnetic field that interacts with one or more adjacent electric units. Conversely, each electric unit is configured to interact with the magnetic field of one or more adjacent magnetic unit.

[0053]

[0046] These units are axially displaced and in close electromagnetic proximity. Their interaction is configured to be sufficient to generate the machine's rated mechanical or electrical power.

[0054]

[0047] The power rating of the machine may be in the kW range, for example, at 0.5kW or more, including 0.6, 0.7. 0.8. 0.9. 1 ,0, 1.2, 1.4, 1.6, 1.8, 2kW, 4kW, 5kW, etc.

[0055]

[0048] The EM assembly is hollow, featuring an interior periphery that defines an inner aperture, which is a central aperture.

[0056]

[0049] The inner aperture provides a passageway through which an intermediate portion of the support post is to extend, and so that the EM assembly can rotatably anchor on the support post.

[0057]

[0050] The magnetic unit may comprise a magnetic circuit which is configured to produce a magnetic field having magnetic field lines which are disseminated axially towards an adjacent electric unit, and which are distributed, for example, along a circular track, to surround or partially surround the machine’s inner periphery.

[0058]

[0051] The magnetic circuit may comprise a distributed magnetic component or a plurality of discrete magnetic components which is distributed to surround the inner periphery of the machine.

[0059]

[0052] The magnetic component may comprise a permanent magnet, for example, a permanent magnet slab.

[0060]

[0053] The magnetic component may be arranged so that its magnetic polar surfaces are orthogonal to the machine axis.

[0061]

[0054] The electric unit may comprise an electric circuit. The electric circuit may comprise a distributed inductive component or a plurality of discrete inductive components which is distributed to surround the inner periphery and to interact with the magnetic field of the magnetic unit.

[0062]

[0055] The electric circuit may have a circuit plane or circuit planes which is / are orthogonal to the machine’s axis.

[0056] The circuit plane may be defined by the distributed inductive component or collectively by the plurality of discrete inductive components.

[0063]

[0057] The or each inductive component may comprise an inductive coil having a coil plane, and the coil plane may be orthogonal to the machine’s axis.

[0064]

[0058] The electric circuit may comprise a plurality of inductive coils which is distributed, for example, evenly, to surround the machine’s inner periphery.

[0065]

[0059] Each coil may comprise a plurality of windings forming a stack, for example, an aligned stack with their inner and / or outer peripheries aligned.

[0066]

[0060] The windings may collectively define a plane of the coil.

[0067]

[0061] Each coil of the electric circuit may have a coil plane which is orthogonal to the machine axis, the coil plane being defined by the winding or windings.

[0068]

[0062] The coil planes of the plurality of coils may be axially aligned, that is, at the same axial level with respect to the machine axis.

[0069]

[0063] The winding directions of the plurality of coils may be same or opposite.

[0070]

[0064] Coils having opposite winding directions may be alternately disposed.

[0071]

[0065] Coils having same winding direction are connected together to form a coil group and several coil groups may be connected in series and / or in parallel.

[0072]

[0066] A coil group of a first winding direction may be connected to a first input or output, and a coil group of a second, opposite, winding direction may be connected to a second input or output.

[0073]

[0067] When the EM assembly is configured to operate as an electrical power generator, the magnetic unit or the electric unit are driven into relative rotation and electromagnetic interaction, whereby electric current is induced in the electric unit for output.

[0074]

[0068] Where the magnetic unit is driven into rotation, the axial magnetic field of the magnetic unit is to rotate around the inner periphery and the inner aperture of the machine.

[0075]

[0069] When the EM assembly is configured to operate as a motor, which is a mechanical power generator, electric current is fed into the electric unit and the resulting electromagnetic interaction will cause relative rotation between the magnetic unit and the electric unit to produce mechanical power as intended.

[0076]

[0070] Each one of the electric units and magnetic units may be assembled from a plurality of subassemblies.

[0071] Both an electric subassembly and a magnetic subassembly is classified as a lateral subassembly.

[0077]

[0072] An electric subassembly may comprise a coil subassembly.

[0078]

[0073] When a plurality of lateral subassemblies is assembled to form a magnetic or electric unit, the inner and outer peripheries of the subassemblies collectively form the inner and outer peripheries of the unit. Their lateral surfaces may be in abutment or in close proximity.

[0079]

[0074] A lateral subassembly herein has an inner periphery, an outer periphery, and lateral peripheries interconnecting the inner and outer peripheries.

[0080]

[0075] A lateral subassembly may comprise a housing. The subassembly housing may include the inner periphery, the outer periphery and the lateral peripheries.

[0081]

[0076] The subassembly housing may comprise a radial portion, which extends from the inner periphery to the outer periphery and defines a support surface.

[0082]

[0077] The subassemblies that are assembled to form a single unit may be axially aligned, so that the subassemblies forming a single unit are on the same axial level with respect to the machine axis.

[0083]

[0078] The inner periphery of a lateral subassembly has an angular extent which is less than 360 degrees. The angular extent, measured with respect to the machine axis, is typically between 60 degrees and 300 degrees, and preferably 180±15 degrees.

[0084]

[0079] The angular extent may be 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 260, 280, 300 degrees, or a range or ranges selected by a combination or combinations of the aforesaid values.

[0085]

[0080] The inner periphery of a lateral subassembly may be arcuate, for example, concavely arcuate.

[0086]

[0081] The outer periphery of a lateral subassembly may be arcuate, for example, convexly arcuate.

[0087]

[0082] A lateral subassembly may have a radial extent of 0.2m or more, for example, 0.25m, 0.3m, 0.35m, 0.4m, 0.45m, 0.55m, 0.6m, 0.7m, 0.8m, 0.9m, or more, or a range or ranges selected by a combination or combinations of the aforesaid values.

[0088]

[0083] A lateral subassembly may have a radial extent of 1 ,5m or less, for example, 1 ,5m, 1 ,2m, 1.0m, 0.9m, 0.8m, 0.7m, 0.6m, 0.5m, 0.4m, 0.3m, or less, or a range or ranges selected by a combination or combinations of the aforesaid values. Mechanical assembly

[0089]

[0084] The mechanical assembly may have an inner periphery which defines an inner aperture and an outer periphery which surrounds its inner periphery and its inner aperture. When mounted on the support structure, the mechanical assembly is rotatable about the support structure, with both its inner and outer peripheries surrounding the support structure.

[0090]

[0085] The mechanical assembly and the EM assembly are coaxial and axially displaced, with the machine axis being its axis of rotation of the mechanical assembly.

[0091]

[0086] The mechanical assembly may be hollow, featuring an interior periphery that defines an inner aperture, which is a central aperture.

[0092]

[0087] The inner aperture provides a passageway through which an intermediate portion of the support post is to extend, and so that the mechanical assembly can rotatably anchor on the support post.

[0093]

[0088] The inner periphery is axially extending and coaxial with the machine axis.

[0094]

[0089] The mechanical assembly may comprise a wind-blade assembly which is configured to interact with wind blowing towards the support structure or to move air away from the support structure.

[0095]

[0090] The wind-blade assembly may be coaxially connected to the rotor.

[0096]

[0091] The wind-blade assembly may be mounted at an intermediate level which is between the upper and lower ends of the support structure.

[0097]

[0092] The wind-blade assembly may be configured to rotate about the support structure.

[0098]

[0093] The wind-blade assembly may be configured to rotate about the support structure as its axis of rotation.

[0099]

[0094] The wind-blade assembly comprises a wind blade or a plurality of wind blades which surround the support structure.

[0100]

[0095] The wind-blade assembly comprises a plurality of wind-blade subassemblies each of which is a lateral subassembly.

[0101]

[0096] Each wind-blade subassembly comprises a plurality of wind blades which may be mounted on a pair of mounting subassemblies. The wind-blade subassemblies are axially aligned and joined laterally to form a wind-blade assembly.

[0102] Mounting Assembly

[0103]

[0097] The machine may comprise a plurality of mounting assemblies to enable rotatable anchoring of the machine on a support structure, such as a post.

[0098] A mounting assembly of the machine may comprise an attachment portion and a loading portion.

[0104]

[0099] The loading portion provides support to a rotatable component of the machine and the attachment portion provides rotational anchoring support to the loading portion so that the load, which is the rotatable component, is rotatable about the support on which the loading portion anchors.

[0105]

[0100] The loading portion may extend outwardly, i.e., transversely outwards, from the attachment portion to form a mounting platform, for example, a radially extending platform, on which a load can be mounted.

[0106]

[0101] The mounting assembly may be hollow, featuring an interior periphery that defines an inner aperture, which is a central aperture.

[0107]

[0102] The attachment portion may be hollow and has an interior periphery defining an interion aperture which make the attachment portion hollow. The loading portion extends radially away from the attachment portion and is therefore also hollow.

[0108]

[0103] A mounting assembly may be assembled from a plurality of lateral subassemblies. Each lateral subassembly may comprise a split attachment portion and a split loading portion so that when the lateral subassemblies are axially aligned and laterally joined, the split attachment portions are combined to form the attachment portion and the split loading portions are combined to form the loading portion.

[0109]

[0104] A split attachment portion has an inner periphery and the inner peripheries of the split attachment portions are laterally joined to form the inner periphery of the attachment portion.

[0110]

[0105] The inner aperture provides a passageway through which an intermediate portion of the support post is to extend, and a clamping interface so that the mounting assembly can rotatably anchor on the support post.

[0111]

[0106] A mounting assembly may be shared by the rotor and the mechanical assembly. Likewise, a mounting assembly may be shared by the rotor and the stator.

[0112] Description of Figure

[0113]

[0107] The present disclosure is described by way of examples and with reference to the accompanying figures, in which:

[0114]

[0108] Figures 1A and 1 B are perspective views from above and below showing an example electromechanical machine 100 mounted on a support post 10,

[0115]

[0109] Figures 2A and 2B show the machine 100 split in two lateral halves (sub-assemblies),

[0110] Figures 2C and 2D are partially exploded views showing the split machine of Figure 2B with the stator subassemblies axially displaced from the rotor,

[0116]

[0111] Figures 3A and 3B are perspective views from opposite sides of the mounting assembly 190, with the electric machine 140 mounted on its underside,

[0117]

[0112] Figures 4A and 4B are perspective views showing the electric machine subassemblies mounted on the mounting subassemblies 190,

[0118]

[0113] Figure 5 shows the electric machine and mounting subassemblies on opposite lateral sides of the support post 10,

[0119]

[0114] Figures 6A and 6B are exploded perspective views showing the subassemblies of the electric machine 140 and the mounting assembly 190,

[0120]

[0115] Figures 7A and 7B are perspective views of the electric machine 140 attached to the mounting assembly 190,

[0121]

[0116] Figures 8A and 8B are perspective views of the machine showing the stator detached from the rotor housing,

[0122]

[0117] Figures 9A and 9B are perspective views showing the electric machine and the mounting assembly in two lateral halves (subassemblies),

[0123]

[0118] Figures 10A and 10B are perspective views showing the stator subassemblies detached from the rotor and mounting subassemblies,

[0124]

[0119] Figures 11A to 11C show various perspective views of another example electromechanical machine 200,

[0125]

[0120] Figures 12A to 12C are, respectively, top perspective view, side view and bottom perspective view of an electric machine 240 of the electromechanical machine 200,

[0126]

[0121] Figure 12D is a top perspective view of the electric machine 240 with half of the machine housing removed,

[0127]

[0122] Figures 13A and 13B are, respectively, top perspective view and side view of the electric machine 240 with its rotor housing removed,

[0128]

[0123] Figures 14A and 14B are, respectively, top and bottom perspective views of the stator assembly of the electric machine 240, with housings removed,

[0129]

[0124] Figure 15A is a perspective view of an electric machine 340 comprising two rotor units with half of the housing removed,

[0130]

[0125] Figures 15B and 15C are perspective view and side view of the electric machine 340 of Figure 15A with the housing completely removed. Detailed Description

[0131]

[0126] Referring to Figures 1A and 1B, an example electro-mechanical machine 100 is mounted on a post 10.

[0132]

[0127] The machine 100 comprises a wind-blade assembly 120 and an electric machine 140.

[0133]

[0128] The electric machine 140 comprises a stator 160 and a rotor 180.

[0134]

[0129] The machine 140 has a main axis X-X’ and the rotor 180 is configured to rotate about the main axis X-X’ as its axis of rotation.

[0135]

[0130] The wind-blade assembly 120 is fixedly connected the rotor 180 so that the wind-blade assembly 120 and the rotor 180 are to rotate about the main axis X-X’ as their common axis of rotation and in synchronization.

[0136]

[0131] The wind-blade assembly 120, the stator 160 and the rotor 180 are axially distributed along the main axis X-X’, with the rotor 180 being intermediate the wind-blade assembly 120 and the stator 160.

[0137] Stator 160

[0138]

[0132] Referring to Figures 8A and 8B, the stator 160 has a housing 162 and an electric circuit 164 mounted on the housing 162.

[0139]

[0133] The stator housing 162 comprises an inner periphery 162A, an outer periphery 162B surrounding the inner periphery 162A, and a circumferential portion 162C extending between the inner 162A and outer 162B peripheries.

[0140]

[0134] The inner periphery 162A defines an inner aperture 168 which is the stator’s inner aperture.

[0141]

[0135] The stator 160 has a stator axis which is its central axis. The central axis is also the central axis of the inner periphery 162A.

[0142]

[0136] The inner periphery 162A is circular and the circumferential portion 162C extends radially outwards from the inner periphery 162A to the outer periphery 162B.

[0143]

[0137] The electric circuit 164 comprises a plurality of coils 164i which is mounted on the circumferential portion 162C of the stator housing 162.

[0144]

[0138] Each coil 164i comprises a plurality of windings. A winding of the coil 164i has a periphery that defines a winding plane, and the windings are stacked with their peripheries aligned to define a multi-winding coil having a coil plane defined by the windings.

[0139] The coils 164i are evenly distributed in a circular track around the inner periphery 162A, with their coil planes axially aligned and orthogonal to the stator axis, which is also the machine’s main axis X-X’.

[0145]

[0140] The plurality of coils 164i collectively defines a stator plane which is orthogonal to the stator’s central axis.

[0146]

[0141] Referring to Figures 6A and 6B, the example stator 160 is a stator assembly comprising a single stator assembled from a plurality of stator subassemblies, which consists of a first stator subassembly 160A and a second stator subassembly 160B.

[0147]

[0142] Each stator subassembly 160A.160B of the stator 160 is an electric subassembly, and the stator 160 is therefore an electric assembly comprising a single electric unit assembled from a first electric subassembly 160A and a second electric subassembly 160B.

[0148]

[0143] Each stator subassembly 160A.160B comprises a housing 1601 and a plurality of inductive components. The subassembly housing 1601 comprises an inner periphery 1601A, an outer periphery 1601 B, lateral peripheries 1601 D1 , 1601 D2 interconnecting the inner 1601A, 1601A and outer peripheries, and a circumferential portion 1601C extending radially from the inner periphery 1601 A to the outer periphery 1601 B. The circumferential portion 1601 D is surrounded by the inner, outer and lateral peripheries and defines a support surface on which the inductive coils are placed.

[0149]

[0144] Each stator subassembly 160A.160B comprises a plurality of coils 164i seating on the circumferential portion 1601C and the coils 164i are distributed along a circular track, with the stator axis being center of the circular track.

[0150]

[0145] The peripheries 1601A, 1601B, 1601 D1 , 1601 D2 and the circumferential portion 1601C cooperate to define a coil compartment inside which the coils are received. More specifically, the peripheries 1601 A, 1601 B, 1601D1 , 1601 D2 are surrounding walls and the circumferential portion 1601C defines a floor on which the coils are seated.

[0151]

[0146] The coils 164i of each subassembly 160A.160B may be connected in series and / or in parallel, and coils 164i of the adjacent subassemblies 160A.160B may be connected in series and / or in parallel for current input or output.

[0152]

[0147] Electrical wires for current input or output may pass through the housing, for example, through the bottom of the housing 1601.

[0153]

[0148] The stator subassemblies 160A.160B are assembled laterally to form the stator 160. When the stator subassemblies 160A.160B are assembled laterally, their inner peripheries 1601 A cooperate to form the stator’s inner periphery, their outer peripheries 1601 B cooperate to form the stator’s inner periphery, their lateral peripheries are in abutment or in adjacency, and their coils are on a single plane which is orthogonal to the stator axis.

[0154]

[0149] The stator subassemblies 160A.160B are mirror symmetrical and has an angular extent of 180 degrees, so that their lateral joining results in a stator unit having a circular inner periphery and a circular outer periphery.

[0155]

[0150] Referring to Figures 8A and 8B, complementary fastening means may be disposed on corresponding ends of the outer peripheries 1601B of the lateral subassembly housings 1601 and the fastening means are fastened to secure the two lateral subassemblies 160A.160B together.

[0156]

[0151] The lateral subassemblies 160A.160B may be hinged together at corresponding lateral ends so that the assembly can open or close about the hinge.

[0157]

[0152] The inner periphery 162A may be configured as a clamping component so that when the lateral subassemblies 160A.160B are assembled by lateral joining, the inner peripheries will cooperate to form a clamp to clamp on the support structure.

[0158]

[0153] The inner periphery, or the subassembly housing, may be formed of an elastic material such as stainless steel, metal alloy or engineering plastics to form a robust clamp.

[0159] Rotor 180

[0160]

[0154] Referring to Figures 8A and 8B, the rotor 180 has a housing 182 and a magnetic circuit 184 mounted on the housing 182.

[0161]

[0155] The rotor housing 182 comprises an inner periphery 182A, an outer periphery 182B surrounding the inner periphery 182A, and a circumferential portion 182C extending between the inner 182A and outer 182B peripheries.

[0162]

[0156] The inner periphery 182A defines an inner aperture 188 which is the rotor’s inner aperture.

[0163]

[0157] The rotor 180 has a rotor axis which is its central axis. The central axis is also the central axis of the inner periphery 182A.

[0164]

[0158] The inner periphery 182A is circular and the circumferential portion 182C extends radially outwards from the inner periphery 182A to the outer periphery 182B.

[0165]

[0159] The magnetic circuit 184 comprises a plurality of magnets 184i which is mounted on the circumferential portion 182C of the rotor housing 182.

[0166]

[0160] Each magnet 184i is a permanent magnet slab having slab surfaces which are oppositefacing major surfaces that are also magnetic polar surfaces.

[0161] The magnets 184i are evenly distributed in a circular track around the inner periphery 182A, with their major surface axially aligned and orthogonal to the rotor axis, which is also the machine’s main axis X-X’.

[0167]

[0162] The plurality of magnets 184i collectively defines a rotor plane which is orthogonal to the rotor’s central axis,

[0168]

[0163] Referring to Figures 6A and 6B, the example rotor 180 is a rotor assembly comprising a single rotor assembled from a plurality of rotor subassemblies, which consists of a first rotor subassembly 180A and a second rotor subassembly 180B.

[0169]

[0164] Each rotor subassembly 180A,180B of the rotor 180 is a magnetic subassembly, and the rotor 180 is therefore a magnetic assembly comprising a single magnetic unit assembled from a first magnetic subassembly 180A and a second magnetic subassembly 180B.

[0170]

[0165] Each rotor subassembly 180A,180B comprises a housing 1801 and a plurality of inductive components. The subassembly housing 1801 comprises an inner periphery 1801A, an outer periphery 1801 B, lateral peripheries 1801D1 , 1801D2 interconnecting the inner 1801A, 1801A and outer peripheries, and a circumferential portion 1801D extending radially from the inner periphery 1801 A to the outer periphery 1801 B. The circumferential portion 1801 D is surrounded by the inner, outer and lateral peripheries and defines a support surface on which the permanent magnets are placed.

[0171]

[0166] Each rotor subassembly 180A,180B comprises a plurality of magnets 184i seating on the circumferential portion 1801C and the magnets 184i are distributed along a circular track, with the rotor axis being center of the circular track.

[0172]

[0167] The peripheries 1801A, 1801B, 1801 D1 , 1801 D2 and the circumferential portion 1801C cooperate to define a magnet compartment inside which the magnets are received. More specifically, the peripheries 1801 A, 1801 B, 1801D1 , 1801 D2 are surrounding walls and the circumferential portion 1801C defines a ceiling on which the magnets are seated.

[0173]

[0168] The rotor subassemblies 180A,180B are assembled laterally to form the rotor 180. When the rotor subassemblies 180A,180B are assembled laterally, their inner peripheries 1801 A cooperate to form the rotor’s inner periphery, their outer peripheries 1801 B cooperate to form the rotor’s inner periphery, their lateral peripheries are in abutment or in adjacency, and their magnets are on a single plane which is orthogonal to the rotor axis.

[0174]

[0169] The rotor subassemblies 180A,180B are mirror symmetrical and has an angular extent of 180 degrees, so that their lateral joining results in a rotor unit having a circular inner periphery and a circular outer periphery.

[0170] The stator housing 162 and the rotor housing 182 are complementary and cooperate to form the electric machine’s housing 142.

[0175]

[0171] The machine’s housing 142 comprises a lower portion which is the stator housing 162 and an upper portion which is the rotor housing 182 that is rotatable relative to the lower portion.

[0176]

[0172] The upper portion and the lower portion cooperate to define a machine compartment inside which the electric and magnetic components are received.

[0177]

[0173] The upper portion also forms a cover to provide weather shielding to the lower, rotor portion.

[0178]

[0174] To promote electromagnetic interaction efficiency, the floor of the stator may be formed on an electromagnetic material so that axial magnetic lines of the permanent magnets are concentrated along the circular track along which the coils are distributed.

[0179] Mounting Assembly 190

[0180]

[0175] The machine 140 comprises a mounting assembly that enables the rotor to rotate on a support post. This assembly consists of an attachment portion and a loading portion.

[0181]

[0176] The attachment portion rotates on the support post, serving as an anchor. The loading portion extends from the attachment portion and supports the rotor and other rotating components. Consequently, the entire rotor assembly can rotate around both the support post and the central axis of the attachment portion.

[0182]

[0177] The assembly is hollow, featuring an interior periphery that defines an inner aperture, which is a central aperture.

[0183]

[0178] Referring to Figures 1A, 1 B, 3A, 3B, 4A, 4B, 7A, 7B, 8A and 8B, the mounting assembly 190 comprises an attachment portion, which includes a collar 192, and a loading portion, which includes a loading member 194. The collar 192 consists of a collar housing 1922 and a roller bearing 1924 housed within it. The collar housing 1922 features an outer housing portion which defines an outer periphery of the collar housing 1922 that surrounds the roller bearing.

[0184]

[0179] The roller bearing incorporates a plurality of rollers. Each roller 1924i has an axis of rotation parallel to the central axis of the attachment portion. The rollers 1924i are arranged in a circular array, forming an inner race that interfaces with the support post. The inner race defines the inner periphery of the attachment portion, with its central axis coaxial with the central axis of the attachment portion.

[0180] The loading member 194 extends radially outwards from the base of the collar 192 and is configured as a mounting platform for coaxial mounting and attachment of the rotor assembly.

[0185]

[0181] The loading member 194 may comprise a metal plate, for example, a stainless-steel plate which is strong and weather-proof.

[0186]

[0182] The mounting assembly comprises a plurality of lateral sub-assemblies, including a first subassembly and a second subassembly.

[0187]

[0183] Referring to Figures 6A, 6B, 9A, 9B, 10A and 10B, the example mounting assembly 190 is assembled from a plurality of sub-assemblies, consisting of a first subassembly 190A and a second subassembly 190B.

[0188]

[0184] A subassembly 190A, 190B of the mounting assembly 190 is a lateral subassembly comprising a partial attachment portion, which includes a lateral collar portion 192A, 192B, and a lateral loading portion, which includes a lateral loading member 194A.194B.

[0189]

[0185] The lateral collar portion 192A, 192B comprises a split collar housing 1922A, 1922B and a split roller bearing 1924A, 1924B housed within it.

[0190]

[0186] Each of the example lateral subassemblies is a semi-assembly so that the mounting assembly 190 is formed when the first and second subassemblies 190A, 190B are axially aligned and laterally joined.

[0191] Wind-blade assembly

[0192]

[0187] The electro-mechanical machine may comprise a wind-blade assembly for rotatable mounting on an intermediate portion of the support post. The assembly captures wind energy and generates a rotational force to drive the rotor.

[0193]

[0188] The wind-blade assembly may be hollow, with an inner periphery that defines an inner aperture through which the intermediate portion of the support post extends.

[0194]

[0189] The assembly may comprise a plurality of wind blades extending between a first and a second axial end and the wind blades distributed to surround the assembly’s inner aperture.

[0195]

[0190] Each wind blade may have a wind-capturing surface that extends outwardly from an inner edge to an outer edge. The blade may form a curve, spiral or helix on extending outwards.

[0196]

[0191] The inner edges of the blades collectively may define the assembly's inner periphery, while the outer edges collectively define its outer periphery.

[0192] The blades may be mounted on a plurality of mounting assemblies, which together provide rotatable anchoring support to the wind-blade assembly when mounted on a support post.

[0197]

[0193] The mounting assemblies may comprises a first mounting support which provides anchoring support to a first axial portion of the wind-blade assembly and a second mounting support which provides anchoring support to a second axial portion of the wind-blade assembly.

[0198]

[0194] One of the mounting assemblies may be shared between the rotor and the wind-blade assembly.

[0199]

[0195] The wind-blade assembly comprises a plurality of lateral sub-assemblies, including a first subassembly and a second subassembly.

[0200]

[0196] Referring to Figures 1A and 1 B, the wind-blade assembly 120 comprises an example plurality of four wind blades 1202 which is circumferentially distributed to form a circular array of wind blades.

[0201]

[0197] Each wind blade 1202 has an inner edge, an outer edge, an upper edge and a lower edge which cooperate to define a wind capturing surface.

[0202]

[0198] The wind blades 1202 are mounted on a first mounting assembly 1204A and a second mounting assembly 1204B, with the wind blades’ lower edges mounted on the first mounting assembly 1204A and their upper edges mounted on the second mounting assembly 1204B.

[0203]

[0199] Each of the wind-blade assembly’s mounting assemblies 1204A, 1204B has the same description as that of the mounting assembly 190. In fact, the mounting assembly 190, also numerated as 1204A is shared by both the rotor and the wind-blade assembly.

[0204]

[0200] The wind blades 1202 are evenly distributed to form a circular array, with their inner edges collectively defining the assembly’s inner periphery, and their outer edges collectively defining the assembly’s outer periphery.

[0205]

[0201] Each wind blade curves on extending outwardly from the inner edge to the outer edge, and all the blades curve in the same manner.

[0206]

[0202] The wind blades are mounted on so that one axial end is on the first mounting assembly 1204A and another axial end is on the second mounting assembly 1204B.

[0207]

[0203] The wind-blade assembly comprises a plurality of lateral subassemblies, each of which is a wind-blade subassembly,

[0208]

[0204] Referring to Figures 2A and 2B, the wind-blade assembly 120 comprises a first lateral subassembly 120A and a second lateral subassembly 120B.

[0205] The first lateral subassembly 120A comprises an example plurality of two wind blades 1202, with having their lower ends mounted on a first mounting subassembly 1204A1 and their upper ends mounted on a second mounting subassembly 1204B1.

[0209]

[0206] The second lateral subassembly 120B comprises an example plurality of two wind blades 1202, with having their lower ends mounted on a first mounting subassembly 1204A2 and their upper ends mounted on a second mounting subassembly 1204B2.

[0210]

[0207] To assembly the wind blade assembly, the first lateral subassembly 120A and the second lateral subassembly 120B are brought into the vicinity of the support post, so that the two lateral subassemblies 120A, 120B are on two lateral sides of the support post and with their respective inner peripheries axially aligned and facing each other.

[0211]

[0208] The lateral subassemblies 120A, 120B are then fastened together and the wind-blade assembly is formed and mounted on the support post at the same time.

[0212]

[0209] The fastening of the lateral subassemblies 120A, 120B may be by releasable or non- releasable means without loss of generality.

[0213]

[0210] When the lateral subassemblies 120A, 120B are fastened on the support post, the attachment portions of the mounting assemblies 1204A, 1204B collectively form a rotatable clamp to facilitate rotatable anchoring of the assembly on the support post.

[0214]

[0211] The subassemblies 120A, 120B may respectively comprise the rotor subassemblies 180A,180B, as shown in Figures 2C and 2D.

[0215]

[0212] To form the rotor-and-blade subassemblies, the rotor subassembly 180A.180B is attached to an underside of the first mounting subassemblies 1204A1 , 1204A2 while the wind blades are mounted on the upper side.

[0216]

[0213] The wind blades may be considered as a part of the rotor and the rotor-and-blade subassemblies, and hence the rotor-and-blade assembly, may be regarded respectively as the rotor subassemblies and the rotor assembly without loss of generality.

[0217]

[0214] After the rotor-and-blade assembly has been formed, the stator assembly may be formed and attached in the same manner to complete assembling of the machine without loss of generality.

[0218]

[0215] To form the machine 100, the stator subassemblies 160A.160B are brought into the vicinity of the support post and immediately underneath the rotor 180, so that the two lateral subassemblies 160A, 160B are on two lateral sides of the support post and with their respective inner peripheries axially aligned and facing each other.

[0216] The lateral subassemblies 160A, 160B are then fastened together and the stator assembly 160 is formed and mounted on the support post at the same time.

[0219]

[0217] The fastening of the lateral subassemblies 160A, 160B may be by releasable or non- releasable means without loss of generality.

[0220]

[0218] When the lateral subassemblies 160A, 160B are fastened on the support post and immediately underneath the rotor 180, the stator assembly 160 and the rotor assembly 180 cooperate to form the electric machine.

[0221]

[0219] Alternatively, the stator assembly may be simultaneously formed and fastened on the support post first, followed by the simultaneously assembly and mounting of the rotor assembly (with or without the blade assembly) immediately above the stator assembly 160.

[0222]

[0220] An example electromechanical machine 200 of the present disclosure may comprise a wind-blade assembly 220 and an electric machine 240, as shown in Figures 11 A, 11 B and 11C. The electric machine 240 comprises a stator 260 and a rotor 280, as shown in Figures 12A, 12B, 12C and 12D. The machine 240 is a hollow machine having an inner periphery which defines an inner aperture that is the machine’s central aperture.

[0223]

[0221] The machine 240 has a central axis X’-X’ which is also the central axis of the inner periphery.

[0224]

[0222] The stator 260 and the rotor 280 are coaxial and the rotor 280 is rotatable relative to the stator 260 about an axis of rotation which is a central axis of the machine 240.

[0225]

[0223] The stator 260 is hollow and has an inner periphery which defines an inner aperture which is the stator’s central aperture.

[0226]

[0224] The rotor 280 is hollow and has an inner periphery which defines an inner aperture which is the rotor’s central aperture.

[0227]

[0225] Referring to figures 13A and 13B, the rotor 280 comprises a rotor unit including a magnetic circuit. The magnetic circuit comprises a plurality of magnets, and the magnets 284i are mounted on a magnet carrier 286. The magnets may be permanent magnets such as magnet slabs having a pair of major surfaces which are magnetic polar surfaces. The magnet carrier 286 is a toothed carrier having a plurality of radially protruding tooth portions, and the magnets 284i are mounted to form a circular array, with one of their major surfaces abutting the underside side of the tooth portions. The rotor 280 is assembled from a first magnetic subassembly 280A and a second magnetic subassembly 280B, each of which is a lateral subassembly.

[0226] Referring to Figures 14A and 14B, the stator 260 comprises a stator unit including an electric circuit. The electric circuit comprises a plurality of inductive coils, and the coils 264i are mounted on a coil carrier 266. The coils 264i are arranged into two concentric circular arrays which are axially displaced, with a first coil array mounted on an upper side and a second coil array mounted on the lower side of the coil carrier 266. The coil arrays are angularly displaced so that a coil of one array is intermediate a coil of another array.

[0228]

[0227] The coils 264i of each coil array are evenly distributed around the machine’s inner aperture to form a circular array that is orthogonal to the machine’s axis.

[0229]

[0228] The coil 264i of each coil array form has a coil plane and the coil planes of the array are orthogonal to the machine’s axis.

[0230]

[0229] The magnets 284i are evenly distributed around the machine’s inner aperture to form a circular array that is orthogonal to the machine’s axis.

[0231]

[0230] The magnet 284i has a pair of major surfaces and the major surfaces are magnetic polar surfaces that are orthogonal to the machine’s axis.

[0232]

[0231] The coils 264i and the magnets 284i are distributed in magnetic proximity, so that magnetic field lines of the magnetic circuit are concentrated in the axial direction to impinge on the coils of the electric circuit.

[0233]

[0232] The machine 240 comprises an anchoring assembly which provides anchoring support to the machine 240 so that the machine 240 can anchor on the support post 10 with the rotor 280 rotatable about the anchor.

[0234]

[0233] The anchoring assembly comprises an axially extending collar portion 244 and a base portion 246.

[0235]

[0234] The stator 260 and the rotor 280 are coaxially mounted on the collar portion 244, with the stator intermediate the rotor and the base portion.

[0236]

[0235] The stator 260 is fixedly mounted on the collar portion 244 while the rotor 280 is rotatable mounted on the collar portion 244, for example, by means of a roller bearing (not shown).

[0237]

[0236] The base portion 246 is a hinged clamp which is to clamp on to the support post.

[0238]

[0237] The machine 240 features a housing 242 which encloses both the stator 260 and the rotor 280. The housing 242 includes a base portion and a cover portion which cooperate to form a weather-shielding container. The base portion comprises an outer periphery which surrounds the stator 260 and the rotor 280 and a bottom portion which is intermediate the stator and the mounting clamp 246.

[0239]

[0238] The stator 260 may comprise a stator housing 262 which encloses the stator unit.

[0239] The stator assembly 260 is formed by lateral joining of a first stator subassembly 260A and a second stator subassembly 260B.

[0240]

[0240] The rotor assembly 280 is formed by lateral joining of a first rotor subassembly 280A and a second rotor subassembly 280B. Each rotor subassembly 280A, 280B has an inner periphery and the inner peripheries of the subassemblies 280A, 280B when laterally joined form the rotors inner periphery which defines the rotor’s inner aperture.

[0241]

[0241] The anchoring assembly is formed by lateral joining of a first anchoring subassembly 246A and a second anchoring subassembly 246B.

[0242]

[0242] Each anchoring subassembly comprises a split collar portion and a split base portion, and the anchoring subassembly are hinge joined. The split collar portion and the split base portion may be integrally formed as a lateral subassembly.

[0243]

[0243] Likewise, the machine housing comprises a first housing subassembly 242A and a second housing subassembly 242B.

[0244]

[0244] Referring to Figures 15A to 15C, the example electric machine 340 may comprises a second rotor 280S. The rotor 280 which is a first rotor is positioned on top of the stator 260 while the second rotor 280S is positioned underneath the stator 260.

[0245]

[0245] The second rotor 280S comprises a second rotor unit including a second magnetic circuit. The second magnetic circuit comprises a plurality of second magnets, and the second magnets 284Si are mounted on a second magnet carrier 286S. The second magnets 284Si may have same configuration as the magnets 284i of the first rotor.

[0246]

[0246] While the present disclosure has been described with reference to examples and specific embodiments, the examples and embodiments are not intended to be limiting.

[0247]

[0247] For example, while the example electric machine comprises rotor and stator assemblies which are axially displace, the rotor and stator may be axially aligned, that is having the same axial level with respect to the support structure.

[0248]

[0248] For example, the rotor may surround the stator or the stator may surround the rotor without loss of generality.

[0249]

[0249] For example, the electric stator may have an outer periphery and the magnetic rotor may be rotatably mounted on or to surround the stator’s outer periphery, with radial magnetic flux lines disseminating inwardly towards the stator’s electric circuit.

[0250]

[0250] For example, the electric stator may be mounted to surround the magnetic rotors outer periphery, with radial magnetic flux lines disseminating outwardly towards the stator’s electric circuit.

Claims

Claims1) An electric machine for mounted operation on a support post, wherein the machine comprises a stator assembly and a rotor assembly that are coaxial, wherein the machine has an inner periphery that defines an inner aperture which extends through the machine, wherein the rotor assembly is to rotate about an axis of rotation which is inside the inner aperture and surrounded by the inner periphery, and wherein the machine’s inner periphery is a rotatable anchoring support that is configured attachable sidewise to surround the support post.2) The machine of claim 1 , wherein the machine is assembled from a plurality of lateral subassemblies, and wherein the inner periphery is assembled from a plurality of lateral subassemblies each comprising a split bearing, and the split bearings are joined to define the inner periphery of the machine.3) The machine of claim 1 , further comprising a wind-blade assembly which is coaxially connected to the rotor assembly, wherein the wind-blade assembly has an inner periphery which defines an axial portion of the machine’s inner periphery and an axial portion of the machine’s inner aperture, and wherein the wind-blade assembly is rotatable about the machine’s inner aperture as its axis of rotation.4) The machine of claims 1 or 2, wherein an assembly of the machine is formed by laterally joining of a plurality of lateral subassemblies around the machine’s inner aperture; and wherein a lateral subassembly of the plurality of lateral subassemblies has an inner periphery, an outer peripheral, and lateral peripheries interconnecting the inner and outer peripheries.5) The machine of claim 4, wherein the inner periphery of the lateral subassembly has an angular extent that is smaller than that of the machine’s inner periphery, and wherein an assembly formed by laterally joining of a plurality of lateral subassemblies around the machine’s inner aperture has an angular extent equalto that of the machine’s inner periphery, the angular extent being measured with reference to the machine’s axis of rotation.6) The machine of claim 4, wherein the assembly has an inner periphery which is formed by joining of the inner peripheries of the plurality of lateral subassemblies around the machine’s inner aperture, and wherein the assembly’s inner periphery surrounds the assembly’s inner aperture and forms an axial portion of the machine’s inner periphery.7) The machine of claim 6, wherein the assembly has an outer periphery which is formed by joining of the outer peripheries of the plurality of lateral subassemblies, and wherein the assembly’s outer periphery surrounds its inner periphery and its inner aperture.8) The machine of claim 4, wherein a lateral subassembly of the plurality of lateral subassemblies is one of below: an electric subassembly comprising an inductive electric circuit, a magnetic subassembly comprising a magnetic circuit, an electromagnetic subassembly comprising both electric and magnetic circuits, a wind blade subassembly, or a blank.9) The machine of claim 8, wherein the magnetic circuit of the magnetic subassembly is configured to disseminate magnetic field lines in the axial direction and towards the stator assembly, wherein the magnetic field lines are distributed along a circular track having the axis of rotation as its centre, and the circular track has an angular extent smaller than that of the machine’s inner periphery; and / or wherein the electric circuit of the electric subassembly is configured to interact with magnetic field lines in the axial direction, wherein the electric circuit is distributed along a circular track having the axis of rotation as its centre, and the circular track has an angular extent smaller than that of the machine’s inner periphery.10) The machine of claim 9, wherein the magnetic circuit comprises permanent magnets having their pole surfaces orthogonal to the machine’s axis of rotation; and / or wherein the electric circuit comprises inductive coils having their coil planes orthogonal to the machine’s axis of rotation11) The machine of claim 4, wherein the assembly is one of: the stator assembly, the rotor assembly, or the wind-blade assembly; and wherein the lateral subassembly of the plurality of lateral subassemblies is one of: a rotor subassembly, a stator subassembly, or a wind blade sub-assembly.12) The machine of claim 4, wherein lateral subassemblies which are laterally joined are at same axial level.13) The machine of claim 1 , wherein the machine is an electric power generator known as a wind turbine or a motor comprising a wind-blade assembly, wherein the wind-blade assembly is mounted on the rotor assembly, and wherein the wind-blade assembly comprises a plurality of lateral wind blades which surrounds an axially extending central aperture of the machine, the central aperture provides a passageway for through passage of a support post.14) The machine of claim 13, wherein the wind-blade assembly has a first axial end which is mounted on the rotor assembly and a second axial end which is mounted on the post, and wherein the wind-blade assembly comprises a plurality of lateral sub-assemblies which are laterally joined15) The machine of any preceding claims, wherein the stator assembly and the rotor assembly are coaxial and axially displaced, and / or wherein the rotor assembly and the windblade assembly are coaxial and axially displaced, such that the rotor assembly is intermediate the stator assembly and the wind-blade assembly.16) A method of on-site formation of an electric machine of any preceding claims, comprising: placing, axially aligning, and then joining together a plurality of stator subassemblies on a post so that the plurality of stator subassemblies is attached to and surrounds a support post, andplacing, axially aligning, and then joining together a plurality of rotor subassemblies on the post so that the plurality of rotor subassemblies is rotatably attached to and surrounds the support post; wherein a stator subassembly and a rotor subassembly is a lateral subassembly of the machine.17) The method of claim 16, wherein the method comprises: placing, axially aligning, and then joining together a plurality of coil subassemblies on a post so that the plurality of coil subassemblies is attached to and surrounds the post to form the stator assembly, and placing, axially aligning, and then joining together a plurality of magnetic subassemblies on the post so that the plurality of magnetic subassemblies is rotatably attached to and surrounds the post.18) The method of claim 16, wherein the method comprises: attaching a wind-blade assembly to the rotor assembly.19) The method of claim 18, wherein the method comprises: attaching the wind-blade assembly to the post, so that one axial end of the windblade assembly is on the rotor assembly and another axial end is rotatably mounted on the post.20) The method of claim 16, wherein the method comprises: forming a first lateral subassembly comprising a first wind-blade lateral sub-assembly and a first rotor lateral subassembly, forming a second lateral subassembly comprising a second wind-blade lateral subassembly and a second rotor lateral subassembly, and anchoring the first lateral subassembly and the second lateral subassembly on first and second lateral sides of the support post; and forming a stator assembly in immediate vicinity of the rotor assembly by anchoring a first lateral stator subassembly and the second lateral stator subassembly on first and second lateral sides of the support post in immediate axial vicinity of the rotor assembly.21) A kit for on-site assembly of an electric machine around an existing support structure, comprising a plurality of prefabricated lateral subassemblies,wherein the plurality of prefabricated lateral subassemblies comprises a plurality of rotor subassemblies and plurality of stator subassemblies, wherein the rotor subassemblies are to be laterally joined to form a rotor assembly which rotatably anchors on the support structure, and the stator subassemblies are to be laterally joined to form a stator assembly which is fixed mounted on the support structure, and where the stator assembly and the rotor assembly are coaxial and surround the support structure when assembled.22) The kit of claim 21 , wherein the plurality of prefabricated lateral subassemblies comprises a plurality of mounting subassemblies, and wherein the mounting subassemblies are to be laterally joined to form a mounting assembly which rotatably anchors on the support structure and which provides anchoring support to the rotor assembly.

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