Claims:We Claim:
1. An axial flux rotor assembly (4) comprising:
a rotor (2) having plurality of vents (5); and
a flux linking plate (1) coupled with plurality of magnets (3) wherein magnets (3) are periodically arranged in a relation with annulation on flux linking plate (1).

2. The assembly as claimed in claim 1, wherein the vents (5) on the rotor (2) and periodic annulation arrangement on the flux liking plate (1) are enabling air circulation from and towards air gap between the magnet (3) and stator of an electric motor.

3. The assembly as claimed in claim 1, wherein the magnets (3) are periodically arranged in a relation with annulation on flux linking plate (1) enabling optimum flux density (7) across the plate (1).

4. The assembly as claimed in claim 1, wherein the flux linking plate (1) is having front (15) and rear side, wherein front side (15) is coupled with magnets (3) and the rear side is having periodic annulation.

5. The assembly as claimed in claim 1, wherein the flux linking plate (1) is having front (15) and rear side, wherein front side (15) is coupled with magnets and the rear side is having wavy annulation.

6. The assembly as claimed in claim 1, wherein said flux linking plate (1) is governed by the flux density (7) in material and eventually increasing air gap flux density which enable improvement in motor torque per ampere and efficiency.
, Description:AXIAL FLUX ROTOR ASSEMBLY
Field of the Invention
In general, the present invention relates to a vehicle transmission / traction motor and its component assembly. More particularly, the present invention relates to an axial flux motor and rotor assembly for vehicles.
Background of the Invention
There have been traction motors available in the market which are used in vehicles for converting electrical energy into mechanical energy by receiving power from the battery of the vehicle. Traditionally, the components associated with a traction motor are stators, conducting coils within the motor, stator core, magnets, bearings, casings, covering plates and rotor hub, each of them functionally interact among each other to provide required torque to the vehicle. The stator is fixed in position and the rotor moves relative to the stator. In AC or axial motors, the stator is typically the current carrying component of the motor generating a magnetic field to interact with the rotor. The field generated by the stator will propel or rotate the rotor via a magnetic field relative to the stator.
Such operations of rotor assemblies in an electric motor generates heat in the form of current/resistance losses, iron losses, stray losses and mechanical losses in the rotor and stator. It is necessary to cool down the stator and rotor so as to avoid overheating which might result in demagnetization of magnets in the motor or melting or burning of other parts of the motor. Heat dissipation is the limiting factor in motor sizing and power ratings. The motor current is directly related to power output, as well as the heat generated by the motor.
But still, previously it is been observed that due to the structural configuration of the rotor assembly to be used in a motor, problems such as overheating in core coil, flux leakage and reduced torque output capacity are common in the conventional rotor assembly.
Below are a few prior arts relevant to the present invention:
US20030189388A1 discloses a power unit assembly comprises a pair of mirrored axial flux electric motors having a common axis of rotation, each axial flux motor including a rotor disposed on a rotor shaft and at least one stator disposed in operative relationship to said rotor. A common end plate is disposed between each of said pair of axial flux electric motors to provide a common mounting structure, while an output hub is operatively coupled to each rotor shaft of the pair of mirrored axial flux electric motors. Each of the pair of mirrored axial flux electric motors is operatively configured to provide independent speed and torque to each associated output hub.
CN102265483B discloses An axial flux motor assembly (10) comprises a stack of first and second discs (20a, 20b) arranged alternately such that there is a gap allowing rotation between each disc (20a, 20b). The first disc (20a) is mounted on a rotatable shaft (40), while the second disc (20b) is fixed in position. The first and second discs (20a, 20b) each comprise sectors (200) of magnetic material arranged on a face of the disc (20a, 20b), between each of which sectors (200) is a radially-extending conductor (202) of a conductive path (201) for conducting electric current. The sectors (200) of magnetic material on the first and second discs (20a, 20b) are arranged at a constant angular pitch, but the pitch of the sectors of magnetic material on the first disc may or may not be the same as those on the second disc. When electric current flows in the conductors (202), magnetic flux runs perpendicular to the faces of the discs (20a, 20b) in axially-extending flux paths (220), such that, considering the first disc(s) independently of the second disc(s), the magnetic flux in one axially-extending flux path (220) runs in an opposite direction to that in the immediately-adjacent flux paths (220) on each side of it, and is returned by flux return portions (30) of magnetic material provided at each end of the assembly (10). The total flux is the super-position of the flux of the first disc(s) and the second disc(s). The assembly (10) further comprises switching circuitry (50) for reversing the direction of current flowing in the conductive path (201) in one of the first disc (20a) or the second disc (20b) in correspondence to rotation thereof relative to the other of the first disc or the second disc in such a way as to effect continuous rotation of the first disc.
CN104242598B relates to a permanent-magnet speed regulation, braking or loading apparatus with an adjustable coupled flux. The apparatus is characterized in that a driving plate is a permanent-magnet coupling plate and a driven plate or braking plate is a flux switch type permanent-magnet plate; or the flux switch type permanent-magnet plate is used as a driving plate and the permanent-magnet coupling plate is used as driven plate/braking plate. The permanent-magnet coupling plate and the flux switch type permanent-magnet plate are in an air gap and magnetic field coupling structure mode; the installing sequences of the permanent-magnet coupling plate and the flux switch type permanent-magnet plate can be interchanged; and both the permanent-magnet coupling plate and the flux switch type permanent-magnet plate can serve as the driving plate and driven plate respectively and the internal and external nesting positions of the two plates also can be interchanged. The provided apparatus can be applied to technical fields like coupling transmission and load speed regulation, an automatic transmission unit, braking, rotary loading, power cutting off/combination, electromotor energy saving, household appliances, a sealed pump, petrochemical engineering, and wind power generation and the like; and the technical scheme employed by the apparatus can be used for designing and manufacturing a permanent-magnet speed controller, a speed-regulation coupler, an automatic transmission unit, a brake device, a loading/unloading device, a centrifugal load speed regulator or clutch, or a novel energy-saving household appliance.
CN206461488U discloses a force two stator axially magnetic fields of heat dissipation type magnetic flow to switch formula in -wheel motor, two sets of stator module set up in rotor module bilateral symmetry, the rotor module includes rotor support ring and rotor tooth, the rotor tooth is cyclic annular the distribution outside the rotor support ring, rotor support ring internal fixation is equipped with wind vanes, wind vanes is fixed to be set up between axle sleeve and rotor support ring, be equipped with certain contained angle between the center pin of wind plane that vanes locates and axle sleeve, the annular structure is set to at permanent magnet and U -iron core interval, be equipped with logical groove in the middle of the U -iron core, the inslot is being led to to the winding technique, the stator module outside is equipped with the heat dissipation module, side heat radiation fins is fixed to be set up in radiator base side, top heat radiation fins is fixed to be set up at radiator base outside edge, side heat radiation fins and top heat radiation fins all are the ring dress and distribute on the radiator base, side heat radiation fins outside fixed mounting has the liquid cooling dish.
In the above prior arts, there have been various rotors and motors disclosed, but none of them are efficiently minimizing flux leakage, increasing core flux density, light weight, reduced inertia and self-cooling to avoid overheating of the stator coils. There are various other solutions that have been provided according to the existing arts, but all these solutions still have challenges because of their limited applications and inefficient functioning.
It is, therefore, important to work on the alternative solution to develop a way that obviates the complexity and challenges of the prior arts.
Summary of the Invention
It is one of the objectives of the present invention to provide an axial flux rotor assembly having optimum flux linking without saturation of material which has property of high magnetic permeability.
It is another objective of the present invention to provide an axial flux rotor assembly having reduced weight and inertia of assembly.
It is another objective of the present invention to provide an axial flux rotor assembly having increased air gap flux density.
It is another objective of the present invention to provide an axial flux rotor assembly which enables improvement in motor torque per ampere and efficiency.
It is another objective of the present invention to provide an axial flux rotor assembly which provides improved flux density at region having optimum weight of flux linking plate.
It is another objective of the present invention to provide an axial flux rotor assembly which is capable of being efficiently self-cooled.
It is another objective of the present invention to provide an axial flux rotor assembly capable of reducing flux leakage.
In accordance with one embodiment of the present invention, there is provided an axial flux rotor assembly comprising a rotor having plurality of vents, a flux linking plate coupled with plurality of magnets wherein magnets are periodically arranged in a relation with annulation on flux linking plate.

In accordance with another embodiment of the present invention, there is provided an axial flux rotor assembly comprising a rotor having plurality of vents, a flux linking plate coupled with plurality of magnets wherein magnets are periodically arranged in a relation with annulation on flux linking plate, wherein the vents on the rotor and periodic annulation arrangement on the flux liking plate are enabling air circulation from and towards air gap between the magnet and stator of an electric motors.

In accordance with one of the above embodiments of the present invention, wherein the magnets are periodically arranged in a relation with annulation on flux linking plate enabling optimum flux density across the plate.

In accordance with another embodiment of the present invention, there is provided an axial flux rotor assembly comprising a rotor having plurality of vents, a flux linking plate coupled with plurality of magnets wherein magnets are periodically arranged in a relation with annulation on flux linking plate, wherein the flux linking plate is having front and rear side wherein front side is coupled with magnets and the rear side is having periodic annulation, wherein the flux linking plate is having front and rear side wherein front side is coupled with magnets and the rear side is having wavy annulation.
In accordance with one of the above embodiments of the present invention, wherein said flux linking plate is governed by the flux density in material and eventually increasing air gap flux density which enable improvement in motor torque per ampere and efficiency.

Brief Description of the Drawings

To illustrate the solutions according to the embodiments of the present disclosure more clearly, the accompanying drawings needed for describing the embodiments are introduced below briefly. Apparently, the accompanying drawings in the following descriptions merely show some of the embodiments of the present disclosure, and persons skilled in the art may obtain other drawings according to the accompanying drawings without creative efforts:

Figure 1 shows perspective view of the axial rotor assembly showing wavy configuration of the plate.
Figure 2 shows side view of the axial flux rotor illustrating flux linkages between the plates.
Figure 3 shows top view of the axial flux rotor.

Detailed Description of the Invention

Referring to Figure 1 and 3, an axial rotor assembly is demonstrated, having a rotor (2) provided with a plurality of vents (5) enabling air circulation from front side to rear side, thereby providing cooling effect to the rotor assembly. The rotor (2) is further provided with a plurality of depressions (6) for hub mounting. A flux linking plate (1) having a front side coupled with a periodically arranged plurality of magnets (3), and rear side having a functionally related wavy annulation for enabling optimum flux linkage without saturation of materials having high magnetic permeability, thereby causing reduction in weight and inertia of the rotor assembly. The flux linking plate (1) has a plurality of crests (11) and troughs (10) around its back annulation contributing in effective flux linkage with another rotor assembly (12), wherein the cooling vents (5) are located on the inner side of the crests (11) towards the opening (13) for rotor shaft, wherein a triangular depression (14) is alternately disposed with the cooling vents (5) onto the periphery of the rotor (2) for holding the crests (11) on the flux linking plate (1). Magnets (3) are provided on the front annulation (15) of the rotor assembly and are adapted to be joined to magnets (3) of the same configuration but of opposite pole. of

Referring to Figure 2, the magnets (2) are disposed on the front annulation (15) of the flux linking plate (1) with alternate N-S facing magnets so as to allow flux lines (7) linking between the rotor assemblies (4) thus providing improved flux density in portions of flux linking plate with optimum weight so as to create magnetic field intensity (9) at a given plane in air gap between the two rotor assemblies, hence, leaving no scope of flux leakage, hence, providing effective flux linkage (7). The Rotor (2) consists of plurality of cooling vents (5) for air circulation around rotor (2) and magnet (3) so as to provide cooling effect and optimum weight to the rotor assembly (4).
Referring to figure 3, the top view of the rotor assembly (4) is shown. The rotor (2) is provided with holes for air circulation and optimizes the weight of the rotor so as to provide uniform weight distribution in the rotor assembly.

While the invention is amenable to various modifications and alternative forms, some embodiments have been illustrated by way of example in the drawings and are described in detail above. The intention, however, is not to limit the invention by those examples and the invention is intended to cover all modifications, equivalents, and alternatives to the embodiments described in this specification.

The embodiments in the specification are described in a progressive manner and focus of description in each embodiment is the difference from other embodiments. For same or similar parts of each embodiment, reference may be made to each other.

It will be appreciated by those skilled in the art that the above description was in respect of preferred embodiments and that various alterations and modifications are possible within the broad scope of the appended claims without departing from the spirit of the invention with the necessary modifications.

Based on the description of disclosed embodiments, persons skilled in the art can implement or apply the present disclosure. Various modifications of the embodiments are apparent to persons skilled in the art, and general principles defined in the specification can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments in the specification but intends to cover the most extensive scope consistent with the principle and the novel features disclosed in the specification.