WO2021117054A1

WO2021117054A1 - Electric flying vehicle with outer rotor in wheel motor

Info

Publication number: WO2021117054A1
Application number: PCT/IN2020/050712
Authority: WO
Inventors: Dinesh Babu Srinivasan
Original assignee: Finova Quadcopter Private Limited
Priority date: 2019-12-10
Filing date: 2020-08-14
Publication date: 2021-06-17
Also published as: IN201941051143A

Abstract

Electric flying vehicle with outer rotor in wheel motor is comprises a brushless motor with propeller in centre of the wheel to fly like a quad copter, and outer rotor coupled with tire will be compact and efficient wheel-mounted electrical motor to drive the vehicle on ground. The outer rotor is comprises a stator with armature windings around the propeller and a rotor with permanent magnets that rotates around the stator. The brushless motor with propeller has connected with propeller ring. The propeller ring has connected with two torque motors on both side and fixed inside the stator of the wheel. The vehicle comprises two more torque motors to connect each wheel with vehicle and it changes vehicle mode by rotating the wheel. The vehicle has four mode such as drive, take-off, fly and landing mode. The electric flying vehicle is suitable for an urban air transportation.

Description

TITLE: Electric Flying Vehicle with Outer Rotor in Wheel Motor

[0001] FIELD OF INVENTION

The present invention relates to dual mode vehicle. Specifically, the present invention relates to an electric flying vehicle. More particularly the present invention relates to drive and fly electric vehicle. Particularly the present invention relates to vehicle with outer rotor in wheel motor. More specifically, the present invention relates to permanent magnet outer rotor in wheel motor. The said outer rotor in wheel motor operates as normal wheel on ground and flies as a quadcopter with propeller.

[0002] BACKGROUND OF THE INVENTION

In- wheel motor drives, as one of the main propulsion systems for Electric Vehicles, are very attractive and feasible for practical application, since they have the effective feature of offering the electronic differential action, which utilizes the permanent magnet in outer-rotor topology to directly couple with the tire rims and hence removing the mechanical transmission. Thus, the proposed in-wheel motor drive achieves the merits of small size and weight and eliminates the drawbacks due to the mechanical gear. The in-wheel motor drive provides the high torque output at the low speed state with the advent of high-energy permanent magnets (PMs), some kinds of PM motors have been developed to offer higher power density and operating efficiency, such as PM brushless dc motor. The in-wheel motors play the role of electromechanical transmission. And the power converter can adopt the bidirectional type in such a way that the EV energy can be fed back to the battery tank in downhill or braking situation by the same machine. The controller takes the responsibility of coordinating control of wheels and the energy management. The battery tank offers the energy storage for charging and discharging. The in-wheel motor drive runs in the steady-state mode and it works very smoothly at high speed level and operates in the high efficiency region.

[0003] A quadcopter, also called a quadrotor helicopter or quadrotor, is a multicolorhelicopterthat is lifted and propelled by four rotors. Quadcopters are classified as rotorcraft, as opposed to fixed-wing aircraft, because their lift is generated by a set of rotors (vertically oriented propellers). Quadcopters generally use two pairs of identical fixed pitched propellers; two clockwise (CW) and two counterclockwise (CCW). These use independent variation of the speed of each rotor to achieve control. By changing the speed of each rotor it is possible to specifically generate a desired total thrust; to locate for the center of thrust both laterally and longitudinally; and to create a desired total torque, or turning force.A few manned designs appeared in the 1920s and 1930s. These vehicles were among the first successful heavier-than-air vertical takeoff and landing (VTOL) vehicles. However, early prototypes suffered from poor performance, and latter prototypes required too much pilot workload, due to poor stability augmentation and limited control authority.

[0004] Various outer rotor in wheel motor with propellerand flying vehicle has been devised in art; some of the measures are as follows:

[0005] US20110031803A1 relates to an outer rotor-type motor of the present invention comprisesa stator block, a stator, a main cooling part, an outer rotor andan outer housing. The stator block is formed in the shape of a cylinder with a rear end closed. The stator block is installed ona shaft passing through a central portion of the rear end thereof. The stator is fixedly installed on an outer circumferential Surface of the stator block. The main cooling portion is provided on an inner circumferential surface of the stator block to lower temperature of a corresponding portion. The outer rotor rotatably installed at an outside of the stator and the outer housing has a circumferential portion fixed to a front circumferential portion of the outer rotor.

[0006] WO2010136868A1 relates to an in- wheel motor having an inner stationary portion (the stator), and an outer rotating portion (the rotor) that rotates around the stator and drives a wheel directly attached to the rotor. The stator may comprise an inner support structure around which a plurality of magnets having windings is disposed in a circumferential fashion. The rotor circumferentially surrounds the stator, and includes permanent magnets placed at an interval along a surface of the rotor. An intermediate layer between the rotor and the stator is comprised of a bearing that allows movement of the rotor relative to the stator. By attaching a wheel directly to the outer surface of the rotor, a compact and efficient wheel-mounted electrical motor may be provided.

[0007] US9598171 relates to vehicle with aerial and ground mobility, wherein wheel and rotor are connected (assembled) like a single system. In this prior art one rotor is attached with each wheel (total 4 rotor for 4 wheel). The front two wheels are connected with motor by gear and it will drive the wheel in road like a normal vehicle. The said wheel will turn fully horizontal position to generate the lift when the vehicle is flying, and diameter of the wheel is bigger than rotor and wheels are placed under the rotor. In drove mode only the wheel touches the ground and rotor placed above the wheel.

[0008] CN103213466A relates to a fly wheel system wherein a wheel hub motor is a permanent magnet inner rotor brushless motor, the reduction mechanism is a planetary gear reducer, both mounted on a cylindrical shaped internal infrastructure, the sequence to the first planetary gear wheel motor reducer sequentially mounted in the middle of the infrastructure and outwardly with respect to an end of the vehicle body, and the cylindrical shaped coaxial infrastructure.

[0009] JP2016222216 relates to a four-wheel drive vehicle, with the vehicle mounting and base with several pillars for supporting the vehicle in a space, and a plurality of rotor blades, as well as the respective wheel of each rotating blade and the vehicle, connecting respectively, and a pseudo helicopter comprising in the transmitting mechanism erected spaced apart on the base (air floating (buoyant) vehicle), in a vehicle land and air dual constructed, each transmission mechanism comprises a respective first means said provided to each wheel, through each connector to the respective first section, and the second means being respectively erected, provided on the respective second means transportation of land and air dual said is constituted by a respective rotor blade.

[00010] US6786450 relates to canard roadable aircraft comprises of a fuselage having a bottom providing a first lift surface, removable canard wings secured to the fuselage providing a second lift surface, a convertible main wing secured to the fuselage providing a third lift surface, at least three wheels to support the fuselage, at least one of said wheels being a drive wheel, a propeller connected to an engine within the fuselage, means for rotating the propeller, means for disconnecting said propeller from said engine and means for rotating the drive wheels.

[0011] The present invention provides the electric flying vehicle with outer rotor in wheel motor outer rotor with a combination for drive and flying vehicle.

OBJECTS OF THE INVENTION

[0012] The primary object of the present invention is to provide an electric flying vehicle with outer rotor in wheel motor. [0013] It is one object of the present invention, wherein the said vehicle has driven by outer rotor in wheel motor and flyby brushless motor with propeller combined wheel facility.

[0014] It is yet another object of the present invention, wherein vehicle has four wheels.

[0015] It is another one object of the present invention, wherein the vehicle has four modes: drive, take-off, fly and landing.

[0016] It is another object of the present invention, wherein the said brushless motor with propeller placed in centre of the wheel and connected with propeller ring by spokes.

[0017] It is another object of the present invention, wherein the said the propeller ring has connected with torque motor on both side.

[0018] It is another object of the present invention, wherein the said the torque motors has fixed inside the stator of the wheel.

[0019] It is another object of the present invention, wherein the said in- wheel motor having the stator and the rotor that rotates around the stator.

[0020] It is another object of the present invention, wherein the said permanent magnets placed atan interval along inside surface of the rotor.

[0021] It is another object of the present invention, wherein the said armature windings onsurfaces of the stator are used for torque production in rotor.

[0022] It is another object of the present invention, wherein the saidrotor directly connectswith the tire rim to drive the vehicle.

[0023] It is another object of the present invention, wherein the said stator has covered by a protect cover with controllers on both side of the wheel.

[0024] It is another object of the present invention, wherein the said protect cover is connected with connecting rod.

[0025] It is another object of the present invention, wherein the said connecting rod is connecting the wheel with vehicle body by two torque motors. [0026] It is another object of the present invention, wherein the main vehicle body which includes control, battery and accommodation space.

[0027] It is another object of the present invention, wherein the controller takes the responsibility of coordinating control of four wheels and the energy management.

[0028] It is even another object of the present invention, wherein the accommodation space is either passenger seat or cargo.

[0029] It is object of the present invention, wherein drive mode is manual or automatic.

[0030] It is one another object of the present invention, wherein flying mode is fully automatic.

SUMMARY OF INVENTION:

[0031] The main aspect of the present invention is to provide an electric flying vehicle with outer rotor in wheel motor comprises of: wheels and central main body.

[0032] It is one aspect of the present invention, wherein the said wheel comprises of at least one brushless motor, atleast two propeller blades, at least one torque motor, at least one propeller ring, atleast one stator, at least one armature windings, atleast one rotor, at least one permanent magnet, at least one tire with rim, at least four spokes, at least one protects cover, and at least one connecting rod.

[0033] It is one aspect of the present invention, wherein the said central main body comprises at least two torque motors, at least one connecting rod, control, power supply and accommodation space.

[0034] It is one aspect of the present invention, wherein the said brushless motor is attached with a propeller blade.

[0035] It is one aspect of the present invention, wherein the said the brushless motor with propeller is fixed in centre of the wheel and connected with propeller ring by spokes.

[0036] It is another aspect of the present invention, wherein the said the propeller ring has connected with a torque motor on both side.

[0037] It is one aspect of the present invention, wherein the said the propeller ring circumferentially surrounded by stator. [0038] It is one aspect of the present invention, wherein the said the torque motors are fixed inside the stator.

[0039] It is another aspect of the present invention, wherein the said surface of the stator is covered by armature windings.

[0040] It is one aspect of the present invention, wherein the said rotor circumferentially surrounds the stator.

[0041] It is another aspect of the present invention, wherein the said permanent magnets are placed at an interval circumferentially along the surface of the rotor.

[0042] It is one another aspect of the present invention, wherein the said permanent magnets are made up of materials not limited to rare-earth magnetic materials.

[0043] It is one another aspect of the present invention, wherein there is an air gap between rotor and stator in wheel.

[0044] It is one another aspect of the present invention, wherein the said controller is configured to control speed and torque of the outer rotor by varying a frequency in the said armature windings.

[0045] It is one another aspect of the present invention, wherein the said the rotor outer surface directly connects with tire rim.

[0046] It is one another aspect of the present invention, wherein the said protect cover covers both side of the stator with armature windings and rotor with permanent magnet.

[0047] It is one another aspect of the present invention, wherein the said protect cover is connected with connecting rod.

[0048] It is one another aspect of the present invention, wherein torque motor has connected with wheel by a connecting rod to turn the wheel from drive to fly mode.

[0049] It is yet another aspect of the present invention, wherein the said torque motor has connected with other torque motor by connecting rod to connect the wheel with vehicle body.

[0050] It is even another aspect of the present invention, wherein the said battery pack is fixed in bottom of the vehicle body. [0051] It is one another aspect of the present invention, wherein the said controller of the wheel and vehicle is fixed in the vehicle body.

[0052] It is one another aspect of the present invention, wherein the said vehicle can accommodate people and cargo to transport.

BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 illustrates a perspective view for describing the outer construction of an outer rotor in wheel motor with propeller in drive mode according to the present invention;

[0054] Figure 2 illustrates exploded perspective view of an outer rotor in wheel motor with propeller in drive mode according to the present invention;

[0055] Figure 3 illustrates the perspective view for inner construction of the outer rotor in wheel motor with propeller in drive mode according to the present invention.

[0056] Figure 4 illustrates partial perspective and close view for describing the propeller ring brushless motor with propeller and torque motor in drive mode.

[0057] Figure 5 illustrates the perspective view for the inner construction of the outer rotor in wheel motor with propeller in take-off and landing mode, according to the present invention.

[0058] Figure 6 illustrates the side view of the said vehicle in a driving position, according to the present invention.

[0059] Figure 7 illustrates the side view of the said vehicle in take-off and landing position, according to the present invention.

[0060] Figure 8 illustrates the side view of the said vehicle in flying position, according to the present invention.

PET ATT ED DESCRIPTION OF INVENTION WITH REFERENCE TO ACCOMPANYING DRAWINGS [0061] With reference to figures 1 and 2the present invention relates to a wheel in drive mode. The present invention specifically relates to a wheel with a combination of drive and fly.

[0062] Figures 3 and 4 illustrates the inner construction of the outer rotor in wheel motor with propeller and propeller ring brushless motor with propeller and torque motor in drive mode.

[0063] Figure 5 illustrates the inner construction of the outer rotor in wheel motor with propeller in take-off and landing mode.

[0064] With reference to figures 6, 7 and 8the said vehicle has four modes such as drive mode, fly mode, take off mode and landing mode. The said vehicle has four wheels 1 and they are placed like two wheels in front and two wheels in rear. The said four wheels in the vehicle are mention like front right wheel -1 FRW, front left wheel -1 FLW, rear right wheel -1 RRW, rear left wheel -1 RLW.

[0065] With reference to figure lthe said each wheel 1 has connected with torque motor2 and 3 by connecting rod 4 and 5. The said wheel has protects cover 6, tire with rim 7, rotor 8, permanent magnet 9, stator 10 and armature winding 11. The said wheel further comprises of torque motors 12&13, propeller ring 14, spokes 15, brushless motor 16 and propeller blade 17. The said vehicle’s main body 18 is situated in centre with control, battery power supply and accommodation space, wherein the said accommodation space is either seating for persons or cargo.

[0066] In the present invention, the said wheel 1 has outer rotor8with tire 7for driving like a car in ground and brushless motor 16 with propeller 17for flying like a quadcopter are combined in a single system.

[0067] The main embodiment of the present invention is wheel 1, wherein the said wheel lcomprises following main components, a stationary stator 10 with armature winding 11, a rotor 8 with permanent magnet 9, brushless motor 16 with propeller 17 and a torque motor 12 & 13as shown in figures 2, 3, 4 and 5. The brushless motor 16is attached with a propeller bladel7 such that it is capable to lift the vehicle from ground and fly like a quadcopter. The brushless motor 16 with propeller 17is fixed in centre of the wheell and connected with propeller ring 14 by spokes 15 [0068] One of main embodiment of the present invention is the propeller ring 14has connected with torque motors 12&13 on both sides as shown in figures 4. The torque motors 12&13 are rotating the propeller ring 14 from vertical to horizontal and horizontal to vertical direction on both direction in take-off and landing mode. The torque motors 12&13 are fixed inside the stationary stator 10. The stationary stator 10 is positioned around the circumferentially surrounds the propeller ring 14. So, the brushless motor 16 with propeller 17 are not rotate in drive mode. The rotor 8 is positioned around the circumference of the stator 10. Such that the rotor 8is capable of rotation around the stator 10. A plurality of permanent magnets 9 are positioned along a circumference inner surface of the rotor8. An armature winding 11 are surrounds on teeth of the stator 10. An air gap is formed between the rotor 8 and the stator lOact like a bearing and it’s support the axial rotation of the rotor 8 relative to the stator 10. As discussed, the armature winding 11 of the stator 10 can be energized in a controlled fashion to drive rotation of therotor8 with permanent magnet 9.

[0069] The permanent magnets 9 may be formed of a ferromagnetic material, including iron, cobalt or nickel. Alternatively, or additionally, the permanent magnets 9 could be rare-earth magnets such as samarium cobalt or neodymium-iron-boron. Other appropriate materials could also be used.

[0070] One another embodiment of the present invention is the protect cover 6 could be formed in the shape of a ring, as shown in figures 1 and 2. The protect cover 6is providing circumferential cover over the outside of the stator lOincluded armature winding Hand permanent magnet 9 in the rotor on both side to protect it from any weather condition. The protect cover 6 is a component for supporting the rotation of outer rotor8around the stator 10. So, that rotation of the rotor 8 causes a vehicle to move in a forward or reverse direction. Any additional support structure may be provided between the rotor 8, statorlO and the cover6, such as a solid support or any other structure that can support a large weight load of the wheel and rotation of rotor 8. The outer surface of the protect cover 6has connected with connecting rod 5as shown in figures 1.

[0071] The protect cover 6 and connecting rod 5 may be formed of any rigid material that would provide enough rigidity to support the weight of a wheel. For example, a composite, a solid metal, or a metal alloy material could be used. Alternatively, a rigid plastic material could be used, or a heterogeneous mix of any two or more materials. Other examples are possible as well.

[0072] Although shown in the figures 1, 2, 3 & 5, a tire with rim7 may be attached directly to an outer surface of the rotor 8. The rotor 8 may employ an additional mechanical support to a circumferential rim upon which a tire 7can be mounted. The tire7, for example, may be comprised of a rubber or rubber/composite compound, and may be inflated with air to maintain a pressure. The tire 7may include additional load-supporting sidewalls or plastic load-bearing inserts to allow the time to run safely for a limited range at a limited speed. In this embodiment, the rotor 8 may be formed to include flanges at outside edges of the outer surface that the tire 8mayinterface and bond width to secure the tire and rotor 8together.

[0073] Another main embodiment of the present invention as shown in the figures 1 is the wheel 1 has connected with torque motor 3 by connecting rod 5to rotate the wheel from vertical to horizontal and horizontal to vertical direction on both direction in take-off and landing mode. The said torque motor 3 has connected with torque motor 2 by connecting rod 4 to turn the wheel from left to right and right to left on both direction in drive mode. The said torque motor 2 is fixed in each corner of the vehicle as shown in the figures 6, 7 and 8.

[0074] One of main embodiment of the present invention shown in the figures is the torque motors 2, 3, 12 &13 are a special class of brushless permanent-magnet synchronous motors. The torque motor 2, 3,12 &13 is a rolled-up linear motor. It is the large number of poles that enables conventional torque motors to attain high torque at moderate speeds. Another attractive feature is their compact design which includes a narrow lamination stack and a large hollow shaft or bore.

[0075] As with linear motors, torque motors are a type of “frameless” motor. This means that the motor does not include a housing, bearings, or feedback device. These components can be selected by the machine builder and optimized according to the required performance or purchased as part of an assembly. Torque motors produce high torque at moderate speeds and even when stationary or “stalled”. Contrary to traditional drives, the sizing and selection of a torque motor is purely based on torque, not power. Fundamentally, the peak torque determines the maximum torque that the motor physically produces, and the continuous torque defines the amount of torque the motor can continuously supply. The duty cycle of the application will define the dependency on peak or continuous torque. Since the propeller ring 14and wheel 1 are directly connected to the rotor of thetorque motor 3,12&13without the use of transmission elements, torque motors are classified as direct drives.

[0076] The main application of this vehicle is drone and cargo model for delivering goods and personal vehicle model for public transport purpose.

[0077] The present invention operates in four different modes and the mode of operations are illustrated below which is only construed for better understanding of the invention and not limited to scope of the invention.

Drive Mode:

[0078] With reference to figures 1 & 6, in the drive mode of the present invention only the tire 7 will be rotated by the said outer rotor 8. Outer rotor in-wheel motor 1 comprises the rotor 8 circumferentially surrounding the stator 10. As previously mentioned above, the rotor 8 includes a plurality of periodically placed permanent magnets 9. The stationary stator lOis to support the axial rotation of the rotor 8. An armature winding 11 may be formed around the central finger (not shown) of the stator 10 and connected to a switch (not shown) for supplying power to the winding 11. When armature winding llenergized by applying current, it’s produces electromagnet flux in stator 10 to drive rotation of the permanent magnetic rotor 8 in clockwise or counter-clockwise direction in a controlled fashion. In practice, an optical or mechanical encoder may be used to provide a position indication of the rotor 8 to the control circuit (notshown). The control circuit could use the position indication in determining the proper timing of pulses to provide to the windings 11 to cause a desired clockwise or counter-clockwise movement of the rotor 8. A speed and torque of the rotor 8may be controlled by varying a frequency of the current.

[0079] Other hand the torque motors 12 & 13 will be stationary because it’s fixed in stator 10 in the wheel 1. In the said the torque motors 12 & 13 are keeping the propeller ring 14 in vertical position along with other parts of the wheel like brushless motor 16 with propeller 17 and spokes 15 will remain vertical and stationary position in drive mode.

[0080] In the said mode the wheel lis in vertical position and moving forward or backward direction in the ground. In this manner, an outer rotor 8 can be provided that directly drives the tire, eliminating transmission losses from a centralized engine, decreasing the overall weight of the vehicle, and increasing a range of an electric vehicle incorporating the in-wheel motor. Additionally, during vehicle braking, the in-wheel motor can provide regenerative power to pump energy back to a storage battery fours during a subsequent acceleration, further increasing the range of the electric vehicle incorporating the in-wheel motor. This also increases space efficiency since no separate centralized space is required for the motor. The said mode is either manual or fully automatic in its operation and the automatic is accessed by artificial intelligence.

Take-off Mode:

[0081] With reference to figures 5 & 7, in the take-off mode of the present invention, first the torque motors 12 & 13 turns the propeller ring 14 from vertical to horizontal position. As mention above along with propeller ring 14, the brushless motor 16 and propeller 17will turn from vertical to horizontal position to take off the vehicle. Then propeller 17 will start to rotate by brushless motor 16 for generate lift force. The advantages of a brushless motor 16over brushed motors are high power-to-weight ratio, high speed, electronic control, and low maintenance.

In the present invention the take-off mode is active before changing the vehicle from drive mode to fly mode and it’s fully automatic. The wheel 1 will maintain the take-off position until the vehicle reaches safety altitude limit to change fully flying mode.

Fly Mode:

[0082] With reference to figure 8, in the present invention once the vehicle is lifted to safety altitude limit, the torque motor 3 will rotate entire wheel 1 from vertical to horizontal position by rotating connecting rod 5 to fly. At the same time the brushless motor 16and propeller 17 maintains their horizontal position by torque motors 12 & 13 to generate life force continuously. In the present invention once the vehicle is lifted from the ground the rotor 8 along with tire 7 is stopped to rotate.

[0083] In fly mode of the present invention is fully automatic and it is controlled by software. The said vehicle is facilitated to change the mode from drive to fly mode by pressing a button and the software decides whether the vehicle can take off from that location or not, this based on the input signal from the software the vehicle initiates the take-off mode while driving the vehicle. Landing Mode:

[0084] With reference to figures 5 and 7, in the landing mode of the present invention, first the torque motors 3 will rotate entire wheel 1 from vertical to horizontal position by rotating connecting rod 5. At the same time the brushless motor 16and propeller 17maintains their horizontal position by torque motors 12 & 13 and generate the life force continuously until the wheel 1 touch down the ground smoothly.

[0085] In the present invention once the vehicle is touch down the ground the propeller 17 will stop to rotate by brushless mode 16. Then the torque 12 & 13 turn the propeller ring 14 from horizontal to vertical position. As mention above now the whole wheel 1 along with propeller ring 14, the brushless motor 16 and propeller 17 is in vertical position. Now the vehicle is completely landed in the ground from fly mode and ready to drive again in ground as mention in drive mode. In the present invention the landing mode is active before changing the vehicle from fly mode to drive mode.

Claims

WE CLAIM

1. Outer rotor in wheel motor of electric flying vehicle comprises: a. wheel 1; b. brushless motor 16; c. propeller blades 17; d. propeller ring 14; e two torque motors 2, 3, 12 and 13; f. spokes 15; g. stator 10; h. armature windings 11; i. rotor 8; j. permanent magnets 9; k. connecting rod 5; and l. protecting cover 6; wherein the said the brushless motor 16 is fixed in centre of the wheel 1; wherein the said brushless motor 16 is attached with a propeller blade 17; wherein the brushless motor 16 is connected with propeller ring 14 by spokes 15; wherein the said the propeller ring 14 has connected with torque motors 12 & 13 on both sides; wherein the said the torque motors 12 & 13 are installed inside the stator 10; wherein the said surface of the stator 10 is covered by armature windings 11; wherein the said stator 10 circumferentially surrounds the propeller ring 14 in the wheel 1 of the vehicle; wherein the said rotor 8 circumferentially surrounds the stator 10; wherein the said surface or teeth of the stator 10 is covered by armature windings 11; wherein the said permanent magnets 9 are placed at an interval circumferentially along the surface of the rotor 8; wherein the said the rotor 8 outer surface directly connects with tire rim 7; and Wherein the said protecting cover 6 is connected with connecting rod 5.

2. Outer rotor in wheel motor as claimed in claim 1 , wherein there is an air gap between rotor 8 and stator 10 in wheel.

3. Outer rotor in wheel motor as claimed in claim 1, wherein the said protecting cover 6 covers stator 10 with armature winding 11 and rotor 8 with permanent magnets 9 of the wheel 1.

4. Outer rotor in wheel motor as claimed in claim 1, wherein one end of the said connecting rod 4 is connected with torque motors 2 and 3 to connect the wheel 1 with vehicle.

5. Outer rotor in wheel motor as claimed in claim 1, wherein the said protecting cover 6 is connected with one end of the connecting rod 5.

6. Outer rotor in wheel motor as claimed in claim 1, wherein the said another end of the connecting rod 5 is connected with torque motors 3.

7. Outer rotor in wheel motor as claimed in claim 1, wherein the said permanent magnets 9 are made up of materials not limited to rare-earth magnetic materials.

8. Outer rotor in wheel motor as claimed in claim 1, wherein the said torque motor 3 turns the wheel 1 from vertical to horizontal in fly mode and vice versa in drive mode.

9. Outer rotor in wheel motor as claimed in claim 1, wherein the said torque motors 12& 13 turns the propeller ring 14 from vertical to horizontal in take-off mode and vice versa in landing mode.

10. Outer rotor in wheel motor as claimed in claim 1, wherein the said torque motor 2 turns the wheel 1 right and left in drive mode.