Dual-rotating high-torque motor

Abstract

The present invention relates to a dual-rotating high-torque motor comprising a rotor and a stator, and allowing the stator to freely rotate without fixing same to a support frame, such that an inner rotor corresponding to the rotor and an outer rotor corresponding to the stator respectively rotate in opposite directions, or each of the inner rotor corresponding to the rotor and the outer rotor corresponding to the other rotor on the outer surface of the stator generates rotational force. According the present invention, torque generated in opposite directions by the inner rotor and the outer rotor is used such that lightweight and high-efficiency characteristics can be achieved and a propeller capable of high-torque and low-speed rotation can be designed and manufactured, thereby reducing power consumption for generating the same thrust, directly driving the propellers attached to the inner rotor and the outer rotor, and maximizing cooling efficiency and obtaining high continuous thrust by means of a cooling device provided in the propeller.

Description

Dual-rotation high-torque motor

[0001] The present invention relates to a dual-rotation high-torque motor, and more specifically, to a dual-rotation high-torque motor configured by freely rotating the stator of the motor to generate low-speed high torque or by adding a rotor outside the stator.

[0002]

[0003] Generally, a motor is a type in which an external stator is fixed and an internal rotor rotates; when electricity is applied, an induced magnetic field is generated in the rotor, which produces rotational force as a reaction force against the stator, exhibiting high speed and low torque characteristics. When such a motor is used in applications requiring high torque, a reduction gear must be connected. However, this results in problems of motor efficiency loss and weight increase. To address this, hollow motors with enlarged moment arms and a hollow center have been developed.

[0004] Conventionally, when electricity is applied to a motor, heat generation occurs due to resistance components, and this heat generation causes motor performance problems such as reduced magnetic force, fire, and loss.

[0005]

[0006] The present invention aims to solve the above problems by developing a low-speed, high-torque motor that eliminates the use of a reduction gear, reduces the weight of the propulsion system, increases cooling efficiency, and provides a low-speed, high-torque motor with increased continuous output.

[0007] In addition, another objective of the present invention is to enable the stator of the motor to rotate freely so that the stator and the rotor each generate the same torque in opposite directions, and to enable the use of double the torque by embedding a gear between the stator and the rotor, adding a rotor outside the stator of the motor, or driving each propeller, etc.

[0008] In addition, another objective of the present invention is to configure the propeller to rotate using a vacuum cooling method inside the motor, thereby maximizing the cooling efficiency of the motor and enabling continuous increase in output.

[0009]

[0010] To achieve the above objective, the present invention is characterized by being configured so that a stator fixed to the body of a motor can rotate freely.

[0011] In addition, the present invention is characterized by the fact that the inner rotor and the outer rotor rotate in opposite directions to each other.

[0012] In addition, the present invention is characterized by configuring a motor that rotates in opposite directions by combining rotors inside and outside the stator, respectively, and configuring a propeller for cooling.

[0013] In addition, the present invention is characterized by being configured as a hollow motor to generate high torque by combining the torque generated through gears into a single shaft with two rotors rotating in opposite directions, or by applying a load to each rotor separately, or to increase the moment arm when greater torque is required.

[0014] In addition, the dual-rotation high-torque motor of the present invention is characterized by having a propeller attached to an internal rotor and a vacuum cooling device installed inside the propeller to improve cooling performance.

[0015] In addition, when applying the dual-rotation high-torque motor of the present invention to a propeller, propellers are mounted on the outer rotor and the inner rotor, respectively, and rotated in opposite directions to generate thrust, thereby enabling the reduced rotational speed to be adjusted to a rotational speed suitable for propeller efficiency.

[0016] In addition, the dual-rotation high-torque motor of the present invention is characterized by being configured to function as a heat sink in a circulating form, in which the interior of the propeller mounted on the internal rotor is made into a vacuum hollow shape, and a portion of cooling water is injected to lower the vaporization temperature of the cooling water. When the cooling water vaporizes due to the heat generated during motor operation, it is liquefied for cooling in a region far from the motor, which is a region with a relatively low temperature, and the low-temperature liquefied cooling water moves to the high-temperature motor part by centrifugal force to vaporize and cool.

[0017]

[0018] According to the present invention, a dual-rotation high-torque motor can be directly applied to vehicles and / or aircraft by utilizing the torque generated in opposite directions by the inner rotor and the outer rotor by freely rotating the outer rotor, which corresponds to the stator, so that they rotate in opposite directions due to mutual repulsion.

[0019] In addition, by configuring the inner rotor and outer rotor of the two high-torque motors to rotate in opposite directions, thereby doubling the torque and reducing the speed by half, there is no need to apply a reduction gear with a lightweight mount structure that has no half-torque, thus minimizing power loss.

[0020] In addition, by configuring the structure such that the stator of both high-torque motors is fixed and an external rotor is added to the outer surface, the internal rotor and the external rotor each generate the same torque without loss of magnetic flux while the power consumption is the same, thereby obtaining a total of twice the torque.

[0021] In addition, by applying a vacuum chamber-type cooling fan system to the internal rotor, the dual-rotation high-torque motor drives a propeller with high cooling efficiency, thereby increasing the motor's cooling efficiency. This allows it to be directly applied to aircraft that generate thrust from propellers without separate additional devices, or it can also be applied to commercial motors.

[0022] In addition, by configuring the stator of a high-torque motor to rotate, the rotational speed is reduced by the inverse ratio of the torque when the torque connected to the stator and the rotor is the same and when the torque connected to each is different, thereby reducing the rotational speed to half compared to a conventional motor, which reduces the rotational angular velocity and exhibits excellent performance in propeller drives, which are advantageous for low speed and high torque. Furthermore, since an anti-torque equal to the torque of the rotor is generated in the rotating stator and the torque of the motor body is canceled out, there is an advantage in designing the motor mounting part. Additionally, by adding a rotor outside the stator and having each rotor generate an anti-torque, only shear stress is generated in the stator, and there is an advantage in canceling out the torque.

[0023]

[0024] FIG. 1 is a conceptual diagram illustrating a comparison between a high-torque motor (b) and a general motor (a), in which the stator is configured as a rotor, according to the first embodiment of the present invention.

[0025] FIG. 2 is a conceptual diagram illustrating a comparison between a high-torque motor (b) and a general motor (a), in which a rotor is further coupled to the outer surface of a stator, according to a second embodiment of the present invention.

[0026] FIG. 3 is a conceptual diagram showing a dual-rotation high-torque motor in which the inner rotor and the outer rotor are connected by gears to combine torque on a single shaft, as a third embodiment according to the present invention.

[0027] FIG. 4 is a conceptual diagram showing a structure in which a cooling fan is applied to the inner rotor of a dual-rotation high-torque motor that generates power internally and externally according to the present invention.

[0028] FIG. 5 is a conceptual diagram showing a structure in which cooling fans are applied to the inner rotor and the outer rotor, respectively, of a dual-rotation high-torque motor that generates power internally and externally according to the present invention.

[0029] FIG. 6 is a conceptual diagram of a dual-rotation high-torque motor according to the first embodiment of the present invention applied to a propeller.

[0030] FIG. 7 is a conceptual diagram of a dual-rotation high-torque motor according to a second embodiment of the present invention applied to a propeller.

[0031] FIG. 8 is a conceptual diagram of a dual-rotation high-torque motor configured with internal and external synchronization gears according to a second embodiment of the present invention applied to a propeller.

[0032] FIG. 9 is a conceptual diagram showing a cooling fan applied to the inner and outer propellers of a dual-rotation high-torque motor according to the present invention.

[0033] FIG. 10 is a conceptual diagram showing the torque change phenomenon of a hollow motor applied to a double-rotation high-torque motor according to the present invention, FIG. 10(a) is a general motor with radius r, FIG. 10(b) is a general motor with increased radius (R), FIG. 10(c) is a conceptual diagram for explaining the torque and weight change of a hollow motor according to the present invention in which the radius is increased (R) and the weight per unit length is reduced at a ratio of r / R to equalize the weight.

[0034]

[0035] The present invention may be subject to various modifications and may have various embodiments, specific embodiments are illustrated in the drawings, and the description of the invention is explained in detail.

[0036] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0037] The terms and words used in this invention are used merely to describe specific embodiments and are not intended to limit the invention. Based on the principle that the concepts of the terms can be appropriately defined to best describe one's invention, they should be interpreted in a meaning and concept consistent with the technical spirit of this invention.

[0038] The dual-rotation high-torque motor according to the present invention is configured so that the stator can rotate freely, and the stator and rotor each generate the same torque in opposite directions. A gear is embedded between the stator and the rotor to generate double the torque, or a propeller is driven to use the torque that has been doubled.

[0039] The specific features and advantages of the dual-rotation high-torque motor according to the present invention will become clearer from the following description with reference to the attached drawings.

[0040]

[0041] [First Embodiment]

[0042] The dual-rotation high-torque motor (10) according to the present invention is configured such that, in a general motor comprising a rotor (1.1) and a stator (1.3), the stator (1.3) is not fixed to a support frame and can rotate freely, thereby configuring the inner rotor (11) corresponding to the rotor (1.1) and the outer rotor (12) corresponding to the stator (1.3) to rotate in opposite directions.

[0043] Looking at the general motor that forms the basis of the present invention, the general motor is configured such that the rotor (1.1) rotates by magnetic repulsion by installing or fixing the stator (1.3) to a support frame, and is configured to obtain rotational power by periodically switching the applied electricity using the characteristic of pushing and pulling each other by magnetic force by installing a permanent magnet or an electromagnet.

[0044] The torque and output (Power) of such a general motor are given by the following mathematical formula 1.

[0045]

[0046] *(Mathematical Formula 1)

[0047]

[0048] Here, P is Power, T is Torque, and ω is Angular Velocity.

[0049] Referring to FIG. 1, the dual-rotation high-torque motor (10) according to the present invention is configured so that the external rotor (12), which corresponds to the stator (1.3) that generates power internally and externally, can rotate freely. By causing the internal rotor (11) and the external rotor (12) to rotate in opposite directions (Dual Spin) due to mutual repulsion, they generate torque in opposite directions. Unlike a general motor that transmits the anti-torque acting on the stator (1.3) to the support frame, the anti-torque is transmitted to the external rotor (12) that rotates freely, and is configured so that the anti-torque can be used as output (Power).

[0050] In addition, the torque and output (Power) of the dual-rotation high-torque motor (10) according to the present invention can be expressed as shown in the following mathematical formula 2.

[0051] (Mathematical Formula 2)

[0052]

[0053] Here, P is Power, T is Torque, and ω is Angular Velocity.

[0054] Furthermore, the dual-rotation high-torque motor (10) according to the present invention causes the outer rotor (12) and the inner rotor (11) to rotate in opposite directions due to half torque, thereby reducing the rotational speed of the inner rotor (11), and when a load of the same torque is applied, the inner rotor (11) and the outer rotor (12) rotate at half the speed of a standard motor.

[0055] Accordingly, the dual-rotation high-torque motor of the present invention has low-speed high-torque characteristics in which, when using the same power, twice the torque is generated compared to a general motor and the rotational speed is reduced to half.

[0056] An example of applying the low-speed high-torque characteristics of the dual-rotation high-torque motor (10) of the present invention to vehicles or electric aircraft is described as follows.

[0057] First, a dual-rotation high-torque motor (10) according to the present invention is applied to the drive unit of a vehicle.

[0058] In other words, by utilizing the characteristic that the rotational speed changes in inverse proportion to the required torque of each when the load applied to the inner rotor and the outer rotor is different, the motor is directly connected to the wheel without a separate differential gear, thereby allowing the rotational speeds of the left and right wheels to be configured differently when the vehicle turns, thus achieving the same effect as a differential gear.

[0059] Next, the dual-rotation high-torque motor (10) according to the present invention is applied to the thrust device of an electric aircraft.

[0060] Referring to FIGS. 6 to 8, when the dual-rotation high-torque motor (10) according to the present invention is applied to the propeller of an aircraft, propellers (21, 22) are attached to the inner rotor (11) and the outer rotor (12), respectively, to obtain thrust in the same direction.

[0061] At this time, the inner propeller (21) of the inner rotor and the inner propeller (22) of the outer rotor rotate in opposite directions to each other, but are configured so that thrust in the same direction can be obtained by arranging the propeller pitches in opposite directions.

[0062] Accordingly, when the propeller of the dual-rotation high-torque motor (10) according to the present invention is integrated, as shown in FIG. 1b, twice the torque is generated compared to a general motor and the rotational speed is reduced to half, and it can be configured to match the propeller performance without a separate reduction gear.

[0063] In addition, the double-rotation high-torque motor (10) according to the present invention can be manufactured as a hollow motor (20) in a hollow form. That is, as shown in FIG. 10b, if the radius (r) of a standard motor of the same size is increased, the torque (T2) becomes proportional to the square of the radius (R), and the weight (W2) becomes proportional to the radius (R).

[0064] In addition, if the hollow motor (20) has the same weight (W1=W3) as a standard motor and only increases the radius (r → R), the cross-sectional area decreases by the reciprocal of the radius (R), and the total torque (T3) increases in proportion to the radius (R).

[0065] Therefore, if the hollow motor (20) of the double-rotation high-torque motor (10) according to the present invention is installed in the middle of the propeller, the radius of the hollow motor can be adjusted, thereby enabling the configuration of a propeller that produces optimized torque and speed.

[0066] Next, referring to FIG. 9, the cooling fan (21.1, 22.1) system of a dual-rotation high-torque motor (10) according to the present invention is provided with a hollow vacuum chamber, i.e., a cooling fan (21.1, 22.1), inside the propeller (21, 22) coupled to the internal rotor (11). By injecting a small amount of cooling water, the vaporization point of the cooling water can be lowered according to the degree of vacuum in a vacuum state, and the heat generated in the hollow motor can be vaporized and cooled using this.

[0067] At this time, the cooling water of the cooling fan (21.1, 22.1) can be configured to form a heat exchange circulation structure in which heat exchange occurs at the center of the propeller (21, 22) where the temperature is low, and the liquefied cooling water becomes liquefied, and moves back toward the hollow motor (20) by centrifugal force as the specific gravity increases. Furthermore, as shown in FIG. 9, the cooling structure of the cooling fan provides a cooling effect of the air-cooled motor at the level of a water-cooled motor without a separate heat exchanger system, thereby increasing the continuous output of the lightweight air-cooled motor.

[0068] In the dual-rotation high-torque motor (10) according to the present invention, if the internal rotor (11) is used for cooling, the torque of the cooling fan (20.1) is a case where drag is minimized by a propeller for cooling only without generating thrust, but some power and torque loss due to drag may occur.

[0069] The torque consumed by the inner propeller (21) of the inner rotor (11) is t f When that is the case, the following mathematical formula 3 can be derived.

[0070] (Mathematical Formula 3)

[0071]

[0072] Here, T o ε is the external rotor torque, T i is the internal rotor torque, t f is the torque of the cooling fan.

[0073] Therefore, as shown in Fig. 4, the total generated torque is twice that of a general motor at t f You can see that the loss occurs to that extent.

[0074]

[0075] [Second Embodiment]

[0076] Referring to FIG. 2, the dual-rotation high-torque motor (10) according to the present invention has a structure in which an outer rotor (12) is further combined with an inner rotor (11) corresponding to the rotor (1.1) of a general motor and an outer rotor (1.3) on the outer surface of the stator (1.3).

[0077] The dual-rotation high-torque motor (10) according to the present invention has the same power consumption (P) as a conventional motor. i In the state of =Tω), the inner rotor (11) and the outer rotor (12) each generate the same torque, thereby producing twice the torque (T) and twice the output (P) at the same rotational speed (ω). o It can be configured to obtain =2Tω).

[0078] In addition, the dual-rotation high-torque motor (10) according to the present invention can be configured such that the weight increases by 1.5 times due to the addition of an external rotor (12), but the output increases by 2 times compared to the input.

[0079] In addition, if the dual-rotation high-torque motor (10) of the present invention according to the second embodiment is configured with the same output as a general motor, the weight can be reduced to approximately 25% and the power consumption can be reduced to approximately 50%, thereby configuring a high-efficiency high-torque motor.

[0080] And, as shown in FIG. 8, the double-rotation high-torque motor (10) of the present invention according to the second embodiment can be configured such that the inner rotor (11) and the outer rotor (12) can be driven in opposite directions by combining inner and outer synchronized gears (24) so ​​that the angular velocity and relative phase arrangement of the inner rotor (11) and the outer rotor (12) are identical.

[0081]

[0082] [Third Embodiment]

[0083] Referring to FIG. 3, the dual-rotation high-torque motor (10) according to the present invention is configured such that the torque applied to the inner rotor (11) and the outer rotor (12), respectively, is integrated into a single shaft through a gear (14).

[0084] The dual-rotation high-torque motor (10) according to the present invention consumes power (P i =Tω) In this same state, it exhibits twice the torque and half the rotational speed compared to a standard motor.

[0085] In addition, the double-rotation high-torque motor (10) according to the third embodiment of the present invention has the advantage of not generating half-torque, in addition to performance similar to that of a general motor equipped with one reduction gear.

[0086] In addition, the dual-rotation high-torque motor (10) according to the present invention is configured by applying a cooling fan system (21.1, 22.1) to the inner rotor (11) and the outer rotor (12), respectively, using a gear (14) to produce an output that combines the power of the inner rotor (11) to the shaft of the outer rotor (12), as shown in FIG. 5.

[0087] At this time, the problem of heat generation in the electric speed controller can be resolved by combining the electric speed controller with the wake of the cooling fan.

[0088] The torque (T) of the cooling fan (21.1, 22.1) applied to the inner rotor (11) and the outer rotor (12) of the dual-rotation high-torque motor (10) that generates power internally and externally according to the present invention o ) can be expressed by the following mathematical formula 4.

[0089] (Mathematical Formula 4)

[0090]

[0091] Here, T o ε is the output torque of the inner and outer rotors, T is the torque of the inner rotor, and t fo is the torque of the external rotor (propeller) cooling fan, t fi is the torque of the internal rotor (propeller) cooling fan.

[0092] As described above, the dual-rotation high-torque motor according to the present invention has the following features.

[0093] The present invention is configured such that an external rotor corresponding to the stator rotates freely and rotates in opposite directions due to mutual repulsion.

[0094] Therefore, it can be directly applied to vehicles and / or aircraft that utilize torque generated in opposite directions by an inner rotor and an outer rotor.

[0095] In addition, the present invention is configured such that the inner rotor and the outer rotor rotate in opposite directions, thereby increasing the torque by twofold and decreasing the speed by half.

[0096] Therefore, it is a lightweight mount structure without half-torque, and since there is no need to apply a reduction gear, power loss can be minimized.

[0097] In addition, the present invention is configured with a structure in which an external rotor is added to the outer surface of the stator of a general motor.

[0098] Therefore, since the inner rotor and the outer rotor each generate the same torque while the power consumption is the same, a total torque twice that of a standard motor can be obtained.

[0099] In addition, the present invention is configured by applying a vacuum chamber-type cooling fan system to the internal rotor.

[0100] Therefore, it can be directly applied without an additional cooling device to aircraft that generate thrust by driving propellers requiring high cooling efficiency, or it can also be applied to commercial motors.

[0101]

[0102] The dual-rotation high-torque motor according to the present invention can be applied to vehicles or aircraft that utilize high-torque rotational force, and can be applied to aircraft that obtain thrust by driving a propeller without additional devices, and can also be applied to commercial motors.

Claims

1. A dual-rotation high-torque motor comprising a rotor (1.1) and a stator (1.3), configured such that an outer rotor (12) corresponding to the stator (1.3) can rotate freely, and an inner rotor (11) corresponding to the rotor (1.1) and an outer rotor (12) can rotate in opposite directions (Dual Spin) due to mutual repulsion, thereby generating torque in opposite directions for each, and transmitting the anti-torque acting on the stator (1.3) to the outer rotor (12) to be used as output (Power). Due to the anti-torque of the outer rotor (12) and the inner rotor (11), the rotational speed of each rotor (11) is reduced to half, and the torque is generated equally, so that the total torque is doubled. A gear (14) is coupled between the inner rotor (11) and the outer rotor (12) to combine the output torque into a single shaft, and A dual-rotation high-torque motor characterized by configuring a vacuum chamber type cooling fan (21.1, 22.1) in which a heat exchange circulation structure is formed between the blade tip and the hollow motor (20) by providing a hollow vacuum space (Vacuum Chamber) inside each blade of the inner propeller (21) and / or outer propeller (22) that does not generate thrust of the inner rotor (11) and / or outer rotor (12).

2. A high-torque motor comprising a rotor (1.1) and a stator (1.3), wherein the rotor is further coupled to the outer surface of the stator, The internal rotor (11) corresponding to the above rotor (1.1) and the external rotor (12) coupled to the outer surface of the stator (13) are configured to generate rotational force, respectively. A vacuum chamber type cooling fan (21.1, 22.1) is configured such that a heat exchange circulation structure is formed between the blade tip and the hollow motor (20) by providing a hollow vacuum chamber inside each blade of the inner propeller (21) and / or outer propeller (22) that does not generate thrust of the inner rotor (11) and / or outer rotor (12). A dual-rotation high-torque motor characterized by having an inner rotor (11) and an outer rotor (12) configured with an inner and outer synchronization gear (24) that matches the relative phase and angular velocity so that they can rotate in opposite directions.

3. In either Claim 1 or Claim 2, The above inner rotor (11) and outer rotor (12) are composed of a hollow motor (20), and the hollow motor (20) is characterized by the total torque becoming R / r times the motor's radius of the motor rotor increasing (r → R) and the torque (T) increasing.

4. A dual-rotation high-torque motor according to claim 3, characterized in that an inner propeller (21) and an outer propeller (22) are coupled to the inner rotor (11) and / or outer rotor (12) to directly generate thrust.

5. In Claim 4, A double-rotation high-torque motor characterized by having an electronic speed controller (ESC) integrally formed in the wake of the cooling fan (21.1) of the internal propeller (21).

6. A dual-rotation high-torque motor according to claim 5, characterized in that the dual-rotation high-torque motor is configured to be applied to the drive unit of a vehicle and used in place of a differential gear.

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