D-shaped iron core stator and high-speed disc type shaftless motor with same

Abstract

The invention relates to the technical field of motors, in particular to a D-shaped iron core stator and a high-speed disc type shaftless motor with the same, and the D-shaped iron core stator comprises a D-shaped stator iron core, and the two stator iron cores are symmetrically spliced to form a complete stator iron core; the stator coil winding is provided with inclined notches, and the two ends of the stator iron core are embedded into the inclined notches respectively; the high-speed disc type shaftless motor is realized based on a D-shaped iron core stator and comprises a shell, a tip shell and a flow channel, the rotor assembly comprises double rotors without back iron; the D-shaped iron core stator design improves the magnetic performance, the symmetrical skewed slot structure is matched to optimize the operation stability, the composite material and splicing design enhances the structural strength, and the 3D printing self-supporting winding reduces the loss control; a lightweight rotor topology and an adaptive output structure are adopted, and the fluid mechanical property is further optimized according to the paddle design of specific application; and the self-adaptive cooling flow channel realizes accurate heat dissipation through a multi-cavity grid layout.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a D-shaped core stator and a high-speed disc-type shaftless electric machine having the same. BACKGROUND

[0002] With the rapid development of new energy, high-end equipment manufacturing and other industries, higher requirements are put forward for the power density, lightweight, running stability and multi-scene adaptability of electric machine equipment. In the current electric machine technology field, there are still many technical defects to be solved in the design of stator structure, shaftless electric machine body and heat dissipation system, which restricts the improvement of the comprehensive performance of electric machines.

[0003] In the design of stator core, the traditional stator core adopts a cylindrical integrally formed structure or a straight-line expanded roll structure, which has the following significant deficiencies: first, the magnetic performance is limited, the conventional silicon steel sheet material and assembly process result in low core permeability and insufficient air gap magnetic density, which directly affects the improvement of the power density of the electric machine; second, the running stability is poor, the traditional integer slot winding design is easy to produce high harmonic distortion rate and tooth slot torque, which causes vibration and noise problems in the running process of the electric machine, affecting the use experience; third, the structure and processing adaptability is poor, the integrally formed structure has low assembly flexibility, the roll structure needs to be pre-shaped during the merging process, the process is complicated and the deformation amount at the connection is large, which is easy to cause fracture or poor contact, and the mechanical strength of the core is insufficient, which is difficult to adapt to high-speed running conditions; fourth, the winding design has limitations, the traditional winding relies on the yoke support, which is easy to produce additional iron loss, and the limited winding space results in low slot fill rate and large coil current density, which further aggravates the problems of loss and temperature rise.

[0004] In the field of high-speed disc-type shaftless electric machines, the existing technology still faces multiple bottlenecks: on the one hand, it is difficult to balance lightweight and space efficiency, the traditional shaft electric machine has complex shaft structure and heavy weight, and even the existing shaftless electric machine also has problems such as rotor back iron design and redundant winding support structure, which results in high overall weight and large axial size, and cannot meet the application requirements of space-limited scenes; on the other hand, the energy efficiency level needs to be improved, the iron loss control of the traditional electric machine is not good, especially the yoke iron loss ratio is high, and the power output structure is single and has poor adaptability, which is difficult to compatible with different types of power output requirements; for special application scenes such as rim thrusters, the existing blades are often arranged radially symmetrically, which has the problems of insufficient thrust density, strong tail vortex, easy cavitation at the blade tip, and unreasonable blade connection method, which is not convenient for disassembly and maintenance and is easy to be damaged by water flow.

[0005] The Chinese patent with the granted publication number CN115733323B discloses a five-degree-of-freedom super-high-speed bearingless permanent magnet motor, both ends of a cylindrical solid permanent magnet are connected with a rotating shaft, the cylindrical solid permanent magnet is externally installed with a shell, a stator core is fixedly installed on the shell, a bottom layer of the stator core is embedded with a set of torque windings, an upper layer of the stator core is embedded with two sets of suspension windings, end covers are fixedly installed on both sides of the shell, auxiliary bearings are installed between the end covers and the rotating shaft, and the end covers and the rotating shaft are both nested with passive permanent magnetic bearings. The invention integrates the magnetic suspension bearing and the permanent magnet motor, so that the motor can generate radial suspension force to overcome the gravity of the rotor and the single-side magnetic force while generating electromagnetic torque to drive the rotation of the rotor, the motor structure is simplified and the axial length of the motor is shortened, the double-suspension windings and the axial passive permanent magnetic bearing realize five-degree-of-freedom control, the stiffness and the critical speed of the super-high-speed motor rotor are increased, and the operation stability and the anti-disturbance capability are improved.

[0006] However, due to the high degree of integration in the above patent, heat cannot be discharged during high-speed rotation, especially in the wheel rim propeller scene, it is necessary to ensure water sealing and timely heat exchange to ensure normal working efficiency and avoid the influence of heat on working efficiency. SUMMARY

[0007] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0008] In view of the problems existing in the prior art, the present application is proposed.

[0009] To solve the above technical problems, the present application provides the following technical solutions: a stator core, the stator core is in the shape of "D", two stator cores are symmetrically spliced into a complete stator core, and the connection of each stator core is filled with magnetic conductive glue; and a stator coil winding, a beveled slot is formed in the stator coil winding, and the two ends of the stator core are respectively embedded in the beveled slot.

[0010] The present application also discloses a high-speed disc-type shaftless motor, which comprises a shell, the shell is used for isolating the inside and outside of the motor, the shell comprises a central cylindrical shell and two tip shells arranged at both ends of the cylindrical shell, and flow channels are arranged in communication between the outer walls of the two tip shells and the inner wall of the cylindrical shell; a stator assembly, comprising two rows of D-shaped core stators arranged in an array, a stator core base arranged at the end of the D-shaped core stator, and an end cover embedded in the inner wall of the shell; The rotor assembly comprises a double rotor without back iron rotating on both sides of the end cover of the stator assembly, and the double rotor without back iron is arranged on the inner wall of the shell through bearings.

[0011] As a preferred scheme of the high-speed disc type shaftless motor, the output assembly further comprises an output end, which rotates synchronously with the double rotor without back iron and performs power output.

[0012] As a preferred scheme of the high-speed disc type shaftless motor, the flow channel comprises an inlet, a first chamber, a second chamber and an outlet, and the inlet and the outlet are arranged on the tip shell.

[0013] As a preferred scheme of the high-speed disc type shaftless motor, the first chamber and the second chamber are arranged inside the cylindrical shell, the cooling medium enters from the inlet and flows out from the outlet, and the flow value of the cooling medium entering the first chamber and the second chamber is controlled according to the temperature value distribution of each region.

[0014] As a preferred scheme of the high-speed disc type shaftless motor, a blocking plate is arranged at the connection between the first chamber and the second chamber, the blocking plate is a hollow cylinder split in half, and the opening of the second chamber is adjusted when the blocking plate rotates.

[0015] As a preferred scheme of the high-speed disc type shaftless motor, a rotating ring is further arranged in the first chamber, the rotating ring is fixedly connected with the blocking plate and rotates synchronously, and a rotating cylinder is further arranged in the first chamber, and the rotating cylinder controls the opening of the rotating ring.

[0016] As a preferred scheme of the high-speed disc type shaftless motor, a sliding hole is arranged on the rotating ring, a transmission column is arranged on the rotating cylinder, and the transmission column is slidingly arranged in the sliding hole.

[0017] As a preferred scheme of the high-speed disc type shaftless motor, an adjusting ring is further slidingly arranged on the outer wall of the rotating cylinder, a helical groove is arranged on the outer wall of the rotating cylinder, a convex column is arranged on the inner wall of the adjusting ring, and the convex column is slidingly arranged in the inner wall of the helical groove.

[0018] The application has the beneficial effects that: through the innovative D-shaped core stator design, the magnetic performance is improved by virtue of high-quality materials and special filling process, the operation stability is optimized by the symmetrical skew slot structure, the structural strength is enhanced by the composite material and splicing design, and the 3D printing self-supporting winding helps loss control; the high-speed disc type shaftless motor adopts a lightweight rotor topology and an adaptive output structure, and takes into account space efficiency, comprehensive energy efficiency and multi-scene versatility, and the paddle design for specific applications further optimizes the fluid mechanics performance; the self-adaptive cooling flow channel realizes precise heat dissipation through a multi-chamber grid layout, is compatible with multiple cooling media and use scenarios, and has low resistance design, convenient disassembly and assembly characteristics, flow direction adjustment, backflushing and other expansion functions to ensure operation stability; the modules cooperatively form the comprehensive advantages of high energy efficiency, lightweight and low vibration, and are superior to the traditional scheme in core performance, and through structure reuse and process simplification, cost control is realized, and strong technical competitiveness is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. Among them: Figure 1 It is a whole schematic diagram of the D-shaped core stator in the application; Figure 2 It is a schematic diagram of the skew slot position in the application; Figure 3 It is a schematic diagram of the stator assembly area in the application; Figure 4 It is a schematic diagram of the shell outside in the application; Figure 5 It is an exploded schematic diagram of the internal structure of the shell in the application; Figure 6 It is a schematic diagram of the stator and rotor cooperation in the application; Figure 7 It is a schematic diagram of the distribution of the first chamber and the second chamber in the application; Figure 8 It is a structure diagram of the connection between the first chamber and the second chamber in the application; Figure 9 It is a schematic diagram of the internal structure of the rotating cylinder in the application.

[0020] Explanation of reference signs: 100, stator core; 101, stator coil winding; 102, skew slot; 200, shell; 201, stator core base; 2001, cylindrical shell; 2002, tip shell; 2003, flow channel; 2004, inlet; 2005, first chamber; 2006, second chamber; 2007, outlet; 2008, blocking plate; 2009, rotating ring; 2011, sliding hole; 2012, rotating cylinder; 2013, transmission column; 2014, adjusting ring; 2015, helical groove; 2016, protruding column; 2022, end cover; 300, double rotor without back iron; 3001, limiting block; 3002, first ring groove; 3003, second ring groove; 3004, sliding groove; 400, output end. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0023] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent or alternative to other embodiments.

[0024] Embodiment 1 Reference Figures 1-8 For the first embodiment of the present application, the embodiment provides a D-shaped core stator, specifically comprising: A stator core 100, the stator core 100 is "D" shaped, two stator cores 100 are symmetrically spliced into a complete stator core, and the connection of each stator core 100 is filled with magnetic conductive glue; And a stator coil winding 101, the stator coil winding 101 is provided with an inclined slot 102, and the two ends of the stator core 100 are respectively embedded in the inclined slot 102.

[0025] Among them, the stator coil winding 101 is 3D printed by carbon nylon material, which is used for winding coil; The stator core 100 is made of 23QG090 silicon steel sheet, which has obvious magnetic anisotropy and high magnetic induction strength, thereby improving the power density of the device.

[0026] More preferably, the stator core 100 is a split half-elliptical shape, and the profile is a "D" shape. After the two stator cores 100 are centered and adhered, a complete stator assembly is formed. The stator core 100 is filled with a magnetic conductive glue, so that the magnetic permeability u_r of the stator core 100 is improved, and the air gap magnetic flux is increased by 19% compared with the conventional scheme. Further, the mechanical strength of the stator core 100 is improved by 40% due to the epoxy resin-ferrite composite.

[0027] Preferably, the inclined slots 102 on the stator coil winding 101 are symmetrically arranged and have a certain inclination angle with the outer surface of the stator coil winding 101. The inclination angle is set according to the number of each coil of the stator coil winding 101. It has been verified that the inclined slot effect in this embodiment is significantly better than that of a general disc motor. The harmonic distortion rate is only 3%, which is much lower than the 8% of the conventional integer slot. The cogging torque is reduced by 78%.

[0028] Embodiment 2 Reference Figures 1-8 This embodiment provides a high-speed disc shaftless motor based on the D-shaped core stator described above.

[0029] Specifically, a high-speed disc shaftless motor includes a shell 200 for isolating the inside and outside of the motor. The shell 200 includes a central cylindrical shell 2001 and pointed end shells 2002 arranged at both ends of the cylindrical shell 2001. The outer walls of the two pointed end shells 2002 and the inner part of the cylindrical shell 2001 are provided with communication flow channels 2003. The stator assembly includes two rows of D-shaped core stators arranged in an array, a stator core base 201 arranged at the end of the D-shaped core stator, and an end cover 2022 embedded in the inner wall of the shell 200. The rotor assembly includes a double rotor without back iron 300 rotatably arranged at the two side end covers of the stator assembly. The double rotor without back iron 300 is rotatably arranged on the inner wall of the shell 200 through a bearing.

[0030] The double rotor without back iron 300 has a relatively light structure and has obvious topological advantages. The structure weight of the double rotor without back iron 300 is 35 kg / 50 kW, which is much lighter than the conventional 54 kg / 50 kW. In terms of space efficiency, the axial length is shortened by 40%. The self-supporting winding eliminates the yoke loss, and the iron loss is reduced by 50%.

[0031] More preferably, the motor further includes an output assembly including an output end 400 that rotates synchronously with the double rotor without back iron 300 to output power. Adaptively, the output end 400 in this embodiment can also adopt a rotating shaft structure, which is compatible with various application scenarios, such as high-speed fan motors and land driving motors.

[0032] Further, in other embodiments, the output end 400 application scenario can also be a rim propeller, and the output end 400 is a impeller group including helical blades arranged in rotation, the helical blades use the Venturi effect and asymmetric layout, the thrust density reaches 189 N / kW, which is higher than 142 N / kW of the radial symmetric blades. Through Fluent flow field simulation comparison, the tail vortex intensity is reduced by 65%, and the blade tip cavitation phenomenon is effectively eliminated.

[0033] More preferably, the blade layout adopts a design of 2 helical lines / 4 blades with an angle of 45°, which makes the water flow shear force distribution uniform, further optimizes the performance of the helical blades in fluid mechanics, improves the overall performance of the propeller, and comprehensively realizes the effects of high energy efficiency, light weight, high speed and low vibration.

[0034] Embodiment 3 Reference Figures 1-8 For the third embodiment of the application, the embodiment is based on embodiment 2.

[0035] Specifically, the flow channel 2003 includes an inlet 2004, a first chamber 2005, a second chamber 2006 and an outlet 2007, the inlet 2004 and the outlet 2007 are provided on the tip shell 2002, the first chamber 2005 and the second chamber 2006 are integrally arranged inside the cylindrical shell 2001, the cooling medium enters from the inlet 2004 and flows out from the outlet 2007, and the flow value of the cooling medium entering the first chamber 2005 and the second chamber 2006 is controlled according to the temperature value distribution of each region.

[0036] Among them, the flow channel 2003 is arranged in a circumferential array on the outer wall of the shell 200, and exchanges heat with each region respectively, the first chamber 2005 is a linear cylindrical chamber, the axis direction of which coincides with the inlet 2004 and the outlet 2007, and also coincides with the forward direction of the shaftless motor, so that the flow rate of the entering cooling medium reaches the fastest, that is, when the cooling medium passes through the first chamber 2005, the cooling effect is best; More preferably, the second chamber 2006 forms an angle with the first chamber 2005 and is connected to the first chamber 2005 on the other side, thereby forming a grid-shaped heat dissipation net covering each heating prone region of the motor.

[0037] Among them, in the underwater application scenario, such as the rim propeller, the cooling medium is water flow when the motor moves, and the water flow is passively through the flow channel 2003 while moving, and at the same time, heat exchange is carried out; in the air scenario, the cooling medium is air; in the in-place use scenario, an external cooling liquid can be connected as the cooling medium.

[0038] Preferably, the inlet 2004 is in the shape of a shovel, one side of which is in the shape of a cut open mouth, so that the flow resistance of the cooling medium is reduced, the flow value of the cooling liquid passing through the inlet 2004 is always maintained at a high value, and the heat exchange effect is guaranteed. At the same time, the outlet 2007 can be used as a mounting screw hole to fix the two tip shells 2002 to the cylindrical shell 2001 on the motor model that does not need to be cooled, thereby reducing the cost.

[0039] In underwater or other scenarios, the outlet 2007 and the flow channel 2003 are used as cooling holes through welding and sealing glue double fixation, thereby being compatible with various use scenarios.

[0040] In the scenario that needs to be disassembled and repaired, a bolt and sealing glue are used for connection, wherein the bolt is a hollow bolt, the outer end of which is connected with the one-way valve pipe to facilitate the entry of the cooling medium and maintain the appropriate working environment temperature during fixed installation.

[0041] The first chamber 2005 and the second chamber 2006 are connected and rotatably provided with a blocking plate 2008, which is a hollow cylinder split in half. The blocking plate 2008 is rotated to adjust the opening degree of the second chamber 2006.

[0042] Preferably, the second chamber 2006 is opened on the outer wall of the first chamber 2005, and the blocking plate 2008 can rotate against the inner wall of the first chamber 2005. In the initial state, the blocking plate 2008 completely covers the hole of the second chamber 2006. With the rotation of the blocking plate 2008, part of the cooling medium enters the second chamber 2006, and at this time, the cooling medium partially enters the second chamber 2006 and exchanges heat with the inner wall thereof; More preferably, the first chamber 2005 can also be arranged in a direction that is not parallel, but symmetric with the second chamber 2006. At this time, the cooling effect of each chamber branch is the same, but the flow rate of the cooling medium is reduced due to the greater resistance, resulting in an increase in overall resistance. The first chamber 2005 is further rotatably provided with a rotating ring 2009, which is fixedly connected with the blocking plate 2008 and synchronously rotates. The first chamber 2005 is further rotatably provided with a rotating cylinder 2012, which controls the opening degree of the rotating ring 2009.

[0043] More preferably, the rotating ring 2009 is provided with a sliding hole 2011, and the rotating cylinder 2012 is provided with a transmission column 2013 that is slidingly arranged in the sliding hole 2011.

[0044] The rotating cylinder 2012 can slide up and down relative to the rotating ring 2009. When the rotating cylinder 2012 rotates, the rotating ring 2009 and the blocking plate 2008 synchronously rotate, thereby adjusting the blocking degree of the blocking plate 2008 to the second chamber 2006 and controlling the flow mode of the cooling medium.

[0045] Further, the outer wall of the rotating cylinder 2012 is also slidably provided with an adjusting ring 2014, the outer wall of the rotating cylinder 2012 is provided with a spiral groove 2015, and the inner wall of the adjusting ring 2014 is provided with a convex column 2016, which is slidably arranged in the inner wall of the spiral groove 2015.

[0046] The spiral groove 2015 is a spiral-shaped slot hole, and the convex column 2016 is in sliding contact with the inner wall thereof. When the adjusting ring 2014 slides along the inner wall of the first chamber 2005, the rotating cylinder 2012 is driven to rotate.

[0047] In the embodiment, the adjusting ring 2014 is controlled to slide forward and backward by a hydraulic cylinder, and cannot rotate by itself. In other embodiments, the displacement of the hydraulic cylinder is controlled by a cooling controller, and the cooling controller adjusts the displacement according to the temperature in the second chamber 2006, so as to finally adjust the liquid amount of the cooling medium.

[0048] Embodiment 4 Reference Figures 1-9 This is the fourth embodiment of the present application, which is based on embodiment 3.

[0049] The difference is that, in the embodiment, the first chamber 2005 is vertically arranged, and the two second chambers 2006 are symmetrically arranged at an angle of 30° with the first chamber 2005, so as to cover more cooling areas. The outer wall of one end of the rotating cylinder 2012 is symmetrically provided with a limiting block 3001, the inner wall of the first chamber 2005 is further provided with a first ring groove 3002 and a second ring groove 3003, and a sliding groove 3004 is arranged between the first ring groove 3002 and the second ring groove 3003.

[0050] More preferably, the first ring groove 3002 and the second ring groove 3003 are circular ring grooves, and the two circular rings are parallel to each other, and the sliding groove 3004 vertically penetrates the two ring grooves, so that the limiting block 3001 can rotate along the first ring groove 3002 and the second ring groove 3003 respectively, and simultaneously switch the position of the annular groove via the sliding groove 3004.

[0051] Preferably, when the limiting block 3001 is located in the sliding groove 3004, the blocking plate 2008 completely covers one second chamber 2006, and the limiting block 3001 is rotated by 180° each time, so as to drive the blocking plate 2008 to switch to the other side and cover the other second chamber 2006, thereby realizing the switching of the flow direction of the heat-conducting medium.

[0052] Through the above setting, the blocking plate 2008 can only rotate a fixed angle each time, switching between the two side chambers, the control logic including according to whether the data provided by the heat sensor exceeds the threshold, controlling the cylinder to move a certain range, adjusting the initial and rotating cylinder 2012 synchronous movement of the ring 2014, until the limit block 3001 enters another annular groove, at this time the two can be relative rotation, rotating cylinder 2012 rotates 180° to realize the switching of the cooling medium flow direction.

[0053] More preferably, when the flow channel 2003 is blocked by impurities, the reciprocating movement of the rotating cylinder 2012 is loosened, and the opening and closing of the adjacent two sets of flow channels 2003 and the opening and closing of the gate at the outlet 2007 are controlled to form a closed loop, and the cooling medium circulates continuously, enters from one side of the inlet 2004, and is discharged from the blocked end of the inlet 2004, realizing backflushing and unblocking.

[0054] Importantly, it should be noted that the configurations and arrangements of the present application shown in the various exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail herein, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, receiving arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the generality of the application. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to the particular embodiments described herein, but extends to various modifications that still fall within the scope of the appended claims.

[0055] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, which should be covered in the protection scope of the present application.

Claims

1. A D-type iron core stator, characterized in that: include: Stator core (100), the stator core (100) is "D" shaped, two stator cores (100) are symmetrically spliced ​​to form a complete stator core, and the connection of each stator core (100) is filled with magnetic adhesive; And a stator coil winding (101), wherein a slanted slot (102) is provided on the stator coil winding (101), and the two ends of the stator core (100) are respectively fitted into the slanted slot (102).

2. A high-speed disc-type shaftless motor, based on a D-type iron core stator as described in claim 1, characterized in that, include: The housing (200) is used to isolate the inside and outside of the motor. The housing (200) includes a central cylindrical shell (2001) and pointed shells (2002) at both ends of the cylindrical shell (2001). The outer walls of the two pointed shells (2002) and the inside of the cylindrical shell (2001) are provided with a communicating flow channel (2003). The stator assembly includes two rows of D-type iron core stators arranged in an array, a stator core base (201) located at the end of the D-type iron core stator, and an end cap (2022) embedded in the inner wall of the housing (200). The rotor assembly includes a back-iron-less dual rotor (300) rotatably disposed on both sides of the stator assembly end caps, the back-iron-less dual rotor (300) being rotatably disposed on the inner wall of the housing (200) via bearings.

3. The high-speed disc-type shaftless motor as described in claim 2, characterized in that: It also includes an output component, including an output terminal (400), which rotates synchronously with the back ironless dual rotor (300) to output power.

4. The high-speed disc-type shaftless motor as described in claim 3, characterized in that: The flow channel (2003) includes an inlet (2004), a first chamber (2005), a second chamber (2006), and an outlet (2007), the inlet (2004) and the outlet (2007) being formed on the tip shell (2002).

5. The high-speed disc-type shaftless motor as described in claim 4, characterized in that: The first chamber (2005) and the second chamber (2006) are integrally disposed inside the cylindrical shell (2001). The cooling medium enters from the inlet (2004) and flows out from the outlet (2007). The flow rate of the cooling medium entering the first chamber (2005) and the second chamber (2006) is controlled according to the temperature distribution of each region.

6. The high-speed disc-type shaftless motor as described in claim 5, characterized in that: A baffle plate (2008) is rotatably provided at the connection between the first chamber (2005) and the second chamber (2006). The baffle plate (2008) is a hollow cylinder cut in half. When the baffle plate (2008) rotates, it adjusts the opening of the second chamber (2006).

7. The high-speed disc-type shaftless motor as described in claim 6, characterized in that: The first chamber (2005) is also equipped with a rotating ring (2009), which is fixedly connected to the barrier plate (2008) and rotates synchronously. The first chamber (2005) is also equipped with a rotating cylinder (2012), which controls the opening of the rotating ring (2009).

8. The high-speed disc-type shaftless motor as described in claim 7, characterized in that: The rotating ring (2009) has a sliding hole (2011), and the rotating cylinder (2012) has a transmission column (2013), which is slidably disposed in the sliding hole (2011).

9. The high-speed disc-type shaftless motor as described in claim 8, characterized in that: The outer wall of the rotating cylinder (2012) is also provided with an adjusting ring (2014), the outer wall of the rotating cylinder (2012) is provided with a spiral groove (2015), the inner wall of the adjusting ring (2014) is provided with a protruding post (2016), and the protruding post (2016) is slidably disposed on the inner wall of the spiral groove (2015).

10. The high-speed disc-type shaftless motor as described in claim 9, characterized in that: The rotating cylinder (2012) has a symmetrically arranged limiting block (3001) on one end of its outer wall. The inner wall of the first chamber (2005) is also provided with a first annular groove (3002) and a second annular groove (3003). A sliding groove (3004) is provided between the first annular groove (3002) and the second annular groove (3003).

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