Nested energy-saving slotless high-speed motor

Abstract

The utility model discloses a nested energy -conserving slotless high -speed motor, including the body, the body includes the outer wall of being located the body outside, is located the installation department of outer wall inboard, set up the outer air channel between outer wall and installation department, the space of outer air channel is by the space of outer wall inner surface, connecting plate I, installation department outer surface enclose group, connecting plate I is arc plate face spiral structure and installs between installation department and outer wall, and the stator and winding are connected on installation department, and the rotor is set up in stator winding inboard, and the rotor is connected on rotating shaft one end, and the transmission part is set up on rotating shaft the other end, and the transmission part outside and installation department inboard are connected by connecting plate II, and the transmission part and installation department side wall inner surface, connecting plate II between enclose group as the inner air channel, and outer wall and installation department are connected through connecting plate I, connecting plate II, transmission part and are integrally formed with each other. Effectively promote integral rigidity and realize shock attenuation, reduce noise and failure rate, improve product connection quality stability, reduce product self weight.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a nested energy-saving slotless high-speed motor. Background Technology

[0002] Electric motors are widely used in the industrial sector as the power system for many household appliances, especially in small household appliances such as hair dryers, where the demand for miniaturized and low-noise motors is particularly evident.

[0003] In the current market, most hair dryer motors use a phased high-speed switching method, namely the traditional "pole shoe" coil structure. Multiple evenly spaced "boot"-like hooks extend from the inner ring of the stator, and the coils are wound around these hooks, forming multiple discontinuous, independent "boot" coil structures. The rotor rotates continuously through the high-speed inertia of the stator, but this does not create a continuous magnetic field, resulting in relatively low electrical power. Traditional technology places bearings at both ends of the drive shaft and connects the rotor to the middle for accelerated transmission. This increases the wheelbase between the bearings, leading to poor stability during high-speed rotation, especially when externally transmitting power to the fan blades, easily causing vibrations and generating high-speed noise. Furthermore, the discontinuous magnetic field results in interruptions in the conversion efficiency of electrical energy to kinetic energy, leading to lower conversion efficiency.

[0004] Therefore, developing a low-noise, low-vibration, high-speed, and energy-saving motor for hair dryers to improve the user experience is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a nested energy-saving slotless high-speed motor, which can effectively solve the technical problem of high noise generated by high wind speed in existing hair dryer products on the market, improve the practicality and reliability of the product, reduce noise and failure rate, improve the stability of product connection quality, and reduce the weight of the product itself.

[0006] The following technical solution is provided to solve this problem: A nested energy-saving slotless high-speed motor includes a body, which includes an outer wall on the outside of the body and a mounting part on the inner side of the outer wall. An external air duct is provided between the outer wall and the mounting part. The external air duct is composed of a space enclosed by the inner surface of the outer wall, a connecting plate I, and the outer surface of the mounting part. The connecting plate I has an arc-shaped spiral structure and is installed between the mounting part and the outer wall. A stator and a winding are connected to the mounting part. A rotor is provided inside the stator winding. The rotor is connected to one end of a rotating shaft. A transmission part is provided at the other end of the rotating shaft. The outer side of the transmission part and the inner side of the mounting part are connected by a connecting plate II. An internal air duct is formed between the inner surface of the side wall of the transmission part and the mounting part and the connecting plate II. Two bearings are provided inside the transmission part. The two bearings are arranged separately and parallel. The outer wall and the mounting part are connected to each other through the connecting plate I, the connecting plate II, and the transmission part and are integrally formed. A fan is provided on the inner side of the upper end of the outer wall. The winding is welded to the stator.

[0007] As an improvement, there are six connecting plates I and three connecting plates II, which are straight plates. Alternatively, two connecting plates can be provided as needed. The outer air duct ensures the main heat dissipation of the motor itself and serves as the main air duct cooling system. The inner air duct ensures that some airflow is dispersed to the windings for heat dissipation. Since the windings are present in the inner air duct, the airflow mostly flows around the outer air duct. Therefore, the straight plate structure of connecting plate II has less impact on airflow noise. In addition, the port of connecting plate II near the fan end has an inward bevel, which further reduces the air resistance of the end of connecting plate II to the airflow and further reduces wind noise.

[0008] As an improvement, the chamfer angle α near the fan end of the connecting plate I is 33.15 degrees. The straight end of the arc-shaped spiral connecting plate is parallel to the axis of the drive shaft, forming a spiral fan-shaped air duct structure with the inner surface of the outer wall and the outer surface of the mounting part.

[0009] As an improvement, the winding forms a continuous magnetic field generating structure, which includes a mesh-like three-phase winding to form a closed, coherent magnetic field.

[0010] As an improvement, the winding is a three-phase winding with the coils wound at a 45-degree angle, and the coils are formed into a press-laminated column structure, forming a three-dimensional stacked structure.

[0011] As an improvement, the inner air duct consists of two centrally symmetrical perforated holes, and the outer air duct consists of eight centrally symmetrically distributed perforated holes.

[0012] As an improvement, an aluminum ring is provided between the fan and the outer wall.

[0013] As an improvement, the end of the connecting plate I is located on the upper side of the lower end of the outer wall.

[0014] The beneficial effects of this utility model are as follows: The slotless air duct system heat dissipation structure and the slotless continuous magnetic field generator, especially in high-speed motor operation (up to 100,000 RPM), effectively achieve high product strength, resistance to deformation, significant weight reduction, stable connection quality, and robust reliability during use. The integrated load-bearing structure provides better product rigidity and strength, and eliminates the need for connecting components. This reduces gaps or unstable connections between components, resulting in less vibration during high-speed operation, thus achieving shock absorption and noise reduction. Furthermore, the integrated structure allows for more efficient heat transfer to the outside environment through the fasteners, further reducing heat loss. The slotless high-speed motor offers higher efficiency due to its continuous magnetic field device, effectively improving power density and motor efficiency. This results in superior motor transmission, eliminating vibration and further reducing noise during high-speed operation. The winding coils are welded after embedding. The difference between slotless high-speed motors and high-speed brushless motors lies in their winding structure and magnetic field distribution. The coil windings of high-speed brushless motors are distributed identically to those of traditional motors, with enameled wire embedded in slots within the motor core to form the stator windings. Equal physical spacing between each slot is essential. The drive current signal output by the control system, together with the permanent magnet rotor, generates a corresponding pulsating magnetic field to drive the motor. Besides low noise and smooth operation, slotless high-speed motors provide more stable torque output at low speeds. Furthermore, they have lower moment of inertia, stronger dynamic response, and faster start-stop operation. They also reduce core losses under light loads or high-speed operation, demonstrating particularly excellent energy efficiency and high power density. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the motor body structure;

[0017] Figure 2 for Figure 1 Isometric perspective stereoscopic view;

[0018] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 4 A schematic diagram of the cross-sectional hidden structure of the motor outer wall and mounting part after removing the coil and drive shaft.

[0020] Figure 5 for Figure 4 A magnified view of a section of section I;

[0021] Figure 6 for Figure 2 A schematic diagram of the structure where the fan has been removed.

[0022] Figure 7 for Figure 6 A structural diagram from another perspective.

[0023] The technical feature names corresponding to the reference numerals in the attached drawings are as follows: 1. Outer wall; 2. Mounting part; 3. External air duct; 4. Connecting plate I; 5. Stator; 6. Winding; 7. Rotor; 8. Rotating shaft; 9. Transmission part; 10. Connecting plate II; 11. Internal air duct; 12. Bearing; 13. Fan; 14. Aluminum ring. Detailed Implementation

[0024] like Figure 1-5 As shown, a nested energy-saving slotless high-speed motor includes a body. The body includes an outer wall 1 located on the outside of the body and a mounting part 2 located on the inner side of the outer wall. An external air duct 3 is provided between the outer wall and the mounting part. The external air duct is composed of a space enclosed by the inner surface of the outer wall, a connecting plate I 4, and the outer surface of the mounting part. The connecting plate I has an arc-shaped spiral structure and is installed between the mounting part and the outer wall. A stator 5 and a winding 6 are connected to the mounting part. A rotor 7 is provided inside the stator winding. The rotor is connected to one end of a rotating shaft 8. A transmission part 9 is provided at the other end of the rotating shaft. The outer side of the transmission part and the inner side of the mounting part are connected by a connecting plate II 10. The transmission part 9 and... The inner surface of the upper side wall of the mounting part 2 and the connecting plate II 10 form an inner air duct 11. The inner air duct extends downward to the upper end of the stator 5 and the winding 6. The upper end of the inner air duct is separated and diverted by the connecting plate II. The lower end of the inner air duct is provided with an open cavity without division, allowing the airflow to fully contact and penetrate the gaps on the stator and winding and flow out from the lower end of the stator and winding, completing heat exchange and removing heat to achieve cooling. Two bearings 12 are provided on the inner side of the transmission part. The two bearings are set separately and parallel. The outer wall and the mounting part are connected to each other through the connecting plate I, the connecting plate II and the transmission part and are integrally formed. A fan 13 is provided on the inner side of the upper end of the outer wall. The winding is welded to the stator.

[0025] This technical solution eliminates the commonly used slotted coil structure in the winding and stator welding, forming a slotless continuous magnetic field generator. The slotless air duct system and the slotless continuous magnetic field generator, especially effective in high-speed motor operation (up to 100,000 RPM), significantly improve product strength, reduce deformation, reduce overall weight, and ensure stable and reliable connections. The continuous magnetic field device effectively increases power density and motor efficiency. The integrated load-bearing structure provides better rigidity and eliminates the need for connecting components, reducing gaps or unstable connections and vibrations during high-speed operation, thus reducing vibration and noise. The integrated structure also allows for more efficient heat transfer to the outside environment, resulting in better cooling. The motor transmission is smooth and vibration-free, further reducing noise at high speeds. Compared to the commonly used slotted coil windings that work with the core, the slotless structure is simpler and offers a more sophisticated installation process. The traditional slotted winding structure, with its high-speed rotating magnetic field, creates a slotting effect, generating noise and vibration. This fails to meet the quiet operation requirements of high-speed motors and negatively impacts their efficiency and lifespan. The slotless coil winding, compared to slotted motors and existing staged magnetoelectric power conversion mechanisms, achieves a continuous magnetic field that significantly improves the conversion efficiency from electrical to kinetic energy, increasing energy utilization by more than five times and achieving effective energy saving. The mounting section features a connecting shaft with parallel double bearings, creating a bearing balance mechanism. The space between the two bearings supports the drive shaft, and the two separate connection points promote linear transmission. Furthermore, compared to the conventional arrangement of bearings at both ends of the stator winding, this reduces the distance between bearings, minimizing internal space and further reducing the motor's size under the same conditions. This increases the possibility of miniaturization. The reduced distance between the two bearings prevents them from touching, and the dual-bearing structure on the same side simultaneously reduces transmission sway, improving transmission stability.

[0026] In this embodiment, there are six connecting plates I, and three or two connecting plates II are straight plates. The outer air duct ensures the main heat dissipation of the motor itself and is the main air duct heat dissipation system. The inner air duct ensures that part of the airflow is dispersed to the winding part to achieve heat dissipation. Since there is a winding in the inner air duct, the airflow mostly flows around the outer air duct. Therefore, the straight plate structure of the connecting plate II has little impact on airflow noise. In addition, the port position of the connecting plate II near the fan end is provided with an inward oblique cut, which further reduces the wind resistance of the connecting plate II end to the airflow and further reduces wind noise.

[0027] The connecting plate I has a chamfer angle α of 33.15 degrees near the fan end. The straight end of the arc-shaped spiral connecting plate is parallel to the axis of the drive shaft, forming a spiral fan-shaped air duct structure with the inner surface of the outer wall and the outer surface of the mounting part. The spiral annular air duct increases the duration of airflow and the contact area between the circulating air and the generator surface, thereby increasing the efficiency of heat exchange, achieving rapid heat dissipation and cooling of the motor, ensuring stable and efficient operation of the motor for a long time, and effectively improving its service life.

[0028] The fan draws in air from the outside through the rotation of the fan blades and propels it forward. During this propulsion process, the airflow follows a spiral shape as the fan rotates and draws in the air. The incoming airflow smoothly enters the spiral-shaped external air duct, which then flows directly outward from the outlet. This process effectively avoids the spiral-shaped airflow from the fan directly impacting the external air duct and causing noise. Instead, it uses a rotating arc-shaped channel to gradually achieve a smooth and corrective buffering process, avoiding noise and direct impact. This smooth flow effectively continues the high-speed flow of the incoming airflow, ensuring rapid heat exchange and continuous high-speed circulation of the air around the outer wall, inner mounting part, connecting plate, and motor, resulting in excellent cooling performance.

[0029] The windings form a continuous magnetic field generating structure, which includes a mesh-like three-phase winding to form a closed, coherent magnetic field. Traditional high-speed brushless motors are constrained by their own coil winding structure and the principle of non-coherent pulsating magnetic fields, causing inherent cogging effects during operation. Severe cogging effects can be converted into electromagnetic noise, a persistent and difficult problem in the industry that significantly impacts the overall performance of the motor. This technical solution, with its slotless high-speed motor design, innovates and optimizes the motor structure, completely avoiding the cogging effect and solving a pressing technical problem in the traditional motor industry.

[0030] The three-phase windings are wound at a 45-degree angle, with the coils forming a compressed cylindrical structure, creating a three-dimensional laminated structure. This results in stable and robust connections, and the three-dimensional laminated windings are, to some extent, more conducive to heat dissipation compared to flat windings.

[0031] The inner air duct consists of two centrally symmetrical perforated holes, while the outer air duct consists of eight centrally symmetrically distributed perforated holes. The symmetrically arranged heat dissipation air ducts ensure smoother and more uniform airflow, achieving uniform heat dissipation over the entire area of ​​the coil and iron core, thus enhancing overall stability and extending service life.

[0032] An aluminum ring 14 is provided between the fan and the outer wall. The aluminum material is light and relatively soft, and the addition of a shock-absorbing pad makes it particularly effective in resisting shock and protecting the stability of the product connection.

[0033] The end of the connecting plate I is located on the upper side of the lower end of the outer wall. The end of the connecting plate I, which is also the end of the external air duct, is actually located on the inner side of the outer wall. This allows the airflow direction to be corrected before the air flows out from the end of the outer wall. The end leaves a gap, so the airflow is not restricted by the air duct, resulting in higher outflow efficiency and further improving heat dissipation efficiency.

[0034] Efficiency and energy saving are core indicators for evaluating the performance of motors. The slotless high-speed motor employs an innovative, self-contained coil winding design, eliminating eddy current and hysteresis losses commonly found in traditional motors. This significantly improves energy conversion efficiency, especially under low load or frequent start-stop scenarios where energy saving is even more pronounced. Under the same load conditions, the slotless high-speed motor achieves approximately 30% better energy savings than a high-speed brushless motor.

[0035] The slotless high-speed motor boldly adopts a slotless design, innovating and optimizing the key structure of the motor. It completely avoids the cogging effect from the design source, solving a key problem in the traditional motor industry.

[0036] The source of noise and vibration generated by high-speed brushless motors, besides the mechanical structure design, depends to a greater extent on the electromagnetic noise and vibration caused by the cogging effect during motor operation.

[0037] The slotless high-speed motor innovates the key architecture of the coil winding, combined with a series of measures such as high-precision magnetic field commutation and optimized rotor dynamic balance. Simultaneously, advanced software drive algorithms reduce torque ripple, improve drive smoothness, and completely eliminate cogging effect and vibration. Actual measurements show that the noise level of a single motor is below 40dB, unmatched by traditional motors.

[0038] The slotless high-speed motor's stator winding employs a specific structure, enabling the motor to generate very low eddy currents and iron losses during operation, resulting in excellent overall temperature rise performance. Actual measurements show that, under the same operating conditions, the surface temperature of the slotless high-speed motor's coil windings remains below 60 degrees Celsius after long-term operation, while the surface temperature of the windings in a traditional brushless high-speed motor exceeds 80 degrees Celsius.

[0039] The slotless high-speed motor adopts advanced vector control technology and software algorithms, and the torque response time can reach the millisecond level. It supports a wide range of operation from zero speed to ultra-high speed. By optimizing the magnetic field and torque components, copper loss and iron loss are greatly reduced, and torque ripple and noise are suppressed to the maximum extent. The future trend of vector control can perfectly realize AI interface and learning, and use neural networks to optimize control parameters or achieve model-free control.

[0040] The iron core is a critical component that accounts for a significant portion of the motor's weight. The iron core volume of a slotless high-speed motor is only one-third that of a high-speed brushless motor, and the diameter of the coil windings is not affected by the space of the winding slots. This allows for greater torque output with a smaller motor size, significantly improving the overall power density, achieving a lightweight design, and reducing product costs.

[0041] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the protection scope of this utility model.

Claims

1. A nested energy-saving slotless high-speed motor, comprising a body, characterized in that: The main body includes an outer wall (1) located on the outside of the main body and a mounting part (2) located on the inner side of the outer wall. An external air duct (3) is provided between the outer wall and the mounting part. The external air duct is composed of a space enclosed by the inner surface of the outer wall, a connecting plate I (4), and the outer surface of the mounting part. The connecting plate I has an arc-shaped spiral structure and is installed between the mounting part and the outer wall. A stator (5) and a winding (6) are connected to the mounting part. A rotor (7) is provided inside the stator winding. The rotor is connected to one end of a rotating shaft (8) and rotates. A transmission part (9) is provided at the other end of the shaft. The outer side of the transmission part and the inner side of the mounting part are connected by a connecting plate II (10). The inner surface of the side wall of the transmission part (9) and the mounting part (2) and the connecting plate II (10) form an inner air duct (11). Two bearings (12) are provided on the inner side of the transmission part. The two bearings are set separately and in parallel. The outer wall and the mounting part are connected to each other by the connecting plate I, the connecting plate II and the transmission part and are integrally formed. A fan (13) is provided on the inner side of the upper end of the outer wall. The winding is welded to the stator.

2. The nested energy-saving slotless high-speed motor according to claim 1, characterized in that: There are six connecting plates I, and three connecting plates II are straight plates.

3. A nested energy-saving slotless high-speed motor according to claim 1 or 2, characterized in that: The connecting plate I has a chamfer angle α of 33.15 degrees near the fan end. The straight end of the arc-shaped spiral connecting plate is parallel to the axis of the drive shaft, forming a spiral fan-shaped air duct structure with the inner surface of the outer wall and the outer surface of the mounting part.

4. The nested energy-saving slotless high-speed motor according to claim 1, characterized in that: The windings form a continuous magnetic field generating structure, which includes a mesh-like three-phase winding to form a closed, coherent magnetic field.

5. A nested energy-saving slotless high-speed motor according to claim 1 or 4, characterized in that: The winding is a three-phase winding with the coils wound at a 45-degree angle. The coils are formed into a press-column structure, creating a three-dimensional stacked structure.

6. A nested energy-saving slotless high-speed motor according to claim 1, characterized in that: The inner air duct consists of two centrally symmetrical perforated holes, and the outer air duct consists of eight centrally symmetrically distributed perforated holes.

7. A nested energy-saving slotless high-speed motor according to claim 1, characterized in that: An aluminum ring (14) is provided between the fan and the outer wall.

8. A nested energy-saving slotless high-speed motor according to claim 3, characterized in that: The end of the connecting plate I is located on the upper side of the lower end of the outer wall.

Images