Dual supply mode electromagnetic structure and dual supply brushless motor comprising same

Abstract

The utility model discloses electromagnetic structure of double power supply mode, including stator subassembly and rotor subassembly, and stator subassembly includes stator core and stator winding, and rotor subassembly includes magnetic ring, and stator winding includes the direct current winding for connecting direct current source and the alternating current winding for connecting alternating current source, direct current winding includes 3N direct current coil units and they are uniformly arranged on stator core in the circumference, and 3N direct current coil units adopt star connection or delta connection to connect direct current source, and alternating current winding has 3N alternating current coil units and they are uniformly arranged on stator core in the circumference, and 3N alternating current coil units adopt star connection or delta connection to connect alternating current source. The utility model can improve the use flexibility significantly, and user can choose direct current power supply or alternating current power supply freely according to actual scene, satisfies the use demand under different environment, whether it is outdoor operation or indoor long time use, and equipment can stable operation.

Description

Technical Field

[0001] This utility model belongs to the field of motors, and more specifically, relates to an electromagnetic structure with dual power supply mode and a dual power supply brushless motor including the same. Background Technology

[0002] In modern electric equipment applications, users are increasingly demanding higher performance, portability, and ease of use. Taking high-speed fans, hair dryers, and power tools as examples, battery-powered portability is crucial in outdoor or mobile scenarios; while AC mains power ensures continuous and stable operation during extended indoor use. However, existing electric equipment generally suffers from a single power supply mode or an imperfect switching mechanism. When relying solely on battery power, battery life is limited, and frequent charging is inconvenient for users; if only AC mains power is supported, the usage scenarios for the equipment are severely restricted.

[0003] From the design perspective of motors and drive systems, traditional solutions have many shortcomings. On the one hand, the motor windings and drive methods under different power supply modes fail to achieve efficient coordination, resulting in poor overall motor performance and low energy conversion efficiency. For example, when switching power supply modes, problems such as difficulty in starting the motor and unstable speed often occur. On the other hand, the drive system is complex and expensive, which not only increases the production cost of the product but also makes the product less competitive in the market.

[0004] Furthermore, the design and assembly process of rotor magnets in traditional motors have flaws that limit further improvements in motor performance. For example, traditional magnetic rings, which are made of tile-like magnets spliced ​​together, have uneven magnetic field distribution, resulting in significant vibration and noise during motor operation, thus affecting the user experience. Summary of the Invention

[0005] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides an electromagnetic structure with dual power supply mode and a dual power supply brushless motor including the structure, which can flexibly switch power supply modes, operate efficiently and stably, and has controllable cost.

[0006] To achieve the above objectives, according to this utility model, an electromagnetic structure with dual power supply modes is provided, including a stator assembly and a rotor assembly. The stator assembly includes a stator core and stator windings mounted on the stator core. The rotor assembly includes a magnetic ring and a rotating shaft. The stator windings are arranged around the magnetic ring, and the magnetic ring is fixedly mounted on the rotating shaft. Furthermore, the magnetic ring is an oriented magnetic ring. The present invention is characterized in that...

[0007] The stator winding includes a DC winding for connecting to a DC power source and an AC winding for connecting to an AC power source.

[0008] The DC winding includes 3N DC coil units, which are circumferentially evenly arranged on the stator core. These 3N DC coil units are connected to the DC power supply in a star or delta configuration.

[0009] The AC winding has 3N AC coil units and they are evenly arranged circumferentially on the stator core. These 3N AC coil units are connected to the AC power supply in a star or delta configuration.

[0010] Where N is a positive integer.

[0011] Preferably, the stator core is a toothed stator core;

[0012] The stator core has 6N teeth that are evenly arranged circumferentially, and the 6N teeth include 3N DC coil unit mounting teeth and 3N AC coil unit mounting teeth.

[0013] Each of the aforementioned DC coil units is respectively mounted on a DC coil unit mounting tooth of a stator core;

[0014] Each of the AC coil units is respectively mounted on an AC coil unit mounting tooth of the stator core;

[0015] The 3N DC coil units and the 3N AC coil units are arranged alternately in a circumferential direction.

[0016] Preferably, the wire diameter of each of the DC coil units is D. 直 And the number of turns are M respectively 直 The wire diameter of each of the AC coil units is D. 交 And the number of turns are M respectively 交 D 直 ≥1.5mm², D 交 ≤0.5mm², M 交 ≥2M 直 .

[0017] Preferably, N=1, and the magnetic ring is a quadrupole oriented magnetic ring.

[0018] Preferably, the stator core is a slotless stator core, the stator winding is a modular spool, and 3N DC coil units and 3N AC coil units are arranged alternately in the circumferential direction.

[0019] Preferably, the stator core is a slotless stator core, the DC winding of the stator winding is a hollow cup coil, the AC winding of the stator winding is a hollow cup coil, the DC winding and the AC winding are connected together, and:

[0020] The DC winding is formed by winding multiple coaxially stacked and fixed first rhombic coils around a drum. The stacked first rhombic coils are divided into 3N groups along the center line of the first rhombic coils. Each group of first rhombic coils contains P first rhombic coils. Each group of first rhombic coils forms a DC coil unit after winding, where P is a positive integer greater than 1.

[0021] The AC winding is formed by winding multiple coaxially stacked and fixed second rhombus coils around a drum. These stacked second rhombus coils are divided into 3N groups along the center line of the second rhombus coils. Each group of second rhombus coils contains Q second rhombus coils. Each group of second rhombus coils forms an AC coil unit after winding, where Q is a positive integer greater than 1.

[0022] Preferably, the DC winding is powered by a DC power supply of 3.7V-48V, and the AC winding is powered by an AC power supply of 100V-240V.

[0023] Preferably, the magnetic ring is a seamless, integral magnetic ring.

[0024] Preferably, the power supply mode is selected between DC and AC via a gear switch.

[0025] According to another aspect of this utility model, a dual-powered brushless motor is also provided, characterized in that it includes the electromagnetic structure of the dual-powered mode.

[0026] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0027] 1) The dual power supply mode electromagnetic structure of this utility model allows users to freely choose between DC power supply or AC power supply according to the actual scenario, meeting the usage needs in different environments. Whether it is outdoor operation or long-term indoor use, the equipment can operate stably, significantly improving the flexibility of use.

[0028] 2) The electromagnetic structure of this utility model with dual power supply mode adopts optimized stator winding design, drive system architecture and innovative magnetic ring application, which improves the efficiency and performance of the motor in different power supply modes, reduces energy consumption, extends battery life and equipment continuous working time, and improves motor efficiency and performance.

[0029] 3) The dual-power supply mode electromagnetic structure, integrated drive system design and integrated directional charging magnetic ring of this utility model reduce the number of components and system complexity, reduce production difficulty and cost, improve product market competitiveness and reduce production costs.

[0030] 4) The electromagnetic structure of the dual power supply mode of this utility model adopts the innovative magnetic ring technology of directional orientation, which improves the electromagnetic performance of the motor, optimizes the magnetic field distribution, reduces the cogging torque fluctuation, enhances the magnetic field strength, improves the efficiency and stability of the brushless motor, simplifies the assembly process, improves production efficiency, and realizes the miniaturization and lightweighting of the brushless motor. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the stator core of this utility model when it has six teeth;

[0032] Figure 2 The magnetic field distribution diagram of the stator core of this utility model has toothed grooves, N=1 and the magnetic ring is a four-pole oriented magnetic ring;

[0033] Figure 3 This is an overall schematic diagram of the stator winding of this utility model when it is a modular spool and N=1;

[0034] Figure 4 This is an exploded view of the stator winding of this utility model when it is a modular spool and N=1;

[0035] Figure 5 This is a schematic diagram of multiple diamond-shaped coils stacked together for preparing DC or AC windings according to the present invention.

[0036] Figure 6 for Figure 5 A front view of a hollow cup coil formed by winding multiple rhomboid coils around a spool;

[0037] Figure 7 for Figure 5 A three-dimensional diagram of a hollow cup coil formed by winding multiple rhomboid coils around a spool;

[0038] Figure 8 This is a schematic diagram of the stator winding of this utility model when hollow cup coils are nested together;

[0039] Figure 9 This is a schematic diagram of the magnetic ring in this utility model. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] Reference Figures 1-9 The electromagnetic structure with dual power supply mode includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a stator core 11 and a stator winding 12 mounted on the stator core 11. The rotor assembly 2 includes a magnetic ring 21 and a rotating shaft 22. The stator winding 12 is arranged around the magnetic ring 21 (corresponding to an inner rotor motor), that is, the stator winding 12 surrounds the magnetic ring 21. The magnetic ring 21 is fixedly mounted on the rotating shaft 22, and the magnetic ring 21 is a directional magnetic ring, which is magnetized using directional magnetization technology. The stator winding 12 can adopt a conventional concentrated winding, distributed winding, modular spool, or hollow spool coil structure.

[0042] The stator winding 12 includes a DC winding 12-1 for connecting to a DC power supply and an AC winding for connecting to an AC power supply.

[0043] The DC winding 12-1 includes 3N DC coil units 121, which are circumferentially and uniformly arranged on the stator core 11. These 3N DC coil units 121 are connected to a DC power supply in a star or delta configuration, and are powered by the DC power supply.

[0044] The AC winding 12-2 has 3N AC coil units 122, which are evenly arranged circumferentially on the stator core 11. These 3N AC coil units 122 are connected to the AC power supply in a star or delta configuration. These AC coil units 122 are powered by the AC power supply.

[0045] Where N is a positive integer.

[0046] Star or delta connection is the conventional connection method for the stator winding 12 of the motor, which will not be elaborated here. The specific connection method used depends on the voltage and application.

[0047] Users can freely choose between DC or AC power supply according to the actual scenario to meet the usage needs in different environments. Whether it is outdoor operation or long-term indoor use, the equipment can operate stably, significantly improving the flexibility of use.

[0048] Since the DC winding 12-1 and the AC winding 12-2 do not work at the same time, it means that half of the stator winding 12 is not energized and heated. The heat density of the stator winding 12 when it is working can reach a higher level, and the excess heat can be quickly transferred and dispersed, thereby maximizing the power density of the brushless motor of this invention.

[0049] The stator winding of this invention is located on the periphery of the magnetic ring, making it an internal rotor motor. Therefore, it can employ external magnetic field directional magnetization technology, which can achieve saturated magnetization under a small outer diameter of the magnetic ring. This allows the brushless motor of this solution to have power output close to or even exceeding that of traditional motors.

[0050] Conventionally used magnetic rings include oriented magnetic rings and radially oriented magnetic rings. When manufacturing small-sized magnetic rings, oriented magnetic rings exhibit less magnetic property attenuation, while the orientation and performance of radially oriented magnetic rings decrease significantly as the diameter decreases. Therefore, the magnetic ring 2 of this invention adopts an oriented magnetic ring, which is particularly suitable for the electromagnetic structure under the dual power supply mode of this invention.

[0051] The advantages of oriented magnetic rings are as follows:

[0052] Application of Oriented Magnetic Rings: Magnetic ring 21 is preferably made of sintered NdFeB oriented magnetic ring. During the fabrication of this magnetic ring 21, external or internal magnetic pulsed magnetic field orientation is used depending on the size and wall thickness of the magnetic ring 21. Miniature magnetic rings 21 with an outer diameter of less than 5mm are first pressed into solid cylinders and then the inner hole is machined; those with an outer diameter of 10mm or more are directly pressed into rings; those with an inner diameter of 25mm or more are oriented using internal magnetic field. By adjusting the intensity of the pulsed magnetic field, magnetic circuit closure can be achieved, allowing the production of magnetic rings 21 that meet different requirements.

[0053] Magnetic Field Optimization and Performance Enhancement: The oriented magnetic ring achieves maximum surface field strength within a limited space, resulting in a uniform and stable magnetic field distribution in the brushless motor. Working in conjunction with the dual-winding layout, in battery-powered mode, the strong magnetic field of the magnetic ring, combined with the low-voltage winding, improves motor efficiency and extends battery life; in AC-powered mode, it enhances motor efficiency and stability. Simultaneously, it effectively reduces cogging torque ripple, decreases motor vibration and noise, and improves overall motor stability and lifespan. Experimental verification shows that compared to traditional motors, the motor using the oriented magnetic ring of this invention exhibits significantly improved efficiency and significantly reduced speed fluctuations.

[0054] Improved production efficiency and reduced costs: The integrated design of the directional magnetic ring reduces motor assembly steps and the number of parts, lowering production difficulty and costs. During production, appropriate parameters for the magnetic ring 21 can be selected based on motor characteristics, improving production efficiency and product consistency, reducing scrap rates, and enhancing product market competitiveness.

[0055] Achieving miniaturization and lightweight design: The compact structure of the directional magnetic ring provides a powerful magnetic field output within a limited space, which helps to miniaturize and lighten the design of motors, meeting the needs of equipment with strict space and weight requirements, such as cooling fans and portable power tools.

[0056] Furthermore, the DC winding 12-1 is powered by a 3.7V-48V DC power supply, and the AC winding 12-2 is powered by a 100V-240V AC power supply. The DC power supply can be a rechargeable battery, thus enabling the motor to operate on both low-voltage DC (powered by a battery, preferably a rechargeable battery that can be charged via a TUPE-C port) and a wide range of AC mains voltages (AC100V~240V).

[0057] Furthermore, the magnetic ring 21 of this invention is a seamless, integral magnetic ring (unlike magnetic rings made by splicing multiple tile-shaped magnets together). The rotor of the brushless motor uses an integral magnetic ring, which, compared to the previous method of splicing tile-shaped magnets, simplifies installation, streamlines the process, and improves overall efficiency.

[0058] Furthermore, the power supply mode can be selected between DC and AC via a gear switch. The gear switch has three positions: off, AC power, and battery power. The two power sources are independent and do not conduct, avoiding interference between different voltages.

[0059] Furthermore, refer to Figure 1 , Figure 2 As a preferred embodiment of this utility model, the stator core 11 is a toothed stator core 11.

[0060] The stator core 11 has 6N teeth that are evenly arranged circumferentially, and the 6N teeth include 3N DC coil unit mounting teeth and 3N AC coil unit mounting teeth.

[0061] Each of the DC coil units 121 is respectively mounted on a DC coil unit mounting tooth of the stator core 11.

[0062] Each of the AC coil units 122 is respectively mounted on an AC coil unit mounting tooth of the stator core 11.

[0063] The 3N DC coil units 121 and the 3N AC coil units 122 are arranged alternately in a circumferential manner. The 3N DC coil units 121 are individually connected to a DC power supply, and the 3N AC coil units 122 are individually connected to an AC power supply. The two do not affect each other.

[0064] The stator winding on the toothed stator core 11 of this invention has the same winding method as the stator winding on a conventional toothed stator core. Each DC coil unit 121 and each AC coil unit 122 is a conventional coil wound on the toothed portion.

[0065] Furthermore, the wire diameter of each DC coil unit 121 is D_direct and the number of turns is M_direct, and the wire diameter of each AC coil unit 122 is D_interactive and the number of turns is M_interactive, where D_direct ≥ 1.5 mm², D_interactive ≤ 0.5 mm², and M_interactive ≥ 2M_direct.

[0066] Furthermore, N=1, the magnetic ring 21 is a four-pole oriented magnetic ring, and the number of magnetic poles of the magnetic ring 21 is an even number such as 2, 4, 6, etc. According to the principle of motor, a reasonable slot pole ratio is selected, which will not be elaborated here.

[0067] When N=1, the parameters of stator winding 12 are designed as follows:

[0068] DC winding (also known as low-voltage winding): The DC winding has three DC coil units 121, which are located in the first tooth 111, the third tooth 113, and the fifth tooth 115 of the stator core 11. They are connected to the DC power supply in a star (Y) or delta configuration to reduce phase voltage and are suitable for 3.7V-48V battery power. The wire diameter is thick, such as 1.5mm², to support high current.

[0069] AC winding 12-2 (also known as high-voltage winding): AC winding 12-2 has three AC coil units 122, which are located in the second tooth section 112, the fourth tooth section 114, and the sixth tooth section 116 of the stator core 11. They are connected to the AC power supply using a delta (Δ) or star connection, adaptable to 100V-240V AC power. Fine wire diameter, such as 0.5mm², is used, with twice the number of turns as the high-voltage winding, to increase impedance and reduce the current demand of the AC driver.

[0070] See Figure 1 This invention employs a unique winding layout. The brushless motor uses a six-slot (tooth) design, constructing two independent windings. The first tooth section 111, the third tooth section 113, and the fifth tooth section 115 house DC coil units 121, compatible with 7.4V–36V DC battery power supply. Utilizing a low-voltage, high-speed winding process, it ensures high-speed operation of the motor under low voltage conditions. The second tooth section 112, the fourth tooth section 114, and the sixth tooth section 116 house AC coil units 122, suitable for 100V–240V AC mains power supply. Through reasonable planning of winding parameters, it ensures stable operation of the motor under mains voltage.

[0071] The pole-slot matching reconstruction is as follows: a four-pole directional magnetic ring is used to match the 6-slot (tooth) structure of the stator core 11, which reduces the tooth and slot torque fluctuation and enhances the spatial harmonic density of the magnetic field.

[0072] The toothed stator core 11 of this invention preferably employs six teeth, each with a corresponding number of turns wound on it. Specifically, the first tooth 111, the third tooth 113, and the fifth tooth 115 are wound with a DC coil unit 121, which has a thicker wire diameter and fewer turns. The second tooth 112, the fourth tooth 114, and the sixth tooth 116 are wound with an AC coil unit 122, which has a thinner wire diameter and more turns. The two sets of coils are independent and both are three-phase windings, connected in either a Y-type or delta-type configuration as needed (preferably Y-type, with no significant difference in advantage between the two). Furthermore, the stator coils are evenly distributed within the circumference of each set to ensure a consistent spatial phase difference between the three-phase windings (typically 12-1°). This principle is consistent with that of a traditional single stator winding 12, thereby ensuring balance among the three-phase windings and balanced motor operation.

[0073] Furthermore, refer to Figure 3 , Figure 4 As another preferred embodiment of this utility model, the stator core 11 is a slotless stator core 11, the stator winding 12 is a modular spool, and 3N DC coil units 121 and 3N AC coil units 122 are arranged alternately in the circumference. For the shape and preparation of the modular spool, please refer to the patent with publication number CN117182454A entitled "An Automatic Production Line for Hollow Cup Forming".

[0074] When preparing the modular spool, each rhomboid coil group is wound separately to make 6 independent rhomboid coils that are staggered from each other. The modular spool is then shaped into a cylindrical shape using tooling equipment. This is the winding of the hollow brushless motor (also known as a slotless brushless motor) that is well-known in the industry. The structure of the magnetic ring 21 is exactly the same, so it will not be described in detail here.

[0075] Six independent rhomboid coils are arranged in a row and formed into cup-shaped windings of the required size using tools such as rounding and straightening. The ends of the first, third, and fifth coils (which are all DC coil units) are connected to form a Y-type (or Δ-type) DC winding 12-1. The ends of the second, fourth, and sixth coils (which are all AC coil units) are connected to form a Y-type (or Δ-type) AC winding 12-2. The two sets of coils are independent of each other to meet the requirements of high-voltage and low-voltage switching in the application. Each DC coil unit of the modular coil spool is formed by one rhomboid coil, and each AC coil unit is also formed by one rhomboid coil.

[0076] Furthermore, refer to Figures 5-8As another preferred embodiment of this utility model, the stator core 11 is a slotless stator core 11, the DC winding 12-1 of the stator winding 12 is a hollow cup coil, the AC winding 12-2 of the stator winding 12 is a hollow cup coil, the DC winding 12-1 and the AC coil unit 122 are connected together (either the DC winding 12-1 is inside and the AC winding 12-2 is outside, or the DC winding 12-1 is outside and the AC winding 12-2 is inside), and:

[0077] The DC winding 12-1 is manufactured using a winding process. The DC winding 12-1 is formed by winding multiple coaxially stacked and fixed first rhombic coils onto a winding drum. These stacked first rhombic coils are divided into 3N groups of first rhombic coil groups 1201 along the direction of the center line of the first rhombic coils. Each group of first rhombic coil groups 1201 has P first rhombic coils. Each group of first rhombic coil groups 1201 forms a DC coil unit 121 after winding, where P is a positive integer greater than 1.

[0078] The AC winding 12-2 is manufactured using a winding production process and a one-time molding production technology. The AC winding 12-2 is formed by winding multiple coaxially stacked and fixed second rhombic coils onto a winding drum. These stacked second rhombic coils are divided into 3N groups along the center line of the second rhombic coils. Each group of second rhombic coils has Q second rhombic coils. Each group of second rhombic coils forms an AC coil unit after winding, thus forming a total of 3N AC coil units 121. The 3N AC coil units 121 can then be distinguished and wired according to the three phases UVW, where Q is a positive integer greater than 1.

[0079] The number of magnetic poles of magnetic ring 21 is adjusted and adapted according to the value of N.

[0080] By adopting a winding production process and a one-time molding production technology, the DC winding 12-1 or AC winding 12-2 can be wound in one go. Based on this process, two types of hollow cup combination windings with inner and outer sets can be made. The inner cup is the DC winding 12-1 (or AC winding 12-2), and the outer cup is the AC winding 12-2 (or DC winding 12-1), thus realizing the production of combination windings that can switch between high voltage and low voltage.

[0081] When manufacturing modular spools, the rhomboid coils need to be staggered before being shaped (rounded and aligned) into a circle. However, in the production process of hollow spool coils, the rhomboid coils are not staggered before winding and are flattened when wound on the spool.

[0082] According to another aspect of this utility model, a dual-powered brushless motor is also provided, including the electromagnetic structure of the dual-powered mode.

[0083] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic structure with dual power supply mode, comprising a stator assembly and a rotor assembly, the stator assembly comprising a stator core and stator windings mounted on the stator core, the rotor assembly comprising a magnetic ring and a shaft, the stator windings being arranged around the magnetic ring, the magnetic ring being fixedly mounted on the shaft, and the magnetic ring being an oriented magnetic ring, characterized in that, The stator winding includes a DC winding for connecting to a DC power source and an AC winding for connecting to an AC power source. The DC winding includes 3N DC coil units, which are circumferentially evenly arranged on the stator core. These 3N DC coil units are connected to the DC power supply in a star or delta configuration. The AC winding has 3N AC coil units and they are evenly arranged circumferentially on the stator core. These 3N AC coil units are connected to the AC power supply in a star or delta configuration. Where N is a positive integer.

2. The electromagnetic structure with dual power supply mode according to claim 1, characterized in that, The stator core is a toothed stator core; The stator core has 6N teeth that are evenly arranged circumferentially, and the 6N teeth include 3N DC coil unit mounting teeth and 3N AC coil unit mounting teeth. Each of the aforementioned DC coil units is respectively mounted on a DC coil unit mounting tooth of a stator core; Each of the AC coil units is respectively mounted on an AC coil unit mounting tooth of the stator core; The 3N DC coil units and the 3N AC coil units are arranged alternately in a circumferential direction.

3. The electromagnetic structure with dual power supply mode according to claim 2, characterized in that, The wire diameter of each of the DC coil units is D. 直 And the number of turns are M respectively 直 The wire diameter of each of the AC coil units is D. 交 And the number of turns are M respectively 交 D 直 ≥1.5mm², D 交 ≤0.5mm², M 交 ≥2M 直 .

4. The dual power mode electromagnetic structure of claim 2, wherein, N=1, and the magnetic ring is a quadrupole oriented magnetic ring.

5. The dual power mode electromagnetic structure of claim 1, wherein, The stator core is a slotless stator core, the stator winding is a modular spool, and 3N DC coil units and 3N AC coil units are arranged alternately in the circumferential direction.

6. The dual power mode electromagnetic structure of claim 1, wherein, The stator core is a slotless stator core, the DC winding of the stator winding is a hollow cup coil, the AC winding of the stator winding is a hollow cup coil, the DC winding and the AC winding unit wires are connected together, and: The DC winding is formed by winding multiple coaxially stacked and fixed first rhombic coils around a drum. The stacked first rhombic coils are divided into 3N groups along the center line of the first rhombic coils. Each group of first rhombic coils contains P first rhombic coils. Each group of first rhombic coils forms a DC coil unit after winding, where P is a positive integer greater than 1. The AC winding is formed by winding multiple coaxially stacked and fixed second rhombus coils around a drum. These stacked second rhombus coils are divided into 3N groups along the center line of the second rhombus coils. Each group of second rhombus coils contains Q second rhombus coils. Each group of second rhombus coils forms an AC coil unit after winding, where Q is a positive integer greater than 1.

7. The electromagnetic structure with dual power supply mode according to claim 1, characterized in that, The DC winding is powered by a DC power supply of 3.7V-48V, and the AC winding is powered by an AC power supply of 100V-240V.

8. The electromagnetic structure with dual power supply mode according to claim 1, characterized in that, The magnetic ring is a seamless, integral magnetic ring.

9. The electromagnetic structure with dual power supply mode according to claim 1, characterized in that, The DC or AC power supply mode can be selected via a range switch.

10. A dual-powered brushless motor, characterized in that, The electromagnetic structure includes the dual power supply mode as described in any one of claims 1 to 9.

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