Electromagnetic structure with double power supply modes and double power supply brushless motor comprising same

Abstract

The invention discloses a dual-power-supply-mode electromagnetic structure which comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator iron core and a stator winding, the rotor assembly comprises a magnetic ring, and the stator winding comprises a direct-current winding used for being connected with a direct-current power source and an alternating-current winding used for being connected with an alternating-current power source; the direct current winding comprises 3N direct current coil units which are uniformly arranged on the stator core in the circumferential direction; the 3N direct current coil units are connected with a direct current power supply by adopting a star connection method or a delta connection method; the alternating current winding is provided with 3N alternating current coil units which are circumferentially and uniformly arranged on the stator core; and the 3N alternating current coil units are connected with an alternating current power supply by adopting a star connection method or a delta connection method. The use flexibility can be remarkably improved, a user can freely select direct-current power supply or alternating-current power supply according to actual scenes, the use requirements in different environments are met, and equipment can stably operate no matter outdoor operation or indoor long-time use.

Description

Technical Field

[0001] The present invention belongs to the field of motors, and more specifically, relates to an electromagnetic structure with a dual-power supply mode and a dual-power supply brushless motor including the same. Background Art

[0002] In modern applications of electric devices, users' requirements for the performance, portability, and convenience of use of devices are increasing day by day. Taking high-speed violent fans, hair dryers, and power tools as examples, in outdoor or mobile scenarios, the portability of battery power supply is crucial; while when used indoors for a long time, AC mains power supply can ensure the continuous and stable operation of the device. However, existing electric devices generally have problems such as a single power supply mode or an imperfect switching mechanism. When relying solely on battery power supply, the battery life is limited, and frequent charging brings inconvenience to users; if only AC mains power supply is supported, the usage scenarios of the device will be greatly restricted.

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

[0004] In addition, the rotor magnet design and assembly process of traditional motors have defects, which limit the further improvement of motor performance. For example, for a traditional magnetic ring composed of tile-shaped magnets spliced together, the magnetic field distribution is uneven, resulting in large vibration and noise during motor operation and affecting the user experience. Summary of the Invention

[0005] In view of the above defects or improvement requirements of the prior art, the present invention provides an electromagnetic structure with a dual-power supply mode and a dual-power supply brushless motor including the same, which can flexibly switch the power supply mode, operate efficiently and stably, and have a controllable cost.

[0006] To achieve the above object, according to the present invention, there is provided an electromagnetic structure with a dual-power supply mode, including a stator assembly and a rotor assembly. The stator assembly includes a stator core and a stator winding mounted on the stator core. The rotor assembly includes a magnetic ring, and is characterized in that

[0007] the stator winding includes a DC winding for connecting a DC power supply and an AC winding for connecting an AC power supply;

[0008] the DC winding includes 3N DC coil units and they are circumferentially and uniformly arranged on the stator core, and these 3N DC coil units are connected to the DC power supply by a star connection or a delta connection;

[0009] The AC winding has 3N AC coil units which are circumferentially and uniformly arranged on the stator core, and these 3N AC coil units are connected to an AC power supply by a star connection or a delta connection;

[0010] Wherein, N is a positive integer.

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

[0012] The stator core has 6N tooth portions which are circumferentially and uniformly arranged, and these 6N tooth portions include 3N DC coil unit mounting tooth portions and 3N AC coil unit mounting tooth portions;

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

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

[0015] The 3N DC coil units and the 3N AC coil units are circumferentially arranged alternately;

[0016] Preferably, N = 1, and the magnetic ring is a four-pole oriented magnetic ring.

[0017] Preferably, the stator core is a non-toothed stator core, the stator winding is a split coil cup, and the 3N DC coil units and the 3N AC coil units are circumferentially arranged alternately.

[0018] Preferably, the stator core is a non-toothed 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 coil unit wire are sleeved together, and:

[0019] The DC winding is formed by winding a plurality of first diamond-shaped coil winding drums which are coaxially stacked and fixed together. Among these first diamond-shaped coils stacked together, they are divided into 3N groups of first diamond-shaped coil groups along the direction of the center line of the first diamond-shaped coil. Each group of the first diamond-shaped coil groups contains P first diamond-shaped coils. Each group of the first diamond-shaped coil groups respectively forms a DC coil unit after winding, wherein P is a positive integer greater than 1;

[0020] The AC winding is formed by winding a plurality of second diamond-shaped coils that are coaxially stacked and fixed together around a reel. Among them, for these second diamond-shaped coils stacked together, they are divided into 3N groups of second diamond-shaped coil groups along the direction of the center line of the second diamond-shaped coil. Each group of the second diamond-shaped coil groups contains Q second diamond-shaped coils. After winding, each group of the second diamond-shaped coil groups forms an AC coil unit respectively, where Q is a positive integer greater than 1.

[0021] 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.

[0022] Preferably, the power supply modes of DC and AC are selected through a gear switch.

[0023] According to another aspect of the present invention, a dual-powered brushless motor is further provided, which is characterized by including the electromagnetic structure with the dual-powered mode described above.

[0024] Generally speaking, compared with the prior art through the above technical solutions conceived by the present invention, the following beneficial effects can be achieved:

[0025] 1) For the electromagnetic structure with the dual-powered mode of the present invention, users can freely choose DC power supply or AC power supply according to the actual scenario, meeting the usage requirements in different environments. Whether it is outdoor operation or long-term indoor use, the equipment can operate stably, significantly improving the usage flexibility.

[0026] 2) For the electromagnetic structure with the dual-powered mode of the present invention, by adopting an optimized stator winding design, drive system architecture, and innovative magnetic ring application, the efficiency and performance of the motor in different power supply modes are improved, energy consumption is reduced, the battery service life and the continuous working time of the equipment are extended, and the motor efficiency and performance are enhanced.

[0027] 3) For the electromagnetic structure with the dual-powered mode of the present invention, the integrated drive system design and the integrated design of the integral directional charging sleeve magnetic ring reduce the number of components and system complexity, lower the production difficulty and cost, improve the market competitiveness of the product, and reduce the production cost.

[0028] 4) For the electromagnetic structure with the dual-powered mode of the present invention, the magnetic ring adopts the innovative magnetic ring technology advantage of the directional orientation technology, which improves the electromagnetic performance of the motor, optimizes the magnetic field distribution, reduces the cogging torque fluctuation, enhances the magnetic field intensity, improves the efficiency and stability of the brushless motor, simplifies the assembly process at the same time, improves the production efficiency, and realizes the miniaturization and light weight of the brushless motor. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram when the stator core of the present invention has six tooth parts;

[0030] Figure 2 Magnetic field distribution diagram of the stator core of the present invention with tooth grooves, N = 1, and the magnetic ring being a four-pole directionally oriented magnetic ring;

[0031] Figure 3 Overall schematic diagram of the stator winding of the present invention when it is a split wire cup and N = 1;

[0032] Figure 4 Exploded schematic diagram of the stator winding of the present invention when it is a split wire cup and N = 1;

[0033] Figure 5 Schematic diagram of a plurality of diamond-shaped coils for preparing a DC winding or an AC winding of the present invention stacked together;

[0034] Figure 6 is Figure 5 Front view of a hollow cup coil formed by winding a plurality of diamond-shaped coils of around a reel;

[0035] Figure 7 is Figure 5 Stereogram of a hollow cup coil formed by winding a plurality of diamond-shaped coils of around a reel;

[0036] Figure 8 Schematic diagram of the stator winding of the present invention when using hollow cup coils sleeved together;

[0037] Figure 9 Schematic diagram of the magnetic ring in the present invention. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention 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 only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Refer to Figures 1 to 9 , the electromagnetic structure of the dual-power supply mode includes a stator assembly 1 and a rotor assembly. The stator assembly 1 includes a stator core 11 and a stator winding 12 mounted on the stator core 11. The rotor assembly includes a magnetic ring 2. The stator winding 12 can be arranged on the periphery of the magnetic ring 2 (corresponding to an inner rotor motor), or the magnetic ring 2 can also be arranged on the periphery of the stator winding (corresponding to an outer rotor motor). The stator winding 12 can adopt the structures of a conventional concentrated winding, a distributed winding, a split wire cup or a hollow cup coil.

[0040] The stator winding 12 includes a DC winding 12-1 for connecting a DC power supply and an AC winding for connecting an AC power supply;

[0041] 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 connection or a delta connection, and these DC coil units 121 are powered by the DC power supply.

[0042] The AC winding 12-2 has 3N AC coil units 122 which are circumferentially and uniformly arranged on the stator core 11. These 3N AC coil units 122 are connected to an AC power supply in a star connection or a delta connection; these AC coil units 122 are powered by the AC power supply.

[0043] Wherein, N is a positive integer.

[0044] The star connection or the delta connection is a conventional connection method for the stator winding 12 of the motor, which will not be elaborated here. Which connection method to adopt specifically depends on the voltage and use.

[0045] Users can freely choose DC power supply or AC power supply according to the actual scenario to meet the usage requirements in different environments. Whether it is outdoor operation or long-term indoor use, the device can operate stably, significantly improving the usage flexibility.

[0046] Since the DC winding 12-1 and the AC winding 12-2 do not work simultaneously, it means that half of the stator winding 12 is not energized and heated. The heating density of the working stator winding 12 can reach a higher level, and the excess heat can be quickly transferred and dispersed, so as to improve the power density of the brushless motor of the present invention as much as possible.

[0047] Furthermore, the DC winding 12-1 is powered by a DC power supply of 3.7V - 48V, and the AC winding 12-2 is powered by an AC power supply of 100V - 240V. The DC power supply can use a rechargeable battery, so that a motor can work with both DC low voltage (the DC power supply uses a battery, preferably a rechargeable battery, and can be charged through the TUPE-C port) and wide-voltage mains (AC100V~240V).

[0048] Furthermore, the magnetic ring 2 can be radially magnetized or directionally magnetized. In the present invention, it is preferred that the magnetic ring 2 is a directionally oriented magnetic ring and is an integral magnetic ring without splicing (different from the magnetic ring formed by splicing tile magnets together). The rotor of the brushless motor uses an integral permanent magnet. Compared with the magnetic ring formed by splicing tile magnets together in the past, the overall installation is simple, the process is simplified, and the overall efficiency is improved. In the present invention, it is preferred that the stator winding 12 is on the periphery of the magnetic ring 2, corresponding to an inner rotor motor. Therefore, an external magnetic field directional magnetization technology can be adopted, which can achieve saturation magnetization under the condition of a smaller outer diameter of the permanent magnet, so that the brushless motor of this solution has a power output close to or even exceeding that of a traditional motor.

[0049] The advantages of the directionally oriented magnetic ring are as follows:

[0050] Application of the directionally oriented magnetic ring: The magnetic ring is preferably a sintered neodymium iron boron directionally oriented magnetic ring. When preparing the magnetic ring 2, according to the size and wall thickness of the magnetic ring 2, external magnetic or internal magnetic pulsed magnetic field orientation is adopted. For micro magnetic rings with an outer diameter of less than 5 mm, they are first pressed into solid cylinders and then the inner holes are processed; for those with an outer diameter of more than 10 mm, they are directly pressed into rings; for those with an inner diameter of more than 25 mm, internal magnetic orientation is adopted. By adjusting the pulsed magnetic field intensity, magnetic circuit closure can be achieved, and magnetic rings 2 that meet different requirements can be produced.

[0051] Magnetic field optimization and performance improvement: The directionally oriented magnetic ring can achieve the maximum surface magnetic field strength in a limited space, making the magnetic field distribution of the brushless motor uniform and stable. In cooperation with the double-winding layout, in the battery-powered mode, the strong magnetic field of the magnetic ring 2 cooperates with the low-voltage winding to improve the motor efficiency and extend the equipment battery life; in the AC-powered mode, the working efficiency and stability of the motor are enhanced. At the same time, the cogging torque fluctuation is effectively reduced, the motor vibration and noise are reduced, and the overall stability and service life of the motor are improved. Through experimental verification, compared with traditional motors, the motor efficiency of the directionally oriented magnetic ring of the present invention is significantly improved, and the speed fluctuation is significantly reduced.

[0052] Improving production efficiency and reducing costs: The integrated design of the directionally oriented magnetic ring reduces the number of motor assembly steps and components, reducing the production difficulty and cost. During the production process, the parameters of the magnetic ring 2 can be selected according to the motor characteristics, improving the production efficiency and product consistency, reducing the rejection rate, and enhancing the market competitiveness of the product.

[0053] Achieving miniaturization and light weight: The directionally oriented magnetic ring has a compact structure and provides a strong magnetic field output in a limited space, facilitating the miniaturization and light weight design of the motor, meeting the requirements of equipment with strict space and weight requirements, such as cooling fans, portable power tools, etc.

[0054] Furthermore, the power supply modes of direct current and alternating current can be selected through a gear switch. The power supply mode can be selected through the gear switch, and the switch includes three gears, namely the shutdown gear, the mains power supply gear, and the battery power supply gear. The mains power supply or the battery direct current power supply can be selected through the gear switch. The two power sources are independent of each other and not electrically connected, which can avoid the mutual influence between different voltages.

[0055] Furthermore, referring to Figure 1 、 Figure 2 , as a preferred embodiment of the present invention, the stator core 11 is a toothed stator core 11.

[0056] The stator core 11 has 6N tooth portions which are circumferentially arranged uniformly, and the 6N tooth portions include 3N tooth portions for mounting direct current coil units and 3N tooth portions for mounting alternating current coil units.

[0057] Each direct current coil unit 121 is respectively mounted on a tooth portion for mounting a direct current coil unit of the stator core 11.

[0058] Each alternating current coil unit 122 is respectively mounted on a tooth portion for mounting an alternating current coil unit of the stator core 11.

[0059] The 3N direct current coil units 121 and the 3N alternating current coil units 122 are circumferentially arranged alternately. The 3N direct current coil units 121 are separately connected to the direct current power supply, and the 3N alternating current coil units 122 are separately connected to the alternating current power supply, and the two do not affect each other.

[0060] The stator winding on the toothed stator core 11 of the present invention has the same winding method as the stator winding on the conventional toothed stator core. Each direct current coil unit 121 and each alternating current coil unit 122 are both conventional coils wound on the tooth portions.

[0061] Furthermore, the wire diameter of each direct current coil unit 121 is D 直 and the number of turns is M 直 , the wire diameter of each alternating current coil unit 122 is D 交 and the number of turns is M 交 , D 直 ≥1.5mm 2 , D 交 ≤0.5mm 2 , M 交 ≥2M 直 .

[0062] Furthermore, N = 1, the magnetic ring 2 is a four-pole oriented magnetic ring, and the number of magnetic poles of the magnetic ring 2 is an even number such as 2, 4, 6, etc. The reasonable ratio of slot pole numbers is preferably selected according to the motor principle, which will not be elaborated here.

[0063] When N = 1, the parameter design of the stator winding 12 is as follows:

[0064] DC winding (also known as low-voltage winding): The DC winding has three DC coil units 121. The three DC coil units 121 are arranged on the first tooth part 111, the third tooth part 113, and the fifth tooth part 115 of the stator core 11, and are connected to the DC power supply by star (Y-type) or delta connection to reduce the phase voltage and adapt to the 3.7V - 48V battery power supply. The wire diameter is thick, such as 1.5mm 2 , to support large currents.

[0065] AC winding 12-2 (also known as high-voltage winding): The AC winding 12-2 has three AC coil units 122. The three AC coil units 122 are arranged on the second tooth part 112, the fourth tooth part 114, and the sixth tooth part 116 of the stator core 11, and are connected to the AC power supply by delta (△-type) or star connection to adapt to 100V - 240V alternating current. A thin wire diameter is used, such as 0.5mm 2 , and the number of turns is large, which is twice that of the high-voltage winding, to increase the impedance and reduce the current demand of the AC driver.

[0066] See Figure 1 , the present invention adopts a unique winding layout. The brushless motor adopts a six-slot (tooth) design to construct two independent windings. The first tooth part 111, the third tooth part 113, and the fifth tooth part 115 are installed with DC coil units 121 to adapt to the 7.4V - 36V DC battery power supply, and the low-voltage high-speed winding process is used to ensure the high-speed operation of the motor under low voltage. The second tooth part 112, the fourth tooth part 114, and the sixth tooth part 116 are installed with AC coil units 122, which are suitable for 100V - 240V AC mains power supply. By reasonably planning the winding parameters, the stable operation of the motor under the mains voltage is ensured.

[0067] The pole-slot combination is reconstructed as follows: A four-pole oriented magnetic ring is used to match the 6-slot (tooth) structure of the stator core 11 to reduce the cogging torque fluctuation and enhance the magnetic field space harmonic density.

[0068] The toothed stator core 11 of the present invention preferably employs 6 tooth parts, and coils with corresponding turns are wound on each tooth part respectively. Among them, the first tooth part 111, the third tooth part 113, and the fifth tooth part 115 are wound with DC coil units 121 having a thicker wire diameter and fewer turns, and the second tooth part 112, the fourth tooth part 114, and the sixth tooth part 116 are wound with AC coil units 122 having a thinner wire diameter and more turns. The two groups of coil sets are independent of each other and are both three-phase windings, and are connected according to the Y-type or Δ-type connection method as required (preferably the Y-type, and there is no difference in superiority between the two connection methods). In addition, the stator coils of each group are evenly arranged within the circumferential range, so that the spatial phase difference between the three-phase windings is consistent (usually 120°), and this principle is the same as that of the traditional single stator winding 12, thereby ensuring the balance between the three-phase windings and the balanced operation of the motor.

[0069] Furthermore, referring to Figure 3 、 Figure 4 , as another preference of the present invention, the stator core 11 is a toothed-less stator core 11, the stator winding 12 is a split-line cup, and 3N DC coil units 121 and 3N AC coil units 122 are arranged alternately in the circumferential direction. For the shape of the split-line cup and its preparation, reference can be made to the patent with the publication number CN117182454A and the name "An Automatic Production Line for Forming a Hollow Cup".

[0070] When preparing the split-line cup, each diamond-shaped coil group is wound separately to form 6 independent diamond-shaped coils and stagger them from each other, and then they are formed into a cylindrical split-line cup by using tooling equipment, which is the winding of a well-known hollow brushless motor (also called a slotless brushless motor) in the industry, and the structure of the magnetic ring 2 is exactly the same, which will not be elaborated here.

[0071] Arrange the 6 independent diamond-shaped coils in sequence, and make a cup-shaped winding with the required size specifications through tooling such as rounding and circularity correction. Connect the wire heads and wire tails of the first coil, the third coil, and the fifth coil (they are all DC coil units) to form a DC winding 12-1 with a Y-type (or Δ-type) connection, and connect the wire heads and wire tails of the second coil, the fourth coil, and the sixth coil (they are all AC coil units) to form an AC winding 12-2 with a Y-type (or Δ-type) connection. The two groups of coil sets are independent of each other to meet the occasion of high and low voltage working switching in the usage scenario. Each DC coil unit of the split-line cup is formed by a diamond-shaped coil, and each AC coil unit is also formed by a diamond-shaped coil.

[0072] Furthermore, referring to Figures 5 to 8, As another preference of the present invention, 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, and the DC winding 12-1 and the AC coil unit 122 are sleeved together (the DC winding 12-1 can be inside and the AC winding 12-2 can be outside, or the DC winding 12-1 can be outside and the AC winding 12-2 can be inside), and:

[0073] The DC winding 12-1 is prepared by a winding production process, and the DC winding 12-1 is formed by winding a plurality of first diamond-shaped coil reels that are coaxially stacked and fixed together. Among them, for these first diamond-shaped coils stacked together, they are divided into 3N groups of first diamond-shaped coil groups 1201 along the direction of the center line of the first diamond-shaped coil. Each group of first diamond-shaped coil groups 1201 respectively has P first diamond-shaped coils. Each group of the first diamond-shaped coil groups 1201 respectively forms a DC coil unit 121 after winding, where P is a positive integer greater than 1.

[0074] The AC winding 12-2 is prepared by a winding production process and uses a one-time forming production technology. The AC winding 12-2 is formed by winding a plurality of second diamond-shaped coil reels that are coaxially stacked and fixed together. Among them, for these second diamond-shaped coils stacked together, they are divided into 3N groups of second diamond-shaped coil groups along the direction of the center line of the second diamond-shaped coil. Each group of second diamond-shaped coil groups respectively has Q second diamond-shaped coils. Each group of the second diamond-shaped coil groups respectively forms an AC coil unit after winding, and then a total of 3N AC coil units 121 are formed. Then, the 3N AC coil units 121 can be distinguished and wired according to the three phases of UVW, where Q is a positive integer greater than 1.

[0075] The number of magnetic poles of the magnetic ring is adjusted and adapted accordingly according to the value of N.

[0076] By using a winding production process and a one-time forming production technology, the DC winding 12-1 or the AC winding 12-2 can be wound in one go. According to this process, two kinds of hollow cup combined windings with inner and outer sleeves can be made. The inner cup is the DC winding 12-1 (or the AC winding 12-2), and the outer cup is the AC winding 12-2 (or the DC winding 12-1), thus realizing the production of a combined winding that can be switched between high voltage and low voltage.

[0077] When preparing the split wire cup, the diamond-shaped coils need to be staggered and then shaped (rounded and corrected) into a circular shape. When using the winding production process to prepare the hollow cup coil, the diamond-shaped coils are not staggered before winding and will be flattened when wound on the reel.

[0078] According to another aspect of the present invention, a dual-powered brushless motor is further provided, including the electromagnetic structure of the dual-powered mode described above.

[0079] Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromagnetic structure in a dual power supply mode, comprising a stator assembly and a rotor assembly, wherein the stator assembly comprises a stator core and a stator winding mounted on the stator core, and the rotor assembly comprises a magnetic ring, characterized in that: The stator winding includes a DC winding for connecting to a DC power supply and an AC winding for connecting to an AC power supply; The DC winding includes 3N DC coil units which are evenly arranged on the stator core in the circumferential direction, and the 3N DC coil units are connected to a DC power supply in a star connection or a triangle connection; The AC winding has 3N AC coil units and they are evenly arranged on the stator core in the circumferential direction, and the 3N AC coil units are connected to the AC power supply in a star connection or a triangle connection; Wherein, N is a positive integer.

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

3. The electromagnetic structure of dual power supply mode according to claim 2, characterized in that: N=1, the magnetic ring is a quadrupole directional magnetic ring.

4. The electromagnetic structure of dual power supply mode according to claim 1, characterized in that: The stator core is a slotless stator core, the stator winding is a block coil cup, and 3N DC coil units and 3N AC coil units are alternately arranged in the circumferential direction.

5. The electromagnetic structure of dual power supply mode according to claim 1, characterized in that: 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 coil unit wire are sleeved together, and: The DC winding is formed by winding a plurality of first rhombus coils coaxially stacked and fixed together around a winding drum, wherein the stacked first rhombus coils are divided into 3N groups of first rhombus coil groups along the direction of the center line of the first rhombus coils, each group of the first rhombus coil groups respectively contains P first rhombus coils, and each group of the first rhombus coil groups respectively forms a DC coil unit after winding, wherein P is a positive integer greater than 1; The AC winding is formed by winding a plurality of coaxially stacked and fixed second rhombus coils around a reel, wherein the stacked second rhombus coils are divided into 3N groups of second rhombus coil groups along the direction of the center line of the second rhombus coil, each group of the second rhombus coil groups contains Q second rhombus coils, and each group of the second rhombus coil groups forms an AC coil unit after winding, wherein Q is a positive integer greater than 1.

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

7. The electromagnetic structure of dual power supply mode according to claim 1, characterized in that: Use the gear switch to select DC or AC power supply mode.

8. The dual-powered brushless motor according to claim 1, characterized in that: The electromagnetic structure comprising the dual power supply mode as claimed in any one of claims 1 to 7.

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