Three-ring type one-way driving motor

Abstract

The invention discloses a three-ring type one-way driving motor. The motor comprises an outer-layer electromagnetic ring assembly, a middle-layer electromagnetic ring assembly and an inner-layer electromagnetic ring assembly which are coaxially arranged. The outer-layer electromagnetic ring assembly comprises six groups of first electromagnetic units, and three pairs of first electromagnetic units are symmetrically distributed and circularly electrified to generate a rotating magnetic field; the middle-layer permanent magnet ring assembly is formed by alternately arranging four permanent magnets; the inner layer electromagnetic ring assembly is provided with six or eight groups of second electromagnetic units which alternately work in two groups. A one-way bearing is arranged between the middle layer and the inner layer to guarantee one-way driving. A specific power-on sequence and magnetic field distribution are adopted, and efficient magnetic field interaction is achieved. And through reasonable assembly spacing and selection of permanent magnet materials, the performance of the motor is improved. The motor has the advantages of efficient space utilization, accurate one-way driving, full magnetic field utilization, high performance adjustability and low maintenance cost, is suitable for industrial production, automatic equipment and the like, and can meet various scenes with requirements on one-way driving and one-way driving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, specifically a three-ring unidirectional drive motor, aiming to improve driving efficiency and precise control capability, suitable for automation equipment, precision instruments and occasions requiring high-stable unidirectional rotation. BACKGROUND

[0002] In the prior art, traditional electric machines mainly include DC motors, AC motors and other types. Although DC motors have good speed regulation performance, they require brushes and commutators, have mechanical wear and spark problems, have limited service life, and have high maintenance costs. Although AC motors have simple structure and reliable operation, they have certain deficiencies in precise control of unidirectional driving, and are difficult to meet the requirements of some high-precision unidirectional driving applications.

[0003] In addition, existing electric machines have certain limitations in space utilization and magnetic field utilization efficiency. The magnetic field structure of traditional electric machines is relatively simple, usually a simple magnetic field action between the stator and the rotor, resulting in a relatively large volume and low power density of the electric machine. In some occasions with high space requirements, such as small robots, compact automation equipment, etc., the application of traditional electric machines is limited.

[0004] Moreover, for some devices requiring unidirectional driving, existing electric machines often require additional unidirectional transmission devices such as one-way clutches, which not only increase the complexity and cost of the device, but also may reduce the transmission efficiency and reliability of the entire system. In actual operation, these additional devices may malfunction, affecting the normal operation of the device.

[0005] With the development of industrial automation and intelligence, higher requirements are placed on the performance of electric machines, such as higher power density, more precise unidirectional driving control, smaller size and lower cost. Existing electric machine technology has been difficult to meet these growing demands, so a new type of electric machine needs to be developed to solve the above problems. SUMMARY

[0006] The present application aims to solve the above technical problems and provides a three-ring unidirectional drive motor.

[0007] To solve the above technical problems, the technical solution provided by the present application is as follows: a three-ring unidirectional drive motor, comprising an outer electromagnetic ring assembly, a middle permanent magnet ring assembly and an inner electromagnetic ring assembly arranged coaxially. The outer layer electromagnetic ring assembly includes six groups of first electromagnetic units evenly distributed along the circumference, which are divided into three pairs of symmetrically arranged first electromagnetic units: the first pair of first electromagnetic units is located at 0° and 180° positions, the second pair of first electromagnetic units is located at 60° and 240° positions, and the third pair of first electromagnetic units is located at 120° and 300° positions, and each pair of first electromagnetic units is synchronously powered and generates a directionally opposite radial magnetic field. The middle layer permanent magnet ring assembly includes four permanent magnets alternately arranged along the circumference, wherein the N poles of the permanent magnets at 0° and 180° positions face the center of the circle, and the S poles of the permanent magnets at 90° and 270° positions face the center of the circle. The inner layer electromagnetic ring assembly includes six groups or eight groups of second electromagnetic units distributed along the circumference: when there are six groups, they are divided into two groups of alternately working electromagnetic arrays, the first array includes second electromagnetic units at 0°, 120° and 240° positions, and the second array includes second electromagnetic units at 60°, 180° and 300° positions; when there are eight groups, they are divided into two groups of alternately working electromagnetic arrays, the first array includes second electromagnetic units at 0°, 90°, 180° and 270° positions, and the second array includes second electromagnetic units at 45°, 135°, 225° and 315° positions. A one-way bearing is arranged between the middle layer permanent magnet ring assembly and the inner layer electromagnetic ring assembly, and the rotation direction of the one-way bearing is consistent with the driving direction of the middle layer permanent magnet ring assembly.

[0008] Further, the three pairs of first electromagnetic units of the outer layer electromagnetic ring assembly adopt a cyclic power supply mode, and at any moment, two pairs of first electromagnetic units generate N-pole magnetic field and one pair generates S-pole magnetic field.

[0009] Further, the power supply sequence of the outer layer electromagnetic ring assembly is as follows: First working period: the first pair and the second pair of first electromagnetic units generate N-pole magnetic field, and the third pair of first electromagnetic units generates S-pole magnetic field; Second working period: the second pair and the third pair of first electromagnetic units generate N-pole magnetic field, and the first pair of first electromagnetic units generates S-pole magnetic field; Third working period: the third pair and the first pair of first electromagnetic units generate N-pole magnetic field, and the second pair of first electromagnetic units generates S-pole magnetic field.

[0010] Further, when the inner layer electromagnetic ring assembly is eight groups, the first array generates N-pole radial magnetic field at 0° and 180° positions and S-pole radial magnetic field at 90° and 270° positions when working, and the second array generates N-pole radial magnetic field at 45° and 135° positions and S-pole radial magnetic field at 225° and 315° positions when working. When there are six groups, the second electromagnetic units in the 0°, 120°, 240° positions of the first array generate N-pole radial magnetic fields when the first array is working, and the second electromagnetic units in the 60°, 180°, 300° positions of the second array generate S-pole radial magnetic fields when the second array is working.

[0011] Further, the one-way bearing adopts a ratchet mechanism or an inclined strut clutch structure.

[0012] Further, the radial spacing between the outer electromagnetic ring assembly and the middle permanent magnet ring assembly is 2-5 mm, and the radial spacing between the middle permanent magnet ring assembly and the inner electromagnetic ring assembly is 1-3 mm.

[0013] Further, the permanent magnet adopts a neodymium-iron-boron permanent magnet material, and the surface magnetic induction strength is not less than 1.2 T.

[0014] Further, when the inner electromagnetic ring assembly has six groups, the switching interval of the magnetic field direction of the second electromagnetic units is 60°, and the magnetic field polarity of adjacent second electromagnetic units is alternately distributed.

[0015] Further, when the inner electromagnetic ring assembly has six groups, the second electromagnetic unit winding adopts a delta connection; and when the inner electromagnetic ring assembly has eight groups, the second electromagnetic unit winding adopts a star connection.

[0016] Compared with the prior art, the advantages of the present application are: 1. High space utilization The three-ring coaxial structure design integrates multiple magnetic field assemblies in a limited space, greatly improving the space utilization. Compared with traditional motors, the motor of the present application can achieve higher power output in the same volume, and is suitable for application scenarios with high space requirements.

[0017] 2. Precise one-way driving Through the setting of the one-way bearing 400, the motor can realize precise one-way driving, avoiding the problem of reverse rotation. This is crucial for some devices that require one-way stable driving, such as conveyor belts, fans, etc., which can improve the operation stability and reliability of the equipment.

[0018] 3. Full utilization of magnetic field The cyclic energization mode of the outer electromagnetic ring assembly 100 and the alternating working electromagnetic array of the inner electromagnetic ring assembly 300 cooperate with the permanent magnet magnetic field of the middle permanent magnet ring assembly 200, fully utilizing the energy of the magnetic field and improving the efficiency of the motor. At the same time, the reasonable assembly spacing also ensures the effective interaction of the magnetic field, further improving the performance of the motor.

[0019] 4. Strong performance adjustability The inner electromagnetic ring assembly 300 has two configurations of six groups and eight groups, and the mechanical commutator comprises a switchable electromagnetic field polarity reversing device. This makes the performance of the motor adjustable according to different application requirements, and has strong universality and adaptability.

[0020] 5. Low maintenance cost The motor structure of the present application is relatively simple, without the easily-worn components such as brushes and commutators of traditional DC motors, reducing the probability of mechanical wear and failure, reducing maintenance cost, and prolonging the service life of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an embodiment one of a three-ring type one-way drive motor of the present application.

[0022] Figure 2 is an embodiment two of a three-ring type one-way drive motor of the present application.

[0023] Figure 3 is an assembly schematic diagram of a three-ring type one-way drive motor of the present application.

[0024] As shown in the figure: 100, outer electromagnetic ring assembly; 101, first electromagnetic unit; 200, middle layer permanent magnet ring assembly; 201, permanent magnet; 300, inner electromagnetic ring assembly; 301, second electromagnetic unit; 400, one-way bearing; 500, output shaft. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0026] 0, working principle of the present application: The three-ring type one-way drive motor of the present application comprises an outer electromagnetic ring assembly 100, a middle layer permanent magnet ring assembly 200 and an inner electromagnetic ring assembly 300 arranged coaxially. This three-ring coaxial structure design can fully utilize the space and improve the utilization efficiency of the magnetic field, thereby improving the performance of the motor.

[0027] 1. Outer electromagnetic ring assembly 100 The outer electromagnetic ring assembly 100 comprises six groups of first electromagnetic units 101 uniformly distributed along the circumference, which are divided into three pairs of symmetrically arranged: the first pair of first electromagnetic units 101 is located at 0° and 180° position, the second pair of first electromagnetic units 101 is located at 60° and 240° position, and the third pair of first electromagnetic units 101 is located at 120° and 300° position. Each pair of first electromagnetic units 101 is synchronously energized and generates a radial magnetic field with opposite directions.

[0028] The three pairs of first electromagnetic units 101 of the outer electromagnetic ring assembly 100 adopt a cyclic energization mode, at any time, two pairs of first electromagnetic units 101 generate N-pole magnetic field, and one pair generates S-pole magnetic field. The energization sequence is as follows:

[0029] First working period: the first pair and the second pair of first electromagnetic units 101 generate N-pole magnetic field, and the third pair of first electromagnetic units 101 generates S-pole magnetic field; Second working period: the second pair and the third pair of first electromagnetic units 101 generate N-pole magnetic field, and the first pair of first electromagnetic units 101 generates S-pole magnetic field; Third working period: the third pair and the first pair of first electromagnetic units 101 generate N-pole magnetic field, and the second pair of first electromagnetic units 101 generates S-pole magnetic field.

[0030] Through this cyclic energization mode, the outer electromagnetic ring assembly 100 can generate a rotating magnetic field to provide a power basis for the driving of the motor.

[0031] 2. Middle layer permanent magnet ring assembly 200 The middle layer permanent magnet ring assembly 200 includes four permanent magnets 201 arranged alternately along the circumference, wherein the N-pole of the permanent magnets 201 at 0° and 180° positions faces the center of the circle, and the S-pole of the permanent magnets 201 at 90° and 270° positions faces the center of the circle. The permanent magnets 201 adopt neodymium iron boron permanent magnet material, and the surface magnetic induction strength is not less than 1.2T. The selection and distribution of such permanent magnets can generate a stable and strong magnetic field, which interacts with the magnetic fields of the outer electromagnetic ring assembly 100 and the inner electromagnetic ring assembly 300 to realize the driving of the motor.

[0032] 3. Inner layer electromagnetic ring assembly 300 The inner layer electromagnetic ring assembly 300 includes six or eight groups of second electromagnetic units 301 distributed along the circumference: When there are six groups, they are divided into two groups of alternating electromagnetic arrays, the first array includes the second electromagnetic units 301 at 0°, 120°, and 240° positions, and the second array includes the second electromagnetic units 301 at 60°, 180°, and 300° positions. When the first array works, the second electromagnetic units 301 at 0°, 120°, and 240° positions generate N-pole radial magnetic field, and when the second array works, the second electromagnetic units 301 at 60°, 180°, and 300° positions generate S-pole radial magnetic field. At this time, the magnetic field direction switching interval of the second electromagnetic units 301 is 60°, and the magnetic field polarity of adjacent second electromagnetic units 301 is alternately distributed. When six groups are adopted, the winding of the second electromagnetic units 301 adopts a delta connection.

[0033] When eight groups are alternately working electromagnetic arrays, the first array contains the second electromagnetic units 301 of 0°, 90°, 180°, 270° positions, and the second array contains the second electromagnetic units 301 of 45°, 135°, 225°, 315° positions. When the first array works, the second electromagnetic units 301 of 0° and 180° positions generate N-pole radial magnetic field, and the second electromagnetic units 301 of 90° and 270° positions generate S-pole radial magnetic field; when the second array works, the second electromagnetic units 301 of 45° and 135° positions generate N-pole radial magnetic field, and the second electromagnetic units 301 of 225° and 315° positions generate S-pole radial magnetic field. When eight groups are used, the second electromagnetic units 301 winding of the groups adopts star connection.

[0034] 4. One-way bearing 400 The one-way bearing 400 is arranged between the middle layer permanent magnetic ring assembly 200 and the inner layer electromagnetic ring 300 assembly, and the rotating direction of the one-way bearing 400 is consistent with the driving direction of the middle layer permanent magnetic ring assembly 200. The one-way bearing 400 adopts a ratchet mechanism or an inclined support clutch structure, which can ensure that the motor realizes a one-way driving function, avoids reverse rotation, and improves the stability and reliability of the motor.

[0035] 5. Output shaft 500 and mechanical commutator The output shaft 500 is further arranged at the center of the inner layer electromagnetic ring assembly 300, and the mechanical commutator of the output shaft 500 comprises a switchable electromagnetic field polarity reversing device. The device can switch the electromagnetic field polarity of the inner layer electromagnetic ring assembly 300 as needed, further optimizing the performance and control mode of the motor.

[0036] The radial distance between the outer layer electromagnetic ring assembly 100 and the middle layer permanent magnetic ring assembly 200 is 2-5 mm, and the radial distance between the middle layer permanent magnetic ring assembly 200 and the inner layer electromagnetic ring assembly 300 is 1-3 mm. Such a reasonable distance setting can not only ensure that the magnetic fields between the assemblies can effectively interact with each other, but also avoid mechanical interference between the assemblies, ensuring the normal operation of the motor.

[0037] The working principle of the three-ring one-way driving motor of the application is based on the interaction of magnetic fields. The outer layer electromagnetic ring assembly 100 generates a rotating magnetic field through cyclic energization, which interacts with the permanent magnet magnetic field of the middle layer permanent magnetic ring assembly 200, so that the middle layer permanent magnetic ring assembly 200 generates a rotating trend.

[0038] The rotation of the middle layer permanent magnetic ring assembly 200 is transmitted to the inner layer electromagnetic ring assembly 300 through the one-way bearing 400. The two groups of alternately working electromagnetic arrays of the inner layer electromagnetic ring assembly 300 generate corresponding magnetic fields according to different configurations, which further interact with the magnetic field of the middle layer permanent magnetic ring assembly 200, so as to drive the inner layer electromagnetic ring assembly 300 to rotate, thereby driving the output shaft 500 to output power.

[0039] The function of the one-way bearing 400 is to ensure that power is transmitted to the inner electromagnetic ring assembly 300 only when the middle permanent magnet ring assembly 200 rotates in the predetermined driving direction, avoiding reverse rotation and achieving the one-way driving function of the motor.

[0040] The electromagnetic field polarity reversing device in the mechanical commutator can switch the electromagnetic field polarity of the inner electromagnetic ring assembly 300 according to the operating state and control requirements of the motor, optimizing the torque output and operating efficiency of the motor.

[0041] 2.1 Assembly method Ensure that all components are clean and undamaged, including the outer electromagnetic ring assembly 100, the middle permanent magnet ring assembly 200, the inner electromagnetic ring assembly 300, and the one-way bearing 400. Fix six first electromagnetic units 101 on the outer ring according to the designed position, ensuring electrical isolation and mechanical stability between the electromagnetic units; set up the circuit connection to prepare for subsequent cyclic energization. Fix four permanent magnets 201 on the middle ring with N-S poles symmetrically distributed, ensuring the correct direction of the magnetic poles. Maintain an accurate radial distance of 2-5 mm between this layer and the outer electromagnetic ring, and use positioning pins or laser calibration to ensure accurate positioning. For six groups of configuration, install the electromagnetic units at positions of 0°, 120°, 240° and 60°, 180°, 300°, ensuring correct winding. For eight groups of configuration, install them at positions of 0°, 90°, 180°, 270° and 45°, 135°, 225°, 315°, using star connection. The wires inside the components should be pre-arranged to avoid interference during final assembly.

[0042] Install the one-way bearing 400 accurately below the inner electromagnetic ring, ensuring that its contact surface with the middle permanent magnet ring is flat, and use precise positioning tools. The bearing should be selected considering the load capacity and speed requirements to ensure smooth one-way transmission. Install the output shaft 500 in the center of the inner electromagnetic ring, integrate the mechanical commutator on the shaft, and add the electromagnetic field polarity reversing device if necessary. Ensure the concentricity of the shaft and the correct position of the commutator to ensure smooth rotation and control accuracy.

[0043] Assemble the entire motor into one body, check the gaps, alignment, and electrical connections between each layer one by one. Perform a no-load test to check the motor's starting, running, temperature rise, noise, and other performance indicators, and make necessary adjustments. According to the application environment of the motor, perform necessary sealing treatment to prevent dust and moisture from entering, prolonging the service life.

[0044] 2.2 Example one: six groups of second electromagnetic unit configuration In this embodiment, the inner electromagnetic ring assembly 300 is configured with six sets of second electromagnetic units 301, which are arranged in a specific geometric distribution to achieve efficient electromagnetic force conversion. The specific distribution is as follows: the first array includes electromagnetic units at positions of 0°, 120°, and 240°, generating N-pole magnetic fields; and the second array includes electromagnetic units at positions of 60°, 180°, and 300°, generating S-pole magnetic fields. This configuration ensures that at any time, the magnetic fields generated by electromagnetic units at two opposite positions are in opposite directions, forming an effective driving torque.

[0045] Each set of electromagnetic units is wound with high-quality copper wire to ensure that a stable magnetic field is generated when current passes through. These electromagnetic units are fixed on the inner ring and precisely aligned to the predetermined angles. Through microprocessor control, rapid switching of electromagnetic units is achieved. When the electromagnetic units of the first array are activated to generate N-pole magnetic fields, the electromagnetic units at the corresponding positions of the second array generate S-pole magnetic fields, and vice versa. This alternating activation ensures the continuous rotation of the motor, and the speed and direction are adjusted by changing the energization sequence.

[0046] 2.3 Embodiment Two: Configuration of Eight Sets of Second Electromagnetic Units In the second embodiment, the inner electromagnetic ring assembly uses a more refined layout of eight sets of second electromagnetic units. This configuration is divided into two arrays, the first array includes electromagnetic units at positions of 0°, 90°, 180°, and 270°, while the second array includes electromagnetic units at positions of 45°, 135°, 225°, and 315°. Such a design aims to achieve a smoother torque curve and higher speed control accuracy through a more intensive magnetic field distribution.

[0047] Each set of electromagnetic units is designed with independent windings to facilitate precise control of the polarity and strength of the magnetic field. Star connection is used to balance voltage distribution, ensuring consistent magnetic field strength for each electromagnetic unit. More complex control algorithms are introduced to optimize the on-off timing of each electromagnetic unit, achieving delicate magnetic field control, thereby achieving higher torque control accuracy and reducing vibration. The eight-set configuration provides more detailed magnetic field regulation capability, suitable for precision equipment that requires high stability and fine speed control, such as medical instruments and high-end optical equipment for precise positioning systems.

[0048] The above describes the present application and its embodiments, which are not limiting, and the drawings shown are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the present application.

Claims

1. A three-ring type one-way drive motor, characterized by, It comprises an outer electromagnetic ring assembly (100), a middle permanent magnetic ring assembly (200) and an inner electromagnetic ring assembly (300) which are coaxially arranged; The outer electromagnetic ring assembly (100) comprises six groups of first electromagnetic units (101) uniformly distributed along the circumference, which are symmetrically arranged in three pairs: the first pair of first electromagnetic units (101) is located at 0° and 180°, the second pair of first electromagnetic units (101) is located at 60° and 240°, and the third pair of first electromagnetic units (101) is located at 120° and 300°, and each pair of first electromagnetic units (101) is energized synchronously and generates radial magnetic fields in opposite directions; The middle layer permanent magnet ring assembly (200) comprises four permanent magnets (201) arranged alternately along the circumference, wherein the N poles of the permanent magnets (201) at positions 0° and 180° face the center of the circle, and the S poles of the permanent magnets (201) at positions 90° and 270° face the center of the circle; The inner electromagnetic ring assembly (300) comprises six or eight groups of second electromagnetic units (301) distributed along the circumference: when there are six groups, the assembly is divided into two groups of electromagnetic arrays that work alternately, the first array comprises second electromagnetic units (301) at positions of 0°, 120°, and 240°, and the second array comprises second electromagnetic units (301) at positions of 60°, 180°, and 300°; when there are eight groups, the assembly is divided into two groups of electromagnetic arrays that work alternately, the first array comprises second electromagnetic units (301) at positions of 0°, 90°, 180°, and 270°, and the second array comprises second electromagnetic units (301) at positions of 45°, 135°, 225°, and 315°; A one-way bearing (400) is provided between the middle layer permanent magnet ring assembly (200) and the inner layer electromagnetic ring (300) assembly, and its rotation direction is consistent with the driving direction of the middle layer permanent magnet ring assembly (200).

2. A three-ring one-way drive motor according to claim 1, characterized in that The three pairs of first electromagnetic units (101) of the outer electromagnetic ring assembly (100) adopt a cyclic power-on mode, and at any moment, two pairs of the first electromagnetic units (101) generate an N-pole magnetic field, and one pair generates an S-pole magnetic field.

3. A three-ring one-way drive motor according to claim 2, wherein The power-on sequence of the outer electromagnetic ring assembly (100) is: In a first working cycle, the first and second pairs of first electromagnetic units (101) generate an N-pole magnetic field, and the third pair of first electromagnetic units (101) generates an S-pole magnetic field; Second working cycle: the second and third pairs of first electromagnetic units (101) generate an N-pole magnetic field, and the first pair of first electromagnetic units (101) generates an S-pole magnetic field; Third working cycle: the third pair and the first pair of first electromagnetic units (101) generate an N-pole magnetic field, and the second pair of first electromagnetic units (101) generates an S-pole magnetic field.

4. A three-ring one-way drive motor according to claim 1, wherein When the inner electromagnetic ring assembly (300) is in eight groups, when the first array is working, the second electromagnetic units (301) at the 0° and 180° positions generate an N-pole radial magnetic field, and the second electromagnetic units (301) at the 90° and 270° positions generate an S-pole radial magnetic field; when the second array is working, the second electromagnetic units (301) at the 45° and 135° positions generate an N-pole radial magnetic field, and the second electromagnetic units (301) at the 225° and 315° positions generate an S-pole radial magnetic field; When six groups, the first array works 0°, 120°, 240° position of the second electromagnetic unit (301) to produce N pole radial magnetic field, the second array works 60°, 180°, 300° position of the second electromagnetic unit (301) to produce S pole radial magnetic field.

5. A three-ring one-way drive motor according to claim 1, wherein The one-way bearing (400) adopts a ratchet mechanism or an inclined strut clutch structure.

6. A three-ring one-way drive motor according to claim 1, characterized in that: The inner electromagnetic ring assembly (300) is further provided with an output shaft (500) in the center, and the output shaft (500) is provided with a mechanical commutator, and the mechanical commutator comprises a switchable electromagnetic field polarity reversing device.

7. A three-ring one-way drive motor according to claim 1, wherein The radial distance between the outer electromagnetic ring assembly (100) and the middle permanent magnetic ring assembly (200) is 2-5 mm, and the radial distance between the middle permanent magnetic ring assembly (200) and the inner electromagnetic ring assembly (300) is 1-3 mm.

8. A three-ring one-way drive motor according to claim 1, wherein The permanent magnet (201) adopts a neodymium iron boron permanent magnetic material, and the surface magnetic induction strength is not less than 1.2 T.

9. A three-ring one-way drive motor according to claim 4, wherein When the inner electromagnetic ring assembly (300) is configured with six groups, the magnetic field direction switching interval of the second electromagnetic unit (301) is 60°, and the magnetic field polarity of adjacent second electromagnetic units (301) is alternately distributed.

10. A three-ring one-way drive motor according to claim 1, wherein When the inner electromagnetic ring assembly (300) is configured with six groups, the winding of the second electromagnetic unit (301) adopts a delta connection; when configured with eight groups, the winding of the second electromagnetic unit (301) adopts a star connection.

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