Double-coil brushless motor control system and method supporting wireless energy transmission

Abstract

The invention discloses a double-coil brushless motor control system and method supporting wireless energy transmission, and belongs to the technical field of brushless motors, and the system comprises a stator housing, a rotor housing, and a winding coil assembly. The system further comprises a stator-side data acquisition module, a stator-side data analysis module, a stator-side power supply module, a stator-side driving module, a rotor-side rechargeable battery module, a rotor-side data analysis module, a rotor-side data acquisition module, a rotor-side driving module and an inverter module. The rotor side data acquisition module comprises an encoder sensor, a current sensor and a temperature sensor, and the rotor side data acquisition module is connected with the rotor side data analysis module; the rotor-side chargeable and dischargeable battery module comprises a rotor-side first charging and discharging battery pack and a rotor-side second charging and discharging battery pack. The invention provides a higher integration level, and the rotating speed and the torque of the brushless motor are improved.

Description

Technical Field

[0001] This invention relates to the technical field of brushless motors, and more particularly to a dual-coil brushless motor control system and method that supports wireless power transmission. Background Technology

[0002] A brushless DC motor (BLDC) is a permanent magnet synchronous motor that uses electronic commutation instead of traditional mechanical commutation. Its basic structure includes a three-phase armature winding fixed to the stator housing and a rotor made of permanent magnet material. Since the rotor does not require external excitation power, the entire motor does not require brushes or mechanical commutators, nor does it rely on rotating electrical contact components such as slip rings. During motor operation, an external drive circuit (typically including an inverter power module and a microcontroller unit) acquires the rotor position information in real time based on Hall effect position sensor signals or back EMF zero-crossing detection results, and precisely controls the energizing sequence of the stator windings accordingly, thereby generating a controllable rotating magnetic field to drive the rotor to operate continuously.

[0003] Compared to brushed DC motors, brushless DC motors have significant advantages such as high reliability, long service life, low electromagnetic interference, no electrical sparks, high efficiency, and high power density. Therefore, they are widely used in applications with high performance and maintainability requirements, such as drones, power tools, precision servo systems, high-speed fans, and rotating display devices.

[0004] However, with the rapid development of artificial intelligence and bionic robotics, multi-degree-of-freedom bionic joint systems place higher demands on drive motors: on the one hand, they need to achieve highly integrated arrangement within a limited space; on the other hand, they need to simultaneously meet comprehensive performance indicators such as high output torque, fast dynamic response, and long-term maintenance-free operation. Against this backdrop, existing brushless DC motors still face the following technical bottlenecks in specific application scenarios:

[0005] Limited output torque: Due to the single stator winding structure and magnetic circuit design, it is difficult to effectively improve the torque output capability without increasing the volume, resulting in insufficient performance when driving large inertia loads (such as large rotating LED arrays).

[0006] Relying on mechanical reduction mechanisms: In order to compensate for insufficient torque, gear reducers are often introduced. However, this approach not only increases the complexity and size of the system, but also introduces additional energy loss and mechanical delay, which restricts the dynamic response speed of the system.

[0007] Power supply and signal transmission rely on slip rings: When integrating sensors, batteries or actuators on rotating parts, traditional solutions require slip rings to transmit electrical energy and signals across the rotating interface. However, slip rings suffer from problems such as contact wear, low reliability, and limited bandwidth, making it difficult to meet the application requirements of high speed, long life and high integration.

[0008] Lack of energy recovery mechanism: Existing brushless motor systems usually do not have the ability to convert rotational kinetic energy into electrical energy and store it, and cannot achieve self-sustaining power supply or wireless energy recycling.

[0009] The aforementioned problems are particularly prominent in emerging fields such as multi-joint drive of bionic robots and high-speed rotating LED display systems, which urgently require a new motor architecture that can overcome the technical limitations in torque, integration and energy management while retaining the inherent advantages of brushless motors.

[0010] To address the aforementioned shortcomings in the existing technology, the present invention aims to provide a dual-coil brushless motor control system and method that supports wireless power transmission. By setting independent windings on the stator and rotor sides respectively, and combining intelligent control strategies and energy recovery mechanisms, the following technical effects are achieved:

[0011] Power supply and energy management for rotating parts can be completed without slip rings;

[0012] Supports wireless power transfer and rotor-side energy storage;

[0013] Significantly improves the output torque and speed performance of the motor;

[0014] Improve system integration and operational reliability, and extend service life.

[0015] This invention is particularly suitable for high-end mechatronics applications with stringent requirements for space compactness, dynamic performance, and maintenance-free characteristics. Summary of the Invention

[0016] This invention addresses the shortcomings of existing technologies by providing a dual-coil brushless motor control system and method that supports wireless power transmission. It offers higher integration, improves the speed and torque of the brushless motor, and thus extends the lifespan of the rotating LED.

[0017] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0018] A dual-coil brushless motor control system supporting wireless power transmission includes a stator housing, a rotor housing, and a winding coil assembly. The winding coil assembly includes a first winding coil and a second winding coil, which are concentrically arranged.

[0019] The rotor housing contains a second magnetic medium, which is coaxially and rotatably arranged with the rotor housing. The stator housing contains an outer bearing assembly, and the rotor housing contains an inner bearing assembly. A limiting assembly is provided between the stator housing and the outer bearing assembly. The limiting assembly includes a retaining ring, a limiting fixing rod, and a magnetic ring.

[0020] The second winding coil is provided with rotor-side three-phase lines, and rotor-side slots are opened on the rotor housing, through which the rotor-side three-phase lines are led out.

[0021] It also includes a stator-side data acquisition module, a stator-side data analysis module, a stator-side power supply module, a stator-side drive module, a rotor-side rechargeable battery module, a rotor-side data analysis module, a rotor-side data acquisition module, a rotor-side drive module, and an inverter module;

[0022] The rotor-side data acquisition module includes an encoder sensor, a current sensor, and a temperature sensor. The rotor-side data acquisition module is connected to the rotor-side data analysis module.

[0023] The rotor-side three-phase lines are connected to the rotor-side drive module, and the rotor-side three-phase lines are connected in parallel to the inverter module. The center point in the second winding coil is also connected to the inverter module, and the inverter module is connected to the rotor-side rechargeable battery module.

[0024] The rotor-side rechargeable battery module includes a first set of rechargeable battery packs on the rotor side and a second set of rechargeable battery packs on the rotor side.

[0025] Furthermore, the stator housing is provided with a first magnetic permeable medium, which is coaxially and rotatably arranged with the stator housing. The first winding coil is provided with stator-side three-phase lines. The stator housing is provided with a stator-side slot, through which the stator-side three-phase lines are led out.

[0026] The stator-side data acquisition module includes an encoder sensor, a current sensor, and a temperature sensor. The stator-side data acquisition module is connected to the stator-side data analysis module.

[0027] The stator-side three-phase lines are connected to the stator-side drive module, the stator-side drive module is connected to the stator-side data analysis module, and the stator-side power supply module is connected to the stator-side drive module.

[0028] Furthermore, the first winding coil is an inner stator coil, the second winding coil is an outer rotor coil, the first magnetic permeable medium is the inner coil magnetic permeable medium, and the second magnetic permeable medium is the outer coil magnetic permeable medium.

[0029] Furthermore, the first winding coil is an outer stator coil, the second winding coil is an inner rotor coil, the first magnetic permeable medium is the outer coil magnetic permeable medium, and the second magnetic permeable medium is the inner coil magnetic permeable medium.

[0030] Furthermore, the retaining ring and magnetic ring are placed inside the stator housing, and the limiting and fixing rod is inserted between the magnetic ring and the rotor housing. The magnetic ring and the rotor housing are arranged to rotate coaxially, and the inner bearing assembly is limited to the rotor housing by the retaining ring.

[0031] Furthermore, the pole ratio of the first winding coil to the second winding coil, the pole stator: pole rotor ratio is 2:1.

[0032] A method for a dual-coil brushless motor control system that supports wireless power transfer, using a dual-coil brushless motor control system that supports wireless power transfer.

[0033] Furthermore, the stator-side data acquisition module and the rotor-side data acquisition module respectively acquire data from the encoder sensor, current sensor, and temperature sensor and feed it back to their respective stator-side data analysis module and rotor-side data analysis module.

[0034] The encoder sensor is installed at the bottom of the stator side. The encoder sensor detects the rotation speed and rotation angle of the magnetic ring and feeds it back to the stator side data analysis module. The stator side data analysis module uses the FOC algorithm to make the first winding coil generate a magnetic field with controllable angle, magnetic field strength and rotation speed through the stator side drive module.

[0035] The current sensor detects and collects the current magnitude of the first winding coil on the stator side and feeds it back to the stator side data analysis module. The stator side data analysis module uses the FOC algorithm to control the magnitude of the magnetic field and has a short-circuit protection function.

[0036] Furthermore, the inverter module receives the signal sent by the rotor-side data analysis module, opens the idle rotor-side three-phase lines according to the commutation time, and generates corresponding electromotive force by cutting the magnetic field lines when the rotor-side three-phase lines rotate, while the encoder sensor senses the current angle.

[0037] When the coil formed by the idle rotor-side three-phase wires is approaching the first winding coil, the stator side increases the current and the magnetic field strength, further increasing the electromotive force induced in the rotor-side three-phase wires. At the same time, the speed is increased without changing the rotor-side commutation frequency. The inverter module will convert the generated AC power into DC power for charging the rotor-side rechargeable battery module.

[0038] Furthermore, when the inverter module converts the generated AC power into DC power for charging the first set of charging and discharging battery packs on the rotor side, since the generated electromotive force is relative to the neutral point and is not grounded with the first set of charging and discharging battery packs on the rotor side, the DC power is supplied to the second set of charging and discharging battery packs on the rotor side to charge, thereby realizing the transmission and storage of wireless power.

[0039] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0040] 1. This application provides a higher degree of integration, which improves the speed and torque of the brushless motor, thereby increasing the lifespan of the rotating LED.

[0041] 2. In this application, the first winding coil cuts magnetic field lines during rotation, and at a specific moment of commutation, the current of the second winding coil is changed to induce current in the first winding coil, thereby inducing an electromotive force. The battery is then charged through the inverter module, effectively reducing the drawbacks of using slip rings, increasing the current of the second winding coil, and further increasing the torque of the brushless DC motor. This brushless motor, which can also perform wireless transmission, is involved in the kinetic energy recovery and transmission to high-speed rotating objects, thereby improving the efficiency of electrical energy use.

[0042] 3. This application addresses the problem of traditional brushless motors being difficult to wire at joints by employing wireless power transmission technology, which makes it easier for brushless motors to achieve higher integration.

[0043] 4. This application addresses the problem that traditional brushless motors have difficulty increasing installation torque and high energy loss when using reducers. It adopts a scheme of simultaneous power supply of dual winding coils and uses FOC to simulate magnetic field rotation. It can maintain high torque under stall conditions and further increase the speed under high speed conditions without changing the commutation frequency on the rotor side. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall assembly structure in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the overall cross-sectional structure in an embodiment of the present invention;

[0046] Figure 3 This is a bottom view of the overall assembly structure in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the inner coil structure in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the outer coil structure in an embodiment of the present invention;

[0049] Figure 6 This is an exploded view of the overall assembly in an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of the control system connection in an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Snap ring; 2. Limiting and fixing rod; 3. Magnetic ring; 4. Outer bearing fixing rod; 5. Outer bearing fixing pin; 6. Outer bearing fixing sleeve one; 7. Outer bearing ball; 8. Outer bearing inner shell; 9. Outer bearing outer shell; 10. Outer bearing fixing sleeve two; 11. Stator outer shell; 12. First magnetic permeable medium; 13. First winding coil; 14. Inner bearing fixing sleeve one; 15. Inner bearing fixing pin; 16. Inner bearing ball; 17. Inner bearing inner shell; 18. Inner bearing outer shell; 19. Inner bearing fixing sleeve two; 20. Rotor outer shell; 21. Second winding coil; 22. Second magnetic medium; 23. Stator-side slot; 24. Rotor-side slot; 25. Rotor-side three-phase line; 26. Stator-side three-phase line; 100. Stator-side data acquisition module; 200. Rotor-side data analysis module; 300. Stator-side data analysis module; 400. Rotor-side drive module; 500. Stator-side drive module; 600. Inverter module; 700. Rotor-side rechargeable battery module; 800. Stator-side power supply module; 900. Rotor-side data acquisition module. Detailed Implementation

[0053] The principles and features of the present invention are described below with reference to all the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0054] Reference Figures 1 to 7 As shown, a dual-coil brushless motor control system supporting wireless power transmission includes a stator housing 11, a rotor housing 20, and a winding coil assembly. The winding coil assembly includes a first winding coil 13 and a second winding coil 21, which are concentrically arranged.

[0055] A first magnetic permeable medium 12 is disposed within the stator housing 11, and the first magnetic permeable medium 12 is coaxially and rotatably disposed with the stator housing 11. A second magnetic permeable medium 22 is disposed within the rotor housing 20, and the second magnetic permeable medium 22 is coaxially and rotatably disposed with the rotor housing 20. An outer bearing assembly is disposed within the stator housing 11, and an inner bearing assembly is disposed within the rotor housing 20. A limiting component is disposed between the stator housing 11 and the outer bearing assembly. This application provides a higher degree of integration, improves the speed and torque of the brushless motor, and thus improves the lifespan of the rotating LED.

[0056] Side slots are opened on the sides of the rotor housing 20 and the stator housing 11. The first winding coil 13 is provided with stator-side three-phase lines 26. The stator housing 11 is provided with stator-side slots 23, through which the stator-side three-phase lines 26 are led out. The second winding coil 21 is provided with rotor-side three-phase lines 25. The rotor housing 20 is provided with rotor-side slots 24, through which the rotor-side three-phase lines 25 are led out. At the same time, the center point of the second winding coil 21 is also led out.

[0057] The ratio of the number of poles of the first winding coil 13 to the number of poles of the second winding coil 21, i.e., the ratio of pole stator to pole rotor, is 2:1.

[0058] In this embodiment, the first winding coil 13 is the inner stator coil, the second winding coil 21 is the outer rotor coil, the first magnetic permeable medium 12 is the inner coil magnetic permeable medium, and the second magnetic permeable medium 22 is the outer coil magnetic permeable medium. Alternatively, the first winding coil 13 and the second winding coil 21 can be reversed, i.e., the first winding coil 13 is the outer stator coil, the second winding coil 21 is the inner rotor coil, the first magnetic permeable medium 12 is the outer coil magnetic permeable medium, and the second magnetic permeable medium 22 is the inner coil magnetic permeable medium, to adapt to different production processes.

[0059] The limiting assembly includes a retaining ring 1, a limiting fixing rod 2, and a magnetic ring 3. The retaining ring 1 and the magnetic ring 3 are placed inside the stator housing 11. The limiting fixing rod 2 is inserted between the magnetic ring 3 and the rotor housing 20. The magnetic ring 3 and the rotor housing 20 are coaxially rotated. The inner bearing assembly and the rotor housing 20 are limited by the retaining ring 1.

[0060] The inner bearing assembly includes an inner bearing retaining pin 15, an inner bearing retaining sleeve 14, an inner bearing ball 16, an inner bearing inner shell 17, an inner bearing outer shell 18, and an inner bearing retaining sleeve 2 19. The outer bearing assembly includes an outer bearing retaining rod 4, an outer bearing retaining pin 5, an outer bearing retaining sleeve 1 6, an outer bearing ball 7, an outer bearing inner shell 8, an outer bearing outer shell 9, and an outer bearing retaining sleeve 2 10. The assembled inner bearing assembly is placed in the groove at the bottom of the rotor housing 20 to reduce friction caused by rotor rotation. The assembled outer bearing assembly is placed in the groove of the stator housing 11, and the outer bearing retaining rod 4 is inserted into the semi-circular notch at the edge of the groove of the stator housing 11 to fix the outer bearing housing 9 and the stator housing 11. Then, the magnetic ring 3 is placed in the groove of the stator housing 11, and the limiting retaining rod 2 is inserted into the semi-circular notch of the magnetic ring 3 and the rotor housing 20 to make the magnetic ring 3 and the rotor housing 20 rotate coaxially.

[0061] A dual-coil brushless motor control system supporting wireless power transmission further includes a stator-side data acquisition module 100, a stator-side data analysis module 300, a stator-side power supply module 800, a stator-side drive module 500, a rotor-side rechargeable battery module 700, a rotor-side data analysis module 200, a rotor-side data acquisition module 900, a rotor-side drive module 400, and an inverter module 600.

[0062] The stator-side data acquisition module 100 includes an encoder sensor, a current sensor, and a temperature sensor, and is connected to the stator-side data analysis module 300. The rotor-side data acquisition module 900 includes an encoder sensor, a current sensor, and a temperature sensor, and is connected to the rotor-side data analysis module 200. The stator-side three-phase line 26 is connected to the stator-side drive module 500, which is connected to the stator-side data analysis module 300. The stator-side power supply module 800 is connected to the stator-side drive module 500. The rotor-side three-phase line 25 is connected to the rotor-side drive module 400, and is connected in parallel to the inverter module 600. The center point of the second winding coil 21 is also connected to the inverter module 600. The inverter module 600 is connected to the rotor-side rechargeable battery module 700. The encoder sensor is installed at the bottom of the stator side. The rotor-side rechargeable battery module 700 includes a first set of rechargeable battery packs on the rotor side and a second set of rechargeable battery packs on the rotor side.

[0063] During rotation, the first winding coil 13 cuts magnetic field lines. Simultaneously, at a specific moment of commutation, the current in the second winding coil 21 is changed, inducing a current and an electromotive force in the first winding coil 13. This electromotive force is then used to charge the battery via the inverter module 600. This effectively reduces the drawbacks of using slip rings, increases the current in the second winding coil 21, and further improves the torque of the brushless DC motor. Furthermore, this brushless motor, capable of wireless power transmission, is used for kinetic energy recovery and transmission to high-speed rotating objects, improving energy efficiency. Addressing the issue of difficult wiring at joints in traditional brushless motors, wireless power transmission technology allows for easier and higher integration of the brushless motor.

[0064] Reference Figure 6 and Figure 7 As shown, a method for a dual-coil brushless motor control system supporting wireless power transmission is described above, which utilizes the aforementioned dual-coil brushless motor control system supporting wireless power transmission.

[0065] Step 1: The stator-side data acquisition module 100 and the rotor-side data acquisition module 900 respectively acquire data from the encoder sensor, current sensor, and temperature sensor, and feed it back to their respective stator-side data analysis modules 300 and 200. The encoder sensor is installed at the bottom of the stator side. It detects the rotational speed and angle of the magnetic ring 3 and feeds it back to the stator-side data analysis module 300. The stator-side data analysis module 300 uses the FOC algorithm to generate a controllable magnetic field with adjustable angle, magnetic field strength, and rotational speed in the first winding coil 13 via the stator-side drive module 500. The current sensor detects and acquires the current in the first winding coil 13 on the stator side and feeds it back to the stator-side data analysis module 300. The stator-side data analysis module 300 uses the FOC algorithm to control the magnitude of the magnetic field. The stator-side data analysis module 300 has a short-circuit protection function.

[0066] Step 2: The inverter module 600 receives the signal sent by the rotor-side data analysis module 200 and opens the idle rotor-side three-phase line 25 according to the commutation time. When the rotor-side three-phase line 25 rotates, it cuts the magnetic field lines and generates a corresponding electromotive force. At the same time, the encoder sensor senses the current angle. When the coil wound by the idle rotor-side three-phase line 25 is approaching the first winding coil 13, the stator side increases the current and the magnetic field strength, further increasing the electromotive force induced by the rotor-side three-phase line 25. At the same time, the speed is increased under the premise that the rotor-side commutation frequency remains unchanged. The inverter module 600 will convert the generated AC power into DC power for charging the rotor-side rechargeable battery module 700.

[0067] The rotor-side rechargeable battery module 700 includes a first rotor-side rechargeable battery pack and a second rotor-side rechargeable battery pack. When the inverter module 600 converts the generated AC power into DC power to charge the first rotor-side rechargeable battery pack, since the generated electromotive force is relative to the neutral point and is not grounded with the first rotor-side rechargeable battery pack, the DC power is then supplied to charge the second rotor-side rechargeable battery pack, thereby realizing wireless power transmission and storage.

[0068] In summary, to address the issues of difficulty in increasing the installation torque of traditional brushless motors and high energy loss when using reducers, a solution with dual-winding coils powered simultaneously was adopted. By using FOC to simulate magnetic field rotation, high torque can be maintained under stall conditions, and at high speeds, the rotational speed can be further increased without changing the commutation frequency on the rotor side.

[0069] The implementation principle of a dual-coil brushless motor control system and method supporting wireless power transmission according to an embodiment of the present invention is as follows:

[0070] Reference Figures 1 to 7As shown, there are two concentric winding coils, namely the first winding coil 13 (inner stator coil) and the second winding coil 21 (outer rotor coil). The second magnetic medium 22 (outer coil magnetic medium) and the rotor housing 20 are fixedly connected to make them rotate coaxially. The first magnetic medium 12 (inner coil magnetic medium) and the stator housing 11 are fixedly connected to make them rotate coaxially. The assembled inner bearing assembly is placed in the groove at the bottom of the rotor housing 20. The assembled outer bearing assembly is placed in the groove of the stator housing 11. The outer bearing fixing rod 4 is inserted into the semi-circular notch at the edge of the groove of the stator housing 11 to fix the outer bearing housing 9 and the stator housing 11. Then, the magnetic ring 3 is placed in the groove of the stator housing 11. The limiting fixing rod 2 is inserted into the semi-circular notch of the magnetic ring 3 and the rotor housing 20 to make the magnetic ring 3 and the rotor housing 20 rotate coaxially.

[0071] The pole ratio of the first winding coil 13 and the second winding coil 21, i.e., the pole stator: pole rotor ratio is 2:1, so that one phase of the second winding coil 21 will be idle during commutation, which is used to generate electromotive force.

[0072] The stator-side data acquisition module 100 is connected to the stator-side encoder sensor, current sensor, and temperature sensor. The stator-side data acquisition module 100 is also connected to the stator-side data analysis module 300. The rotor-side data acquisition module 900 is connected to the rotor-side encoder sensor and current sensor. The rotor-side data acquisition module 900 is also connected to the rotor-side data analysis module 200. The stator-side three-phase line 26 is connected to the stator-side drive module 500. The stator-side drive module 500 is connected to the stator-side data analysis module 300. The stator-side power supply module 800 is connected to the stator-side drive module 500. The rotor-side three-phase line 25 is connected to the rotor drive module. At the same time, the rotor-side three-phase line 25 is connected in parallel to the inverter module 600. The center point in the second winding coil 21 is also connected to the inverter module 600. The inverter module 600 is connected to the rotor-side rechargeable battery module 700.

[0073] The inverter module 600 can receive signals sent by the rotor-side data analysis module 200. According to the commutation time, it opens the idle rotor-side three-phase line 25. According to Faraday's law of electromagnetic induction, the rotor-side three-phase line 25 will cut the magnetic field lines and generate a corresponding electromotive force when rotating. At the same time, the stator-side encoder sensor will sense the current angle. When the coil wound by the idle rotor-side three-phase line 25 is approaching the first winding coil 13 (inner stator coil), the stator side increases the current and strengthens the magnetic field strength. Similarly, according to Faraday's law of electromagnetic induction, it will further increase the electromotive force induced by the rotor-side three-phase line 25. At the same time, it will further increase the speed without changing the rotor-side commutation frequency. The inverter module 600 will convert the generated AC power into DC power for charging the rotor-side rechargeable battery module 700. However, since the generated electromotive force is relative to the neutral point, it does not supply power to the first set of rechargeable battery packs on the rotor side. Therefore, it charges the second set of rechargeable battery packs on the rotor side, realizing wireless power transmission and storage.

[0074] In summary, the first winding coil 13 and the second winding coil 21 are concentrically mounted, and the second magnetic medium 22 and the rotor housing 20 are fixedly connected to make them rotate coaxially. The assembled inner bearing assembly is placed into the slot at the bottom of the rotor housing 20, the assembled outer bearing assembly is placed into the slot of the stator housing 11, and then the magnetic ring 3 is placed into the slot of the stator housing 11. During the rotation of the first winding coil 13, it also cuts the magnetic field lines. At the same time, at a specific moment of commutation, the current of the second winding coil 21 is changed, causing the first winding coil 13 to induce a current and an electromotive force. This current is then used to charge the rotor-side rechargeable battery module 700 through the inverter module 600. This effectively reduces the disadvantages of using slip rings, increases the current of the second winding coil 21, and further increases the torque of the brushless DC motor.

[0075] The above content is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-coil brushless motor control system supporting wireless power transmission, comprising a stator housing (11), a rotor housing (20), and a winding coil assembly, characterized in that: The winding coil assembly includes a first winding coil (13) and a second winding coil (21), wherein the first winding coil (13) and the second winding coil (21) are arranged concentrically; The rotor housing (20) is provided with a second magnetic permeable medium (22), which is coaxially rotated with the rotor housing (20). The stator housing (11) is provided with an outer bearing assembly, and the rotor housing (20) is provided with an inner bearing assembly. A limiting assembly is provided between the stator housing (11) and the outer bearing assembly. The limiting assembly includes a retaining ring (1), a limiting fixing rod (2), and a magnetic ring (3). The second winding coil (21) is provided with rotor-side three-phase wires (25), and a rotor-side slot (24) is opened on the rotor housing (20). The rotor-side three-phase wires (25) are led out through the rotor-side slot (24). It also includes a stator-side data acquisition module (100), a stator-side data analysis module (300), a stator-side power supply module (800), a stator-side drive module (500), a rotor-side rechargeable battery module (700), a rotor-side data analysis module (200), a rotor-side data acquisition module (900), a rotor-side drive module (400), and an inverter module (600); The rotor-side data acquisition module (900) includes an encoder sensor, a current sensor, and a temperature sensor. The rotor-side data acquisition module (900) is connected to the rotor-side data analysis module (200). The rotor-side three-phase line (25) is connected to the rotor-side drive module (400), the rotor-side three-phase line (25) is connected in parallel to the inverter module (600), the center point in the second winding coil (21) is also connected to the inverter module (600), and the inverter module (600) is connected to the rotor-side rechargeable battery module (700). The rotor-side rechargeable battery module (700) includes a first set of rechargeable battery packs on the rotor side and a second set of rechargeable battery packs on the rotor side.

2. The dual-coil brushless motor control system supporting wireless power transmission according to claim 1, characterized in that: The stator housing (11) is provided with a first magnetic permeable medium (12), which is coaxially and rotates with the stator housing (11). The first winding coil (13) is provided with stator-side three-phase lines (26). The stator housing (11) is provided with a stator-side slot (23), and the stator-side three-phase lines (26) are led out through the stator-side slot (23). The stator-side data acquisition module (100) includes an encoder sensor, a current sensor, and a temperature sensor. The stator-side data acquisition module (100) is connected to the stator-side data analysis module (300). The stator-side three-phase line (26) is connected to the stator-side drive module (500), the stator-side drive module (500) is connected to the stator-side data analysis module (300), and the stator-side power supply module (800) is connected to the stator-side drive module (500).

3. A dual-coil brushless motor control system supporting wireless power transmission according to claim 2, characterized in that: The first winding coil (13) is the inner stator coil, the second winding coil (21) is the outer rotor coil, the first magnetic permeable medium (12) is the inner coil magnetic permeable medium, and the second magnetic permeable medium (22) is the outer coil magnetic permeable medium.

4. A dual-coil brushless motor control system supporting wireless power transmission according to claim 2, characterized in that: The first winding coil (13) is the outer stator coil, the second winding coil (21) is the inner rotor coil, the first magnetic permeable medium (12) is the outer coil magnetic permeable medium, and the second magnetic permeable medium (22) is the inner coil magnetic permeable medium.

5. A dual-coil brushless motor control system supporting wireless power transmission according to claim 1, characterized in that: The retaining ring (1) and magnetic ring (3) are placed inside the stator housing (11). The limiting and fixing rod (2) is inserted between the magnetic ring (3) and the rotor housing (20). The magnetic ring (3) and the rotor housing (20) are arranged to rotate coaxially. The inner bearing assembly and the rotor housing (20) are limited by the retaining ring (1).

6. A dual-coil brushless motor control system supporting wireless power transmission according to claim 1, characterized in that: The ratio of the number of poles of the first winding coil (13) to the number of poles of the second winding coil (21) is 2:1 for the pole stator to the pole rotor.

7. A method for controlling a dual-coil brushless motor that supports wireless power transfer, characterized in that: The dual-coil brushless motor control system supporting wireless power transmission as described in any one of claims 1 to 6.

8. The method for a dual-coil brushless motor control system supporting wireless power transmission according to claim 7, characterized in that: The stator-side data acquisition module (100) and the rotor-side data acquisition module (900) respectively acquire data from the encoder sensor, current sensor, and temperature sensor and feed it back to their respective stator-side data analysis module (300) and rotor-side data analysis module (200). The encoder sensor is installed at the bottom of the stator side. The encoder sensor detects the rotation speed and rotation angle of the magnetic ring (3) and feeds it back to the stator side data analysis module (300). The stator side data analysis module (300) uses the FOC algorithm to make the first winding coil (13) generate a magnetic field with controllable angle, magnetic field strength and rotation speed through the stator side drive module (500). The current sensor detects and collects the current magnitude of the first winding coil (13) on the stator side and feeds it back to the stator side data analysis module (300). The stator side data analysis module (300) uses the FOC algorithm to control the magnitude of the magnetic field. The stator side data analysis module (300) has a short-circuit protection function.

9. The method for a dual-coil brushless motor control system supporting wireless power transmission according to claim 7, characterized in that: The inverter module (600) receives the signal sent by the rotor-side data analysis module (200), and opens the idle rotor-side three-phase line (25) according to the commutation time. When the rotor-side three-phase line (25) rotates, it cuts the magnetic field lines to generate a corresponding electromotive force, and at the same time the encoder sensor senses the current angle. When the coil formed by the idle rotor-side three-phase line (25) is approaching the first winding coil (13), the stator side increases the current, increases the magnetic field strength, and further increases the electromotive force induced by the rotor-side three-phase line (25). At the same time, the speed is increased under the premise that the rotor-side commutation frequency remains unchanged. The inverter module (600) will convert the generated AC power into DC power for charging the rotor-side rechargeable battery module (700).

10. A method for a dual-coil brushless motor control system supporting wireless power transmission according to claim 7, characterized in that: When the inverter module (600) converts the generated AC power into DC power for charging the first set of charging and discharging battery packs on the rotor side, since the generated electromotive force is relative to the neutral point and is not grounded with the first set of charging and discharging battery packs on the rotor side, the DC power is supplied to the second set of charging and discharging battery packs on the rotor side to charge, thereby realizing the transmission and storage of wireless power.

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