Deceleration slewing mechanism for photovoltaic module

Abstract

The utility model relates to a speed reduction swing mechanism for a photovoltaic module, and belongs to the technical field of speed reduction swing mechanisms, the speed reduction swing mechanism comprises a high-cogging-torque permanent magnet motor and a planetary reducer, the output end of the high-cogging-torque permanent magnet motor is connected with the input end of the planetary reducer, the high-cogging-torque permanent magnet motor comprises a stator body and a rotor body, m stator slots are arranged on the stator body, N magnetic steels are arranged on the rotor body, and M: N is a multiple of 3: 2. The high cogging torque of the high cogging torque permanent magnet motor is utilized, after the speed ratio of the planetary reducer is amplified, enough reverse braking torque is achieved, and the reverse braking torque of the execution shaft caused by external force can be resisted. In addition, the planetary reducer is used for replacing a worm gear reducer to achieve decelerating rotation of the execution shaft, the service life is prolonged, energy efficiency and reliability are improved, and product cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of speed reduction rotating mechanisms, and in particular to a speed reduction rotating mechanism for photovoltaic modules. Background Art

[0002] Photovoltaic modules, that is, solar cell modules, are composed of solar panels and aluminum alloy frames. They have the characteristics of long service life and strong mechanical resistance to external compressive forces.

[0003] At present, in order to improve the efficiency of photovoltaic modules, photovoltaic modules are usually equipped with a reduction rotation mechanism, so that the photovoltaic modules can turn over with the sun. The reduction rotation mechanism equipped with existing photovoltaic modules includes a DC brushless motor, a planetary reducer and a worm gear reducer connected in sequence. The back of the photovoltaic module is provided with an actuator shaft, which is rotatably set on the photovoltaic bracket, and the output end of the worm gear reducer is connected to the actuator shaft.

[0004] Regarding the above technical solution, the inventor believes that although the worm gear reducer has a reverse self-locking function, which can ensure the stability of the use of photovoltaic modules; however, the worm gear reducer adopts a worm gear transmission structure, and the meshing angle between the worm wheel and the worm is large, resulting in large friction loss and heat loss, which in turn causes problems such as high energy consumption, high cost, low efficiency and short life. Utility Model Content

[0005] In order to improve service life, energy efficiency and reliability and reduce product costs, the present application provides a reduction rotation mechanism for a photovoltaic module.

[0006] The present application provides a deceleration rotation mechanism for a photovoltaic module, which adopts the following technical solution:

[0007] A reduction rotation mechanism for a photovoltaic module comprises a high cogging torque permanent magnet motor and a planetary reducer, wherein the output end of the high cogging torque permanent magnet motor is connected to the input end of the planetary reducer, the high cogging torque permanent magnet motor comprises a stator body and a rotor body, the stator body is provided with M stator slots, the rotor body is provided with N magnetic steels, and M:N is a multiple of 3:2.

[0008] By adopting the above technical solution, when in use, the output end of the planetary reducer is connected to the executive shaft of the photovoltaic module. After the high cogging torque permanent magnet motor outputs the torque, it is amplified by the speed ratio through the planetary reducer with a large speed ratio and then used by the executive shaft, so as to achieve the purpose of driving the photovoltaic module to flip. Compared with the self-locking property of the worm gear reducer, the slot-pole ratio of the high cogging torque permanent magnet motor in this application is a multiple of 3:2. By utilizing the high cogging torque of the high cogging torque permanent magnet motor, after being amplified by the speed ratio of the planetary reducer, sufficient reverse braking torque can also be achieved, which can resist the counter torque that may be caused to the executive shaft by external forces such as strong winds, foreign objects, etc. In addition, using a planetary reducer instead of a worm gear reducer to achieve the deceleration rotation of the executive shaft is conducive to improving the service life, energy efficiency and reliability, and reducing product costs.

[0009] Optionally, the pole arc coefficient of the high cogging torque permanent magnet motor is greater than 0.75.

[0010] By adopting the above technical solution, it is ensured that the high cogging torque permanent magnet motor has high efficiency and power density, which is beneficial to reduce energy consumption, improve energy efficiency and achieve lightweight of the motor.

[0011] Optionally, the magnetic steel is attached and fixed to the outer circumferential surface of the rotor body.

[0012] By adopting the above technical solution, the magnetic steel is a surface-mounted structure, so that the high cogging torque permanent magnet motor has a higher power density and magnetic field utilization rate, ensuring high efficiency and high control accuracy.

[0013] Optionally, the rotor body is arranged on the inner side of the stator body.

[0014] By adopting the above technical solution, the high cogging torque permanent magnet motor has an inner rotor structure, and its rotor inertia is small, the response speed is fast, and the protection level is high.

[0015] Optionally, the reduction ratio of the planetary reducer is greater than 10000:1.

[0016] By adopting the above technical solution, the planetary reducer is ensured to have a large reduction ratio, so that the reduction rotary mechanism is suitable for application scenarios of low speed and transmission of large torque.

[0017] Optionally, a mounting seat is provided at the bottom of the high cogging torque permanent magnet motor, and at least two waist-shaped mounting holes are provided on the mounting seat.

[0018] By adopting the above technical solution, the waist-shaped mounting holes are provided to facilitate adjustment of the mounting position of the high cogging torque permanent magnet motor, thereby facilitating the installation of the high cogging torque permanent magnet motor.

[0019] Optionally, the high cogging torque permanent magnet motor is a high cogging torque permanent magnet brushless DC motor.

[0020] By adopting the above technical solution, the high cogging torque DC brushless motor has stable torque, small starting current, high efficiency and fast response speed, and is suitable for flipping regulation of photovoltaic modules.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Compared with the self-locking property of the worm gear reducer, the present application utilizes the high cogging torque of the high cogging torque permanent magnet motor, which is amplified by the speed ratio of the planetary reducer to achieve sufficient reverse braking torque, which can resist the counter torque of the actuator shaft caused by external forces such as strong winds and foreign objects. In addition, the use of a planetary reducer instead of a worm gear reducer to achieve the deceleration rotation of the actuator shaft is conducive to improving service life, energy efficiency and reliability, and reducing product costs.

[0023] 2. The pole arc coefficient of the high cogging torque permanent magnet motor in the present application is greater than 0.75, which ensures that the high cogging torque permanent magnet motor has higher efficiency and power density, thereby helping to reduce energy consumption, improve energy efficiency and achieve lightweight of the motor.

[0024] 3. The high cogging torque permanent magnet motor in the present application is a high cogging torque DC brushless motor, and the high cogging torque DC brushless motor has stable torque, small starting current, high efficiency and fast response speed, and is suitable for flipping regulation of photovoltaic modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a deceleration rotating mechanism for a photovoltaic module according to an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram reflecting the internal structure of the high cogging torque permanent magnet motor in the embodiment of the present application, wherein M:N=12:8.

[0027] Figure 3 It is a structural schematic diagram reflecting the internal structure of the high cogging torque permanent magnet motor in the embodiment of the present application, wherein M:N=24:16.

[0028] Explanation of the reference numerals: 1. high cogging torque permanent magnet motor; 11. stator body; 111. stator slot; 12. rotor body; 121. magnetic steel; 2. planetary reducer; 3. mounting seat; 31. waist-shaped mounting hole. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 , further details of this application are given.

[0030] Example:

[0031] The embodiment of the present application discloses a speed reduction rotation mechanism for a photovoltaic module.

[0032] Reference Figure 1 , a deceleration rotation mechanism for a photovoltaic module, comprising a high cogging torque permanent magnet motor 1 and a planetary reducer 2, wherein the output end of the high cogging torque permanent magnet motor 1 is connected to the input end of the planetary reducer 2. When in use, the output end of the planetary reducer 2 is connected to the actuator shaft of the photovoltaic module. After the high cogging torque permanent magnet motor 1 outputs torque, the torque is amplified by the planetary reducer 2 according to the speed ratio and then used by the actuator shaft, thereby achieving the purpose of driving the photovoltaic module to flip. In the present application, the high cogging torque permanent magnet motor 1 is a high cogging torque permanent magnet brushless DC motor, which has the characteristics of stable torque, small starting current, high efficiency and fast response speed, and is suitable for flipping regulation of photovoltaic modules.

[0033] Reference Figure 1 To facilitate the installation of the high cogging torque permanent magnet motor 1 , a mounting seat 3 is fixed to the bottom of the high cogging torque permanent magnet motor 1 , and at least two waist-shaped mounting holes 31 are opened on the mounting seat 3 .

[0034] Reference Figure 2 and Figure 3 The high cogging torque permanent magnet motor 1 includes a stator body 11 and a rotor body 12 arranged inside the stator body 11. M stator slots 111 are provided on the inner circumference of the stator body 11, and N magnets 121 are provided on the outer circumference of the rotor body 12, and M:N is a multiple of 3:2. The N magnets 121 are attached and fixed to the outer wall of the rotor body 12 in a circular array. In this way, the high cogging torque permanent magnet motor 1 is an inner rotor structure with a small rotor inertia, fast response speed, and high protection level; the magnet 121 is a surface-mounted structure, so that the high cogging torque permanent magnet motor 1 has a higher power density and magnetic field utilization rate, ensuring high efficiency and high control accuracy. In this embodiment, M:N is 12:8 or 24:16, that is, in this embodiment, the slot-to-pole ratio of the high cogging torque permanent magnet motor 1 is 12:8 or 24:16.

[0035] The slot-to-pole ratio of the high cogging torque permanent magnet motor 1 in the present application is a multiple of 3:2, and the purpose of increasing the cogging torque is achieved through the motor structure with the slot-to-pole combination. Compared with the self-locking property of the worm gear reducer, the present application utilizes the high cogging torque of the high cogging torque permanent magnet motor 1, and after amplifying the speed ratio of the planetary reducer 2, it also achieves sufficient reverse braking torque, which can resist the counter torque caused by external forces such as strong winds, foreign objects, etc. on the actuator shaft. In addition, the use of the planetary reducer 2 instead of the worm gear reducer to achieve the deceleration rotation of the actuator shaft is conducive to improving the service life, energy efficiency and reliability, and reducing product costs.

[0036] Reference Figure 1-3In order to ensure that the high cogging torque permanent magnet motor 1 has high efficiency and power density, which is beneficial to reducing energy consumption, improving energy efficiency and achieving lightweight of the motor, the pole arc coefficient of the high cogging torque permanent magnet motor 1 is greater than 0.75; in order to ensure that the planetary reducer 2 has a large reduction ratio so that the reduction rotary mechanism can adapt to the application scenarios of low speed and large torque transmission, the reduction ratio of the planetary reducer 2 is greater than 10000:1.

[0037] The implementation principle of a reduction rotation mechanism for a photovoltaic module in an embodiment of the present application is as follows: when in use, the output end of the planetary reducer 2 is connected to the executive shaft of the photovoltaic module. After the high-slot torque permanent magnet motor 1 outputs the torque, the torque is amplified according to the speed ratio through the large-speed-ratio planetary reducer 2 and then provided to the executive shaft for use, thereby achieving the purpose of driving the photovoltaic module to flip.

[0038] The slot-to-pole ratio of the high cogging torque permanent magnet motor 1 in the present application is a multiple of 3:2, and the purpose of increasing the cogging torque is achieved through the motor structure with the slot-to-pole combination. Compared with the self-locking property of the worm gear reducer, the present application utilizes the high cogging torque of the high cogging torque permanent magnet motor 1, and after amplifying the speed ratio of the planetary reducer 2, it also achieves sufficient reverse braking torque, which can resist the counter torque caused by external forces such as strong winds, foreign objects, etc. on the actuator shaft. In addition, the use of the planetary reducer 2 instead of the worm gear reducer to achieve the deceleration rotation of the actuator shaft is conducive to improving the service life, energy efficiency and reliability, and reducing product costs.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deceleration rotation mechanism for a photovoltaic module, characterized in that: The invention comprises a high cogging torque permanent magnet motor (1) and a planetary reducer (2), wherein the output end of the high cogging torque permanent magnet motor (1) is connected to the input end of the planetary reducer (2), the high cogging torque permanent magnet motor (1) comprises a stator body (11) and a rotor body (12), the stator body (11) is provided with M stator slots (111), the rotor body (12) is provided with N magnetic steels (121), and M:N is a multiple of 3:

2.

2. The deceleration rotation mechanism for a photovoltaic module according to claim 1, characterized in that: The pole arc coefficient of the high cogging torque permanent magnet motor (1) is greater than 0.

75.

3. A deceleration rotation mechanism for a photovoltaic module according to claim 2, characterized in that: The magnetic steel (121) is attached and fixed to the outer peripheral surface of the rotor body (12).

4. The deceleration rotation mechanism for a photovoltaic module according to claim 2, characterized in that: The rotor body (12) is arranged on the inner side of the stator body (11).

5. The deceleration rotation mechanism for a photovoltaic module according to claim 1, characterized in that: The reduction ratio of the planetary reducer (2) is greater than 10000:

1.

6. The reduction rotation mechanism for a photovoltaic module according to claim 1, characterized in that: A mounting seat (3) is provided at the bottom of the high cogging torque permanent magnet motor (1), and at least two waist-shaped mounting holes (31) are provided on the mounting seat (3).

7. The reduction rotation mechanism for a photovoltaic module according to claim 1, characterized in that: The high cogging torque permanent magnet motor (1) is a high cogging torque permanent magnet brushless DC motor.

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