A structure device for realizing speed feedback of AC inner rotor motor

Abstract

The application relates to a structure device for realizing speed feedback of an alternating current inner rotor motor, which comprises an inner rotor motor, a cylinder and a motor mounting plate for mounting the inner rotor motor, the surface of the inner rotor motor is connected with one end of the motor mounting plate, the other end of the motor mounting plate is connected with the cylinder, the cylinder is sleeved on the surface of the inner rotor motor, a fan blade and an inductive metal sheet for speed feedback of the inner rotor motor are arranged on the output end of the inner rotor motor, and a speed sensor and a mounting assembly for speed feedback of the inner rotor motor and matched with the inductive metal sheet are arranged on the speed motor. The inductive metal sheet is matched with the speed sensor for use, when the inner rotor motor operates, the output end drives the inductive metal sheet to rotate synchronously, the speed sensor can capture the rotating information of the inductive metal sheet in real time, and then the speed of the inner rotor motor is accurately fed back, the direct detection mode reduces the interference of intermediate transmission links, and the precision of the speed feedback is improved.

Description

Technical Field

[0001] This application relates to the field of motor control technology, and in particular to a structural device for realizing speed feedback of an AC internal rotor motor. Background Technology

[0002] With the widespread adoption and increasing application of intelligent technologies, more and more applications require the measurement and control of motor speed, necessitating motor speed signal feedback. A common speed feedback mechanism involves mounting a magnetic ring close to the motor body on the motor shaft between the motor and the fan blades. A series of PCB circuit boards with Hall effect sensors are mounted on the outside of the magnetic ring. When the motor rotates, the Hall effect sensors detect the speed of the magnetic ring, i.e., the motor's speed, and the PCB board outputs a speed signal, thus achieving the purpose of monitoring and controlling the motor's speed.

[0003] However, in the existing technology, the speed feedback of the internal rotor motor is provided by Hall sensor, which has high installation and maintenance costs, certain requirements for the working environment, and may cause the motor to overheat and be susceptible to electromagnetic interference, affecting the stability of the speed feedback. Utility Model Content

[0004] To address the problem that prolonged operation of an internal rotor motor in the prior art may lead to motor overheating, making the Hall sensor susceptible to electromagnetic interference and affecting the stability of speed feedback, this application provides a structural device for realizing speed feedback of an AC internal rotor motor.

[0005] This application provides a structural device for realizing speed feedback of an AC internal rotor motor, which adopts the following technical solution: A structural device for realizing speed feedback of an AC internal rotor motor includes an internal rotor motor, a cylinder, and a motor mounting plate for mounting the internal rotor motor. The surface of the internal rotor motor is connected to one end of the motor mounting plate, and the other end of the motor mounting plate is connected to the cylinder. The cylinder is sleeved on the surface of the internal rotor motor. The output end of the internal rotor motor is provided with fan blades and a sensing metal sheet for speed feedback of the internal rotor motor. The speed motor is provided with a speed sensor and a mounting assembly for speed feedback of the internal rotor motor and in cooperation with the sensing metal sheet. The speed sensor is mounted on the internal rotor motor through the mounting assembly.

[0006] By adopting the above technical solution, the sensing metal sheet is used in conjunction with the speed sensor. When the inner rotor motor is running, the output end drives the sensing metal sheet to rotate synchronously. The speed sensor can capture the rotation information of the sensing metal sheet in real time, thereby accurately feeding back the speed of the inner rotor motor. This direct detection method reduces the interference of intermediate transmission links and improves the accuracy of speed feedback. At the same time, the fan blades are set at the output end of the inner rotor motor, which can play a heat dissipation role when the motor is running, avoiding the motor from being affected by overheating and indirectly ensuring the stable operation of the speed feedback system and ensuring the reliability of the feedback data.

[0007] Preferably, the mounting assembly includes a shock-absorbing structure, a support frame, and a nut. The shock-absorbing structure is mounted on the inner rotor motor, the support frame is mounted on the shock-absorbing structure, the nut is mounted on the support frame, and the surface of the speed sensor is threadedly connected to the nut.

[0008] By adopting the above technical solution, the vibration damping structure is directly installed on the internal rotor motor, which can effectively absorb the vibration generated during motor operation. The speed sensor is indirectly connected to the motor through the support frame and nut. After the vibration is filtered by the vibration damping structure, the positional displacement or signal jitter of the sensor caused by vibration can be greatly reduced, avoiding speed measurement errors caused by mechanical vibration interference, and ensuring the stability and accuracy of the speed feedback signal. At the same time, the speed sensor and the nut are connected by threads, which not only ensures a firm installation, but also allows for fine adjustment of the distance between the sensor and the sensing metal plate by rotating the sensor, which is convenient for optimizing the detection effect according to the actual working conditions and adapting to sensing metal plates of different thicknesses or shapes.

[0009] Preferably, the shock absorption structure includes a fixed plate, a shock absorber, and a connecting plate. The fixed plate is connected to the inner rotor motor, the two ends of the shock absorber are respectively connected to the connecting plate and the fixed plate, and the connecting plate is connected to the support frame.

[0010] By adopting the above technical solution, the fixed plate is directly connected to the inner rotor motor, serving as the "first contact layer" for vibration transmission, which can concentrate and guide the vibration of the motor to the shock absorber; the shock absorber, as the core buffer component (rubber shock absorber pads, spring shock absorbers, etc. can be selected), absorbs most of the vibration energy through its own deformation; the connecting plate serves as the "output layer", transmitting the filtered low vibration to the support frame and speed sensor.

[0011] Preferably, the connection between the inner rotor motor and the motor mounting plate is a detachable connection.

[0012] By adopting the above technical solution, the detachable connection allows the motor mounting plate to be fixed to other structures such as cylinders first, and then the inner rotor motor to be installed separately, which reduces the difficulty of overall assembly. At the same time, if the motor mounting plate is deformed or damaged, the motor mounting plate can be replaced separately without replacing the inner rotor motor, which reduces unnecessary waste of parts and lowers maintenance costs.

[0013] Preferably, a connector is provided on the surface of the cylinder, and the connector is electrically connected to the speed sensor and the inner rotor motor.

[0014] By adopting the above technical solution, the connector, as a centralized node for circuit connections, can centrally connect the signal lines of the speed sensor, the power lines or control lines of the internal rotor motor, etc., avoiding multiple lines being directly scattered or tangled around the motor or cylinder. This centralized design simplifies the wiring layout, making the entire circuit section of the device neater and reducing the risk of accidental contact, wear, or short circuits caused by messy wiring.

[0015] Preferably, a pair of grids for blocking garbage are detachably installed on the inner wall of the cylinder, and the fan blades and speed sensor are located between the grids.

[0016] By adopting the above technical solutions, the barrier can effectively block garbage (such as debris, fibers, small particles, etc.) from the external environment from entering the area where the fan blades and speed sensors are located. For high-speed rotating fan blades, preventing garbage from being rolled in can prevent the fan blades from being damaged by impact or entanglement (such as blade deformation or motor jamming). For speed sensors, reducing the attachment or obstruction of garbage can ensure the accurate matching between the sensor and the sensing metal plate, and avoid distortion or interruption of the speed feedback signal.

[0017] Preferably, the cylinder has mounting holes for cylinder installation, and the number of mounting holes is several, and the mounting holes are evenly distributed on the cylinder.

[0018] By adopting the above technical solution, the mounting holes are evenly distributed on the cylinder, which means that the force at each connection point can be more evenly distributed to the overall structure of the cylinder when it is fixed. This design can avoid the cylinder from deforming or shifting due to excessive force at a single point or in a local area. Especially for cylindrical structures that need to maintain axial stability, it can effectively ensure the verticality or horizontality after installation and reduce the impact of unstable installation on the operation of internal components such as fan blades and speed sensors.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The induction metal plate is used in conjunction with the speed sensor. When the inner rotor motor is running, the output end drives the induction metal plate to rotate synchronously. The speed sensor can capture the rotation information of the induction metal plate in real time, and thus accurately feed back the speed of the inner rotor motor. This direct detection method reduces the interference of intermediate transmission links and improves the accuracy of speed feedback. At the same time, the fan blade is set at the output end of the inner rotor motor, which can play a heat dissipation role when the motor is running, avoiding the motor from being affected by overheating and indirectly ensuring the stable operation of the speed feedback system and ensuring the reliability of the feedback data. 2. The vibration damping structure is directly installed on the internal rotor motor, which can effectively absorb the vibration generated during motor operation. The speed sensor is indirectly connected to the motor through the support frame and nut. After the vibration is filtered by the vibration damping structure, the positional displacement or signal jitter of the sensor caused by vibration can be greatly reduced, avoiding speed measurement errors caused by mechanical vibration interference, and ensuring the stability and accuracy of the speed feedback signal. At the same time, the speed sensor and the nut are connected by threads, which not only makes the installation firm, but also allows the distance between the sensor and the sensing metal plate to be finely adjusted by rotating the sensor, which is convenient for optimizing the detection effect according to the actual working conditions and adapting to sensing metal plates of different thicknesses or shapes. 3. The fixed plate is directly connected to the inner rotor motor, serving as the "first contact layer" for vibration transmission, which can concentrate and guide the motor's vibration to the shock absorber; the shock absorber, as the core buffer component (rubber shock absorber pads, spring shock absorbers, etc. can be selected), absorbs most of the vibration energy through its own deformation; the connecting plate serves as the "output layer," transmitting the filtered low vibration to the support frame and speed sensor. Attached Figure Description

[0020] Figure 1 This is a front-view perspective view of the structural device for realizing speed feedback of an AC internal rotor motor; Figure 2 This is a front sectional view of the structural device for realizing speed feedback of an AC internal rotor motor; Figure 3 This is a 3D diagram of the installation components and the speed sensor working together. Figure 4 This is a rear sectional view of the structural device for realizing speed feedback of an AC internal rotor motor.

[0021] Reference numerals: 1. Rotor motor; 2. Cylinder; 3. Motor mounting plate; 4. Fan blade; 5. Induction metal sheet; 6. Speed ​​sensor; 7. Mounting assembly; 71. Vibration damping structure; 711. Fixing plate; 712. Vibration damper; 713. Connecting plate; 72. Support frame; 73. Nut; 8. Connector; 9. Barrier; 10. Mounting hole. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4This application will be described in further detail.

[0023] This application discloses a structural device for realizing speed feedback of an AC internal rotor motor.

[0024] Reference Figure 1 and Figure 2 A structural device for realizing speed feedback of an AC internal rotor motor includes an internal rotor motor 1, a cylinder 2, and a motor mounting plate 3 for mounting the internal rotor motor 1. One end of the motor mounting plate 3 is fixedly connected to the surface of the internal rotor motor 1, and the other end of the motor mounting plate 3 is fixedly connected to the inner wall of the cylinder 2. The cylinder 2 is sleeved with the internal rotor motor 1, and the internal rotor motor 1 is located inside the cylinder 2. A fan blade 4 is fixedly connected to the output end of the rotating motor, and a speed sensor 6 and a sensing metal plate 5 are arranged between the fan blade 4 and the internal rotor motor 1. The sensing metal plate 5 is fixedly mounted on the output shaft of the internal rotor motor 1, and a mounting assembly 7 is mounted on the internal rotor motor 1. The speed sensor 6 is fixed to the inner rotor motor 1 by the mounting assembly 7. The speed sensor 6 works in conjunction with the sensing metal plate 5. When the inner rotor motor 1 is running, the output end drives the sensing metal plate 5 to rotate synchronously. The speed sensor 6 can capture the rotation information of the sensing metal plate 5 in real time, and thus accurately feed back the speed of the inner rotor motor 1. This direct detection method reduces the interference of intermediate transmission links and improves the accuracy of speed feedback. At the same time, the fan blade 4 is set at the output end of the inner rotor motor 1, which can play a heat dissipation role when the motor is running, avoiding the motor from being affected by overheating and indirectly ensuring the stable operation of the speed feedback system and ensuring the reliability of the feedback data.

[0025] The fixed connection between the inner rotor motor 1 and the motor mounting plate 3 is a detachable connection. The inner rotor motor 1 and the motor mounting plate 3 are fixedly connected by bolts and nuts. The detachable connection allows the motor mounting plate 3 to be fixed to other structures such as the cylinder 2 first, and then the inner rotor motor 1 to be installed separately. This reduces the difficulty of overall assembly. At the same time, if the motor mounting plate 3 is deformed or damaged, the motor mounting plate 3 can be replaced separately without replacing the inner rotor motor 1. This reduces unnecessary component waste and lowers maintenance costs.

[0026] refer to Figure 2 and Figure 3The mounting assembly 7 includes a shock-absorbing structure 71, a support frame 72, and a nut 73. The bottom of the nut 73 is fixedly connected to the top of the support frame 72, and the nut 73 is threadedly connected to the surface of the speed sensor 6. The side of the support frame 72 closest to the inner rotor motor 1 is fixedly connected to the shock-absorbing structure 71, and the side of the shock-absorbing structure 71 closest to the inner rotor motor 1 is fixedly connected to the surface of the inner rotor motor 1. The shock-absorbing structure 71 is directly mounted on the inner rotor motor 1, which can effectively absorb the vibration generated during motor operation. The speed sensor 6 is indirectly connected to the motor through the support frame 72 and the nut 73. After the vibration is filtered by the shock-absorbing structure 71, the positional shift or signal jitter of the sensor caused by vibration can be greatly reduced, avoiding speed measurement errors caused by mechanical vibration interference, and ensuring the stability and accuracy of the speed feedback signal. At the same time, the speed sensor 6 and the nut 73 are connected by threads, which not only ensures a firm installation, but also allows for fine adjustment of the distance between the sensor and the sensing metal sheet 5 by rotating the sensor, which is convenient for optimizing the detection effect according to the actual working conditions and adapting to sensing metal sheets 5 of different thicknesses or shapes.

[0027] refer to Figure 2 and Figure 3 The vibration damping structure 71 includes a fixed plate 711, a shock absorber 712, and a connecting plate 713. The two ends of the shock absorber 712 are fixedly connected to the fixed plate 711 and the connecting plate 713, respectively. The side of the connecting plate 713 away from the shock absorber 712 is fixedly connected to the support frame 72. The fixed plate 711 is fixed to the inner rotor motor 1 with screws, so that the vibration damping structure 71 can dampen the vibration generated by the inner rotor motor 1 when it is working. The fixed plate 711 is directly connected to the inner rotor motor 1, serving as the "first contact layer" for vibration transmission, which can concentrate and guide the vibration of the motor to the shock absorber 712. The shock absorber 712, as the core buffer component, can be made of rubber damping pads, spring dampers, etc., and absorbs most of the vibration energy through its own deformation. The connecting plate 713 serves as the "output layer," transmitting the filtered low vibration to the support frame 72 and the speed sensor 6.

[0028] refer to Figure 4 A connector 8 is fixedly connected to the surface of the cylinder 2. The connector 8 is connected to the inner rotor motor 1 and the speed sensor 6 via wires. By making the connector 8 a centralized node for circuit connections, the signal line of the speed sensor 6, the power line or control line of the inner rotor motor 1, etc., can be centrally connected, avoiding multiple wires being directly scattered or tangled around the motor or cylinder 2. This centralized design simplifies the wiring layout, makes the circuit part of the entire device neater, and reduces the risk of accidental contact, wear or short circuit caused by messy wiring.

[0029] refer to Figure 4A pair of grids 9 are detachably installed on the inner wall of the cylinder 2. The grids 9 are used to intercept garbage. The fan blade 4 and the speed sensor 6 are located between the two grids 9. The grids 9 protect the fan blade 4 and the speed sensor 6, and prevent garbage (such as debris, fibers, small particles, etc.) from entering the area where the fan blade 4 and the speed sensor 6 are located during operation. For the high-speed rotating fan blade 4, preventing garbage from being rolled in can prevent the fan blade 4 from being damaged by impact or entanglement, such as blade deformation or motor jamming. For the speed sensor 6, reducing the adhesion or obstruction of garbage can ensure its accurate cooperation with the sensing metal plate 5 and avoid distortion or interruption of the speed feedback signal.

[0030] The cylinder 2 has mounting holes 10 for installation, and there are several mounting holes 10 evenly distributed on the cylinder 2. The even distribution of mounting holes 10 on the cylinder 2 means that the force at each connection point can be more evenly distributed to the overall structure of the cylinder 2 when it is fixed. This design can avoid deformation or displacement of the cylinder 2 due to excessive force at a single point or in a local area. Especially for cylindrical structures that need to maintain axial stability, it can effectively ensure the verticality or horizontality after installation and reduce the impact of unstable installation on the operation of internal components such as the fan blade 4 and the speed sensor 6.

[0031] The implementation principle of this application embodiment is as follows: In implementation, the output shaft of the inner rotor motor 1 is driven to rotate. The output shaft of the inner rotor motor 1 drives the fan blade 4 and the sensing metal plate 5 to rotate, so that the speed sensor 6 senses the sensing metal plate 5 and generates pulses. The sensing metal plate 5 generates one pulse at a time through the speed sensor 6, so that the speed sensor 6 transmits information to the external device. The user can obtain the speed feedback of the inner rotor motor 1 based on the change of the pulse. During long-term use, the rotation of the fan blade 4 can accelerate the internal air flow and reduce the internal temperature. Moreover, when the temperature of the sensing metal plate 5 is too high, the speed sensor 6 only senses the number of times the sensing metal plate 5 passes through the inner rotor motor 1, so that the high temperature will not affect the measurement. At the same time, the vibration damper 712 reduces the vibration generated by the inner rotor motor 1, reduces the impact on the working layer of the speed sensor 6, and makes the measurement results more reliable.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A structural device for realizing speed feedback of an AC internal rotor motor, comprising an internal rotor motor (1), a cylinder (2), and a motor mounting plate (3) for mounting the internal rotor motor (1), characterized in that, The surface of the inner rotor motor (1) is connected to one end of the motor mounting plate (3), and the other end of the motor mounting plate (3) is connected to the cylinder (2). The cylinder (2) is sleeved on the surface of the inner rotor motor (1). The output end of the inner rotor motor (1) is provided with a fan blade (4) and a sensing metal plate (5) for feedback of the speed of the inner rotor motor (1). The speed motor is provided with a speed sensor (6) for feedback of the speed of the inner rotor motor (1) and a mounting assembly (7) that cooperates with the sensing metal plate (5). The speed sensor (6) is mounted on the inner rotor motor (1) through the mounting assembly (7).

2. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 1, characterized in that, The mounting assembly (7) includes a shock-absorbing structure (71), a support frame (72), and a nut (73). The shock-absorbing structure (71) is mounted on the inner rotor motor (1), the support frame (72) is mounted on the shock-absorbing structure (71), and the nut (73) is mounted on the support frame (72). The surface of the speed sensor (6) is threadedly connected to the nut (73).

3. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 2, characterized in that, The shock absorption structure (71) includes a fixed plate (711), a shock absorber (712) and a connecting plate (713). The fixed plate (711) is connected to the inner rotor motor (1). The two ends of the shock absorber (712) are connected to the connecting plate (713) and the fixed plate (711) respectively. The connecting plate (713) is connected to the support frame (72).

4. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 1, characterized in that, The connection between the internal rotor motor (1) and the motor mounting plate (3) is a detachable connection.

5. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 1, characterized in that, A connector (8) is provided on the surface of the cylinder (2), and the connector (8) is electrically connected to the speed sensor (6) and the inner rotor motor (1).

6. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 1, characterized in that, The inner wall of the cylinder (2) is detachably fitted with a pair of barriers (9) for blocking garbage, and the fan blade (4) and speed sensor (6) are located between the barriers (9).

7. The structural device for realizing speed feedback of an AC internal rotor motor according to claim 1, characterized in that, The cylinder (2) is provided with mounting holes (10) for mounting the cylinder (2), and the number of mounting holes (10) is several, and the mounting holes (10) are evenly distributed on the cylinder (2).

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