Variable frequency motor structure with infrared temperature measurement

Abstract

The utility model discloses a variable frequency motor structure with infrared temperature measurement relates to variable frequency motor technical field. This variable frequency motor structure with infrared temperature measurement, including motor stator cavity, motor rotor and its permanent magnet, infrared sensor and control chip. This variable frequency motor structure with infrared temperature measurement adopts the structure of infrared sensor and controller integrated design, is built -in in the motor, realizes the non -contact monitoring to the rotor temperature, avoided the traditional contact type sensor in high temperature, vibration and electromagnetic interference environment and easily failure, leads to data drift or equipment damage, and constructs closed -loop feedback mechanism in motor stator cavity simultaneously, makes variable frequency algorithm can be based on real -time temperature data automatic optimization output frequency, current etc. parameter, restrains temperature rise anomaly.

Description

Technical Field

[0001] This utility model relates to the field of variable frequency motor technology, specifically a variable frequency motor structure with infrared temperature measurement. Background Technology

[0002] With the increasing demand for industrial automation and energy conservation and emission reduction, variable frequency motors are widely used in manufacturing, energy, transportation and other fields due to their high-efficiency speed regulation characteristics. Their structure integrates electromagnetic design optimization, high-performance insulation materials and heat dissipation systems to adapt to the needs of multiple scenarios.

[0003] In existing variable frequency motor structures, some use contact sensors such as thermocouples and thermistors embedded in the motor windings or stator to monitor the internal temperature. However, their signal transmission is susceptible to high temperatures and electromagnetic interference, and the wiring is complex. Other motors use handheld infrared thermometers for surface temperature detection, but these external infrared devices cannot penetrate the motor casing to directly monitor the internal rotor; they can only indirectly estimate the internal temperature through heat conduction, resulting in limited accuracy. To address these shortcomings, this invention provides a variable frequency motor structure with infrared temperature measurement to solve the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a variable frequency motor structure with infrared temperature measurement, which solves the problems of signal transmission being easily affected by high temperature and electromagnetic interference when using thermocouples and thermistors to monitor the internal temperature of motors, as well as the complex wiring and the limitations of handheld infrared thermometers for detecting motor surface temperature, where external infrared devices cannot penetrate the motor casing to directly monitor the internal rotor and can only indirectly estimate the internal temperature through heat conduction, resulting in limited accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable frequency motor structure with infrared temperature measurement, comprising:

[0006] The motor stator cavity contains a motor drive circuit board.

[0007] The motor rotor and its permanent magnet are housed within the motor stator cavity;

[0008] An infrared sensor, mounted on the motor drive circuit board, is used for non-contact temperature monitoring of the motor rotor and its permanent magnet.

[0009] Preferably, the motor drive circuit board is fixedly connected to the three-phase terminals of the brushless motor.

[0010] Preferably, the three-phase terminals of the brushless motor's three-phase terminals are provided with the three-phase windings of the motor stator coil.

[0011] Preferably, a bearing column is fixedly connected to the inner wall of the motor stator cavity, and the motor rotor and its permanent magnet are rotatably connected to the bearing column.

[0012] Preferably, the variable frequency motor structure with infrared temperature measurement also includes a control chip, which is disposed on the motor drive circuit board, and the control chip is electrically connected to the infrared sensor.

[0013] Preferably, the motor drive circuit board, infrared sensor and control chip are configured into a closed-loop feedback mechanism, which facilitates the frequency conversion algorithm to automatically optimize the output frequency based on real-time temperature data.

[0014] Preferably, the motor rotor and its permanent magnet work in concert with the motor stator coils to achieve electromechanical energy conversion.

[0015] Its beneficial effects are as follows:

[0016] 1. The structure of this variable frequency motor with infrared temperature measurement adopts an integrated design of infrared sensor and controller, which is built into the motor to realize non-contact monitoring of rotor temperature. This avoids the failure of traditional contact sensors in high temperature, vibration and electromagnetic interference environments, which can lead to data drift or equipment damage.

[0017] 2. The variable frequency motor structure with infrared temperature measurement has a closed-loop feedback mechanism built in the motor stator cavity, which enables the variable frequency algorithm to automatically optimize output frequency, current and other parameters based on real-time temperature data, and suppress abnormal temperature rise. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 1. Motor stator cavity; 2. Motor drive circuit board; 3. Infrared sensor; 4. Three-phase terminals of brushless motor; 5. Control chip; 6. Motor rotor and its permanent magnet; 7. Bearing column; 8. Motor stator coil. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This application provides a variable frequency motor structure with infrared temperature measurement, which solves the problems of signal transmission being easily affected by high temperature and electromagnetic interference when using thermocouples and thermistors to monitor the internal temperature of a motor, as well as the complex wiring and the limitations of handheld infrared thermometers for detecting the surface temperature of the motor, where external infrared devices cannot penetrate the motor casing to directly monitor the internal rotor and can only indirectly estimate the internal temperature through heat conduction, resulting in limited accuracy. The solution is to use an integrated design of an infrared sensor 3 and a controller, built into the motor, to achieve non-contact monitoring of the rotor temperature. This avoids the susceptibility of traditional contact sensors to failure in high temperature, vibration, and electromagnetic interference environments, which can lead to data drift or equipment damage. Simultaneously, a closed-loop feedback mechanism is constructed within the motor stator cavity 1, enabling the variable frequency algorithm to automatically optimize output frequency, current, and other parameters based on real-time temperature data, suppressing abnormal temperature rise.

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] This utility model embodiment discloses the structure of a variable frequency motor with infrared temperature measurement.

[0025] According to the appendix Figure 1 As shown, it includes:

[0026] The motor stator cavity 1 contains a motor drive circuit board 2. The motor stator cavity 1 serves as a support structure for the stator assembly, providing mechanical strength and electromagnetic shielding. It houses the motor rotor, its permanent magnet 6, and the magnetic field generated by the motor stator coil 8. The motor stator cavity 1 is connected to the frame and supports the rotation of the motor rotor and its permanent magnet 6 through the bearing column 7.

[0027] The motor rotor and its permanent magnet 6 are disposed in the motor stator cavity 1. The permanent magnet is embedded in the rotor core to form an alternating N / S pole arrangement.

[0028] Infrared sensor 3 is mounted on motor drive circuit board 2. Infrared sensor 3 is used to perform non-contact temperature monitoring of motor rotor and its permanent magnet 6.

[0029] The control chip 5 is located on the motor drive circuit board 2. The control chip 5 is electrically connected to the infrared sensor 3. The control chip 5 is the core of the motor control algorithm. It processes sensor data and generates drive signals. The control chip 5 can communicate with the motor drive circuit board 2 and receive feedback signals from the infrared sensor 3 to adjust the motor's operating status.

[0030] The motor drive circuit board 2 is fixedly connected to the brushless motor three-phase terminal 4, which facilitates the connection between the motor drive circuit board 2 and the motor stator coil 8 to realize the input of three-phase current.

[0031] The three-phase terminals of the three-phase terminal 4 of the brushless motor are equipped with the three-phase windings of the motor stator coil 8.

[0032] A bearing column 7 is fixedly connected to the inner wall of the motor stator cavity 1, and the motor rotor and its permanent magnet 6 are rotatably connected to the bearing column 7.

[0033] The motor drive circuit board 2, infrared sensor 3, and control chip 5 form a closed-loop feedback mechanism, which facilitates the frequency conversion algorithm to automatically optimize the output frequency based on real-time temperature data. The infrared sensor 3, control chip 5, and motor drive circuit board 2 are the core components of this closed-loop feedback mechanism. Through the coordinated operation of "detection-decision-execution," they achieve real-time monitoring and dynamic adjustment of the motor status, ensuring stable and efficient system operation.

[0034] The motor rotor and its permanent magnet 6 work together with the motor stator coil 8 to achieve electromechanical energy conversion.

[0035] This invention proposes a variable frequency motor structure with infrared temperature measurement, which is built into the motor stator cavity 1 and connected to the motor drive circuit board 2 via the three-phase terminals 4 of the brushless motor. Several infrared sensors 3 are added to achieve real-time monitoring of the rotor temperature. The working process is as follows: First, the motor drive circuit board 2 is powered by an external power supply. The control chip 5, through the FOC algorithm, systematically powers the three-phase terminals 4 of the brushless motor. The three-phase terminals are connected to the motor stator coils 8 inside the motor stator cavity 1. At this time, current flows regularly through the three-phase stator coils, and the motor rotor and its permanent magnets 6 are regularly subjected to magnetic force, achieving continuous rotation. This drives the bearing column 7 to rotate, and the fan blades (load) connected to the bearing column 7 rotate synchronously. Meanwhile, the infrared sensors 3 of the motor drive circuit board 2 monitor the rotor permanent magnets directly below in real time, and the control chip 5 filters and analyzes the collected infrared data to calculate the rotor temperature.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A variable frequency motor structure with infrared temperature measurement, characterized in that, include: The motor stator cavity (1) contains a motor drive circuit board (2). The motor rotor and its permanent magnet (6) are disposed inside the motor stator cavity (1); An infrared sensor (3) is mounted on the motor drive circuit board (2). The infrared sensor (3) is used to perform non-contact temperature monitoring of the motor rotor and its permanent magnet (6).

2. The variable frequency motor structure with infrared temperature measurement according to claim 1, characterized in that, The motor drive circuit board (2) is fixedly connected to the three-phase terminals (4) of the brushless motor.

3. The variable frequency motor structure with infrared temperature measurement according to claim 2, characterized in that, The three-phase terminals of the brushless motor three-phase terminal block (4) are provided with the three-phase windings of the motor stator coil (8).

4. The variable frequency motor structure with infrared temperature measurement according to claim 1, characterized in that, The motor stator cavity (1) is fixedly connected to the inner wall of the bearing column (7), and the motor rotor and its permanent magnet (6) are rotatably connected to the bearing column (7).

5. The variable frequency motor structure with infrared temperature measurement according to claim 1, characterized in that, The variable frequency motor structure with infrared temperature measurement also includes a control chip (5), which is set on the motor drive circuit board (2), and the control chip (5) is electrically connected to the infrared sensor (3).

6. The variable frequency motor structure with infrared temperature measurement according to claim 1, characterized in that, The motor drive circuit board (2), infrared sensor (3) and control chip (5) form a closed-loop feedback mechanism, which facilitates the frequency conversion algorithm to automatically optimize the output frequency based on real-time temperature data.

7. The variable frequency motor structure with infrared temperature measurement according to claim 3, characterized in that, The motor rotor and its permanent magnet (6) work together with the motor stator coil (8) to achieve electromechanical energy conversion.

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