A high performance fan motor structure

By using brushless DC motors and monitoring mechanisms in fan motors, efficient energy conversion and dynamic performance are achieved, and the problems of slow torque response and noise vibration of traditional fan motors are solved, providing efficient motor status monitoring and fault warning functions.

CN118316271BActive Publication Date: 2024-12-10MINZHUO ELECTRIC CO LTD
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Patent Information

Application Number
CN202410357157.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-27
Publication Date
2024-12-10
Estimated Expiration
2044-03-27

AI Technical Summary

Technical Problem

The torque response of traditional fans is relatively slow, making it difficult to achieve low speed range and high precision control, there are noise and vibration problems, and it is impossible to monitor the motor operating status, affecting efficiency and fault prediction.

Method used

Brushless DC motors and monitoring mechanisms are adopted, including current sensors, speed sensors and temperature sensors, combined with performance monitoring systems, through data acquisition, processing and evaluation modules, the motor efficiency is monitored and predicted in real time and alarm faults are promptly reported.

Benefits of technology

It improves energy conversion efficiency, reduces energy consumption, realizes rapid speed adjustment, reduces noise and vibration, provides dynamic performance, promptly detects motor failures, and improves usage efficiency.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The present invention discloses a high-performance fan motor structure, including a fan casing, a side box and a motor, wherein the side box is arranged on the side of the casing, and the motor is arranged inside the side box, and the motor includes a rotor, a stator, a magnet, a coil and a rotating shaft, wherein the rotor is sleeved on one end of the stator, and the stator is provided with a groove on the part inside the rotor, and the coil is wound on the groove, the magnet is arranged in contact with the inner wall of the rotor, and the rotating shaft is passed through the middle of the rotor. The present invention uses a brushless DC motor in the fan, which improves the energy conversion efficiency. At the same time, the brushless DC motor has a wide speed range, can operate at higher speed and lower speed, and can quickly adjust the speed. The brushless DC motor can quickly adjust the torque and speed to cope with transient load changes, and provide better dynamic performance. Since the brushless DC motor does not have a traditional mechanical commutator and carbon brushes, the noise and vibration are reduced.
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Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a high-performance fan motor structure. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine, usually composed of blades and motors. Fans can be used to circulate air, increase air flow, and reduce indoor temperature and humidity. Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] Among them, the motor in the fan is the driving force of the fan, which is used to drive the blades to rotate and generate airflow. The motor usually adopts an AC motor or a DC motor, which plays the role of rotating the blades in the fan. In boilers and industrial furnaces, blowers are usually used to provide the oxygen required for combustion and send air into boilers or industrial furnaces. Traditional blowers usually use AC induction motors. AC induction motors usually use three-phase power supply and generate torque through the action of rotating magnetic field, thereby driving the fan impeller to rotate. However, the torque response of AC induction motors is relatively slow, and it takes a long time to reach the rated torque. It is difficult to achieve a lower speed range and high precision control. The operating frequency is high, which will generate noise and vibration. Most existing fan motors cannot monitor the operating status of the motor, and cannot predict the efficiency of the motor through input current, speed and temperature, so that users cannot judge the performance of the motor by the efficiency of the motor and cannot predict motor failures. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides a high-performance fan motor structure.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A high-performance fan motor structure, comprising a fan housing, a side box and a motor, wherein an air suction port is provided on one side of the fan housing, a fan blade is provided inside the fan housing, the fan blade is arranged at the air suction port, and an air outlet is provided on the side of the fan housing adjacent to the air suction port; a side box is provided on the side opposite to the air suction port of the fan housing, a partition is provided in the middle of the side box, the motor is arranged on the upper surface of the partition, the motor comprises a rotor, a stator, a magnet, a coil and a rotating shaft, the rotor is sleeved on one end of the stator, a groove is provided on the part of the stator inside the rotor, a coil is wound on the groove, the magnet is arranged in contact with the inner wall of the rotor, the rotating shaft is penetrated in the middle of the rotor, one end of the rotating shaft extends out of the rotor, and the end of the rotating shaft extending out of the rotor is connected to drive the fan blade; a monitoring mechanism is provided in the side box, the monitoring mechanism is electrically connected to the motor and the fan, the monitoring mechanism is arranged at the bottom of the side box, and the monitoring mechanism comprises a current sensor, a speed sensor and a temperature sensor; the motor is a brushless DC motor.

[0007] Preferably, the fan casing and the bottom of the side box are provided with universal wheels.

[0008] Preferably, a clip is provided on the rotating shaft, and the clip is provided on the outer surface of the rotor.

[0009] Preferably, the monitoring mechanism also includes a performance monitoring system, which includes a data acquisition module, a data processing module, a performance evaluation module and an abnormality monitoring and alarm module, wherein: the data acquisition module and the data processing module are unidirectionally connected, the data processing module and the performance evaluation module are unidirectionally connected, and the performance evaluation module and the abnormality monitoring and alarm module are unidirectionally connected.

[0010] Preferably, the data acquisition module acquires input current data of the motor through the current sensor, acquires speed data of the motor through the speed sensor, acquires temperature data of the motor during operation through the temperature sensor, and acquires motor fault sample data.

[0011] Preferably, the input end of the data processing module is connected to the output end of the data acquisition module, and the data processing module processes the collected input current, speed and temperature data, extracts the input current waveform characteristics, speed change trend characteristics and temperature change characteristics of the motor, and uses a decision tree to classify the above characteristics.

[0012] Preferably, the output end of the data processing module is connected to the input end of the performance evaluation module, and the performance evaluation module organizes the extracted input current waveform characteristics, speed change trend and temperature change characteristics of the motor through statistical analysis to obtain the relationship and change trend between the characteristic data; according to the collected input current, speed and torque of the motor itself, the system calculates the input power and output power of the motor through the calculation formula of the motor input power and output power, and then calculates the real-time motor efficiency, and manually marks a small part of the data from the collected input current, speed and temperature data and motor efficiency as labeled data, and uses the marked labeled data to train an initial A supervised learning model is constructed, and unlabeled data is input for model evaluation. If the evaluation finds that the prediction is inaccurate, the model is optimized, and then the input current, speed and temperature data collected within a certain period of time are input to predict the efficiency of the motor within a certain period of time and obtain the efficiency prediction curve function Y(t) within a certain period of time; the average efficiency value Y1 of the motor is set, and the average error between the efficiency average value and the actual efficiency on the efficiency prediction curve is calculated by the integral method. The absolute value of the average error is compared with the set error threshold range {0, x} (x>0). If it is within the error threshold range, the motor is working normally. If it is greater than x, the motor may fail during operation, where:

[0013] Input power = input current × voltage;

[0014] Output power = torque × speed / 9.55 (torque is the torque of the motor itself);

[0015] Efficiency = output power / input power;

[0016] in, (t1 is the start time of the collection, t2 is the end time of the collection).

[0017] Preferably, the output end of the performance evaluation module is connected to the input end of the abnormal monitoring and alarm module. When a motor failure is received, the system records the failure time of the motor and informs the user through sound and message that the motor may have a failure, reminding the user to inspect the motor in advance.

[0018] The beneficial effects of the present invention are as follows: the present invention provides a high-performance fan motor structure, which has a higher energy conversion efficiency by setting a brushless DC motor, and can more effectively convert electrical energy into mechanical energy. This can reduce energy consumption and improve overall efficiency for ventilation and induced draft devices of boilers and industrial furnaces. The brushless DC motor has a wide speed range, can operate at higher and lower speeds, and can quickly adjust the speed. The brushless DC motor has a faster response speed, can quickly adjust the torque and speed to cope with transient load changes, and provide better dynamic performance. The brushless DC motor has no traditional mechanical commutator and carbon brushes, which reduces noise and vibration and can achieve quieter operation. The brushless DC motor has no brushes, which can reduce losses and does not require frequent replacement of brushes. At the same time, the monitoring mechanism in the side box can predict the efficiency of the motor and alarm when the motor fails, so that the user can discover and deal with it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a high-performance fan motor structure fan of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a side box of a high-performance fan motor structure of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a high-performance fan motor structure motor of the present invention;

[0022] Figure 4 A cross-sectional view of a high-performance fan motor structure motor of the present invention;

[0023] Figure 5 The system block diagram of a high-performance fan motor structure performance monitoring system of the present invention.

[0024] 1-fan casing; 2-side box; 3-motor; 301-rotor; 302-stator; 303-magnet; 304-coil; 305-rotating shaft; 306-slot; 307-clip; 4-monitoring mechanism; 5-air inlet; 6-fan blades; 7-air outlet; 8-universal wheel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figure 1-4 The present invention provides a high-performance fan motor 3 structure, comprising a fan housing 1, a side box 2 and a motor 3, wherein an air inlet 5 is provided on one side of the fan housing 1, a fan blade 6 is provided inside the fan housing 1, and the fan blade 6 is provided at the air inlet 5, and an air outlet 7 is provided on the side of the fan housing 1 adjacent to the air inlet 5;

[0028] A side box 2 is provided on the fan housing 1 on the side opposite to the air inlet 5, a partition is provided in the middle of the side box 2, the motor 3 is provided on the upper surface of the partition, the motor 3 is a brushless DC motor 3, the motor 3 includes a rotor 301, a stator 302, a magnet 303, a coil 304 and a rotating shaft 305, the rotor 301 is sleeved on one end of the stator 302, the stator 302 is provided with a groove 306 on the part inside the rotor 301, the groove 306 is wound with a coil 304, the The magnet 303 is arranged in contact with the inner wall of the rotor 301, the rotating shaft 305 is arranged in the middle of the rotor 301, one end of the rotating shaft 305 extends out of the rotor 301, and the end of the rotating shaft 305 extending out of the rotor 301 is connected to drive the fan blade 6; a clip 307 is arranged on the rotating shaft 305, and the clip 307 is arranged on the outer surface of the rotor 301, and the clip 307 is used to fix the rotating shaft 305; the fan housing 1 and the bottom of the side box 2 are provided with a universal wheel 8;

[0029] A monitoring mechanism 4 is provided in the side box 2, the monitoring mechanism 4 is electrically connected to the motor 3 and the fan, the monitoring mechanism 4 is provided at the bottom of the side box 2, the monitoring mechanism 4 includes a current sensor, a speed sensor and a temperature sensor, and the monitoring mechanism 4 is used to monitor the running state of the motor 3 and alarm for a fault of the motor 3;

[0030] like Figure 5 The monitoring mechanism 4 also includes a performance monitoring system, which includes a data acquisition module, a data processing module, a performance evaluation module, and an abnormality monitoring and alarm module. Among them: the data acquisition module is unidirectionally connected to the data processing module, the data processing module is unidirectionally connected to the performance evaluation module, and the performance evaluation module is unidirectionally connected to the abnormality monitoring and alarm module. Among them:

[0031] The data acquisition module collects input current data of the motor 3 through the current sensor, collects speed data of the motor 3 through the speed sensor, collects temperature data of the motor 3 during operation through the temperature sensor, and collects fault sample data of the motor 3;

[0032] The input end of the data processing module is connected to the output end of the data acquisition module, and the data processing module processes the collected input current, speed and temperature data, extracts the input current waveform characteristics, speed change trend characteristics and temperature change characteristics of the motor 3, and uses a decision tree to classify the above characteristics; the output end of the data processing module is connected to the input end of the performance evaluation module, and the output end of the data processing module is connected to the input end of the performance evaluation module. The performance evaluation module organizes the extracted input current waveform characteristics, speed change trend and temperature change characteristics of the motor 3 through statistical analysis to obtain the relationship and change trend between the characteristic data; according to the collected input current, speed and torque of the motor itself, the system calculates the input power and output power of the motor 3 through the calculation formula of the input power and output power of the motor 3, and then calculates the real-time The efficiency of motor 3 is to manually mark a small part of the collected input current, speed and temperature data and motor efficiency as labeled data, use the marked labeled data to train an initial supervised learning model, input unlabeled data for model evaluation, and if the evaluation finds that the prediction is inaccurate, optimize the model, and then input the input current, speed and temperature data collected in a certain period of time, predict the efficiency of motor 3 in a certain period of time and obtain the efficiency prediction curve function Y(t) in a certain period of time; set the efficiency average value Y1 of motor 3, use the integral method to calculate the average error between the efficiency average value and the actual efficiency on the efficiency prediction curve, and compare the absolute value of the average error with the set error threshold range {0, x} (x>0). If it is within the error threshold range, the motor is working normally. If it is greater than x, the motor may fail during operation, where:

[0033] Input power = input current × voltage;

[0034] Output power = torque × speed / 9.55 (torque is the torque of the motor itself);

[0035] Efficiency = output power / input power;

[0036] in, (t1 is the start time of the collection, t2 is the end time of the collection).

[0037] As an alternative to the above scheme, the prediction of motor failure can be carried out by inputting the input current, speed and temperature data collected within a certain period of time into the model, predicting the efficiency of motor 3 within a certain period of time and obtaining a set of efficiency prediction values ​​with a sample size of 4000 within a certain period of time, subtracting the 4000 efficiency prediction values ​​from the set efficiency average value Y1 and taking the absolute value to obtain the efficiency error, calculating the average value of the efficiency error and comparing it with the set error threshold. If it is within the error threshold range, the motor is working normally. If it is not within the error threshold range, the motor may fail during operation.

[0038] The output end of the performance evaluation module is connected to the input end of the abnormal monitoring and alarm module. When receiving a signal that the motor 3 has failed, the system records the failure time of the motor 3 and informs the user through sound and message that the motor 3 may have failed, reminding the user to perform early maintenance on the motor 3.

[0039] During use, the performance monitoring system can predict the failure time of the brushless DC motor in the fan, and can also send the performance of the brushless DC motor to the user. When the brushless DC motor may fail, the user can be reminded of the possible failure time of the brushless DC motor through sound or information, so that the user can check and repair the brushless DC motor in time.

[0040] The present invention provides a high-performance fan motor structure. The device has a high energy conversion efficiency by arranging a brushless DC motor, and can more effectively convert electrical energy into mechanical energy. This can reduce energy consumption and improve overall efficiency for ventilation and induced draft devices of boilers and industrial furnaces. The brushless DC motor has a wide speed range, can operate at higher speeds and lower speeds, and can quickly adjust the speed. The brushless DC motor has a fast response speed, can quickly adjust the torque and speed to cope with transient load changes, and provide better dynamic performance. The brushless DC motor has no traditional mechanical commutator and carbon brushes, which reduces noise and vibration and can achieve quieter operation. The brushless DC motor has no brushes, which can reduce losses and does not require frequent replacement of brushes. At the same time, the monitoring mechanism 4 in the side box 2 can predict the efficiency of the motor 3 and alarm when the motor 3 fails, so that the user can discover and deal with it in time.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A high performance fan motor structure, characterized in that: The invention comprises a fan casing (1), a side box (2) and a motor (3); an air inlet (5) is provided on one side of the fan casing (1); a fan blade (6) is provided inside the fan casing (1); the fan blade (6) is arranged at the air inlet (5); an air outlet (7) is provided on the side of the fan casing (1) adjacent to the air inlet (5); a side box (2) is provided on the side of the fan casing (1) opposite to the air inlet (5); a partition is provided in the middle of the side box (2); the motor (3) is arranged on the upper surface of the partition; the motor (3) comprises a rotor (301), a stator (302), a magnet (303), a coil (304) and a rotating shaft (305); the rotor (301) is sleeved on one end of the stator (302); the stator (302) is A groove (306) is provided on the inner part of the rotor (301), a coil (304) is wound on the groove (306), the magnet (303) is arranged in contact with the inner wall of the rotor (301), the rotating shaft (305) is arranged through the middle of the rotor (301), one end of the rotating shaft (305) extends out of the rotor (301), and the end of the rotating shaft (305) extending out of the rotor (301) is connected to drive the fan blade (6); a monitoring mechanism (4) is provided in the side box (2), the monitoring mechanism (4) is electrically connected to the motor (3) and the fan, the monitoring mechanism (4) is arranged at the bottom of the side box (2), and the monitoring mechanism (4) comprises a current sensor, a rotation speed sensor and a temperature sensor; the motor (3) is a brushless DC motor; The monitoring mechanism (4) further comprises a performance monitoring system, which comprises a data acquisition module, a data processing module, a performance evaluation module and an abnormality monitoring and alarm module, wherein: the data acquisition module is unidirectionally connected to the data processing module, the data processing module is unidirectionally connected to the performance evaluation module, and the performance evaluation module is unidirectionally connected to the abnormality monitoring and alarm module; The input end of the data processing module is connected to the output end of the data acquisition module. The data processing module performs feature engineering processing on the collected input current, rotation speed and temperature data, uses a decision tree to classify the above features, and extracts the input current waveform features, rotation speed change trend features and temperature change features of the motor (3); the output end of the data processing module is connected to the input end of the performance evaluation module. The performance evaluation module organizes the extracted input current waveform features, rotation speed change trend and temperature change features of the motor (3) through statistical analysis to obtain the relationship and change trend between the feature data; based on the collected input current, rotation speed and torque of the motor itself, the system calculates the input power and output power of the motor through the calculation formula of the motor input power and output power, and then calculates the real-time motor efficiency; from the collected input current , speed and temperature data and a small amount of manually marked data in the motor efficiency are used as labeled data, an initial supervised learning model is trained using the marked labeled data, and unlabeled data is input for model evaluation. If the evaluation finds that the prediction is inaccurate, the model is optimized, and then the input current, speed and temperature data collected within a certain period of time are input to predict the efficiency of the motor (3) within a certain period of time and obtain the efficiency prediction curve function Y(t) within a certain period of time; the efficiency average value Y1 of the motor (3) is set, and the average error between the efficiency average value and the actual efficiency on the efficiency prediction curve is calculated using the integral method, and the absolute value of the average error obtained is compared with the set error threshold range {0, x} (x>0). If it is within the error threshold range, the motor is working normally. If it is greater than x, the motor (3) may fail during operation, wherein: Input power = input current × voltage; Output power = torque × speed / 9.55, where torque is the torque of the motor itself; Efficiency = output power / input power; in, t1 is the start time of the acquisition, and t2 is the end time of the acquisition.

2. A high performance fan motor structure according to claim 1, characterized in that: Universal wheels (8) are provided at the bottom of the fan housing (1) and the side box (2).

3. A high performance fan motor structure according to claim 1, characterized in that: The rotating shaft (305) is provided with a clip (307), and the clip (307) is arranged on the outer surface of the rotor (301).

4. A high performance fan motor structure according to claim 1, characterized in that: The data acquisition module acquires input current data of the motor (3) through the current sensor, acquires rotation speed data of the motor (3) through the rotation speed sensor, acquires temperature data of the motor (3) during operation through the temperature sensor, and acquires fault sample data of motors (3) of various models through the Internet.

5. A high performance fan motor structure according to claim 1, characterized in that Said: The output end of the performance evaluation module is connected to the input end of the abnormal monitoring and alarm module. When receiving a signal that the motor (3) has failed, the system records the time of the failure of the motor (3) and informs the user of the possible failure of the motor (3) through sound and message, reminding the user to perform early maintenance on the motor (3).