Motor rotating speed regulation and control system

Abstract

The invention discloses a motor rotating speed regulation and control system, and relates to the technical field of motor rotating speed regulation and control, which comprises the steps of analyzing the rotating speed of a motor to obtain a rotating speed error, calculating a rotating speed regulation and control evaluation index of a target motor, facilitating the prevention of an unstable condition caused by the rotating speed error of the system, and analyzing the rotating speed regulation and control response time. The response coincidence index of the target motor is calculated, the response time directly affects the performance and the application range of the motor control system, the rotating speed regulation response time of the motor and the vibration signal are analyzed, the rotating speed regulation evaluation characterization value of the target motor is calculated, and data support is provided for rotating speed regulation analysis prompt of the target motor. And the rotating speed control data is analyzed, so that the motor rotating speed regulation and control system can utilize energy more effectively, the energy waste is reduced to the greatest extent, and the motor rotating speed regulation and control are promoted to have a remarkable progress in the sustainable aspect.

Description

Technical Field

[0001] The invention relates to the technical field of speed control, and in particular to a motor speed control system. Background Art

[0002] With the development of motor technology and the continuous evolution of various industries, the demand for motor speed control has become increasingly significant. The demand for motor speed control is rooted in the rise of industrial automation. In manufacturing and factory automation, flexible control of motor operating speed is a necessary condition for efficient production. By adjusting the speed of the motor, the production line can adapt to different process requirements and achieve flexibility and diversification of the production process. Energy efficiency is an important driving force behind motor speed control. By accurately controlling the motor speed, the system can use energy more effectively and minimize energy waste. The advantage of motor speed control lies in its efficient use of energy, which in turn promotes significant progress in sustainability and environmental protection in various industries.

[0003] For example, the invention patent with publication number: CN115765307A discloses a speed feedback control motor control system, including a motor housing and an output shaft, wherein the output shaft is installed inside the motor housing to output motor power, and the upper end of the output shaft penetrates the upper surface of the motor housing, and a motor control module is arranged inside the motor housing to control the speed of the motor, the lower end of the output shaft is rotatably installed inside the motor housing, and a speed detection mechanism is connected to the outer side of the output shaft to detect the actual output speed of the output shaft. The speed feedback control motor control system can detect the speed of the output shaft in real time through the speed detection mechanism arranged on the output shaft, and detect the difference between the actual speed of the output shaft and the set speed through its speed feedback, and the subsequent movement of the movable shaft can change the speed transmitted to the output shaft by the movable shaft, thereby changing the torque of the output shaft, which is convenient for adapting the output shaft to work under different loads.

[0004] Based on the above scheme, it can be seen that there are still some shortcomings in the current motor speed control, which are specifically reflected in the following aspects: (1) The current motor speed control lacks consideration of motor operation factors. For example, the speed error is obtained by analyzing the speed of the target motor. The speed error has a great influence on the motor speed control. A large speed error may cause system instability, especially in applications that require precise control. In addition, a large speed may cause system oscillation and reduce the stability of the speed control system. The lack of monitoring of speed overshoot will seriously affect the stability of the motor speed control.

[0005] (2) The current analysis method for motor speed control is not comprehensive enough. It only evaluates the motor speed from a single perspective. The evaluation from a single perspective will lead to a lack of accuracy in motor speed control, resulting in hidden dangers in the motor speed control system. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a motor speed control system, which can effectively solve the problems involved in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a motor speed control system, including a motor speed analysis module, for analyzing the speed of a target motor, calculating a speed control evaluation index of the target motor, and matching the speed control evaluation characterization threshold of the target motor.

[0008] The motor speed control module is used to analyze and evaluate the speed control of the target motor, calculate the speed control evaluation characterization value of the target motor, and provide data support for the speed regulation analysis prompts of the target motor.

[0009] The second aspect of the present invention also includes a motor structure database, which uses a speed control evaluation characterization threshold corresponding to each speed control evaluation index interval to store the maximum speed limit value, the maximum current limit value of the target motor speed control, the current reference waveform curve, the line length of the current reference waveform curve, the speed response time limit value, the target motor speed control adaptation vibration frequency and the reference adaptation maximum amplitude, and the rated operating life of the target motor.

[0010] Furthermore, the speed of the target motor is analyzed and the speed control evaluation index of the target motor is calculated. The specific analysis process is: setting a monitoring period, setting a number of monitoring time points in the monitoring period, counting the speed of the target motor at each monitoring time point, and simultaneously obtaining the set rated speed of the target motor and the allowable limit value of the speed error from the motor structure database.

[0011] Calculate the speed control evaluation index of the target motor, and the calculation formula is: Where β represents the speed control evaluation index of the target motor, α represents the speed control stability index of the target motor, N represents the current control evaluation index of the target motor, Q i实 represents the speed of the target motor at the i-th monitoring time point, Q 额 represents the rated speed of the target motor, ΔQ represents the allowable limit value of the speed error, δ1 and δ2 represent the compensation factors corresponding to the set speed control stability index and current control evaluation index respectively, ε1 represents the correction factor of the set speed of the target motor, i represents the number of each monitoring time point, i=1,2,3,...,n, and n represents the total number of monitoring time points.

[0012] Furthermore, the speed control evaluation characterization threshold of the matching target motor is specifically analyzed as follows: the speed control evaluation index of the target motor is matched with the speed control evaluation characterization threshold corresponding to each speed control evaluation index interval stored in the motor structure database to obtain the speed control evaluation characterization threshold of the target motor.

[0013] Furthermore, the speed control stability index of the target motor is specifically analyzed as follows: extracting the speed of the target motor at each monitoring time point in the monitoring cycle, obtaining the maximum limit value of the speed from the motor structure database, and calculating the speed control stability index of the target motor, and the calculation formula is:

[0014]

[0015] In the formula, α represents the speed control stability index of the target motor, Q max Indicates the maximum limit of the target motor speed, Q i实 represents the speed of the target motor at the i-th monitoring time point, ε2 represents the compensation factor of the set speed of the target motor, and ε3 represents the compensation factor of the set maximum speed of the target motor.

[0016] Furthermore, the current control evaluation index of the target motor is specifically analyzed as follows: extract the current of the target motor at each monitoring time point in the monitoring period, construct the current waveform curve of the target motor, and perform a coincidence check with the current reference waveform curve stored in the motor structure database, thereby extracting the length of the line where the current waveform curve of the target motor in the monitoring period coincides, which is recorded as L i重 ;

[0017] Calculate the current control evaluation index of the target motor, and the calculation formula is:

[0018] Where, N is the current control evaluation index of the target motor, I max电 Indicates the maximum current of the target motor during the monitoring cycle, ΔI max Indicates the maximum current limit value of the target motor speed control stored in the motor structure database, L i0 It represents the line length of the current reference waveform curve stored in the motor structure database. φ1 and φ2 represent the set current waveform curve and the correction factor corresponding to the maximum current value. Indicates the compensation factor corresponding to the current control evaluation index of the set target motor.

[0019] Furthermore, the speed control evaluation characterization value of the target motor is calculated by the following specific calculation formula:

[0020] Where, χ represents the speed control evaluation characterization value of the target motor, η 响 , η 频 and η 控 They respectively represent the response compliance index of the target motor, the frequency compliance index of the target motor and the control interference index of the target motor, e represents a natural constant, ξ1, ξ2 and ξ3 represent the weight factors corresponding to the response compliance index, the frequency compliance index and the control interference index, respectively.

[0021] Furthermore, the response compliance index of the target motor is specifically analyzed as follows: the speed control response time of the target motor is counted during the monitoring period, and the set speed response time limit value is obtained from the motor structure database, and the response compliance index of the target motor is calculated, and the calculation formula is:

[0022]

[0023] Where η 响 Indicates the response compliance index of the target motor, T 响 represents the speed control response time of the target motor, ΔT represents the speed response time limit, γ represents the influencing factor corresponding to the unit control response time, μ1 represents the correction factor corresponding to the set speed response time, and κ1 represents the correction factor corresponding to the set response compliance index.

[0024] Furthermore, the frequency compliance index of the target motor is specifically analyzed as follows: monitoring and counting the vibration signal of the target motor during the monitoring period, constructing a spectrum diagram of the vibration signal of the target motor during the monitoring period, performing spectrum analysis, extracting the vibration frequency and the maximum amplitude, and obtaining the target motor speed control adaptation vibration frequency and the reference adaptation maximum amplitude stored in the motor structure database, and calculating the frequency compliance index of the target motor, and the calculation formula is:

[0025]

[0026] Where η 频 Indicates the frequency compliance index of the target motor, P 频 Represents the vibration frequency of the target motor during the monitoring period, P″ 频 Indicates the target motor speed control and vibration frequency, F 辐 Indicates the highest amplitude of the target motor in the monitoring period, F″ 辐 It indicates that the target motor speed control refers to the maximum amplitude of the adaptation, and a1 and a2 respectively represent the correction factors corresponding to the set vibration frequency and the maximum amplitude.

[0027] Furthermore, the control interference index of the target motor is specifically analyzed as follows: the rated operating life of the target motor is obtained from the motor structure database, and the operating time of the target motor and the maintenance time interval between the adjacent regular maintenance time point and the current time point are extracted;

[0028] The control interference index of the target motor is calculated comprehensively, and its calculation expression is:

[0029] Where η 控 represents the control disturbance index of the target motor, ΔT 电 Indicates the rated operating life of the target motor, T 电 Indicates the operating time of the target motor, T 维 Indicates the maintenance time interval between the adjacent scheduled maintenance time point and the current time point. Indicates the correction factor corresponding to the set operation time. Indicates the risk impact factor corresponding to the set unit maintenance time interval.

[0030] Furthermore, the speed regulation analysis prompt for the target motor is provided, and the specific analysis process is: comparing the speed control evaluation characterization value of the target motor with the speed control evaluation characterization threshold of the target motor; if the speed control evaluation characterization value of the target motor is lower than the speed control evaluation characterization threshold of the target motor, then an analysis prompt for the speed regulation of the target motor is provided.

[0031] The present invention has the following beneficial effects:

[0032] (1) The present invention can help the motor speed control system to maintain the desired speed more accurately by analyzing the speed of the target motor to obtain the speed error and the maximum speed, and help prevent the motor speed control system from being unstable due to the speed error, especially in applications requiring high-precision control. Reducing the speed error can improve the speed control accuracy of the system and ensure that the motor runs at the expected speed. A lower speed error means higher control efficiency and less energy waste. Effectively controlling the error can reduce system energy consumption and extend the service life of the motor.

[0033] (2) The present invention calculates the response compliance index of the target motor by analyzing the speed control response time. The speed of the response time directly affects the performance and application scope of the motor control system. A shorter response time helps to reduce the transition process of the system during startup, acceleration or deceleration, so that the motor can reach the desired state more quickly and smoothly, which helps to reduce mechanical vibration and impact and improve the stability of the system. In addition, a fast response time helps the system to respond to external changes more effectively, reduce speed errors, thereby improving energy efficiency. It also helps to reduce the overshoot of the system, avoid excessive oscillation and instability, and provide data support for the subsequent calculation of the speed control evaluation characterization value of the target motor, thereby improving the accuracy of motor speed control.

[0034] (3) The present invention can understand the stability of the system in response to external disturbances by analyzing the vibration frequency. When designing a motor speed control system, it is necessary to ensure that the vibration frequency of the system is distinguished from the operating frequency to avoid resonance effects. Resonance may also cause system instability. By adjusting the control parameters, resonance can be avoided and the stability of the system can be improved.

[0035] (4) The present invention helps prevent potential failures and improve the reliability and stability of the motor speed control system by measuring the length of time it has been put into operation and the maintenance time interval between the adjacent regular maintenance time point and the current time point.

[0036] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of system module connection of the present invention. DETAILED DESCRIPTION

[0038] 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.

[0039] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] See also Figure 1As shown, an embodiment of the present invention provides a technical solution: a motor speed control system, including a motor speed analysis module, for analyzing the speed of a target motor, calculating a speed control evaluation index of the target motor, and matching the speed control evaluation characterization threshold of the target motor.

[0041] The motor speed control module is used to analyze and evaluate the speed control of the target motor, calculate the speed control evaluation characterization value of the target motor, and provide data support for the speed regulation analysis prompts of the target motor.

[0042] The present invention also includes a motor structure database, which uses a speed control evaluation characterization threshold corresponding to each speed control evaluation index interval to store the maximum speed limit value, the maximum current limit value of the target motor speed control, the current reference waveform curve, the line length of the current reference waveform curve, the speed response time limit value, the target motor speed control adaptation vibration frequency and the reference adaptation maximum amplitude, and the rated operating life of the target motor.

[0043] Specifically, the speed of the target motor is analyzed and the speed control evaluation index of the target motor is calculated. The specific analysis process is: setting a monitoring period, setting several monitoring time points in the monitoring period, counting the speed of the target motor at each monitoring time point, and at the same time obtaining the set rated speed of the target motor and the allowable limit value of the speed error from the motor structure database.

[0044] Calculate the speed control evaluation index of the target motor, and the calculation formula is: Where β represents the speed control evaluation index of the target motor, α represents the speed control stability index of the target motor, N represents the current control evaluation index of the target motor, Q i实 represents the speed of the target motor at the i-th monitoring time point, Q 额 represents the rated speed of the target motor, ΔQ represents the allowable limit value of the speed error, δ1 and δ2 represent the compensation factors corresponding to the set speed control stability index and current control evaluation index respectively, ε1 represents the correction factor of the set speed of the target motor, i represents the number of each monitoring time point, i=1,2,3,...,n, and n represents the total number of monitoring time points.

[0045] In this embodiment, a sensor is used to monitor the rotation speed of the motor. For example, a vibration sensor can be used to monitor the vibration frequency of the motor, thereby indirectly inferring the rotation speed.

[0046] In this implementation, the speed is one of the core indicators of motor performance. Higher speed accuracy means that the system can control the output of the motor more accurately. Small speed errors help maintain the stability of the system, especially in applications that require precise control, such as mechanical manufacturing and precision instruments. The size of the speed error directly affects the response speed of the system. Smaller errors usually mean faster system responses because the motor speed control system can detect and correct any deviations more quickly.

[0047] In this embodiment, the size of the speed error will also affect the system's adaptability to load changes. A smaller error enables the system to more quickly and accurately adjust the motor's output to adapt to changes in the load. An excessively large speed error may cause the motor to frequently operate under different loads, which may have an adverse effect on the life of the motor and related components. A smaller error generally helps to extend the life of the system and improve durability. A large speed error may cause the motor system to generate vibration and noise. Therefore, by reducing the error, the vibration and noise levels can be reduced, and the working environment and performance of the motor system can be improved.

[0048] In this embodiment, different applications have different requirements for rotation speed and error. Some high-precision applications, such as medical equipment or precision machining, may have more stringent requirements for rotation speed error, while some industrial applications may have relatively loose requirements.

[0049] In this implementation, by analyzing the speed error and the maximum speed, the motor speed system can be helped to maintain the desired speed more accurately, which helps prevent system instability caused by speed error, especially in applications requiring high-precision control. Reducing the speed error can improve the speed control accuracy of the system and ensure that the motor runs at the expected speed. Lower speed error means higher control efficiency and less energy waste. Effectively controlling the error can reduce system energy consumption and extend the service life of the motor.

[0050] Specifically, the speed control evaluation characterization threshold of the target motor is matched, and the specific analysis process is: the speed control evaluation index of the target motor is matched with the speed control evaluation characterization threshold corresponding to each speed control evaluation index interval stored in the motor structure database to obtain the speed control evaluation characterization threshold of the target motor.

[0051] In this implementation, obtaining the speed control evaluation characterization threshold of the target motor provides data support for subsequent speed regulation analysis prompts of the target motor.

[0052] Specifically, the speed control stability index of the target motor is analyzed as follows: extract the speed of the target motor at each monitoring time point in the monitoring cycle, obtain the maximum limit value of the speed from the motor structure database, and calculate the speed control stability index of the target motor. The calculation formula is:

[0053] In the formula, α represents the speed control stability index of the target motor, Q max Indicates the maximum limit of the target motor speed, Q i实 represents the speed of the target motor at the i-th monitoring time point, ε2 represents the compensation factor of the set speed of the target motor, and ε3 represents the compensation factor of the set maximum speed of the target motor.

[0054] In this implementation, the speed stability value determines the target speed that the motor can maintain during operation. Higher speed stability means that the system can more accurately control the output of the motor. The speed stability of the motor also affects the adaptability of the motor speed control system to load changes. A stable speed can better cope with changes in external loads and ensure that the system can provide stable performance under various working conditions.

[0055] In this implementation, the maximum speed determines the highest speed that the motor can reach in a specific application. For systems that need to handle different operating conditions and loads, motors with higher maximum speeds may be more flexible to adapt to different requirements. Reasonable analysis of the speed stability value and maximum speed helps to optimize the performance of the motor speed control system and ensure that it can operate stably and efficiently under various operating conditions.

[0056] Specifically, the current control evaluation index of the target motor is analyzed as follows: extract the current of the target motor at each monitoring time point in the monitoring cycle, construct the current waveform curve of the target motor, and perform a coincidence check with the current reference waveform curve stored in the motor structure database, thereby extracting the length of the line where the current waveform curve of the target motor in the monitoring cycle coincides, recorded as L i重 .

[0057] Calculate the current control evaluation index of the target motor, and the calculation formula is: Where, N is the current control evaluation index of the target motor, I max电 Indicates the maximum current of the target motor during the monitoring cycle, ΔI max Indicates the maximum current limit value of the target motor speed control stored in the motor structure database, L i0 It represents the line length of the current reference waveform curve stored in the motor structure database. φ1 and φ2 represent the set current waveform curve and the correction factor corresponding to the maximum current value. Indicates the compensation factor corresponding to the current control evaluation index of the set target motor.

[0058] In this embodiment, a current sensor can be used to monitor the current value of the target motor.

[0059] In this implementation scheme, the motor current and the maximum current have an important impact on the motor speed control system. These two parameters are directly related to the motor's power output, heat generation and system stability. The efficiency of the motor is closely related to the current. Therefore, when analyzing the motor speed control system, it is necessary to reduce the current as much as possible while meeting the power demand to improve the system's energy efficiency. The maximum current is usually related to the capacity of the motor and related systems. Ensuring that the current does not exceed the design limit of the system is a key factor in ensuring the safe operation of the system. Current exceeding the maximum value may cause equipment damage, overheating or other unsafe conditions.

[0060] Specifically, the speed control evaluation characterization value of the target motor is calculated, and the specific calculation formula is: Where, χ represents the speed control evaluation characterization value of the target motor, η 响 , η 频 and η 控 They respectively represent the response compliance index of the target motor, the frequency compliance index of the target motor and the control interference index of the target motor, e represents a natural constant, ξ1, ξ2 and ξ3 represent the weight factors corresponding to the response compliance index, the frequency compliance index and the control interference index, respectively.

[0061] Specifically, the response compliance index of the target motor is analyzed as follows: the speed control response time of the target motor is counted during the monitoring period, and the set speed response time limit value is obtained from the motor structure database, and the response compliance index of the target motor is calculated. The calculation formula is:

[0062]

[0063] Where η 响 Indicates the response compliance index of the target motor, T 响 represents the speed control response time of the target motor, ΔT represents the speed response time limit, γ represents the influencing factor corresponding to the unit control response time, μ1 represents the correction factor corresponding to the set speed response time, and κ1 represents the correction factor corresponding to the set response compliance index.

[0064] In this implementation scheme, response time is a key performance indicator. The response time of the speed control system refers to the time required for the system to complete the actual speed adjustment from receiving the speed control command.

[0065] In this implementation, defining an appropriate response time helps to balance fast response and system stability. Too fast a response may introduce oscillation or unstable behavior, while too slow a response may lead to poor system performance. By setting an appropriate response time limit and comparing it with the actual response time, it is possible to meet performance requirements while avoiding excessive energy consumption in response speed and helping to regulate the motor speed.

[0066] In this implementation, the shorter response time enables the motor system to adapt to load changes or changes in speed control commands more quickly. The fast response time helps to ensure that the speed adjustment is more accurate. In applications requiring high-precision control, the fast response time helps to reduce speed control errors. Excessive response time may cause the system to overshoot, that is, exceeding the target value during the adjustment process. Overshoot may cause oscillation or unstable operation. Therefore, care must be taken in the design to avoid excessively long response times. Faster response times help to more effectively manage motor power under changing operating conditions, thereby improving the energy efficiency of the system.

[0067] In this implementation scheme, the speed control response time is analyzed and the response compliance index of the target motor is calculated. The speed of the response time directly affects the performance and scope of application of the motor control system. A shorter response time helps to reduce the transition process of the system during startup, acceleration or deceleration, so that the motor can reach the desired state more quickly and smoothly, which helps to reduce mechanical vibration and shock and improve the stability of the system. In addition, a fast response time helps the system to respond to external changes more effectively, reduce speed errors, thereby improving energy efficiency. It also helps to reduce the overshoot of the system, avoid excessive oscillation and instability, and provides data support for the subsequent calculation of the speed control evaluation characterization value of the target motor, thereby improving the accuracy of motor speed control.

[0068] Specifically, the frequency compliance index of the target motor is analyzed in the following steps: monitor and count the vibration signal of the target motor during the monitoring period, construct a spectrum diagram of the vibration signal of the target motor during the monitoring period, perform spectrum analysis, extract the vibration frequency and the maximum amplitude, and obtain the target motor speed control adaptation vibration frequency and the reference adaptation maximum amplitude stored in the motor structure database, and calculate the frequency compliance index of the target motor. The calculation formula is:

[0069]

[0070] Where η 频 Indicates the frequency compliance index of the target motor, P 频 Represents the vibration frequency of the target motor during the monitoring period, P″ 频 Indicates the target motor speed control and vibration frequency, F 辐 Indicates the highest amplitude of the target motor in the monitoring period, F″辐 It indicates that the target motor speed control refers to the maximum amplitude of the adaptation, and a1 and a2 respectively represent the correction factors corresponding to the set vibration frequency and the maximum amplitude.

[0071] In this embodiment, by analyzing the vibration frequency, potential failures can be predicted and preventive maintenance measures can be taken to avoid equipment downtime and damage. Abnormal maximum amplitudes may indicate possible mechanical problems in the future, so monitoring the amplitude of the motor can detect and solve problems in advance, which helps reduce maintenance costs and production interruptions.

[0072] In this implementation, by comparing the actual vibration frequency with the set value of the target motor speed, the motor system can be adjusted to optimize performance. Monitoring the maximum amplitude can also help adjust the load or system parameters to prevent exceeding the allowable amplitude range. By monitoring the vibration frequency and maximum amplitude, the health status monitoring, fault prediction, performance tuning and real-time feedback control of the motor speed control system can be achieved, thereby improving the reliability, safety and efficiency of the speed control system.

[0073] In this implementation scheme, low-frequency vibration may cause long-period fluctuations in the system, affecting the stability of the system. The system often takes a longer time to respond and adapt to such low-frequency vibrations, which may cause instability in the speed control system. High-frequency vibrations may cause rapid fluctuations in the system, which puts higher requirements on the high-frequency response capability of the system. If the speed control system cannot effectively suppress high-frequency vibrations, it may cause system instability.

[0074] In this embodiment, high-amplitude vibration may affect the performance of the motor, especially in applications with high precision requirements. Vibration may cause fluctuations in speed, thereby affecting the speed regulation accuracy of the system. The vibration frequency may be close to the natural frequency of the system or its multiples, leading to resonance. Resonance may also cause system instability and performance degradation, and may cause fatigue and wear to the mechanical components of the motor, thereby shortening the service life of the equipment. Therefore, regular or frequent vibration may cause fatigue and fracture of components. In summary, the motor speed control system needs to consider the vibration frequency and amplitude in design and operation to ensure the stability, performance and life of the system.

[0075] Specifically, the control interference index of the target motor has a specific analysis process as follows: the rated operating life of the target motor is obtained from the motor structure database, and the operating time of the target motor and the maintenance time interval between the adjacent regular maintenance time point and the current time point are extracted.

[0076] The control interference index of the target motor is calculated comprehensively, and its calculation expression is: Where η 控represents the control disturbance index of the target motor, ΔT 电 Indicates the rated operating life of the target motor, T 电 Indicates the operating time of the target motor, T 维 Indicates the maintenance time interval between the adjacent scheduled maintenance time point and the current time point. Indicates the correction factor corresponding to the set operation time. Indicates the risk impact factor corresponding to the set unit maintenance time interval.

[0077] In this implementation scheme, long-term operation may cause component wear, fatigue and aging, thereby reducing the performance and reliability of the system. The setting of the maintenance time interval affects the reliability and stability of the system. Too long a maintenance interval may result in the equipment not being maintained and repaired in time, increasing the risk of unexpected failures. On the contrary, a reasonable maintenance time interval can ensure that the system operates in an efficient state and reduce unexpected downtime. Analyzing the regular maintenance time helps to ensure the stability of the motor speed control system and the long-term operation safety. At the same time, properly arranging the maintenance time interval can maximize the efficiency and reliability of the system.

[0078] In this implementation, the length of time it has been put into operation and the maintenance time interval between the adjacent scheduled maintenance time point and the current time point can help prevent potential failures and improve the reliability and stability of the motor speed control system.

[0079] Specifically, an analysis prompt for the speed regulation of the target motor is provided, and the specific analysis process is: comparing the speed control evaluation characterization value of the target motor with the speed control evaluation characterization threshold of the target motor; if the speed control evaluation characterization value of the target motor is lower than the speed control evaluation characterization threshold of the target motor, an analysis prompt for the speed regulation of the target motor is provided.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0081] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A motor speed control system, characterized in that include: A motor speed analysis module is used to analyze the speed of the target motor, calculate the speed control evaluation index of the target motor, and match the speed control evaluation characterization threshold of the target motor; The motor speed control module is used to analyze and evaluate the speed control of the target motor, calculate the speed control evaluation characterization value of the target motor, and provide data support for the speed regulation analysis prompts of the target motor.

2. A motor speed control system according to claim 1, characterized in that: The speed of the target motor is analyzed to calculate the speed control evaluation index of the target motor. The specific analysis process is as follows: Set a monitoring cycle, set several monitoring time points in the monitoring cycle, count the speed of the target motor at each monitoring time point, and obtain the rated speed and speed error allowable limit value of the set target motor from the motor structure database; Calculate the speed control evaluation index of the target motor, and the calculation formula is: Where β represents the speed control evaluation index of the target motor, α represents the speed control stability index of the target motor, N represents the current control evaluation index of the target motor, Q i实 represents the speed of the target motor at the i-th monitoring time point, Q 额 represents the rated speed of the target motor, ΔQ represents the allowable limit value of the speed error, δ1 and δ2 represent the compensation factors corresponding to the set speed control stability index and current control evaluation index respectively, ε1 represents the correction factor of the set speed of the target motor, i represents the number of each monitoring time point, i=1,2,3,...,n, and n represents the total number of monitoring time points.

3. A motor speed control system according to claim 1, characterized in that: The speed control evaluation characterization threshold of the matching target motor is specifically analyzed as follows: The speed control evaluation index of the target motor is matched with the speed control evaluation characterization thresholds corresponding to each speed control evaluation index interval stored in the motor structure database to obtain the speed control evaluation characterization threshold of the target motor.

4. A motor speed control system according to claim 2, characterized in that: The speed control stability index of the target motor is analyzed in the following specific process: The speed of the target motor at each monitoring time point in the monitoring cycle is extracted, and the maximum limit value of the speed is obtained from the motor structure database to calculate the speed control stability index of the target motor. The calculation formula is: In the formula, α represents the speed control stability index of the target motor, Q max Indicates the maximum limit of the target motor speed, Q i实 represents the speed of the target motor at the i-th monitoring time point, ε2 represents the compensation factor of the set speed of the target motor, and ε3 represents the compensation factor of the set maximum speed of the target motor.

5. The motor speed control system according to claim 2, characterized in that: The current control evaluation index of the target motor, the specific analysis process is: The current of the target motor at each monitoring time point in the monitoring cycle is extracted, and the current waveform curve of the target motor is constructed. The current waveform curve is checked for overlap with the current reference waveform curve stored in the motor structure database, thereby extracting the length of the line where the current waveform curve of the target motor in the monitoring cycle overlaps, which is recorded as L i重 ; Calculate the current control evaluation index of the target motor, and the calculation formula is: Where, N is the current control evaluation index of the target motor, I max电 Indicates the maximum current of the target motor during the monitoring cycle, ΔI max Indicates the maximum current limit value of the target motor speed control stored in the motor structure database, L i0 It represents the line length of the current reference waveform curve stored in the motor structure database. φ1 and φ2 represent the set current waveform curve and the correction factor corresponding to the maximum current value. Indicates the compensation factor corresponding to the current control evaluation index of the set target motor.

6. The motor speed control system according to claim 1, characterized in that: The speed control evaluation characterization value of the target motor is calculated by the following specific calculation formula: Where, χ represents the speed control evaluation characterization value of the target motor, η 响 , η 频 and η 控 They respectively represent the response compliance index of the target motor, the frequency compliance index of the target motor and the control interference index of the target motor, e represents a natural constant, ξ1, ξ2 and ξ3 represent the weight factors corresponding to the response compliance index, the frequency compliance index and the control interference index, respectively.

7. The motor speed control system according to claim 5, characterized in that: The response of the target motor meets the index, and the specific analysis process is as follows: During the monitoring period, the speed control response time of the target motor is counted, and the set speed response time limit value is obtained from the motor structure database to calculate the response compliance index of the target motor. The calculation formula is: Where η 响 Indicates the response compliance index of the target motor, T 响 represents the speed control response time of the target motor, ΔT represents the speed response time limit, γ represents the influencing factor corresponding to the unit control response time, μ1 represents the correction factor corresponding to the set speed response time, and κ1 represents the correction factor corresponding to the set response compliance index.

8. The motor speed control system according to claim 5, characterized in that: The frequency of the target motor meets the index, and the specific analysis process is as follows: During the monitoring period, the vibration signal of the target motor is monitored and counted, and the vibration signal spectrum of the target motor during the monitoring period is constructed. The spectrum analysis is performed to extract the vibration frequency and the maximum amplitude. The target motor speed control adaptation vibration frequency and the reference adaptation maximum amplitude stored in the motor structure database are obtained, and the frequency compliance index of the target motor is calculated. The calculation formula is: Where η 频 Indicates the frequency compliance index of the target motor, P 频 Represents the vibration frequency of the target motor during the monitoring period, P″ 频 Indicates the target motor speed control and vibration frequency, F 辐 Indicates the highest amplitude of the target motor in the monitoring period, F″ 辐 It indicates that the target motor speed control refers to the maximum amplitude of the adaptation, and a1 and a2 respectively represent the correction factors corresponding to the set vibration frequency and the maximum amplitude.

9. A motor speed control system according to claim 4, characterized in that: The control interference index of the target motor is specifically analyzed as follows: Obtain the rated operating life of the target motor from the motor structure database, and extract the operating time of the target motor and the maintenance time interval between the adjacent regular maintenance time point and the current time point; The control interference index of the target motor is calculated comprehensively, and its calculation expression is: Where η 控 represents the control disturbance index of the target motor, ΔT 电 Indicates the rated operating life of the target motor, T 电 Indicates the operating time of the target motor, T 维 Indicates the maintenance time interval between the adjacent scheduled maintenance time point and the current time point. Indicates the correction factor corresponding to the set operation time. Indicates the risk impact factor corresponding to the set unit maintenance time interval.

10. The motor speed control system according to claim 1, characterized in that: The speed regulation analysis prompts for the target motor are provided, and the specific analysis process is as follows: The speed control evaluation characterization value of the target motor is compared with the speed control evaluation characterization threshold of the target motor. If the speed control evaluation characterization value of the target motor is lower than the speed control evaluation characterization threshold of the target motor, the speed regulation of the target motor is analyzed and prompted.

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