CN115096362A

CN115096362A - Motor stator slot wedge monitoring and analyzing method and device

Info

Publication number: CN115096362A
Application number: CN202210704288.5A
Authority: CN
Inventors: 李治; 方超; 丁刚; 汪勇; 邓志成; 叶晶; 王帝; 谷朋泰; 陈荣泽; 孙猛
Original assignee: Shanghai Power Equipment Research Institute Co Ltd
Current assignee: Shanghai Power Equipment Research Institute Co Ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-09-23

Abstract

The invention discloses a motor stator slot wedge monitoring and analyzing method and device. The method comprises the steps of acquiring sensing data and state data of the motor; the sensing data comprise vibration data of a stator slot wedge of the motor and a key phase signal of the motor; determining a fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of a vibration condition, a health degree and a residual loosening amount; and when the stator slot wedge is determined to be abnormal according to the fastening state, alarming information is sent out. The technical scheme of the embodiment of the invention realizes real-time monitoring and analysis of the state of the stator slot wedge and achieves the effect of quickly and accurately testing the stator slot wedge.

Description

Motor stator slot wedge monitoring and analyzing method and device

Technical Field

The invention relates to the technical field of motors, in particular to a motor stator slot wedge monitoring and analyzing method and device.

Background

The motor is often used as a driver for various important auxiliary machines of a power station, and the straight section part of the stator winding of the motor is usually fastened in a stator core slot by using a slot wedge and a filler strip.

In the running process of a motor, the stator slot wedge bears various alternating electromagnetic forces from a stator bar in an iron core slot and thermal expansion external force caused by variable load, the stator slot wedge is easy to loosen or move, so that the fastening degree of the stator bar in the slot is influenced, mechanical abrasion and in-slot discharge occur on the surface of the stator bar, the main insulation of the stator of the motor is damaged under the action of electric corrosion, the deterioration of the main insulation is accelerated, even the running accident of the motor is caused, the normal running of important machines is influenced, even the machine is stopped, and the safe and stable running of a power plant is seriously threatened.

At present, when a motor stator slot wedge is tested, after the motor is stopped and a rotor is pumped, the tightness of the stator slot wedge is detected by a manual knocking acoustic method or an electronic knocking displacement analysis means, at the moment, the motor is in a cold state, the fastening degree of the stator slot wedge and the hot-state operation process of the motor have larger difference, the dynamic vibration condition that the stator slot wedge bears electromagnetic load in the hot state cannot be simulated, and the vibration condition of the stator slot wedge cannot be accurately tested. In addition, the method can only be carried out during the shutdown, and a repair scheme is customized after a problem is found, so that the loosening condition of the stator slot wedge cannot be tested quickly.

Disclosure of Invention

The invention provides a motor stator slot wedge monitoring and analyzing method and device, which are used for rapidly and accurately testing the vibration condition of a motor stator slot wedge.

According to an aspect of the present invention, there is provided a motor stator slot wedge monitoring and analyzing method, including:

acquiring sensing data and state data of a motor; wherein the sensing data comprises vibration data of a stator slot wedge of the motor and a key phase signal of the motor;

determining a fastening status of the stator slot wedges based on the sensing data and the status data, wherein the fastening status includes at least one of a vibration condition, a health, and a residual release amount;

and sending alarm information when the stator slot wedge is determined to be abnormal according to the fastening state.

Optionally, acquiring sensing data of the motor comprises:

and acquiring vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor, and acquiring a key phase signal of the motor.

Optionally, determining the fastening state of the stator slot wedges from the sensing data and the state data comprises at least one of:

determining the vibration condition of the stator slot wedge according to the sensing data and the state data;

determining the health degree of the stator slot wedge according to the sensing data and the state data;

and determining the residual loosening amount of the stator slot wedge according to the sensing data and the state data.

Optionally, determining the vibration condition of the stator slot wedge according to the sensing data and the state data comprises:

determining the current power of the motor according to the state data, and determining the current frequency of the motor according to the key phase signal;

determining the current vibration value of the stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor;

when the current vibration value is larger than a preset vibration value corresponding to the current power and the current frequency, determining that the stator slot wedge is abnormal in vibration;

when confirming according to fastening state when the stator slot wedge is unusual, send alarm information, include:

and when the vibration of the stator slot wedge is abnormal, determining that the stator slot wedge is abnormal, and sending alarm information.

Optionally, determining the health of the stator slot wedges from the sensory data and the status data comprises:

determining the maximum vibration value and the average vibration value of each stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor;

when the current power of the motor is determined to be unchanged according to the state data, the difference value between the maximum vibration value and the average vibration value is smaller than a first preset value, and when the maximum vibration value is smaller than a second preset value, the health degree of the stator slot wedge is determined to be in a normal state;

when the maximum vibration value is larger than the second preset value, the change rate of the maximum vibration value is larger than a third preset value and the change rate of the average vibration value is smaller than a fourth preset value along with the change of the running time of the motor, the health degree of the stator slot wedge is determined to be in a state to be concerned;

when the variation rate of the maximum vibration value is smaller than a fifth preset value and the variation rate of the average vibration value is larger than a sixth preset value along with the variation of the running time of the motor, determining that the health degree of the stator slot wedge is in an abnormal state;

along with the change of the running time of the motor, the change rate of the maximum vibration value is smaller than a seventh preset value, the change rate of the average vibration value is larger than an eighth preset value, and the difference value between the average vibration value and the maximum vibration value is smaller than a ninth preset value, so that the health degree of the stator slot wedge is determined to be in a serious abnormal state;

and when the health degree of the stator slot wedge is in a state to be noted, an abnormal state or a serious abnormal state, sending alarm information.

determining a pass-frequency vibration value of each stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase band of the motor; the pass-frequency vibration value is the vector sum of the vibration amplitudes of all the vibration data;

determining a main frequency vibration component of the stator slot wedge according to the state data and the vibration data;

when the through-frequency vibration value is smaller than a tenth preset value and the ratio of the main frequency vibration component in all frequency components is larger than an eleventh preset value, determining that the health degree of the stator slot wedge is in a normal state;

along with the change of the running time of the motor, the change rate of the through-frequency vibration value is larger than zero, and the ratio change rate of the main-frequency vibration component in all frequency components is smaller than zero, the health degree of the stator slot wedge is determined to be in a state to be concerned;

when the through-frequency vibration value is larger than a twelfth preset value and the ratio of the main frequency vibration component in all frequency components is smaller than a thirteenth preset value, determining that the health degree of the stator slot wedge is in an abnormal state;

and when the health degree of the stator slot wedge is in a concerned state or an abnormal state, alarming information is sent out.

determining an average vibration value of each stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase band of the motor;

when the power of the motor is determined to be unchanged according to the state data, the change rate of the average vibration value of the stator slot wedge is greater than a fourteenth preset value, and when the change rate of the temperature of the motor is determined to be greater than a fifteenth preset value according to the state data, the health degree of the stator slot wedge is determined to be in an abnormal state;

and when the health degree of the stator slot wedge is in an abnormal state, alarming information is sent out.

Optionally, determining the remaining amount of play of the stator slot wedge according to the sensing data and the status data comprises:

establishing a corresponding relation of the loosening amount according to the vibration data, the stator parameters and the loosening amount of the stator slot wedge of the motor with the same model as the motor;

determining the residual loosening amount of the stator slot wedge according to the current vibration data of the stator slot wedge, the current stator parameters in the state data and the corresponding relation;

and when the residual looseness of the stator slot wedge is smaller than the preset looseness, alarming information is sent out.

According to another aspect of the present invention, there is provided a motor stator slot wedge monitoring and analyzing apparatus including: the device comprises a sensing module and a control module;

the sensing module is connected with the control module and used for collecting sensing data of the motor and state data of the motor; the control module is used for acquiring sensing data and state data of the motor; determining a fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of a vibration condition, a health degree and a residual loosening amount; when the stator slot wedge is determined to be abnormal according to the fastening state, alarm information is sent out; wherein the sensing data comprises vibration data of a stator slot wedge of the motor and a key phase signal of the motor.

Optionally, the sensing module comprises a capacitive vibration sensor and an eddy current sensor;

the capacitive vibration sensor is arranged on a stator slot wedge in each phase zone, at least one capacitive vibration sensor is arranged in each phase zone, and the capacitive vibration sensors are used for acquiring vibration data of a plurality of points of the stator slot wedge;

the eddy current sensor is used for acquiring a key phase signal of the motor.

According to the technical scheme of the embodiment of the invention, the fastening state of the stator slot wedge can be determined by acquiring the sensing data and the state data of the motor, and when determining whether the stator slot wedge is abnormal or not according to the fastening state, the judgment can be carried out according to at least one of the vibration condition, the health degree and the residual looseness. When the vibration of the stator slot wedges is determined to be abnormal according to the vibration data, the key phase signals and the state data, the fact that the stator slot wedges vibrate greatly, the stator slot wedges are loosened, the fastening state of the stator slot wedges is abnormal is indicated, and therefore the stator slot wedges are determined to be abnormal.

The health degree of the stator slot wedges can be determined according to the sensing data and the state data, when the health degree is abnormal, the stator slot wedges are loose, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal.

The residual loosening amount of the stator slot wedges can be determined according to the sensing data and the state data, when the residual loosening amount of the stator slot wedges is too small, the fact that the stator slot wedges are too loose is shown, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. When the stator slot wedge is judged to be abnormal, the control module can send alarm information to remind workers of overhauling the stator slot wedge in time. Therefore, whether the stator slot wedges are abnormal or not can be judged in real time by collecting the vibration data of the stator slot wedges in real time, and the effect of quickly testing the stator slot wedges is achieved; in addition, the running state of the motor can be determined by combining the key phase signal and the state data of the motor, the stator slot wedge is tested when the motor normally runs, the fastening state of the stator slot wedge is judged, and the stator slot wedge can be tested more accurately; the frequency of the motor can be determined according to the key phase signal, the power of the motor can be determined according to the state data, the vibration change of the stator slot wedge can be observed under the same frequency and the same power, and the stator slot wedge can be tested more accurately. The technical scheme of the embodiment of the invention solves the problem that the state of the stator slot wedge cannot be rapidly and accurately detected when the stator slot wedge is detected after the motor is stopped, realizes the real-time monitoring and analysis of the state of the stator slot wedge, and achieves the effect of rapidly and accurately testing the stator slot wedge.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart of a method for monitoring and analyzing a slot wedge of a motor stator according to an embodiment of the present invention;

fig. 2 is a flowchart of another method for monitoring and analyzing a slot wedge of a stator of an electric machine according to an embodiment of the present invention;

fig. 3 is a flowchart of another method for monitoring and analyzing a slot wedge of a stator of an electric machine according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the result of vibration analysis of the stator slot wedges according to an embodiment of the present invention;

fig. 5 is a flowchart of another method for monitoring and analyzing a slot wedge of a stator of an electric machine according to an embodiment of the present invention;

fig. 6 is a flowchart of another method for monitoring and analyzing slot wedges of a stator of an electric machine according to an embodiment of the present invention;

fig. 7 is a flowchart of another method for monitoring and analyzing slot wedges of a stator of an electric machine according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a motor stator slot wedge monitoring and analyzing device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another device for monitoring and analyzing a slot wedge of a stator of a motor according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a flowchart of a method for monitoring and analyzing a slot wedge of a stator of an electric machine according to an embodiment of the present invention, as shown in fig. 1, the method includes:

s110, acquiring sensing data and state data of the motor; wherein the sensing data includes vibration data of stator slot wedges of the motor and key phase signals of the motor.

Specifically, the sensing data and the state data of the motor can be acquired through a sensor, for example, the vibration data of a stator slot wedge of the motor is acquired through a capacitive vibration sensor, the key phase signal of the motor is acquired through an eddy current sensor, and the sensing data and the state data of the motor can be acquired by the control module from the sensor.

Illustratively, the motor is a driving machine of an auxiliary machine of a power plant, namely a machine for providing assistance for generating power by the generator, and the motor can drive a fan system and a water pump system in a heat dissipation system of the generator. The state data of the motor comprises the actual power of the generator set, the total fuel quantity of the boiler, the main steam flow, the total air quantity and other overall data, and also comprises the flue gas flow, the air pressure, the air temperature, the opening degree of an air door baffle and the like of the fan system; the total flow, the pressure and the like of the water pump system further comprise data such as motor stator current, stator current frequency, stator voltage, stator winding temperature, cold air temperature, hot air temperature and the like. Whether the running state of the motor is normal or not can be judged according to the state data of the motor, and under the condition that the running state of the motor is normal, the vibration data of the stator slot wedge of the motor is analyzed, so that the state of the stator slot wedge can be analyzed more accurately, and the looseness degree of the stator slot wedge is judged.

The control module may be, for example, a master control system of a power station, or may be another controller, which is not limited in this embodiment.

And S120, determining the fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of vibration condition, health degree and residual loosening amount.

Specifically, the fastening state of the stator slot wedge is determined according to the sensing data and the state data, and whether the stator slot wedge is loosened or not can be determined, so that whether the stator slot wedge is abnormal or not can be judged. When the fastening state is abnormal, the stator slot wedge is loose, and the stator slot wedge can be determined to be abnormal. The vibration condition of the stator slot wedges can be determined according to the sensing data and the state data, when the vibration is abnormal, the stator slot wedges are loose, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. The health degree of the stator slot wedges can be determined according to the sensing data and the state data, when the health degree is abnormal, the stator slot wedges are loose, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. The residual loosening amount of the stator slot wedges can be determined according to the sensing data and the state data, when the residual loosening amount of the stator slot wedges is too small, the fact that the stator slot wedges are too loose is shown, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal.

And S130, sending alarm information when the stator slot wedge is determined to be abnormal according to the fastening state.

Specifically, when determining whether the stator slot wedge is abnormal according to the fastening state, the determination may be made according to at least one of the vibration condition, the health degree, and the remaining loosening amount. When the vibration of the stator slot wedges is determined to be abnormal according to the vibration data, the key phase signals and the state data, the fact that the stator slot wedges vibrate greatly, the stator slot wedges are loosened, the fastening state of the stator slot wedges is abnormal is indicated, and therefore the stator slot wedges are determined to be abnormal. The health degree of the stator slot wedges can be determined according to the sensing data and the state data, when the health degree is abnormal, the stator slot wedges are loose, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. The residual loosening amount of the stator slot wedges can be determined according to the sensing data and the state data, when the residual loosening amount of the stator slot wedges is too small, the fact that the stator slot wedges are too loose is shown, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. When the stator slot wedge is judged to be abnormal, the control module can send alarm information to remind workers of overhauling the stator slot wedge in time. Therefore, whether the stator slot wedges are abnormal or not can be judged in real time by collecting vibration data of the stator slot wedges in real time, the state of the stator slot wedges can be monitored and analyzed in real time, and the effect of rapidly testing the stator slot wedges is achieved; in addition, the running state of the motor can be determined by combining the key phase signal and the state data of the motor, the stator slot wedge is tested when the motor runs normally, the fastening state of the stator slot wedge is judged, and the stator slot wedge can be tested more accurately; the frequency of the motor can be determined according to the key phase signal, the power of the motor can be determined according to the state data, the vibration change of the stator slot wedge can be observed under the same frequency and the same power, and the stator slot wedge can be tested more accurately.

In addition, it is comparatively serious to vibrate the condition, perhaps health degree is in needs attention to the state, perhaps when the not hard up condition of stator slot wedge is less, sends alarm information, can remind the staff to overhaul before the stator slot wedge is become flexible completely, can predict the not flexible condition of motor operation in-process stator slot wedge in advance to avoid the stator slot wedge to become flexible completely and lead to motor operation accident.

According to the technical scheme, the fastening state of the stator slot wedge can be determined by acquiring the sensing data and the state data of the motor, and when whether the stator slot wedge is abnormal or not is determined according to the fastening state, judgment can be carried out according to at least one of the vibration condition, the health degree and the residual loosening amount. When the vibration of the stator slot wedges is determined to be abnormal according to the vibration data, the key phase signals and the state data, the fact that the stator slot wedges vibrate greatly, the stator slot wedges are loosened, the fastening state of the stator slot wedges is abnormal is indicated, and therefore the stator slot wedges are determined to be abnormal. The health degree of the stator slot wedges can be determined according to the sensing data and the state data, when the health degree is abnormal, the stator slot wedges are loose, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. The residual loosening amount of the stator slot wedges can be determined according to the sensing data and the state data, when the residual loosening amount of the stator slot wedges is too small, the fact that the stator slot wedges are too loose is shown, the fastening state of the stator slot wedges is abnormal, and therefore the stator slot wedges are determined to be abnormal. When the stator slot wedge is judged to be abnormal, the control module can send alarm information to remind workers of overhauling the stator slot wedge in time. Therefore, whether the stator slot wedge is abnormal or not can be judged in real time by acquiring the vibration data of the stator slot wedge in real time, and the effect of quickly testing the stator slot wedge is achieved; in addition, the running state of the motor can be determined by combining the key phase signal and the state data of the motor, the stator slot wedge is tested when the motor normally runs, the fastening state of the stator slot wedge is judged, and the stator slot wedge can be tested more accurately; the frequency of the motor can be determined according to the key phase signal, the power of the motor can be determined according to the state data, the vibration change of the stator slot wedge can be observed under the same frequency and the same power, and the stator slot wedge can be tested more accurately. The technical scheme of this embodiment has solved and has detected the stator slot wedge after the motor is shut down, the unable problem of the quick accurate state that detects the stator slot wedge, has realized the state of real-time supervision analysis stator slot wedge, has reached the effect of quick accurate test stator slot wedge. And, the technical scheme of this embodiment need not the motor and shuts down and detects, can be at the state of the quick accurate detection stator slot wedge of motor operation in-process, when the stator slot wedge is unusual, can in time carry out the machine halt and overhaul, can avoid damaging motor or other machines.

On the basis of the above technical solution, optionally, S120 determines the fastening state of the stator slot wedge according to the sensing data and the state data, and includes at least one of the following: determining the vibration condition of the stator slot wedge according to the sensing data and the state data; determining the health degree of the stator slot wedge according to the sensing data and the state data; and determining the residual loosening amount of the stator slot wedge according to the sensing data and the state data.

For example, when the normal operation of the motor is determined according to the state data, the sensing data comprises vibration data of the stator slot wedge and a key phase signal of the motor, the current frequency of the motor can be determined according to the key phase signal, the vibration data of the stator slot wedge corresponding to the current frequency is compared with preset vibration data corresponding to the current frequency, and whether the vibration of the stator slot wedge is abnormal or not can be judged; therefore, whether the vibration of the stator slot wedge is abnormal or not can be judged in real time by acquiring the vibration data of the stator slot wedge in real time, and the effect of rapidly testing the stator slot wedge is achieved; and the vibration condition of the stator slot wedge is judged by combining the key phase signal and the state data of the motor, so that the stator slot wedge can be tested more accurately.

The health degree of the stator slot wedge can be determined according to the vibration data of the stator slot wedge when the motor normally operates according to the state data, for example, whether the health degree of the stator slot wedge is in a normal state, an abnormal state or a serious abnormal state is judged, so that the health degree of the stator slot wedge can be judged in real time by collecting the vibration data of the stator slot wedge in real time, whether the looseness amount of the stator slot wedge is abnormal or not is judged in real time, and the effect of quickly testing the stator slot wedge is achieved; and moreover, the health degree of the stator slot wedge is judged by combining the key phase signal and the state data of the motor, so that the stator slot wedge can be tested more accurately.

Determining the normal operation of the motor according to the state data, determining the current frequency of the motor according to the key phase signal, determining the current stator parameter in the motor according to the state data, and determining the residual looseness of the stator slot wedge according to the current frequency, the current stator parameter and the current vibration data; the loosening condition of the stator slot wedge can be judged according to the residual loosening amount; the loosening condition of the stator slot wedge can be judged in real time by acquiring the vibration data of the stator slot wedge in real time, so that the effect of quickly testing the stator slot wedge is achieved; and the loosening condition of the stator slot wedge is judged by combining the key phase signal and the state data of the motor, so that the stator slot wedge can be tested more accurately.

Fig. 2 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided in an embodiment of the present invention, and optionally, referring to fig. 2, the method for monitoring and analyzing a motor stator slot wedge includes:

s210, vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor are obtained, a key phase signal of the motor is obtained, and state data of the motor is obtained.

Specifically, the motor is, for example, a three-phase motor, and then the motor includes three phase belts, at least one vibration sensor is disposed in each phase belt of the motor, and the vibration sensor is disposed on the stator slot wedge, and the vibration sensor is, for example, a sheet-type capacitive vibration sensor, and can acquire vibration data of a plurality of points on the stator slot wedge; the control module obtains vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor from the vibration sensor, and then a plurality of positions of the stator slot wedges can be detected, so that the accuracy of testing the stator slot wedges is improved. And the control module can acquire the key phase signal and the state data of the motor, comprehensively analyze the vibration data, the key phase signal and the state data, test the stator slot wedge of the motor which normally runs, observe the vibration change of the stator slot wedge according to the vibration data when the running power of the motor is unchanged, more accurately analyze the state of the stator slot wedge, and improve the accuracy of the test of the stator slot wedge.

And S220, determining the current power of the motor according to the state data, and determining the current frequency of the motor according to the key phase signal.

Specifically, the status data includes current data and voltage data of the motor, from which the present power of the motor can be determined; the current frequency of the motor is determined according to the key phase signal, and vibration data with the same power and frequency can be compared, so that the vibration change of the stator slot wedge is accurately determined; for the variable frequency motor, the stator slot wedge can be tested more accurately.

And S230, determining the current vibration value of the stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase belt of the motor.

Specifically, according to the vibration data of the stator slot wedge that acquires, confirm the current vibration value of stator slot wedge, can confirm the vibration amplitude of stator slot wedge in real time, be convenient for carry out the analysis to the vibration condition of stator slot wedge, when the vibration condition is unusual, can in time remind the staff, realized the state of monitoring analysis stator slot wedge, reach the effect of short-term test.

And S240, when the current vibration value is larger than the preset vibration value corresponding to the current power and the current frequency, determining that the vibration of the stator slot wedge is abnormal.

Specifically, a preset vibration value corresponding to the current power and the current frequency is determined, the current vibration value is compared with the preset vibration value, and if the current vibration value is larger than the preset vibration value, which indicates that the current vibration value of the stator slot wedge is too large, it can be determined that the vibration of the stator slot wedge is abnormal, and the fastening state of the stator slot wedge is abnormal, so that the stator slot wedge is determined to be abnormal. Through comparing the preset vibration value corresponding to the current power and the current frequency with the current vibration value, the vibration condition of the stator slot wedge can be determined more accurately, and the effect of accurately testing the stator slot wedge is achieved.

And S250, when the vibration of the stator slot wedge is abnormal, determining that the stator slot wedge is abnormal, and sending alarm information.

Specifically, the vibration of stator slot wedge is unusual, and then the fastening state of stator slot wedge is unusual, and the stator slot wedge takes place to become flexible, will send alarm information, in time reminds the staff to maintain the stator slot wedge.

Optionally, after the alarm signal is sent out, the method further comprises: and outputting a maintenance list.

Specifically, after the fastening state of the stator slot wedge is abnormal, alarm information is sent to remind a worker, and an overhaul list of the stator slot wedge is output, wherein the overhaul list comprises the number of the abnormal stator slot wedge, the vibration data of the abnormal stator slot wedge, a suggested overhaul scheme and the like, so that the worker can overhaul the stator slot wedge according to the overhaul list.

Fig. 3 is a flowchart of another motor stator slot wedge monitoring and analyzing method provided in an embodiment of the present invention, and optionally, with reference to fig. 3, the motor stator slot wedge monitoring and analyzing method includes:

s310, vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor are obtained, a key phase signal of the motor is obtained, and state data of the motor is obtained.

And S320, determining the maximum vibration value and the average vibration value of each stator slot wedge according to the vibration data of a plurality of points on at least one stator slot wedge in each phase belt of the motor.

Specifically, the vibration sensor can acquire vibration data of a plurality of points on the stator slot wedge, determine the maximum vibration value and the average vibration value of the stator slot wedge according to the vibration data of the plurality of points, and analyze the vibration of the stator slot wedge by combining the maximum vibration value and the average vibration value, so that the health degree of the stator slot wedge can be more accurately determined; the abnormal condition of the stator slot wedge is avoided when the vibration value of a certain point is large and the average vibration value is small, so that the misjudgment can be avoided, and the effect of accurately determining the health degree of the stator slot wedge is achieved.

S330, when the current power of the motor is determined to be unchanged according to the state data, the difference value between the maximum vibration value and the average vibration value is smaller than a first preset value, and when the maximum vibration value is smaller than a second preset value, the health degree of the stator slot wedge is determined to be in a normal state.

Specifically, when the current power of the motor is determined to be unchanged according to the state data, the change of the maximum vibration value and the average vibration value of the stator slot wedge is observed, and the state of the stator slot wedge can be judged more accurately. When the current power of the motor is unchanged, the difference value between the maximum vibration value and the average vibration value is smaller than a first preset value, and the maximum vibration value is smaller than a second preset value, it is indicated that the difference between the maximum vibration value and the average vibration value is smaller, the maximum vibration value and the average value are smaller, the stator slot wedges are fastened, and it can be determined that the health degree of the stator slot wedges is in a normal state. The first preset value and the second preset value may be determined according to actual conditions, for example, according to parameters such as a model of the motor, a size of the stator slot wedge, and a material, and the embodiment is not limited.

Exemplarily, fig. 4 is a schematic diagram of a stator slot wedge vibration analysis result provided by an embodiment of the present invention, as shown in fig. 4, a curve (i) is a curve of a maximum vibration value of a stator slot wedge changing with time, a curve (ii) is a curve of an average vibration value of a stator slot wedge changing with time, an abscissa of the curve is a running time of a motor, an ordinate of the curve is a stator slot wedge vibration per unit value, in a first stage t1, a difference value between the maximum vibration value and the average vibration value is smaller than a first preset value, the maximum vibration value is smaller than a second preset value, and a health degree of the stator slot wedge is in a normal state.

And S340, determining that the health degree of the stator slot wedge is in a state to be paid attention when the maximum vibration value is larger than a second preset value, the variation rate of the maximum vibration value is larger than a third preset value and the variation rate of the average vibration value is smaller than a fourth preset value along with the variation of the motor running time.

Specifically, when the current power of the motor is determined to be unchanged according to the state data, the maximum vibration value is larger than the second preset value along with the change of the running time of the motor, if the change rate of the maximum vibration value is larger than the third preset value and the change rate of the average vibration value is smaller than the fourth preset value, it is indicated that the vibration value of the stator slot wedge is larger, the maximum vibration value is increased faster, the average vibration value is increased slowly, the stator slot wedge is loosened less, and the health degree of the stator slot wedge is determined to be in a state to be paid attention. The specific values of the third preset value and the fourth preset value may be determined according to actual conditions, for example, according to parameters such as the type of the motor, the size of the stator slot wedge, and the material, which is not limited in this embodiment.

Illustratively, referring to fig. 4, in the second stage, the maximum vibration value is larger, the variation rate of the maximum vibration value is larger, and the average vibration value also slowly increases, which indicates that the stator slot wedges have less looseness, and it is determined that the health of the stator slot wedges is in the state of concern.

And S350, determining that the health degree of the stator slot wedge is in an abnormal state when the change rate of the maximum vibration value is smaller than a fifth preset value and the change rate of the average vibration value is larger than a sixth preset value along with the change of the running time of the motor.

Specifically, when the current power of the motor is determined to be unchanged according to the state data, along with the change of the running time of the motor, the change rate of the maximum vibration value of the stator slot wedge is smaller than a fifth preset value, and the change rate of the average vibration value is larger than a sixth preset value, which indicates that the maximum vibration value of the stator slot wedge is in a more stable state, the average vibration value is greatly increased, the vibration value of the whole stator slot wedge is greatly increased, the stator slot wedge is greatly loosened, and the health degree of the stator slot wedge is in an abnormal state. The fifth preset value and the sixth preset value may be determined according to actual conditions, for example, according to parameters such as a model of the motor, a size and a material of the stator slot wedge, and the embodiment is not limited.

Exemplarily, referring to fig. 4, in a third stage t3, the maximum vibration value of the stator slot wedges slowly increases, the average vibration value increases rapidly, the vibration value of the whole stator slot wedges increases greatly, the stator slot wedges loose greatly, and the health of the stator slot wedges is in an abnormal state.

And S360, along with the change of the running time of the motor, the change rate of the maximum vibration value is smaller than a seventh preset value, the change rate of the average vibration value is larger than an eighth preset value, and the difference value between the average vibration value and the maximum vibration value is smaller than a ninth preset value, so that the health degree of the stator slot wedge is determined to be in a serious abnormal state.

Specifically, when the current power of the motor is determined to be unchanged according to the state data, along with the change of the running time of the motor, the change rate of the maximum vibration value is smaller than a seventh preset value, the change rate of the average vibration value is larger than an eighth preset value, and the difference value between the average vibration value and the maximum vibration value is smaller than a ninth preset value, which indicates that the maximum vibration value is in a relatively stable state, the average vibration value is relatively large, the average vibration value is close to the maximum vibration value, namely, the vibration value of each point of the stator slot wedge is relatively large, which indicates that the stator slot wedge is in a completely loose critical state, and the health degree of the stator slot wedge is in a serious abnormal state. The seventh preset value, the eighth preset value, and the ninth preset value may be determined according to actual conditions, for example, according to parameters such as a model of the motor, a size of the stator slot wedge, and a material, and the present embodiment is not limited.

Exemplarily, referring to fig. 4, in a fourth stage t4, the maximum vibration value of the stator slot wedge tends to be stable, the average vibration value varies greatly, and the average vibration value approaches the maximum vibration value, that is, the vibration value of each point of the stator slot wedge is large, the stator slot wedge is in a critical state of complete looseness, and the health of the stator slot wedge is in a serious abnormal state.

And S370, when the health degree of the stator slot wedge is in a state to be noticed, an abnormal state or a serious abnormal state, sending alarm information.

Specifically, when the health degree of the stator slot wedge is in a state to be paid attention to, an abnormal state or a serious abnormal state, the fact that the stator slot wedge is loosened is indicated, the fastening state of the stator slot wedge is abnormal, the control module sends alarm information, and a worker is reminded of timely overhauling. Illustratively, the control module can send different alarm information according to different states of the health degree of the stator slot wedge, so that a worker can determine the abnormal degree of the stator slot wedge according to the alarm information.

Fig. 5 is a flowchart of another motor stator slot wedge monitoring and analyzing method provided in an embodiment of the present invention, and optionally, with reference to fig. 5, the motor stator slot wedge monitoring and analyzing method includes:

s410, vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor are obtained, a key phase signal of the motor is obtained, and state data of the motor are obtained.

S420, determining a pass-frequency vibration value of each stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor; wherein, the pass frequency vibration value is the vector sum of the vibration amplitudes of all the vibration data.

Specifically, according to a plurality of vibration data on the stator slot wedge, determining a vibration amplitude corresponding to the vibration data, namely determining a pass-frequency vibration value of the stator slot wedge; the vibration state of the stator slot wedge can be determined according to the pass-frequency vibration value, for example, when the pass-frequency vibration value is large, the stator slot wedge vibrates greatly and the loosening phenomenon may occur; when the pass frequency vibration value is small, the stator slot wedge vibration is small, and the stator slot wedge is tight.

And S430, determining the main frequency vibration component of the stator slot wedge according to the state data and the vibration data.

Specifically, the current frequency of the motor can be determined according to the state data, and the main frequency of the stator slot wedge can be determined according to the current frequency of the motor; the vibration data of the stator slot wedges are subjected to Fourier transform, and the vibration data can be converted into a frequency domain, so that the main frequency vibration component of the stator slot wedges, namely the component with the maximum vibration, is determined. And if the frequency corresponding to the main frequency vibration component in the frequency domain curve of the stator slot wedge is consistent with the main frequency of the stator slot wedge determined according to the current frequency of the motor, the stator slot wedge is relatively tight.

And S440, when the pass frequency vibration value is smaller than a tenth preset value and the ratio of the main frequency vibration component in all frequency components is larger than an eleventh preset value, determining that the health degree of the stator slot wedge is in a normal state.

Specifically, when the passband vibration value is smaller than a tenth preset value and the ratio of the dominant frequency vibration component in all frequency components is larger than an eleventh preset value, it is indicated that the vibration amplitude of the stator slot wedge is smaller, the clutter component is smaller, the vibration of the stator slot wedge is smaller, and it can be determined that the health degree of the stator slot wedge is in a normal state. Specific values of the tenth preset value and the eleventh preset value may be determined according to actual conditions, and this embodiment is not limited.

S450, along with the change of the running time of the motor, the change rate of the pass frequency vibration value is larger than zero, and the ratio change rate of the main frequency vibration component in all frequency components is smaller than zero, and the health degree of the stator slot wedge is determined to be in a state to be paid attention.

Specifically, along with the change of the running time of the motor, the change rate of the pass-frequency vibration value is greater than zero, and the ratio change rate of the main-frequency vibration component in all frequency components is less than zero, which indicates that the pass-frequency vibration value starts to increase, the ratio of the main-frequency vibration component is reduced, the ratio of the clutter component is increased, the stator slot wedge starts to become loose, the loosening degree is increased, and the health degree of the stator slot wedge is in a state to be paid attention.

And S460, when the pass frequency vibration value is larger than a twelfth preset value and the ratio of the main frequency vibration component in all frequency components is smaller than a thirteenth preset value, determining that the health degree of the stator slot wedge is in an abnormal state.

Specifically, when the pass-frequency vibration value is greater than the twelfth preset value and the ratio of the dominant-frequency vibration component in all frequency components is smaller than the thirteenth preset value, it is indicated that the pass-frequency vibration value is large, the ratio of the exciting-force dominant-frequency vibration component becomes small, the stator slot wedge is already in a critical state of complete looseness, accelerated wear of the subsequent stator slot wedge will occur, and the health degree of the stator slot wedge is in an abnormal state. The twelfth preset value and the thirteenth preset value may be determined according to actual situations, and the embodiment is not limited.

And S470, when the health degree of the stator slot wedge is in a concerned state or an abnormal state, sending alarm information.

Specifically, when the health degree of stator slot wedge is in the state of treating to pay attention to or abnormal state, it shows that stator slot wedge appears becoming flexible, and the fastening state of stator slot wedge is unusual, and control module will send alarm information, reminds the staff in time to overhaul. Illustratively, the control module can send different alarm information according to different states of the health degree of the stator slot wedge, so that a worker can determine the abnormal degree of the stator slot wedge according to the alarm information.

Fig. 6 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided in an embodiment of the present invention, and optionally, referring to fig. 6, the method for monitoring and analyzing a motor stator slot wedge includes:

s510, vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor are obtained, a key phase signal of the motor is obtained, and state data of the motor are obtained.

And S520, determining the average vibration value of each stator slot wedge according to the vibration data of a plurality of points on at least one stator slot wedge in each phase belt of the motor.

Specifically, the vibration sensor can collect vibration data of a plurality of points on the stator slot wedge, and an average vibration value of the stator slot wedge is determined according to the vibration data of the plurality of points, wherein the average vibration value can reflect the whole vibration state of the stator slot wedge, so that the stator slot wedge can be conveniently tested.

S530, when the power of the motor is determined to be unchanged according to the state data, the change rate of the average vibration value of the stator slot wedges is larger than a fourteenth preset value, and when the change rate of the temperature of the motor is determined to be larger than a fifteenth preset value according to the state data, the health degree of the stator slot wedges is determined to be in an abnormal state.

Specifically, when the power of the motor is determined to be unchanged according to the state data, the change rate of the average vibration value of the stator slot wedges is greater than a fourteenth preset value, and when the change rate of the temperature of the motor is determined to be greater than a fifteenth preset value according to the state data, the average vibration value of the stator slot wedges is larger, namely the overall vibration of the stator slot wedges is more serious; and the temperature of the stator winding also climbs, which shows that the vibration of the stator bar increases, the temperature of the stator winding is raised, the main insulation of the stator bar is abraded after the stator bar continuously runs, and the health degree of the stator slot wedge is in an abnormal state. The fourteenth preset value and the fifteenth preset value may be determined according to actual conditions, for example, according to parameters such as a motor model, a size of the stator slot wedge, and a material, and the present embodiment is not limited.

And S540, when the health degree of the stator slot wedge is in an abnormal state, sending alarm information.

Specifically, when the health degree of stator slot wedge was in abnormal state, it appeared becoming flexible to show the stator slot wedge, and the fastening state of stator slot wedge is unusual, and control module will send alarm information, reminds the staff in time to overhaul. Illustratively, the control module can send different alarm information according to different states of the health degree of the stator slot wedges, so that a worker can determine the abnormal degree of the stator slot wedges according to the alarm information.

Fig. 7 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided in an embodiment of the present invention, and optionally, referring to fig. 7, the method for monitoring and analyzing a motor stator slot wedge includes:

s610, vibration data of a plurality of points on at least one stator slot wedge in each phase zone of the motor are obtained, a key phase signal of the motor is obtained, and state data of the motor are obtained.

S620, establishing a corresponding relation of the loosening amount according to the vibration data, the stator parameters and the loosening amount of the stator slot wedge of the motor with the same model as the motor.

Specifically, a corresponding relationship of the amount of play may be established according to vibration data, stator parameters, and the amount of play of the stator slot wedge of the motor of the same model as the motor, which are stored in advance, and the corresponding relationship may be a model, a lookup table, or another form.

S630, determining the residual loosening amount of the stator slot wedge according to the current vibration data of the stator slot wedge, the current stator parameters in the state data and the corresponding relation.

Specifically, the current vibration data of the stator slot wedges and the current stator parameters are substituted into the corresponding relationship, the current loosening amount of the stator slot wedges can be determined, and the current loosening amount is subtracted from the prestored maximum loosening amount of the stator slot wedges of the motor of the same model as the motor, so that the remaining loosening amount of the stator slot wedges can be determined.

And S640, when the residual looseness of the stator slot wedge is smaller than the preset looseness, sending alarm information.

Specifically, predetermine the loose quantity for example for the surplus loose quantity that corresponds when the stator slot wedge is unusual, when surplus loose quantity is less than predetermineeing the loose quantity, show that the surplus loose quantity of stator slot wedge is less, the not hard up degree of stator slot wedge is great, and the stator slot wedge is unusual, and control module will send alarm information, reminds the staff in time to overhaul.

Optionally, the motor stator slot wedge monitoring and analyzing method further includes: displaying at least one of a vibration condition, a health degree and a remaining loosening amount of the stator slot wedge.

Specifically, at least one of the vibration condition, the health degree and the residual looseness of the stator slot wedge can be displayed in a graph mode, so that workers can observe the state of the stator slot wedge conveniently in real time, and the effect of rapidly testing the stator slot wedge is achieved.

Fig. 8 is a schematic structural diagram of a motor stator slot wedge monitoring and analyzing apparatus according to an embodiment of the present invention, and referring to fig. 8, the motor stator slot wedge monitoring and analyzing apparatus includes: a sensing module 710 and a control module 720; the sensing module 710 is connected with the control module 720, and the sensing module 710 is used for collecting sensing data of the motor and state data of the motor; the control module 720 is used for acquiring sensing data and state data of the motor; determining a fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of a vibration condition, a health degree and a residual loosening amount; when the stator slot wedge is determined to be abnormal according to the fastening state, alarm information is sent out; wherein the sensing data comprises vibration data of a stator slot wedge of the motor and a key phase signal of the motor.

Specifically, the sensing module 710 collects sensing data and status data of the motor, for example, the capacitive vibration sensor collects vibration data of a stator slot wedge of the motor, the eddy current sensor collects a key phase signal of the motor, and the control module can obtain the sensing data and status data of the motor from the sensor. The control module 720 is, for example, a master control system of a power station, and may also be another controller, which is not limited in this embodiment.

For example, the electric motor is a driving machine of an auxiliary machine of a power plant, that is, a machine for assisting a generator to generate power, and the electric motor may drive a fan system and a water pump system in a boiler system and a steam turbine system. The state data of the motor comprises the actual power of the generator set, the total fuel quantity of the boiler, the main steam flow, the total air quantity and other overall data, and also comprises the flue gas flow, the air pressure, the air temperature, the opening degree of an air door baffle and the like of the fan system; the total flow, the pressure and the like of the water pump system further comprise data such as motor stator current, stator current frequency, stator voltage, stator winding temperature, cold air temperature, hot air temperature and the like. The control module 720 can judge whether the running state of the motor is normal according to the state data of the motor, and under the condition that the running state of the motor is normal, the vibration data of the stator slot wedge of the motor is analyzed, so that the state of the stator slot wedge can be more accurately analyzed, and the loosening degree of the stator slot wedge is judged. The control module 720 determines the fastening state of the stator slot wedges according to the sensing data and the state data, and may determine whether the stator slot wedges are loosened, thereby determining whether the stator slot wedges are abnormal. When the fastening state is abnormal, the stator slot wedge is loose, and the stator slot wedge can be determined to be abnormal. For example, the control module 720 may make a judgment according to at least one of a vibration condition, a health degree, and a remaining loosening amount when determining whether the stator slot wedge is abnormal according to the fastening state. The control module 720 determines that the motor operates normally according to the state data, and may determine the current frequency of the motor through the key phase signal, compare the vibration data of the stator slot wedge corresponding to the current frequency with the preset vibration data corresponding to the current frequency, and may determine whether the vibration of the stator slot wedge is abnormal; therefore, whether the vibration of the stator slot wedge is abnormal or not can be judged in real time by acquiring the vibration data of the stator slot wedge in real time, and the effect of quickly testing the stator slot wedge is achieved; the control module 720 determines that the motor operates normally according to the state data, determines the health degree of the stator slot wedge according to the vibration data of the stator slot wedge, and judges whether the health degree of the stator slot wedge is in a normal state, an abnormal state or a serious abnormal state, so that whether the looseness amount of the stator slot wedge is abnormal or not is judged in real time, and the effect of rapidly testing the stator slot wedge is achieved; the control module 720 determines the current frequency of the motor according to the key phase signal when the motor normally operates according to the state data, determines the current stator parameter in the motor according to the state data, and determines the residual play amount of the stator slot wedge according to the current frequency, the current stator parameter and the current vibration data; the loosening condition of the stator slot wedge can be judged in real time according to the residual loosening amount, and the effect of quickly testing the stator slot wedge is achieved; and the loosening condition of the stator slot wedge is judged by combining the key phase signal and the state data of the motor, so that the stator slot wedge can be tested more accurately. When the vibration of the stator slot wedge is judged to be abnormal, or the health degree of the stator slot wedge is low, or the stator slot wedge is seriously loosened, the control module can send alarm information and remind a worker to overhaul the stator slot wedge in time.

Fig. 9 is a schematic structural diagram of another device for monitoring and analyzing a slot wedge of a motor according to an embodiment of the present invention, and optionally, referring to fig. 9, a sensing module 710 includes a capacitive vibration sensor 711 and an eddy current sensor; the capacitive vibration sensors 711 are arranged on the stator slot wedges 810 in each phase zone, at least one capacitive vibration sensor 711 is arranged in each phase zone, and the capacitive vibration sensors 711 are used for collecting vibration data of multiple points of the stator slot wedges; the eddy current sensor is used for acquiring a key phase signal of the motor.

Specifically, at least one capacitive vibration sensor 711 is provided in each phase zone, for example, one capacitive vibration sensor 711 is provided in each phase zone, and as shown in fig. 9, the capacitive vibration sensors 711 are uniformly distributed along the circumferential direction of the iron core 820. The capacitive vibration sensor 711 is a sheet type sensor, and can be fixed on the stator slot wedge 810 by an adhesive to detect vibration data of a plurality of points on the stator slot wedge 810, and the capacitive vibration sensor 711 is disposed on the stator slot wedge 810 in each phase band to analyze the stator slot wedge in each phase band. The eddy current sensor can detect the key phase signal of the motor, so that the frequency of the motor can be conveniently determined, and the stator slot wedge can be tested and analyzed no matter the motor is a fixed-frequency motor or a variable-frequency motor. The eddy current sensor is arranged near a key phase slot of the motor, the key phase slot is arranged on a rotating shaft of the motor, and the key phase slot is aligned with the central position of the adjacent magnetic pole of the rotor.

For example, before the capacitive vibration sensor 711 and the eddy current sensor perform detection, parameters of the capacitive vibration sensor 711 and the eddy current sensor, such as sensitivity, sampling rate, number, and measuring range, may be set by the control module 720, so as to improve the accuracy of the detection.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor stator slot wedge monitoring and analyzing method is characterized by comprising the following steps:

determining a fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of a vibration condition, a health degree and a residual loosening amount;

2. The method of claim 1, wherein acquiring sensory data of the motor comprises:

3. The method of claim 1, wherein determining the fastening status of the stator slot wedge from the sensory data and the status data comprises at least one of:

4. The method of claim 3, wherein determining the vibration condition of the stator slot wedge based on the sensed data and the status data comprises:

5. The method of claim 3, wherein determining the health of the stator slot wedge based on the sensory data and the status data comprises:

when the maximum vibration value is larger than the second preset value, the variation rate of the maximum vibration value is larger than a third preset value and the variation rate of the average vibration value is smaller than a fourth preset value along with the variation of the running time of the motor, determining that the health degree of the stator slot wedge is in a state to be concerned;

6. The method of claim 3, wherein determining the health of the stator slot wedge based on the sensory data and the status data comprises:

determining the pass-frequency vibration value of each stator slot wedge according to vibration data of a plurality of points on at least one stator slot wedge in each phase band of the motor; the pass-frequency vibration value is the vector sum of the vibration amplitudes of all the vibration data;

7. The method of claim 3, wherein determining the health of the stator slot wedge based on the sensory data and the status data comprises:

8. The method of claim 3, wherein determining a remaining amount of play of the stator slot wedge based on the sensory data and the status data comprises:

determining the residual loosening amount of the stator slot wedge according to the current vibration data of the stator slot wedge, the current stator parameter in the state data and the corresponding relation;

9. A motor stator slot wedge monitoring and analyzing device is characterized by comprising: the device comprises a sensing module and a control module;

the sensing module is connected with the control module and is used for acquiring sensing data of the motor and state data of the motor; the control module is used for acquiring sensing data and state data of the motor; determining a fastening state of the stator slot wedge according to the sensing data and the state data, wherein the fastening state comprises at least one of a vibration condition, a health degree and a residual loosening amount; when the stator slot wedge is determined to be abnormal according to the fastening state, alarm information is sent out; wherein the sensing data comprises vibration data of a stator slot wedge of the motor and a key phase signal of the motor.

10. The motor stator slot wedge monitoring and analyzing device of claim 9, wherein the sensing module comprises a capacitive vibration sensor and an eddy current sensor;

the capacitive vibration sensors are arranged on the stator slot wedges in each phase zone, at least one capacitive vibration sensor is arranged in each phase zone, and the capacitive vibration sensors are used for acquiring vibration data of a plurality of points of the stator slot wedges;

the eddy current sensor is used for acquiring a key phase signal of the motor.