CN117559354A - Motor drive control method and device - Google Patents

Motor drive control method and device Download PDF

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Publication number
CN117559354A
CN117559354A CN202311567432.6A CN202311567432A CN117559354A CN 117559354 A CN117559354 A CN 117559354A CN 202311567432 A CN202311567432 A CN 202311567432A CN 117559354 A CN117559354 A CN 117559354A
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China
Prior art keywords
motor
frequency
coefficient
temperature
running
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CN202311567432.6A
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Chinese (zh)
Inventor
陈锃基
丁世来
眭演祥
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East China Branch Of 5th Electronics Research Institute Of Ministry Of Information Industry Of China
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East China Branch Of 5th Electronics Research Institute Of Ministry Of Information Industry Of China
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Priority to CN202311567432.6A priority Critical patent/CN117559354A/en
Publication of CN117559354A publication Critical patent/CN117559354A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0822—Integrated protection, motor control centres
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/01—Asynchronous machines

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The invention discloses a motor drive control method and a motor drive control device, wherein the motor drive control method comprises the following steps: collecting operation parameters and environment parameters of an asynchronous motor in real time; the operating parameters include at least motor frequency, motor temperature, and motor operating time; the environmental parameters include at least ambient humidity and ambient air pressure; setting an operation state coefficient according to the operation parameters; correcting and compensating the running state coefficient according to the environmental parameters; and judging the operation safety of the asynchronous motor according to the compensated operation state coefficient, and controlling the operation of the asynchronous motor according to the operation safety judgment result. The technical scheme provided by the invention can improve the safety and stability of the operation of the motor.

Description

Motor drive control method and device
Technical Field
The present invention relates to the field of motor control technologies, and in particular, to a motor driving control method and apparatus.
Background
The motor is a carrier for realizing electric energy conversion, and has important roles and positions in the field of production and manufacture along with economic development. The motor control technology takes a motor as a control object, realizes the control of the running quantity such as the motor speed, the power and the like through the electric quantity such as the voltage, the current, the frequency and the like, so that the motor drives various production machines to run according to the expected mode so as to meet the requirements of a production process.
The existing motor control system has the advantages of high integration level, small volume, light weight, good heat dissipation performance and the like. However, when the motor is operated, the motor operation state cannot be accurately mastered, so that the motor operation state cannot be accurately controlled based on the operation state, and the motor operation stability and safety are insufficient.
Disclosure of Invention
The embodiment of the invention provides a motor driving control method and a motor driving control device, which are used for improving the safety and stability of motor operation.
In a first aspect, an embodiment of the present invention provides a motor driving control method, including:
collecting operation parameters and environment parameters of an asynchronous motor in real time; the operation parameters at least comprise motor frequency, motor temperature and motor operation time; the environmental parameters at least comprise environmental humidity and environmental air pressure;
setting an operation state coefficient according to the operation parameter;
correcting and compensating the running state coefficient according to the environmental parameter;
and judging the operation safety of the asynchronous motor according to the compensated operation state coefficient, and controlling the operation of the asynchronous motor according to the operation safety judgment result.
In a second aspect, an embodiment of the present invention further provides a motor driving control device, which is applicable to the motor driving control method provided in any embodiment of the present invention, including:
the acquisition module is used for acquiring the operation parameters and the environment parameters of the asynchronous motor in real time; the operation parameters at least comprise motor frequency, motor temperature and motor operation time; the environmental parameters at least comprise environmental humidity and environmental air pressure;
the analysis module is used for setting an operation state coefficient according to the operation parameter, and correcting and compensating the operation state coefficient according to the environment parameter;
and the control module is used for judging the operation safety of the asynchronous motor according to the compensated operation state coefficient and controlling the operation of the asynchronous motor according to the operation safety judgment result.
According to the invention, the running parameters and the environment parameters of the asynchronous motor are acquired in real time, the running state coefficients are set according to the running parameters and the environment parameters, and the running state coefficients are obtained by comprehensively calculating a plurality of running parameters and environment parameters, so that the running state of the asynchronous motor can be accurately identified. And the running state coefficient can be further corrected and compensated according to the environmental parameters, so that the accuracy of the running state coefficient is enhanced. The running safety of the asynchronous motor is judged according to the compensated running state coefficient, and when the running of the asynchronous motor is at risk, the running state setting of the asynchronous motor is timely adjusted to close the asynchronous motor.
Drawings
Fig. 1 is a schematic flow chart of a motor driving control method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of obtaining a frequency influence coefficient according to a motor frequency according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of obtaining a temperature influence coefficient according to a motor temperature according to an embodiment of the present invention;
fig. 4 is a flow chart of another motor driving control method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a motor driving control device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the prior art, the integrated motor control system is very mature, and generally comprises a driving motor and a motor controller fixed above the driving motor, wherein the motor controller comprises a controller box body, and a film capacitor, a power module, an input module, an output module and a control board which are arranged in the controller box body. The integrated motor control system has the advantages of high integration degree, small volume, light weight, good heat dissipation performance and the like. However, the running state of the motor cannot be accurately controlled during running, the running state of the motor is not accurately controlled based on the running state, and the running stability and safety of the motor are insufficient.
In order to solve the above-mentioned problems, an embodiment of the present invention provides a motor driving control method, and fig. 1 is a schematic flow chart of the motor driving control method provided in the embodiment of the present invention, as shown in fig. 1, the method in the embodiment includes the following steps:
step S101, collecting operation parameters and environment parameters of an asynchronous motor in real time; the operating parameters include at least motor frequency, motor temperature, and motor operating time; the environmental parameters include at least ambient humidity and ambient air pressure.
In this embodiment, the running state of the asynchronous motor is obtained through the parameters of the asynchronous motor. In particular, the parameters of the asynchronous motor include its own operating parameters and the environmental parameters surrounding the asynchronous motor. The operating parameters include at least motor frequency, motor temperature, and motor operating time, although the operating parameters may include motor speed, motor power, etc., which are not limited in this example. The environmental parameters include parameters such as ambient humidity and ambient air pressure which have influence on the asynchronous motor.
Step S102, setting an operation state coefficient according to the operation parameters.
The embodiment can perform data analysis on the operation parameters, and set an operation state coefficient H and a calculation formula thereof. The calculation factors of the operating state coefficient H include motor frequency, motor temperature, and motor operating time. The embodiment can further calculate and process the calculation factors of the motor frequency, the motor temperature and the motor running time to obtain a calculation formula of the running state coefficient H, and obtain the running state coefficient according to the calculation formula of the running state coefficient H.
And step S103, correcting and compensating the running state coefficient according to the environmental parameters.
After the running state coefficient is obtained, the running state coefficient can be corrected and compensated through the ambient humidity and the ambient air pressure, so that the running state coefficient can more accurately represent the running state of the asynchronous motor, and the running state of the asynchronous motor can be conveniently obtained according to the running state coefficient.
And step S104, judging the operation safety of the asynchronous motor according to the compensated operation state coefficient, and controlling the operation of the asynchronous motor according to the operation safety judging result.
According to the invention, the running parameters and the environment parameters of the asynchronous motor are acquired in real time, the running parameters and the environment parameters are subjected to data analysis, the running state coefficient H and a calculation formula thereof are set, and the running safety of the asynchronous motor is judged according to the data analysis result, so that whether the running state of the asynchronous motor has risks or not is accurately acquired, the asynchronous motor is timely regulated in the risk running state, and the running stability and the running safety of the asynchronous motor are improved.
In addition, the embodiment can store the operation parameters, the environment parameters, the data analysis results and the safety judgment results which are acquired in real time, so that the operation state of the asynchronous motor can be further generalized and analyzed. According to the method, the running process of the asynchronous motor is controlled according to the safety judgment result, and the safety running efficiency of the asynchronous motor of the Internet of things is effectively improved.
In the embodiment of the invention, the running parameters and the environment parameters of the asynchronous motor are acquired in real time, the running state coefficients are set according to the running parameters and the environment parameters, and the running state coefficients are obtained by comprehensively calculating a plurality of running parameters, so that the running state of the asynchronous motor can be accurately identified. And the running state coefficient can be further corrected and compensated according to the environmental parameters, so that the accuracy of the running state coefficient is enhanced. The running safety of the asynchronous motor is judged according to the compensated running state coefficient, and when the running of the asynchronous motor is at risk, the running state setting of the asynchronous motor is timely adjusted to close the asynchronous motor.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Optionally, setting the operation state coefficient according to the operation parameter and the environmental parameter may include: acquiring a frequency influence coefficient according to the frequency of the motor; acquiring a temperature influence coefficient according to the temperature of the motor; acquiring an operation state coefficient H=M+N+Ta/T; wherein M is a frequency influence coefficient, N is a temperature influence coefficient, ta is the running time of the motor, and T is a preset motor running period. In this embodiment, the operation state coefficient formula is set to h=m+n+ta/T; the frequency influence coefficient M is obtained through the motor frequency, and the temperature influence coefficient N is obtained according to the motor temperature. The motor already-running time Ta may be acquired by a timer or the like. The preset motor operation period T can be set according to rated parameters of the motor and user requirements.
Since the operating state coefficient h=m+n+ta/T, the frequency influence coefficient M is obtained from the motor frequency. In another example of the embodiment of the present invention, a specific procedure of "obtaining a frequency influence coefficient from a motor frequency" may be described in detail. Fig. 2 is a schematic flow chart of obtaining a frequency influence coefficient according to a motor frequency according to an embodiment of the present invention, and as shown in fig. 2, the method of the embodiment includes the following steps:
step S201, comparing the motor frequency A of the asynchronous motor with a preset motor frequency.
In step S202, if a < A1, it is determined that the motor frequency is low, and the frequency influence coefficient is set to m2=m1+m1× (A1-a)/a.
Wherein A is the motor frequency; a1 is a first preset motor frequency; m1 is a first preset frequency influence coefficient. The first preset motor frequency A1 and the first preset frequency influence coefficient M1 may be set according to a user requirement and a rated parameter of the asynchronous motor, and the specific value is not limited in this embodiment.
And step 203, if A1 is not less than A2, judging that the motor frequency is normal, and setting the frequency influence coefficient as M1.
In this embodiment, a plurality of preset motor frequencies may be set, and in addition to the first preset motor frequency A1, a second preset motor frequency A2 may be set; a1 < A2. In this embodiment, amax may be set to a preset maximum motor frequency. The preset motor frequency is smaller than the preset maximum motor frequency Amax.
In step S204, if A2 is less than A and less than or equal to Amax, the motor frequency is judged to be higher, and the frequency influence coefficient is set to M3=M1+M1× (a-A2)/A2.
And step S205, if A is more than Amax, judging that the motor frequency is too high, and controlling the asynchronous motor to stop running.
When the motor frequency a of the asynchronous motor is low, that is, when a < A1, the frequency influence coefficient can be increased to m2=m1+m1× (A1-a)/a, so as to more accurately represent the motor state of the current asynchronous motor; when the motor frequency A of the asynchronous motor is in the normal range of the motor frequency (A1 is more than or equal to A is less than or equal to A2), the frequency influence coefficient is not processed, and the first preset frequency influence coefficient M1 is kept; when the motor frequency A of the asynchronous motor is higher (A2 is more than A and less than Amax), the frequency influence coefficient is continuously increased to M3=M1+M1× (a-A2)/A2, and the higher motor frequency A of the asynchronous motor is reflected in the running state coefficient H. It is worth noting that when the motor frequency is too high (a > Amax), the operation of the asynchronous motor is stopped directly for safety of the asynchronous motor, without being represented in the operating state coefficient H.
Optionally, obtaining the frequency influence coefficient according to the motor frequency may further include: acquiring a historical operation maximum frequency Aa of an asynchronous motor; if the motor frequency A is less than or equal to Aa, maintaining the frequency influence coefficient as a current value Mi; i=1 or i=2; if the motor frequency A > Aa, the frequency influence coefficient is adjusted to Mi' =Mi+Mix (a-Aa)/A.
In this embodiment, after the current value Mi (M1 or M2) of the frequency influence coefficient is obtained through the processes of steps S201 to S205, the frequency influence coefficient Mi may be further adjusted, so that the frequency influence coefficient can more represent the current motor frequency a. Specifically, the frequency influence coefficient is further adjusted by the historical operation maximum frequency Aa. And if the motor frequency A is less than or equal to Aa, maintaining the frequency influence coefficient as a current value, and if the motor frequency A is more than Aa, continuously increasing the frequency influence coefficient to Mi' =Mi+Mix (a-Aa)/A.
In this embodiment, the value of the frequency influence coefficient is determined according to the motor frequency a of the asynchronous motor collected in real time, and the value of the frequency influence coefficient is adjusted according to the historical operation maximum frequency Aa, so that the adjusted frequency influence coefficient Mi' can embody the motor frequency a of the asynchronous motor more, and the running state coefficient H can embody the running state of the asynchronous motor more. The control accuracy of the asynchronous motor is further enhanced, and the safety of the asynchronous motor is enhanced.
Since the operating state coefficient h=m+n+ta/T, the temperature influence coefficient N is obtained from the motor temperature. In another example of the embodiment of the present invention, a specific procedure of "obtaining a temperature influence coefficient according to a motor temperature" may be described in detail. Fig. 3 is a schematic flow chart of acquiring a temperature influence coefficient according to a motor temperature according to an embodiment of the present invention, and as shown in fig. 3, the method of the embodiment includes the following steps:
step S301, comparing the motor temperature C of the asynchronous motor with a preset standard motor temperature.
And step S302, if C is less than or equal to C0, judging that the temperature of the motor is normal, and setting the temperature influence coefficient as N1.
N1 is a first preset temperature influence coefficient; c0 is the first standard motor temperature. The first preset temperature influence coefficient and the first standard motor temperature can be set according to the user requirement and the rated parameter of the asynchronous motor, and the specific value is not particularly limited in the embodiment.
In step S303, if C0 is smaller than C and equal to or smaller than Cmax, the motor temperature is determined to be higher, and the temperature influence coefficient is set to N2=N1+N1× (C-C0)/C0.
Cmax is the preset maximum motor temperature. In this embodiment, cmax may be set to a preset maximum motor temperature. The first standard motor temperature is smaller than a preset maximum motor temperature Cmax.
And step S304, if C is larger than Cmax, judging that the temperature of the motor is too high, and controlling the asynchronous motor to stop running.
When the motor temperature C of the asynchronous motor is lower (C is less than or equal to C0), the temperature of the motor is normal at the moment, the temperature influence coefficient is not processed, and the temperature influence coefficient can be set to be a first preset temperature influence coefficient N1 so as to more accurately represent the motor state of the current asynchronous motor; when the motor temperature C of the asynchronous motor is higher (C0 is less than or equal to Cmax), the temperature influence coefficient is increased to N2=N1+N1× (C-C0)/C0, and the higher motor temperature C of the asynchronous motor is reflected in the running state coefficient H. It is worth noting that when the motor temperature is too high (C > Cmax), the operation of the asynchronous motor is stopped directly for safety reasons of the asynchronous motor, without being represented in the operating state coefficient H.
Optionally, acquiring the temperature influence coefficient according to the temperature of the motor may further include: acquiring a historical running highest temperature Ca of the asynchronous motor; if the temperature C of the motor is less than or equal to Ca, maintaining the temperature influence coefficient as a current value Ni; i=1 or i=2; if the motor temperature C > Ca, the temperature influence coefficient is adjusted to be Ni' =Ni+Ni× (C-Ca)/C.
In this embodiment, after the current value Ni (N1 or N2) of the temperature influence coefficient is obtained through the processes of steps S301 to S304, the current value Ni of the temperature influence coefficient may be further adjusted, so that the frequency influence coefficient can more represent the current motor temperature C. Specifically, the temperature influence coefficient is further adjusted by the historical running maximum temperature Ca. If the motor temperature C is less than or equal to Ca, the temperature influence coefficient is maintained to be the current value Ni, and if the motor temperature C is greater than Ca, the temperature influence coefficient needs to be continuously increased to be Ni' =ni+ni× (C-Ca)/C.
In this embodiment, the value of the temperature influence coefficient is determined according to the motor temperature C of the asynchronous motor collected in real time, and the value of the temperature influence coefficient is adjusted according to the historical running maximum temperature Ca, so that the adjusted temperature influence coefficient Ni' can more embody the motor temperature C of the asynchronous motor, and the running state coefficient H can more embody the running state of the asynchronous motor. The control accuracy of the asynchronous motor is further enhanced, and the safety of the asynchronous motor is enhanced.
In another example of the embodiment of the present invention, the process of correcting and compensating the operation state coefficient may be further described in detail, and fig. 4 is a schematic flow chart of another motor driving control method provided in the embodiment of the present invention, as shown in fig. 4, where the method of the embodiment includes the following steps:
step S401, collecting operation parameters and environment parameters of an asynchronous motor in real time; the operating parameters include at least motor frequency, motor temperature, and motor operating time; the environmental parameters include at least ambient humidity and ambient air pressure.
Step S402, setting an operation state coefficient according to the operation parameters.
Step S403, comparing the environment humidity G of the asynchronous motor with a preset perspective humidity G0; if G is less than or equal to G0, judging that the ambient humidity is normal, and not correcting the running state coefficient; if G > G0, correcting the running state coefficient to H' =h+h× (G-G0)/G; h is the initial value of the running state coefficient.
Step S404, comparing the ambient air pressure K of the asynchronous motor with a preset ambient air pressure K0; if K < K0, compensating the operation state coefficient to be H "=H '+H' × (K0-K)/K0; when K is more than or equal to K0, the ambient air pressure is judged to be normal, and the running state coefficient is not compensated.
In the embodiment, the operating state coefficient H is corrected through the environment humidity G to obtain a corrected operating state coefficient H'; and then, compensating the running state coefficient H 'by the ambient air pressure K to obtain a compensated running state coefficient H'.
The "correcting and compensating the operation state coefficient according to the value of the environmental parameter" may specifically include step S403 and step S404. After the calculation of the running state coefficient H is completed, the running state coefficient H is corrected according to the environmental humidity G of the working environment of the asynchronous motor, the influence of the environmental humidity on the running state of the motor is reduced through correction, if the environmental humidity G is larger than the preset distant view humidity G0, the corrected running state coefficient is calculated according to the difference value between the environmental humidity G and the preset value, so that the accuracy of the calculation of the running state coefficient H is improved, the safety monitoring efficiency of the asynchronous motor is improved, and the running efficiency of the asynchronous motor is further improved. And after the correction is finished, the running state coefficient is also compensated according to the ambient air pressure K of the working environment of the asynchronous motor, the influence of the ambient air pressure on the running state of the motor is reduced through compensation, if the ambient air pressure K is smaller than a preset value, the compensated running state coefficient is calculated according to the difference value between the ambient air pressure K and the preset value, so that the accuracy of calculating the running state coefficient H is improved, the safety monitoring efficiency of the asynchronous motor is improved, and the running efficiency of the asynchronous motor is further improved.
Step S405, comparing the compensated running state coefficient H' with a preset running state coefficient.
Step S406, if H is less than or equal to H1, judging that the asynchronous motor is in a normal running state, and maintaining the running period of the asynchronous motor as a preset running period of the motor; h1 is a first preset operating state coefficient.
Step S407, if H1 is less than H and less than or equal to H2, judging that the asynchronous motor is in a risk running state, and shortening the motor running period of the asynchronous motor; h2 is a second preset operating state coefficient.
And step 408, if H2 is less than H ", judging that the asynchronous motor is in an abnormal operation state, and controlling the asynchronous motor to stop operation.
The "determining the operation safety of the asynchronous motor according to the compensated operation state coefficient and controlling the operation of the asynchronous motor according to the operation safety determination result" may include the contents of steps S405 to S408. When the operation safety of the asynchronous motor is determined, the operation state of the asynchronous motor is timely adjusted by comparing the compensated operation state coefficient H ' with the preset operation state coefficient, so that the safety monitoring efficiency of the asynchronous motor is improved, the operation efficiency of the asynchronous motor is further improved, when the compensated operation state coefficient H ' is within the first preset operation state coefficient, the operation state is determined to be normal and not adjusted, if the operation safety risk is proved between the first preset operation state coefficient and the second preset operation state coefficient, the operation period is reduced to reduce the failure risk of the asynchronous motor, and if the operation state coefficient H ' is greater than the second preset operation state coefficient, the operation of the asynchronous motor is directly blocked to ensure the operation safety of the asynchronous motor.
Optionally, shortening the motor operation period of the asynchronous motor may include: setting the shortened motor operation period to be T ' =T-T× (H ' -H1)/H '; t, presetting a motor operation period; wherein, if T '< Tmin, then T' =tmin is set; tmin is a preset minimum running period of the motor; comparing the shortened running period T' of the asynchronous motor with the running time Ta of the motor; if T' is less than or equal to Ta, controlling the asynchronous motor to stop running; if T '> Ta, maintaining the running of the asynchronous motor to the running period T' of the motor. When the running period is reduced, the reduced running period is calculated according to the difference value between the running state coefficient H 'and the first preset running state coefficient so as to ensure the running safety of the asynchronous motor, and meanwhile, the shortened running period T' of the asynchronous motor is compared with the running time Ta of the motor, and the running of the asynchronous motor is blocked in time so as to further improve the running safety of the asynchronous motor, thereby improving the running efficiency of the asynchronous motor.
In this embodiment, not only the process of correcting and compensating the running state coefficient is tightly controlled, but also the running state of the asynchronous motor is comprehensively analyzed by comparing a plurality of preset running state coefficients with the compensated running state coefficient H ", and the running of the asynchronous motor is adjusted, so that the risk running state is avoided, and the safety performance and the running efficiency of the asynchronous motor are improved.
Based on the same conception, the embodiment of the invention also provides a motor drive control device which is suitable for the motor drive control method provided by any embodiment of the invention. Fig. 5 is a schematic structural diagram of a motor driving control device according to an embodiment of the present invention, where, as shown in fig. 5, the motor driving control device includes:
the acquisition module 11 is used for acquiring the operation parameters and the environment parameters of the asynchronous motor in real time; the operating parameters include at least motor frequency, motor temperature, and motor operating time; the environmental parameters include at least ambient humidity and ambient air pressure;
an analysis module 12, configured to set an operation state coefficient according to an operation parameter, and correct and compensate the operation state coefficient according to an environmental parameter;
and the control module 13 is used for judging the operation safety of the asynchronous motor according to the compensated operation state coefficient and controlling the operation of the asynchronous motor according to the operation safety judgment result.
In the embodiment of the invention, the running parameters and the environment parameters of the asynchronous motor are acquired in real time, the running state coefficients are set according to the running parameters and the environment parameters, and the running state coefficients are obtained by comprehensively calculating a plurality of running parameters and environment parameters, so that the running state of the asynchronous motor can be accurately identified. And the running state coefficient can be further corrected and compensated according to the environmental parameters, so that the accuracy of the running state coefficient is enhanced. The running safety of the asynchronous motor is judged according to the compensated running state coefficient, and when the running of the asynchronous motor is at risk, the running state setting of the asynchronous motor is timely adjusted to close the asynchronous motor.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. A motor drive control method, characterized by comprising:
collecting operation parameters and environment parameters of an asynchronous motor in real time; the operation parameters at least comprise motor frequency, motor temperature and motor operation time; the environmental parameters at least comprise environmental humidity and environmental air pressure;
setting an operation state coefficient according to the operation parameter;
correcting and compensating the running state coefficient according to the environmental parameter;
and judging the operation safety of the asynchronous motor according to the compensated operation state coefficient, and controlling the operation of the asynchronous motor according to the operation safety judgment result.
2. The motor drive control method according to claim 1, characterized in that setting an operation state coefficient according to the operation parameter and the environmental parameter includes:
acquiring a frequency influence coefficient according to the motor frequency; acquiring a temperature influence coefficient according to the temperature of the motor;
acquiring an operation state coefficient H=M+N+Ta/T; wherein M is a frequency influence coefficient, N is a temperature influence coefficient, ta is the running time of the motor, and T is a preset motor running period.
3. The motor drive control method according to claim 2, characterized in that obtaining a frequency influence coefficient from the motor frequency includes:
comparing the motor frequency A of the asynchronous motor with a preset motor frequency;
if A < A1, judging that the motor frequency is lower, and setting a frequency influence coefficient to be M2=M1+M1× (A1-A)/A; wherein A is the motor frequency; a1 is a first preset motor frequency; m1 is a first preset frequency influence coefficient;
if A1 is more than or equal to A2, judging that the motor frequency is normal, and setting a frequency influence coefficient as M1; a2 is a second preset motor frequency;
if A2 is more than A and less than or equal to Amax, judging that the motor frequency is higher, and setting a frequency influence coefficient to be M3=M1+M1× (a-A2)/A2; amax is a preset maximum motor frequency;
and if A is more than Amax, judging that the motor frequency is too high, and controlling the asynchronous motor to stop running.
4. The motor drive control method according to claim 3, characterized by obtaining a frequency influence coefficient from the motor frequency, further comprising:
acquiring a historical operation maximum frequency Aa of the asynchronous motor;
if the motor frequency A is less than or equal to Aa, maintaining the frequency influence coefficient as a current value Mi; i=1 or i=2;
if the motor frequency A > Aa, the frequency influence coefficient is adjusted to Mi' =Mi+Mix (a-Aa)/A.
5. The motor drive control method according to claim 2, characterized in that acquiring a temperature influence coefficient from the motor temperature includes:
comparing the motor temperature C of the asynchronous motor with a preset standard motor temperature;
if C is less than or equal to C0, judging that the temperature of the motor is normal, and setting a temperature influence coefficient as N1; n1 is a first preset temperature influence coefficient; c0 is the first standard motor temperature;
if C0 is less than C and less than or equal to Cmax, judging that the temperature of the motor is higher, and setting a temperature influence coefficient to be N2=N1+N1× (C-C0)/C0; cmax is the preset maximum motor temperature;
if C > Cmax, judging that the temperature of the motor is too high, and controlling the asynchronous motor to stop running.
6. The motor drive control method according to claim 5, characterized in that the temperature influence coefficient is obtained from the motor temperature, further comprising:
acquiring a historical running highest temperature Ca of the asynchronous motor;
if the temperature C of the motor is less than or equal to Ca, maintaining the temperature influence coefficient to be a current value Ni; i=1 or i=2;
and if the motor temperature C > Ca, adjusting the temperature influence coefficient to be Ni' =Ni+Ni× (C-Ca)/C.
7. The motor drive control method according to claim 1, characterized in that correcting and compensating the operation state coefficient according to the value of the environmental parameter includes:
comparing the environment humidity G of the asynchronous motor with a preset perspective humidity G0; if G is less than or equal to G0, judging that the ambient humidity is normal, and not correcting the running state coefficient; if G > G0, correcting the running state coefficient to H' =h+h× (G-G0)/G; h is the initial value of the running state coefficient;
comparing the ambient air pressure K of the asynchronous motor with preset ambient air pressure K0; if K < K0, compensating the operation state coefficient to be H "=H '+H' × (K0-K)/K0; when K is more than or equal to K0, the ambient air pressure is judged to be normal, and the running state coefficient is not compensated.
8. The motor drive control method according to claim 1, wherein determining the operation safety of the asynchronous motor based on the compensated operation state coefficient, and controlling the operation of the asynchronous motor based on the operation safety determination result, comprises:
comparing the compensated running state coefficient H' with a preset running state coefficient;
if H is less than or equal to H1, judging that the asynchronous motor is in a normal running state, and maintaining the running period of the asynchronous motor as a preset running period of the motor; h1 is a first preset running state coefficient;
if H1 is less than H and less than or equal to H2, judging that the asynchronous motor is in a risk running state, and shortening the running period of the asynchronous motor; h2 is a second preset operating state coefficient;
if H2 is less than H ", judging that the asynchronous motor is in an abnormal running state, and controlling the asynchronous motor to stop running.
9. The motor drive control method according to claim 8, characterized by shortening a motor operation cycle of the asynchronous motor, comprising:
setting the shortened motor operation period to be T ' =T-T× (H ' -H1)/H '; t, presetting a motor operation period; wherein, if T '< Tmin, then T' =tmin is set; tmin is a preset minimum running period of the motor;
comparing the shortened running period T' of the asynchronous motor with the running time Ta of the motor;
if T' is less than or equal to Ta, controlling the asynchronous motor to stop running;
if T '> Ta, maintaining the operation of the asynchronous motor to a motor operation period T'.
10. A motor drive control apparatus adapted to the motor drive control method according to any one of claims 1 to 9, comprising:
the acquisition module is used for acquiring the operation parameters and the environment parameters of the asynchronous motor in real time; the operation parameters at least comprise motor frequency, motor temperature and motor operation time; the environmental parameters at least comprise environmental humidity and environmental air pressure;
the analysis module is used for setting an operation state coefficient according to the operation parameter, and correcting and compensating the operation state coefficient according to the environment parameter;
and the control module is used for judging the operation safety of the asynchronous motor according to the compensated operation state coefficient and controlling the operation of the asynchronous motor according to the operation safety judgment result.
CN202311567432.6A 2023-11-22 2023-11-22 Motor drive control method and device Pending CN117559354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311567432.6A CN117559354A (en) 2023-11-22 2023-11-22 Motor drive control method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311567432.6A CN117559354A (en) 2023-11-22 2023-11-22 Motor drive control method and device

Publications (1)

Publication Number Publication Date
CN117559354A true CN117559354A (en) 2024-02-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311567432.6A Pending CN117559354A (en) 2023-11-22 2023-11-22 Motor drive control method and device

Country Status (1)

Country Link
CN (1) CN117559354A (en)

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