CN116651308B - Control method of rotating speed self-setting stirring device and stirring device - Google Patents
Control method of rotating speed self-setting stirring device and stirring device Download PDFInfo
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- CN116651308B CN116651308B CN202310946451.3A CN202310946451A CN116651308B CN 116651308 B CN116651308 B CN 116651308B CN 202310946451 A CN202310946451 A CN 202310946451A CN 116651308 B CN116651308 B CN 116651308B
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- 238000003756 stirring Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000013019 agitation Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2214—Speed during the operation
- B01F35/22142—Speed of the mixing device during the operation
- B01F35/221422—Speed of rotation of the mixing axis, stirrer or receptacle during the operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/212—Measuring of the driving system data, e.g. torque, speed or power data
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/33—Transmissions; Means for modifying the speed or direction of rotation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The application discloses a control method of a rotating speed self-setting stirring device, which comprises the following steps: s100: presetting n stirring stages, n groups of set rotating speeds, n groups of initial rotating speeds and n groups of set current thresholds in a control unit of a frequency converter; s200: controlling a driving motor to stir at a corresponding initial rotating speed within the duration of each stirring stage; s300: monitoring the output rotating speed of the driving motor in real time in the duration of each stirring stage, obtaining a real-time current value I according to the feedback of the frequency converter, and if the output rotating speed is lower than V, performing S400; if the output rotation speed is higher than V, S500 is performed; s400: comparing the I with a set current threshold in real time, and adjusting the output rotating speed according to the comparison result until reaching a set rotating speed V; s500: the control output rotation speed is reduced to the set rotation speed V. A stirring device capable of implementing the control method is also disclosed. By using the application, manual intervention can be omitted, current overload can be avoided, and thus stirring efficiency can be improved.
Description
Technical Field
The application relates to the technical field of stirring equipment, in particular to a control method of a rotating speed self-setting stirring device and the stirring device.
Background
Lithium ion batteries are a new generation of green high-energy batteries with excellent performance, and have become one of the key points of high-tech development. The lithium ion battery has the following characteristics: high voltage, high capacity, low consumption, no memory effect, no pollution, small volume, small internal resistance, less self discharge and more cycle times. Because of the characteristics, the lithium ion power battery is applied to various civil and military fields such as passenger cars, electric buses, special vehicles, energy storage and the like. The lithium ion battery slurry has different forms at different stages in the stirring process, and correspondingly different shearing forces are needed to obtain good product performance. In the prior art, a large amount of experiments and experiences are used for obtaining corresponding stirring process parameters for a certain type of product, and the stirring process parameters are used for controlling the driving motor to perform stirring operation (namely, controlling the output rotating speed, the output torque and the like of the driving motor to be adjusted in different time periods) in actual work. However, there are unavoidable differences between each stirring operation, and the following problems occur when the driving motor is mechanically controlled according to a specific set of stirring parameters to perform the stirring operation: for non-Newtonian fluid or high-solid-content high-viscosity slurry, under the condition that the viscosity is too high and a large moment is required, the operation according to preset stirring parameters easily causes current overload, and the driving motor is stopped after the current overload, so that manual intervention is required, the stirring efficiency is reduced, and the service life of the driving motor is influenced.
Disclosure of Invention
The present application aims to solve one of the technical problems in the related art to a certain extent. Therefore, the application provides a control method of a rotating speed self-setting stirring device and the stirring device.
In order to achieve the above purpose, the application adopts the following technical scheme: the control method of the rotating speed self-setting stirring device comprises a driving motor and a frequency converter electrically connected with the driving motor, wherein the frequency converter is provided with a control unit, and the control method comprises the following steps of:
s100: presetting n stirring stages, n groups of set rotating speeds V corresponding to the stirring stages one by one, n groups of initial rotating speeds corresponding to the stirring stages one by one and n groups of set current thresholds corresponding to the stirring stages one by one in a control unit of the frequency converter, wherein the set current thresholds are smaller than the maximum output current of a driving motorThe initial rotation speed is smaller than the corresponding set rotation speed V;
s200: according to the sequence of the n stirring stages, controlling a driving motor to stir at a corresponding initial rotating speed in the duration of each stirring stage;
s300: monitoring the output rotating speed of the driving motor in real time in the duration of each stirring stage, obtaining a real-time current value I according to the feedback of the frequency converter, and if the output rotating speed is lower than a set rotating speed V, performing step S400; if the output rotation speed is higher than the set rotation speed V, performing step S500;
s400: comparing the I with a set current threshold in real time, and adjusting the output rotating speed according to the comparison result of the I and the set current threshold until reaching a set rotating speed V;
s500: and controlling the output rotating speed to be reduced to a set rotating speed V.
The application of the application has the following beneficial effects: the whole stirring process is set to n stirring stages, a set rotating speed V is preset in each stirring stage according to requirements (the final product quality can be good by using the set rotating speed V for stirring in the stage), the output rotating speed of the driving motor is regulated in each stage through the comparison result of the real-time current value and the set current threshold value, and the initial rotating speed is gradually and automatically regulated to the set rotating speed in a self-tuning mode. By the mode, manual intervention can be omitted, and stirring time is saved; the overload condition can be avoided, the service life of the driving motor can be prolonged, and the stirring time can be saved.
Optionally, adjusting the output rotation speed according to the comparison result of the I and the set current threshold until reaching the set rotation speed V includes the following steps:
s410: if the I is smaller than the set current threshold, the output rotation speed is controlled to be increased by a set value, and the output rotation speed after being increased is stirred for a set time, and then the step S420 is performed; if the I is greater than the set current threshold, stirring for a set time at the current output rotation speed, and then performing step S400;
s420: comparing the increased output rotation speed with the set rotation speed V, and if the increased output rotation speed is less than the set rotation speed V, proceeding to S410; if the increased output rotation speed is greater than the set rotation speed V, step S500 is performed.
Therefore, the output rotating speed can be adjusted section by section, and the problem that I is too large due to the fact that the one-time adjustment amplitude is too large is avoided.
Optionally, there is a speed difference V between the current output speed and a set speed V, where the set value is a selected value between 5% V and 15% V.
Optionally, the set time is a selected value between 60s and 180 s.
Optionally, n is a selected value between 4 and 10; the duration of the agitation phase is a selected value between 10min and 60 min.
Optionally, the initial rotational speed is a selected value between 20% v and 60% v.
Optionally, the set current threshold is 80%To 99% >>And at least two of the n sets of the set current thresholds are different.
Optionally, the set rotational speed V is a selected value between 50rpm and 1200rpm, and at least two of the n sets of set rotational speeds V are different.
In addition, the application also provides a rotating speed self-setting stirring device, which comprises: a tank body, in which a cavity is formed; the stirring blade stretches into the containing cavity and is used for stirring the slurry put into the containing cavity; a driving motor for driving the stirring blade to rotate; and a frequency converter electrically connected with the driving motor; the frequency converter has a control unit configured to be able to execute the rotation speed self-tuning stirring device control method according to any one of the above-described claims.
The stirring device provided by the application is similar to the beneficial effect reasoning process of the control method, and is not repeated here.
Optionally, a transmission mechanism is arranged between the driving motor and the stirring paddle, and the transmission mechanism is provided with a rotation speed sensor for monitoring the output rotation speed of the driving motor in real time.
These features and advantages of the present application will be disclosed in more detail in the following detailed description and the accompanying drawings. The best mode or means of the present application will be described in detail with reference to the accompanying drawings, but is not limited to the technical scheme of the present application. In addition, these features, elements, and components are shown in plural in each of the following and drawings, and are labeled with different symbols or numerals for convenience of description, but each denote a component of the same or similar construction or function.
Drawings
The application is further described below with reference to the accompanying drawings:
fig. 1 is a flowchart of a control method of a rotational speed self-tuning stirring device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples in the embodiments are intended to illustrate the present application and are not to be construed as limiting the present application.
Reference in the specification to "one embodiment" or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
Examples: the embodiment provides a control method of a rotating speed self-setting stirring device, which is used for controlling a driving motor and a frequency converter in the stirring device, in particular, the frequency converter is electrically connected with the driving motor, and the frequency converter is provided with a control unit, and the control unit can execute the control method provided by the embodiment. The control method comprises the following steps:
s100: the control unit of the frequency converter is preset with n stirring stages, n groups of set rotating speeds V corresponding to the stirring stages one by one, n groups of initial rotating speeds corresponding to the stirring stages one by one and n groups of set current thresholds corresponding to the stirring stages one by one, wherein the set current thresholds are smaller than the maximum output current of the driving motorThe initial rotation speed is smaller than the corresponding set rotation speed V;
s200: according to the sequence of the n stirring stages, controlling a driving motor to stir at a corresponding initial rotating speed in the duration of each stirring stage;
s300: monitoring the output rotating speed of the driving motor in real time in the duration of each stirring stage, obtaining a real-time current value I according to the feedback of the frequency converter, and if the output rotating speed is lower than a set rotating speed V, performing step S400; if the output rotation speed is higher than the set rotation speed V, step S500 is performed;
s400: comparing the I with a set current threshold in real time, and adjusting the output rotating speed according to the comparison result of the I and the set current threshold until reaching a set rotating speed V;
s500: the control output rotation speed is reduced to the set rotation speed V.
The inventor refers to the scheme simply as a rotating speed self-setting control mode, preset stirring operation control parameters and set control programs for a control unit of the frequency converter, acquire a real-time current value I by using feedback of the frequency converter, and automatically adjust the output rotating speed to the set rotating speed by using a comparison result of the I and the set current threshold. When the control method is applied, the whole stirring process is set to n stirring stages, a set rotating speed V is preset in each stirring stage according to requirements (the set rotating speed V is used for stirring in the stage to enable the quality of a final product to be good), the output rotating speed of the driving motor is regulated in each stage through a comparison result of a real-time current value and a set current threshold value, and the initial rotating speed is gradually and automatically regulated to the set rotating speed in a self-setting mode. By the mode, manual intervention can be omitted, and stirring time is saved; the overload condition can be avoided, the service life of the driving motor can be prolonged, and the stirring time can be saved.
Specifically, adjusting the output rotation speed according to the comparison result of the I and the set current threshold until the set rotation speed V is reached includes the following steps:
s410: if I is smaller than the set current threshold, the output rotation speed is controlled to increase by a set value, and the output rotation speed after the increase is stirred for a set time is performed in step S420; if the I is greater than the set current threshold, stirring for a set time at the current output rotation speed, and then performing step S400;
s420: comparing the increased output rotation speed with the set rotation speed V, and if the increased output rotation speed is less than the set rotation speed V, proceeding to S410; if the increased output rotation speed is greater than the set rotation speed V, step S500 is performed;
wherein the set time is a selected value between 60s and 180 s.
Therefore, the output rotating speed can be adjusted section by section, and the problem that I is too large due to the fact that the one-time adjustment amplitude is too large is avoided. Further, since the initial rotation speed is smaller than the set rotation speed, before the output rotation speed is not adjusted to the set rotation speed, a speed difference V is formed between the current output rotation speed and the set rotation speed V, and in order to ensure the adjustment accuracy and avoid excessive I caused by excessive one-time adjustment, the set value is set to 10% >, V in this embodiment. It will be appreciated that in various embodiments, the set point may be a selected value between 5% father V and 15% father V. In summary, when the output rotation speed is adjusted, the current output rotation speed is compared with the set rotation speed every set time, and S400 or S500 is performed according to the comparison result. And then comparing the real-time current value I with a set current threshold value, and performing steps S410 and S420 according to the comparison result.
Depending on the slurry characteristics of the different products, the operator may choose to divide the stirring operation into n stirring phases according to experimental data or experience, in particular n may be a selected value between 4 and 10. The duration of each agitation phase may be set according to the characteristics of the slurry and the amount of slurry, and typically the duration of the agitation phase is a selected value between 10 minutes and 60 minutes, and typically the duration of the initial agitation phase is relatively short.
In addition, other parameters in the control method obtain a reference range for different products and stirring amounts through a plurality of experiments, and in general, the initial rotating speed is a selected value between 20% V and 60% V, and at least two stirring stages in the n stirring stages are different in initial rotating speed; setting the current threshold value to 80%To 99% >>At least two of the n sets of set current thresholds are different; the set rotational speed V is a selected value between 50rpm and 1200rpm, and at least two of the n sets of set rotational speeds V are different.
The control method provided in this embodiment has commonality with the control method adopted in the prior art: when stirring is performed for different products and different amounts of single stirring, the stirring rotation speed parameter needs to be set in advance through experiments or experience brought about in long-term actual work. The control method provided by the embodiment has the advantages that: instead of stirring at the ideal set rotational speed in the whole stirring stage, stirring is performed at an initial rotational speed lower than the set rotational speed, so that overload phenomenon is avoided in a period of time just beginning each stirring stage. In each stirring stage, as stirring is carried out, the slurry is fully mixed, the resistance of the stirring blade is smaller, the current overload problem is less likely to occur at the moment, and accordingly, the output rotating speed can be adjusted to an ideal set rotating speed through a self-setting automatic speed regulation mode. In the adjusting process, the condition that the output rotating speed is slightly larger than the set rotating speed possibly occurs, and the output rotating speed can be also adjusted to the set rotating speed in a self-setting speed-adjusting mode.
Taking experiments for preparing the negative electrode graphite slurry product as an example, powder required to be added for preparing the negative electrode graphite slurry product is MAG-TL3 negative electrode main material, liquid is CMC glue solution, and the mass of the powder required to be added for preparing the negative electrode graphite slurry product is MAG-TL3 negative electrode main material (15 kg) and CMC glue solution (10.3 kg/pure 1.5 kg) respectively. The control method is used for controlling the stirring device to perform stirring operation, 6 stirring stages are preset, and parameter values such as duration, initial rotation speed, set current threshold, set value and set time of each stirring stage are respectively set. The stirring operation process is as follows:
powder and liquid are thrown in at one time;
each parameter value is preset, and the parameter values are set in the following table:
starting up to stir until the stirring operation is finished.
When the control method provided by the embodiment is applied, the stirring device can be a stirring device in the prior art, and the stirring device can be improved. Existing stirring devices generally comprise the following components: tank body, stirring vane, driving motor and converter, wherein, the internal portion of tank is formed with holds the chamber, and stirring vane stretches into to holding the intracavity and is used for stirring the thick liquids of throwing into holding the intracavity, and driving motor is used for driving stirring vane and rotates, and the converter is connected with the driving motor electricity. The frequency converter has a control unit, and the improvement of the embodiment is that parameter values and control programs are preset in the control unit, specifically, the control unit can execute the control method provided by the embodiment through the preset parameter values and control programs. Further, in this embodiment, a transmission mechanism is disposed between the driving motor and the stirring paddle, specifically, in this embodiment, a belt pulley is used as the transmission mechanism, and a rotation speed sensor for monitoring the output rotation speed of the driving motor in real time is disposed on the transmission mechanism. The actual output rotating speed of the driving motor is accurately monitored in real time through a rotating speed sensor of the facility.
The above is only a specific embodiment of the present application, but the scope of the present application is not limited thereto, and it should be understood by those skilled in the art that the present application includes but is not limited to the accompanying drawings and the description of the above specific embodiment. Any modifications which do not depart from the functional and structural principles of the present application are intended to be included within the scope of the appended claims.
Claims (7)
1. The control method of the rotating speed self-tuning stirring device is characterized by comprising the following steps of:
s100: presetting n stirring stages, n groups of set rotating speeds V corresponding to the stirring stages one by one, n groups of initial rotating speeds corresponding to the stirring stages one by one and n groups of set current thresholds corresponding to the stirring stages one by one in a control unit of a frequency converter, wherein the set current thresholds are set by the control unit of the frequency converterLess than the maximum output current of the drive motorThe initial rotation speed is smaller than the corresponding set rotation speed V;
the set rotating speed V is a selected value between 50rpm and 1200rpm, and at least two of n groups of the set rotating speeds V are different; the initial rotational speed is a selected value between 20% v and 60% v, and the initial rotational speeds in at least two of the n agitation phases are different; the set current threshold is 80%To 99% >>At least two of the n groups of the set current thresholds are different;
s200: according to the sequence of the n stirring stages, controlling a driving motor to stir at a corresponding initial rotating speed in the duration of each stirring stage;
s300: monitoring the output rotating speed of the driving motor in real time in the duration of each stirring stage, obtaining a real-time current value I according to the feedback of the frequency converter, and if the output rotating speed is lower than a set rotating speed V, performing step S400; if the output rotation speed is higher than the set rotation speed V, performing step S500;
s400: comparing the I with a set current threshold in real time, and adjusting the output rotating speed according to the comparison result of the I and the set current threshold until reaching a set rotating speed V;
s500: and controlling the output rotating speed to be reduced to a set rotating speed V.
2. The method of controlling a rotational speed self-tuning stirring device according to claim 1, wherein adjusting the output rotational speed until reaching the set rotational speed V based on a comparison result of I with the set current threshold value comprises the steps of:
s410: if the I is smaller than the set current threshold, the output rotation speed is controlled to be increased by a set value, and the output rotation speed after being increased is stirred for a set time, and then the step S420 is performed; if the I is greater than the set current threshold, stirring for a set time at the current output rotation speed, and then performing step S400;
s420: comparing the increased output rotation speed with the set rotation speed V, and if the increased output rotation speed is less than the set rotation speed V, proceeding to S410; if the increased output rotation speed is greater than the set rotation speed V, step S500 is performed.
3. A method of controlling a rotational speed self-tuning mixer apparatus as defined in claim 2, wherein there is a speed difference V between the current output rotational speed and a set rotational speed V, the set value being a selected value between 5% fatv and 15% fatv.
4. The method of controlling a rotational speed self-tuning stirring device according to claim 2, wherein the set time is a selected value between 60s and 180 s.
5. A method of controlling a rotational speed self-tuning stirring device as defined in claim 1, wherein n is a selected value between 4 and 10, and the duration of the stirring phase is a selected value between 10min and 60 min.
6. A rotational speed self-tuning stirring device, comprising:
a tank body, in which a cavity is formed;
the stirring blade stretches into the containing cavity and is used for stirring the slurry put into the containing cavity;
a driving motor for driving the stirring blade to rotate; the method comprises the steps of,
a frequency converter electrically connected with the driving motor;
characterized in that the frequency converter has a control unit configured to be able to perform the rotational speed self-tuning stirring device control method according to any one of claims 1 to 5.
7. The rotational speed self-tuning stirring apparatus of claim 6, wherein a transmission mechanism is provided between the driving motor and the stirring paddle, and the transmission mechanism is provided with a rotational speed sensor for monitoring the output rotational speed of the driving motor in real time.
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| IT202000026807A1 (en) * | 2020-11-11 | 2022-05-11 | Ergolines Lab S R L | METHOD OF CONTROL OF SHAKING DEVICE AND SHAKING DEVICE |
| CN114732078A (en) * | 2021-03-29 | 2022-07-12 | 中绅科技(广东)有限公司 | Method for controlling rotating speed of stirring motor of ice cream machine based on temperature and forming degree |
| CN113364305A (en) * | 2021-05-08 | 2021-09-07 | 黄石东贝压缩机有限公司 | Frequency converter for controlling rotating speed of variable frequency compressor and control method thereof |
| CN113290695A (en) * | 2021-07-26 | 2021-08-24 | 中国恩菲工程技术有限公司 | Filling slurry concentration regulation and control method and system based on current signal feedback |
| CN115607023A (en) * | 2022-10-31 | 2023-01-17 | 广东新宝电器股份有限公司 | Stirring equipment logic control method and circuit and stirring equipment |
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