CN101797529A - Frequency conversion power saving control method of ball mill - Google Patents
Frequency conversion power saving control method of ball mill Download PDFInfo
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- CN101797529A CN101797529A CN200910189073A CN200910189073A CN101797529A CN 101797529 A CN101797529 A CN 101797529A CN 200910189073 A CN200910189073 A CN 200910189073A CN 200910189073 A CN200910189073 A CN 200910189073A CN 101797529 A CN101797529 A CN 101797529A
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Abstract
The invention discloses a frequency conversion power saving control method of a ball mill, which is realized with the following method: 1. starting a ball mill, and initializing a preset controller in the ball mill; 2. operating the ball mill according to the preset frequency; 3. detecting the stator current instantaneous value of the stator current of the AC asynchronous motor of the ball mill, and detecting the stator current instantaneous value by a U\V\W three-phase current Hall sensor arranged in a transducer; 4. calculating the average torque current, current undulation frequency and amplitude of the stator current of the AC asynchronous motor of the ball mill, obtaining the current torque component, current undulation frequency and amplitude according to the rotor magnetic field orientation and vector change on a synchronous rotating coordinate system; 5. in the grinding initial stage, controlling the cylinder of the ball mill to carry out pendular movement according to the calculation result so as to obtain the effect that a dielectric sphere and grinding material are in parabola falling state in the cylinder; and 6. in the middle and later grinding stage, controlling frequency to continuously drop according to the control frequency calculation result of a loading torque.
Description
Technical field
The present invention relates to a kind of frequency conversion power saving control method of ball mill.
Background technology
In industries such as pottery, cement, chemical industry, building materials, ball mill is very important equipment, and its power is big, long operational time.Modes such as not speed governing of power frequency, electromagnetic speed-adjusting or frequency control are generally adopted in the control of ball mill at present.Wherein the variable frequency regulating speed control mode is flexible, the precision height, and good reliability is more and more adopted.The multistage speed setting means that adopt promptly preestablish the multistage grinding rate in a milling cycle, every section certain time more in existing ball mill VFC.Grinding rate and milling time are rule of thumb set.But every batch of abrasive material quality, material, granular size all have difference in actual production; therefore predefined speed and time are difficult to reach good; moreover; because grinding rate and the deviation of time overmastication usually can occur or grind not enough situation; the different batches fineness differs greatly; product quality also be difficult to guarantee, its electric energy expends hugely in addition, is unfavorable for energy-conservation.
Summary of the invention
The object of the present invention is to provide a kind of Grinding Quality that can increase ball mill can also save the frequency conversion power saving control method of ball mill of the power consumption of ball mill simultaneously greatly.
For achieving the above object, the invention provides a kind of frequency conversion power saving control method of ball mill, it is mainly realized by the following method:
The first step: open the controller that preset ball mill and initialization ball mill inside.
Second step: ball mill moves by predetermined frequency.
The 3rd step: detect the stator current instantaneous value of stator current of the AC induction motor of ball mill, its U by being preset in the frequency converter inside in the ball mill V W three-phase current Hall element record the stator current instantaneous value.
The 4th step: average torque electric current, current fluctuation frequency, the amplitude of the stator current of the AC induction motor of calculating ball mill, rotor field-oriented by pressing on synchronous rotating frame, the vector conversion obtains torque component, current fluctuation amplitude and the frequency of electric current.
The 5th step: the grinding initial stage stage, do pendular movement according to the cylindrical shell of result of calculation control ball mill, remain medium ball and abrasive material is the parabola falling state to reach in cylindrical shell.
The 6th step: grind mid-term and later stage, according to the controlled frequency result calculated of load torque, controlled frequency constantly descends.
The invention has the advantages that: the Grinding Quality that can increase ball mill can also be saved the power consumption of ball mill simultaneously greatly.
Description of drawings
Fig. 1 is an operation step map of the present invention.
The specific embodiment
Please refer to Fig. 1, the present invention be further described below in conjunction with following embodiment:
A kind of frequency conversion power saving control method of ball mill, it is mainly realized by the following method:
The first step: open the controller that preset ball mill and initialization ball mill inside.
Second step: ball mill moves by predetermined frequency.
The 3rd step: detect the stator current instantaneous value of stator current of the AC induction motor of ball mill, its U by being preset in the frequency converter inside in the ball mill V W three-phase current Hall element record the stator current instantaneous value.
The 4th step: average torque electric current, current fluctuation frequency, the amplitude of the stator current of the AC induction motor of calculating ball mill, rotor field-oriented by pressing on synchronous rotating frame, the vector conversion obtains torque component, current fluctuation amplitude and the frequency of electric current.
The 5th step: the grinding initial stage stage, do pendular movement according to the cylindrical shell of result of calculation control ball mill, remain medium ball and abrasive material is the parabola falling state to reach in cylindrical shell.
The 6th step: the mid-term of grinding and later stage, according to the controlled frequency result calculated of load torque, controlled frequency constantly descends.
Operating principle of the present invention is as follows: can be decomposed into exciting current and torque current owing to be installed in the stator current of the AC induction motor in the ball mill, wherein exciting current is used to produce magnetic flux, and torque current produces electronic torque.Electronic torque is used to drive the load rotation.Ball mill is when grinding, and the abrasive grain during beginning is big, and is inhomogeneous, the torque current cyclic fluctuation is big, according to the decomposition of feedback current, obtains torque current period of change and amplitude, judge the size and the state of current abrasive grain, adjust the rotating speed and the running time of ball mill automatically with this.In milling cycle abrasive grains from coarse to fine, the rotating speed of ball mill also from high to low, remaining medium ball and abrasive material is the parabola falling state, the material generation strong effect of impact of medium ball at the bottom of like this to tube, efficient is for the highest.
Described stator current instantaneous value can by the inner U of frequency converter V W three-phase current Hall element record, by on synchronous rotating frame by rotor field-oriented, the vector conversion obtains the torque component of electric current.When torque current fluctuation amplitude and frequency all greater than initial set value, then an abrasive material is adjacent to barrel and moves in a circle in the tube, this moment, the frequency converter output frequency was excessive, grinding efficiency is low, need reduce drum speed; If the current fluctuation frequency near 1/2 cylindrical shell speed, thinks then to enter reasonable rotating speed interval that medium ball is done projectile motion; If the current fluctuation frequency limits less than minimum frequency, think that then drum speed is slow, medium ball is no longer done projectile motion.
In a milling cycle, the initial stage abrasive grain is big, and is inhomogeneous, and the traditional scheme cylindrical shell can only be done unidirectional rotation, can't utilize abrasive material self potential energy.By making cylindrical shell do pendular movement, change traffic direction among the present invention, the potential energy that rushes down of medium ball and abrasive material is converted into kinetic energy when rotating to the certain angle frequency converter, the counter motion of promotion cylindrical shell, this method also can be avoided frequency converter overcurrent or overvoltage.Middle and later grinding stage is no longer done pendular movement, control cylindrical shell unidirectional running, and speed is 0.7 times to 0.8 times of critical speed, guarantees that medium ball does projectile motion, increases fineness and uniformity.Frequency converter can be judged to be in which grinding stage and to export suitable FREQUENCY CONTROL cylindrical shell and is in optimum speed according to torque current vibration frequency and amplitude and accumulative total milling time in sum, improves product quality and production efficiency.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any pro forma restriction; though the present invention discloses as above with preferred embodiment; yet be not in order to limit the present invention; any those skilled in the art; in not breaking away from the technical solution of the present invention scope; when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations; in every case be the content that does not break away from technical solution of the present invention; according to technical spirit of the present invention to any simple modification that above embodiment did; equivalent variations and modification all still belong in the protection domain of technical solution of the present invention.
Claims (1)
1. the frequency conversion power saving control method of a ball mill is characterized in that: it is mainly realized by the following method: the first step: open the controller that preset ball mill and initialization ball mill inside; Second step: ball mill moves by predetermined frequency; The 3rd step: detect the stator current instantaneous value of stator current of the AC induction motor of ball mill, its U by being preset in the frequency converter inside in the ball mill V W three-phase current Hall element record the stator current instantaneous value; The 4th step: average torque electric current, current fluctuation frequency, the amplitude of the stator current of the AC induction motor of calculating ball mill, rotor field-oriented by pressing on synchronous rotating frame, the vector conversion obtains torque component, current fluctuation amplitude and the frequency of electric current; The 5th step: grinding initial stage, do pendular movement according to the cylindrical shell of result of calculation control ball mill, remain medium ball and abrasive material is the parabola falling state to reach in cylindrical shell; The 6th step: grind mid-term and later stage, according to the controlled frequency result calculated of load torque, controlled frequency constantly descends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910189073A CN101797529A (en) | 2009-12-18 | 2009-12-18 | Frequency conversion power saving control method of ball mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910189073A CN101797529A (en) | 2009-12-18 | 2009-12-18 | Frequency conversion power saving control method of ball mill |
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| CN101797529A true CN101797529A (en) | 2010-08-11 |
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| CN200910189073A Pending CN101797529A (en) | 2009-12-18 | 2009-12-18 | Frequency conversion power saving control method of ball mill |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179278A (en) * | 2011-03-28 | 2011-09-14 | 山东理工大学 | Automatic speed regulation system and method for ball milling machine |
| CN103128642A (en) * | 2011-11-29 | 2013-06-05 | 广州市珠峰电气有限公司 | Tile polishing machine and dedicated automatic-control electricity saving system |
| CN104668051A (en) * | 2015-03-13 | 2015-06-03 | 苏州圣谱拉新材料科技有限公司 | Automatic speed control ball mill |
| CN105425709A (en) * | 2015-12-18 | 2016-03-23 | 杨斌 | Remote monitoring and management system of ball mills based on wireless access into Internet and equipment of same |
| CN106712588A (en) * | 2017-02-24 | 2017-05-24 | 上海电机系统节能工程技术研究中心有限公司 | Variable frequency starting device and method |
| CN109433341A (en) * | 2018-10-31 | 2019-03-08 | 江苏脒诺甫纳米材料有限公司 | Zircon sand Ultrafine Grinding method |
| CN111298952A (en) * | 2020-03-31 | 2020-06-19 | 唐山贺祥机电股份有限公司 | Control method for time-interval variable-speed variable-frequency automatic operation of ball mill |
| CN114870958A (en) * | 2022-06-10 | 2022-08-09 | 广东家美陶瓷有限公司 | Electric control system and control method of ceramic continuous ball mill and ball milling and pulping method |
-
2009
- 2009-12-18 CN CN200910189073A patent/CN101797529A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179278A (en) * | 2011-03-28 | 2011-09-14 | 山东理工大学 | Automatic speed regulation system and method for ball milling machine |
| CN102179278B (en) * | 2011-03-28 | 2013-07-17 | 山东理工大学 | Automatic speed regulation system of ball milling machine and method therefor |
| CN103128642A (en) * | 2011-11-29 | 2013-06-05 | 广州市珠峰电气有限公司 | Tile polishing machine and dedicated automatic-control electricity saving system |
| CN104668051A (en) * | 2015-03-13 | 2015-06-03 | 苏州圣谱拉新材料科技有限公司 | Automatic speed control ball mill |
| CN105425709A (en) * | 2015-12-18 | 2016-03-23 | 杨斌 | Remote monitoring and management system of ball mills based on wireless access into Internet and equipment of same |
| CN106712588A (en) * | 2017-02-24 | 2017-05-24 | 上海电机系统节能工程技术研究中心有限公司 | Variable frequency starting device and method |
| CN106712588B (en) * | 2017-02-24 | 2019-10-15 | 上海电机系统节能工程技术研究中心有限公司 | A kind of static frequency converter and method |
| CN109433341A (en) * | 2018-10-31 | 2019-03-08 | 江苏脒诺甫纳米材料有限公司 | Zircon sand Ultrafine Grinding method |
| CN111298952A (en) * | 2020-03-31 | 2020-06-19 | 唐山贺祥机电股份有限公司 | Control method for time-interval variable-speed variable-frequency automatic operation of ball mill |
| CN114870958A (en) * | 2022-06-10 | 2022-08-09 | 广东家美陶瓷有限公司 | Electric control system and control method of ceramic continuous ball mill and ball milling and pulping method |
| CN114870958B (en) * | 2022-06-10 | 2024-05-07 | 广东家美陶瓷有限公司 | Electronic control system, control method and ball milling pulping method of ceramic continuous ball mill |
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Addressee: Flextronics Shenzhen City Electric Co,, Ltd. Document name: Notification of an Office Action |
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Application publication date: 20100811 |