CN111111902B - Switched reluctance motor speed regulating system for ceramic ball mill - Google Patents
Switched reluctance motor speed regulating system for ceramic ball mill Download PDFInfo
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- CN111111902B CN111111902B CN202010117733.9A CN202010117733A CN111111902B CN 111111902 B CN111111902 B CN 111111902B CN 202010117733 A CN202010117733 A CN 202010117733A CN 111111902 B CN111111902 B CN 111111902B
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- reluctance motor
- switched reluctance
- ball mill
- ceramic ball
- rotating speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/24—Driving mechanisms
Abstract
The invention discloses a switched reluctance motor speed regulating system for a ceramic ball mill, which belongs to the field of energy-saving application of ball mills in the ceramic industry, and comprises the following components: the device comprises a controller, a switched reluctance motor, an encoder, a ceramic ball mill, a speed reducer and a switch cabinet; the rotating speed of the ceramic ball mill is adjusted by controlling the rotating speed of the switched reluctance motor through the controller. When the ceramic ball mill is started, the switched reluctance motor is in soft start according to the slope set by the controller, the starting current is small, and the impact on equipment is reduced. When the ceramic ball mill normally operates, the automatic control of the operating speed and the operating time of coarse grinding, medium grinding and fine grinding of the ceramic ball mill is realized by preprogramming the controller, so that the ceramic ball mill system is in a high-efficiency operating state in the whole process of starting and operating, the ball milling time of the ceramic ball mill is shortened, the yield is increased, the installed capacity of a transformer of a ceramic ball mill plant is reduced, and meanwhile, the automatic process management is realized.
Description
Technical Field
The invention relates to the field of energy-saving application of ball mills in the ceramic industry, in particular to a switched reluctance motor speed regulating system for a ceramic ball mill.
Background
The ceramic ball mill in the early stage adopts an asynchronous motor as a dragging system, the ceramic ball mill is mainly started by adopting self-coupling voltage reduction, soft start, frequency conversion and the like, the adopted self-coupling voltage reduction starting mode is adopted, the starting current of a motor can reach 6-7 times of the rated current of the motor, the soft start mode is adopted in the later stage, the starting current of the motor reaches 4-5 times of the rated current of the motor, the frequency conversion starting mode is adopted at most at present, the starting current of the motor can also reach 2-3 times of the rated current of the motor, the starting modes cause too large impact on a transformer power grid, large voltage fluctuation, power factor reduction and overlarge starting power consumption, and the aging degree of mechanical transmission facilities equipped with a contactor and a ceramic ball mill in a starting cabinet is accelerated.
At present ceramic ball mill mainly adopts the mode of power frequency constant speed to grind the material, adopt the grinding mode of power frequency constant speed, the material is after a period of grinding, the material is smashed, fill in the space of rinding body, if still keep original speed operation this moment, will only make a small amount of material obtain grinding, if can change the speed of ball-milling this moment, thereby let the speed of ceramic ball mill fall to certain rotational speed and make rinding body and material realize abundant friction, then can improve the grinding efficiency of ball mill greatly, if the running speed of unreasonable reduction ceramic ball mill body, not only can not reach the grinding effect, on the contrary, consequently reasonable adjustment barrel running speed according to the relation between grinding medium and the material granularity can effectual improvement ball mill work efficiency.
The ceramic ball mill is characterized in that the rotation speed of the ceramic ball mill is determined by the diameter of a ball tank of the ceramic ball mill, and the ball mill is allowed to keep a constant rotation speed to ensure that the ball can achieve the grinding effect.
Disclosure of Invention
The invention aims to solve the technical problems of large impact on a transformer power grid, large voltage fluctuation, reduced power factor, overlarge power consumption for starting and quick aging of a contactor arranged in a starting cabinet and a mechanical transmission facility arranged in a ball mill caused by motor starting, and simultaneously adopts multi-stage speed control to improve the grinding efficiency of a ceramic ball mill, save energy consumption, ensure that the whole system works in an optimal running state, and has high reliability, strong economy and convenient operation and maintenance.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a switched reluctance motor speed control system for ceramic ball mill which characterized in that: the device comprises a switched reluctance motor, an encoder, a ceramic ball mill, a speed reducer and a switch cabinet; the switch cabinet comprises a controller, a breaker QF, a starting switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5; the controller is connected with the switched reluctance motor through six cables of U1, U2, V1, V2, W1 and W2 to drive the switched reluctance motor to operate; the encoder detects the encoding information of the switched reluctance motor; the switched reluctance motor drives the ceramic ball mill to operate through the speed reducer.
The control method of the switched reluctance motor speed regulating system for the ceramic ball mill comprises the following steps:
step one, closing the breaker QF and connecting a controller power supply.
And step two, dividing the operation mode of the ceramic ball mill into a high-grinding operation mode, a medium-grinding operation mode and a low-grinding operation mode according to the working condition of the ceramic ball mill, wherein the initial mode is the high-grinding operation mode.
And step three, setting the initial rotating speed of the high grinding operation mode to be V0, the running time to be T1, the initial rotating speed of the medium grinding operation mode to be V1, the running time to be T2, the initial rotating speed of the low grinding operation mode to be V2, the running time to be T3 and the finishing rotating speed of the low grinding operation mode to be V3.
And step four, setting the initial working rotating speed of the switched reluctance motor to be 0, setting the starting slope of the switched reluctance motor to be k, setting the instantaneous reference rotating speed in the starting process to be V x = kV0t, setting t to be time, and setting the value range of k to be 0 < k < 1.
And step five, closing a starting switch K1, starting a switched reluctance motor, carrying out soft start operation on the switched reluctance motor by taking the reference rotating speed V as the reference, and driving the ceramic ball mill to work in a high-grinding operation mode when the rotating speed V0 is reached.
And sixthly, in the high grinding operation mode, the operation rotating speed of the switched reluctance motor is changed into variable speed operation according to V = V0+ ((V1-V0)/T1) T, and when the rotating speed reaches V1, the switched reluctance motor is switched to the middle grinding operation mode.
And seventhly, in the middle grinding operation mode, the operation rotating speed of the switched reluctance motor is changed into variable speed operation according to V = V1+ ((V2-V1)/T2) T, and when the rotating speed reaches V2, the low grinding operation mode is switched.
And step eight, in the low grinding operation mode, the operation rotating speed of the switched reluctance motor is operated at a variable speed according to V = V2+ ((V3-V2)/T3) T.
And step nine, when the rotating speed reaches V3, the controller automatically seals the drive pulse of the switched reluctance motor, the switched reluctance motor is shut down, and the ceramic ball mill stops running.
Furthermore, the controller consists of a rectifier, a power converter, a direct-current voltage sampling circuit, a driving circuit, a load voltage and current sampling circuit and a main control board, wherein the main control board is connected with the power converter for driving the switched reluctance motor to operate through the driving circuit; the main control board is also respectively connected with a direct current voltage sampling circuit, a load voltage current sampling circuit, an encoder, a control switch and a key; the main control board calculates the rotating speed of the switched reluctance motor and the position of a rotor after acquiring coding information of the encoder, the direct-current voltage sampling circuit acquires bus voltage, the load voltage and current sampling circuit acquires load voltage and current, the control switch, the keys and the main control board are electrically connected and used for controlling the operation and the warning function of a system, and a main control chip of the main control board consists of a DSP (digital signal processor) and an FPGA (field programmable gate array).
Further, the control switch and the keys are composed of a breaker QF, a start switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5.
Compared with the prior art, the invention has the beneficial effects that:
1. the ceramic ball mill is driven by the switched reluctance motor, the switched reluctance motor has the characteristics of small starting current and large starting torque, and 150% of starting torque can be output when the starting current is 30%. Meanwhile, the switched reluctance motor has excellent soft start performance, the soft start time is set, the soft start current is adjusted, the huge impact on mechanical parts and power grids during the start of the ceramic ball mill is completely eliminated, the service life of parts such as a ball mill belt, a bearing, a wave box and the like can be effectively prolonged while electricity is saved, the defects of difficult start of the ball mill, large start current, ageing, frequent damage and the like of a machine and a control cabinet are thoroughly solved, and the operation cost is reduced.
2. According to the change of the ball milling operation, the invention is divided into multi-stage speed operation from coarse grinding to fine grinding, so that the grinding body and the material can fully rub in each grinding stage, the optimal production process is achieved, the grinding efficiency of the ball mill is greatly improved, and the energy-saving operation is realized.
3. According to the invention, the grinding speed and the grinding time of the ceramic ball mill are adjusted by an algorithm according to different types and thicknesses of materials, so that the materials are fully ground, the grinding time is greatly reduced, and the production efficiency of the ceramic ball mill is improved.
Drawings
Fig. 1 is a block diagram of a switched reluctance motor speed control system for a ceramic ball mill according to an embodiment of the present invention.
Fig. 2 is a block diagram of a controller according to an embodiment of the present invention.
Fig. 3 is a flow chart of a control method of the speed regulating system of the switched reluctance motor of the invention.
In the figure: a controller 1; a switched reluctance motor 2; an encoder 3; a ceramic ball mill 4; a speed reducer 5; a switch cabinet 6; a rectifier 7; a power converter 8; a direct-current voltage sampling circuit 9; a drive circuit 10; a load voltage current sampling circuit 11; control switches and buttons 12; a main control board 13.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the switched reluctance motor speed regulating system for the ceramic ball mill is characterized in that: the device comprises a switched reluctance motor 2, an encoder 3, a ceramic ball mill 4, a speed reducer 5 and a switch cabinet 6; the switch cabinet 6 comprises a controller 1, a breaker QF, a starting switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5; the controller 1 is connected with the switched reluctance motor 2 through six cables of U1, U2, V1, V2, W1 and W2 to drive the switched reluctance motor 2 to operate; the encoder 3 detects the encoding information of the switched reluctance motor 2; the switched reluctance motor 2 drives the ceramic ball mill 4 to operate through the speed reducer 5.
The three-phase alternating current is connected to the RST terminal of the switch cabinet 6 through the breaker QF, and when the system has an overcurrent or short-circuit fault, the breaker QF is automatically disconnected to cut off the three-phase power supply.
When the switched reluctance motor 2 is in a shutdown state, the starting switch K1 is pressed, and the switched reluctance motor 2 starts to start to operate; in the operation process, the pause switch K2 is pressed, the switched reluctance motor 2 stops operating, the operation state of the system is saved at the moment, and when the switched reluctance motor is started next time, the switched reluctance motor 2 continues operating from the saved state; at any time when the ceramic ball mill 4 normally operates, the stop button K3 is pressed, and the switched reluctance motor 2 stops operating; when the speed regulating system of the switched reluctance motor 2 for the ceramic ball mill 4 fails, the acousto-optic signal output indicator K4 sends out an acousto-optic alarm signal to inform a user that failure occurs and fault detection is needed; when the fault signal is eliminated, the release acousto-optic prompting switch K5 is pressed, and the fault alarm signal is released.
The switch cabinet 6 is electrically connected with the encoder 3 through six lines of 111 and 115, the six electrical connection lines comprise three encoding lines and two power lines.
FIG. 3 is a control process of the switched reluctance motor speed control system for the ceramic ball mill of the present invention, which comprises the following steps:
step one, closing the breaker QF and connecting the power supply of the control cabinet 1.
And step two, dividing the ceramic ball mill 4 into a high grinding operation mode, a medium grinding operation mode and a low grinding operation mode according to the working condition of the ceramic ball mill 4, wherein the initial mode is the high grinding mode.
And step three, setting the initial rotating speed of the high grinding mode to be V0, the running time to be T1, the initial rotating speed of the medium grinding mode to be V1, the running time to be T2, the initial rotating speed of the high grinding mode to be V2, the running time to be T2 and the finishing rotating speed of the high grinding mode to be V3.
And step four, setting the initial working rotating speed of the switched reluctance motor 2 to be 0, setting the starting slope of the switched reluctance motor 2 to be k, setting the instantaneous reference rotating speed in the starting process to be V x = kV0t, setting t to be time, and setting the value range of k to be 0 < k < 1.
And step five, closing a switch K1, starting the switched reluctance motor 2, performing soft start operation on the switched reluctance motor 2 by taking the reference rotating speed V as the reference, and driving the ceramic ball mill 4 to work in a high grinding operation mode by the switched reluctance motor 2 when the rotating speed V0 is reached.
And sixthly, in the high grinding mode, the running rotating speed of the switched reluctance motor 2 is changed into variable speed running according to V = V0+ ((V1-V0)/T1) T, and when the speed reaches V1, the switched reluctance motor is switched to the middle grinding mode.
And seventhly, in the middle grinding mode, the running rotating speed of the switched reluctance motor 2 is changed into variable speed running according to V = V1+ ((V2-V1)/T2) T, and when the speed reaches V2, the switched reluctance motor is switched to the middle grinding mode.
And step eight, in the low grinding mode, the running speed of the switched reluctance motor 2 is changed into variable speed according to V = V2+ ((V3-V2)/T3) T.
Step nine, when the speed reaches V3, the controller 1 automatically seals the driving pulse of the switched reluctance motor 2, the switched reluctance motor 2 is shut down, and the ceramic ball mill 4 stops running.
As shown in fig. 2, the controller of the present invention includes a rectifier 7, a power converter 8, a dc voltage sampling circuit 9, a driving circuit 10, a load voltage and current sampling circuit 11, and a main control board 13; the main control board 13 is connected with a power converter 8 for driving the switched reluctance motor 2 to run through a driving circuit 10; the main control board 13 is also connected with a direct-current voltage sampling circuit 9, a load voltage current sampling circuit 11, an encoder 3, a control switch and a key 12 respectively; the main control board 13 calculates the rotating speed of the switched reluctance motor and the position of the rotor after acquiring the coding information of the coder 3, the direct-current voltage sampling circuit 9 acquires bus voltage, the load voltage and current sampling circuit 11 acquires load voltage and current, the control switch, the keys and the main control board 13 are electrically connected and used for controlling the operation and the warning function of a system, and a main control chip of the main control board 13 consists of a DSP and an FPGA.
The main control board 13 controls the power converter 8 through the driving circuit 10 for driving the switched reluctance motor 2 to operate. The main control board 13 collects bus voltage and load voltage current through the direct current voltage sampling circuit 9 and the load voltage current sampling circuit 11 for voltage and current closed-loop control, and the main control board 13 collects the rotating speed of the switched reluctance motor 2 through the encoder 3 for closed-loop adjustment of the rotating speed of the ceramic ball mill 4.
The control switch and the key 12 consist of a breaker QF, a starting switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5.
Claims (3)
1. The utility model provides a switched reluctance motor speed control system for ceramic ball mill which characterized in that: comprises a switched reluctance motor (2), an encoder (3), a ceramic ball mill (4), a speed reducer (5) and a switch cabinet (6); the switch cabinet (6) comprises a controller (1), a breaker QF, a starting switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5; the controller (1) is connected with the switched reluctance motor (2) through six cables of U1, U2, V1, V2, W1 and W2 to drive the switched reluctance motor (2) to operate; the encoder (3) detects the encoding information of the switched reluctance motor (2); the switched reluctance motor (2) drives the ceramic ball mill (4) to operate through the speed reducer (5);
the control method of the switched reluctance motor speed regulating system for the ceramic ball mill comprises the following steps:
step one, closing a breaker QF, and connecting a power supply of a controller (1);
secondly, dividing the operation mode of the ceramic ball mill (4) into a high-grinding operation mode, a medium-grinding operation mode and a low-grinding operation mode according to the working condition of the ceramic ball mill (4), wherein the initial mode is the high-grinding operation mode;
setting the initial rotating speed of a high-grinding operation mode to be V0, the running time to be T1, the initial rotating speed of a medium-grinding operation mode to be V1, the running time to be T2, the initial rotating speed of a low-grinding operation mode to be V2, the running time to be T3 and the finishing rotating speed of the low-grinding operation mode to be V3;
setting the initial working rotating speed of the switched reluctance motor (2) to be 0, setting the starting slope of the switched reluctance motor (2) to be k, setting the instantaneous reference rotating speed in the starting process to be V x = kV0t, setting t to be time, and setting the value range of k to be 0 < k < 1;
step five, closing a starting switch K1, starting the switched reluctance motor (2), carrying out soft start operation on the switched reluctance motor (2) by taking a reference rotating speed V as a reference, and driving the ceramic ball mill (4) to work in a high grinding operation mode by the switched reluctance motor (2) when the rotating speed V0 is reached;
step six, in a high grinding operation mode, the operation rotating speed of the switched reluctance motor (2) is changed into variable speed operation according to V = V0+ ((V1-V0)/T1) T, and when the rotating speed reaches V1, the switched reluctance motor is switched to a middle grinding operation mode;
seventhly, in the middle grinding operation mode, the operation rotating speed of the switched reluctance motor (2) is changed into variable speed operation according to V = V1+ ((V2-V1)/T2) T, and when the rotating speed reaches V2, the switched reluctance motor is switched to the low grinding operation mode;
step eight, in a low grinding operation mode, the operation rotating speed of the switched reluctance motor (2) is changed into variable speed operation according to V = V2+ ((V3-V2)/T3) T;
step nine, when the rotating speed reaches V3, the controller (1) automatically seals the driving pulse of the switched reluctance motor (2), the switched reluctance motor (2) is shut down, and the ceramic ball mill (4) stops running.
2. The switched reluctance motor speed regulating system for the ceramic ball mill according to claim 1, wherein: the controller (1) is composed of a rectifier (7), a power converter (8), a direct-current voltage sampling circuit (9), a driving circuit (10), a load voltage and current sampling circuit (11) and a main control board (13), and the main control board (13) is connected with the power converter (8) used for driving the switched reluctance motor (2) to operate through the driving circuit (10); the main control board (13) is also respectively connected with a direct-current voltage sampling circuit (9), a load voltage and current sampling circuit (11), an encoder (3), a control switch and a key (12); the main control board (13) calculates the rotating speed of the switched reluctance motor and the position of a rotor after acquiring coding information of the coder (3), the direct-current voltage sampling circuit (9) acquires bus voltage, the load voltage and current sampling circuit (11) acquires load voltage and current, the control switch and the key (12) are electrically connected with the main control board (13) and used for controlling the operation and warning functions of a system, and a main control chip of the main control board (13) consists of a DSP (digital signal processor) and an FPGA (field programmable gate array).
3. The switched reluctance motor speed regulating system for the ceramic ball mill according to claim 2, wherein: the control switch and the key (12) are composed of a breaker QF, a starting switch K1, a pause switch K2, a stop button K3, an acousto-optic prompt signal output indicator K4 and a de-acousto-optic prompt switch K5.
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| CN114950701B (en) * | 2022-07-28 | 2022-12-30 | 中国电力科学研究院有限公司 | Intelligent energy terminal, system and operation control method for industrial ball mill |
| CN117040353B (en) * | 2023-06-06 | 2024-03-12 | 成都署信科技有限公司 | Speed regulating system and control method of switch reluctance motor for punch press |
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