CN204287863U - The major-minor motor adaptive control system of stalk block making machine - Google Patents
The major-minor motor adaptive control system of stalk block making machine Download PDFInfo
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- CN204287863U CN204287863U CN201420815532.6U CN201420815532U CN204287863U CN 204287863 U CN204287863 U CN 204287863U CN 201420815532 U CN201420815532 U CN 201420815532U CN 204287863 U CN204287863 U CN 204287863U
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Abstract
The major-minor motor adaptive control system of a kind of stalk block making machine, by the tested wire working current of Hall current sensor monitoring stalk briquette mair motor, the voltage signal transmitted from Hall current sensor is processed into digital signal and exports by single machine unit, DA converting unit converts the digital signal that single machine unit exports to analog output, the analog quantity that DA converting unit is changed out by the first voltage follow unit is carried out voltage follow and exports, the voltage signal that first voltage follow unit exports is carried out operation amplifier output by operation amplifier unit, frequency converter unit carries out variable frequency control according to receiving the voltage signal amplified to mass transport motor.This control system is by the frequency-variable controller of this signal feedback to mass transport motor, the rotating speed of mass transport motor is controlled, realize the adaptive control of major-minor motor load, improve production efficiency of equipment and intelligence degree, increase stalk block making machine serviceable life.
Description
Technical field
The utility model relates to stalk treatment facility control technology field, particularly the major-minor motor adaptive control system of a kind of stalk block making machine.
Background technology
Stalk block making machine is that the biomass material such as stalk is pulverized the equipment that efficient, environment-friendly fuel or feed are made in compression.The briquetting mair motor working current of stalk block making machine can change by the inlet of biomass material at work, when internal body biomass material is more, stalk block making machine is larger to its pressure, now briquetting mair motor working current must increase, and there is the uneven problem of material loading in the mass transport motor of general stalk block making machine, time many time few, if it is still very large now to go up doses, the situation extremely easily causing body to block, has had a strong impact on production efficiency and the serviceable life of cuber.In addition, also can there is cuber sky and run phenomenon, cause waste of energy, to such an extent as to increase production cost.
Utility model content
The utility model provides a kind of stalk block making machine major-minor motor adaptive control system, existing stalk block making machine can be overcome cause body to block because material loading is uneven to such an extent as to affect the production efficiency of cuber and the shortcoming in serviceable life, the adaptive control of briquetting mair motor and mass transport motor load can be realized, improve production efficiency of equipment and intelligence degree, reduce costs simultaneously.
The technical solution of the utility model is achieved in that
The major-minor motor adaptive control system of a kind of stalk block making machine, comprise: Hall current sensor circuit unit, single machine unit, DA conversion unit, first voltage follow unit, operation amplifier unit, frequency converter unit and internal electric source unit, the voltage output end of described Hall current sensor circuit unit connects the AD interface of single machine unit, single machine unit comprises single-chip microcomputer, the output terminal of single-chip microcomputer connects DA converting unit, described DA converting unit output terminal connects the first voltage follow unit successively, operation amplifier unit and frequency converter unit, the tested wire of briquetting mair motor penetrates in the magnetic core of Hall current sensor circuit unit setting, the output terminal of frequency converter unit connects mass transport motor, internal electric source unit connects Hall current sensor circuit unit respectively, single machine unit, first voltage follow unit, DA conversion unit, operation amplifier unit and frequency converter unit,
Wherein:
Hall current sensor, the tested wire working current of monitoring stalk briquette mair motor, the working current signal of detection is converted into voltage signal and exports by Hall current sensor,
Single machine unit, is processed into digital signal and exports by the voltage signal transmitted from Hall current sensor,
DA converting unit, converts the digital signal that single machine unit exports to analog output,
First voltage follow unit, analog quantity DA converting unit changed out is carried out voltage follow and exports,
Operation amplifier unit, carries out operation amplifier output by the voltage signal that the first voltage follow unit exports,
Frequency converter unit, carries out variable frequency control according to receiving the voltage signal amplified to mass transport motor.
Described Hall current sensor circuit unit comprises three tunnels, and described three road Hall current sensor circuit units are monitored the electric current of briquetting mair motor three-phase electricity respectively, and three road electric currents can be averaged, and increases monitoring accuracy.
System also comprises the second voltage follow unit, described Hall current sensor circuit unit connects the AD interface of single machine unit by the second voltage follow unit, described second voltage follow unit mainly plays isolation, buffer action, avoids some pulse signals on the impact of monitor signal.
The LCD display unit comprised and button are to show motor three-phase electricity flow valuve in real time, described LCD display unit is connected single machine unit respectively with button, described LCD display unit connects internal electric source unit, and can by pressing controlling value and the ultimate value of key assignments current of electric, single machine unit carries out data transmission by serial communication and LCD display unit.
Wherein, described single machine unit adopts the inner STC12C5A60S2 chip carrying the AD interface on 10,8 tunnel, 8 road AD interfaces meet the requirement of three-phase electricity monitoring, the singlechip chip of this signal is mainly for Electric Machine Control, antijamming capability is strong, and the fast 8-12 of more traditional 51 series monolithic of processing speed doubly.
Described operation amplifier unit adopts track to track OPA2735 chip, and adopt this track to track type amplifier, the output voltage after amplification can accomplish closely supply voltage scope, generally only has less than supply voltage scope several millivolts or tens millivolts.
Frequency converter unit adopts VFD007B43A frequency converter, and described VFD007B43A frequency converter has the characteristic of light and handy volume and quiet running; In addition, this frequency converter adopts multiple-protection technology, significantly improves the jamproof ability of complete machine.
Compared with prior art, the utility model has following beneficial effect:
1, the major-minor motor adaptive control system of stalk block making machine of the present utility model, over-current sensor extracts the current signal of briquetting mair motor, by the frequency-variable controller of this signal feedback to mass transport motor, the rotating speed of mass transport motor is controlled, realize the adaptive control of major-minor motor load, improve production efficiency of equipment and intelligence degree, increase stalk block making machine serviceable life;
2, the utility model solves briquetting mair motor idle running phenomenon simultaneously, and saves energy, reduces cost.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the major-minor motor adaptive control system of the utility model stalk block making machine;
Fig. 2 is the circuit theory diagrams of the major-minor motor adaptive control system of the utility model stalk block making machine;
Fig. 3 is the utility model closed loop Hall current sensor circuit theory diagrams;
Fig. 4 is based on LTS 25-NP Hall element current detecting schematic diagram;
Fig. 5 is briquetting Main motor current observation circuit schematic diagram;
Fig. 6 is frequency conversion control circuit schematic diagram;
Fig. 7 is internal electric source element circuit schematic diagram;
Fig. 8 is LCD display unit and key circuit schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As Fig. 1, 2, the major-minor motor adaptive control system of a kind of stalk block making machine, comprise: Hall current sensor circuit unit, single machine unit, DA conversion unit, first voltage follow unit, operation amplifier unit, frequency converter unit and internal electric source unit (not shown in figure 1), the voltage output end of described Hall current sensor circuit unit connects the AD interface of single machine unit, single machine unit comprises single-chip microcomputer, the output terminal of single-chip microcomputer connects DA converting unit, described DA converting unit output terminal connects the first voltage follow unit successively, operation amplifier unit and frequency converter unit, the tested wire of briquetting mair motor penetrates in the magnetic core of Hall current sensor circuit unit setting, the output terminal of frequency converter unit connects mass transport motor, internal electric source unit connects Hall current sensor circuit unit respectively, single machine unit, first voltage follow unit, DA conversion unit, operation amplifier unit and frequency converter unit,
Wherein:
Hall current sensor, the tested wire working current of monitoring stalk briquette mair motor, the working current signal of detection is converted into voltage signal and exports by Hall current sensor,
Single machine unit, the AD mouth of described Hall current sensor access single-chip microcomputer, voltage signal enters single-chip microcomputer by AD mouth, and voltage signal is processed into digital signal through single machine unit and exports,
DA converting unit, single machine unit, by its output digit signals, converts analog output to through DA converting unit,
First voltage follow unit, the analog quantity that DA converting unit is changed out enters the first voltage follow unit and carries out voltage follow and export,
Operation amplifier unit, enters operation amplifier unit through the voltage signal of voltage follow unit and carries out operation amplifier output,
Frequency converter unit, frequency converter unit carries out variable frequency control according to receiving the voltage signal amplified to mass transport motor.
Described Hall current sensor circuit unit comprises three tunnels, and described three road Hall current sensor circuit units are monitored the electric current of briquetting mair motor three-phase electricity respectively, and three road electric currents can be averaged, and increases monitoring accuracy.
System also comprises the second voltage follow unit, described Hall current sensor circuit unit connects the AD interface of single machine unit by the second voltage follow unit, described second voltage follow unit mainly plays isolation, buffer action, avoids some pulse signals on the impact of monitor signal.
The LCD display unit comprised and button are to show motor three-phase electricity flow valuve in real time, described LCD display unit is connected single machine unit respectively with button, described LCD display unit connects internal electric source unit, and can by pressing controlling value and the ultimate value of key assignments current of electric, single machine unit carries out data transmission by serial communication and LCD display unit.
Wherein, described single machine unit adopts the inner STC12C5A60S2 chip carrying the AD interface on 10,8 tunnel, 8 road AD interfaces meet the requirement of three-phase electricity monitoring, the singlechip chip of this signal is mainly for Electric Machine Control, antijamming capability is strong, and the fast 8-12 of more traditional 51 series monolithic of processing speed doubly.
Described operation amplifier unit adopts track to track OPA2735 chip, and adopt this track to track type amplifier, the output voltage after amplification can accomplish closely supply voltage scope, generally only has less than supply voltage scope several millivolts or tens millivolts.
Frequency converter unit adopts VFD007B43A frequency converter, and described VFD007B43A frequency converter has the characteristic of light and handy volume and quiet running; In addition, this frequency converter adopts multiple-protection technology, significantly improves the jamproof ability of complete machine.
This utility model is specifically described below in conjunction with example.
Hall current sensor circuit unit adopts closed loop current sensor, as shown in Figure 3, it is a kind of compensation sensor, the i.e. magnetic field that produces at magnetism gathering rings place of major loop measured current I p, compensate with the magnetic field that the electric current by secondary coil produces, thus make hall device be in the duty detecting Zero flux.Specific works process is: when the tested wire of briquetting mair motor has an electric current to pass through, the magnetic field that wire produces is assembled by magnetism gathering rings and is sensed on hall device, the signal produced exports for driving corresponding power tube and making its conducting, thus obtains an offset current Is.This electric current produces magnetic field by multicircuit winding again, and this magnetic field is just in time contrary with the magnetic field that tested electric current produces, and thus compensate for original magnetic field, and the output of hall device is reduced gradually.When being multiplied equal with the magnetic field that " primary current is multiplied with the number of turn " produces with Is with the number of turn, Is no longer increases, thus reaches magnetic balance.Any change of tested electric current all can destroy this balance, once magnetic field out of trim, hall device just has signal to export, after power amplification, just corresponding electric current I s is had to flow through secondary winding to compensate unbalance magnetic field immediately, unbalance to again balancing from magnetic field, less than 1us on required time theory, this is the process of a mobile equilibrium.Like this, as long as record the small area analysis of compensating coil, just former limit big current can be calculated.This current sensor, the complete and tested current electrical isolation of secondary coil electric current, has good measuring accuracy and the linearity,
The mair motor of general stalk block making machine is three phase alternating current motor, and power is 35KW, according to threephase motor rating formula:
Wherein, U is line voltage 380V, I is line current, and η is work efficiency,
for power factor, generally get 0.7-0.9.Therefore line current computing formula is:
Estimation current maxima should be less than 100A, and actual current is greatly within the scope of 50A-80A.
Current detecting principle, as shown in Figure 4:
Tested wire is through the hole of LTS 25-NP Hall element, primary current is Ip, and the output voltage of Hall current sensor is Vo, and the A/D interface that superpotential follow circuit directly accesses single machine unit carries out AD conversion, obtain Vo value, then calculate primary current Ip according to following formula:
Vo＝2.5+0.625×Ip/Ipn
Wherein, Ipn is rated current 20A.
Native system cuber mair motor actual current scope is about Is=50-80A, then between Vo=4-4.5V, meet the voltage measurement requirement of single-chip microcomputer, can amplifying circuit be connect like this, only direct need be connected and can meet the demands with single machine unit A/D interface at output termination one voltage follower circuit.
Hardware design part:
(1) as shown in Figure 5, because mair motor is three phase electric machine, in order to the curent change of each phase of Real-Time Monitoring, native system have employed three Hall current sensors, monitor the electric current of three-phase simultaneously, each road current sensor output voltage signal, and the AD mouth of single machine unit is entered through voltage follower circuit.Voltage follower circuit mainly plays isolation, buffer action, and this project have employed track to track OPA2735, ensure that voltage follow scope.Single-chip microcomputer have employed STC12C5A60S2 chip, and inside carries the AD mouth on 10,8 tunnel.
(2) as shown in Figure 6, native system adopts single-chip microcomputer output digit signals, converts analog quantity to through DA, follows through amplifier and circuit the frequency that the analog voltage input port being input to frequency converter controls frequency converter.DA converting unit have employed MCP4725 chip, it be 12 for have nonvolatile memory (EEPROM) single channel 12 bit buffering voltage export DAC, 2 line I2C compliant serial interfaces can be used, and be the single power supply of 2.7V to 5.5V by voltage range, output voltage range is 0-Vdd, and output voltage is calculated by following formula:
In formula, D
nfor the output code of single-chip microcomputer.
(3) as shown in Figure 7, native system has mainly used 12V and 5V two kinds of power supplys, and system adopts the power supply of Switching Power Supply as PCB of 12V for this reason, exports 5V power supply in circuit board through voltage transitions.
(4) as shown in Figure 8, in order to show motor three-phase electricity flow valuve in real time, native system adds LCD display unit, and can by pressing controlling value and the ultimate value of key assignments mass transport current of electric, and single-chip microcomputer carries out data transmission by serial communication and LCD display unit.
To sum up configuration and principle of the present utility model is known, the major-minor motor adaptive control system of stalk block making machine of the present utility model, the major-minor motor adaptive control system of stalk block making machine of the present utility model, over-current sensor extracts the current signal of briquetting mair motor, by the frequency-variable controller of this signal feedback to mass transport motor, the rotating speed of mass transport motor is controlled, realize the adaptive control of major-minor motor load, improve production efficiency of equipment and intelligence degree, increase stalk block making machine serviceable life; The utility model solves briquetting mair motor idle running phenomenon simultaneously, and saves energy, reduces cost.
Claims (7)
1. the major-minor motor adaptive control system of stalk block making machine, it is characterized in that, comprise: Hall current sensor circuit unit, single machine unit, DA conversion unit, first voltage follow unit, operation amplifier unit, frequency converter unit and internal electric source unit, the voltage output end of described Hall current sensor circuit unit connects the AD interface of single machine unit, single machine unit comprises single-chip microcomputer, the output terminal of single-chip microcomputer connects DA converting unit, described DA converting unit output terminal connects the first voltage follow unit successively, operation amplifier unit and frequency converter unit, the tested wire of briquetting mair motor penetrates in the magnetic core of Hall current sensor circuit unit setting, the output terminal of frequency converter unit connects mass transport motor, internal electric source unit connects Hall current sensor circuit unit respectively, single machine unit, first voltage follow unit, DA conversion unit, operation amplifier unit and frequency converter unit,
Wherein:
Hall current sensor, the tested wire working current of monitoring stalk briquette mair motor, the working current signal of detection is converted into voltage signal and exports by Hall current sensor,
Single machine unit, is processed into digital signal and exports by the voltage signal transmitted from Hall current sensor,
DA converting unit, converts the digital signal that single machine unit exports to analog output,
First voltage follow unit, analog quantity DA converting unit changed out is carried out voltage follow and exports,
Operation amplifier unit, carries out operation amplifier output by the voltage signal that the first voltage follow unit exports,
Frequency converter unit, carries out variable frequency control according to receiving the voltage signal amplified to mass transport motor.
2. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1, it is characterized in that, described Hall current sensor circuit unit comprises three tunnels, and described three road Hall current sensor circuit units are monitored the electric current of briquetting mair motor three-phase electricity respectively.
3. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1 or 2, is characterized in that, also comprise the second voltage follow unit, and described Hall current sensor circuit unit connects the AD interface of single machine unit by the second voltage follow unit.
4. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1 or 2, it is characterized in that, also comprise LCD display unit and button, described LCD display unit is connected single machine unit respectively with button, and described LCD display unit connects internal electric source unit.
5. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1 or 2, is characterized in that, described single machine unit adopts the inner STC12C5A60S2 chip carrying the AD interface on 10,8 tunnel.
6. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1 or 2, is characterized in that, described operation amplifier unit adopts track to track OPA2735 chip.
7. the major-minor motor adaptive control system of stalk block making machine as claimed in claim 1 or 2, is characterized in that, frequency converter unit adopts VFD007B43A frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420815532.6U CN204287863U (en) | 2014-12-19 | 2014-12-19 | The major-minor motor adaptive control system of stalk block making machine |
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| CN201420815532.6U CN204287863U (en) | 2014-12-19 | 2014-12-19 | The major-minor motor adaptive control system of stalk block making machine |
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| CN204287863U true CN204287863U (en) | 2015-04-22 |
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| CN201420815532.6U Expired - Fee Related CN204287863U (en) | 2014-12-19 | 2014-12-19 | The major-minor motor adaptive control system of stalk block making machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570859A (en) * | 2014-12-19 | 2015-04-29 | 徐州工程学院 | Self-adaptive control system for main motor and auxiliary motor of straw briquetting machine |
| CN106208901A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Garbage crushing motor protective circuit |
| CN106301145A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | Garbage crushing motor running protection Circuits System |
| CN106452282A (en) * | 2016-08-31 | 2017-02-22 | 苏州迈力电器有限公司 | Garbage crushing motor protecting circuit system |
-
2014
- 2014-12-19 CN CN201420815532.6U patent/CN204287863U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570859A (en) * | 2014-12-19 | 2015-04-29 | 徐州工程学院 | Self-adaptive control system for main motor and auxiliary motor of straw briquetting machine |
| CN106208901A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Garbage crushing motor protective circuit |
| CN106301145A (en) * | 2016-08-31 | 2017-01-04 | 苏州迈力电器有限公司 | Garbage crushing motor running protection Circuits System |
| CN106452282A (en) * | 2016-08-31 | 2017-02-22 | 苏州迈力电器有限公司 | Garbage crushing motor protecting circuit system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151219 |
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| EXPY | Termination of patent right or utility model |