CN106222701A - A kind of based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit - Google Patents
A kind of based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit Download PDFInfo
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- CN106222701A CN106222701A CN201610620701.4A CN201610620701A CN106222701A CN 106222701 A CN106222701 A CN 106222701A CN 201610620701 A CN201610620701 A CN 201610620701A CN 106222701 A CN106222701 A CN 106222701A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000004411 aluminium Substances 0.000 title claims abstract description 26
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims abstract description 91
- 230000005669 field effect Effects 0.000 claims abstract description 29
- 101001074567 Chamaecyparis formosensis Alpha pinene synthase, chloroplastic Proteins 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 34
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/20—Automatic control or regulation of cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/14—Devices for feeding or crust breaking
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit, it is characterized in that, mainly by control chip U, transformator T, concentration sensor QW, diode D9, Zener diode D6, polar capacitor C14, low-pass filter circuit, voltage regulator circuit, the field effect micro-processor interface circuit being connected with control chip U and transformator T-phase respectively, and the comparison amplifying circuit composition being serially connected between voltage regulator circuit and field effect micro-processor interface circuit.The present invention can by concentration sensor QW export the signal of telecommunication in because of interference signal produced by harmonic wave eliminate or suppress, the signal of telecommunication making concentration sensor QW export is smoother and more accurate；Effectively ensure that the present invention accuracy to signal processing；And the present invention to being adjusted the high transient state of voltage and current, can also prevent the frequency of electric current from drift occur, makes voltage and current held stationary.
Description
Technical field
The present invention relates to field of aluminum electrolysis, specifically refer to a kind of based on the auto feed control used for aluminium electrolysis comparing amplifying circuit
System processed.
Background technology
Aluminum electrolysis uses molten-salt electrolysis technique, makees equipment with aluminium cell, and aluminium oxide makees electrolysis raw material, with ice
Spar electrolyte dissolution aluminium oxide generates metallic aluminium through electrochemical reaction.Dissolve aluminium oxide in the electrolyte in electrolytic process
Constantly consume, aluminium cell has several alumina reservoir and several alumina feeding device.Present alumina feeding device
All using volumetric feeder to realize, the duty of volumetric feeder is then by oxidation by Loading Control System
The collection result of aluminum concentration signal controls.The production target of aluminium electroloysis is or excellent, depends primarily on alumina concentration control
The most accurate.
But, existing aluminium oxide auto feed control system used for aluminium electrolysis is easily subject to interference, and occurs to signal
Manage inaccurate problem, cause volumetric feeder in aluminium electrolysis process accurately not feed to electrolysis bath, cause aluminium oxide
Concentration occurs that fluctuation aluminium electroloysis is unable to reach excellent production target；And existing aluminium oxide auto feed used for aluminium electrolysis controls
System there is also the problem that output voltage is unstable.
Therefore it provides signal can accurately be processed by one, can ensure that again the oxygen used for aluminium electrolysis of output voltage stabilization
Changing aluminum auto feed control system is the task of top priority.
Summary of the invention
It is an object of the invention to overcome aluminium oxide auto feed control system used for aluminium electrolysis of the prior art to signal
Process inaccurate, and the defect that output voltage is unstable, it is provided that a kind of automatically add based on comparing the used for aluminium electrolysis of amplifying circuit
Material control system.
The purpose of the present invention realizes by following technical scheme: a kind of based on the auto feed used for aluminium electrolysis comparing amplifying circuit
Control system, mainly by control chip U, transformator T, limit former with transformator T, concentration sensor QW, N pole inductance coil of the same name
End is connected, diode D9, P pole that P pole is connected with the CC pin of control chip U after resistance R15 after resistance R14 with control
The Zener diode D6 that the VS pin of coremaking sheet U is connected, N pole is connected with the COM pin of control chip U, positive pole and transformation
Ground connection after the non-same polarity of device T secondary inductance coil is connected, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil
Polar capacitor C14, be serially connected in the low-pass filter circuit between the IN pin of concentration sensor QW and control chip U, respectively with
The voltage regulator circuit that the CF pin of control chip U is connected with CM pin and PWM pin, respectively with control chip U and change
The field effect micro-processor interface circuit that depressor T-phase connects, and be serially connected between voltage regulator circuit and field effect micro-processor interface circuit
Relatively amplifying circuit composition；The GND pin ground connection of described control chip U；The Same Name of Ends of described transformator T secondary inductance coil with
Non-same polarity is collectively forming the outfan of this control system.
Further, the described amplifying circuit that compares is by amplifier P2, audion VT6, audion VT7, positive pole and audion
The negative pole phase of polar capacitor C15, the P pole that the base stage of VT6 is connected, negative pole is connected with the positive pole of amplifier P2 and amplifier P2
Connect, diode D11 that N pole outfan with amplifier P2 after resistance R22 is connected, the negative pole phase of negative pole and amplifier P2
The polar capacitor C16 that after connection, ground connection, positive pole are connected with the N pole of diode D11 after resistance R23, one end and polar capacitor
Resistance R24, the P pole that the positive pole of C15 is connected, the other end is connected with the colelctor electrode of audion VT6 after resistance R29 with three poles
The diode D12 that the colelctor electrode of pipe VT6 is connected, N pole is connected with the colelctor electrode of audion VT7, positive pole is with audion VT6's
Polar capacitor C17, the P pole that emitter stage is connected, negative pole base stage with audion VT7 after resistance R28 is connected is through resistance R25
The diode D13 that emitter stage with audion VT6 is connected afterwards, N pole is connected with the emitter stage of audion VT7, positive pole and two
The polar capacitor C18, Yi Jiyi that the N pole of pole pipe D13 is connected, negative pole is connected with the N pole of diode D11 after resistance R26
The adjustable resistance R17 composition that end is connected with the negative pole of polar capacitor C17, the other end is connected with the N pole of diode D13；Institute
State the minus earth of polar capacitor C18；The emitter stage of described audion VT7 is connected with field effect micro-processor interface circuit；Described pole
The negative pole of property electric capacity C15 is connected with voltage regulator circuit.
Described low-pass filter circuit by amplifier P1, audion VT1, positive pole after resistance R4 with the positive pole phase of amplifier P1
Connect, the polar capacitor C2 that is connected with concentration sensor QW of negative pole, positive pole after resistance R5 with the positive pole phase of polar capacitor C2
Connect, polar capacitor C3, the P pole of minus earth negative pole with amplifier P1 after resistance R6 is connected, N pole after resistance R8 with
The diode D2 that the outfan of amplifier P1 is connected, negative pole be connected with the negative pole of amplifier P1 after ground connection, positive pole through adjustable
The polar capacitor C4 being connected with the N pole of diode D2 after resistance R7, one end is connected with the N pole of diode D2, the other end with
The inductance L1 that the emitter stage of audion VT1 is connected, negative pole is connected with the base stage of audion VT1, positive pole and amplifier P1
The polar capacitor C5 that outfan is connected, positive pole is connected with the outfan of amplifier P1, the colelctor electrode of negative pole and audion VT1
Polar capacitor C6, the P pole being connected outfan with amplifier P1 after resistance R2 is connected, the current collection of N pole and audion VT1
The diode D3 that pole is connected, positive pole outfan with amplifier P1 after resistance R1 is connected, the polar capacitor of minus earth
C1, and two poles that N pole is connected with the positive pole of amplifier P1, P pole outfan with amplifier P1 after resistance R3 is connected
Pipe D1 forms；The colelctor electrode of described audion VT1 is connected with the IN pin of control chip U.
Described voltage regulator circuit is by audion VT2, and audion VT3, P pole is connected with the CF pin of control chip U, N
The diode D4 that pole emitter stage with audion VT2 after resistance R9 is connected, positive pole is connected with the CM pin of control chip U
Connect, polar capacitor C8 that negative pole is connected with the base stage of audion VT2, positive pole is connected with the colelctor electrode of audion VT2, negative pole
Polar capacitor C7, the P pole of ground connection is connected with the base stage of audion VT2, N pole after resistance R10 with the negative pole of polar capacitor C7
The diode D5 being connected, positive pole is connected with the base stage of audion VT3, negative pole after resistance R11 with the base stage of audion VT2
The polar capacitor C9 being connected, one end is connected with the N pole of diode D5, the other end is connected with the colelctor electrode of audion VT3
Adjustable resistance R13, and with adjustable resistance R13 phase and connect resistance R12 composition；The emitter stage of described audion VT3 and control
The PWM pin of coremaking sheet U is connected, its colelctor electrode also negative pole with polar capacitor C15 is connected.
Described field effect micro-processor interface circuit is by field effect transistor MOS, audion VT4, audion VT5, positive pole and control chip U
The polar capacitor C12 that OUT pin is connected, negative pole is connected with the grid of field effect transistor MOS, positive pole and field effect transistor MOS
The current collection of polar capacitor C10, the P pole that drain electrode is connected, negative pole is connected with the emitter stage of audion VT7 and audion VT4
The diode D8 that pole is connected, N pole is connected with the negative pole of polar capacitor C10, one end is connected with the drain electrode of field effect transistor MOS
Connect, adjustable resistance R19 that the other end is connected with the base stage of audion VT4, positive pole is connected with the colelctor electrode of audion VT5,
Polar capacitor C11, the P pole that negative pole is connected with the N pole of diode D8 after resistance R21 after inductance L2 with the N of diode D8
The diode D10 that pole is connected, N pole colelctor electrode with audion VT5 after resistance R18 is connected, one end is with audion VT4's
The emitter stage of the resistance R17 that emitter stage is connected, the other end is connected with the colelctor electrode of audion VT5, positive pole and audion VT5
Be connected, polar capacitor C13 that the non-same polarity of negative pole limit former with transformator T inductance coil is connected, and N pole and audion
The diode D7 composition that the base stage of VT5 is connected, P pole is connected with the COM pin of control chip U after resistance R16；Described field
The drain electrode of effect pipe MOS is also connected with the PWM pin of control chip U, its source electrode is then connected with the P pole of diode D7；Institute
State the N pole ground connection of diode D8.
In order to reach more preferable using effect, the described control chip U integrated chip of the most excellent AD736 of have employed realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention can by concentration sensor QW export the signal of telecommunication in because of interference signal produced by harmonic wave eliminate
Or suppression, the signal of telecommunication making concentration sensor QW export is smoother and more accurate；Effectively ensure that the present invention is to signal processing
Accuracy；And the present invention to being adjusted the high transient state of voltage and current, can also prevent the frequency of electric current from drift occur
Move, make voltage and current held stationary, ensure that the present invention can export burning voltage, effectively ensure that aluminium electrolysis process
Middle volumetric feeder to the accuracy of charging of the cell, makes aluminium electroloysis reach excellent production target.
(2) present invention can effectively put forward high-tension resistance to pressure and dynamic range, and can be by inclined for the middle zero point of electric current
Shifting controls within 0.2nA, ensures that the stability of output voltage of the present invention.
(3) the control chip U of the present invention the most preferentially have employed the integrated chip of AD736 and realizes, by this chip with outside
Circuit combines, and can effectively guarantee the present invention accuracy to signal processing, enables the invention to effectively to automatically control whole
Charging process；And also improve the stability of output voltage of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the comparison amplifying circuit of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to
This.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U, transformator T, concentration sensor QW, N pole and the former limit of transformator T
Diode D9, the P pole that the Same Name of Ends of inductance coil is connected, P pole is connected with the CC pin of control chip U after resistance R15
Voltage stabilizing two pole that VS pin with control chip U is connected after resistance R14, N pole is connected with the COM pin of control chip U
Pipe D6, positive pole is connected with the non-same polarity of transformator T secondary inductance coil, negative pole is same with transformator T secondary inductance coil
Name end be connected after the polar capacitor C14 of ground connection, be serially connected in the low pass between the IN pin of concentration sensor QW and control chip U
Filter circuit, the voltage regulator circuit being connected with the CF pin of control chip U and CM pin and PWM pin respectively, respectively
The field effect micro-processor interface circuit being connected with control chip U and transformator T-phase, and it is micro-with field effect to be serially connected in voltage regulator circuit
Process the comparison amplifying circuit composition between circuit.
The GND pin ground connection of described control chip U；The Same Name of Ends of described transformator T secondary inductance coil and non-same polarity
Being collectively forming the outfan of this control system, during enforcement, this outfan is then connected with volumetric feeder.In order to reach more preferable
Using effect, the described control chip U integrated chip of the most excellent AD736 of have employed realizes, the VS pin of this chip then with outside
Power supply is connected.Meanwhile, described concentration sensor QW the most preferentially have employed ZJ2001A strength of fluid sensor and realizes, should
Concentration sensor QW is used for gathering alumina concentration value in electrolytic process.
Further, described low-pass filter circuit is by amplifier P1, audion VT1, resistance R1, resistance R2, resistance R3, electricity
Resistance R4, resistance R5, resistance R6, adjustable resistance R7, resistance R8, polar capacitor C1, polar capacitor C2, polar capacitor C3, polarity electricity
Hold C4, polar capacitor C5, polar capacitor C6, diode D1, diode D2, diode D3, and inductance L1 composition.
During connection, the positive pole of polar capacitor C2 positive pole with amplifier P1 after resistance R4 is connected, and negative pole passes with concentration
Sensor QW is connected.The positive pole of polar capacitor C3 positive pole with polar capacitor C2 after resistance R5 is connected, minus earth.Two poles
The P pole of pipe D2 negative pole with amplifier P1 after resistance R6 is connected, and N pole outfan with amplifier P1 after resistance R8 is connected
Connect.
Wherein, the negative pole of polar capacitor C4 be connected with the negative pole of amplifier P1 after ground connection, positive pole is after adjustable resistance R7
It is connected with the N pole of diode D2.One end of inductance L1 is connected with the N pole of diode D2, and the other end is sent out with audion VT1's
Emitter-base bandgap grading is connected.The negative pole of polar capacitor C5 is connected with the base stage of audion VT1, and positive pole is connected with the outfan of amplifier P1
Connect.The positive pole of polar capacitor C6 is connected with the outfan of amplifier P1, and negative pole is connected with the colelctor electrode of audion VT1.
Meanwhile, the P pole of diode D3 outfan with amplifier P1 after resistance R2 is connected, and N pole is with audion VT1's
Colelctor electrode is connected.The positive pole of polar capacitor C1 outfan with amplifier P1 after resistance R1 is connected, minus earth.Two poles
The N pole of pipe D1 is connected with the positive pole of amplifier P1, and P pole outfan with amplifier P1 after resistance R3 is connected.Described three
The colelctor electrode of pole pipe VT1 is connected with the IN pin of control chip U.
Further, described voltage regulator circuit is by audion VT2, audion VT3, resistance R9, resistance R10, resistance
R11, resistance R12, adjustable resistance R13, polar capacitor C7, polar capacitor C8, polar capacitor C9, diode D4, and diode
D5 forms.
During connection, the P pole of diode D4 is connected with the CF pin of control chip U, N pole after resistance R9 with audion
The emitter stage of VT2 is connected.The positive pole of polar capacitor C8 is connected with the CM pin of control chip U, and negative pole is with audion VT2's
Base stage is connected.The positive pole of polar capacitor C7 is connected with the colelctor electrode of audion VT2, minus earth.
Meanwhile, the P pole of diode D5 is connected with the base stage of audion VT2, N pole after resistance R10 with polar capacitor C7
Negative pole be connected.The pole of polar capacitor C9 is connected with the base stage of audion VT3, negative pole after resistance R11 with audion VT2
Base stage be connected.One end of adjustable resistance R13 is connected with the N pole of diode D5, the other end and the colelctor electrode of audion VT3
Being connected, resistance R12 and adjustable resistance R13 phase also connect.The emitter stage of described audion VT3 and the PWM pin of control chip U
Being connected, its colelctor electrode also negative pole with polar capacitor C15 is connected.
Yet further, described field effect micro-processor interface circuit is by field effect transistor MOS, audion VT4, audion VT5, resistance
R16, resistance R17, resistance R18, resistance R19, adjustable resistance R20, resistance R21, polar capacitor C10, polar capacitor C11, polarity
Electric capacity C12, polar capacitor C13, diode D7, diode D8, diode D10, and inductance L2 form.
During connection, the positive pole of polar capacitor C12 is connected with the OUT pin of control chip U, negative pole and field effect transistor MOS
Grid be connected.The positive pole of polar capacitor C10 is connected with the drain electrode of field effect transistor MOS, negative pole and the transmitting of audion VT7
Pole is connected.The P pole of diode D8 is connected with the colelctor electrode of audion VT4, and N pole is connected with the negative pole of polar capacitor C10.
Wherein, one end of adjustable resistance R19 is connected with the drain electrode of field effect transistor MOS, the other end and the base of audion VT4
Pole is connected.The positive pole of polar capacitor C11 is connected with the colelctor electrode of audion VT5, negative pole after resistance R21 with diode D8
N pole be connected.N pole with diode D8 after inductance L2, the P pole of diode D10 is connected, N pole after resistance R18 with three
The colelctor electrode of pole pipe VT5 is connected.One end of resistance R17 is connected with the emitter stage of audion VT4, the other end and audion
The colelctor electrode of VT5 is connected.
Meanwhile, the positive pole of polar capacitor C13 is connected with the emitter stage of audion VT5, negative pole and transformator T former limit inductance
The non-same polarity of coil is connected.The N pole of diode D7 is connected with the base stage of audion VT5, P pole after resistance R16 with control
The COM pin of coremaking sheet U is connected.The drain electrode of described field effect transistor MOS is also connected with the PWM pin of control chip U, its source
Pole is then connected with the P pole of diode D7；The N pole ground connection of described diode D8.
As in figure 2 it is shown, the described amplifying circuit that compares is by amplifier P2, audion VT6, audion VT7, resistance R22, resistance
R23, resistance R24, resistance R25, resistance R26, adjustable resistance R27, resistance R28, polar capacitor C15, polar capacitor C16, polarity
Electric capacity C17, polar capacitor C18, diode D11, diode D12, and diode D13 form.
During connection, the positive pole of polar capacitor C15 is connected with the base stage of audion VT6, negative pole and the positive pole of amplifier P2
It is connected.The P pole of diode D11 is connected with the negative pole of amplifier P2, N pole after resistance R22 with the outfan of amplifier P2
It is connected.The negative pole of polar capacitor C16 be connected with the negative pole of amplifier P2 after ground connection, positive pole after resistance R23 with diode
The N pole of D11 is connected.One end of resistance R24 is connected with the positive pole of polar capacitor C15, the other end and the current collection of audion VT6
Pole is connected.
Wherein, the P pole of diode D12 colelctor electrode with audion VT6 after resistance R29 is connected, N pole and audion
The colelctor electrode of VT7 is connected.The positive pole of polar capacitor C17 is connected with the emitter stage of audion VT6, and negative pole is after resistance R28
It is connected with the base stage of audion VT7.The P pole of diode D13 emitter stage with audion VT6 after resistance R25 is connected, N
Pole is connected with the emitter stage of audion VT7.
Meanwhile, the positive pole of polar capacitor C18 is connected with the N pole of diode D13, negative pole after resistance R26 with diode
The N pole of D11 is connected.One end of adjustable resistance R17 is connected with the negative pole of polar capacitor C17, and the other end is with diode D13's
N pole is connected.The minus earth of described polar capacitor C18；The emitter stage of described audion VT7 and field effect micro-processor interface circuit phase
Connect；The negative pole of described polar capacitor C15 is connected with voltage regulator circuit.
During work, control chip U must electrically activate and receive the alumina concentration letter detected by strength of fluid sensor QW
Number, send according to alumina concentration signal simultaneously and trigger signal accordingly.When alumina concentration is identical with benchmark concentration, control
Chip U sends low level, and field effect transistor MOS is not turned on, and volumetric feeder dead electricity quits work.When strength of fluid sensor QW institute
When the alumina concentration signal of collection is low, control chip U sends high level, and field effect transistor MOS turns on, and volumetric feeder must be established by cable
Beginning work, i.e. volumetric feeder are interpolation aluminium oxide in electrolysis bath, add alumina concentration and keep with benchmark concentration in making solution groove
Unanimously.
The present invention can by the signal of telecommunication that concentration sensor QW exports carries out eliminating because of harmonic wave produced by interference signal or
Suppression, the signal of telecommunication making concentration sensor QW export is smoother and more accurate；Effectively ensure that the present invention is to signal processing
Accuracy；And the present invention to being adjusted the high transient state of voltage and current, can also prevent the frequency of electric current from drift occur,
Make voltage and current held stationary, ensure that the present invention can export burning voltage, effectively ensure that in aluminium electrolysis process
Volumetric feeder to the accuracy of charging of the cell, makes aluminium electroloysis reach excellent production target.
Meanwhile, the present invention can effectively put forward high-tension resistance to pressure and dynamic range, and can be by the middle zero point of electric current
Skew controls within 0.2nA, ensures that the stability of output voltage of the present invention.The control chip U of the present invention is the most preferential
Have employed the integrated chip of AD736 to realize, combined with external circuit by this chip, can effectively guarantee that the present invention is to signal
The accuracy processed, enables the invention to effectively automatically control whole charging process；And also improve output voltage of the present invention
Stability.
As it has been described above, just can well realize the present invention.
Claims (6)
1. one kind based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit, it is characterised in that mainly by controlling core
Sheet U, transformator T, the Same Name of Ends of limit former with transformator T, concentration sensor QW, N pole inductance coil is connected, P pole is through resistance R15
Diode D9, the P pole being connected with the CC pin of control chip U afterwards VS pin with control chip U after resistance R14 is connected
Connect, Zener diode D6 that N pole is connected with the COM pin of control chip U, positive pole is non-with transformator T secondary inductance coil
The polar capacitor C14 of ground connection after Same Name of Ends is connected, negative pole is connected with the Same Name of Ends of transformator T secondary inductance coil, concatenation
Low-pass filter circuit between the IN pin of concentration sensor QW and control chip U, respectively with the CF pin of control chip U and
The voltage regulator circuit that CM pin and PWM pin are connected, the field effect being connected with control chip U and transformator T-phase respectively
Micro-processor interface circuit, and the comparison amplifying circuit composition being serially connected between voltage regulator circuit and field effect micro-processor interface circuit；Institute
State the GND pin ground connection of control chip U；The Same Name of Ends of described transformator T secondary inductance coil and non-same polarity are collectively forming this
The outfan of control system.
The most according to claim 1 a kind of based on comparing the auto feed control system used for aluminium electrolysis of amplifying circuit, it is special
Levy and be, the described amplifying circuit that compares by amplifier P2, audion VT6, audion VT7, the base stage phase of positive pole and audion VT6
Polar capacitor C15, the P pole that connection, negative pole are connected with the positive pole of amplifier P2 is connected with the negative pole of amplifier P2, N pole warp
The diode D11 that after resistance R22, outfan with amplifier P2 is connected, negative pole is connected with the negative pole of amplifier P2 and is followed by
The positive pole of the polar capacitor C16 that ground, positive pole are connected with the N pole of diode D11 after resistance R23, one end and polar capacitor C15
Be connected, resistance R24, P pole that the other end is connected with the colelctor electrode of audion VT6 after resistance R29 with the collection of audion VT6
The diode D12 that electrode is connected, N pole is connected with the colelctor electrode of audion VT7, the emitter stage phase of positive pole and audion VT6
Connect, polar capacitor C17, P pole that negative pole base stage with audion VT7 after resistance R28 is connected after resistance R25 with three poles
The diode D13 that the emitter stage of pipe VT6 is connected, N pole is connected with the emitter stage of audion VT7, positive pole is with diode D13's
The polar capacitor C18 that N pole is connected, negative pole is connected with the N pole of diode D11 after resistance R26, and one end is electric with polarity
Hold the adjustable resistance R17 that negative pole is connected, the other end the is connected composition of C17 with the N pole of diode D13；Described polar capacitor
The minus earth of C18；The emitter stage of described audion VT7 is connected with field effect micro-processor interface circuit；Described polar capacitor C15's
Negative pole is connected with voltage regulator circuit.
The most according to claim 2 a kind of based on comparing the auto feed control system used for aluminium electrolysis of amplifying circuit, it is special
Levy and be, described low-pass filter circuit by amplifier P1, audion VT1, positive pole after resistance R4 with the positive pole phase of amplifier P1
Connect, the polar capacitor C2 that is connected with concentration sensor QW of negative pole, positive pole after resistance R5 with the positive pole phase of polar capacitor C2
Connect, polar capacitor C3, the P pole of minus earth negative pole with amplifier P1 after resistance R6 is connected, N pole after resistance R8 with
The diode D2 that the outfan of amplifier P1 is connected, negative pole be connected with the negative pole of amplifier P1 after ground connection, positive pole through adjustable
The polar capacitor C4 being connected with the N pole of diode D2 after resistance R7, one end is connected with the N pole of diode D2, the other end with
The inductance L1 that the emitter stage of audion VT1 is connected, negative pole is connected with the base stage of audion VT1, positive pole and amplifier P1
The polar capacitor C5 that outfan is connected, positive pole is connected with the outfan of amplifier P1, the colelctor electrode of negative pole and audion VT1
Polar capacitor C6, the P pole being connected outfan with amplifier P1 after resistance R2 is connected, the current collection of N pole and audion VT1
The diode D3 that pole is connected, positive pole outfan with amplifier P1 after resistance R1 is connected, the polar capacitor of minus earth
C1, and two poles that N pole is connected with the positive pole of amplifier P1, P pole outfan with amplifier P1 after resistance R3 is connected
Pipe D1 forms；The colelctor electrode of described audion VT1 is connected with the IN pin of control chip U.
The most according to claim 3 a kind of based on comparing the auto feed control system used for aluminium electrolysis of amplifying circuit, it is special
Levying and be, described voltage regulator circuit is by audion VT2, and audion VT3, P pole is connected with the CF pin of control chip U, N pole
The diode D4 that emitter stage with audion VT2 is connected after resistance R9, positive pole is connected with the CM pin of control chip U,
The polar capacitor C8 that negative pole is connected with the base stage of audion VT2, positive pole is connected with the colelctor electrode of audion VT2, negative pole connects
Polar capacitor C7, the P pole on ground is connected with the base stage of audion VT2, N pole after resistance R10 with the negative pole phase of polar capacitor C7
The diode D5 connected, positive pole is connected with the base stage of audion VT3, negative pole after resistance R11 with the base stage phase of audion VT2
The polar capacitor C9 connected, one end is connected with the N pole of diode D5, the other end is connected with the colelctor electrode of audion VT3
Adjustable resistance R13, and with adjustable resistance R13 phase and connect resistance R12 composition；The emitter stage of described audion VT3 and control
The PWM pin of chip U is connected, its colelctor electrode also negative pole with polar capacitor C15 is connected.
The most according to claim 4 a kind of based on comparing the auto feed control system used for aluminium electrolysis of amplifying circuit, it is special
Levying and be, described field effect micro-processor interface circuit is by field effect transistor MOS, audion VT4, audion VT5, positive pole and control chip U
The polar capacitor C12 that OUT pin is connected, negative pole is connected with the grid of field effect transistor MOS, positive pole and field effect transistor MOS
The current collection of polar capacitor C10, the P pole that drain electrode is connected, negative pole is connected with the emitter stage of audion VT7 and audion VT4
The diode D8 that pole is connected, N pole is connected with the negative pole of polar capacitor C10, one end is connected with the drain electrode of field effect transistor MOS
Connect, adjustable resistance R19 that the other end is connected with the base stage of audion VT4, positive pole is connected with the colelctor electrode of audion VT5,
Polar capacitor C11, the P pole that negative pole is connected with the N pole of diode D8 after resistance R21 after inductance L2 with the N of diode D8
The diode D10 that pole is connected, N pole colelctor electrode with audion VT5 after resistance R18 is connected, one end is with audion VT4's
The emitter stage of the resistance R17 that emitter stage is connected, the other end is connected with the colelctor electrode of audion VT5, positive pole and audion VT5
Be connected, polar capacitor C13 that the non-same polarity of negative pole limit former with transformator T inductance coil is connected, and N pole and audion
The diode D7 composition that the base stage of VT5 is connected, P pole is connected with the COM pin of control chip U after resistance R16；Described field
The drain electrode of effect pipe MOS is also connected with the PWM pin of control chip U, its source electrode is then connected with the P pole of diode D7；Institute
State the N pole ground connection of diode D8.
The most according to claim 5 a kind of based on comparing the auto feed control system used for aluminium electrolysis of amplifying circuit, it is special
Levying and be, described control chip U is the integrated chip of AD736.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620701.4A CN106222701A (en) | 2016-07-29 | 2016-07-29 | A kind of based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit |
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| CN201610620701.4A CN106222701A (en) | 2016-07-29 | 2016-07-29 | A kind of based on the auto feed control system used for aluminium electrolysis comparing amplifying circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684280A (en) * | 2022-11-02 | 2023-02-03 | 山东恒美电子科技有限公司 | Automatic measurement system of meat water content |
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| EP0042503B1 (en) * | 1980-06-20 | 1983-08-24 | Siemens Aktiengesellschaft | Apparatus for the electroplating of aluminium |
| CN105274573A (en) * | 2015-10-30 | 2016-01-27 | 四川华索自动化信息工程有限公司 | Automatic alumina feeding system for aluminium electrolysis |
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2016
- 2016-07-29 CN CN201610620701.4A patent/CN106222701A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0042503B1 (en) * | 1980-06-20 | 1983-08-24 | Siemens Aktiengesellschaft | Apparatus for the electroplating of aluminium |
| CN105274573A (en) * | 2015-10-30 | 2016-01-27 | 四川华索自动化信息工程有限公司 | Automatic alumina feeding system for aluminium electrolysis |
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| 吴运昌: "《模拟集成电路原理与应用》", 30 June 1995, 广州：华南理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684280A (en) * | 2022-11-02 | 2023-02-03 | 山东恒美电子科技有限公司 | Automatic measurement system of meat water content |
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