CN107262285A - A kind of current control device for static dust-removing power - Google Patents
A kind of current control device for static dust-removing power Download PDFInfo
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- CN107262285A CN107262285A CN201710680516.9A CN201710680516A CN107262285A CN 107262285 A CN107262285 A CN 107262285A CN 201710680516 A CN201710680516 A CN 201710680516A CN 107262285 A CN107262285 A CN 107262285A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
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Abstract
The invention discloses a kind of current control device for static dust-removing power, including：Hysteresis band control module, current hysteresis-band control module and trigger pulse distribute module.Wherein, the hysteresis band control module is used to receive the set-point of deduster voltage and the actual value of deduster voltage, exports the given current value of transformer and the upper and lower bound of hysteresis band；Given current value, the upper limit of the actual current value of transformer and hysteresis band, the lower limit of current hysteresis-band control module receiving transformer, export total trigger pulse；Trigger pulse distribute module is extracted to total trigger pulse again, obtains the pulse signal related to electrostatic dust collection equipment.The present invention is that the actual electric signal based on cleaner produces the pulse signal related with electrostatic dust collection equipment to operating procedure signal cleaner is controlled, and running is simple, fast response time, and then improves efficiency of dust collection, reduces power consumption.
Description
Technical field
Filled the present invention relates to technical field of electrostatic dust collection, more particularly to a kind of current control for static dust-removing power
Put.
Background technology
The nearly 900,000,000 tons of steels production of China is based on pneumatic steelmaking, and it accounts for nearly the 80% of national total amount.Wherein, 100 tons-
The production capacity of 300 tonnes of converters accounts for the 50% of national iron and steel output.Therefore, the dust removal problem of mammoth conveter steel-making is to reduce steel
The most important part of industry atmosphere pollution.
At present, the dedusting of mammoth conveter steel-making mainly uses electrostatic precipitator.The operation principle of electrostatic precipitator is to utilize
High voltage electric field ionizes flue gas, and the dust in air-flow is charged to be separated under electric field action with air-flow.Negative pole is by different section
The plain conductor of shape is made, and is sparking electrode.Positive pole is made up of the metallic plate of different geometries, is collecting electrode.Electrostatic
The performance of deduster is influenceed by three factors such as dust characteristic, equipment construction and flue gas flow rates.The ratio resistance of dust is to evaluate
The index of electric conductivity, it has direct influence on efficiency of dust collection.Ratio resistance is too low, and grit is difficult to be maintained on collecting electrode, causes
It is set to return to air-flow.Ratio resistance is too high, and the grit electric charge for reaching collecting electrode is difficult to release, and voltage gradient is formed between knoisphere
Partial breakdown and electric discharge phenomena can be produced.These situations can all cause efficiency of dust collection to decline.
Be currently used for mammoth conveter steel-making electrostatic precipitator in the course of the work, temperature fluctuation, ratio resistance change greatly, soon
The dust specific resistance of speed change can cause the magnitude of voltage of flashover constantly to change, and existing cleaner response speed is slower, with
As for efficiency of dust collection is low, electrical power consumed is big.
The content of the invention
It is an object of the present invention to provide a kind of current control device for static dust-removing power, to solve the above problems.
The present invention solves technical problem and adopted the following technical scheme that：
A kind of current control device for static dust-removing power, including：
Hysteresis band control module, the hysteresis band control module is used for set-point and the dedusting for receiving deduster voltage
The actual value of device voltage, and set-point and the given electricity of the actual value acquisition transformer of deduster voltage according to deduster voltage
The upper and lower bound of flow valuve and hysteresis band；
Current hysteresis-band control module, the current hysteresis-band control module is connected with the hysteresis band control module, is used for
Given current value, the upper limit of the actual current value of transformer and hysteresis band, the lower limit of receiving transformer, and according to transformer
Given current value, the upper limit of the actual current value of transformer and hysteresis band, lower limit obtain total trigger pulse；
Trigger pulse distribute module, the trigger pulse distribute module is connected with the current hysteresis-band control module, is used for
Receive total trigger pulse, and the extraction pulse signal related to electrostatic dust collection equipment in total trigger pulse.
It is preferred that, the hysteresis band control module, including：
First difference operator, the positive input terminal of first difference operator inputs the set-point of deduster voltage, and described the
The negative input end of one difference operator inputs the actual value of deduster voltage, the set-point and deduster voltage of the deduster voltage
Actual value difference operation is done by the first difference operator；
Pi regulator, the input of the pi regulator is connected with the output end of first difference operator, for institute
The output result for stating the first difference operator is adjusted, and will adjust given current value of the result as transformer；
Ring width arithmetic unit, the ring width arithmetic unit is connected with the output end of the pi regulator, for receiving transformer
Given current value, and according to default the ring width mathematical modeling and transformation related to electrostatic dust collection equipment in the ring width arithmetic unit
The given current value of device calculates the upper and lower bound for obtaining hysteresis band.
It is preferred that, the current hysteresis-band control module, including：
Second difference operator, the positive input terminal of second difference operator is connected with the output end of the pi regulator, uses
In the given current value of input transformer, the actual current value of the negative input end input transformer of second difference operator, institute
State the given current value of transformer and the actual current value of transformer and difference operation acquisition hysteresis band is done by the second difference operator
Actual value.
First comparator, the hysteresis band upper limit of the positive input terminal of the first comparator and the ring width arithmetic unit is exported
End is connected, the upper limit for receiving the hysteresis band, the negative input end of the first comparator and second difference operator
Output end be connected, the actual value for receiving the hysteresis band；
Second comparator, the output end phase of the positive input terminal of second comparator and second difference operator
Even, the actual value for receiving the hysteresis band, the negative input end of second comparator is stagnant with the ring width arithmetic unit
Ring width lower limit output end is connected, the lower limit for receiving the hysteresis band；
Rest-set flip-flop, the R ends of the rest-set flip-flop are connected with the output end of the first comparator, the rest-set flip-flop
S ends are connected with the output end of second comparator, and the rest-set flip-flop Q ends export total trigger pulse.
It is preferred that, the trigger pulse distribute module, including：
A trigger pulse distributors, the A trigger pulses distributor is connected with the current hysteresis-band control module, for connecing
Receive total trigger pulse, and extraction A+ trigger pulses and A- trigger pulses in total trigger pulse；
B trigger pulse distributors, the B trigger pulses distributor is connected with the current hysteresis-band control module, for connecing
Receive total trigger pulse, and extraction B+ trigger pulses and B- trigger pulses in total trigger pulse.
It is preferred that, the A trigger pulses distributor, including：
First and arithmetic unit, described first receives the first default square wave with the first input end of arithmetic unit, described first with
Second input of arithmetic unit is connected with the current hysteresis-band control module, receives total trigger pulse；
Second and arithmetic unit, described second receives the second default square wave with the first input end of arithmetic unit, described second with
Second input of arithmetic unit is connected with the current hysteresis-band control module, receives total trigger pulse；
First and arithmetic unit, described first and arithmetic unit first input end and described first with the output end phase of arithmetic unit
Even, described first and the second input of arithmetic unit be connected with described second with the output end of arithmetic unit；
Second and arithmetic unit, described second and first input end and described first and the output end phase of arithmetic unit of arithmetic unit
Even, described second and the second input of arithmetic unit receive the 3rd default square wave；
First switch controller, the input of the first switch controller and described second and the output end phase of arithmetic unit
Even, the first switch controller exports A+ trigger pulses；
First NOT gate, the first NOT gate input is connected with the output end of described second and arithmetic unit；
Second switch controller, the input of the second switch controller is connected with the output end of first NOT gate,
The second switch controller exports A- trigger pulses.
It is preferred that, the B trigger pulses distributor, including：
3rd and arithmetic unit, the described 3rd receives the 4th default square wave with the first input end of arithmetic unit, the described 3rd with
Second input of arithmetic unit is connected with the current hysteresis-band control module, receives total trigger pulse；
4th and arithmetic unit, the described 4th receives the 5th default square wave with the first input end of arithmetic unit, the described 4th with
Second input of arithmetic unit is connected with the current hysteresis-band control module, receives total trigger pulse；
3rd and arithmetic unit, the described 3rd and arithmetic unit first input end and the described 3rd with the output end phase of arithmetic unit
Even, the described 3rd and the second input of arithmetic unit be connected with the described 4th with the output end of arithmetic unit；
4th and arithmetic unit, the described 4th and first input end and the described 3rd and the output end phase of arithmetic unit of arithmetic unit
Even, the described 4th and the second input of arithmetic unit receive the 6th default square wave；
3rd switch controller, the input of the 3rd switch controller and the described 4th and the output end phase of arithmetic unit
Even, the 3rd switch controller exports B+ trigger pulses；
Second NOT gate, the second NOT gate input is connected with the output end of the described 4th and arithmetic unit；
4th switch controller, the input of the 4th switch controller is connected with the output end of second NOT gate,
4th switch controller exports B- trigger pulses.
It is preferred that, the trigger pulse distribute module is connected with the drive circuit of electrostatic dust collection equipment, and to the electrostatic
Drive circuit output A+ trigger pulses, A- trigger pulses, B+ trigger pulses and the B- trigger pulses of cleaner.
It is preferred that, the A+ trigger pulses, A- trigger pulses, the frequency of B+ trigger pulses and B- trigger pulses are 1kHz-
30kHz。
It can be seen that, the current control device disclosed in this invention for static dust-removing power includes hysteresis band and controls mould
Block, current hysteresis-band control module and trigger pulse distribute module.Wherein, the hysteresis band control module is used to receive deduster
The set-point of voltage and the actual value of deduster voltage, export the given current value of transformer and the upper limit of hysteresis band with
Limit；The given current value of current hysteresis-band control module receiving transformer, the upper limit of the actual current value of transformer and hysteresis band,
Lower limit, exports total trigger pulse；Trigger pulse distribute module is extracted to total trigger pulse again, is obtained and electrostatic dust collection equipment
Related pulse signal.The present invention is that actual electric signal based on cleaner is produced and electrostatic precipitation with operating procedure signal
Device-dependent pulse signal is controlled to cleaner, and running is simple, fast response time, and then improves dedusting effect
Rate, reduce power consumption.
Brief description of the drawings
Fig. 1 is a kind of current control device schematic diagram for static dust-removing power disclosed in this invention；
Fig. 2 is another current control device schematic diagram for static dust-removing power disclosed in this invention；
Fig. 3 is transformer primary side voltage waveform disclosed in this invention and current waveform figure；
Fig. 4 is a kind of A trigger pulses distributor schematic diagram disclosed in this invention；
Fig. 5 is a kind of B trigger pulses distributor schematic diagram disclosed in this invention；
Fig. 6 is the phase path figure of the current control device disclosed in this invention for static dust-removing power.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Technical scheme is further elaborated with reference to embodiment and accompanying drawing.
Present embodiment discloses a kind of current control device for static dust-removing power, as shown in figure 1, including：
Hysteresis band control module, the hysteresis band control module is used for set-point and the dedusting for receiving deduster voltage
The actual value of device voltage, and set-point and the given electricity of the actual value acquisition transformer of deduster voltage according to deduster voltage
The upper and lower bound of flow valuve and hysteresis band；
Current hysteresis-band control module, the current hysteresis-band control module is connected with the hysteresis band control module, is used for
Given current value, the upper limit of the actual current value of transformer and hysteresis band, the lower limit of receiving transformer, and according to transformer
Given current value, the upper limit of the actual current value of transformer and hysteresis band, lower limit obtain total trigger pulse；
Trigger pulse distribute module, the trigger pulse distribute module is connected with the current hysteresis-band control module, is used for
Receive total trigger pulse, and the extraction pulse signal related to electrostatic dust collection equipment in total trigger pulse.
Wherein, the set-point of deduster voltage is obtained based on cleaner operating procedure, by Expert System Optimization
Operating procedure signal, the actual value of deduster voltage and the actual current value of transformer are the telecommunications that cleaner is surveyed in itself
Number, the actual electric signal of the invention for being namely based on cleaner produces related with electrostatic dust collection equipment to operating procedure signal
Pulse signal is controlled to cleaner, and its running is simple, fast response time, and then improves efficiency of dust collection, reduction
Power consumption.
As shown in Fig. 2 the hysteresis band control module, including：
First difference operator, the positive input terminal of first difference operator inputs the set-point of deduster voltage, and described the
The negative input end of one difference operator inputs the actual value of deduster voltage, the set-point and deduster voltage of the deduster voltage
Actual value difference operation is done by the first difference operator；
Pi regulator, the input of the pi regulator is connected with the output end of first difference operator, for institute
The output result for stating the first difference operator is adjusted, and will adjust given current value of the result as transformer；
Ring width arithmetic unit, the ring width arithmetic unit is connected with the output end of the pi regulator, for receiving transformer
Given current value, and according to default the ring width mathematical modeling and transformation related to electrostatic dust collection equipment in the ring width arithmetic unit
The given current value of device calculates the upper and lower bound for obtaining hysteresis band.
The current value that the upper and lower bound of hysteresis band gives with transformer is a kind of mathe-matical map relation, the mathe-matical map
Relation is the default ring width mathematical modeling related to electrostatic dust collection equipment in the ring width arithmetic unit, and the mathematical modeling may
It is conic section relation, it is also possible to linear function or proportionate relationship, this depends on the different working condition of cleaner and behaviour
Make technique, when loading condition changes or the switching frequency of switching tube changes, equally can also influence the ring width of stagnant ring.
When the upper and lower bound ring width upper and lower limit of hysteresis band is linear function relation with the current value given with transformer, transformation
Device primary side voltage (on), electric current (under) waveform fig. 3, it is shown that stagnant ring with traditional fixation hysteresis band
Control method is compared, and the upper and lower limits value of hysteresis band of the stagnant ring changes constantly, is suitable for the fast-changing field of operating mode
Close.
The current hysteresis-band control module, including：
Second difference operator, the positive input terminal of second difference operator is connected with the output end of the pi regulator, uses
In the given current value of input transformer, the actual current value of the negative input end input transformer of second difference operator, institute
State the given current value of transformer and the actual current value of transformer and difference operation acquisition hysteresis band is done by the second difference operator
Actual value；
First comparator, the hysteresis band upper limit of the positive input terminal of the first comparator and the ring width arithmetic unit is exported
End is connected, the upper limit for receiving the hysteresis band, the negative input end of the first comparator and second difference operator
Output end be connected, the actual value for receiving the hysteresis band；
Second comparator, the output end phase of the positive input terminal of second comparator and second difference operator
Even, the actual value for receiving the hysteresis band, the negative input end of second comparator is stagnant with the ring width arithmetic unit
Ring width lower limit output end is connected, the lower limit for receiving the hysteresis band；
Rest-set flip-flop, the R ends of the rest-set flip-flop are connected with the output end of the first comparator, the rest-set flip-flop
S ends are connected with the output end of second comparator, and the rest-set flip-flop Q ends export total trigger pulse.That is, if hysteresis band
Actual value exceed stagnant ring upper limit threshold then first comparator produce shutdown command, if the actual value of hysteresis band be less than stagnant ring
Then the second comparator produces opening order to lower limit threshold values.Two kinds of orders are exported to rest-set flip-flop, are in the Q ends output of rest-set flip-flop
It can obtain total trigger pulse Pulse.
Because the Q ends output of rest-set flip-flop obtains the trigger pulse that total trigger pulse Pulse is combined, but dedusting is set
Four switching tubes are had, so needing in four kinds of trigger pulses, the present embodiment by trigger pulse distribute module in always triggering arteries and veins
Four pulse signals related to electrostatic dust collection equipment are extracted in punching.
The trigger pulse distribute module, including：
A trigger pulse distributors, the A trigger pulses distributor is connected with the current hysteresis-band control module, for connecing
Receive total trigger pulse, and extraction A+ trigger pulses and A- trigger pulses in total trigger pulse；
B trigger pulse distributors, the B trigger pulses distributor is connected with the current hysteresis-band control module, for connecing
Receive total trigger pulse, and extraction B+ trigger pulses and B- trigger pulses in total trigger pulse.
That is, pulse signal related to electrostatic dust collection equipment includes：A+ trigger pulses, A- trigger pulses, B+ trigger pulses
With B- trigger pulses.
As shown in figure 4, the A trigger pulses distributor, including：
First and arithmetic unit, described first receives the first default square wave VSQ1 with the first input end of arithmetic unit, and described the
One is connected with the second input of arithmetic unit with the current hysteresis-band control module, receives total trigger pulse；
Second and arithmetic unit, described second receives the second default square wave VSQ2 with the first input end of arithmetic unit, and described the
Two are connected with the second input of arithmetic unit with the current hysteresis-band control module, receive total trigger pulse；
First and arithmetic unit, described first and arithmetic unit first input end and described first with the output end phase of arithmetic unit
Even, described first and the second input of arithmetic unit be connected with described second with the output end of arithmetic unit；
Second and arithmetic unit, described second and first input end and described first and the output end phase of arithmetic unit of arithmetic unit
Even, described second and the second input of arithmetic unit receive the 3rd default square wave VSQ3；
First switch controller, the input of the first switch controller and described second and the output end phase of arithmetic unit
Even, the first switch controller exports A+ trigger pulses；
First NOT gate, the first NOT gate input is connected with the output end of described second and arithmetic unit；
Second switch controller, the input of the second switch controller is connected with the output end of first NOT gate,
The second switch controller exports A- trigger pulses.
The trigger pulse distribute module is connected with the drive circuit of electrostatic dust collection equipment, and to the electrostatic dust collection equipment
Drive circuit output A+ trigger pulses, A- trigger pulses, B+ trigger pulses and B- trigger pulses.
As shown in figure 5, the B trigger pulses distributor, including：
3rd and arithmetic unit, the described 3rd receives the 4th default square wave VSQ4 with the first input end of arithmetic unit, and described the
Three are connected with the second input of arithmetic unit with the current hysteresis-band control module, receive total trigger pulse；
4th and arithmetic unit, the described 4th receives the 5th default square wave VSQ5 with the first input end of arithmetic unit, and described the
Four are connected with the second input of arithmetic unit with the current hysteresis-band control module, receive total trigger pulse；
3rd and arithmetic unit, the described 3rd and arithmetic unit first input end and the described 3rd with the output end phase of arithmetic unit
Even, the described 3rd and the second input of arithmetic unit be connected with the described 4th with the output end of arithmetic unit；
4th and arithmetic unit, the described 4th and first input end and the described 3rd and the output end phase of arithmetic unit of arithmetic unit
Even, the described 4th and the second input of arithmetic unit receive the 6th default square wave VSQ6；
3rd switch controller, the input of the 3rd switch controller and the described 4th and the output end phase of arithmetic unit
Even, the 3rd switch controller exports B+ trigger pulses；
Second NOT gate, the second NOT gate input is connected with the output end of the described 4th and arithmetic unit；
4th switch controller, the input of the 4th switch controller is connected with the output end of second NOT gate,
4th switch controller exports B- trigger pulses.
The trigger pulse distribute module is connected with the drive circuit of electrostatic dust collection equipment, and to the electrostatic dust collection equipment
Drive circuit output A+ trigger pulses, A- trigger pulses, B+ trigger pulses and B- trigger pulses.
It should be noted that the given current value of the transformer and the actual current value of transformer are to take electric current absolutely
To value, i.e., the negative half of electric current is translated into positive half and participate in computing again, therefore negative half is taken in trigger pulse distribute module
During part trigger pulse is calculated, the pulse obtained from this positive half negate after could as negative half trigger pulse meter
Calculate.
In addition, the default square wave in the present embodiment is the predetermined frequency according to required for pulse signal in cleaner,
In the present embodiment, the frequency of the A+ trigger pulses, A- trigger pulses, B+ trigger pulses and B- trigger pulses is all 1kHz-
30kHz.Under the frequency, the current control device disclosed in the present embodiment can reach the live voltage of quick tracking, electric current and
The purpose of accurate adjustment voltage, electric current.Moreover, using the bistable state (break-make and off-state) of hard switching pattern under equal switching frequency
Power attenuation with double transient states (turning on and off) is than using the larger of sofe switch pattern, therefore default working frequency of the invention
It is that 1kHz-30k Hz reduce the power attenuation of switching tube while can improving switching frequency.
It can be seen that, the current control device for static dust-removing power disclosed in the present embodiment includes hysteresis band and controls mould
Block, current hysteresis-band control module and trigger pulse distribute module.Wherein, the hysteresis band control module is used to receive deduster
The set-point of voltage and the actual value of deduster voltage, export the given current value of transformer and the upper limit of hysteresis band with
Limit；The given current value of current hysteresis-band control module receiving transformer, the upper limit of the actual current value of transformer and hysteresis band,
Lower limit, exports total trigger pulse；Trigger pulse distribute module is extracted to total trigger pulse again, is obtained and electrostatic dust collection equipment
Related pulse signal.The present invention is that actual electric signal based on cleaner is produced and electrostatic precipitation with operating procedure signal
Device-dependent pulse signal is controlled to cleaner, and running is simple, fast response time, and then improves dedusting effect
Rate, reduce power consumption.
As shown in fig. 6, the phase path figure of this current control device is the figure of a closing, and there is a stable pole
Ring is limited, no matter system initial state, by once switching transfer process, phase path can all converge on limit cycle, very surely
It is fixed.This current control device is a kind of robustness very strong gamma controller, is more suitable for obvious nonlinear characteristic
Cleaner system.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of current control device for static dust-removing power, it is characterised in that including：
Hysteresis band control module, the hysteresis band control module is used for the set-point for receiving deduster voltage and deduster electricity
The actual value of pressure, and set-point and the given current value of the actual value acquisition transformer of deduster voltage according to deduster voltage
And the upper and lower bound of hysteresis band；
Current hysteresis-band control module, the current hysteresis-band control module is connected with the hysteresis band control module, for receiving
Given current value, the upper limit of the actual current value of transformer and hysteresis band, the lower limit of transformer, and according to the given of transformer
Current value, the upper limit of the actual current value of transformer and hysteresis band, lower limit obtain total trigger pulse；
Trigger pulse distribute module, the trigger pulse distribute module is connected with the current hysteresis-band control module, for receiving
Total trigger pulse, and the extraction pulse signal related to electrostatic dust collection equipment in total trigger pulse.
2. it is used for the current control device of static dust-removing power according to claim 1, it is characterised in that the hysteresis band
Control module, including：
First difference operator, the positive input terminal of first difference operator inputs the set-point of deduster voltage, and described first is poor
The negative input end of arithmetic unit inputs the actual value of deduster voltage, the set-point of the deduster voltage and the reality of deduster voltage
Actual value does difference operation by the first difference operator；
Pi regulator, the input of the pi regulator is connected with the output end of first difference operator, for described
The output result of one difference operator is adjusted, and will adjust given current value of the result as transformer；
Ring width arithmetic unit, the ring width arithmetic unit is connected with the output end of the pi regulator, for the given of receiving transformer
Current value, and according to the default ring width mathematical modeling related to electrostatic dust collection equipment in the ring width arithmetic unit and transformer
Given current value calculates the upper and lower bound for obtaining hysteresis band.
3. it is used for the current control device of static dust-removing power according to claim 2, it is characterised in that the Hysteresis Current
Control module, including：
Second difference operator, the positive input terminal of second difference operator is connected with the output end of the pi regulator, for defeated
Enter the given current value of transformer, the actual current value of the negative input end input transformer of second difference operator, the change
The given current value of depressor and the actual current value of transformer do the reality that difference operation obtains hysteresis band by the second difference operator
Actual value.
First comparator, the hysteresis band upper limit output end phase of the positive input terminal of the first comparator and the ring width arithmetic unit
Even, the upper limit for receiving the hysteresis band, the negative input end of the first comparator is defeated with second difference operator
Go out end to be connected, the actual value for receiving the hysteresis band；
Second comparator, the positive input terminal of second comparator is connected with the output end of second difference operator, uses
In the actual value for receiving the hysteresis band, the hysteresis band of the negative input end of second comparator and the ring width arithmetic unit
Lower limit output end is connected, the lower limit for receiving the hysteresis band；
Rest-set flip-flop, the R ends of the rest-set flip-flop are connected with the output end of the first comparator, the S ends of the rest-set flip-flop
It is connected with the output end of second comparator, the rest-set flip-flop Q ends export total trigger pulse.
4. it is used for the current control device of static dust-removing power according to claim 3, it is characterised in that the trigger pulse
Distribute module, including：
A trigger pulse distributors, the A trigger pulses distributor is connected with the current hysteresis-band control module, total for receiving
Trigger pulse, and extraction A+ trigger pulses and A- trigger pulses in total trigger pulse；
B trigger pulse distributors, the B trigger pulses distributor is connected with the current hysteresis-band control module, total for receiving
Trigger pulse, and extraction B+ trigger pulses and B- trigger pulses in total trigger pulse.
5. it is used for the current control device of static dust-removing power according to claim 4, it is characterised in that the A triggers arteries and veins
Distributor is rushed, including：
First and arithmetic unit, described first receives the first default square wave with the first input end of arithmetic unit, and described first and computing
Second input of device is connected with the current hysteresis-band control module, receives total trigger pulse；
Second and arithmetic unit, described second receives the second default square wave with the first input end of arithmetic unit, and described second and computing
Second input of device is connected with the current hysteresis-band control module, receives total trigger pulse；
First and arithmetic unit, described first and the first input end of arithmetic unit be connected with described first with the output end of arithmetic unit,
Described first and the second input of arithmetic unit be connected with described second with the output end of arithmetic unit；
Second and arithmetic unit, described second and the first input end of arithmetic unit be connected with the output end of described first and arithmetic unit,
Described second and the second input of arithmetic unit receive the 3rd default square wave；
First switch controller, the input of the first switch controller is connected with the output end of described second and arithmetic unit,
The first switch controller exports A+ trigger pulses；
First NOT gate, the first NOT gate input is connected with the output end of described second and arithmetic unit；
Second switch controller, the input of the second switch controller is connected with the output end of first NOT gate, described
Second switch controller exports A- trigger pulses.
6. it is used for the current control device of static dust-removing power according to claim 4, it is characterised in that the B triggers arteries and veins
Distributor is rushed, including：
3rd and arithmetic unit, the described 3rd receives the 4th default square wave with the first input end of arithmetic unit, and the described 3rd and computing
Second input of device is connected with the current hysteresis-band control module, receives total trigger pulse；
4th and arithmetic unit, the described 4th receives the 5th default square wave with the first input end of arithmetic unit, and the described 4th and computing
Second input of device is connected with the current hysteresis-band control module, receives total trigger pulse；
3rd and arithmetic unit, the described 3rd and the first input end of arithmetic unit be connected with the described 3rd with the output end of arithmetic unit,
Described 3rd and the second input of arithmetic unit be connected with the described 4th with the output end of arithmetic unit；
4th and arithmetic unit, the described 4th and the first input end of arithmetic unit be connected with the output end of the described 3rd and arithmetic unit,
Described 4th and the second input of arithmetic unit receive the 6th default square wave；
3rd switch controller, the input of the 3rd switch controller is connected with the output end of the described 4th and arithmetic unit,
3rd switch controller exports B+ trigger pulses；
Second NOT gate, the second NOT gate input is connected with the output end of the described 4th and arithmetic unit；
4th switch controller, the input of the 4th switch controller is connected with the output end of second NOT gate, described
4th switch controller exports B- trigger pulses.
7. it is used for the current control device of static dust-removing power according to claim 4, it is characterised in that the trigger pulse
Distribute module is connected with the drive circuit of electrostatic dust collection equipment, and is triggered to the drive circuit output A+ of the electrostatic dust collection equipment
Pulse, A- trigger pulses, B+ trigger pulses and B- trigger pulses.
8. it is used for the current control device of static dust-removing power according to claim 7, it is characterised in that the A+ triggers arteries and veins
The frequency of punching, A- trigger pulses, B+ trigger pulses and B- trigger pulses is 1kHz-30kHz.
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| CN107262285B (en) | 2023-06-23 |
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