CN109586600A - A kind of air cleaning unit DEP power supply using dielectrophoresis technology - Google Patents
A kind of air cleaning unit DEP power supply using dielectrophoresis technology Download PDFInfo
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- CN109586600A CN109586600A CN201811532334.8A CN201811532334A CN109586600A CN 109586600 A CN109586600 A CN 109586600A CN 201811532334 A CN201811532334 A CN 201811532334A CN 109586600 A CN109586600 A CN 109586600A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Sampling And Sample Adjustment (AREA)
- Electrostatic Separation (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a kind of DEP power supplys of the air cleaning unit using dielectrophoresis technology comprising DEP controller, DEP signal generator, SPWM generator, driver, signal mixer, isolating output transformer, feedback isolation transformer, demultiplexing circuit, auto_steady amplitude feedback control loop, detection loop；DEP controller is sequentially connected electrically with DEP signal generator, SPWM generator, driver, signal mixer, isolating output transformer, feedback isolation transformer and demultiplexing circuit, and demultiplexing circuit is connected to DEP controller by auto_steady amplitude feedback control loop；Demultiplexing circuit connect with detection loop and is connected to DEP controller；Auto_steady amplitude feedback loop signal is connected to DEP signal generator.The present invention can produce the non-homogeneous AC field of dielectrophoresis needed for dielectrophoresis air cleaning unit, frequency, amplitude and the waveform of flexibly changing DEP output, to meet the needs of different type dielectrophoresis air cleaning unit.
Description
Technical field
It is that one kind is non-for dielectrophoresis air cleaning unit generation dielectrophoresis the present invention relates to dielectrophoresis technical field
The DEP special power supply of uniform AC field.
Background technique
Dielectrophoresis is described the electroneutral particle positioned at non-well-balanced electric field and is generated due to the effect of dielectric polarization
Translational motion.The dipole moment generated on particle can be indicated by two identical carried charges but opposite polarity charge, when it
In mal-distribution on granular boundary, generate a macroscopical dipole moment.When this dipole moment is located in unshapeliness electric field,
The different of local electric field strength on particle both sides generate a resulting net force, referred to as dielectrophoresis force.Due to being suspended in medium
Particle has different dielectric properties (dielectric constant) from medium, and the direction that particle can enhance towards electric field strength is mobile, referred to as positive
Property dielectrophoresis, if otherwise the direction weakened towards electric field strength of particle is mobile, referred to as feminine gender dielectrophoresis.
As particle (radius r, relative dielectric constant εp, conductivityσp) being suspended in fluid media (medium), (relative dielectric constant is
εf, conductivity σf) when, the dielectrophoresis force that is received are as follows:
In formula:(here:)；E is additional
The root mean square of electric field strength；ε0It is permittivity of vacuum；ω is electric field angular frequency.DEP power direction will depend on k*The real number of (ω)
Part, i.e. the CM factor are positive dielectrophoresis in CM > 0, and particle is from existing fringing field regional movement to high electric field region
Negative dielectrophoresis.
In the prior art, air cleaning generallys use Cottrell process, is to utilize electrophoresis (electrophoresis, EP)
Principle, ionize the gas molecule in air in high-voltage dc, generate a large amount of electronics and ion, in the work of electric field force
Towards the electrode movement electrically opposite with electronics and ion under.The dust particles in air-flow are encountered in moving process makes its lotus
Electricity, Charged particle are acted in electric field force to electrode movement, realize the separation of solids or liquid particle and air-flow.Industry
Above widely applied is tube-type esp and Elex precipitator.
Unlike electrophoretic techniques:
(1) dielectrophoresis manipulation is electroneutral particle, makes its effect due to dielectric polarization and the translational motion that generates；
Electrophoresis manipulation is electronics and ion, its load is made to generate displacement on dust particles.
(2) particle motion is unrelated with the direction of electric field in dielectrophoresis, only dielectric constant and medium with itself
Dielectric constant it is related；Particle motion depends on the direction of the electrically charged symbol and electric field of particle, electric field side in electrophoresis
To reversion, then the direction of motion is inverted.
(3) dielectrophoresis needs inhomogeneous field；Electrophoresis can all occur in field uniform or heterogeneous.
(4) size of dielectrophoresis force is proportional to cube of particle diameter；The size of electrophoretic force is proportional to particle and is charged
The number of lotus.
(5) dielectrophoresis technology is using AC field, and electrophoretic techniques is using DC electric field, when the electricity in medium
After pole is passed through direct current, the charged particle because that cannot offset converges in opposite polarity electricity due to mentioned-above electrophoretic effect
Pole surface, generates the effect for being similar to electrostatic screen, and external electronic field is reduced to 0.It is produced between being thus not achieved in the electrodes
The effect of raw non-uniform electric field.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of for generating AC dielectric electrophoresis electric field
Power source special meets the use needs of dielectrophoresis air cleaning unit.
A kind of DEP power supply of the air cleaning unit using dielectrophoresis technology comprising DEP controller, DEP signal hair
Raw device, SPWM generator, driver, signal mixer, isolating output transformer, feedback isolation transformer, demultiplexing circuit,
Auto_steady amplitude feedback control loop, detection loop；DEP controller is mixed with DEP signal generator, SPWM generator, driver, signal
Device, isolating output transformer, feedback isolation transformer and demultiplexing circuit are sequentially connected electrically, and demultiplexing circuit passes through automatic
Fixed ampllitude feedback control loop is connected to DEP controller；Demultiplexing circuit connect with detection loop and is connected to DEP controller；Automatically
Fixed ampllitude feedback loop signal is connected to DEP signal generator.
Moreover, the auto_steady amplitude feedback control loop includes peak detector, mean filter and active leveling circuit, it is described
Demultiplexing circuit is sequentially connected the peak detector, mean filter and active leveling circuit, the DEP controller it is defeated
Outlet connects active leveling circuit, and active leveling circuit output is connected to DEP signal generator.
Moreover, the detection loop includes detection pulse amplifying circuit, response signal split circuit, response signal amplification electricity
Road, detection pulse driving circuit, the demultiplexing circuit successively through detection pulse amplifying circuit, response signal split circuit,
Response signal amplifying circuit is connected to DEP controller, and DEP controller is detected pulse driving circuit and is connected to signal mixing electricity
Road.
A kind of control method of the DEP power supply of the air cleaning unit using dielectrophoresis technology comprising following steps:
1) the DEP output signal such as amplitude, output frequency that DEP controller setting DEP power supply exports；DEP controller according to
Timing requirements issue detection pulse and gate-control signal, while detecting return pulse；According to calibration pulse and to the sound for returning to pulse
Suitable given value should be calculated to DEP signal generator and auto_steady amplitude feedback control loop；DEP signal generator issues as required
DEP waveform carries out power amplification to signal by driver, through signal by forming SPWM modulating wave after the modulation of SPWM generator
After mixer is mixed with detection pulse, exported after being boosted by isolating output transformer；
2) DEP power supply output DEP output signal and detection impulse response signal by feedback isolation transformer pressure-reducing send to
Demultiplexing circuit, the gate-control signal issued by DEP controller separate DEP output signal with detection impulse response signal
It is sent respectively afterwards to auto_steady amplitude feedback control loop and detection loop；
3) the DEP signal isolated by demultiplexing circuit detects the peak value electricity of DEP signal by peak detector first
Pressure, then mean value calculation is carried out by amplitude of the mean filter to DEP signal, finally enter active leveling circuit；Automatic steady
Width circuit receives the amplitude from mean filter and DEP controller and gives, the waveform width of adjust automatically DEP signal generator
Degree guarantees the stabilization of DEP output amplitude；
4) the detection pulse signal isolated by demultiplexing circuit passes through detection pulse amplifying circuit and response signal point
It isolates the response signal of DEP detection pulse from circuit and is further amplified by response signal amplifying circuit and send to DEP controller,
DEP controller calculates optimal DEP given value by analysis response signal.
Advantages of the present invention and effective effect are as follows:
1, the DEP power supply of the air cleaning unit using dielectrophoresis technology of the invention, the DEP letter of circuit in main channel
Number generator is a high-precision voltage controlled oscillator, into SPWM generator after generate SPWM modulating wave, enter driver later
Power amplification is carried out, drive circuitry voltage is low pressure+20V or+50V, and generation amplitude is+20V or+50V SWPM wave, warp
LC filtering after with detection pulse signal mix by every transformer isolation and boost be high-pressure peak be 200V-300V AC-DEP letter
Number, it is applied to dielectrophoresis electrode, to generate non-homogeneous AC field.
2, the DEP power supply of the air cleaning unit using dielectrophoresis technology of the invention, detection pulse are sent out by controller
It is raw, for when detect the load characteristic of DEP electrode in fact, feedback transformer, which is returned, isolates detection pulse through circuits such as Signal separators
Response signal, which is sent, is analyzed to controller response signal and is calculated optimal DEP given value.
3, the DEP power supply of the air cleaning unit using dielectrophoresis technology of the invention, auto_steady amplitude feedback control loop by
Peak detector, mean filter, active leveling circuit are constituted, and the AC-DEP signal isolated through split circuit is examined by peak value
Wave device detects AC-DEP signal peak voltage and carries out average value processing to crest voltage by mean filter, is sent later to automatic
Fixed amplitude circuit adjusts DEP signal generator output amplitude, and the amplitude of the AC-DEP waveform of output is made to keep stablizing.
4, the DEP power supply of the air cleaning unit using dielectrophoresis technology in the present invention, can produce dielectrophoresis
The non-homogeneous AC field of dielectrophoresis needed for air cleaning unit, frequency, amplitude and the wave of flexibly changing DEP output
Shape, to meet the needs of different type dielectrophoresis air cleaning unit.
Detailed description of the invention
Fig. 1 is dielectrophoresis technology air cleaning unit DEP power principle block diagram provided by the invention.
In figure:
1-DEP controller 2-DEP signal generator 3-SPWM generator
4- driver 5- signal mixer 6- isolating output transformer
7- feedback isolation transformer 8- demultiplexing circuit 9- peak detector
10- mean filter 11- active leveling circuit 12- detects pulse amplifying circuit
13- response signal split circuit 14- response signal amplifying circuit 15- detects pulse driving circuit
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
A kind of DEP power supply of the air cleaning unit using dielectrophoresis technology comprising DEP controller 1, DEP signal
Generator 2, SPWM generator 3, driver 4, signal mixer 5, isolating output transformer 6, feedback isolation transformer 7, signal
Split circuit 8, auto_steady amplitude feedback control loop, detection loop；DEP controller and DEP signal generator, SPWM generator, driving
Device, signal mixer, isolating output transformer, feedback isolation transformer and demultiplexing circuit are sequentially connected electrically, Signal separator
Circuit is connected to DEP controller by auto_steady amplitude feedback control loop；Demultiplexing circuit connect with detection loop and is connected to DEP
Controller；Auto_steady amplitude feedback loop signal is connected to DEP signal generator.
Auto_steady amplitude feedback control loop includes peak detector 9, mean filter 10 and active leveling circuit 11, Signal separator
Circuit is sequentially connected peak detector, mean filter and active leveling circuit, and the output end of DEP controller connects auto_steady amplitude
Circuit, active leveling circuit output are connected to DEP signal generator.
Detection loop include detection pulse amplifying circuit 12, response signal split circuit 13, response signal amplifying circuit 14,
Pulse driving circuit 15 is detected, demultiplexing circuit is successively believed through detection pulse amplifying circuit, response signal split circuit, response
Number amplifying circuit is connected to DEP controller, and DEP controller is connected to signal mixed circuit through detecting pulse driving circuit.
In main channel the DEP signal generator of circuit be a high-precision voltage controlled oscillator, into SPWM generator after produce
Raw SPWM modulating wave enters driver later and carries out power amplification, and drive circuitry voltage is low pressure+20V or+50V, is generated
Amplitude is+20V or+50V SWPM wave, is isolated and is risen by isolating output transformer with detection pulse signal mixing after LC is filtered
Pressure is the AC-DEP signal that high-pressure peak is 200V-300V, dielectrophoresis electrode is applied to, to generate non-homogeneous alternating current
?.
Detection pulse is occurred by DEP controller, for when detect the load characteristic of DEP electrode in fact, feedback transformer returns
Detection impulse response signal is isolated through circuits such as Signal separators to send to DEP controller response signal is analyzed and calculated
Optimal DEP given value.
Auto_steady amplitude feedback control loop is made of peak detector, mean filter, active leveling circuit.Through split circuit point
The AC-DEP signal separated out detects AC-DEP signal peak voltage and by mean filter to crest voltage by peak detector
Average value processing is carried out, is sent later to active leveling circuit and adjusts DEP signal generator output amplitude, makes the AC-DEP wave of output
The amplitude of shape keeps stablizing.
The control method of the above-mentioned DEP power supply of the air cleaning unit using dielectrophoresis technology comprising following steps:
1) the DEP output signal such as amplitude, output frequency that DEP controller setting DEP power supply exports；DEP controller according to
Timing requirements issue detection pulse and gate-control signal, while detecting return pulse；According to calibration pulse and to the sound for returning to pulse
Suitable given value should be calculated to DEP signal generator and auto_steady amplitude feedback control loop；DEP signal generator issues as required
DEP waveform carries out power amplification to signal by driver, through signal by forming SPWM modulating wave after the modulation of SPWM generator
After mixer is mixed with detection pulse, exported after being boosted by isolating output transformer；
2) DEP power supply output DEP output signal and detection impulse response signal by feedback isolation transformer pressure-reducing send to
Demultiplexing circuit, the gate-control signal issued by DEP controller separate DEP output signal with detection impulse response signal
It is sent respectively afterwards to auto_steady amplitude feedback control loop and detection loop；
3) the DEP signal isolated by demultiplexing circuit detects the peak value electricity of DEP signal by peak detector first
Pressure, then mean value calculation is carried out by amplitude of the mean filter to DEP signal, finally enter active leveling circuit；Automatic steady
Width circuit receives the amplitude from mean filter and DEP controller and gives, the waveform width of adjust automatically DEP signal generator
Degree guarantees the stabilization of DEP output amplitude；
4) the detection pulse signal isolated by demultiplexing circuit passes through detection pulse amplifying circuit and response signal point
It isolates the response signal of DEP detection pulse from circuit and is further amplified by response signal amplifying circuit and send to DEP controller,
DEP controller calculates optimal DEP given value by analysis response signal.
Claims (4)
1. a kind of DEP power supply of the air cleaning unit using dielectrophoresis technology, it is characterised in that: including DEP controller,
DEP signal generator, SPWM generator, driver, signal mixer, isolating output transformer, feedback isolation transformer, signal
Split circuit, auto_steady amplitude feedback control loop, detection loop；DEP controller and DEP signal generator, SPWM generator, driving
Device, signal mixer, isolating output transformer, feedback isolation transformer and demultiplexing circuit are sequentially connected electrically, Signal separator
Circuit is connected to DEP controller by auto_steady amplitude feedback control loop；Demultiplexing circuit connect with detection loop and is connected to DEP
Controller；Auto_steady amplitude feedback loop signal is connected to DEP signal generator.
2. a kind of DEP power supply of the air cleaning unit using dielectrophoresis technology, feature exist according to claim 1
In: the auto_steady amplitude feedback control loop includes peak detector, mean filter and active leveling circuit, the Signal separator electricity
Road is sequentially connected the peak detector, mean filter and active leveling circuit, and the output end connection of the DEP controller is certainly
Dynamic fixed amplitude circuit, active leveling circuit output are connected to DEP signal generator.
3. a kind of DEP power supply of the air cleaning unit using dielectrophoresis technology according to claim 1 or claim 2, feature
Be: the detection loop includes detection pulse amplifying circuit, response signal split circuit, response signal amplifying circuit, detection
Pulse driving circuit, the demultiplexing circuit is successively through detecting pulse amplifying circuit, response signal split circuit, response signal
Amplifying circuit is connected to DEP controller, and DEP controller is connected to signal mixed circuit through detecting pulse driving circuit.
4. a kind of control method of the DEP power supply of the air cleaning unit using dielectrophoresis technology according to claim 1,
It is characterized by comprising following steps:
1) the DEP output signal such as amplitude, output frequency that DEP controller setting DEP power supply exports；DEP controller is according to timing
It is required that issuing detection pulse and gate-control signal, while detecting return pulse；According to calibration pulse and to the response meter for returning to pulse
Suitable given value is calculated to DEP signal generator and auto_steady amplitude feedback control loop；DEP signal generator issues DEP as required
Waveform is carried out power amplification to signal by driver, is mixed through signal by forming SPWM modulating wave after the modulation of SPWM generator
After device is mixed with detection pulse, exported after being boosted by isolating output transformer；
2) the DEP output signal of DEP power supply output and detection impulse response signal are sent by feedback isolation transformer pressure-reducing to signal
Split circuit, the gate-control signal issued by DEP controller divide after separating DEP output signal with detection impulse response signal
It does not send to auto_steady amplitude feedback control loop and detection loop；
3) the DEP signal isolated by demultiplexing circuit detects the crest voltage of DEP signal by peak detector first, then
Mean value calculation is carried out by amplitude of the mean filter to DEP signal, finally enters active leveling circuit；Active leveling circuit
It is given to receive the amplitude from mean filter and DEP controller, the wave-shape amplitude of adjust automatically DEP signal generator guarantees
The stabilization of DEP output amplitude；
4) the detection pulse signal isolated by demultiplexing circuit separates electricity by detection pulse amplifying circuit and response signal
It isolates the response signal of DEP detection pulse and is further amplified by response signal amplifying circuit and sent to DEP controller, DEP in road
Controller calculates optimal DEP given value by analysis response signal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532334.8A CN109586600A (en) | 2018-12-14 | 2018-12-14 | A kind of air cleaning unit DEP power supply using dielectrophoresis technology |
| CN201911293383.5A CN110943631A (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
| CN201922253618.XU CN211859973U (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532334.8A CN109586600A (en) | 2018-12-14 | 2018-12-14 | A kind of air cleaning unit DEP power supply using dielectrophoresis technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109586600A true CN109586600A (en) | 2019-04-05 |
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ID=65929597
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811532334.8A Pending CN109586600A (en) | 2018-12-14 | 2018-12-14 | A kind of air cleaning unit DEP power supply using dielectrophoresis technology |
| CN201911293383.5A Pending CN110943631A (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
| CN201922253618.XU Expired - Fee Related CN211859973U (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911293383.5A Pending CN110943631A (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
| CN201922253618.XU Expired - Fee Related CN211859973U (en) | 2018-12-14 | 2019-12-16 | DEP power supply of air purification device adopting dielectrophoresis technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN109586600A (en) |
-
2018
- 2018-12-14 CN CN201811532334.8A patent/CN109586600A/en active Pending
-
2019
- 2019-12-16 CN CN201911293383.5A patent/CN110943631A/en active Pending
- 2019-12-16 CN CN201922253618.XU patent/CN211859973U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN110943631A (en) | 2020-03-31 |
| CN211859973U (en) | 2020-11-03 |
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Application publication date: 20190405 |