CN105245111B - A kind of control system of high direct voltage output voltage stabilizing and constant-current supply - Google Patents
A kind of control system of high direct voltage output voltage stabilizing and constant-current supply Download PDFInfo
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- CN105245111B CN105245111B CN201510783232.3A CN201510783232A CN105245111B CN 105245111 B CN105245111 B CN 105245111B CN 201510783232 A CN201510783232 A CN 201510783232A CN 105245111 B CN105245111 B CN 105245111B
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Abstract
The present invention relates to the control systems that a kind of high direct voltage exports voltage stabilizing and constant-current supply, are applied to " corona or ionization type atmospherical discharges type " air purification and pure and fresh class equipment product.The control circuit of the present invention is made of pulsewidth modulation integrated chip IC1, capacitance C1~C16, resistance R1~R18, field-effect transistor VT1~VT3, transformer TR1, zener diode DZ1~DZ3, diode D2~D7, inverting amplifier IC2 connections；Resistance R3~the R6, resistance R11~R12, capacitance C4~C5, diode D2, zener diode DZ3 constitute High voltage output constant-current control circuit；Resistance R13, resistance R15~R18, capacitance C15, inverting amplifier IC2 constitute High voltage output controlling circuit of voltage regulation.The present invention can effectively limit the rising of unloaded high pressure, it can be achieved that giving high precision control to output current, voltage, and the overdose of the generation and ozone that can effectively take precautions against disaster accident generates, and be suitable for the updating and upgrading of a product and promote and apply.
Description
Technical field
The present invention relates to the control systems that a kind of control system more particularly to a kind of high direct voltage export voltage stabilizing and constant-current supply
System.
Background technology
As process of industrialization accelerates, the pollution of surrounding air aggravates year by year.So-called " air cleaner, anion production
The electronic products such as raw device ... " are emerged like the mushrooms after rain, which includes prominent domestic company of household appliances group, and external
Company of transnational group and very different domestic medium-sized and small enterprises.All point robbing the market business opportunity brought by environmental degradation.
Make a general survey of the operation principle of its product：It is micro-strainer type, high-pressure electrostatic absorbent-type, electrion air ionization nothing but
Type etc..Its micro-strainer type is the example that physical filtering is not chatted in table.
Other are various to be all built upon；By DC low-voltage or electric main, after electronic switch boosting, rectification, filtering
It is transformed into high voltage direct current, voltage level mostly being lied prostrate 5 kilovolts to 10,000 between more, is applied to and is put by what two metal electrodes formed
On electric-type collecting plate.Using surrounding air as dielectric between its two electrode, a high voltage electric field is formed, air insulation is breakdown
And the electrochemical phenomena of corona discharge is generated, soot dust granule is in the electric field by lotus with negative electrical charge, with electric field force and air fluid force
Energy moved to positive plate, because of the theory that the charges of different polarity are attracted each other, negatively charged flue dust will be attracted to and gather dust just
On pole plate.However, while corona discharge, the ozone derivative of doses can be generated in electric discharge interpolar, yield with
Strength of discharge is closely related with surrounding air, such as in high pressure fluctuations, environment temperature, humidity, air organic matter content mostly because
It is known as pass, if not being precisely controlled, yield has been more than the dosage of national normal value (0.1mg/m3), will be made to human body
At injury, the product constituted by as the injury machine of health of human body is endangered, forbid strictly by national relevant laws and regulations.Due to
The dielectric coefficient of surrounding air is not a constant value in the natural environment, with season, region, air humidity variation and become
Change, therefore high-voltage electricity flow valuve is set under ideal conditions when dispatching from the factory, and can control ozone yield within standard value.But machine
In work destination in use, its High voltage output current value is ever-changing, when working under the high environment of humidity, high-voltage electricity
Flow valuve is increased sharply, and corona discharge is violent, and ozone yield is inevitably exceeded, will seriously threaten health.In air
None declares precedent completely up to standard in purification industry.The electronic air purification machine product listed, no an example is using output
High voltage and constant current and voltage stabilizing control technology, the harm brought and defect are in described herein；It latent to body and composition of estate will threaten.
Invention content
In view of the above problems, to propose a kind of structure design simple, rationally by the present invention, unloaded high pressure can be effectively limited
Rise the super of the generation and ozone that disaster accident can be effectively taken precautions against, it can be achieved that give high precision control to output current, voltage
The control system of high direct voltage output voltage stabilizing and constant-current supply that dosage generates.
Technical scheme is as follows：
The control system of above-mentioned high direct voltage output voltage stabilizing and constant-current supply, the control circuit of the control system are main
By pulsewidth modulation integrated chip IC1, capacitance C1~C16, resistance R1~R18, field-effect transistor VT1~VT3, transformer TR1,
Zener diode DZ1~DZ3, diode D2~D7, inverting amplifier IC2 connections composition；Resistance R3~the R6, resistance R11
~R12, capacitance C4~C5, diode D2, zener diode DZ3 constitute High voltage output constant-current control circuit；The resistance
R13, resistance R15~R18, capacitance C15, inverting amplifier IC2 constitute High voltage output controlling circuit of voltage regulation.
The control system of high direct voltage the output voltage stabilizing and constant-current supply, wherein：The uniform termination of capacitance C1, C2
Ground, the other end connect+9~26V power supplys；The one end the capacitance C3 is grounded, and the other end connects the pulsewidth modulation integrated chip IC1
The 13rd foot；The capacitance C4 is connected between the 1st foot and the 12nd foot of the pulsewidth modulation integrated chip IC1；The capacitance
The one end C5 connects the 16th foot of the pulsewidth modulation integrated chip IC1, other end ground connection；The one end the capacitance C6 is grounded, another
End connects the 5th foot of the pulsewidth modulation integrated chip IC1；
The one end the resistance R1 connects the 9th foot of the pulsewidth modulation integrated chip IC1, and the other end connects the pulsewidth tune
The 1st foot of integrated chip IC1 processed；The one end the resistance R2 connects+9~26V power supplys, and it is integrated that the other end connects the pulsewidth modulation
13rd foot of chip IC 1；The one end the resistance R3 is grounded, and the other end connects the 1st foot of the pulsewidth modulation integrated chip IC1；
The resistance R4 is connected between the 16th foot and the 2nd foot of pulsewidth modulation integrated chip IC1；The one end the resistance R5 is grounded, separately
One end is connected to the 2nd foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R6 connects the pulsewidth modulation and integrates core
The 1st foot of piece IC1, the other end connect the cathode terminal of the diode D2；The one end the resistance R7 connects the pulsewidth modulation collection
At the 5th foot of chip IC 1, the other end connects the 7th foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R8 is grounded,
The other end connects the 6th foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R9 connects the pulsewidth modulation and integrates core
The 14th foot of piece IC1, the other end connect the grid of the field-effect transistor VT2；The capacitance C7 is parallel to the resistance R9
Both ends；The one end the resistance R10 connects the 11st foot of the pulsewidth modulation integrated chip IC1, and the other end connects the field-effect
The grid of transistor VT3；The capacitance C8 is parallel to the both ends the resistance R10；The positive terminal of the capacitance C9 connects the field
The grid of effect transistor VT1, the negative pole end ground connection of the capacitance C9；
The source electrode of the field-effect transistor VT1 is grounded, and drain electrode connects the 8th foot of the pulsewidth modulation integrated chip IC1；
The capacitance C16 positive terminals connect the 8th foot of the pulsewidth modulation integrated chip IC1, negative pole end ground connection；The field effect transistor
The drain electrode of pipe VT2 and VT3 are connected to the primary coil both ends of the transformer TR1, the field-effect transistor VT2 and
The source electrode of VT3 is connected with each other and is grounded together；Tap one end of the transformer TR1 connects+9~26V power supplys, the transformer
The tap other end of TR1 connects the positive terminal of the capacitance C10；The negative pole end of the capacitance C10 is grounded；
The anode tap of the zener diode DZ1 is grounded, and cathode terminal connects the grid of the field-effect transistor VT1；Institute
The anode tap for stating zener diode DZ2 connects the grid of the field-effect transistor VT1, and cathode terminal connects the diode D3's
Cathode terminal；The anode tap of the zener diode DZ3 is grounded, and cathode terminal connects the secondary coil positive terminal of the transformer TR1；
The anode tap of the diode D3 connects the anode tap of the diode D2；The one end the resistance R11 is connected to the diode
The anode tap of D2, D3, the other end connect the secondary coil positive terminal of the transformer TR1；The one end the resistance R12 is grounded, separately
One end connects the secondary coil positive terminal of the transformer TR1；The one end the resistance R13 connects the secondary side of the transformer TR1
Coil electrode end, the other end connect the resistance R15 and are connected to the negative pole end of ionization collection assembly of dust by the resistance R15；
The one end the resistance R16 connects the capacitance C15 and is grounded by the capacitance C15, and the other end connects the resistance R13 and electricity
Hinder the tie point between R15；
The in-phase input end of the inverting amplifier IC2 is grounded by the resistance R17, and inverting input is connected to described
Tie point between resistance R16 and capacitance C15, output end are connected to the 10th foot of the pulsewidth modulation integrated chip IC1；It is described
Resistance R18 is connected between the inverting input and output end of the inverting amplifier IC2；The cathode terminal of the diode D4 connects
It is connected to the secondary coil positive terminal of the transformer TR1, anode tap is connected to the cathode terminal of the diode D5；The diode
The anode tap of D5 is connected to the cathode terminal of the diode D6；The anode tap of the diode D6 is connected to the diode D7's
Cathode terminal；The negative pole end of the anode tap connection ionization collection assembly of dust of the diode D7；The one end the capacitance C11 is connected to described
The secondary coil negative pole end of transformer TR1, the other end are connected to the tie point between the diode D4 and D5；The capacitance
The one end C12 connects the tie point between the diode D4 and D5, and the other end is connected to the company between the diode D6 and D7
Contact；The one end the capacitance C13 is connected to the secondary coil positive terminal of the transformer TR1, and the other end connects the diode
Tie point between D5 and D6；The one end the capacitance C14 connects the tie point between the diode D5 and D6, other end connection
Ionize the negative pole end of collection assembly of dust.
The control system of high direct voltage the output voltage stabilizing and constant-current supply, wherein：The capacitance C1, C3, C9, C10,
C16 is polar capacitor.
The control system of high direct voltage the output voltage stabilizing and constant-current supply, wherein：The pulsewidth modulation integrated chip IC1
The 1st foot be error voltage reverse input end, the 2nd foot of the pulsewidth modulation integrated chip IC1 is and connects reference voltage source
In-phase input end, the pulsewidth modulation integrated chip IC1 the 5th, 6,7 feet collectively form sawtooth wave generating circuit and dead zone function
Circuit, the 8th foot of the pulsewidth modulation integrated chip IC1 are soft start control terminal, the of the pulsewidth modulation integrated chip IC1
9 feet are the output end of error amplifier in integrated circuit, and the 10th foot of the pulsewidth modulation integrated chip IC1 closes for current limit
13rd foot of closed end, the pulsewidth modulation integrated chip IC1 is internal totem driving tube feeder ear, and the pulsewidth modulation is integrated
11,14 feet of chip IC 1 are binary channels totem pillar output driving end, and 16 feet of the pulsewidth modulation integrated chip IC1 are base
Quasi- voltage output end.
The control system of high direct voltage the output voltage stabilizing and constant-current supply, wherein：The anode tap of the diode D2 with
Terminal FG is also led between the resistance R11；The terminal FG is high-tension current sample detection output end.
Advantageous effect：
The control system of high direct voltage output voltage stabilizing and constant-current supply of the present invention, structure design is simple, reasonable, can be effectively
The rising of unloaded high pressure is limited, it can be achieved that giving high precision control to output current, voltage, can effectively take precautions against disaster accident
Occur and the overdose of ozone generates.It is empty that the High voltage output electric current constant control of the present invention is widely used in high direct voltage discharge type
In the engineening goods such as gas purification, anion, disinfection, sterilization, such product of market prevalence is virtually all：By the low electricity of direct current
Pressure or electric main are transformed into several kilovolts or more of DC high voltage, driving electric discharge after electronic switch boosting, rectification, filtering
Or collection assembly of dust, the high voltage of output without voltage stabilizing and constant current, by use environment is influenced voltage, current fluctuation very big, corona
Strength of discharge is uncontrollable, will cause the derivative of corona discharge thus --- and ozone yield is uncontrollable, once it is more than state
The generation dosage of family standard value 0.1mg/m3, it will the body of people is damaged；The respiratory tract of ozone intense stimulus people, is caused
Abscess of throat, causes bronchitis and pulmonary emphysema at cough uncomfortable in chest；Ozone can cause the neurotoxic of people, under dizziness headache, eyesight
Drop, memory loss；Ozone can play destruction to the vitamin E in human skin, cause the skin of people to wrinkle, occur it is black
Spot；Ozone can also destroy the immunity function of human body, induce lymphocyte chromosome lesion, accelerate aging, and pregnant woman is caused to give birth to deformity
Youngster.It can be seen that overdose ozone is very important to the extent of injury of human body, with fresh air, purification of the output high pressure without pressure-stabilizing constant flow
Class engineening goods, the suspicion of nominal in technical indicator " ozone generates dosage and meets national standard " some falsenesses rather.We this
Technology is；Ideal use condition is demarcated first, such as；25 DEG C of environment temperature；It is high that output is adjusted under conditions of relative humidity 75%
Piezoelectricity flow valuve measures ozone yield and is better than national normal value, while just regarding this output high-voltage electricity flow valuve as constant current value benchmark.
Air cleaner product works in any environment and region, and discharge current all will also will imply that ozone produces by constant clamper
Raw amount is never exceeded.
The High voltage output voltage stabilizing control function of the present invention：I.e. after dust suction subassembly load undesirably falls off high voltage power supply, if not
Adding limitation, the high voltage power supply output voltage after zero load that can be increased to --- 1.414 times of rated operational voltage value are up to 1.5
Ten thousand volts of height！The high pressure of the rank has punctured 20 millimeters of air dielectric enough, destroys safe insulation, can be to the person, equipment, property
Safety, which is constituted, greatly to threaten.The high pressure idle voltage stabilizing function of the control circuit design of the present invention, can effectively limit zero load
The rising of high pressure, if the high-voltage-stable value of this circuit configuration is -10KV (lasting accuracy ± 5%), work electricity when nominal load
Pressure is -9KV.Voltage-stabilizing system is failure to actuate when normal work, and nominal load output voltage values are preferential, is loaded high when any moment open circuit
Stabilizing circuit action, output voltage clamper is pressed to limit, the overdose of the generation and ozone that can effectively take precautions against disaster accident generates.It should
For function without application report in similar product, this is also the big innovation of the present invention.
The control circuit of the present invention is based on the collection being integrated with pulse width control (PWM), application condition, multifunction protection
It is core, dc switch high voltage power supply transformation system at circuit.It introduces completely new " high-voltage output end electric current, voltage sampling "
Technology, realizes and gives high precision control to output current, voltage, and highest precision is can be controlled within 5%.It is so high
High voltage output precision just accurately controls for ozone yield and provides guaranteed conditions, is the innovation for being different from routine techniques.
Description of the drawings
Fig. 1 is the electric operation control circuit figure for the control system that high direct voltage of the present invention exports voltage stabilizing and constant-current supply；
Fig. 2 is another electric operation control circuit figure for the control system that high direct voltage of the present invention exports voltage stabilizing and constant-current supply.
Note：
Circuit in Fig. 1 dashed boxes of the present invention is the High voltage output constant-current control circuit of the present invention, and the circuit in Fig. 2 dashed boxes is
The High voltage output controlling circuit of voltage regulation of the present invention.
Specific implementation mode
As shown in Figure 1, 2, the control system of high direct voltage of the present invention output voltage stabilizing and constant-current supply, be applied to " corona or
Ionization type atmospherical discharges type " air purification and pure and fresh class equipment product.High direct voltage of the present invention output voltage stabilizing and constant-current supply
The control circuit of control system mainly by pulsewidth modulation integrated chip IC1, capacitance C1~C16, resistance R1~R13, resistance R15~
R18, field-effect transistor VT1~VT3, transformer TR1, zener diode DZ1~DZ3, diode D2~D7, inverting amplifier
IC2 connections form.
The capacitance C1, C3, C9, C10, C16 are polar capacitor；The 1st foot of pulsewidth modulation integrated chip IC1 is error electricity
Press reverse input end, the 2nd foot of pulsewidth modulation integrated chip IC1 is and the in-phase input end that connects reference voltage source, the pulsewidth
Modulation integrate chip IC 1 the 5th, 6,7 feet collectively form sawtooth wave generating circuit and dead zone function circuit, the pulsewidth modulation is integrated
8th foot of chip IC 1 is soft start control terminal, and the 9th foot of pulsewidth modulation integrated chip IC1 is error amplification in integrated circuit
10th foot of the output end of device, pulsewidth modulation integrated chip IC1 is current limit shutdown side, the pulsewidth modulation integrated chip
The 13rd foot of IC1 is internal totem driving tube feeder ear, and 11,14 feet of pulsewidth modulation integrated chip IC1 are binary channels figure
Pillar output driving end is risen, voltage (Vref) output end on the basis of 16 feet of pulsewidth modulation integrated chip IC1.
The uniform end ground connection of capacitance C1, C2, the other end connect+9~26V power supplys；The one end capacitance C3 is grounded, and the other end connects
Connect the 13rd foot of pulsewidth modulation integrated chip IC1；Capacitance C4 is connected to the 1st foot and the 12nd of pulsewidth modulation integrated chip IC1
Between foot；The one end capacitance C5 connects the 16th foot of pulsewidth modulation integrated chip IC1, other end ground connection；The one end capacitance C6 is grounded, separately
One end connects the 5th foot of pulsewidth modulation integrated chip IC1；The one end resistance R1 connects the 9th foot of pulsewidth modulation integrated chip IC1,
The other end connects the 1st foot of pulsewidth modulation integrated chip IC1；The one end resistance R2 connects+9~26V power supplys, and the other end connects pulsewidth
Modulation integrates the 13rd foot of chip IC 1；The one end resistance R3 is grounded, and the other end connects the 1st foot of pulsewidth modulation integrated chip IC1；
Resistance R4 is connected between the 16th foot and the 2nd foot of pulsewidth modulation integrated chip IC1；The one end resistance R5 is grounded, other end connection
In the 2nd foot of pulsewidth modulation integrated chip IC1；The one end resistance R6 connects the 1st foot of pulsewidth modulation integrated chip IC1, the other end
Connect the cathode terminal of diode D2；The one end resistance R7 connects the 5th foot of pulsewidth modulation integrated chip IC1, and the other end connects pulsewidth
Modulation integrates the 7th foot of chip IC 1；The one end resistance R8 is grounded, and the other end connects the 6th foot of pulsewidth modulation integrated chip IC1；Electricity
The 14th foot of the one end R9 connection pulsewidth modulation integrated chip IC1 is hindered, the other end connects the grid of field-effect transistor VT2；Capacitance
C7 is parallel to the both ends resistance R9；The one end resistance R10 connects the 11st foot of pulsewidth modulation integrated chip IC1, and the other end connects field
The grid of effect transistor VT3；Capacitance C8 is parallel to the both ends resistance R10；The positive terminal of capacitance C9 connects field-effect transistor
The grid of VT1, the negative pole end ground connection of capacitance C9；The source electrode of field-effect transistor VT1 is grounded, and drain electrode connection pulsewidth modulation integrates core
The 8th foot of piece IC1；Capacitance C16 positive terminals connect the 8th foot of pulsewidth modulation integrated chip IC1, negative pole end ground connection；Field-effect is brilliant
The drain electrode of body pipe VT2 and VT3 are connected to the primary coil both ends of transformer TR1, field-effect transistor VT2 and VT3's
Source electrode is connected with each other and is grounded together；Tap one end of transformer TR1 connects+9~26V power supplys, and the other end connects capacitance C10's
Positive terminal；The negative pole end of capacitance C10 is grounded；The anode tap of zener diode DZ1 is grounded, and cathode terminal connects field-effect transistor
The grid of VT1；The grid of the anode tap connection field-effect transistor VT1 of zener diode DZ2, cathode terminal connect diode D3's
Cathode terminal；The anode tap of zener diode DZ3 is grounded, and cathode terminal connects the secondary coil positive terminal of transformer TR1；Diode D3
Anode tap connection diode D2 anode tap；The one end resistance R11 is connected to the anode tap of diode D2, D3, other end connection
The secondary coil positive terminal of transformer TR1；The one end resistance R12 is grounded, and the other end connects the secondary coil anode of transformer TR1
End；The one end resistance R13 connects the secondary coil positive terminal of transformer TR1, and other end connection resistance R15 is simultaneously connected by resistance R15
It is connected to the negative pole end of ionization collection assembly of dust (loading)；The one end resistance R16 connects capacitance C15 and is grounded by capacitance C15, another
Tie point between end connection resistance R13 and resistance R15；The in-phase input end of inverting amplifier IC2 is grounded by resistance R17,
Inverting input is connected to the tie point between resistance R16 and capacitance C15, and output end is connected to pulsewidth modulation integrated chip IC1
The 10th foot；Resistance R18 is connected between the inverting input and output end of inverting amplifier IC2；The cathode terminal of diode D4
It is connected to the secondary coil positive terminal of transformer TR1, anode tap is connected to the cathode terminal of diode D5；The anode tap of diode D5
It is connected to the cathode terminal of diode D6；The anode tap of diode D6 is connected to the cathode terminal of diode D7；The anode of diode D7
End is connected to the negative pole end of ionization collection assembly of dust；The one end capacitance C11 is connected to the secondary coil negative pole end of transformer TR1, another
End is connected to the tie point between diode D4 and D5；The one end capacitance C12 connects the tie point between diode D4 and D5, another
End is connected to the tie point between diode D6 and D7；The one end capacitance C13 is connected to the secondary coil positive terminal of transformer TR1,
The other end connects the tie point between diode D5 and D6；The one end capacitance C14 connects the tie point between diode D5 and D6, separately
The negative pole end of one end connection ionization collection assembly of dust.Meanwhile also leading to terminal between the anode tap and resistance R11 of diode D2
FG, terminal FG are high-tension current sample detection output end, and detection signal is provided for microcontroller, to realize Full Featured intelligence
Expanded function is reserved in control.
Wherein, as shown in Fig. 1 (in dashed box), resistance R3~R6, resistance R11~R12, capacitance C4~C5, diode D2,
Zener diode DZ3 constitutes High voltage output constant-current control circuit.As shown in Fig. 2 (in dashed box), resistance R13, resistance R15~
R18, capacitance C15, inverting amplifier IC2 connections constitute High voltage output controlling circuit of voltage regulation.
Working principle of the present invention is as follows：
After direct-current working volts 9~26V access systems, pulsewidth modulation integrated chip IC1 starts to work, the 11st foot and 14
Foot alternately exports square-wave pulse, and field-effect transistor VT2, VT3 are in recommending switch working state for driving, through high frequency, high pressure transformation
Device TR1 isolation couplings, output square wave alternation high pressure, are constituted via diode D4, D5, D6, D7 and capacitance C11, C12, C13, C14
4 voltage multiplying rectifiers filtering after (present invention be not limited to the series of voltage multiplying rectifier, the form of rectifier boost, output voltage height,
The polarity of output voltage belongs to protected scope), output to ionization collection assembly of dust work.Resistance R12 samples for high-tension current
Resistance is in series with output loop, and when there is high-tension current to flow through in the direction of arrows, resistance electricity will be will produce on resistance R12
Pressure drop UR12, expression formula be UR12=I × R12 (V), when mono- timing UR12 of resistance R12 by be high-tension current I function, be in
Ratio tracking changes.The dynamic electric voltage value is sent into pulsewidth modulation integrated chip IC1 after amplitude limit and unidirectional gating element (DZ3, D2)
The 1st foot of error voltage reverse input end, provide error signal for pulsewidth modulation integrated chip IC1, and connect reference voltage source
The 2nd foot of in-phase input end, after being compared and enlarged in pulsewidth modulation integrated chip IC1, pulse-width is modulated, output
PWM drive signal controls external field-effect transistor VT2, VT3 and carries out duty cycle of switching adjustment, it is constant to reach closed loop output
The purpose of electric current.(such as when certain reasons enable ionization collection assembly of dust load impedance become small；It meets higher humidity and other is ionizable
Gas), High voltage output electric current rises, and the upper voltage drops of current sampling resistor R12 increase, through pulsewidth modulation set at the mistake of chip IC 1
Output pulse duty factor can be reduced after difference, High voltage output voltage declines, and High voltage output power declines, and high-tension current holding is watched
Constant current state is taken, (meets power theorem：P=I × U), and the ionic activity of collection assembly of dust is inhibited, is then reached pair
Effective inhibition of the derivative of corona discharge, that is, ozone yield.
When High voltage output is matched with load rating, output voltage, electric current, power are metastable.But work as dust
Such as without restriction after component load undesirably falls off high voltage power supply, the high voltage power supply output voltage after zero load can be increased suddenly
Extremely --- 1.414 times of rated operational voltage value are up to 1.5 ten thousand volts of height！The high pressure of the rank has punctured 20 millimeters enough
Air dielectric destroys safe insulation, can constitute to the person, equipment, property safety and greatly threaten.The high pressure that the present invention designs is empty
Carry voltage stabilizing function, can effectively limit the rising of unloaded high pressure, the high-voltage-stable value that sets of control circuit of such as present invention as-
10KV (lasting accuracy ± 5%), operating voltage when nominal load are -9KV.Voltage-stabilizing system is failure to actuate when normal work, specified
Load output voltage value is preferential, and high-voltage stabilizing circuit acts when loading any moment open circuit, and output voltage clamper limits, can be effective
The overdose of the generation and ozone of taking precautions against disaster accident generates.Its principle is；High frequency side through high-tension transformer TR1 isolation couplings
Wave alternating voltage after being filtered by cockcroft-walton voltage multiplier, is transformed into smooth high direct voltage, and it is negative to be applied to " ionization collection assembly of dust "
In load, high voltage electric field is formed, generates the electric field force of absorption dust.The High voltage output controlling circuit of voltage regulation includes high tension voltage inspection
Survey, electric resistance partial pressure sampling, paraphase amplification, amplitude compare, control the function modules such as pulse output.Resistance R13, R15 are high with output
Pressure partial pressure sampling, the current potential expression formula of C sample points are：UC=UA × R13/R15+R13, and the potential pole at voltage sampling point C
Property compared with reference ground B points be negative polarity, the of pulsewidth modulation integrated chip IC1 after inverting amplifier IC2 paraphase amplification, must be sent into
10 feet, the 10th foot are " lock-in control end ", and when reaching 0.7V into the foot voltage, chip will carry out Pulse by Pulse operation, small
Adjustment output high pressure tends towards stability in range.Under fortuitous event, high-voltage load is abnormal or open circuit, High voltage output can increase moment,
Reach peak-peak, surpass ten thousand volts or more, high-pressure sampling, inverting amplifier circuit output voltage, which synchronize, at this time increases, when the 10th foot electricity
When the up to 1.7V of position, PWM latch closes pulse output, the at this time energy storage of high-voltage output end in pulsewidth modulation integrated chip IC1
Capacitance terminal voltage is gradually reduced, and also direct ratio declines for the output voltage of inverting amplifier IC2, as pulsewidth modulation integrated chip IC1 the
When 10 foot current potentials are less than 0.7V or less, pulse-recovery is exported, output high pressure rises again, then pulse exports again when reaching above-mentioned threshold values
It can close, so in cycles, enable output high-voltage-stable in setting value, realize the mesh of High voltage output open circuit voltage stabilizing amplitude limit
's.
Structure of the invention design is simple, rationally, can effectively limit the rising of unloaded high pressure, it can be achieved that output current,
Voltage gives high precision control, and the overdose of the generation and ozone that can effectively take precautions against disaster accident generates, suitable for promoting and answering
With.
Claims (2)
1. a kind of control system of high direct voltage output voltage stabilizing and constant-current supply, it is characterised in that：The control of the control system
Circuit is mainly by pulsewidth modulation integrated chip IC1, capacitance C1~C16, resistance R1~R18, field-effect transistor VT1~VT3, change
Depressor TR1, zener diode DZ1~DZ3, diode D2~D7, inverting amplifier IC2 connections composition；Resistance R3~the R6,
Resistance R11~R12, capacitance C4~C5, diode D2, zener diode DZ3 constitute High voltage output constant-current control circuit；It is described
Resistance R13, resistance R15~R18, capacitance C15, inverting amplifier IC2 constitute High voltage output controlling circuit of voltage regulation；
The uniform end ground connection of capacitance C1, C2, the other end connect+9~26V power supplys；The one end the capacitance C3 is grounded, and the other end connects
Connect the 13rd foot of the pulsewidth modulation integrated chip IC1；The capacitance C4 is connected to the of the pulsewidth modulation integrated chip IC1
Between 1 foot and the 12nd foot；The one end the capacitance C5 connects the 16th foot of the pulsewidth modulation integrated chip IC1, other end ground connection；
The one end the capacitance C6 is grounded, and the other end connects the 5th foot of the pulsewidth modulation integrated chip IC1；
The one end the resistance R1 connects the 9th foot of the pulsewidth modulation integrated chip IC1, and the other end connects the pulsewidth modulation collection
At the 1st foot of chip IC 1；The one end the resistance R2 connects+9~26V power supplys, and the other end connects the pulsewidth modulation integrated chip
The 13rd foot of IC1；The one end the resistance R3 is grounded, and the other end connects the 1st foot of the pulsewidth modulation integrated chip IC1；It is described
Resistance R4 is connected between the 16th foot and the 2nd foot of pulsewidth modulation integrated chip IC1；The one end the resistance R5 is grounded, the other end
It is connected to the 2nd foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R6 connects the pulsewidth modulation integrated chip
The 1st foot of IC1, the other end connect the cathode terminal of the diode D2；It is integrated that the one end the resistance R7 connects the pulsewidth modulation
5th foot of chip IC 1, the other end connect the 7th foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R8 is grounded, separately
One end connects the 6th foot of the pulsewidth modulation integrated chip IC1；The one end the resistance R9 connects the pulsewidth modulation integrated chip
The 14th foot of IC1, the other end connect the grid of the field-effect transistor VT2；The capacitance C7 is parallel to the resistance R9 two
End；The one end the resistance R10 connects the 11st foot of the pulsewidth modulation integrated chip IC1, and it is brilliant that the other end connects the field-effect
The grid of body pipe VT3；The capacitance C8 is parallel to the both ends the resistance R10；The positive terminal of the capacitance C9 connects the field effect
Answer the grid of transistor VT1, the negative pole end ground connection of the capacitance C9；
The source electrode of the field-effect transistor VT1 is grounded, and drain electrode connects the 8th foot of the pulsewidth modulation integrated chip IC1；It is described
Capacitance C16 positive terminals connect the 8th foot of the pulsewidth modulation integrated chip IC1, negative pole end ground connection；The field-effect transistor
The drain electrode of VT2 and VT3 is connected to the primary coil both ends of the transformer TR1, the field-effect transistor VT2 and VT3
Source electrode be connected with each other and be grounded together；Tap one end of the transformer TR1 connects+9~26V power supplys, the transformer TR1
The tap other end connect the positive terminal of the capacitance C10；The negative pole end of the capacitance C10 is grounded；
The anode tap of the zener diode DZ1 is grounded, and cathode terminal connects the grid of the field-effect transistor VT1；It is described steady
The anode tap of pressure diode DZ2 connects the grid of the field-effect transistor VT1, and cathode terminal connects the cathode of the diode D3
End；The anode tap of the zener diode DZ3 is grounded, and cathode terminal connects the secondary coil positive terminal of the transformer TR1；It is described
The anode tap of diode D3 connects the anode tap of the diode D2；The one end the resistance R11 is connected to described diode D2, D3
Anode tap, the other end connects the secondary coil positive terminal of the transformer TR1；The one end the resistance R12 is grounded, and the other end connects
Connect the secondary coil positive terminal of the transformer TR1；The one end the resistance R13 is connecting the secondary coil of the transformer TR1 just
Extremely, the other end connects the resistance R15 and is connected to the negative pole end of ionization collection assembly of dust by the resistance R15；The electricity
It hinders the one end R16 to connect the capacitance C15 and be grounded by the capacitance C15, the other end connects the resistance R13 and resistance R15
Between tie point；
The in-phase input end of the inverting amplifier IC2 is grounded by the resistance R17, and inverting input is connected to the resistance
Tie point between R16 and capacitance C15, output end are connected to the 10th foot of the pulsewidth modulation integrated chip IC1；The resistance
R18 is connected between the inverting input and output end of the inverting amplifier IC2；The cathode terminal of the diode D4 is connected to
The secondary coil positive terminal of the transformer TR1, anode tap are connected to the cathode terminal of the diode D5；The diode D5's
Anode tap is connected to the cathode terminal of the diode D6；The anode tap of the diode D6 is connected to the cathode of the diode D7
End；The negative pole end of the anode tap connection ionization collection assembly of dust of the diode D7；The one end the capacitance C11 is connected to the transformation
The secondary coil negative pole end of device TR1, the other end are connected to the tie point between the diode D4 and D5；The capacitance C12 mono-
End connects the tie point between the diode D4 and D5, and the other end is connected to the tie point between the diode D6 and D7；
The one end the capacitance C13 is connected to the secondary coil positive terminal of the transformer TR1, and the other end connects the diode D5 and D6
Between tie point；The one end the capacitance C14 connects the tie point between the diode D5 and D6, other end connection ionization collection
The negative pole end of dirt component；
Described capacitance C1, C3, C9, C10, C16 are polar capacitor；
The 1st foot of the pulsewidth modulation integrated chip IC1 is error voltage reverse input end, the pulsewidth modulation integrated chip
The 2nd foot of IC1 be with the in-phase input end that connects reference voltage source, the pulsewidth modulation integrated chip IC1 the 5th, 6,7 feet it is common
Sawtooth wave generating circuit and dead zone function circuit are constituted, the 8th foot of the pulsewidth modulation integrated chip IC1 controls for soft start
End, the 9th foot of the pulsewidth modulation integrated chip IC1 are the output end of error amplifier in integrated circuit, the pulsewidth modulation
The 10th foot of integrated chip IC1 is current limit shutdown side, and the 13rd foot of the pulsewidth modulation integrated chip IC1 is internal totem
11,14 feet of column driving tube feeder ear, the pulsewidth modulation integrated chip IC1 are binary channels totem pillar output driving end, institute
State voltage output end on the basis of 16 feet of pulsewidth modulation integrated chip IC1.
2. the control system of high direct voltage output voltage stabilizing and constant-current supply as described in claim 1, it is characterised in that：Described two
Terminal FG is also led between the anode tap of pole pipe D2 and the resistance R11；The terminal FG is that high-tension current sample detection is defeated
Outlet.
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| CN111033282B (en) * | 2017-08-09 | 2022-08-19 | 赛峰电气与电源公司 | Fault tolerant solenoid actuation and monitoring |
| CN107769582B (en) * | 2017-11-30 | 2019-10-29 | 中国人民解放军国防科技大学 | Charging circuit for micro pulse plasma thruster |
| CN109921631B (en) * | 2019-03-19 | 2021-06-08 | 西安微电子技术研究所 | Isolated upper bridge bootstrap charge pump circuit for bridge driver and control method |
| CN111812397A (en) * | 2020-08-07 | 2020-10-23 | 珠海格力电器股份有限公司 | Detection circuit and air purification device |
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| JP2012205365A (en) * | 2011-03-24 | 2012-10-22 | Sanken Electric Co Ltd | Switching power supply device |
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