CN105245111A - Control system of high direct voltage output voltage stabilization and constant current source - Google Patents
Control system of high direct voltage output voltage stabilization and constant current source Download PDFInfo
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- CN105245111A CN105245111A CN201510783232.3A CN201510783232A CN105245111A CN 105245111 A CN105245111 A CN 105245111A CN 201510783232 A CN201510783232 A CN 201510783232A CN 105245111 A CN105245111 A CN 105245111A
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Abstract
The present invention relates to a control system of a high direct voltage output voltage stabilization and constant current source, and is applicable to 'corona or ionization air discharging' air purification and freshness implement products. The control circuit provided by the invention is formed by the connection of a pulse width modulation integrated chip IC1, capacitors C1-C16, resistors R1-R18, field effect transistors VT1-VT3, a transformer TR1, voltage-regulator diodes DZ1-DZ3, a diodes D2-D7 and an inverter amplifier IC2. A high voltage output constant-current control circuit is composed of the resistors R3-R6, the resistors R11-R12, the capacitors C4-C5, the diodes D2 and the voltage-regulator diode DZ3. A high voltage output voltage stability control circuit is composed of the resistor R13, the resistors R15-R18, the capacitor C15 and the inverter amplifier IC2. According to the invention, the rising of the no-load high voltage may be effectively restricted, the high precision control of the output current and the output current may be realized, and occurrence of disaster accidents and the overdose generation of the ozone may be effectively prevented, therefore the control system of a high direct voltage output voltage stabilization and constant current source is applicable to the development of new generation, the popularization and the application of products.
Description
Technical field
The present invention relates to a kind of control system, particularly relate to the control system that a kind of high direct voltage exports voltage stabilizing and constant-current supply.
Background technology
Along with process of industrialization is accelerated, the pollution of surrounding air aggravates year by year.So-called " air cleaner, anion generator .... " etc. electronic product emerge like the mushrooms after rain, comprising there being prominent domestic company of household appliances group, with external company of transnational group, and very different domestic medium-sized and small enterprises.All point robbing the market business opportunity brought because of ecological deterioration.
Make a general survey of the operation principle of its product: be nothing but micro-strainer type, high-pressure electrostatic absorbent-type, electrion air ionization type etc.Its micro-strainer type is that physical filtering is not in the example that table is chatted.
Other are various is all based upon; By DC low-voltage or electric main, after electronic switch boosting, rectification, filtering, be transformed into high voltage direct current, its voltage level is many more than 5 kilovolts to 10,000 between volt, is applied on the discharge type collecting plate that is made up of two metal electrodes.Be dielectric with surrounding air between its two electrode, form a high voltage electric field, air insulation is breakdown and produce the electrochemical phenomena of corona discharge, soot dust granule in the electric field by lotus with negative electrical charge, move to positive plate with the energy of electric field force and air fluid power, because of the theory that the charges of different polarity are attracted each other, electronegative flue dust will be attracted on the positive plate that gathers dust.But, while corona discharge, the ozone derivative of doses can be produced between discharge electrode, its generation and strength of discharge and surrounding air closely related, as multifactor relevant in organic content in high pressure fluctuations, ambient temperature, humidity, air etc., if precisely do not controlled, its generation has exceeded the dosage of national normal value (0.1mg/m3), will damage human body, its product formed will become the injury machine of harm health of human body, and national relevant laws and regulations are forbidded strictly.Because the dielectric coefficient of surrounding air is not a constant value in natural environment, changes with the change of season, region, air humidity, when therefore high-tension electricity flow valuve sets under ideal conditions and dispatches from the factory, ozone generation can be controlled within standard value.But machine is when the destination that works uses, and its High voltage output current value is Protean, and when working under the environment that humidity is high, high-tension electricity flow valuve is increased sharply, and corona discharge is violent, and its ozone generation inevitably exceeds standard, will serious threat health.In air cleaning industry, none declares precedent completely up to standard.The electronic air purification machine product now gone on the market, none example adopts and exports high voltage and constant current and voltage stabilizing control technology, and the harm brought and defect are in described herein; To dive to health and composition of estate and threaten.
Summary of the invention
For above problem, the present invention proposes a kind of structural design simple, reasonable, effectively can limit the rising of unloaded high pressure, can realize output current, voltage are given to high precision and controls, the high direct voltage effectively can taking precautions against the generation of disaster accident and the overdosage generation of ozone exports the control system of voltage stabilizing and constant-current supply.
Technical scheme of the present invention is as follows:
Above-mentioned high direct voltage exports the control system of voltage stabilizing and constant-current supply, and the control circuit of described control system connects to form primarily of pulse-width modulation integrated chip IC1, electric capacity C1 ~ C16, resistance R1 ~ R18, field-effect transistor VT1 ~ VT3, transformer TR1, voltage stabilizing didoe DZ1 ~ DZ3, diode D2 ~ D7, inverting amplifier IC2; Described resistance R3 ~ R6, resistance R11 ~ R12, electric capacity C4 ~ C5, diode D2, voltage stabilizing didoe DZ3 constitute High voltage output constant-current control circuit; Described resistance R13, resistance R15 ~ R18, electric capacity C15, inverting amplifier IC2 constitute High voltage output controlling circuit of voltage regulation.
Described high direct voltage exports the control system of voltage stabilizing and constant-current supply, and wherein: the homogeneous end ground connection of described electric capacity C1, C2, the other end connects+9 ~ 26V power supply; Described electric capacity C3 one end ground connection, the other end connects the 13rd pin of described pulse-width modulation integrated chip IC1; Between the 1st pin that described electric capacity C4 is connected to described pulse-width modulation integrated chip IC1 and the 12nd pin; Described electric capacity C5 one end connects the 16th pin of described pulse-width modulation integrated chip IC1, other end ground connection; Described electric capacity C6 one end ground connection, the other end connects the 5th pin of described pulse-width modulation integrated chip IC1;
Described resistance R1 one end connects the 9th pin of described pulse-width modulation integrated chip IC1, and the other end connects the 1st pin of described pulse-width modulation integrated chip IC1; Described resistance R2 one end connects+9 ~ 26V power supply, and the other end connects the 13rd pin of described pulse-width modulation integrated chip IC1; Described resistance R3 one end ground connection, the other end connects the 1st pin of described pulse-width modulation integrated chip IC1; Described resistance R4 is connected between the 16th pin of pulse-width modulation integrated chip IC1 and the 2nd pin; Described resistance R5 one end ground connection, the other end is connected to the 2nd pin of described pulse-width modulation integrated chip IC1; Described resistance R6 one end connects the 1st pin of described pulse-width modulation integrated chip IC1, and the other end connects the cathode terminal of described diode D2; Described resistance R7 one end connects the 5th pin of described pulse-width modulation integrated chip IC1, and the other end connects the 7th pin of described pulse-width modulation integrated chip IC1; Described resistance R8 one end ground connection, the other end connects the 6th pin of described pulse-width modulation integrated chip IC1; Described resistance R9 one end connects the 14th pin of described pulse-width modulation integrated chip IC1, and the other end connects the grid of described field-effect transistor VT2; Described electric capacity C7 is parallel to described resistance R9 two ends; Described resistance R10 one end connects the 11st pin of described pulse-width modulation integrated chip IC1, and the other end connects the grid of described field-effect transistor VT3; Described electric capacity C8 is parallel to described resistance R10 two ends; The positive terminal of described electric capacity C9 connects the grid of described field-effect transistor VT1, the negative pole end ground connection of described electric capacity C9;
The source ground of described field-effect transistor VT1, drain electrode connects the 8th pin of described pulse-width modulation integrated chip IC1; Described electric capacity C16 positive terminal connects the 8th pin of described pulse-width modulation integrated chip IC1, negative pole end ground connection; The drain electrode of described field-effect transistor VT2 and VT3 is connected to the primary coil two ends of described transformer TR1, the source electrode of described field-effect transistor VT2 with VT3 be connected with each other and together with ground connection; Tap one end of described transformer TR1 connects+9 ~ 26V power supply, and the tap other end of described transformer TR1 connects the positive terminal of described electric capacity C10; The negative pole end ground connection of described electric capacity C10;
The anode tap ground connection of described voltage stabilizing didoe DZ1, cathode terminal connects the grid of described field-effect transistor VT1; The anode tap of described voltage stabilizing didoe DZ2 connects the grid of described field-effect transistor VT1, and cathode terminal connects the cathode terminal of described diode D3; The anode tap ground connection of described voltage stabilizing didoe DZ3, cathode terminal connects the secondary coil positive terminal of described transformer TR1; The anode tap of described diode D3 connects the anode tap of described diode D2; Described resistance R11 one end is connected to the anode tap of described diode D2, D3, and the other end connects the secondary coil positive terminal of described transformer TR1; Described resistance R12 one end ground connection, the other end connects the secondary coil positive terminal of described transformer TR1; Described resistance R13 one end connects the secondary coil positive terminal of described transformer TR1, and the other end is connected described resistance R15 and is connected to the negative pole end of ionization collection assembly of dust by described resistance R15; Described resistance R16 one end connects described electric capacity C15 and by described electric capacity C15 ground connection, the other end connects the tie point between described resistance R13 and resistance R15;
The in-phase input end of described inverting amplifier IC2 is by described resistance R17 ground connection, and inverting input is connected to the tie point between described resistance R16 and electric capacity C15, and output is connected to the 10th pin of described pulse-width modulation integrated chip IC1; Between the inverting input that described resistance R18 is connected to described inverting amplifier IC2 and output; The cathode terminal of described diode D4 is connected to the secondary coil positive terminal of described transformer TR1, and anode tap is connected to the cathode terminal of described diode D5; The anode tap of described diode D5 is connected to the cathode terminal of described diode D6; The anode tap of described diode D6 is connected to the cathode terminal of described diode D7; The anode tap of described diode D7 connects the negative pole end of ionization collection assembly of dust; Described electric capacity C11 one end is connected to the secondary coil negative pole end of described transformer TR1, and the other end is connected to the tie point between described diode D4 and D5; Described electric capacity C12 one end connects the tie point between described diode D4 and D5, and the other end is connected to the tie point between described diode D6 and D7; Described electric capacity C13 one end is connected to the secondary coil positive terminal of described transformer TR1, and the other end connects the tie point between described diode D5 and D6; Described electric capacity C14 one end connects the tie point between described diode D5 and D6, and the other end connects the negative pole end of ionization collection assembly of dust.
Described high direct voltage exports the control system of voltage stabilizing and constant-current supply, wherein: described electric capacity C1, C3, C9, C10, C16 are polar capacitor.
Described high direct voltage exports the control system of voltage stabilizing and constant-current supply, wherein: the 1st pin of described pulse-width modulation integrated chip IC1 is error voltage reverse input end, 2nd pin of described pulse-width modulation integrated chip IC1 is and the in-phase input end connecing reference voltage source, the 5th of described pulse-width modulation integrated chip IC1, 6, 7 pin form sawtooth wave generating circuit and dead zone function circuit jointly, 8th pin of described pulse-width modulation integrated chip IC1 is soft start control end, 9th pin of described pulse-width modulation integrated chip IC1 is the output of error amplifier in integrated circuit, 10th pin of described pulse-width modulation integrated chip IC1 is current limit shutdown side, 13rd pin of described pulse-width modulation integrated chip IC1 is inner totem driving tube feeder ear, 11 of described pulse-width modulation integrated chip IC1, 14 pin are that binary channels totem pillar exports drive end, 16 pin of described pulse-width modulation integrated chip IC1 are reference voltage output end.
Described high direct voltage exports the control system of voltage stabilizing and constant-current supply, wherein: also lead to terminal FG between the anode tap of described diode D2 and described resistance R11; Described terminal FG is that high-tension current sampling detects output.
Beneficial effect:
High direct voltage of the present invention exports the control system of voltage stabilizing and constant-current supply, structural design is simple, reasonable, effectively can limit the rising of unloaded high pressure, can realize output current, voltage are given to high precision and controls, the overdosage of the generation and ozone that effectively can take precautions against disaster accident produces.High voltage output current constant of the present invention controls to be widely used in the air cleaning of high direct voltage discharge type, anion, sterilization, in the engineening goods such as sterilization, popular this series products in market is almost all: by DC low-voltage or electric main, boost through electronic switch, rectification, the DC high voltage of more than several kilovolts is transformed into after filtering, drive electric discharge or collection assembly of dust, the high voltage exported is without voltage stabilizing and constant current, voltage is affected by environment for use, current fluctuation is very large, corona discharge intensity is uncontrollable, the derivative of corona discharge will be caused for this reason---ozone generation is uncontrollable, once exceed the generation dosage of national normal value 0.1mg/m3, will damage the health of people, the respiratory tract of ozone intense stimulus people, causes abscess of throat, cough uncomfortable in chest, causes bronchitis and pulmonary emphysema, ozone can cause the neurotoxic of people, dizziness headache, visual impairment, is losing one's memory, ozone can play destruction to the vitamin E in human body skin, cause the skin of people wrinkling, there is blackspot, ozone also can destroy the immunity function of human body, brings out lymphocyte chromosome pathology, accelerates old and feeble, causes pregnant woman to have a deformed child.The extent of injury of visible overdosage ozone to human body is very important, exports with fresh air, the purification class engineening goods of high pressure without pressure-stabilizing constant flow, the suspicion of nominal in technical indicator " ozone produces dosage and meets GB " some falseness rather.Our this technology is; First desirable service condition is demarcated, as; Ambient temperature 25 DEG C; Regulation output high-tension electricity flow valuve under the condition of relative humidity 75%, measures ozone generation and is better than national normal value, this is exported high-tension electricity flow valuve just as constant current value benchmark simultaneously.Air cleaner product is in any environment and region work, and its discharging current all by constant clamper, also will will mean that ozone generation exceeds standard never.
High voltage output voltage stabilizing controlling functions of the present invention: namely after dust suction subassembly load surprisingly departs from high voltage source, as without restriction, the high voltage source output voltage after zero load can be increased to---and 1.414 times of rated operational voltage value, will reach the height of 1.5 ten thousand volts! The high pressure foot of this rank has punctured the air dielectric of 20 millimeters, destroys safe insulation, can form threat greatly to the person, equipment, property safety.The high pressure idle voltage stabilizing function of design on control circuit of the present invention, just can limit the rising of unloaded high pressure effectively, and the high-voltage-stable value as this circuit configuration is-10KV (lasting accuracy ± 5%), and operating voltage during nominal load is-9KV.During normal work, voltage-stabilizing system is failure to actuate, and nominal load output voltage values is preferential, high-voltage stabilizing circuit action when load any moment opens a way, and output voltage clamper limits, and the overdosage of the generation and ozone that effectively can take precautions against disaster accident produces.This function is without application report in like product, and this is also of the present invention one to innovate greatly.
Control circuit of the present invention is core based on the integrated circuit be integrated with pulse width control (PWM), application condition, multifunction protection, DC switch high voltage source transformation system.Introduce brand-new " high-voltage output end electric current, voltage sampling " technology, achieve and give high precision to output current, voltage and control, most high precision can be controlled within 5%.So high High voltage output precision, just accurately controlling to provide guaranteed conditions for ozone generation, is the innovation being different from routine techniques.
Accompanying drawing explanation
Fig. 1 is the control circuit figure that high direct voltage of the present invention exports the control system of voltage stabilizing and constant-current supply;
Fig. 2 is another control circuit figure that high direct voltage of the present invention exports the control system of voltage stabilizing and constant-current supply.
Note:
Circuit in the empty frame of Fig. 1 of the present invention is High voltage output constant-current control circuit of the present invention, and the circuit in the empty frame of Fig. 2 is High voltage output controlling circuit of voltage regulation of the present invention.
Embodiment
As shown in Figure 1, 2, high direct voltage of the present invention exports the control system of voltage stabilizing and constant-current supply, is applied to " corona or ionization type atmospherical discharges type " air cleaning and pure and fresh class facility product.The control circuit that high direct voltage of the present invention exports the control system of voltage stabilizing and constant-current supply connects to form primarily of pulse-width modulation integrated chip IC1, electric capacity C1 ~ C16, resistance R1 ~ R13, resistance R15 ~ R18, field-effect transistor VT1 ~ VT3, transformer TR1, voltage stabilizing didoe DZ1 ~ DZ3, diode D2 ~ D7, inverting amplifier IC2.
This electric capacity C1, C3, C9, C10, C16 are polar capacitor, 1st pin of this pulse-width modulation integrated chip IC1 is error voltage reverse input end, 2nd pin of this pulse-width modulation integrated chip IC1 is and the in-phase input end connecing reference voltage source, the 5th of this pulse-width modulation integrated chip IC1, 6, 7 pin form sawtooth wave generating circuit and dead zone function circuit jointly, 8th pin of this pulse-width modulation integrated chip IC1 is soft start control end, 9th pin of this pulse-width modulation integrated chip IC1 is the output of error amplifier in integrated circuit, 10th pin of this pulse-width modulation integrated chip IC1 is current limit shutdown side, 13rd pin of this pulse-width modulation integrated chip IC1 is inner totem driving tube feeder ear, 11 of this pulse-width modulation integrated chip IC1, 14 pin are that binary channels totem pillar exports drive end, 16 pin of this pulse-width modulation integrated chip IC1 are reference voltage (Vref) output.
The homogeneous end ground connection of this electric capacity C1, C2, the other end connects+9 ~ 26V power supply; This electric capacity C3 one end ground connection, the other end connects the 13rd pin of pulse-width modulation integrated chip IC1; Between the 1st pin that electric capacity C4 is connected to this pulse-width modulation integrated chip IC1 and the 12nd pin; Electric capacity C5 one end connects the 16th pin of pulse-width modulation integrated chip IC1, other end ground connection; Electric capacity C6 one end ground connection, the other end connects the 5th pin of pulse-width modulation integrated chip IC1; Resistance R1 one end connects the 9th pin of pulse-width modulation integrated chip IC1, and the other end connects the 1st pin of pulse-width modulation integrated chip IC1; Resistance R2 one end connects+9 ~ 26V power supply, and the other end connects the 13rd pin of pulse-width modulation integrated chip IC1; Resistance R3 one end ground connection, the other end connects the 1st pin of pulse-width modulation integrated chip IC1; Resistance R4 is connected between the 16th pin of pulse-width modulation integrated chip IC1 and the 2nd pin; Resistance R5 one end ground connection, the other end is connected to the 2nd pin of pulse-width modulation integrated chip IC1; Resistance R6 one end connects the 1st pin of pulse-width modulation integrated chip IC1, and the other end connects the cathode terminal of diode D2; Resistance R7 one end connects the 5th pin of pulse-width modulation integrated chip IC1, and the other end connects the 7th pin of pulse-width modulation integrated chip IC1; Resistance R8 one end ground connection, the other end connects the 6th pin of pulse-width modulation integrated chip IC1; Resistance R9 one end connects the 14th pin of pulse-width modulation integrated chip IC1, and the other end connects the grid of field-effect transistor VT2; Electric capacity C7 is parallel to this resistance R9 two ends; Resistance R10 one end connects the 11st pin of pulse-width modulation integrated chip IC1, and the other end connects the grid of field-effect transistor VT3; Electric capacity C8 is parallel to this resistance R10 two ends; The positive terminal of electric capacity C9 connects the grid of field-effect transistor VT1, the negative pole end ground connection of electric capacity C9; The source ground of field-effect transistor VT1, drain electrode connects the 8th pin of pulse-width modulation integrated chip IC1; Electric capacity C16 positive terminal connects the 8th pin of pulse-width modulation integrated chip IC1, negative pole end ground connection; The drain electrode of field-effect transistor VT2 and VT3 is connected to the primary coil two ends of transformer TR1, the source electrode of this field-effect transistor VT2 with VT3 be connected with each other and together with ground connection; Tap one end of transformer TR1 connects+9 ~ 26V power supply, and the other end connects the positive terminal of electric capacity C10; The negative pole end ground connection of electric capacity C10; The anode tap ground connection of voltage stabilizing didoe DZ1, cathode terminal connects the grid of field-effect transistor VT1; The anode tap of voltage stabilizing didoe DZ2 connects the grid of field-effect transistor VT1, and cathode terminal connects the cathode terminal of diode D3; The anode tap ground connection of voltage stabilizing didoe DZ3, the secondary coil positive terminal of cathode terminal connection transformer TR1; The anode tap of diode D3 connects the anode tap of diode D2; Resistance R11 one end is connected to the anode tap of diode D2, D3, the secondary coil positive terminal of other end connection transformer TR1; Resistance R12 one end ground connection, the secondary coil positive terminal of other end connection transformer TR1; The secondary coil positive terminal of resistance R13 one end connection transformer TR1, other end contact resistance R15 is also connected to the negative pole end ionizing collection assembly of dust (i.e. load) by resistance R15; Resistance R16 one end connects electric capacity C15 and passes through electric capacity C15 ground connection, the tie point between other end contact resistance R13 and resistance R15; The in-phase input end of inverting amplifier IC2 is by resistance R17 ground connection, and inverting input is connected to the tie point between resistance R16 and electric capacity C15, and output is connected to the 10th pin of pulse-width modulation integrated chip IC1; Between the inverting input that resistance R18 is connected to inverting amplifier IC2 and output; The cathode terminal of diode D4 is connected to the secondary coil positive terminal of transformer TR1, and anode tap is connected to the cathode terminal of diode D5; The anode tap of diode D5 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 tap of diode D7 is connected to the negative pole end of ionization collection assembly of dust; Electric capacity C11 one end is connected to the secondary coil negative pole end of transformer TR1, and the other end is connected to the tie point between diode D4 and D5; Electric capacity C12 one end connects the tie point between diode D4 and D5, and the other end is connected to the tie point between diode D6 and D7; Electric capacity C13 one end is connected to the secondary coil positive terminal of transformer TR1, and the other end connects the tie point between diode D5 and D6; Electric capacity C14 one end connects the tie point between diode D5 and D6, and the other end connects the negative pole end of ionization collection assembly of dust.Meanwhile, also lead to terminal FG between the anode tap of this diode D2 and resistance R11, this terminal FG is that high-tension current sampling detects output, for single-chip microcomputer provides detection signal, reserves expanded function for realizing Full Featured intelligentized control method.
Wherein, as shown in Fig. 1 (in empty frame), this resistance R3 ~ R6, resistance R11 ~ R12, electric capacity C4 ~ C5, diode D2, voltage stabilizing didoe DZ3 constitute High voltage output constant-current control circuit.As shown in Fig. 2 (in empty frame), this resistance R13, resistance R15 ~ R18, electric capacity C15, inverting amplifier IC2 have connected to form High voltage output controlling circuit of voltage regulation.
Operation principle of the present invention is as follows:
After direct-current working volts 9 ~ 26V connecting system, pulse-width modulation integrated chip IC1 starts working, its the 11st pin and 14 pin alternately export square-wave pulse, drive field-effect transistor VT2, VT3 is in recommending switch working state, through high frequency, high-tension transformer TR1 isolation coupling, export square wave alternation high pressure, via diode D4, D5, D6, D7 and electric capacity C11, C12, C13, after the 4 voltage multiplying rectifier filtering that C14 is formed, (the present invention is not limited to the progression of voltage multiplying rectifier, the form of rectifier boost, the height of output voltage, the polarity of output voltage all belongs to protected category), export the work of ionization collection assembly of dust to.Resistance R12 is high-tension current sample resistance, be in series with output loop, when there being high-tension current to flow through in the direction of arrows, resistance R12 will produce ohmic drop UR12, its expression formula is UR12=I × R12 (V), when the function that resistance R12 mono-timing UR12 will be high-tension current I, follow the tracks of in ratio and change.This dynamic electric voltage value sends into error voltage reverse input end the 1st pin of pulse-width modulation integrated chip IC1 after amplitude limit and unilateral gate element (DZ3, D2), for pulse-width modulation integrated chip IC1 provides error signal, with in-phase input end the 2nd pin connecing reference voltage source, after comparing and enlarging in pulse-width modulation integrated chip IC1, pulse-width is modulated, export PWM drive singal, control external field-effect transistor VT2, VT3 and carry out duty cycle of switching adjustment, reach the object that closed loop exports constant current.When some reason order ionization collection assembly of dust load impedance diminishes (as; Meet higher humidity and other ionogenic gases), High voltage output electric current rises, on current sampling resistor R12, voltage drop increases, become after chip IC 1 application condition can reduce to export pulse duty factor through pulsewidth modulation set, High voltage output voltage drop, High voltage output power drop, high-tension current keeps servo constant stream mode, (meeting power theorem: P=I × U), and the ionic activity of collection assembly of dust is suppressed, then reach effective suppression of derivative to corona discharge and ozone generation.
When High voltage output mates with load rating, its output voltage, electric current, power are metastable.But after collection assembly of dust load surprisingly departs from high voltage source, as without restriction, the high voltage source output voltage after zero load can suddenly be increased to---1.414 times of rated operational voltage value, will reach the height of 1.5 ten thousand volts! The high pressure foot of this rank has punctured the air dielectric of 20 millimeters, destroys safe insulation, can form threat greatly to the person, equipment, property safety.The high pressure idle voltage stabilizing function of the present invention's design, can limit the rising of unloaded high pressure effectively, and the high-voltage-stable value set as control circuit of the present invention is as-10KV (lasting accuracy ± 5%), and operating voltage during nominal load is-9KV.During normal work, voltage-stabilizing system is failure to actuate, and nominal load output voltage values is preferential, high-voltage stabilizing circuit action when load any moment opens a way, and output voltage clamper limits, and the overdosage of the generation and ozone that effectively can take precautions against disaster accident produces.Its principle is; Through the high frequency square wave alternating voltage of high-tension transformer TR1 isolation coupling, after cockcroft-walton voltage multiplier filtering, be transformed into level and smooth high direct voltage, be applied in " ionization collection assembly of dust " load, form high voltage electric field, produce the electric field force of absorption dust.This High voltage output controlling circuit of voltage regulation include high tension voltage detection, electric resistance partial pressure sampling, paraphase amplification, Amplitude Ratio comparatively, the functional module such as control impuls output.Resistance R13, R15 and output high pressure dividing potential drop sample, the current potential expression formula of C sampling point is: UC=UA × R13/R15+R13, and the polarities of potentials at voltage sampling point C place is negative polarity compared with reference ground B point, must after inverting amplifier IC2 paraphase be amplified, send into the 10th pin of pulse-width modulation integrated chip IC1,10th pin is " lock-in control end ", will carry out Pulse by Pulse operation when entering chip when this pin voltage reaches 0.7V, and among a small circle, adjustment output high pressure tends towards stability.Under fortuitous event, high-voltage load is abnormal or open a way, High voltage output can raise instantaneously, reach peak-peak, surpass more than ten thousand volts, now high-pressure sampling, inverting amplifier circuit output voltage synchronously raises, when the 10th pin current potential high to 1.7V time, in pulse-width modulation integrated chip IC1, PWM latch cuts out pulse output, now the storage capacitor terminal voltage of high-voltage output end declines gradually, the output voltage also direct ratio decline of inverting amplifier IC2, when pulse-width modulation integrated chip IC1 the 10th pin current potential is lower than below 0.7V, export pulse-recovery, export high pressure to rise again, when reaching above-mentioned threshold values again, pulse exports and can close again, so go round and begin again, order exports high-voltage-stable in set point, achieve the object of High voltage output open circuit voltage stabilizing amplitude limit.
Structural design of the present invention is simple, reasonable, effectively can limit the rising of unloaded high pressure, can realize output current, voltage are given to high precision and controls, and the overdosage of the generation and ozone that effectively can take precautions against disaster accident produces, and is suitable for propagation and employment.
Claims (5)
1. high direct voltage exports a control system for voltage stabilizing and constant-current supply, it is characterized in that: the control circuit of described control system connects to form primarily of pulse-width modulation integrated chip IC1, electric capacity C1 ~ C16, resistance R1 ~ R18, field-effect transistor VT1 ~ VT3, transformer TR1, voltage stabilizing didoe DZ1 ~ DZ3, diode D2 ~ D7, inverting amplifier IC2; Described resistance R3 ~ R6, resistance R11 ~ R12, electric capacity C4 ~ C5, diode D2, voltage stabilizing didoe DZ3 constitute High voltage output constant-current control circuit; Described resistance R13, resistance R15 ~ R18, electric capacity C15, inverting amplifier IC2 constitute High voltage output controlling circuit of voltage regulation.
2. high direct voltage exports the control system of voltage stabilizing and constant-current supply as claimed in claim 1, it is characterized in that: the homogeneous end ground connection of described electric capacity C1, C2, and the other end connects+9 ~ 26V power supply; Described electric capacity C3 one end ground connection, the other end connects the 13rd pin of described pulse-width modulation integrated chip IC1; Between the 1st pin that described electric capacity C4 is connected to described pulse-width modulation integrated chip IC1 and the 12nd pin; Described electric capacity C5 one end connects the 16th pin of described pulse-width modulation integrated chip IC1, other end ground connection; Described electric capacity C6 one end ground connection, the other end connects the 5th pin of described pulse-width modulation integrated chip IC1;
Described resistance R1 one end connects the 9th pin of described pulse-width modulation integrated chip IC1, and the other end connects the 1st pin of described pulse-width modulation integrated chip IC1; Described resistance R2 one end connects+9 ~ 26V power supply, and the other end connects the 13rd pin of described pulse-width modulation integrated chip IC1; Described resistance R3 one end ground connection, the other end connects the 1st pin of described pulse-width modulation integrated chip IC1; Described resistance R4 is connected between the 16th pin of pulse-width modulation integrated chip IC1 and the 2nd pin; Described resistance R5 one end ground connection, the other end is connected to the 2nd pin of described pulse-width modulation integrated chip IC1; Described resistance R6 one end connects the 1st pin of described pulse-width modulation integrated chip IC1, and the other end connects the cathode terminal of described diode D2; Described resistance R7 one end connects the 5th pin of described pulse-width modulation integrated chip IC1, and the other end connects the 7th pin of described pulse-width modulation integrated chip IC1; Described resistance R8 one end ground connection, the other end connects the 6th pin of described pulse-width modulation integrated chip IC1; Described resistance R9 one end connects the 14th pin of described pulse-width modulation integrated chip IC1, and the other end connects the grid of described field-effect transistor VT2; Described electric capacity C7 is parallel to described resistance R9 two ends; Described resistance R10 one end connects the 11st pin of described pulse-width modulation integrated chip IC1, and the other end connects the grid of described field-effect transistor VT3; Described electric capacity C8 is parallel to described resistance R10 two ends; The positive terminal of described electric capacity C9 connects the grid of described field-effect transistor VT1, the negative pole end ground connection of described electric capacity C9;
The source ground of described field-effect transistor VT1, drain electrode connects the 8th pin of described pulse-width modulation integrated chip IC1; Described electric capacity C16 positive terminal connects the 8th pin of described pulse-width modulation integrated chip IC1, negative pole end ground connection; The drain electrode of described field-effect transistor VT2 and VT3 is connected to the primary coil two ends of described transformer TR1, the source electrode of described field-effect transistor VT2 with VT3 be connected with each other and together with ground connection; Tap one end of described transformer TR1 connects+9 ~ 26V power supply, and the tap other end of described transformer TR1 connects the positive terminal of described electric capacity C10; The negative pole end ground connection of described electric capacity C10;
The anode tap ground connection of described voltage stabilizing didoe DZ1, cathode terminal connects the grid of described field-effect transistor VT1; The anode tap of described voltage stabilizing didoe DZ2 connects the grid of described field-effect transistor VT1, and cathode terminal connects the cathode terminal of described diode D3; The anode tap ground connection of described voltage stabilizing didoe DZ3, cathode terminal connects the secondary coil positive terminal of described transformer TR1; The anode tap of described diode D3 connects the anode tap of described diode D2; Described resistance R11 one end is connected to the anode tap of described diode D2, D3, and the other end connects the secondary coil positive terminal of described transformer TR1; Described resistance R12 one end ground connection, the other end connects the secondary coil positive terminal of described transformer TR1; Described resistance R13 one end connects the secondary coil positive terminal of described transformer TR1, and the other end is connected described resistance R15 and is connected to the negative pole end of ionization collection assembly of dust by described resistance R15; Described resistance R16 one end connects described electric capacity C15 and by described electric capacity C15 ground connection, the other end connects the tie point between described resistance R13 and resistance R15;
The in-phase input end of described inverting amplifier IC2 is by described resistance R17 ground connection, and inverting input is connected to the tie point between described resistance R16 and electric capacity C15, and output is connected to the 10th pin of described pulse-width modulation integrated chip IC1; Between the inverting input that described resistance R18 is connected to described inverting amplifier IC2 and output; The cathode terminal of described diode D4 is connected to the secondary coil positive terminal of described transformer TR1, and anode tap is connected to the cathode terminal of described diode D5; The anode tap of described diode D5 is connected to the cathode terminal of described diode D6; The anode tap of described diode D6 is connected to the cathode terminal of described diode D7; The anode tap of described diode D7 connects the negative pole end of ionization collection assembly of dust; Described electric capacity C11 one end is connected to the secondary coil negative pole end of described transformer TR1, and the other end is connected to the tie point between described diode D4 and D5; Described electric capacity C12 one end connects the tie point between described diode D4 and D5, and the other end is connected to the tie point between described diode D6 and D7; Described electric capacity C13 one end is connected to the secondary coil positive terminal of described transformer TR1, and the other end connects the tie point between described diode D5 and D6; Described electric capacity C14 one end connects the tie point between described diode D5 and D6, and the other end connects the negative pole end of ionization collection assembly of dust.
3. high direct voltage as claimed in claim 2 exports the control system of voltage stabilizing and constant-current supply, it is characterized in that: described electric capacity C1, C3, C9, C10, C16 are polar capacitor.
4. high direct voltage as claimed in claim 2 exports the control system of voltage stabilizing and constant-current supply, it is characterized in that: the 1st pin of described pulse-width modulation integrated chip IC1 is error voltage reverse input end, 2nd pin of described pulse-width modulation integrated chip IC1 is and the in-phase input end connecing reference voltage source, the 5th of described pulse-width modulation integrated chip IC1, 6, 7 pin form sawtooth wave generating circuit and dead zone function circuit jointly, 8th pin of described pulse-width modulation integrated chip IC1 is soft start control end, 9th pin of described pulse-width modulation integrated chip IC1 is the output of error amplifier in integrated circuit, 10th pin of described pulse-width modulation integrated chip IC1 is current limit shutdown side, 13rd pin of described pulse-width modulation integrated chip IC1 is inner totem driving tube feeder ear, 11 of described pulse-width modulation integrated chip IC1, 14 pin are that binary channels totem pillar exports drive end, 16 pin of described pulse-width modulation integrated chip IC1 are reference voltage output end.
5. high direct voltage as claimed in claim 2 exports the control system of voltage stabilizing and constant-current supply, it is characterized in that: also lead to terminal FG between the anode tap of described diode D2 and described resistance R11; Described terminal FG is that high-tension current sampling detects output.
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| CN105245111B (en) | 2018-08-17 |
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