CN104377962A - Direct-current and high-voltage power supply of flocking machine - Google Patents
Direct-current and high-voltage power supply of flocking machine Download PDFInfo
- Publication number
- CN104377962A CN104377962A CN201410609770.6A CN201410609770A CN104377962A CN 104377962 A CN104377962 A CN 104377962A CN 201410609770 A CN201410609770 A CN 201410609770A CN 104377962 A CN104377962 A CN 104377962A
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- Prior art keywords
- voltage
- circuit
- power supply
- current
- pwm generator
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Classifications
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
The invention provides a direct-current and high-voltage power supply of a flocking machine. The direct-current and high-voltage power supply of the flocking machine comprises an EMI filter, a rectification filtering circuit, an inverter circuit, a high-frequency transformer, a voltage doubling rectifying circuit, an auxiliary power supply, a current feedback circuit, a PWM generator and a control circuit, wherein the EMI filter is connected with the urban network voltage and used for filtering out high-frequency clutter and noise; the rectification filtering circuit is connected with the EMI filter and used for rectifying and filtering alternating current voltage to be direct current voltage; the inverter circuit is connected with the rectification filtering circuit and used for converting the direct current voltage output by the rectification filtering circuit to be high-frequency alternating current voltage according to PWM waves output by the PWM generator; the control circuit is connected with the current feedback circuit and the PWM generator and used for controlling the duty ratio of the PWM waves output by the PWM generator according to current signals of the current feedback circuit. By the adoption of the technical scheme, the efficient and stable direct-current and high-voltage power supply is implemented through a simpler structure, so that the flocking effect is better.
Description
Technical field
The invention belongs to field of textile equipment, particularly relate to a kind of DC high-voltage power supply of flocking machine.
Background technology
In existing flocking technique, fine hair is adsorbed on base fabric by electrostatic absorption principle by flocked fabric, and to be adhesively fixed on base fabric by fine hair by applying glue on base fabric, then through to steam and finished product flocked fabric is processed in washing.Fine hair makes it bring negative electrical charge to replant in fabric by electrostatic flocking apparatus, how flocking effect depends primarily on electrostatic flocking apparatus, and most important part is exactly DC high-voltage power supply in electrostatic flocking apparatus, can whole flocking machine normally effectively run the power supply all depending on efficient stable.
Therefore, for the above-mentioned defect existed in currently available technology, be necessary to study in fact, to provide a kind of scheme, solve the defect existed in prior art.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides a kind of flocking machine DC high-voltage power supply of efficient stable, to solve the problem.
For solving prior art Problems existing, technical scheme of the present invention is:
A DC high-voltage power supply for flocking machine, comprises electromagnetic interface filter, current rectifying and wave filtering circuit, inverter circuit, high frequency transformer, voltage doubling rectifing circuit, accessory power supply, current feedback circuit, PWM generator and control circuit, wherein,
Described electromagnetic interface filter is connected with urban network electricity pressure, for filtering high frequency spurs and noise;
Described current rectifying and wave filtering circuit is connected with described electromagnetic interface filter, for ac voltage rectifier is filtered into direct voltage;
Described inverter circuit is connected with current rectifying and wave filtering circuit, according to the PWM ripple that PWM generator exports, converts the direct voltage that described current rectifying and wave filtering circuit exports to high-frequency ac voltage;
Described high frequency transformer is connected with described inverter circuit, for being carried out boosting by described high-frequency ac voltage and sending to described voltage doubling rectifing circuit;
Described voltage doubling rectifing circuit is connected with described high frequency transformer, for exporting high-voltage dc voltage;
Described accessory power supply is connected with described electromagnetic interface filter, for DC high-voltage power supply in-line power;
Described current feedback circuit is connected with described voltage doubling rectifing circuit, for feeding back the current signal of described voltage doubling rectifing circuit and sending to described control circuit;
Described control circuit is connected with described PWM generator with described current feedback circuit, for controlling the duty ratio of the PWM ripple that described PWM generator exports according to the current signal of described current feedback circuit.
Preferably, described electromagnetic interface filter adopts two-layer configuration.
Preferably, described inverter circuit is half-bridge converter.
Preferably, described voltage doubling rectifing circuit is four voltage doubling rectifing circuits.
Preferably, described PWM generator adopts the SG3525 chip that American Silicon General Corporation produces.
Preferably, described control circuit adopts IR2110 chip.
Compared with prior art, adopt such scheme of the present invention, realize a kind of efficient stable DC high-voltage power supply with the more simple structure of one, thus make flocking effect better.
Accompanying drawing explanation
Fig. 1 is the theory diagram of flocking machine DC high-voltage power supply of the present invention;
Fig. 2 is the schematic diagram of electromagnetic interface filter in Fig. 1;
Fig. 3 is the schematic diagram of inverter circuit in Fig. 1;
Fig. 4 is the circuit working procedure chart shown in Fig. 3;
Fig. 5 is the schematic diagram of voltage doubling rectifing circuit in Fig. 1.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
On the contrary, the present invention is contained any by the substituting of making on marrow of the present invention and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the present invention, in hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.
In order to solve this technical problem, the present invention proposes the simple electrostatic spinning case of a kind of structure.
See Fig. 1, be depicted as the structure chart of electrostatic spinning case of the present invention, comprise electromagnetic interface filter, current rectifying and wave filtering circuit, inverter circuit, high frequency transformer, voltage doubling rectifing circuit, accessory power supply, current feedback circuit, PWM generator and control circuit, wherein,
Described electromagnetic interface filter is connected with urban network electricity pressure, for filtering high frequency spurs and noise;
Described current rectifying and wave filtering circuit is connected with described electromagnetic interface filter, for ac voltage rectifier is filtered into direct voltage;
Described inverter circuit is connected with current rectifying and wave filtering circuit, according to the PWM ripple that PWM generator exports, converts the direct voltage that described current rectifying and wave filtering circuit exports to high-frequency ac voltage;
Described high frequency transformer is connected with described inverter circuit, for being carried out boosting by described high-frequency ac voltage and sending to described voltage doubling rectifing circuit;
Described voltage doubling rectifing circuit is connected with described high frequency transformer, for exporting high-voltage dc voltage;
Described accessory power supply is connected with described electromagnetic interface filter, for DC high-voltage power supply in-line power;
Described current feedback circuit is connected with described voltage doubling rectifing circuit, for feeding back the current signal of described voltage doubling rectifing circuit and sending to described control circuit;
Described control circuit is connected with described PWM generator with described current feedback circuit, for controlling the duty ratio of the PWM ripple that described PWM generator exports according to the current signal of described current feedback circuit.
The operation principle of DC high-voltage power supply shown in Fig. 1 is: input city net 220V alternating voltage, high frequency spurs and noise is fallen through noise reduction filtering, the direct voltage of about 300V is obtained again through rectifying and wave-filtering, the inverter circuit of power supply converts high-frequency ac voltage to direct current, two-stage boosting is have employed in boosting part, first boost through high frequency transformer, then the voltage after boosting is sent in four voltage-multiplying circuits, finally export high-voltage dc voltage.Control circuit exports PWM ripple signal, is sent in inverter, have also been devised protective circuit in circuit: electric current, voltage etc. through control circuit.
See Fig. 2, be depicted as the schematic diagram of electromagnetic interface filter, adopt two-stage EMI filtering, previous stage is made up of differential mode capacitor C1 and common mode inductance L1, and rear stage is made up of differential mode capacitor C2, common mode capacitance C3 and C4 and common mode inductance L2.What differential mode capacitor C1 and C2 selected is thin-film capacitor, and span is 0.01 ~ 0.1uF.Electric capacity C3, C4 ceramic condenser, be used for suppressing common mode disturbances, span is 2200pF ~ 0.1uF.Two-stage EMI filtering, to the clutter in filtering electrical network, homophase disturbance current and slacken electromagnetic radiation etc. and have good effect.
See Fig. 3, be depicted as the schematic diagram of inverter circuit, adopt half-bridge converter.Whether great or small (120V or 220V), the circuit shown in Fig. 3 is all about 320V by the direct voltage after full-bridge rectification to the urban network electricity pressure of input.Closed and disconnection and the input voltage of S1 have relation, and S1 closes, and show that input voltage is 220V, on the contrary, then input voltage is 120V.In fact S1 is not real switch, but a node, this node can change the state of S1 according to difference input: Push And Release.
When S1 is in off-state, filter circuit is full-bridge rectification, and two filter capacitors (C1, C2) are cascaded, and the voltage swing now inputted is 220V.When S1 is in closure state, the functional similarity of two voltage-multiplying circuits that the function of circuit and resistance capacitance are together in series, the voltage now between AB is 120V.
Input 220V alternating voltage during the design, when Q1 and Q2 not yet starts working, electric capacity C1 and C2 is charged, and their output voltage is equal to the half of supply voltage, if input voltage is Ui, then U
c1=U
c2=U
i2.When half-bridge converter works, Q1 and Q2 is alternate conduction, whether to power tube alternate conduction controlled by gate driving pulse voltage control, and driving pulse has dead band, the ON time of each switching tube is less than 0.5 cycle, and ideally the oscillogram of continuous current mode pattern as shown in Figure 4.
T
0n1in the stage, switching tube Q1 conducting, Q2 ends.Current circuit is U
i(+) → Q1 → Np → C2 → U
i(-);
C1(+)→Q1→Np→C1(-)。At this moment C1 electric discharge, C2 charges; U
c1decline gradually, U
c2rise gradually, keep U
c1+ U
c2=U
i.C1 both end voltage U
c1be added on a winding Np of high frequency transformer T through Q1, and ignore Q1 pressure drop, transformer primary voltage is: u
p=U
c1≈ U
i2.
Its polarity is that upper proper lower end is born.D, S voltage across poles u of Q2
dS2=U
i.
T
0n2in the stage, Q2 conducting, Q1 ends.Current circuit is → C1 → Np → Q2 → U
i(-); C2 (+) → Np → Q1 → C2 (-).Now C2 electric discharge, C1 charges; U
c2decline gradually, U
c1rise gradually, keep U
c1+ U
c2=U
i.C2 both end voltage U
c2be added on a winding Np of high frequency transformer T through Q2, and ignore Q2 pressure drop, transformer primary voltage is: u
p=-U
c1≈-U
i2.
Its polarity is that upper end is negative lower proper.D, S voltage across poles u of Q1
dS1=U
i.
Because C1 or C2 terminal voltage in discharge process declines gradually, therefore u
pthe top abbreviation of waveform is skewed.When circuit symmetrical, U
c1and U
c2mean value be U
i2.When Q1 and Q2 ends, as long as transformer magnetizing current maximum is less than load current component, then u
p=0, u
dS1=u
dS2=U
i2.
T
on1=t
0n2=t
on, transformer winding is formed the square wave pulse voltage of positive and negative half cycle symmetry.Secondary winding N
s1=N
s2=N
s, the voltage of each secondary winding is:
Freedom from unbalance be half-bridge inverter self with ability.Such as, if t memory time of Q1 and Q2
sdifference, t
s1>t
s2make Q1 longer than the ON time of Q2, then the discharge time of electric capacity C1 is longer than the discharge time of C2, and during the electric discharge of C1, the average electrical at two ends when discharging than C2 is forced down by the average voltage at two ends.Therefore, at the positive half cycle of Q1 conducting, N
pthe voltage magnitude at winding two ends is lower and the duration is longer; At the negative half period of Q2 conducting, N
pthe voltage magnitude at winding two ends is higher and the duration is shorter.U can be made like this
p" weber " of positive-negative half-cycle is long-pending equal and do not produce unidirectional magnetic bias scene.Due to the anti-unbalance ability that half-bridge variator itself is certain, the coupling capacitance with primary windings in series therefore can not be connect.But, when design circuit, also have and access coupling capacitance in half-bridge variator, the effect of such design circuit: not only can the anti-unbalance ability of intensifier circuit, and can prevent magnetic core of transformer because of half-bridge inversion circuit asymmetric and saturated, the such as property difference of two power switch pipes.
See Fig. 5, be depicted as the schematic diagram of voltage doubling rectifing circuit, adopt voltage doubling rectifing circuit.The operation principle of four or four multiplication of voltages is: when u2 is in first positive half period, namely the voltage on u2 is upper just lower negative, utilize diode unilateral conduction, first diode D1 conducting, C1 starts charging, charge volume equals the voltage of transformer secondary, and the polarity of its electric capacity is left negative positive and negative, and voltage magnitude is U2.When to negative half period, diode D2 conducting, D1 ends, due to negative half period time, transformer-secondary voltage is lower just upper negative, and the discharge voltage polarity of electric capacity C1 is constant, so C1 and U2 series connection is to C2, being charged to its voltage is 2U2, to the 3rd cycle, namely during positive half cycle, D3 conducting, this is that secondary, the electric capacity C1 and electric capacity C2 of transformer is together in series together to C3 charging, makes its both end voltage reach 2U2, and its polarity of voltage be leftly just bearing the right side.To the period 4, namely during negative half period, D4 conducting, C3 is charged to 2U2 by D4 to C5.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a DC high-voltage power supply for flocking machine, is characterized in that: comprise electromagnetic interface filter, current rectifying and wave filtering circuit, inverter circuit, high frequency transformer, voltage doubling rectifing circuit, accessory power supply, current feedback circuit, PWM generator and control circuit, wherein,
Described electromagnetic interface filter is connected with urban network electricity pressure, for filtering high frequency spurs and noise;
Described current rectifying and wave filtering circuit is connected with described electromagnetic interface filter, for ac voltage rectifier is filtered into direct voltage;
Described inverter circuit is connected with current rectifying and wave filtering circuit, according to the PWM ripple that PWM generator exports, converts the direct voltage that described current rectifying and wave filtering circuit exports to high-frequency ac voltage;
Described high frequency transformer is connected with described inverter circuit, for being carried out boosting by described high-frequency ac voltage and sending to described voltage doubling rectifing circuit;
Described voltage doubling rectifing circuit is connected with described high frequency transformer, for exporting high-voltage dc voltage;
Described accessory power supply is connected with described electromagnetic interface filter, for DC high-voltage power supply in-line power;
Described current feedback circuit is connected with described voltage doubling rectifing circuit, for feeding back the current signal of described voltage doubling rectifing circuit and sending to described control circuit;
Described control circuit is connected with described PWM generator with described current feedback circuit, for controlling the duty ratio of the PWM ripple that described PWM generator exports according to the current signal of described current feedback circuit.
2. the DC high-voltage power supply of flocking machine according to claim 1, is characterized in that: described electromagnetic interface filter adopts two-layer configuration.
3. the DC high-voltage power supply of flocking machine according to claim 1, is characterized in that: described inverter circuit is half-bridge converter.
4. the DC high-voltage power supply of flocking machine according to claim 1, is characterized in that: described voltage doubling rectifing circuit is four voltage doubling rectifing circuits.
5. the DC high-voltage power supply of flocking machine according to claim 1, is characterized in that: the SG3525 chip that described PWM generator adopts American Silicon General Corporation to produce.
6. the DC high-voltage power supply of flocking machine according to claim 1, is characterized in that: described control circuit adopts IR2110 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410609770.6A CN104377962A (en) | 2014-11-03 | 2014-11-03 | Direct-current and high-voltage power supply of flocking machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410609770.6A CN104377962A (en) | 2014-11-03 | 2014-11-03 | Direct-current and high-voltage power supply of flocking machine |
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| Publication Number | Publication Date |
|---|---|
| CN104377962A true CN104377962A (en) | 2015-02-25 |
Family
ID=52556676
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410609770.6A Pending CN104377962A (en) | 2014-11-03 | 2014-11-03 | Direct-current and high-voltage power supply of flocking machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105119494A (en) * | 2015-09-09 | 2015-12-02 | 广东康氏实业有限公司 | Laser generator high-voltage direct-current voltage-stabilized power source circuit of laser computer embroidery machine |
| CN108365762A (en) * | 2018-01-30 | 2018-08-03 | 安徽省金屹电源科技有限公司 | A kind of use in washing machine sterilizer power source special |
| CN108616222A (en) * | 2018-07-10 | 2018-10-02 | 南京工业大学 | A kind of multi gear for clarifying smoke exports high voltage power supply |
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| CN108616222A (en) * | 2018-07-10 | 2018-10-02 | 南京工业大学 | A kind of multi gear for clarifying smoke exports high voltage power supply |
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Application publication date: 20150225 |