CN104138805A - Electrostatic dust collection micropulse power supply - Google Patents
Electrostatic dust collection micropulse power supply Download PDFInfo
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- CN104138805A CN104138805A CN201410252092.2A CN201410252092A CN104138805A CN 104138805 A CN104138805 A CN 104138805A CN 201410252092 A CN201410252092 A CN 201410252092A CN 104138805 A CN104138805 A CN 104138805A
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- micropulse
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Abstract
The invention relates to an electrostatic dust collection micropulse power supply. The electrostatic dust collection micropulse power supply comprises a direct-current power supply, a high-frequency high-voltage pulse power supply, a coupling circuit and an electrostatic dust collection circuit, wherein the direct-current power supply, the high-frequency high-voltage pulse power supply and the coupling circuit are sequentially connected with one another to form a main loop, and the electrostatic dust collection circuit is connected with the direct-current power supply and the high-frequency high-voltage pulse power supply respectively. The electrostatic dust collection micropulse power supply has the beneficial effects that electrostatic dust collection is equivalent to a parallel circuit of a capacitor and a resistor, pulses with repeated frequency and microsecond grade pulse width are overlaid under high-voltage direct-current base voltage through coupling of an inductor and the capacitor, a power electronic device is adopted to generate high-voltage pulses at two ends of an ESP after boosted by a pulse transformer according to the LC series resonance principle, and a controller acquires output voltage signals for analysis and further controls a high-voltage direct-current circuit.
Description
Technical field
The present invention relates to dedusting power source, relate in particular to a kind of electrostatic precipitation micropulse power.
Background technology
Along with social development and the mankind's progress, people require further to improve to ecological environment and air quality.Coal-burning power plant's dust emission standard value further drops to 30mg/ cubic meter even below 20mg/ cubic meter by 50mg/ cubic meter, and the discharge value of fine particle PM2.5 requires further to reduce.Current routine intravenous electric dust-removing power supply can not meet the need, and this electrostatic dust-removing micropulse power all has good dust removing effects to Nanoparticle and various senior middle schools low resistivity dust.
Summary of the invention
The object of the invention is to overcome the deficiency of above prior art, and a kind of electrostatic precipitation micropulse power is provided, and specifically has following technical scheme to realize:
Described electrostatic precipitation micropulse power, comprise dc source, high-frequency and high-voltage impulse power supply, coupling circuit and electrostatic precipitation circuit, described dc source, high-frequency and high-voltage impulse power supply and coupling circuit are in turn connected to form major loop, and described electrostatic precipitation circuit is connected with high-frequency and high-voltage impulse power supply with dc source respectively.
The further design of described electrostatic precipitation micropulse power is, described electrostatic precipitation circuit is by an electric capacity and resistance and connect and form.
The further design of described electrostatic precipitation micropulse power is, described coupling circuit is comprised of an inductance and capacitance series.
The further design of described electrostatic precipitation micropulse power is, described high-voltage pulse power source primary side is two winding parallels, secondary side is a winding, two windings of primary side connect an IGBT switch by a buffer circuit respectively, to allow the both end voltage of IGBT switch maintain in 500 volts at shutdown moment.
The further design of described electrostatic precipitation micropulse power is, the burning group of secondary side is connected with electric cleaner.
The further design of described electrostatic precipitation micropulse power is, between described each IGBT switch and corresponding burning group and between electric cleaner and corresponding burning group, is connected with respectively coupling capacitance.
The further design of described electrostatic precipitation micropulse power is, two burning groups of described primary side are connected with pulse power supply power supply by an inductance coil respectively, the burning group of described secondary side is connected with fundamental power supply by an inductance coil, to reduce the impact of high-voltage pulse to fundamental power supply and pulse power supply power supply.
The further design of described electrostatic precipitation micropulse power is, described buffer circuit comprises resistance, diode and electric capacity, and described diode and resistance also connect and described capacitance series again.
The further design of described electrostatic precipitation micropulse power is, the primary voltage of high-frequency and high-voltage impulse power supply is 2.5kV, and secondary voltage is 70kV, and voltage transmission is than K=28, pulse width T r=100us.
Advantage of the present invention is as follows:
Electrostatic precipitation micropulse power provided by the invention is to consist of dc source, high-frequency and high-voltage impulse power supply, coupling circuit and control circuit.Electrostatic precipitation is equivalent to the parallel circuit of an electric capacity and a resistance, by inductance and Capacitance Coupled, the pulse of repetition rate, the Microsecond grade pulsewidth of superposeing on HVDC basic voltage, according to LC series resonance principle, adopt power electronic devices, through pulse transformer transformer, boost, at ESP two ends, produce high-voltage pulse, controller is analyzed collection output voltage signal, and then hvdc circuit is controlled.
accompanying drawing explanation
Fig. 1 is the circuit diagram of electrostatic precipitation micropulse power provided by the invention.
Fig. 2 is the circuit diagram of high-frequency and high-voltage impulse power supply.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention program is elaborated.
The electrostatic precipitation micropulse power that the present embodiment provides, referring to Fig. 1, mainly by dc source, high-frequency and high-voltage impulse power supply, coupling circuit and electrostatic precipitation the electric circuit constitute.Dc source, high-frequency and high-voltage impulse power supply and coupling circuit are in turn connected to form major loop.Electrostatic precipitation circuit is connected with dc source, high-frequency and high-voltage impulse power supply respectively.Coupling circuit is connected with dc source, high-frequency and high-voltage impulse power supply respectively.High-frequency and high-voltage impulse power supply in the present embodiment is a high voltage pulse transformer.The primary voltage of high voltage pulse transformer PT is 2.5kV, secondary voltage is 70kV, voltage transmission compares K=28, pulse width T r=100us, resonance current is laterally zygomorphic sine wave, and pulse transformer number of turn design frequency is 10kHz, and pulse recurrence frequency should be able to be adjusted to 400Hz from 25Hz, therefore belong to medium-frequency pulse transformer, transformer core can be ultracrystallite material and the ultra-thin silicon steel of 0.2mm.Pulse Transformer Design is except meeting general design of transformer principle, also has leakage inductance value that the key factor that will consider is exactly primary coil will meet the requirement of resonant pulses width and resonance impedance.Primary voltage 2.5kV, secondary voltage 70kV pulse, and take insulation measures.Pulse current is very large, and pulse width is narrow, 100us, but repetition rate is not high, 25Hz～400Hz, the desirable 10A/mm2 of current density.
As Fig. 1, in the present embodiment, electrostatic precipitation circuit is by a capacitor C p and resistance R p and connect and form.Capacitor C p connects respectively dc source, high-frequency and high-voltage impulse power supply and ground, other end butt coupling circuit with corresponding one end of resistance R p.
In the present embodiment, coupling circuit is by an inductance L
dCwith capacitor C
dCcompose in series.
High-voltage pulse power source primary side is two winding parallels, and secondary side is a winding, referring to Fig. 2.In order to allow the electric current in pulse transformer leakage inductance have path, be provided with buffer circuit.Two windings of primary side connect an IGBT switch by a buffer circuit respectively, to allow the both end voltage of IGBT switch maintain in 500 volts at shutdown moment.The burning group of secondary side is connected with electric cleaner ESP.Buffer circuit is comprised of resistance, diode and electric capacity.Diode and resistance also connect and capacitance series again, as shown in Figure 2.Buffering clamped network Cd1, Dd1, Rd1 and Cd2, Dd2, Rd2 is that the safety of IGBT switch when solving impulse duration pulsing flashover arranges, its parameter can be definite by testing when impulse sparkover is tested.
Between each IGBT switch and corresponding burning group and between electric cleaner and corresponding burning group, be connected with respectively coupling capacitance, as shown in Figure 2, IGBT1 is connected with coupling capacitance Cs1, and IGBT2 is connected with coupling capacitance Cs2.
Further, two burning group N1, N2 of primary side are connected with pulse power supply power supply Vps by an inductance coil respectively, and as shown in Figure 2, N1 is connected with Vps by Lps1, and N2 is connected with Vps by Lps2.The burning group of secondary side is connected with fundamental power supply Vdc by an inductance coil, and N3 is connected with Vdc by Ldc.So, can reduce the impact of high-voltage pulse to fundamental power supply and pulse power supply power supply.Inductance coil Ldc and Lps1, Lps2 arranges the impact of fundamental power supply Udc and pulse power supply power supply Ups for reducing high-voltage pulse, therefore belongs to filter inductance, generally gets mH level.
Direct current basic voltage Udc adds to ESP by inductance L dc, for preventing adding coupling capacitance Cc. high-voltage pulse generator power supply Ups to be connected to IGBT switch and storage capacitor Cs by inductance L ps by pulse transformer PT secondary short circuited.Inductance L dc and Lps are in order to prevent that high-voltage pulse from directly affecting fundamental power supply Udc and impulse generator power supply Ups.Diode D is the fly-wheel diode that is positioned at IGBT switch inside.Ups dc source charges to Ups by inductance L ps and pulse transformer PT primary coil to storage capacitor Cs.When IGBT switch conduction, Cs and pulse transformer PT leakage inductance Ls, coupling capacitance Cc, ESP capacitor C f forms series current resonance, the electric current of a pulse and voltage waveform, electric current is to be the sine wave of T in the cycle, voltage is the cosine wave of secundly, be superimposed upon basic DC voltage Udc upper, form negative high pulse voltage Udc+Vpulse and add to ESP.
When driving pulse adds to the control utmost point of IGBT switch, IGBT conducting, Cs is by PT leakage inductance Ls, the equivalent capacity electric discharge of Cf and Cc, the sine wave that produces positive direction, when t=T/2, resonance current is O, reverse with after-current, by the sustained diode of IGBT, feedback energy is to Cs reverse charging, during t=T, the lower half that completes sine-wave current, electric current makes zero again.Pulsewidth is T, and amplitude is Udc+Vpulse; Therefore the cosine wave pulse voltage of secundly forms.
Claims (9)
1. an electrostatic precipitation micropulse power, it is characterized in that comprising dc source, high-frequency and high-voltage impulse power supply, coupling circuit and electrostatic precipitation circuit, described dc source, high-frequency and high-voltage impulse power supply and coupling circuit are in turn connected to form major loop, and described electrostatic precipitation circuit is connected with high-frequency and high-voltage impulse power supply with dc source respectively.
2. electrostatic precipitation micropulse power according to claim 1, is characterized in that described electrostatic precipitation circuit by an electric capacity and resistance and connects forming.
3. electrostatic precipitation micropulse power according to claim 1, is characterized in that described coupling circuit is comprised of an inductance and capacitance series.
4. electrostatic precipitation micropulse power according to claim 1, it is characterized in that described high-voltage pulse power source primary side is two winding parallels, secondary side is a winding, two windings of primary side connect an IGBT switch by a buffer circuit respectively, to allow the both end voltage of IGBT switch maintain in 500 volts at shutdown moment.
5. electrostatic precipitation micropulse power according to claim 1, is characterized in that the burning group of secondary side is connected with electric cleaner.
6. electrostatic precipitation micropulse power according to claim 1, it is characterized in that between described each IGBT switch and corresponding burning group and electric cleaner and corresponding burning group between be connected with respectively coupling capacitance.
7. electrostatic precipitation micropulse power according to claim 4, two burning groups that it is characterized in that described primary side are connected with pulse power supply power supply by an inductance coil respectively, the burning group of described secondary side is connected with fundamental power supply by an inductance coil, to reduce the impact of high-voltage pulse to fundamental power supply and pulse power supply power supply.
8. electrostatic precipitation micropulse power according to claim 1, is characterized in that described buffer circuit comprises resistance, diode and electric capacity, and described diode and resistance also connect and described capacitance series again.
9. electrostatic precipitation micropulse power according to claim 1, the primary voltage that it is characterized in that high-frequency and high-voltage impulse power supply is 2.5kV, and secondary voltage is 70kV, and voltage transmission is than K=28, pulse width T r=100us.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410252092.2A CN104138805A (en) | 2014-06-10 | 2014-06-10 | Electrostatic dust collection micropulse power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410252092.2A CN104138805A (en) | 2014-06-10 | 2014-06-10 | Electrostatic dust collection micropulse power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109153024A (en) * | 2016-06-06 | 2019-01-04 | 松下知识产权经营株式会社 | Charge device, electrostatic (electric dust) precipitator, air interchanger and air purifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326860A (en) * | 1980-11-28 | 1982-04-27 | Nwl Transformers | Ripple insensitive electric precipitator |
| CN102497113A (en) * | 2011-11-14 | 2012-06-13 | 江苏科技大学 | High-frequency high-voltage power supply for electrostatic precipitation, and control method of the same |
| CN202479047U (en) * | 2011-06-17 | 2012-10-10 | 浙江工商大学 | Pulse power supply unit for electric dust remover |
| CN103350031A (en) * | 2013-06-09 | 2013-10-16 | 浙江菲达环保科技股份有限公司 | Pulse power supply used in electric precipitation |
-
2014
- 2014-06-10 CN CN201410252092.2A patent/CN104138805A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326860A (en) * | 1980-11-28 | 1982-04-27 | Nwl Transformers | Ripple insensitive electric precipitator |
| CN202479047U (en) * | 2011-06-17 | 2012-10-10 | 浙江工商大学 | Pulse power supply unit for electric dust remover |
| CN102497113A (en) * | 2011-11-14 | 2012-06-13 | 江苏科技大学 | High-frequency high-voltage power supply for electrostatic precipitation, and control method of the same |
| CN103350031A (en) * | 2013-06-09 | 2013-10-16 | 浙江菲达环保科技股份有限公司 | Pulse power supply used in electric precipitation |
Non-Patent Citations (1)
| Title |
|---|
| 王为学 等: "《电除尘器自动控制装置》", 31 March 1988, article "高压脉冲电源", pages: 211-214 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109153024A (en) * | 2016-06-06 | 2019-01-04 | 松下知识产权经营株式会社 | Charge device, electrostatic (electric dust) precipitator, air interchanger and air purifier |
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