CN105024585A - Serial-type pulse voltage generating device and method - Google Patents
Serial-type pulse voltage generating device and method Download PDFInfo
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- CN105024585A CN105024585A CN201510473694.5A CN201510473694A CN105024585A CN 105024585 A CN105024585 A CN 105024585A CN 201510473694 A CN201510473694 A CN 201510473694A CN 105024585 A CN105024585 A CN 105024585A
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Abstract
The invention discloses a serial-type pulse voltage generating device and method. According to the device, output positive electrodes and output negative electrodes of a plurality of basic resonant units are sequentially connected in series, wherein the positive electrodes and the negative electrodes which are connected in series are connected to the primary side of a high-frequency boosting transformer; the secondary side of the high-frequency boosting transformer is connected to a capacitive electric field load; the input ends of the basic resonant units is a three-phase rectifier bridge; the output positive electrode of the rectifier bridge is connected to the collector of a charging IGBT (Insulated Gate Bipolar Translators); the emitter of the charging IGBT is connected to one end of a current-limiting inductor; the other end of the current-limiting inductor is connected to the positive electrode of an energy storage capacitor; the negative electrode of the energy storage capacitor is connected to the negative electrode of the rectifier bridge; the cathode of a freewheeling diode is connected to the emitter of the charging IGBT; the anode of the diode is connected to the negative electrode of the energy storage capacitor; and the collector of a resonant IGBT is connected to the positive electrode of the energy storage capacitor. High output pulse voltage is obtained through serial connection of the plurality of basic resonant units, and isolation and boosting can be realized without any industrial frequency transformer.
Description
Technical field
The present invention relates to a kind of tandem pulse voltage generating means, belong to electric and electronic technical field.
Background technology
Because the electric power of China more than 60% is provided by coal-burning thermal power plant, along with the development of national economy, also bring the atmospheric dust pollution problem be on the rise while energy output sustainable growth, impel China to widely popularize electrostatic precipitator technology nearly ten years.Static dust-removing power successively experienced by the developing stage of power frequency supply, high frequency electric source, industry proposes a kind of technology superposing intermittent impulse voltage on direct voltage basis in recent years, dust charge power can be strengthened and promote dust removing effects, effectively overcome high resistivity dust back corona phenomenon in the electric field, and reduce power supply energy consumption.The formation of this pulse voltage needs the capacity effect utilizing electric field load usually, forms a resonant tank by storage capacitor, electric field load capacitance, high-frequency step-up transformer leakage inductance, is realized by the resonance current very short to the load capacitance injection cycle.The energy of resonator system is provided by storage capacitor.In order to reach good dust removing effects, usually voltage pulse output peak value is needed to reach more than 120kV, in order to avoid causing electric field flashover, usually need the width of control impuls voltage within 100 μ s, this means that the peak value of resonance current is higher, also namely require that the initial DC voltage of storage capacitor is higher.Therefore after the rectification of the pulse power many uses Industrial Frequency Transformer boosting at present, storage capacitor is charged, and in order to reduce the withstand voltage of electric capacity and IGBT, mostly have employed the scheme of many branch road series connection, this provides the rectification circuit of multiple vice-side winding to storage capacitor to isolate with regard to needing multiple independently transformer or a transformer.The use of this isolation boosting transformer adds volume and the cost of equipment.
Summary of the invention
The invention provides a kind of Industrial Frequency Transformer that do not need and carry out the pulse voltage generating means of isolating and boosting.
Another object of the present invention is to provide a kind of method producing continuous impulse.
For realizing this target, the present invention adopts following technical scheme:
A kind of tandem pulse voltage generating means, connected successively by the output cathode of several fundamental resonance unit and output negative pole, positive pole after series connection and negative pole access the former limit of high-frequency step-up transformer respectively, the secondary of high-frequency step-up transformer is connected to the load of capacitive electric field, described fundamental resonance unit comprises three-phase commutation bridge, charging IGBT, resonance IGBT, fly-wheel diode, current-limiting inductance and storage capacitor, this device input is three-phase commutation bridge, three-phase commutation bridge output cathode is connected to the collector electrode of charging IGBT, the emitter of charging IGBT is connected to one end of current-limiting inductance, the other end of current-limiting inductance is connected to the positive pole of storage capacitor, the negative pole of storage capacitor is connected to the negative pole of rectifier bridge, the negative electrode of described fly-wheel diode is connected to the emitter of charging IGBT, the anode of diode is connected to the negative pole of storage capacitor, the collector electrode of described resonance IGBT is connected to the positive pole of storage capacitor, the emitter of resonance IGBT and the negative pole of storage capacitor are respectively as the output cathode of fundamental resonance unit and output negative pole.
Described fundamental resonance unit comprises three groups.
The ceiling voltage of fundamental resonance unit storage capacitor is the crest voltage of grid line voltage, and the mode that multiple fundamental resonance unit output stage can be adopted to connect obtains higher initial voltage, and then makes load obtain higher pulse voltage.
Said apparatus produces the method for continuous impulse, and the method comprises the following steps:
1) IGBT that charges is open-minded, and resonance IGBT turns off, and electric current flows into storage capacitor by three-phase commutation bridge output cathode through current-limiting inductance, and storage capacitor is in charged state;
2) IGBT that charges turns off, and resonance IGBT turns off, and electric current flows through the loop be made up of current-limiting inductance, storage capacitor and fly-wheel diode; If current limliting inductive current is non-vanishing when charging IGBT turns off, then the magnetic field energy that current-limiting inductance stores is released into storage capacitor, and storage capacitor is in charged state;
3) IGBT that charges turns off, and resonance IGBT is open-minded, forms resonant circuit by storage capacitor, step-up transformer leakage inductance, load electric field equivalent capacity; Charged state after the first electric discharge of storage capacitor experience; But because of load equivalent resistance and the certain energy of loop equivalent resistance consumption, at the end of resonant process, the voltage of storage capacitor is by the initial voltage before starting lower than resonance, needs by electrical network electric energy supplement;
4) repeat step 1-step 3 and can produce continuous print pulse voltage.
Further design of the present invention is:
In the method, described charging IGBT and resonance IGBT is alternately open-minded, can turn off simultaneously, but can not be simultaneously open-minded.And in order to ensure the stability of circuit, resonance IGBT close have no progeny should leave certain Dead Time open again charging IGBT.
In the method, described resonance IGBT each service time is greater than 0.5 times of system resonance cycle, be less than the system resonance cycle, and its switching frequency is adjustable.
Charging IGBT each service time described in the method is less than turn-off time of resonance IGBT.By regulate charging IGBT service time adjustable storage capacitor voltage.
Fundamental resonance unit described in the method can carry out multiple series connection, obtains higher pulse voltage, the charging IGBT synchronous working of all fundamental resonance unit, the resonance IGBT synchronous working of all fundamental resonance unit.
The present invention compared to existing technology tool has the following advantages:
The present invention can obtain higher initial voltage by the series connection of multiple fundamental resonance unit, and then can obtain higher voltage pulse output; Achieved the isolation of charge circuit and resonant tank by the switch control rule of energy storage IGBT, and different resonance initial voltages can be obtained, thus do not need power frequency isolation boosting transformer.
The initial voltage of the present invention by regulating the service time of charging IGBT can regulate storage capacitor, and then the peak value of adjustable voltage pulse output, to adapt to different loading demands.
The charging IGBT used and current-limiting inductance technical requirement are all not high, low price.The present invention can reduce the volume of pulse generation power supply, saves cost.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of fundamental resonance unit of the present invention.
Fig. 2 is the preferred example circuit schematic diagram of the present invention.
Fig. 3 is that the IGBT that charges in patent embodiment of the present invention is open-minded, equivalent circuit diagram when resonance IGBT turns off.
Fig. 4 is IGBT shutoff of charging in patent embodiment of the present invention, equivalent circuit diagram when resonance IGBT turns off.
Fig. 5 is IGBT shutoff of charging in patent embodiment of the present invention, equivalent circuit diagram when resonance IGBT opens.
The implication marked in Fig. 1: 1. three-phase commutation bridge, 2. charge IGBT, 3. resonance IGBT, 4. fly-wheel diode, 5. current-limiting inductance, 6. storage capacitor, 7. output head anode, 8. negative pole of output end, 9. input.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
Embodiment one:
In the present invention, each fundamental resonance element circuit structure as shown in Figure 1, the input side of three-phase commutation bridge (1) connects three-phase 380V low-voltage network, outlet side positive pole is connected with the collector electrode of charging IGBT (2), the emitter of charging IGBT (2) is connected with one end of current-limiting inductance (5), the other end of current-limiting inductance (5) is connected with the positive pole of storage capacitor (6), the negative pole of storage capacitor (6) is connected to the negative pole of three-phase commutation bridge (1), the collector electrode of resonance IGBT (3) is connected to the positive pole of storage capacitor (6).The emitter of resonance IGBT (3) and the negative pole of storage capacitor (6) are respectively as the output cathode of fundamental resonance unit and negative pole.Simultaneously, in order to the magnetic field energy release stored in current-limiting inductance (5) when preventing from charging IGBT (2) shutoff causes charging IGBT (2) overvoltage, inverse parallel fly-wheel diode (4) between the emitter and the negative pole of storage capacitor (6) of charging IGBT (2), so can by the fault offset in current-limiting inductance (5) in storage capacitor (6).
Embodiment two:
Fig. 2 connects through step-up transformer the pulse voltage generation systems that electric field load forms by after three fundamental resonance units in series.The output both positive and negative polarity of the first resonant element, the second resonant element and the 3rd resonant element is connected successively, the output cathode of headend unit and the output negative pole of terminal units and a step-up transformer T after series connection
1former limit be connected, the secondary of step-up transformer is connected to electric field load (C
land R
lthe equivalent electric circuit formed in parallel).In three unit, the input side of three-phase commutation bridge is mutually connected and connects power distribution network.
The pulse generating system course of work shown in Fig. 2 can be divided into charging process and two stages of resonant process, specifically through following steps:
Step (1), the charging IGBT (Q of three fundamental resonance unit
4, Q
5, Q
6) simultaneously open-minded, resonance IGBT (Q
1, Q
2, Q
3) remaining off state, then circuit system is reduced to shown in figure (3).Three phase network ac voltage rectifier to become after direct voltage through current-limiting inductance to storage capacitor (Cr by rectifier bridge
1, Cr
2, Cr
3) charging.By controlling the service time of charging IGBT, can regulate the voltage of storage capacitor, theoretical ceiling voltage is the peak value of three-phase alternating current line voltage.The longest charging interval can be determined by formula (1):
T
charge_max=T
switch-T
rformula (1)
Wherein: T
charge_maxfor the maximum charge time;
T
switchfor pulse voltage gap periods;
T
rfor the system resonance cycle.
Usually closed-loop control is adopted to the control of storage capacitor voltage, the charging interval of the IGBT that can obtain after the actual value of tank voltage and the difference of set point input pi regulator charging, can as the saturation value of pi regulator.
Step (2), the charging IGBT (Q of three fundamental resonance unit
4, Q
5, Q
6) turn off, charging IGBT (Q simultaneously
1, Q
2, Q
3) still remain off state, according to load power consumption, line transmission power consumption, current-limiting inductance inductance value and the difference of charging IGBT service time, current-limiting inductance (L
1, L
2, L
3) when the IGBT that charges turns off, electric current may be non-vanishing, then now circuit system is reduced to shown in figure (4).Current-limiting inductance electric current will through fly-wheel diode (D
1, D
2, D
3) be released in storage capacitor.If current limliting inductive current is zero when charging IGBT turns off, then the IGBT that charges is zero-current switching, and freewheeling circuit does not work.
Step (3), the charging IGBT (Q of three fundamental resonance unit
4, Q
5, Q
6) keep turning off, charging IGBT (Q
1, Q
2, Q
3) simultaneously open-minded, then circuit system is reduced to shown in figure (5).Storage capacitor (Cr
1, Cr
2, Cr
3), transformer T1 leakage inductance and electric field load capacitance by formation one resonator system, its initial voltage is the voltage sum of storage capacitor.The crest voltage of load capacitance can be determined by formula (2):
Wherein: V
peakfor load capacitance C
lcrest voltage;
V
0for the initial voltage sum of storage capacitor;
C
eqfor the equivalent capacity that circuit after conversion to transformer primary side is total;
N is step-up transformer no-load voltage ratio;
C
lfor load electric field equivalent capacity.
The harmonic period of system is determined by formula (3):
Wherein: T
rfor the system resonance cycle;
L
rfor transformer leakage inductance;
C
eqfor the equivalent capacity that circuit after conversion to transformer primary side is total;
The service time of resonance IGBT is less than the harmonic period of system, ensures that every subsystem only produces a resonance.Resonance IGBT after resonance current zero passage, can turn off when namely resonance current flows through its anti-paralleled diode, and the turn-off power loss of such resonance IGBT is zero.
Repeat step (1) ~ step (3) and continuous print pulse voltage can be produced in load electric field.
According to the Output Voltage Formula described by formula (2), if desired boosted output voltages, then can improve V
0value, more fundamental resonance unit of namely can connecting, is realized by the initial voltage of cumulative more storage capacitors.
Above-described embodiment does not limit the present invention in any form, and all employings are equal to replacement or the technical scheme that obtains of equivalent transformation, all drop in protection scope of the present invention.
Claims (7)
1. tandem pulse voltage generating means, connected successively by the output cathode of several fundamental resonance unit and output negative pole, positive pole after series connection and negative pole access the former limit of high-frequency step-up transformer respectively, the secondary of high-frequency step-up transformer is connected to the load of capacitive electric field, it is characterized in that: described fundamental resonance unit comprises three-phase commutation bridge, charging IGBT, resonance IGBT, fly-wheel diode, current-limiting inductance and storage capacitor, this device input is three-phase commutation bridge, three-phase commutation bridge output cathode is connected to the collector electrode of charging IGBT, the emitter of charging IGBT is connected to one end of current-limiting inductance, the other end of current-limiting inductance is connected to the positive pole of storage capacitor, the negative pole of storage capacitor is connected to the negative pole of rectifier bridge, the negative electrode of described fly-wheel diode is connected to the emitter of charging IGBT, the anode of diode is connected to the negative pole of storage capacitor, the collector electrode of described resonance IGBT is connected to the positive pole of storage capacitor, the emitter of resonance IGBT and the negative pole of storage capacitor are respectively as the output cathode of fundamental resonance unit and output negative pole.
2. tandem pulse voltage generating means according to claim 1, is characterized in that: described fundamental resonance unit comprises three groups.
3. adopt device described in claim 1 or 2 to produce the method for continuous impulse, the method comprises the following steps:
1) IGBT that charges is open-minded, and resonance IGBT turns off, and electric current flows into storage capacitor by three-phase commutation bridge output cathode through current-limiting inductance, and storage capacitor is in charged state;
2) IGBT that charges turns off, and resonance IGBT turns off, and electric current flows through the loop be made up of current-limiting inductance, storage capacitor and fly-wheel diode; If current limliting inductive current is non-vanishing when charging IGBT turns off, the magnetic field energy that current-limiting inductance stores is released into storage capacitor, and storage capacitor is in charged state; If current limliting inductive current is zero when charging IGBT turns off, then do not have stored energy in inductance, storage capacitor keeps voltage constant;
3) IGBT that charges turns off, and resonance IGBT is open-minded, forms resonant circuit by storage capacitor, step-up transformer leakage inductance, load electric field equivalent capacity; Charged state after the first electric discharge of storage capacitor experience;
4) repeat step 1-step 3 and can produce continuous print pulse voltage.
4. produce the method for continuous impulse according to claim 3, in the method, when described fundamental resonance unit carries out multiple series connection, the charging IGBT synchronous working of all fundamental resonance unit, the resonance IGBT synchronous working of all fundamental resonance unit.
5. produce the method for continuous impulse according to claim 3, in the method, resonance IGBT closes and has no progeny and should leave Dead Time, then opens charging IGBT, and this Dead Time should be greater than the difference of system resonance cycle and resonance IGBT service time.
6. according to claim 3,4 or 5, produce the method for continuous impulse, in the method, described resonance IGBT each service time is greater than 0.5 times of system resonance cycle, is less than the system resonance cycle.
7. produce the method for continuous impulse according to claim 6, the charging IGBT each service time described in the method is less than turn-off time of resonance IGBT.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026755A (en) * | 2016-06-23 | 2016-10-12 | 东南大学 | Series type pulse generator applicable to pulse power supply |
| CN107081046A (en) * | 2017-06-23 | 2017-08-22 | 杭州天明环保工程有限公司 | A kind of pulse generating unit for gas cleaning |
| CN110289832A (en) * | 2019-06-28 | 2019-09-27 | 四川英杰电气股份有限公司 | A kind of solid-state modulator |
| CN111181532A (en) * | 2019-12-30 | 2020-05-19 | 河北建材职业技术学院 | Blocking type high-frequency pulse current generating circuit |
| WO2024087873A1 (en) * | 2022-10-28 | 2024-05-02 | 云南电网有限责任公司电力科学研究院 | Oscillation wave generation circuit and construction method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6066901A (en) * | 1998-09-17 | 2000-05-23 | First Point Scientific, Inc. | Modulator for generating high voltage pulses |
| CN101534071A (en) * | 2009-04-09 | 2009-09-16 | 复旦大学 | All solid state high voltage nanosecond pulse power supply |
| CN102388530A (en) * | 2008-10-01 | 2012-03-21 | 雷斯特克有限公司 | Circuit and method for coupling electrical energy to a resonated inductive load |
| CN102983753A (en) * | 2012-11-30 | 2013-03-20 | 刘明日 | High-voltage inverter with UPS (uninterrupted power supply) |
| CN103138675A (en) * | 2012-12-29 | 2013-06-05 | 辽宁荣信众腾科技有限公司 | High-voltage inverter sharing direct current (DC) bus |
| CN103618472A (en) * | 2013-09-12 | 2014-03-05 | 复旦大学 | Full-solid-state high-voltage pulse current source with unipolar pulse output |
| CN103944389A (en) * | 2014-04-04 | 2014-07-23 | 南京国电环保科技有限公司 | Novel resonant converter |
| CN104617808A (en) * | 2015-01-30 | 2015-05-13 | 重庆市计量质量检测研究院 | Novel adjustable polarity square wave high-voltage pulse power circuit and control strategy for generating double-polarity pulse |
-
2015
- 2015-08-05 CN CN201510473694.5A patent/CN105024585B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6066901A (en) * | 1998-09-17 | 2000-05-23 | First Point Scientific, Inc. | Modulator for generating high voltage pulses |
| CN102388530A (en) * | 2008-10-01 | 2012-03-21 | 雷斯特克有限公司 | Circuit and method for coupling electrical energy to a resonated inductive load |
| CN101534071A (en) * | 2009-04-09 | 2009-09-16 | 复旦大学 | All solid state high voltage nanosecond pulse power supply |
| CN102983753A (en) * | 2012-11-30 | 2013-03-20 | 刘明日 | High-voltage inverter with UPS (uninterrupted power supply) |
| CN103138675A (en) * | 2012-12-29 | 2013-06-05 | 辽宁荣信众腾科技有限公司 | High-voltage inverter sharing direct current (DC) bus |
| CN103618472A (en) * | 2013-09-12 | 2014-03-05 | 复旦大学 | Full-solid-state high-voltage pulse current source with unipolar pulse output |
| CN103944389A (en) * | 2014-04-04 | 2014-07-23 | 南京国电环保科技有限公司 | Novel resonant converter |
| CN104617808A (en) * | 2015-01-30 | 2015-05-13 | 重庆市计量质量检测研究院 | Novel adjustable polarity square wave high-voltage pulse power circuit and control strategy for generating double-polarity pulse |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026755A (en) * | 2016-06-23 | 2016-10-12 | 东南大学 | Series type pulse generator applicable to pulse power supply |
| WO2017219489A1 (en) * | 2016-06-23 | 2017-12-28 | 东南大学 | Series pulse generator applicable to pulse power supply |
| CN107081046A (en) * | 2017-06-23 | 2017-08-22 | 杭州天明环保工程有限公司 | A kind of pulse generating unit for gas cleaning |
| CN107081046B (en) * | 2017-06-23 | 2023-10-17 | 杭州天明环保工程有限公司 | Pulse generating device for purifying flue gas |
| CN110289832A (en) * | 2019-06-28 | 2019-09-27 | 四川英杰电气股份有限公司 | A kind of solid-state modulator |
| CN110289832B (en) * | 2019-06-28 | 2023-06-02 | 四川英杰电气股份有限公司 | Solid-state modulator |
| CN111181532A (en) * | 2019-12-30 | 2020-05-19 | 河北建材职业技术学院 | Blocking type high-frequency pulse current generating circuit |
| CN111181532B (en) * | 2019-12-30 | 2023-07-25 | 河北建材职业技术学院 | Blocking type high-frequency pulse current generation circuit |
| WO2024087873A1 (en) * | 2022-10-28 | 2024-05-02 | 云南电网有限责任公司电力科学研究院 | Oscillation wave generation circuit and construction method |
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