CN114666935A - Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp - Google Patents

Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp Download PDF

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Publication number
CN114666935A
CN114666935A CN202210200774.3A CN202210200774A CN114666935A CN 114666935 A CN114666935 A CN 114666935A CN 202210200774 A CN202210200774 A CN 202210200774A CN 114666935 A CN114666935 A CN 114666935A
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diode
power switch
anode
cathode
capacitor
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CN202210200774.3A
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Inventor
余亚东
李�杰
薛亚许
尹凯阳
雷宗昌
唐雄民
陈伟正
邹翀
郑长兵
周瑞敏
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Pingdingshan University
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Pingdingshan University
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies

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Abstract

The invention discloses a bipolar pulse current type driving circuit and equipment of a dielectric barrier discharge lamp. The invention discloses a bipolar pulse current type driving circuit which comprises a bipolar square wave voltage power supply loop, a flyback control loop, at least more than one flyback synchronous rectification loop and a dielectric barrier discharge lamp. The circuit topology disclosed by the invention not only has the advantage of high energy conversion efficiency, but also can realize smooth regulation of the discharge power injected into the dielectric barrier discharge lamp.

Description

Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp
Technical Field
The invention relates to the field of special power supplies of power electronics, in particular to a bipolar pulse current type driving circuit and equipment of a dielectric barrier discharge lamp.
Background
Dielectric Barrier Discharge (DBD), also called silent Discharge, is a gas Discharge in which an insulating substance is inserted into a Discharge space. When a sufficiently high excitation voltage is applied across the discharge electrodes, the gas between the electrodes is broken down to cause a microdischarge to occur in the microdischarge channels. This discharge structure enables the DBD to generate a discharge phenomenon in a wide range of an excitation voltage frequency and a gas pressure. Atmospheric Pressure Dielectric Barrier Discharge (APDBD) is a typical Atmospheric Pressure low temperature plasma generation mode. Because the APDBD device can generate a large amount of active particles under the condition of approaching room temperature and does not need expensive and slow-operating vacuumizing equipment. Therefore, in recent years, the development of APDBD has been rapidly advanced in the fields of biomedicine, material surface modification, volatile organic gases (VOCs) treatment, ozone synthesis, and the like.
When the structural parameters of the APDBD are determined and the external environment is stable, the type of the driving circuit and its parameters become key factors affecting the performance of the APDBD. The driving circuits commonly used at present mainly include a sine type driving circuit and a pulse type driving circuit. A plurality of experimental results show that the APDBD can show more excellent performance under the action of a pulse type driving circuit than under the action of a sine type driving circuit. Although the pulse voltage type driving circuit has the advantage of realizing convenience, as a typical capacitive load, when the pulse voltage type excitation is directly applied to the APDBD, at least two defects exist: 1) the APDBD can generate an uncontrolled current spike (the size of the spike is related to the load equivalent current and the applied voltage rise rate), which causes the protection circuit to act if the current spike is light, and causes the circuit to be damaged if the current spike is heavy; 2) it is difficult to effectively control the injection current that is closely related to the target product of the APDBD (e.g., ozone production in an ozone generator, uv flux of a dbd lamp).
Therefore, the invention provides a bipolar pulse current type driving circuit and equipment of a dielectric barrier discharge lamp, wherein the circuit has high energy conversion efficiency, effectively reduces the voltage value borne by a secondary circuit element of a transformer, and can also carry out effective smooth control on the current injected into the dielectric barrier discharge lamp.
Disclosure of Invention
The invention aims to disclose a bipolar pulse current type driving circuit and equipment of a dielectric barrier discharge lamp on the basis of considering the problems. The circuit disclosed by the invention has high energy conversion efficiency, effectively reduces the voltage value borne by the secondary circuit element of the transformer, and can also carry out effective smooth control on the current injected into the dielectric barrier discharge lamp so as to realize the optimal regulation on the ultraviolet luminous flux of the dielectric barrier discharge lamp.
The purpose of the invention is realized by the following technical scheme:
a bipolar pulse current type driving circuit of a dielectric barrier discharge lamp is characterized by comprising a bipolar square wave voltage power supply loop, a flyback control loop, at least one flyback synchronous rectification loop and the dielectric barrier discharge lamp.
Optionally, the bipolar square-wave voltage power supply loop is composed of a direct-current voltage source DC, a first capacitor C1, a first power switch tube Q1, a second power switch tube Q2, a third power switch tube Q3, and a fourth power switch tube Q4. The positive electrode of the direct-current voltage source DC is connected with the positive electrode of the first capacitor C1, the negative electrode of the first capacitor C1 is connected with the negative electrode of the direct-current voltage source DC, the drain electrode of the first power switch tube Q1 is connected with the positive electrode of the first capacitor C1, the source electrode of the first power switch tube Q1 is connected with the drain electrode of the second power switch tube Q2, the source electrode of the second power switch tube Q2 is connected with the negative electrode of the first capacitor C1, the drain electrode of the third power switch tube Q3 is connected with the drain electrode of the first power switch tube Q1, the source electrode of the third power switch tube Q3 is connected with the drain electrode of the fourth power switch tube Q4, and the source electrode of the fourth power switch tube Q4 is connected with the negative electrode of the first capacitor C1.
Optionally, a flyback control loopBy primary winding T of flyback transformer TpThe power amplifier comprises a fifth power switch tube Q5, a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. Wherein, the primary winding T of the flyback transformer TpThe same name terminal of the flyback transformer is connected with the source electrode of the first power switch tube Q1, and the primary winding T of the flyback transformer TpIs connected to the anode of a second diode D2, the cathode of a second diode D2 is connected to the cathode of a first diode D1, the anode of the first diode D1 is connected to the source of a third power switch Q3, the cathode of a fourth diode D4 is connected to the anode of the second diode D2, the anode of a fourth diode D4 is connected to the anode of a third diode D3, the cathode of the third diode D3 is connected to the source of the third power switch Q3, the drain of a fifth power switch Q5 is connected to the cathode of a first diode D1, and the source of the fifth power switch Q5 is connected to the anode of a third diode D3.
Optionally, the flyback synchronous rectification loop is formed by a secondary winding T of a flyback transformer Ts1And Ts2Sixth power switch Q6, fifth diode D5, sixth diode D6, seventh diode D7, eighth diode D8, second capacitor C2, seventh power switch Q7, ninth diode D9, twelfth diode D10, eleventh diode D11, twelfth diode D12, and third capacitor C3. Wherein, the secondary winding T of the flyback transformer Ts1Is connected to the anode of a fifth diode D5, the cathode of a fifth diode D5 is connected to the cathode of a sixth diode D6, the anode of a sixth diode D6 is connected to the cathode of an eighth diode D8, the anode of an eighth diode D8 is connected to the anode of a seventh diode D7, the cathode of a seventh diode D7 is connected to the secondary winding T of the flyback transformer Ts1The drain of the sixth power switch Q6 is connected to the cathode of the fifth diode D5, the source of the sixth power switch Q6 is connected to the anode of the seventh diode D4, the anode of the second capacitor C2 is connected to the anode of the sixth diode D6, the cathode of the second capacitor C2 is connected to the secondary winding T of the flyback transformer Ts1Is connected with the same name terminal, and the secondary winding T of the flyback transformer Ts2Is connected to the anode of a ninth diode D9The cathode of the nine diode D9 is connected to the cathode of the twelfth diode D10, the anode of the twelfth diode D10 is connected to the cathode of the twelfth diode D12, the anode of the twelfth diode D12 is connected to the anode of the eleventh diode D11, and the cathode of the eleventh diode D11 is connected to the secondary winding T of the flyback transformer Ts2The drain of the seventh power switch Q7 is connected to the cathode of the ninth diode D9, the source of the seventh power switch Q7 is connected to the anode of the eleventh diode D11, the anode of the third capacitor C3 is connected to the anode of the twelfth diode D10, the cathode of the third capacitor C3 is connected to the secondary winding T of the flyback transformer Ts2Are connected to the same name terminal.
Optionally, the anode of the dielectric barrier discharge lamp is connected to the anode of the second capacitor C2, and the cathode of the dielectric barrier discharge lamp is connected to the cathode of the third capacitor C3.
Optionally, an effective value of the DC voltage source DC may be adjusted according to practical applications, a capacitance value of the first capacitor C1 is sufficiently large, parameters of the first power switch Q1, the second power switch Q2, the third power switch Q3, and the fourth power switch Q4 are consistent, the first power switch Q1 and the fourth power switch Q4 are controlled by a drive Pulse1 with the same duty cycle of fifty percent, the second power switch Q2 and the third power switch Q3 are controlled by a drive Pulse2 with the same duty cycle of fifty percent, and the drive Pulse1 lags behind or leads the drive Pulse2 by a half cycle.
Optionally, the parameters of the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 are the same, the fifth power switch is controlled by a driving Pulse3 with the same duty ratio being lower than twenty-five percent, and the frequency value of the driving Pulse3 is twice as high as that of the driving Pulse1 and the driving Pulse 2.
Optionally, the parameters of the fifth diode D5, the sixth diode D6, the seventh diode D7, the eighth diode D8, the ninth diode D9, the twelfth diode D10, the eleventh diode D11 and the twelfth diode D12 are the same, the parameters of the sixth power switch Q6 and the seventh power switch Q7 are the same, the parameters of the second capacitor C2 and the third capacitor C3 are the same, the sixth power switch Q6 and the seventh power switch Q7 are controlled by the driving Pulse4, the driving Pulse4 is triggered when the driving Pulse3 is turned off, and the current flowing through the sixth power switch Q6 and the seventh power switch Q7 is turned off when zero.
Optionally, more than one flyback synchronous rectification loop may be connected in parallel according to the breakdown voltage of the dbd-lamp, so as to reduce the voltage tolerance of each path of the device.
Optionally, a bipolar pulse current type driving apparatus of a dbd-lamp is characterized by comprising a processor and a memory;
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is used for generating pulse signals of the rate switching tubes Q1-Q7 according to instructions in the program codes.
Compared with the prior art, the invention has the advantages that:
(1) by smoothly controlling the current injected into the dielectric barrier discharge lamp, the problem of uncontrollable current peak which is inevitably generated in the dielectric barrier discharge lamp in the existing circuit structure is solved;
(2) the bidirectional flow of energy can be realized, and the efficient transfer of energy can be realized;
(3) the voltage bearing value of the secondary side circuit element of the transformer is effectively reduced by utilizing the parallel structure of the multiple flyback synchronous rectification loops.
Drawings
Fig. 1 is a circuit structure diagram disclosed in the present invention.
Fig. 2 is a simple equivalent electrical model diagram of the dbd-lamp.
Fig. 3 is an equivalent electrical model diagram of the dbd-lamp without discharge.
Fig. 4 is an equivalent electrical model diagram of the dbd-lamp during discharging.
Fig. 5 is a graph of bipolar square wave supply voltage waveforms, a timing diagram of the drive pulses for the fifth power switch Q5 and the sixth (seventh) power switch Q6(Q7), and a graph of the current through the dbd lamp and the voltage waveforms applied to the lamp.
Detailed Description
The specific implementation steps of the circuit element parameter determination and the circuit control are as follows, wherein the circuit element numbers refer to fig. 1 and fig. 2:
1. off-line measurement of dielectric capacitance C of dielectric barrier discharge lamp when not dischargingdAir gap equivalent capacitance CgAnd a discharge sustaining voltage V of the dielectric barrier discharge lampth；
2. According to the dielectric capacitance CdAir gap equivalent capacitance CgDetermines the values of the second capacitance C2 and the third capacitance C3;
3. according to the discharge maintaining voltage V of dielectric barrier discharge lampthDetermining the number of flyback synchronous rectification loops on the secondary side of the transformer and the turn ratio N of the primary coil and the secondary coil;
4. and determining the voltage value of the direct-current voltage source DC according to the turn ratio N of the main coil and the auxiliary coil and determining the value of the first capacitor C1 according to the voltage stabilization condition.
5. The first power switch tube Q1 and the fourth power switch tube Q4 are controlled by a drive Pulse1 with the same duty cycle of fifty percent, the second power switch tube Q2 and the third power switch tube Q3 are controlled by a drive Pulse2 with the same duty cycle of fifty percent, and the drive Pulse1 lags behind or leads the drive Pulse2 by a half period.
6. The fifth power switch tube is controlled by a driving Pulse3 with the same duty ratio being lower than twenty-five percent, and the frequency value of the driving Pulse3 is twice that of the driving Pulse1 and the driving Pulse 2. The sixth power switch Q6 and the seventh power switch Q7 are controlled by a driving Pulse4, the driving Pulse4 is triggered when the driving Pulse3 is turned off, and the current flowing through the sixth power switch Q6 and the seventh power switch Q7 is turned off when the current is zero.
According to the above design principle, a set of circuit typical parameters is given below:
direct-current voltage DC: 435V;
capacitance C1: 80 muF;
capacitance C2: 80 pF;
capacitance C3: 80 pF;
a transformer T: rated frequency 100kHz, primary winding TpRated voltage 435V, secondary winding Ts1Rated voltage 2610V, secondary winding Ts2Rated voltage 2610V, transformer turn ratio N ═ Tp:Ts1:Ts2＝1:6:6；
Drive Pulse 1: frequency 50kHz, duty cycle 50%;
drive Pulse 2: frequency 50kHz, duty cycle 50%, lagging Pulse1 half cycle;
drive Pulse 3: frequency 100kHz, duty cycle 10%;
drive Pulse 4: at a frequency of 100kHz, the Pulse4 is triggered when the Pulse3 is turned off, and is turned off when the currents flowing through the sixth power switch Q6 and the seventh power switch Q7 are zero.
The operating waveforms of the circuit under this set of parameters are shown in fig. 5.

Claims (10)

1. A bipolar pulse current type driving circuit of a dielectric barrier discharge lamp is characterized by comprising a bipolar square wave voltage power supply loop, a flyback control loop, at least one flyback synchronous rectification loop and the dielectric barrier discharge lamp.
2. The bipolar pulse current type driving circuit for dielectric barrier discharge lamp as claimed in claim 1, wherein said bipolar square wave voltage supply circuit comprises a DC voltage source DC, a first capacitor C1, a first power switch Q1, a second power switch Q2, a third power switch Q3 and a fourth power switch Q4. The positive electrode of the DC voltage source DC is connected to the positive electrode of the first capacitor C1, the negative electrode of the first capacitor C1 is connected to the negative electrode of the DC voltage source DC, the drain of the first power switch Q1 is connected to the positive electrode of the first capacitor C1, the source of the first power switch Q1 is connected to the drain of the second power switch Q2, the source of the second power switch Q2 is connected to the negative electrode of the first capacitor C1, the drain of the third power switch Q3 is connected to the drain of the first power switch Q1, the source of the third power switch Q3 is connected to the drain of the fourth power switch Q4, and the source of the fourth power switch Q4 is connected to the negative electrode of the first capacitor C1.
3. The bipolar pulsed current type driving circuit for dielectric barrier discharge lamp as claimed in claim 1, wherein said flyback control loop is formed by a primary winding T of a flyback transformer TpThe power source comprises a fifth power switch tube Q5, a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. Wherein, the primary winding T of the flyback transformer TpThe same name end of the first power switch tube Q1 is connected with the source electrode of the first power switch tube Q1, and the primary winding T of the flyback transformer TpThe non-homonymous terminal of the second diode D2 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the cathode of the first diode D1, the anode of the first diode D1 is connected to the source of the third power switch Q3, the cathode of the fourth diode D4 is connected to the anode of the second diode D2, the anode of the fourth diode D4 is connected to the anode of the third diode D3, the cathode of the third diode D3 is connected to the source of the third power switch Q3, the drain of the fifth power switch Q5 is connected to the cathode of the first diode D1, and the source of the fifth power switch Q5 is connected to the anode of the third diode D3.
4. The bipolar pulse current type driving circuit for dielectric barrier discharge lamp as claimed in claim 1, wherein said flyback synchronous rectification circuit comprises a secondary winding T of a flyback transformer Ts1And Ts2Sixth power switch tube Q6, fifth diode D5, sixth diode D6, seventh diode D7, eighth diode D8, second capacitor C2, seventh power switch tube Q7, ninth diode D9, twelfth diode D10, eleventh diode D11, twelfth diode D12 and tenth diode D12Three capacitors C3. Wherein, the secondary winding T of the flyback transformer Ts1Is connected to the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to the cathode of the sixth diode D6, the anode of the sixth diode D6 is connected to the cathode of the eighth diode D8, the anode of the eighth diode D8 is connected to the anode of the seventh diode D7, the cathode of the seventh diode D7 is connected to the secondary winding T of the flyback transformer Ts1The drain of the sixth power switch Q6 is connected to the cathode of the fifth diode D5, the source of the sixth power switch Q6 is connected to the anode of the seventh diode D4, the anode of the second capacitor C2 is connected to the anode of the sixth diode D6, the cathode of the second capacitor C2 is connected to the secondary winding T of the flyback transformer Ts1The same name terminal of the flyback transformer T is connected with the secondary winding T of the flyback transformer Ts2Is connected to the anode of the ninth diode D9, the cathode of the ninth diode D9 is connected to the cathode of the twelfth diode D10, the anode of the twelfth diode D10 is connected to the cathode of the twelfth diode D12, the anode of the twelfth diode D12 is connected to the anode of the eleventh diode D11, the cathode of the eleventh diode D11 is connected to the secondary winding T of the flyback transformer Ts2The drain of the seventh power switch Q7 is connected to the cathode of the ninth diode D9, the source of the seventh power switch Q7 is connected to the anode of the eleventh diode D11, the anode of the third capacitor C3 is connected to the anode of the twelfth diode D10, the cathode of the third capacitor C3 is connected to the secondary winding T of the flyback transformer Ts2Are connected to the same name terminal.
5. A bipolar pulsed current type driving circuit for a dbd-lamp as claimed in claim 1 wherein the positive electrode of the dbd-lamp is connected to the anode of the second capacitor C2 and the negative electrode of the dbd-lamp is connected to the cathode of the third capacitor C3.
6. The bipolar square-wave voltage supply circuit according to claim 2, wherein an effective value of the DC voltage source DC is adjustable according to an actual application, a capacitance value of the first capacitor C1 is sufficiently large, parameters of the first power switch Q1, the second power switch Q2, the third power switch Q3 and the fourth power switch Q4 are consistent, the first power switch Q1 and the fourth power switch Q4 are controlled by a driving Pulse1 with a same duty ratio of fifty percent, the second power switch Q2 and the third power switch Q3 are controlled by a driving Pulse2 with a same duty ratio of fifty percent, and the driving Pulse1 lags behind or leads the driving Pulse2 by a half cycle.
7. The flyback control loop of claim 3 wherein the parameters of the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are the same, the fifth power switch is controlled by the same driving Pulse3 with a duty cycle less than twenty-five percent, and the frequency of the driving Pulse3 is twice the frequency of the driving Pulse1 and the driving Pulse 2.
8. The flyback synchronous rectification circuit as claimed in claim 4, wherein the fifth diode D5, the sixth diode D6, the seventh diode D7, the eighth diode D8, the ninth diode D9, the twelfth diode D10, the eleventh diode D11 and the twelfth diode D12 have the same parameters, the sixth power switch Q6 and the seventh power switch Q7 have the same parameters, the second capacitor C2 and the third capacitor C3 have the same parameters, the sixth power switch Q6 and the seventh power switch Q7 are controlled by a driving Pulse4, the driving Pulse4 is triggered when the driving Pulse3 is turned off, and the current flowing through the sixth power switch Q6 and the seventh power switch Q7 is zero.
9. The flyback synchronous rectification circuit of claim 4, wherein more than one flyback synchronous rectification circuit is connected in parallel according to the breakdown voltage of the DBD lamp, so as to reduce the voltage tolerance of each circuit.
10. A bipolar pulse current type driving device of a dielectric barrier discharge lamp is characterized by comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for generating pulse signals of the power switch tubes Q1-Q7 according to instructions in the program codes.
CN202210200774.3A 2022-03-03 2022-03-03 Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp Pending CN114666935A (en)

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CN202210200774.3A CN114666935A (en) 2022-03-03 2022-03-03 Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210200774.3A CN114666935A (en) 2022-03-03 2022-03-03 Bipolar pulse current type driving circuit and equipment of dielectric barrier discharge lamp

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CN114666935A true CN114666935A (en) 2022-06-24

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