阅读说明：本技术 一种低电压、低功率和低电磁干扰的脉冲-交流组合式纳秒脉冲放电产生装置和产生方法 (Low-voltage, low-power and low-electromagnetic interference pulse-alternating current combined nanosecond pulse discharge generation device and generation method ) 是由 吴云 朱益飞 宗豪华 卞栋梁 张志波 宋慧敏 贾敏 于 2020-05-20 设计创作，主要内容包括：提供一种低电压、低功率和低电磁干扰的脉冲-交流组合式纳秒脉冲放电产生装置,交流市电电源(1)引入市电；第一开关(2)一端接交流市电电源(1)输出端；第一开关电源(3)的输入端接第一开关(2)的另一端；交流高电压发生器(4)的输入端接第一开关电源(3)的输出端；针尖正电极(5)接交流高电压发生器(4)的输出端；第二开关(6)一端接交流市电电源(1)输出端；第二开关电源(7)的输入端接第二开关(6)的另一端；微型纳秒脉冲低压信号发生器(8)的输入端接第二开关电源(7)的输出端；针尖负电极(9)接微型纳秒脉冲低压信号发生器(8)的输出端。针尖正电极(5)和针尖负电极(9)的尖端彼此相对,针尖正电极(5)和针尖负电极(9)之间可以间隔介质(10)。本发明能够解决在电源负载较大时,实现在低电压、低功率条件下的纳秒脉冲放电。(The pulse-alternating current combined nanosecond pulse discharge generation device with low voltage, low power and low electromagnetic interference is provided, and an alternating current commercial power supply (1) introduces commercial power; one end of the first switch (2) is connected with the output end of the alternating current commercial power supply (1); the input end of the first switch power supply (3) is connected with the other end of the first switch (2); the input end of the alternating-current high-voltage generator (4) is connected with the output end of the first switching power supply (3); the needle point positive electrode (5) is connected with the output end of the alternating current high voltage generator (4); one end of the second switch (6) is connected with the output end of the alternating current commercial power supply (1); the input end of the second switch power supply (7) is connected with the other end of the second switch (6); the input end of the micro nanosecond pulse low-voltage signal generator (8) is connected with the output end of the second switching power supply (7); the needle point negative electrode (9) is connected with the output end of the micro nanosecond pulse low-voltage signal generator (8). The tips of the needle-point positive electrode (5) and the needle-point negative electrode (9) are opposite to each other, and a medium (10) can be arranged between the needle-point positive electrode (5) and the needle-point negative electrode (9). The invention can realize nanosecond pulse discharge under the conditions of low voltage and low power when the power supply load is larger.)

1. A low-voltage, low-power and low-EMI combined pulse-AC nanosecond pulse discharge generating device, comprising: the device comprises a needle point positive electrode (5), a needle point negative electrode (9), an alternating current high voltage generator (4), a micro nanosecond pulse low-voltage signal generator (8), a first switch power supply (3), a second switch power supply (7), an alternating current commercial power supply (1), a first switch (2) and a second switch (6); wherein

The alternating current commercial power supply (1) is introduced into commercial power, and the negative end of the alternating current commercial power supply is grounded;

one end of the first switch (2) is connected with the output end of the alternating current commercial power supply (1);

the input end of the first switch power supply (3) is connected with the other end of the first switch (2);

the input end of the alternating-current high-voltage generator (4) is connected with the output end of the first switching power supply (3);

the needle point positive electrode (5) is connected with the output end of the alternating current high voltage generator (4);

one end of the second switch (6) is connected with the output end of the alternating current commercial power supply (1);

the input end of the second switch power supply (7) is connected with the other end of the second switch (6);

the input end of the micro nanosecond pulse low-voltage signal generator (8) is connected with the output end of the second switching power supply (7);

the needle point negative electrode (9) is connected with the output end of the micro nanosecond pulse low-voltage signal generator (8).

2. A low-voltage, low-power and low-EMI combined pulse-AC nanosecond pulse discharge generating device, comprising: the device comprises a needle point positive electrode (5), a needle point negative electrode (9), an alternating current high voltage generator (4), a micro nanosecond pulse low-voltage signal generator (8), a first switching power supply (3), a second switching power supply (7), an alternating current commercial power supply (1), a first switch (2), a second switch (6) and a medium (10); wherein

The alternating current commercial power supply (1) is introduced into commercial power, and the negative end of the alternating current commercial power supply is grounded;

one end of the first switch (2) is connected with the output end of the alternating current commercial power supply (1);

the input end of the first switch power supply (3) is connected with the other end of the first switch (2);

the input end of the alternating-current high-voltage generator (4) is connected with the output end of the first switching power supply (3);

the needle point positive electrode (5) is connected with the high-voltage output end of the alternating-current high-voltage generator (4);

one end of the second switch (6) is connected with the output end of the alternating current commercial power supply (1);

the input end of the second switch power supply (7) is connected with the other end of the second switch (6);

the input end of the micro nanosecond pulse low-voltage signal generator (8) is connected with the output end of the second switching power supply (7);

the needle point negative electrode (9) is connected with the output end of the micro nanosecond pulse low-voltage signal generator (8);

the tips of the needle point positive electrode (5) and the needle point negative electrode (9) are opposite to each other, and a medium (10) is arranged between the needle point positive electrode (5) and the needle point negative electrode (9);

the medium (10) is an insulating plate, and the thickness of the plate is the maximum thickness for ensuring the discharge glow starting.

3. A low-voltage, low-power and low-electromagnetic interference pulse-alternating current combined nanosecond pulse discharge generation method is characterized by comprising the following steps:

step 1: the alternating current commercial power supply (1) is connected, and the equipment is electrified;

step 2: the first switch (2) is closed, and the output signal of the alternating current commercial power supply (1) is rectified into a direct current voltage signal through the first switch power supply (3);

step 3: the direct-current voltage signal output by the first switching power supply (3) enters the alternating-current high-voltage generator (4) and is converted into a high-voltage alternating-current signal;

step 4: the second switch (6) is closed, and the output signal of the alternating current commercial power supply (1) is rectified into a direct current voltage signal through a second switch power supply (7);

step 5: after a direct-current voltage signal output by the second switching power supply (7) enters the micro nanosecond pulse low-voltage signal generator (8), the direct-current voltage signal is rectified into a nanosecond pulse signal;

step 6: after the nanosecond pulse signal output by the micro nanosecond pulse low-voltage signal generator (8) reaches the needle point negative electrode (9) and the high-voltage alternating-current signal output by the alternating-current high-voltage generator (4) reaches the needle point positive electrode (5), the superposition of high-voltage electric fields generated by the two needle point electrodes can reach a plasma ionization threshold value, so that nanosecond pulse discharge is initiated;

step 7: the overall discharge intensity and frequency of the dielectric barrier discharge are controlled by controlling the amplitude and frequency of the output voltage of the micro nanosecond pulse low-voltage signal generator (8).

4. A method for generating nanosecond pulsed discharge combined pulse-alternating current according to claim 3, characterized in that a medium (10) is placed between the two needle-tip electrodes, the two needle-tip electrodes being separated by the medium (10).

Technical Field

The invention relates to the field of electrical physics, in particular to a pulse-alternating current combined nanosecond pulse discharge generating device and method with low voltage, low power and low electromagnetic interference.

Background

Nanosecond pulse discharge refers to pulse discharge caused by applying an ultrashort high-voltage pulse with a rising edge in a nanosecond time scale between two electrodes. Because the propagation time scale of nanosecond pulse discharge is equivalent to the voltage rise time scale, the discharge has high electric field intensity and is widely applied to ignition combustion supporting, gas purification and biomedicine.

The nanosecond pulse discharge is mainly generated by a nanosecond pulse power supply to generate high-voltage pulse. The common defects of the existing nanosecond pulse power supply are as follows: the main reasons for this are that 220V ac mains needs to be boosted to a specific pulse high voltage waveform in order to form discharge, and because the boosting stage number is very high, heavy equipment such as a transformer and a magnetic compression ring needs to be integrated in the power supply in order to ensure discharge power under a large load, and electromagnetic interference is serious. On the other hand, if the pulse waveform voltage is lowered, the gas cannot be broken down to form discharge, and the effect of nanosecond pulse discharge is difficult to be exhibited.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a pulse-alternating current combined nanosecond pulse discharge generating device with low voltage, low power and low electromagnetic interference, which is characterized by comprising the following components: the device comprises a needle point positive electrode 5, a needle point negative electrode 9, an alternating current high voltage generator 4, a micro nanosecond pulse low-voltage signal generator 8, a first switch power supply 3, a second switch power supply 7, an alternating current commercial power supply 1, a first switch 2 and a second switch 6; wherein

The AC commercial power supply 1 introduces commercial power, and the negative end thereof is grounded;

one end of the first switch 2 is connected with the output end of the alternating current commercial power supply 1;

the input end of the first switch power supply 3 is connected with the other end of the first switch 2;

the input end of the alternating-current high-voltage generator 4 is connected with the output end of the first switching power supply 3;

the needle point positive electrode 5 is connected with the output end of the alternating current high voltage generator 4;

one end of the second switch 6 is connected with the output end of the alternating current commercial power supply 1;

the input end of the second switch power supply 7 is connected with the other end of the second switch 6;

the input end of the micro nanosecond pulse low-voltage signal generator 8 is connected with the output end of the second switching power supply 7;

the needle point negative electrode 9 is connected with the output end of the micro nanosecond pulse low-voltage signal generator 8.

The invention also provides a pulse-alternating current combined nanosecond pulse discharge generating device with low voltage, low power and low electromagnetic interference, which is characterized by comprising the following components: the device comprises a needle point positive electrode 5, a needle point negative electrode 9, an alternating current high voltage generator 4, a micro nanosecond pulse low-voltage signal generator 8, a first switch power supply 3, a second switch power supply 7, an alternating current commercial power supply 1, a first switch 2, a second switch 6 and a medium 10; wherein

The AC commercial power supply 1 introduces commercial power, and the negative end thereof is grounded;

one end of the first switch 2 is connected with the output end of the alternating current commercial power supply 1;

the input end of the first switch power supply 3 is connected with the other end of the first switch 2;

the input end of the alternating-current high-voltage generator 4 is connected with the output end of the first switching power supply 3;

the needle point positive electrode 5 is connected with the high-voltage output end of the alternating-current high-voltage generator 4;

one end of the second switch 6 is connected with the output end of the alternating current commercial power supply 1;

the input end of the second switch power supply 7 is connected with the other end of the second switch 6;

the input end of the micro nanosecond pulse low-voltage signal generator 8 is connected with the output end of the second switching power supply 7;

the needle point negative electrode 9 is connected with the output end of the micro nanosecond pulse low-voltage signal generator 8;

the tips of the needle-point positive electrode 5 and the needle-point negative electrode 9 are opposite to each other, and a medium 10 is arranged between the needle-point positive electrode 5 and the needle-point negative electrode 9;

the dielectric 10 is an insulating plate with a thickness to ensure the maximum thickness of the discharge glow.

In addition, the invention provides a pulse-alternating current combined nanosecond pulse discharge generation method with low voltage, low power and low electromagnetic interference, which is characterized by comprising the following steps:

step 1: the alternating current commercial power supply 1 is switched on, and the equipment is electrified;

step 2: the first switch 2 is closed, and the output signal of the alternating current commercial power supply 1 is rectified into a direct current voltage signal through the first switch power supply 3;

step 3: the direct current voltage signal output by the first switching power supply 3 enters the alternating current high voltage generator 4 and is converted into a high voltage alternating current signal;

step 4: the second switch 6 is closed, and the output signal of the alternating current commercial power supply 1 is rectified into a direct current voltage signal through the second switch power supply 7;

step 5: after a direct-current voltage signal output by the second switching power supply 7 enters the micro nanosecond pulse low-voltage signal generator 8, the direct-current voltage signal is rectified into a nanosecond pulse signal;

step 6: after the nanosecond pulse signal output by the micro nanosecond pulse low-voltage signal generator 8 reaches the needle point negative electrode 9 and the high-voltage alternating current signal output by the alternating current high-voltage generator 4 reaches the needle point positive electrode 5, the superposition of high-voltage electric fields generated by the two needle point electrodes can reach a plasma ionization threshold value, so that nanosecond pulse discharge is initiated;

step 7: by controlling the amplitude and frequency of the output voltage of the micro nanosecond pulse low-voltage signal generator 8, the overall discharge intensity and frequency of the dielectric barrier discharge can be controlled.

In one embodiment of the invention, a medium 10 is placed between the two tip electrodes, with the medium 10 separating the two tip electrodes.

The invention aims to realize nanosecond pulse discharge under the conditions of low voltage and low power when the power supply load is large. The device and the method can overcome the defects of heavy weight, high cost and serious electromagnetic interference of the power supply.

Drawings

Fig. 1 shows a first embodiment of a low-voltage, low-power and low-electromagnetic interference combined pulse-ac nanosecond pulse discharge generating device according to the invention;

fig. 2 shows a second embodiment of a low voltage, low power and low electromagnetic interference combined pulse-ac nanosecond pulse discharge generating device according to the invention;

fig. 3 shows a flow chart illustrating a low voltage, low power and low electromagnetic interference combined pulse-ac nanosecond pulse discharge generation method according to the invention.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, which include, but are not limited to, the following examples.

The present invention is realized by a low-voltage, low-power and low-electromagnetic interference pulse-ac combined nanosecond pulse discharge generating device, as shown in fig. 1, the device of the present invention comprises: the device comprises a needle point positive electrode 5, a needle point negative electrode 9, an alternating current high voltage generator 4, a micro nanosecond pulse low-voltage signal generator 8, a first switching power supply 3, a second switching power supply 7, an alternating current commercial power supply 1, a first switch 2 and a second switch 6. The components are specifically described as follows:

the AC commercial power supply 1 introduces commercial power, and the negative end thereof is grounded;

one end of the first switch 2 is connected with the output end of the alternating current commercial power supply 1;

the input end of the first switch power supply 3 is connected with the other end of the first switch 2;

the input end of the alternating-current high-voltage generator 4 is connected with the output end of the first switching power supply 3;

the needle point positive electrode 5 is connected with the high-voltage output end of the alternating-current high-voltage generator 4;

one end of the second switch 6 is connected with the output end of the alternating current commercial power supply 1;

the input end of the second switch power supply 7 is connected with the other end of the second switch 6;

the input end of the micro nanosecond pulse low-voltage signal generator 8 is connected with the output end of the second switching power supply 7;

the needle point negative electrode 9 is connected with the output end of the micro nanosecond pulse low-voltage signal generator 8;

the tips of the needle-point positive electrode 5 and the needle-point negative electrode 9 are opposite to each other, and a medium 10 (shown in FIG. 2) can be arranged between the needle-point positive electrode 5 and the needle-point negative electrode 9 or not;

the dielectric 10 is an insulating plate with a thickness to ensure the maximum thickness of the discharge glow. The shape of the medium 10 does not normally affect the nanosecond pulsed discharge, although thin plate materials are often used. By placing the medium 10 between the two tip electrodes and separating the two tip electrodes by the medium 10, a possible short circuit phenomenon of the two tip electrodes can be prevented.

The invention discloses a pulse-alternating current combined nanosecond pulse discharge generation method with low voltage, low power and low electromagnetic interference, which comprises the following implementation steps (as shown in figure 2):

step 1: the alternating current commercial power supply 1 is switched on, and the equipment is electrified;

step 2: the first switch 2 is closed, and the output signal of the alternating current commercial power supply 1 is rectified into direct current voltage through the first switch power supply 3;

step 3: the direct current voltage signal output by the first switching power supply 3 enters the alternating current high voltage generator 4 and is converted into a high voltage alternating current signal;

step 4: the second switch 6 is closed, and the output signal of the alternating current commercial power supply 1 is rectified into a direct current voltage signal through the second switch power supply 7;

step 5: after a direct-current voltage signal output by the second switching power supply 7 enters the micro nanosecond pulse low-voltage signal generator 8, the direct-current voltage signal is rectified into a nanosecond pulse signal;

step 6: after the nanosecond pulse signal output by the micro nanosecond pulse low-voltage signal generator 8 reaches the needle point negative electrode 9 and the high-voltage alternating current signal output by the alternating current high-voltage generator 4 reaches the needle point positive electrode 5, the superposition of high-voltage electric fields generated by the two needle point electrodes can reach a plasma ionization threshold value, so that nanosecond pulse discharge is initiated;

step 7: by controlling the amplitude and frequency of the output voltage of the micro nanosecond pulse low-voltage signal generator 8, the overall discharge intensity and frequency of the dielectric barrier discharge can be controlled.

Compared with the existing high-voltage nanosecond pulse source, the invention has the following advantages:

1) the weight is light. Because a large boosting device and a waveform compression device are not arranged, the total weight of the inverter, the high-voltage pack and the micro nanosecond pulse power supply is only 1kg and is less than 10% of that of the common high-voltage nanosecond pulse source;

2) the cost is low. Because large capacitors and high-power switching devices do not need to be purchased, the hardware cost of the invention is only 1-10% of that of the common high-voltage nanosecond pulse power supply;

3) the electromagnetic interference is weak. Because the voltage pulse amplitude value generated by the micro nanosecond pulse module is very low in power, the huge electromagnetic interference generated by the micro nanosecond pulse module is avoided like the traditional nanosecond pulse source.