阅读说明：本技术 冲击电压发生器及其触发脉冲波形调控装置 (Impulse voltage generator and trigger pulse waveform regulating and controlling device thereof ) 是由 李光茂 乔胜亚 朱晨 杨森 刘宇 邓剑平 陈莎莎 刘建成 敖昌民 黄柏 朱璐 于 2019-09-10 设计创作，主要内容包括：本发明涉及一种冲击电压发生器及冲击电压发生器的触发脉冲波形调控装置。一种冲击电压发生器的触发脉冲波形调控装置,包括：波前整形电路,与所述冲击电压发生器连接,用于接收所述冲击电压发生器输出的触发脉冲并对所述触发脉冲的前沿进行整形后输出波前整形脉冲,以缩短所述触发脉冲的上升时间；波尾整形电路,与所述波前整形电路连接,用于接收所述波前整形脉冲并对其后沿进行整形后输出整形脉冲,以缩短所述触发脉冲的下降时间。上述冲击电压发生器的触发脉冲波形调控装置对触发脉冲进行整形以缩短其上升时间和下降时间,由此提高触发脉冲的触发能力。(The invention relates to an impulse voltage generator and a trigger pulse waveform regulating and controlling device of the impulse voltage generator. A trigger pulse waveform regulating and controlling device of a surge voltage generator comprises: the wave front shaping circuit is connected with the impulse voltage generator and is used for receiving the trigger pulse output by the impulse voltage generator, shaping the front edge of the trigger pulse and outputting a wave front shaping pulse so as to shorten the rising time of the trigger pulse; and the wave tail shaping circuit is connected with the wave front shaping circuit and is used for receiving the wave front shaping pulse, shaping the back edge of the wave front shaping pulse and outputting the shaping pulse so as to shorten the falling time of the trigger pulse. The trigger pulse waveform regulating and controlling device of the impulse voltage generator shapes the trigger pulse to shorten the rising time and the falling time of the trigger pulse, so that the triggering capacity of the trigger pulse is improved.)

1. A trigger pulse waveform control device of an impulse voltage generator is characterized by comprising:

the wave front shaping circuit is connected with the impulse voltage generator and is used for receiving the trigger pulse output by the impulse voltage generator, shaping the front edge of the trigger pulse and outputting a wave front shaping pulse so as to shorten the rising time of the trigger pulse;

and the wave tail shaping circuit is connected with the wave front shaping circuit and is used for receiving the wave front shaping pulse, shaping the back edge of the wave front shaping pulse and outputting the shaping pulse so as to shorten the falling time of the trigger pulse.

2. The device according to claim 1, wherein the wave front shaping circuit comprises a middle storage unit and a switch unit, two ends of the middle storage unit are respectively connected with the impulse voltage generator and a ground terminal, the middle storage unit is used for storing the wave front energy of the trigger pulse, two ends of the switch unit are respectively connected with the impulse voltage generator and the wave tail shaping circuit, and the switch unit releases the energy stored in the middle storage unit after being closed.

3. The apparatus of claim 2, wherein the intermediate storage unit comprises an intermediate storage capacitor having a capacitance value in the range of 300pF to 3 nF.

4. The apparatus of claim 3, wherein the capacitance value of the mid-storage capacitor is 1 nF.

5. The apparatus of claim 2, wherein the switch unit comprises a sharpening switch, and a turn-on time of the sharpening switch ranges from 5ns to 50 ns.

6. The apparatus according to claim 1, wherein the wave tail shaping circuit comprises a cable, a filtering unit and a discharging unit, two ends of the cable are respectively connected with the wave front shaping circuit and the filtering unit, the cable is used for outputting the wave front shaping pulse to the filtering unit, the filtering unit is used for receiving the wave front shaping pulse and filtering low-frequency components of a wave tail of the wave front shaping pulse, the discharging unit is connected with the filtering unit, and the discharging unit is used for discharging residual charges of the filtering unit.

7. The apparatus of claim 6, wherein the cable comprises an amplification module for amplifying the wavefront shaped pulses.

8. The apparatus of claim 6, wherein the filter unit is a filter capacitor, and the capacitance range of the filter capacitor is:

and C is the capacitance value of the filter capacitor, and T is the preset tail time of the shaping pulse.

9. The apparatus of claim 6, wherein the discharge unit comprises a ground resistor having a resistance value ranging from 1M Ω to 100M Ω.

10. A surge voltage generator, characterized by comprising a surge voltage generation module and a trigger pulse waveform regulating and controlling device of the surge voltage generator according to any one of claims 1 to 9 connected with the surge voltage generation module, wherein the surge voltage generation module is used for generating a trigger pulse, and the trigger pulse waveform regulating and controlling device of the surge voltage generation module is used for shaping the waveform of the trigger pulse.

Technical Field

The invention relates to the technical field of power electronics, in particular to an impulse voltage generator and a trigger pulse waveform regulating and controlling device of the impulse voltage generator.

Background

The impulse voltage generator with high voltage and large capacity has very wide application in the field of power equipment tests, and when the load capacity of the impulse voltage generator is larger, the impulse voltage generator must have an extremely compact structure and extremely low loop inductance so as to ensure that the impulse voltage generator has enough capacity for driving the load. However, when the surge voltage generator is very compact in structure, the size of the main capacitor and the main switch of the surge voltage generator is inevitably reduced, and a large loop stray capacitor is formed, so that a high requirement is required for triggering.

Disclosure of Invention

Therefore, it is necessary to provide a surge voltage generator and a trigger pulse waveform control device for the surge voltage generator, aiming at the problem that the conventional surge voltage generator cannot meet the harsh requirement for triggering the compact high-capacity surge voltage generator.

A trigger pulse waveform regulating and controlling device of a surge voltage generator comprises:

the wave front shaping circuit is connected with the impulse voltage generator and is used for receiving the trigger pulse output by the impulse voltage generator, shaping the front edge of the trigger pulse and outputting a wave front shaping pulse so as to shorten the rising time of the trigger pulse;

and the wave tail shaping circuit is connected with the wave front shaping circuit and is used for receiving the wave front shaping pulse, shaping the back edge of the wave front shaping pulse and outputting the shaping pulse so as to shorten the falling time of the trigger pulse.

In one embodiment, the wavefront shaping circuit includes a middle storage unit and a switch unit, two ends of the middle storage unit are respectively connected to the impulse voltage generator and a ground terminal, the middle storage unit is used for storing wavefront energy of the trigger pulse, two ends of the switch unit are respectively connected to the impulse voltage generator and the wave tail shaping circuit, and the switch unit releases energy stored in the middle storage unit after being closed.

In one embodiment, the middle storage unit comprises a middle storage capacitor, and the capacitance value of the middle storage capacitor ranges from 300pF to 3 nF.

In one embodiment, the capacitance value of the middle storage capacitor is 1 nF.

In one embodiment, the switch unit comprises a sharpening switch, and the conducting time of the sharpening switch ranges from 5ns to 50 ns.

In one embodiment, the wave tail shaping circuit includes a cable, a filtering unit and a discharging unit, two ends of the cable are respectively connected with the wave front shaping circuit and the filtering unit, the cable is used for outputting the wave front shaping pulse to the filtering unit, the filtering unit is used for receiving the wave front shaping pulse and filtering low-frequency components of a wave tail of the wave front shaping pulse, the discharging unit is connected with the filtering unit, and the discharging unit is used for releasing residual charges of the filtering unit.

In one embodiment, the cable includes an amplification module for amplifying the wavefront shaped pulses.

In one embodiment, the filter unit is a filter capacitor, and a capacitance range of the filter capacitor is:

and C is the capacitance value of the filter capacitor, and T is the preset tail time of the shaping pulse.

In one embodiment, the discharge unit includes a ground resistor having a resistance value ranging from 1M Ω to 100M Ω.

A surge voltage generator comprises a surge voltage generation module and a trigger pulse waveform regulation and control device of the surge voltage generator connected with the surge voltage generation module, wherein the surge voltage generation module is used for sending out trigger pulses, and the trigger pulse waveform regulation and control device of the surge voltage generation module is used for shaping waveforms of the trigger pulses.

The impulse voltage generator and the trigger pulse waveform regulating and controlling device of the impulse voltage generator comprise a wave front shaping circuit and a wave tail shaping circuit, wherein the wave front shaping circuit is used for receiving the trigger pulse output by the impulse voltage generator, shaping the front edge of the trigger pulse and outputting the wave front shaping pulse to shorten the rising time of the trigger pulse, and the wave tail shaping circuit is used for receiving the wave front shaping pulse, shaping the rear edge of the wave front shaping pulse and outputting the shaping pulse to shorten the falling time of the trigger pulse, so that the triggering capacity of the trigger pulse is improved.

Drawings

Fig. 1 is a block diagram of a trigger pulse waveform adjusting and controlling apparatus of a surge voltage generator in an embodiment.

Fig. 2 is a circuit block diagram of a trigger pulse waveform adjusting and controlling device of the impulse voltage generator in an embodiment.

Fig. 3 is a circuit diagram of a trigger pulse waveform adjusting and controlling device of the impulse voltage generator in an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Aiming at the problem that the traditional impulse voltage generator cannot meet the strict requirement for triggering the compact high-capacity impulse voltage generator, the application provides a trigger pulse waveform regulating and controlling device (hereinafter referred to as regulating and controlling device) of the impulse voltage generator. The regulating and controlling device can regulate the waveform of the trigger pulse of the impulse voltage generator, reduce the rise time and the wave tail time of the trigger pulse, improve the high-frequency component of the trigger pulse, and improve the triggering capacity of the trigger pulse, thereby meeting the triggering requirement of the compact high-capacity impulse voltage generator. The control device will be described in detail below.

In one embodiment, as shown in FIG. 1, a conditioning device 10 includes a wavefront shaping circuit 100 and a tail shaping circuit 200.

The wavefront shaping circuit 100 is connected to a surge voltage generator (not shown) and a tail shaping circuit 200, respectively. The surge voltage generator is a high voltage generator that generates pulse waves such as a lightning surge voltage wave and an operating overvoltage wave. The wave front shaping circuit 100 is configured to receive the trigger pulse output by the impulse voltage generator, shape a leading edge of the trigger pulse, and output a wave front shaping pulse, so as to shorten a rise time of the trigger pulse. The wave tail shaping circuit 200 is configured to receive the wave front shaped pulse, shape a trailing edge of the wave front shaped pulse, and output the shaped pulse, so as to shorten a falling time of the trigger pulse. The trigger pulse is shaped by the wave front shaping circuit 100 and the wave tail shaping circuit 200 in sequence and then outputs a shaping pulse, the output shaping pulse shortens the rising time and the falling time relative to the input trigger pulse, and the requirement of triggering a compact high-capacity impulse voltage generator is met.

In one embodiment, as shown in fig. 2, the wavefront shaping circuit 100 includes a storing unit 110 and a switching unit 120. One end of the intermediate storage unit 110 is connected to the surge voltage generator through the input J1 of the wave front shaping circuit to introduce an unshaped trigger pulse. The other end of the middle storage unit 110 is connected to a Ground (GND) which provides a zero potential. The intermediate storage unit 110 is used for storing the wavefront energy of the trigger pulse without shaping. It should be noted that the intermediate storage unit 110 may also introduce the trigger pulse in other ways and is not limited to being connected with the impulse voltage generator to obtain the trigger pulse.

Two ends of the switch unit 120 are respectively connected with the impulse voltage generator and the wave tail shaping circuit 200, that is, the switch unit 120 is also connected with the intermediate storage unit 110, the energy stored in the intermediate storage unit 110 is quickly released after the switch unit 120 is closed, the shaping process of the leading edge of the trigger pulse is completed, the rising time of the trigger pulse is reduced, the trigger pulse shaped by the wave front shaping circuit 100 is the wave front shaping pulse, and the wave front shaping pulse is output to the wave tail shaping circuit 200 through the connection with the wave tail shaping circuit 200.

Specifically, in one embodiment, as shown in fig. 3, the middle storage unit 110 includes a middle storage capacitor C₁. The switch unit 120 includes a sharpening switch S₁. Exemplary, middle storage capacitor C₁Has a capacitance value in the range of 300pF to 3nF, e.g. a medium storage capacitor C₁The high-voltage ceramic low-inductance capacitor is a high-voltage ceramic low-inductance capacitor with the capacitance value of 1nF, the high-voltage ceramic capacitor is a capacitor with the alternating-current working voltage of more than 10KV, or a ceramic capacitor with the direct-current working voltage of more than 40KV, and can adapt to a high-voltage large-capacity impulse voltage generator. Sharpening switch S₁Using a high-pressure gas gap with a conduction time in the order of 10ns and a short conduction time, e.g. sharpening switch S₁The on-time range of (a) is 5ns to 50 ns. The above-mentioned middle storage capacitor C₁And sharpening switch S₁The requirement of rapid discharge can be met, and therefore the rising time of the trigger pulse is shortened.

In an embodiment, referring to fig. 2, the wave tail shaping circuit 200 includes a cable 210, a filtering unit 220, and a discharging unit 230. Both ends of the cable 210 are respectively connected to the wavefront shaping circuit 100 and the filtering unit 220, and the cable 210 is used for outputting the wavefront shaping pulse to the filtering unit 220. In this embodiment, the cable 210 includes an amplification module (not shown) for amplifying the wavefront shaped pulse, and the amplification module can amplify the amplitude of the wavefront shaped pulse by approximately one time. The filtering unit 220 is configured to receive the wavefront shaping pulse and filter out low-frequency components of a wave tail thereof, so as to greatly improve high-frequency components thereof. In this embodiment, the filtering unit 220 receives the amplified wavefront shaping pulse. The two ends of the discharge unit 230 are respectively connected to the filter unit 220 and the ground terminal, the discharge unit 230 is configured to release the residual charges of the filter unit 220, thereby completing a shaping process of the trailing edge of the trigger pulse, reducing the falling time of the trigger pulse, and the wave front shaped pulse shaped by the wave tail shaping circuit 200 is a shaped pulse and is output through the output terminal J2.

Specifically, referring to fig. 3, the filter unit 220 is a filter capacitor C₃. For example, a filter capacitor C₃The high-voltage ceramic low-inductance capacitor is adopted, and the capacitance value selection is the key of wave tail shaping. When the tail time of the trigger pulse without shaping is in microsecond order and the tail time of the shaped pulse output after passing through the tail shaping circuit 200 is in nanosecond order, the filter capacitor C₃The capacitance value range of (a) is:

wherein C is a filter capacitor C₃T is a preset tail time of the shaped pulse. For example, if the tail time of the shaped pulse waveform is 10ns, the corresponding filter capacitor C₃Not exceeding 16 nF.

The discharge unit 230 includes a ground resistor R₁. Ground resistance R₁Using resistors of the order of megohm, e.g. ground resistor R₁The resistance value range of (1M omega-100M omega). Ground resistance R₁Used for outputting the last shaping pulse₃The residual charges on the capacitor are released slowly, and the influence of the residual charges on subsequent output is prevented.

The control device 10 includes a wavefront shaping circuit 100 and a tail shaping circuit 200. On one hand, the wave front shaping circuit 100 shapes the leading edge of the trigger pulse to shorten the rise time of the trigger pulse, and on the other hand, the wave tail shaping circuit 200 shapes the wave tail of the trigger pulse to shorten the wave tail time of the trigger pulse and greatly improve the high-frequency component of the trigger pulse, thereby improving the triggering capability of the trigger pulse and meeting the harsh requirements on triggering the compact high-capacity impulse voltage generator.

The application also provides a surge voltage generator, which comprises a surge voltage generation module and the regulation and control device 10 connected with the surge voltage generation module and provided with any one of the above embodiments. The impulse voltage generation module is used for emitting a trigger pulse, and the regulation and control device 10 is used for shaping the waveform of the trigger pulse.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.