CN111381143A - RBDT dynamic characteristic testing device and testing method - Google Patents

Abstract

The invention belongs to the field of power semiconductor device characteristic testing, and in particular relates to an RBDT dynamic characteristic testing device and a testing method. The device comprises: a Marx generator, a pulse discharge circuit including an RBDT to be tested, a charger, a first current limiting resistor, a first diode; the charger controls the charging of the Marx generator and the pulse discharge circuit; the Marx generator is connected in series with the RBDT to be tested to form a loop, and outputs different trigger voltage pulses to the RBDT to be tested after charging; the first current limiting resistor and the first A diode is arranged on the loop formed by the Marx generator and the RBDT to be tested, to prevent the pulse circuit of the RBDT to be tested from affecting the work of the Marx generator, and to protect the switching devices on the Marx generator. The invention accurately obtains the waveform parameters reflecting the dynamic characteristics of the RBDT by changing the control mode of the Marx generator to output trigger voltage pulses with different dynamic characteristics.

Description

A kind of RBDT dynamic characteristic testing device and testing method

technical field

The invention belongs to the field of power semiconductor device characteristic testing, and more particularly, relates to an RBDT dynamic characteristic testing device and a testing method.

Background technique

Pulse power technology refers to the electro-physical technology that stores the energy for a long time, and then releases the stored energy to the load in a very short time by turning on the device to generate high-power electrical pulses. It is widely used in physical technology, sewage purification and other fields; the energy storage methods of pulse power generating circuits in the prior art are mostly capacitive energy storage and inductive energy storage.

In pulsed power systems, gas switches and liquid switches are commonly used, such as spark gaps, thyratrons and oil-immersed switches. These switches have high withstand voltage and large current, but are unstable in operation, with low life and low operating frequency. . With the rapid development of semiconductor switches in recent years, more and more semiconductor switches are applied to pulse power applications, such as thyristors and insulated gate bipolar transistors in power electronics. These switches have high operating frequency, stable operation and long lifespan, but have weak current-passing capability at low voltages.

In order to adapt to the development of pulse power technology, pulse power semiconductor devices specially applied to pulse power technology have also been further studied, such as RBDT (reverse blocking diode thyristor, reverse blocking transistor thyristor). An RBDT is a voltage-triggered semiconductor device, which is a two-terminal device with an anode and a cathode, and no ports dedicated to triggering turn-on or turn-off. The triggering process of the RBDT is to apply a voltage pulse with a large rising rate to the RBDT in the forward direction. After the trigger voltage is applied, the RBDT can be turned on in a very short time. RBDT is a semiconductor device with the advantages of strong current capacity, high reliability and small size.

At present, the existing RBDT test circuits use the voltage on the capacitor to be instantly applied to the RBDT after the switch is closed and turned on, so as to trigger the opening of the RBDT. In order to output a voltage pulse with a large peak value, a transformer is generally used. This kind of test circuit generally cannot change some output voltage parameters, for example, when changing the output voltage rising rate, it cannot guarantee that the output voltage peak value remains unchanged. This test circuit cannot fully and accurately measure the waveform and its parameters reflecting the dynamic characteristics of the RBDT.

SUMMARY OF THE INVENTION

The present invention provides an RBDT dynamic characteristic test device and a test method, which are used to solve the problem that the existing RBDT test circuit cannot output the RBDT trigger signal required by various parameters required, thereby causing the waveform and Technical issues with its parameters.

The technical solution of the present invention to solve the above technical problems is as follows: an RBDT dynamic characteristic testing device, comprising: a Marx generator, a pulse discharge circuit including the RBDT to be tested, a charger, a first current limiting resistor, and a first diode;

Wherein, the charger is used to control the charging process of the Marx generator and the pulse discharge circuit and perform charging; the Marx generator is connected in series with the RBDT to be tested to form a loop, which is used for charging to the Max generator after charging. The RBDT to be tested outputs trigger voltage pulses with different dynamic characteristics; the pulse discharge circuit is used to discharge when the RBDT to be tested is turned on under the trigger of the trigger voltage pulse, and the discharge current flows through the RBDT to be tested , in order to analyze the dynamic characteristics of the RBDT to be tested, the first current limiting resistor and the first diode are all arranged on the loop formed by the Marx generator and the RBDT to be tested, and the first diode The tube is used to prevent the pulse discharge circuit from discharging to the Marx generator before the RBDT to be tested is turned on, and the first current limiting resistor is used to prevent the switching device inside the Marx generator from flowing through an excessively large when the RBDT is turned on. damaged by current;

The dynamic characteristics include a rise rate, an amplitude and a pulse width of the trigger voltage pulse.

The beneficial effects of the present invention are: the test device proposed by the present invention utilizes the principle of the Marx generator, and by changing its control mode, it can output output waveforms with different voltage rising rates under a certain peak voltage, or under the same voltage rising rate The output waveforms of different peak voltages, and the test device will not interfere with the measured waveforms, and the waveform parameters of the dynamic characteristics of the RBDT can be accurately obtained. However, when some parameters of the trigger voltage waveform output by the existing test methods cannot meet the requirements, for example, when the output voltage rise rate is changed, the output voltage will follow the change, which is not conducive to an accurate test of the dynamic characteristics of the RBDT. Therefore, the present invention introduces a Marx generator, which solves the technical problem that the existing RBDT test circuit cannot output the RBDT trigger signal required by various parameters required, thereby causing the waveform and its parameters that cannot comprehensively and accurately reflect the dynamic characteristics of the RBDT.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the Marx generator includes: a first control module, a one-to-one correspondence of n first drive modules, n first switching devices and n first energy storage capacitors, a plurality of second current limiting resistors, and a plurality of second diodes;

Wherein, the first control module is used to independently send control signals to the n first driving modules to drive the n first switching devices to be turned on at the corresponding turn-on time; The corresponding first energy storage capacitors are connected in series and output a trigger voltage to the RBDT to be tested;

The plurality of second current limiting resistors are used to limit each of the first energy storage capacitors when the n first switching devices are all turned off and the charger simultaneously charges the n first energy storage capacitors In addition, after the charging and when the first switching device is turned on, the discharge of each of the first energy storage capacitors is restricted to prevent the turned on first switching device from being damaged due to the excessive discharge current of the first energy storage capacitor; The plurality of second diodes are used to prevent the formation of a discharge loop between the plurality of first energy storage capacitors corresponding to the plurality of first switching devices when the plurality of first switching devices are turned on, thereby affecting the first switching device. The control precision of a control module.

The further beneficial effects of the present invention are: according to actual needs, the required trigger voltage amplitude is output by changing the size of the charging voltage of each energy storage capacitor and/or the number of switches turned on at each moment, and by selecting different trigger turn-on moments in time The switches are turned on or the turn-on time of each and its turn-on switches is controlled to achieve a voltage pulse with a desired rate of rise.

Further, the pulse width of the trigger voltage pulse output by the Marx generator is greater than the pulse width of the current pulse output by the pulse discharge circuit.

The further beneficial effect of the present invention is: in order to weaken the influence of the Marx generator on the RBDT test result, the pulse width of the voltage pulse output by the Marx generator needs to be larger than the pulse width of the current pulse output by the pulse discharge circuit in the device, which can avoid the occurrence of Marx When all the switching devices in the device are turned off, the sudden change of the circuit brings electromagnetic interference to the RBDT characteristic test.

Further, the resistance value of the first current limiting resistor is determined based on the peak voltage and pulse width of the trigger voltage pulse output by the Marx generator.

The further beneficial effect of the present invention is: when the pulse width of the trigger voltage pulse output by the Marx generator is large, the output end of the Marx generator needs to be connected in series with a resistor R _limit to prevent the switching device opened in the Marx generator after the RBDT is triggered and opened because the Excessive current flow and damage.

Further, the pulse discharge circuit includes: a second energy storage capacitor, a load resistor, a third diode and the RBDT to be measured that are connected in series and form a loop; and when the second energy storage capacitor is discharged, the The pulse discharge circuit creates a current pulse across the load resistance.

Further, the charger includes: a second control module, a second driving module, a first charging circuit connected in series with each of the first energy storage capacitors, a third driving module, and a connection with the second energy storage capacitor a second charging circuit connected in series;

The second control module is used for sending a driving signal to the second driving module before the dynamic test, so as to turn on the first charging circuit to charge each of the first energy storage capacitors, and to the third driving module The module sends a driving signal to turn on the second charging circuit to charge the second energy storage capacitor.

Further, the first charging circuit includes: a second switching device, a first power supply and a third current limiting resistor connected in series and forming a loop with each of the first energy storage capacitors, wherein the second switching device is driven and turned on by the second driving module;

The second charging circuit includes: a third switching device connected in series and forming a loop with the second energy storage capacitor, a second power supply and a fourth current limiting resistor, wherein the third switching device is composed of the third switching device. The driver module driver is turned on.

Further, the charging voltage is determined according to the actual required trigger voltage amplitude.

Further, an interference isolation element is provided between the first control module and each of the first drive modules, and/or the second control module is respectively connected to the second drive module and the third drive module There are interference isolation elements between them.

The present invention also provides a kind of RBDT dynamic characteristic testing method, including:

The RBDT to be tested is arranged in any RBDT dynamic characteristic testing device as described above;

Controlling the Max generator in the RBDT dynamic characteristic testing device to generate trigger pulse voltages of different dynamic characteristics to be applied to the RBDT to be tested;

Detecting whether the pulse discharge circuit in the RBDT dynamic characteristic test device is turned on under each dynamic characteristic, and based on the voltage across the corresponding RBDT under each turn-on and the current output by the discharge of the pulse discharge circuit pulse to obtain the dynamic characteristics of the RBDT to be tested.

Description of drawings

Fig. 1 is the schematic block diagram of a kind of RBDT dynamic characteristic testing device provided by the present invention;

Fig. 2 is a kind of RBDT dynamic characteristic testing device circuit diagram provided by the present invention;

FIG. 3 is a trigger signal diagram of the first switching device at each level of the 5-level Marx generator in an RBDT dynamic characteristic testing device provided by the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

An RBDT dynamic characteristic testing device, as shown in FIG. 1 , includes: a Marx generator, a pulse discharge circuit including the RBDT to be tested, a charger, a first current limiting resistor, and a first diode;

Among them, the charger is used to control and charge the Marx generator and the pulse discharge circuit; the Marx generator is connected in series with the RBDT to be tested to form a loop, which is used to output trigger voltage pulses with different dynamic characteristics to the RBDT to be tested after charging; The pulse discharge circuit is used to discharge when the RBDT to be tested is turned on under the trigger of the trigger voltage pulse, and the discharge current flows through the RBDT to be tested to analyze the dynamic characteristics of the RBDT to be tested. The first current limiting resistor and the first diode are both Set on the loop formed by the Marx generator and the RBDT to be tested. The first diode is used to prevent the pulse discharge circuit from discharging to the Marx generator before the RBDT to be tested is turned on. The first current limiting resistor is used to prevent the occurrence of Marx when the RBDT is turned on. The switching device inside the device is damaged due to excessive current flowing;

The dynamic characteristics include a rise rate, an amplitude and a pulse width of the trigger voltage pulse.

Using the principle of the Marx generator, by changing its control method, it can output the output waveforms of different voltage rise rates under a certain peak voltage, or the output waveforms of different peak voltages under the same voltage rise rate, and the test device will not If the measured waveform interferes, the waveform parameters of the dynamic characteristics of the RBDT can be accurately obtained. However, when some parameters of the trigger voltage waveform output by the existing test methods cannot meet the requirements, for example, when the output voltage rise rate is changed, the output voltage will follow the change, which is not conducive to an accurate test of the dynamic characteristics of the RBDT. Therefore, the present invention introduces a Marx generator, which solves the technical problem that the existing RBDT test circuit cannot output the RBDT trigger signal required by various parameters required, thereby causing the waveform and its parameters that cannot comprehensively and accurately reflect the dynamic characteristics of the RBDT.

Preferably, as shown in FIG. 2 , an RBDT dynamic characteristic testing device includes: a Marx generator, a pulse discharge circuit of the RBDT to be tested, a charger, and a peripheral circuit.

The charger part includes: a DC voltage source DC ₁ for charging the energy storage capacitors C ₁ -C _n in parallel in the Marx generator, a resistor R ₀ , a switching device T ₁ and a T ₁ drive module, a control module 2 , and a The DC voltage source DC ₂ , the resistor R ₂₁ , the switching devices T ₂ and T ₂ are used to charge the energy storage capacitor C ₀ in the pulse discharge circuit to drive the module.

The energy storage capacitors C ₁ -C _n are the n first energy storage capacitors, the DC voltage source DC ₁ is the first power supply, the resistor R ₀ is the third current limiting resistor, and the switching device T ₁ is the is the aforementioned second switching device, the T1 drive module is the aforementioned second drive module, the control module ₂ is the aforementioned second control module, the energy storage capacitor C ₀ is the aforementioned second storage capacitor, and the DC voltage source DC ₂ is the aforementioned second storage capacitor. For the aforementioned second power supply, the resistor R ₂₁ is the aforementioned fourth current limiting resistor, the switching device T ₂ is the aforementioned third switching device, and the T ₂ driving module is the aforementioned third driving module.

The Marx generator includes: a plurality of modules formed by capacitor C ₂ , MOSFET S ₂ , diode D ₂₄ and resistor R ₃ in a dashed-line box, capacitor C _n , resistor R _2n+1 , MOSFET S _n , and the driving of switches at all levels module (drive module 1 - drive module n) and control module 1. The switch devices at all levels in the Marx generator have their own drive modules, each drive module receives independent control signals, and the control signals are output by the control module 1 . DC ₁ , R ₀ and T ₁ constitute the charging circuit of the Marx generator, and the switching device T ₁ is driven by the T ₁ driving module, which receives the control signal output from the control module 2 . The Marx generator is used to output the trigger voltage pulse signal of the RBDT.

Wherein, the capacitor C ₂ -capacitor C _n are the aforementioned first energy storage capacitors, the MOSFET S _{2 -MOSFET} Sn are the aforementioned first switching device, the diode D ₂₄ is the aforementioned second diode, the resistor R ₃ , the resistor R 3 R _2n+1 is the aforementioned second current limiting resistor, the driving module 1 - the driving module n are the aforementioned first driving module, and the control module 1 is the aforementioned first control module.

The pulse discharge circuit includes: energy storage capacitor C ₀ , resistor R ₂₂ , diode D ₂ , and RBDT. In the figure, DC ₂ , R ₂₁ and T ₂ constitute the charging circuit of the RBDT pulse discharge circuit to be tested. T ₂ is driven by the T ₂ drive module, which drives and receives the control signal output by the control module 2 . The peripheral circuit includes: resistor R _limit and diode D ₁ .

The resistor R ₂₂ is the aforementioned load resistor, the diode D ₂ is the aforementioned third diode, the resistor R _limit is the first current limiting resistor, and the diode D ₁ is the aforementioned first diode.

It should be noted that the DC voltage source DC ₁ , the resistor R ₀ , the switching devices T ₁ and T ₁ drive modules of the charger part can belong to the Marx generator, and the DC voltage source DC ₂ , the resistor R ₂₁ , the switch of the charger part The device T ₂ , the T ₂ drive module and the control module 2 can be classified as a pulse discharge circuit.

Specifically, the control module 1 is used to independently send driving signals to the n driving modules to drive the _n switching devices S ₁ -S _n to be turned on at the corresponding moments; in particular, the switching device Sn must be triggered first; , the first energy storage capacitors corresponding to each opened switch are connected in series and output the trigger voltage to the RBDT to be tested; the second current limiting resistors (resistors R ₁ , R ₃ , R _2n+1 ) in the Marx generator and the first Two diodes (diodes D ₂₂ , D ₂₄ . . . ) are used to limit the time when the n switching devices S ₁ -S _n are all turned off and the charger charges the n first energy storage capacitors at the same time. charging current; in addition, after the charging and when the switching device is turned on, the discharge of the storage capacitor is hindered.

As shown in Figure 2, the connection relationship of each element of the Marx generator is as follows: DC ₁ is connected to one end of R ₀ , the other end of R ₀ is connected to T ₁ , and then the modules shown in the dotted box are cascaded , one end of C ₂ in the module is connected to R ₄ and S ₂ , the other end of C ₂ is connected to R ₃ , the other end of R ₃ is connected to the other end of S ₂ , for n-level Marx generators, there are a total of n-1 For such a module, one end of C _n is connected to R _{2n+1 ,} the other end of C _n is connected to _Sn , and the other end of R 2n+1 is connected to the other end of _Sn .

In the peripheral circuit, R _limit is connected with one end of _Sn in the Marx generator, the other end is connected with the anode of D ₁ , and the cathode of D ₁ is connected with the anode of RBDT.

The connection relationship of each element of the pulse discharge circuit is as follows: DC ₂ is connected to one end of R ₂₁ , one end of R ₂₁ is connected to one end of T ₂ , the other end of T ₂ is connected to C ₀ and R ₂₂ , and the other end of R ₂₂ is connected to D ₂ anode is connected, the cathode of D2 is connected to the anode of _RBDT , the cathode of _RBDT is connected to the other end of _C0 and _DC2 , one end of DC2 is connected to one end of _C1 in the Marx generator.

The charger is used to control and charge the Marx generator and the pulse discharge circuit; the Marx generator is connected in series with the RBDT to be tested to form a loop, which is used to output trigger voltage pulses with different dynamic characteristics to the RBDT to be tested after charging; To analyze the dynamic characteristics of the RBDT under load, the test device also has a pulse discharge circuit for the RBDT to be tested. The pulse discharge circuit is used to discharge when the RBDT to be tested is turned on under the trigger of the trigger voltage pulse, and the discharge current flows through the RBDT to be tested. , in order to analyze the dynamic characteristics of the RBDT to be tested, the above-mentioned dynamic characteristics include the rising rate, amplitude and pulse width of the trigger voltage pulse; D ₁ is set on the loop between the Marx generator and the RBDT to be tested, and is used to prevent the pulse circuit of the RBDT to be tested. Affects the Marx generator.

When testing the dynamic characteristics of the RBDT to be tested, when the Marx generator needs to output voltage pulses with different rise rates but the same peak voltage, this can control the Marx by keeping the charging voltage of each energy storage capacitor in the Marx generator unchanged by the charger. The turn-on time of the switching devices S ₁ -S _n in the generator is used to control the discharge of the energy storage capacitors to the RBDT at different times; if it is necessary to output voltage pulses with the same voltage rise rate but different peak voltages, the charger will The charging voltage of each energy storage capacitor in the Marx generator needs to be changed, and the turn-on time of the switching devices S ₁ -S _n in the Marx generator is adjusted to ensure that the output voltage pulse rises at the same rate, so the output power of each energy storage capacitor is controlled. At the time and the charging voltage of the charger to each energy storage capacitor in the Marx generator, the output of various trigger voltage pulses can be realized. When the switching devices S ₁ -S _n in the Marx generator are turned on at the same time, the voltage output by the Marx generator has the largest voltage rising rate at this time, and the voltage peak value will also be the largest.

The Marx generator is used to provide the trigger voltage of RBDT. When the switching devices S ₁ -Sn are in the off state, the charger charges the capacitors C ₁ -C _n at the same time. After the charging is completed, when S ₁ -S _n are still in the off state When the output voltage Vmarx of the Marx generator is 0V, when the trigger voltage needs to be applied to the RBDT, the control module 1 outputs a control signal to the driving module corresponding to each switching device of S ₁ -S _n . When S ₁ -S _n completes the state transition , since the capacitor voltage does not have abruptness, and multiple circuit protection elements prevent the rapid discharge of capacitors C ₁ -C _n , the output voltage of the Marx generator at this time is:

In the formula, Yi has only two values, 0 and 1. When the switching device Si _{( i} is any one of 1 to _n ) is in the off state, _Yi is 0. If the switching device Si is in the on state, Yi is in the on state. is 1, and V _DC1 is the output voltage of the charger power supply DC ₁ . Among them, when the Marx generator outputs the voltage, the switching device _Sn must be in a conducting state. It can be seen from the above that controlling the states of each switch of S ₁ -S _n can achieve different Max output voltage peaks.

For example, for a 5-level Marx generator, the trigger signals of each switching device of S ₁ -S ₅ are delayed by 10ns or 20ns in sequence. When the trigger signal is delayed by 10ns in sequence, the voltage pulse output rate of the Marx generator will be greater than The rate of rise of the voltage pulse output by the Marx generator when the trigger signal is delayed by 20ns.

When the trigger signals _of S ₁ -S _n are all the same, the voltage output by the Marx generator has the largest voltage rise rate at this time, and the voltage peak value will also be the largest. _Sn requires the use of switching devices with shorter trigger turn-on times.

It should be noted that the switching devices S ₁ -S _n in the Marx generator generally choose to use MOSFETs with faster turn _- on speeds. If the test requirements are met, other semiconductor switching devices such as IGBTs can also _be used. There are independent driving module circuits, and the control signals received by each driving module circuit are also independent of each other, and the control signals are given by the control module 1 . In addition, since there are many drive circuits that can be used for MOSFETs, the drive module 1 to drive module n do not have a fixed circuit topology. As long as the drive circuits that can normally trigger and turn on the MOSFET can be used in these drive modules.

Among them, the switching device T ₁ and the switching device T ₂ can be controlled devices such as IGBT, thyristor and MOSFET. Since the switching device T1 and the switching device _T2 can use many driving circuits, the _T1 driving module and the _T2 driving module do not have _a fixed circuit topology, as long as the driving circuit that can normally trigger the switch can be used in these used in the drive module.

In order to reduce the influence of the Marx generator on the RBDT test results, the pulse width of the voltage pulse output by the Marx generator needs to be larger than the pulse width of the current pulse output by the pulse discharge circuit in the device, which can avoid the S ₁ -S _n switch in the Marx generator When the device is turned off, the sudden change of the circuit structure brings electromagnetic interference to the RBDT characterization test.

In addition, the resistance value of the current limiting resistor R _lmit is determined based on the peak voltage and pulse width of the trigger voltage pulse output by the Marx generator.

In the Marx generator, interference isolation elements are provided between the control module ₁ and the n first driving modules, and in the charger, interference isolation elements are provided between the control module ₂ and the T1 driving module and the T2 driving module respectively. .

It should be noted that the control module 1 and the control module 2 can be implemented by the same control circuit, and these control circuits do not have a fixed circuit form, and are generally composed of chips such as DSP, single-chip microcomputer, or FPGA.

The test device has a variety of working modes, one of which is as follows: ₁ ) The control module ₂ simultaneously outputs control signals to the T ₁ drive module and the T ₂ drive module. , DC ₁ charges the capacitors C ₁ -C _n until the voltage is stable, and DC ₂ charges the capacitor C ₀ until the voltage is stable; 2) The control module 1 outputs different control signals to the driving module 1 - the driving module n, and the driving module is in the corresponding 2) RBDT withstands the voltage pulse output by the Marx generator, if the voltage pulse meets the conditions of the RBDT trigger voltage, the RBDT will be triggered and turned on in a short time; 3 ) After the RBDT is turned on, the capacitor C ₀ discharges the R ₂₂ to generate a current pulse; 4) Use the current probe and the voltage probe to test the current and voltage of the RBDT.

As shown in FIG. 3 , the triggering signals of the switching devices of the five-level Marx generators in the test device (the value of n above is 5), and the triggering signals of the switches of each level are delayed by 10ns in turn. Assuming that the trigger signal of S1 is issued at time ₀ , the trigger signal of S2 is issued at _10ns , the trigger signal _of S3 is issued at 20ns, the trigger signal of S4 is issued at _30ns , and the trigger signal of S5 is issued at _40ns . Except for the different delay time, the trigger waveforms of the switching devices at all levels are the same. The pulse width of the trigger waveform is 10 μs, and the pulse width of the RBDT trigger voltage output by the Marx generator is also 10 μs.

Embodiment 2

An RBDT dynamic characteristic testing method, comprising:

The RBDT to be tested is arranged in any RBDT dynamic characteristic testing device as described in the first embodiment;

Control the Max generator in the RBDT dynamic characteristic test device to generate trigger pulse voltages with different dynamic characteristics to be applied to the RBDT to be tested;

Detect whether the pulse discharge circuit in the RBDT dynamic characteristic test device is turned on under each dynamic characteristic, and obtain the dynamic characteristic of the RBDT to be tested based on the measured voltage across the RBDT and the current pulse output by the discharge of the pulse discharge circuit.

Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, etc., All should be included within the protection scope of the present invention.

Claims (10)

1. An RBDT dynamics testing apparatus, comprising: the Marx generator comprises a pulse discharge circuit of the RBDT to be detected, a charger, a first current limiting resistor and a first diode;

the charger is used for controlling the charging process of the Marx generator and the pulse discharging circuit and charging; the Marx generator is connected with the RBDT to be tested in series to form a loop and is used for outputting trigger voltage pulses with different dynamic characteristics to the RBDT to be tested after the charging; the pulse discharge circuit is used for discharging after the RBDT to be detected is triggered to be turned on by the trigger voltage pulse, the discharge current flows through the RBDT to be detected so as to analyze the dynamic characteristics of the RBDT to be detected, the first current limiting resistor and the first diode are arranged on a loop formed by the Marx generator and the RBDT to be detected, the first diode is used for preventing the pulse discharge circuit from discharging to the Marx generator before the RBDT to be detected is turned on, and the first current limiting resistor is used for preventing a switching device in the Marx generator from being damaged due to the fact that overlarge current flows through the switching device when the RBDT is turned on

The dynamic characteristics include a rise rate, an amplitude, and a pulse width of the trigger voltage pulse.

2. An RBDT dynamic behavior testing arrangement according to claim 1, wherein the Marx generator comprises: the first control module comprises n first driving modules, n first switching devices, n first energy storage capacitors, a plurality of second current limiting resistors and a plurality of second diodes, wherein the n first driving modules, the n first switching devices and the n first energy storage capacitors are in one-to-one correspondence;

the first control module is used for respectively and independently sending control signals to the n first driving modules so as to drive the n first switching devices to be switched on at corresponding switching-on moments; at each time, the first energy storage capacitors corresponding to the switched-on first switching devices are connected in series and output trigger voltage to the RBDT to be detected;

the plurality of second current limiting resistors are used for limiting the charging current of each first energy storage capacitor when the n first switching devices are all disconnected and the charger simultaneously charges the n first energy storage capacitors; in addition, after the charging and when the first switch device is switched on, the first energy storage capacitors are limited to discharge, and the first switched-on switch device is prevented from being damaged due to overlarge discharge current of the first energy storage capacitors; the plurality of second diodes are used for preventing a discharging loop circuit from being formed among the plurality of first energy storage capacitors corresponding to the plurality of first switching devices when the plurality of first switching devices are switched on, so that the control precision of the first control module is not influenced.

3. An RBDT dynamics testing apparatus according to claim 1, characterized in that the pulse width of the trigger voltage pulse output by said Marx generator is larger than the pulse width of the current pulse output by the pulse discharge circuit.

4. An RBDT dynamic behavior testing arrangement according to claim 1, wherein the resistance of the first current limiting resistor is determined based on the peak voltage and the pulse width of the trigger voltage pulse output by the Marx generator.

5. An RBDT dynamics testing arrangement according to claim 2, wherein the pulse discharge circuit includes: the second energy storage capacitor, the load resistor, the third diode and the RBDT to be detected are connected in series and form a loop; and when the second energy storage capacitor discharges, the pulse discharge circuit forms a current pulse on the load resistor.

6. An RBDT dynamics testing apparatus according to claim 5, wherein said charger includes: the second control module, the second driving module, the first charging circuit connected with each first energy storage capacitor in series, the third driving module and the second charging circuit connected with the second energy storage capacitor in series;

the second control module is used for sending a driving signal to the second driving module to conduct the first charging circuit to charge the first energy storage capacitors and sending a driving signal to the third driving module to conduct the second charging circuit to charge the second energy storage capacitors before dynamic testing.

7. An RBDT dynamics testing apparatus according to claim 6, wherein said first charging circuit comprises: the second switching device, the first power supply and the third current-limiting resistor are connected in series and form a loop with each first energy-storing capacitor, wherein the second switching device is driven to be switched on by the second driving module;

the second charging circuit includes: and the third switching device, the second power supply and the fourth current-limiting resistor are connected in series and form a loop with the second energy-storing capacitor, wherein the third switching device is driven by the third driving module to be switched on.

8. An RBDT dynamics testing apparatus according to claim 6, wherein the charging voltage is determined in accordance with the actual required magnitude of the trigger voltage.

9. An RBDT dynamics testing apparatus according to claim 6, characterised in that interference isolation elements are provided between the first control module and each of the first drive modules and/or between the second control module and the second and third drive modules respectively.

10. An RBDT dynamic characteristic testing method is characterized by comprising the following steps:

setting an RBDT to be tested in an RBDT dynamic testing apparatus according to any one of claims 1 to 9;

controlling a Marx generator in the RBDT dynamic characteristic testing device to generate trigger voltage pulses with different dynamic characteristics to be applied to the RBDT to be tested;

and detecting whether the pulse discharge circuit in the RBDT dynamic characteristic testing device is conducted under each dynamic characteristic, and obtaining the dynamic characteristic of the RBDT to be tested based on the voltage at two ends of the RBDT to be tested corresponding to each conduction and the current pulse output by the pulse discharge circuit in a discharge mode.

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