CN115967374B - High-voltage pulse generating device based on all-solid-state switch series-parallel connection - Google Patents
High-voltage pulse generating device based on all-solid-state switch series-parallel connection Download PDFInfo
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Abstract
A high voltage pulse generating device based on an all-solid-state switch series-parallel connection, comprising: the system comprises a control signal generation module, a solid-state switch driving circuit module, an all-solid-state MARX generator module, a pulse transformer module and a load; the invention provides a high-voltage pulse generating device based on the combination of an IGBT series-parallel all-solid-state Marx generator and a pulse transformer, which is used for realizing the output of ultra-high pulse voltage. The invention realizes the improvement of the current capacity and the voltage-withstanding capacity of the Marx generator through the IGBT series-parallel connection, and ensures the reliable operation of the high-voltage pulse generating device.
Description
Technical Field
The invention relates to the field of pulse power device application, in particular to a high-voltage pulse generating device based on an all-solid-state switch series-parallel connection.
Background
With the development of semiconductor power electronic devices and the application requirements of industries such as high-power laser, national defense, military industry, sewage treatment and the like, an all-solid-state Marx generator technology appears, and the all-solid-state Marx generator adopts a semiconductor power device as a charge-discharge switch. The application of the all-solid-state Marx generator technology makes the development of the pulse power technology progress to high voltage, high current and fast pulse, and the high repetition frequency. And the output voltage and current capability of the Marx generator depend on the withstand voltage and the magnitude of the through current of the semiconductor power device. The through-current capability and the voltage withstand level of a single all-solid-state switching device are close to the limit of normal application due to the constraint of the material characteristics and the manufacturing process, and cannot meet the application requirements of larger current capacity and larger voltage withstand. Considering the cost of the generator, the number of driving circuits and the size of the generator, the use of a plurality of all-solid-state switch series-parallel connections (series-first and parallel-second) becomes an effective method for improving the output capacity of the Marx generator.
The high-voltage pulse transformer is an important component in a high-power pulse circuit, is mainly used in a high-voltage capacitor bank discharging circuit, has a primary side connected with a capacitor bank in series and a secondary side connected with a load, and realizes low-voltage to high-voltage conversion through the pulse transformer. The high-voltage pulse device is widely applied to high-voltage pulse devices such as radar transmitters, laser power supplies, electron accelerators, insulation testers and the like. The microwave sources such as a magnetron or a klystron and the like and the insulation property test all need higher pulse voltage, and the pulse transformer is needed for boosting.
The conventional Marx generator employs a series stack to boost the output amplitude of the pulse generator, which is limited by the semiconductor power device parameters. In order to output high-amplitude voltage, the number of stages is required to be superimposed, the number of driving circuits is increased, and the cost is increased. However, the device is still not suitable for application scenes with large output current, such as the high-voltage pulse generating device provided by the invention, and the maximum amplitude of the output pulse current of the Marx generator at the front end of the device can reach more than 1000A. Considering the cost and the performance of the all-solid-state switch, the high-voltage and high-current output of the Marx generator is preferably realized by adopting an all-solid-state switch series-parallel mode.
Disclosure of Invention
The invention aims to provide a high-voltage pulse generating device based on an all-solid-state switch series-parallel connection, which comprises the following components: the system comprises a control signal generation module, a solid-state switch driving circuit module, an all-solid-state MARX generator module, a pulse transformer module and a load.
The control signal generation module is used for generating a switch control signal.
And after receiving the switch control signal, the solid-state switch driving circuit module controls the on and off of each switch tube in the all-solid-state MARX generator module and the time of the on and off.
The all-solid-state MARX generator module is configured to provide a low voltage output signal to the pulse transformer module.
The all-solid-state MARX generator module includes n cascaded MARX circuits.
The pulse transformer module converts the low voltage output signal into a high voltage pulse and inputs the high voltage pulse into a load.
The circuit topology of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection is as follows:
the positive electrode of the DC power supply Vdc is denoted as an A end, the negative electrode is denoted as a B end, and the B end is grounded.
The A end is connected in series with a fast recovery diode D 1 Fast recovery diode D 1 Is connected in series with an energy storage capacitor C 1 And then connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-1 Collector of solid state switch S 1-1 Emitter series solid state switch S 1-3 Collector of solid state switch S 1-3 Emitter series fast recovery diode D 2 Cathode of fast recovery diode D 2 Is connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-2 Collector of solid state switch S 1-2 Emitter series solid state switch S 1-4 Collector of solid state switch S 1-4 Emitter series fast recovery diode D 2 Is provided.
The fast recovery diode D 2m-1 Anode series solid state switch S k-2 Collector of fast recovery diode D 2m-1 Is connected in series with an energy storage capacitor C m Post-connected to solid state switch S k-4 M=2, 3, …, n, k=m-1.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-1 Collector of solid state switch S m-1 Emitter series solid state switch S m-3 Collector of solid state switch S m-3 Emitter series fast recovery diode D 2m Cathode of fast recovery diode D 2m Is connected to the solid state switch S k-4 Is provided.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-2 Collector of solid state switch S m-2 Emitter series solid state switch S m-4 Collector of solid state switch S m-4 Emitter series fast recovery diode D 2m Is provided.
The solid-state switch S x-i IGBT switches are adopted, the grid electrodes are suspended, and i=1, 2,3,4, x=1, 2, … and n.
The solid-state switch S x-i Is connected in series with the collector diode D x-i Cathode of solid state switch S x-i Emitter series diode D of (c) x-i Is a positive electrode of (a).
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Exciting winding L of pulse transformer m And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Inductance L 1 And the rear is grounded.
Inductance L 2 And inductance L 1 The corresponding primary and secondary windings are respectively equivalent transformation ratio inductances and the inductance L is recorded 2 One end of the (C) is the C end, and the other end is the D end.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Secondary distributed capacitance C of pulse transformer d2 And then connected to the D terminal.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Load R L And then connected to the D terminal.
Further, the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection further comprises a man-machine interaction interface.
The man-machine interaction interface is used for generating a switch control instruction and transmitting the switch control instruction to the control signal generation module.
The control signal generation module receives the switch control instruction and generates a switch control signal.
Further, the working process of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection comprises a parallel charging process and a serial discharging process.
Further, when the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection works in the parallel charging process, the solid-state switch S x-i All are in the off state, the fast recovery diode D j All are in a conducting state, and the direct current power supply Vdc passes through the fast recovery diode D j To the energy storage capacitor C x Charging and then storing the energy capacitor C x Is of amplitude V DC ，j＝1，2，…，2n。
Further, when the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection works in the series discharging process, the solid-state switch S x-i All are in a conducting state, solid state switch S x-i Voltage across the diode decreases, fast recovery diode D j Are all in an off state. Energy storage capacitor C x Is applied to a load R L The input voltage amplitude obtained by the pulse transformer module is V 0 ＝n*V DC . The pulse transformer module is boosted by the pulse transformer and then is used for loading R L The voltage amplitude of the upper output is V=N×V 0 ＝N*n*V DC N is the transformation ratio of the pulse transformer.
Furthermore, the pulse width, the pulse frequency and the pulse amplitude of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection are all adjustable.
The invention provides a high-voltage pulse generating device based on the combination of an IGBT series-parallel all-solid-state Marx generator and a pulse transformer, which can realize the output of ultra-high pulse voltage. The invention realizes the improvement of the current capacity and the voltage-withstanding capacity of the Marx generator through the IGBT series-parallel connection, and ensures the reliable operation of the high-voltage pulse generating device.
The beneficial effects of the invention include:
1. the mixed use of all-solid-state switches of the all-solid-state Marx generator based on the IGBT series-parallel connection can realize the output of large current and high voltage of the Marx generator, and ensure that the high-voltage pulse generating device reliably outputs ultra-high pulse voltage.
2. The output voltage, width and pulse frequency of the high-voltage pulse generator are flexibly adjustable.
Drawings
FIG. 1 is a schematic diagram of the various modules of the present invention;
FIG. 2 is an all-solid-state Marx generator circuit topology based on IGBT series-parallel connection;
FIG. 3 is a schematic diagram of a charge mode circuit of an all-solid-state Marx generator based on IGBT series-parallel connection;
FIG. 4 is a schematic diagram of a discharge mode circuit of an all-solid-state Mrax generator based on IGBT series-parallel connection;
fig. 5 is a waveform of output voltage and current of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection.
Detailed Description
The present invention is further described below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.
Example 1:
referring to fig. 1 to 5, a high voltage pulse generating device based on all-solid-state switch series-parallel connection includes: the system comprises a control signal generation module, a solid-state switch driving circuit module, an all-solid-state MARX generator module, a pulse transformer module and a load.
The control signal generation module is used for generating a switch control signal.
And after receiving the switch control signal, the solid-state switch driving circuit module controls the on and off of each switch tube in the all-solid-state MARX generator module and the time of the on and off.
The all-solid-state MARX generator module is configured to provide a low voltage output signal to the pulse transformer module.
The all-solid-state MARX generator module includes n cascaded MARX circuits.
The pulse transformer module converts the low voltage output signal into a high voltage pulse and inputs the high voltage pulse into a load.
The circuit topology of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection is as follows:
the positive electrode of the DC power supply Vdc is denoted as an A end, the negative electrode is denoted as a B end, and the B end is grounded.
The A end is connected in series with a fast recovery diode D 1 Fast recovery diode D 1 Is connected in series with an energy storage capacitor C 1 And then connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-1 Collector of solid state switch S 1-1 Emitter series solid state switch S 1-3 Collector of solid state switch S 1-3 Emitter series fast recovery diode D 2 Cathode of fast recovery diode D 2 Is connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-2 Collector of solid state switch S 1-2 Emitter series solid state switch S 1-4 Collector of solid state switch S 1-4 Emitter series fast recovery diode D 2 Is provided.
The fast recovery diode D 2m-1 Anode series solid state switch S k-2 Collector of fast recovery diode D 2m-1 Is connected in series with an energy storage capacitor C m Post-connected to solid state switch S k-4 M=2, 3, …, n, k=m-1.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-1 Collector of solid state switch S m-1 Emitter series solid state switch S m-3 Collector of solid state switch S m-3 Emitter series fast recovery diode D 2m Cathode of fast recovery diode D 2m Is connected to the solid state switch S k-4 Is provided.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-2 Collector of solid state switch S m-2 Emitter series solid state switch S m-4 Collector of solid state switch S m-4 Emitter series fast recovery diode D 2m Is provided.
The solid-state switch S x-i IGBT switches are adopted, the grid electrodes are suspended, and i=1, 2,3,4, x=1, 2, … and n.
The solid-state switch S x-i Is connected in series with the collector diode D x-i Cathode of solid state switch S x-i Emitter series diode D of (c) x-i Is a positive electrode of (a).
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Exciting winding L of pulse transformer m And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Inductance L 1 And the rear is grounded.
Inductance L 2 And inductance L 1 The corresponding primary and secondary windings are respectively equivalent transformation ratio inductances and the inductance L is recorded 2 One end of the (C) is the C end, and the other end is the D end.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Secondary distributed capacitance C of pulse transformer d2 And then connected to the D terminal.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Load R L And then connected to the D terminal.
The all-solid-state MARX generator module comprises: DC power Vdc and solid-state switch S x-i Diode D x-i Fast recovery diode D j Energy storage capacitor C x Where j=1, 2, …,2n.
The pulse transformer module includes: resistor R i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 Exciting winding L of pulse transformer m Inductance L 1 Inductance L 2 Leakage inductance L of secondary winding of pulse transformer s2 Secondary distributed capacitance C of pulse transformer d2 。
The high-voltage pulse generating device based on the all-solid-state switch series-parallel connection further comprises a man-machine interaction interface.
The man-machine interaction interface is used for generating a switch control instruction and transmitting the switch control instruction to the control signal generation module.
The control signal generation module receives the switch control instruction and generates a switch control signal.
The working process of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection comprises a parallel charging process and a series discharging process.
When the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection works in the parallel charging process, the solid-state switch S x-i All are in the off state, the fast recovery diode D j All are in a conducting state, and the direct current power supply Vdc passes through the fast recovery diode D j To the energy storage capacitor C x Charging and then storing the energy capacitor C x Is of amplitude V DC ，j＝1，2，…，2n。
When the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection works in the series discharging process, the solid-state switch S x-i All are in a conducting state, solid state switch S x-i The voltage across the storage capacitor is continuously reduced by the solid-state switch S x-i Will quickly recover diode D j And (5) reversely cutting off. Fast recovery diode D j Are all in an off state. Equivalent series energy storage capacitor C x Is rapidly loaded to the load R L On all solid state switches S x-i When the pulse transformer is completely conducted, the primary side of the pulse transformer instantaneously obtains all series energy storage capacitor voltages, and the input voltage amplitude obtained by the pulse transformer module is V 0 ＝n*V DC . The pulse transformer module is boosted by the pulse transformer and then is used for loading R L The voltage amplitude of the upper output is V=N×V 0 ＝N*n*V DC N is the transformation ratio of the pulse transformer.
The pulse width, the pulse frequency and the pulse amplitude of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection are all adjustable.
The device is suitable for outputting high pulse high voltage and large current application requirements, and can output pulse voltage with the amplitude reaching 200 KV.
Example 2:
referring to fig. 1 to 5, a high voltage pulse generating device based on all-solid-state switch series-parallel connection includes: the system comprises a control signal generation module, a solid-state switch driving circuit module, an all-solid-state MARX generator module, a pulse transformer module and a load.
The control signal generation module is used for generating a switch control signal.
And after receiving the switch control signal, the solid-state switch driving circuit module controls the on and off of each switch tube in the all-solid-state MARX generator module and the time of the on and off.
The all-solid-state MARX generator module is configured to provide a low voltage output signal to the pulse transformer module.
The all-solid-state MARX generator module includes n cascaded MARX circuits.
The pulse transformer module converts the low voltage output signal into a high voltage pulse and inputs the high voltage pulse into a load.
The circuit topology of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection is as follows:
the positive electrode of the DC power supply Vdc is denoted as an A end, the negative electrode is denoted as a B end, and the B end is grounded.
The A end is connected in series with a fast recovery diode D 1 Fast recovery diode D 1 Is connected in series with an energy storage capacitor C 1 And then connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-1 Collector of solid state switch S 1-1 Emitter series solid state switch S 1-3 Collector of solid state switch S 1-3 Emitter series fast recovery diode D 2 Cathode of fast recovery diode D 2 Is connected to the B terminal.
The fast recovery diode D 1 Cathode series solid state switch S 1-2 Collector of solid state switch S 1-2 Emitter series solid state switch S 1-4 Collector of solid state switch S 1-4 Emitter series fast recovery diode D 2 Is provided.
The fast recovery diode D 2m-1 Anode series solid state switch S k-2 Collector of fast recovery diode D 2m-1 Is connected in series with an energy storage capacitor C m Post-connected to solid state switch S k-4 M=2, 3, …, n, k=m-1.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-1 Collector of solid state switch S m-1 Emitter series solid state switch S m-3 Collector of solid state switch S m-3 Emitter series fast recovery diode D 2m Cathode of fast recovery diode D 2m Is connected to the solid state switch S k-4 Is provided.
The fast recovery diode D 2m-1 Cathode series solid state switch S m-2 Collector of solid state switch S m-2 Emitter series solid state switch S m-4 Collector of solid state switch S m-4 Emitter series fast recovery diode D 2m Is provided.
The solid-state switch S x-i IGBT switches are adopted, the grid electrodes are suspended, and i=1, 2,3,4, x=1, 2, … and n.
The solid-state switch S x-i Is connected in series with the collector diode D x-i Cathode of solid state switch S x-i Emitter series diode D of (c) x-i Is a positive electrode of (a).
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Excitation of pulse transformerWinding L m And the rear is grounded.
The solid-state switch S n-4 The emitter of (a) is sequentially connected with a resistor R in series i Primary leakage inductance L of pulse transformer s1 Inductance L 1 And the rear is grounded.
Inductance L 2 And inductance L 1 The corresponding primary and secondary windings are respectively equivalent transformation ratio inductances and the inductance L is recorded 2 One end of the (C) is the C end, and the other end is the D end.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Secondary distributed capacitance C of pulse transformer d2 And then connected to the D terminal.
The C end is sequentially connected with the leakage inductance L of the secondary winding of the pulse transformer in series s2 Load R L And then connected to the D terminal.
The all-solid-state MARX generator module comprises: DC power Vdc and solid-state switch S x-i Diode D x-i Fast recovery diode D j Energy storage capacitor C x Where j=1, 2, …,2n.
The pulse transformer module includes: resistor R i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 Exciting winding L of pulse transformer m Inductance L 1 Inductance L 2 Leakage inductance L of secondary winding of pulse transformer s2 Secondary distributed capacitance C of pulse transformer d2 。
Example 3:
the embodiment 2 of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection is mainly seen, and the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection further comprises a human-computer interaction interface.
The man-machine interaction interface is used for generating a switch control instruction and transmitting the switch control instruction to the control signal generation module.
The control signal generation module receives the switch control instruction and generates a switch control signal.
Example 4:
the embodiment 2 is mainly seen as the working process of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection, which comprises a parallel charging process and a series discharging process.
Example 5:
high-voltage pulse generating device based on all-solid-state switch series-parallel connection is mainly shown in embodiment 4, and when the high-voltage pulse generating device based on all-solid-state switch series-parallel connection works in the parallel charging process, the solid-state switch S x-i All are in the off state, the fast recovery diode D j All are in a conducting state, and the direct current power supply Vdc passes through the fast recovery diode D j To the energy storage capacitor C x Charging and then storing the energy capacitor C x Is of amplitude V DC ，j＝1，2，…，2n。
Example 6:
high-voltage pulse generating device based on all-solid-state switch series-parallel connection is mainly shown in embodiment 4, and when the high-voltage pulse generating device based on all-solid-state switch series-parallel connection works in a series discharging process, the solid-state switch S x-i All are in a conducting state, solid state switch S x-i The voltage across the storage capacitor is continuously reduced by the solid-state switch S x-i Will quickly recover diode D j And (5) reversely cutting off. Fast recovery diode D j Are all in an off state. Equivalent series energy storage capacitor C x Is rapidly loaded to the load R L On all solid state switches S x-i When the pulse transformer is completely conducted, the primary side of the pulse transformer instantaneously obtains all series energy storage capacitor voltages, and the input voltage amplitude obtained by the pulse transformer module is V 0 ＝n*V DC . The pulse transformer module is boosted by the pulse transformer and then is used for loading R L The voltage amplitude of the upper output is V=N×V 0 ＝N*n*V DC N is the transformation ratio of the pulse transformer.
Example 7:
a high-voltage pulse generating device based on all-solid-state switch series-parallel connection is mainly disclosed in embodiment 2, and the pulse width, the pulse frequency and the pulse amplitude of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection are all adjustable.
The device is suitable for outputting high pulse high voltage and large current application requirements, and can output pulse voltage with the amplitude reaching 200 KV.
Example 8:
high-voltage pulse generating device based on all-solid-state switch series-parallel connection, the content includes: the device is suitable for outputting high pulse high voltage and large current application requirements, can output pulse voltage with the amplitude reaching 200KV, and can also output high-voltage pulse generating devices with the pulse width, the pulse frequency and the pulse amplitude.
Referring to fig. 1, the components of the high voltage pulse generator are shown.
Referring to fig. 2, a circuit principle topology of the high voltage pulse generating device is shown. D (D) 1 ～D n Is a fast recovery diode; c is an energy storage capacitor; s is S 1-i ～S n-i Is a solid state switch; l (L) s1 Primary leakage inductance of the pulse transformer; c (C) d1 Distributing capacitance for the primary winding of the pulse transformer; l (L) m Exciting a winding for the pulse transformer; l (L) 1 ，L 2 An inductor with an equivalent transformation ratio for the primary winding and the secondary winding; l (L) s2 Leakage inductance of a secondary winding of the pulse transformer; c (C) d2 A distributed capacitance for the secondary of the pulse transformer; r is R L Is a load.
Referring to fig. 3, during parallel charging, all solid-state switches S 1-i ～S n-i (i=1, 2,3, 4) in the off state, fast recovery diode D 1 ～D n In a conducting state, the direct current power supply passes through D 1 Charge capacitor C 1 ～C n Charged to the DC power supply voltage V DC 。
Referring to fig. 4, during series discharge, all solid state switches S 1-i ～S n-i Simultaneously conducting, the voltage at two ends of the capacitor is continuously reduced, and the voltage at two ends of the capacitor passes through the solid switch S 1-i ～S n-i Will quickly recover diode D 1 ～D n And (5) reversely cutting off. The equivalent series energy storage capacitor voltage is rapidly loaded on the load, when all solid state switches S 1-i ～S n-i When the pulse transformer is fully conducted, the primary side of the pulse transformer instantaneously obtains all series energy storage capacitor voltages V 0 Wherein V is 0 ＝n*V DC . The transformation ratio of the pulse transformer is N, the pulse transformer is used for boosting, and finally the pulse transformer is used for loading R L The end outputs pulse voltage with output amplitude of V=N×V 0 ＝N*n*V DC 。
Referring to fig. 5, the actual test output voltage and current waveforms of the present invention are shown.
By combining the figures 1-5, the high-voltage pulse generating device provided by the invention can output the pulse voltage of 200KV at the highest, and the pulse width, the pulse frequency and the pulse amplitude can be flexibly adjusted.
Claims (6)
1. High voltage pulse generating device based on full solid state switch series-parallel connection, characterized by comprising: the system comprises a control signal generation module, a solid-state switch driving circuit module, an all-solid-state MARX generator module, a pulse transformer module and a load;
the control signal generation module is used for generating a switch control signal;
after receiving the switch control signal, the solid switch driving circuit module controls the on and off of each switch tube in the all-solid MARX generator module and the time of the on and off;
the all-solid-state MARX generator module is used for providing a low-voltage output signal for the pulse transformer module;
the all-solid-state MARX generator module includes n cascaded MARX circuits;
the pulse transformer module converts the low-voltage output signal into high-voltage pulses and inputs the high-voltage pulses to a load;
the circuit topology of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection is as follows:
recording that one end of a direct current power supply Vdc where a positive electrode is positioned is an A end, one end of a negative electrode is positioned is a B end, and the B end is grounded;
the end A is connected with a fast recovery diode D 1 Fast recovery diode D 1 Is connected with the energy storage capacitor C 1 And then connected to the B end;
the fast recovery diode D 1 Cathode of (2) is connected with solid-state switch S 1-1 Collector of solid state switch S 1-1 Emitter-connected solid-state switch S 1-3 Collector of solid state switch S 1-3 Emitter-connected fast recovery diode D 2 Cathode of fast recovery diode D 2 Is connected to the B terminal;
the fast recovery diode D 1 Cathode of (2) is connected with solid-state switch S 1-2 Collector of solid state switch S 1-2 Emitter-connected solid-state switch S 1-4 Collector of solid state switch S 1-4 Emitter-connected fast recovery diode D 2 A cathode of (a);
the fast recovery diode D 2m-1 Anode-connected solid state switch S k-2 Collector of fast recovery diode D 2m-1 Is connected with the energy storage capacitor C m Post-connected to solid state switch S k-4 M=2, 3, …, n, k=m-1;
the fast recovery diode D 2m-1 Cathode of (2) is connected with solid-state switch S m-1 Collector of solid state switch S m-1 Emitter-connected solid-state switch S m-3 Collector of solid state switch S m-3 Emitter-connected fast recovery diode D 2m Cathode of fast recovery diode D 2m Is connected to the solid state switch S k-4 An emitter of (a);
the fast recovery diode D 2m-1 Cathode of (2) is connected with solid-state switch S m-2 Collector of solid state switch S m-2 Emitter-connected solid-state switch S m-4 Collector of solid state switch S m-4 Emitter-connected fast recovery diode D 2m A cathode of (a);
the solid-state switch S x-i IGBT switches are adopted, the grid electrodes are suspended, i=1, 2,3,4, x=1, 2, … and n;
the solid-state switch S x-i Is connected to the collector of diode D x-i Cathode of solid state switch S x-i Emitter-connected diode D x-i An anode of (a);
the solid-state switch S n-4 The emitter of (a) is connected with the resistor R in turn i Primary leakage inductance L of pulse transformer s1 Distributed capacitance C of primary winding of pulse transformer d1 Rear ground;
exciting winding L of pulse transformer m Distributed capacitor C connected in parallel with primary winding of pulse transformer d1 Is provided;
inductance L 1 Distributed capacitor C connected in parallel with primary winding of pulse transformer d1 Both ends;
inductance L 2 And inductance L 1 The corresponding primary and secondary windings are respectively equivalent transformation ratio inductances and the inductance L is recorded 2 One end of the first part is a C end, and the other end is a D end;
the C end is sequentially connected with leakage inductance L of the secondary winding of the pulse transformer s2 Secondary distributed capacitance C of pulse transformer d2 And then connected to the D end;
the load R L Parallel connected with secondary distributed capacitor C of pulse transformer d2 Is provided.
2. The high-voltage pulse generating device based on the all-solid-state switch series-parallel connection according to claim 1, wherein the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection further comprises a human-computer interaction interface;
the man-machine interaction interface is used for generating a switch control instruction and transmitting the switch control instruction to the control signal generation module;
the control signal generation module receives the switch control instruction and generates a switch control signal.
3. The high-voltage pulse generating device based on the all-solid-state switch series-parallel connection according to claim 1, wherein the working process of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection comprises a parallel charging process and a series discharging process.
4. A high voltage pulse generating device based on all-solid state switch series-parallel connection as claimed in claim 3, wherein said solid state switch S when said high voltage pulse generating device based on all-solid state switch series-parallel connection is operated in parallel charging process x-i All are in the off state, the fast recovery diode D j All are in a conducting state, and the direct current power supply Vdc passes through the fast recovery diode D j To the energy storage capacitor C x Charging and then storing the energy capacitor C x Is of amplitude V DC ，j=1，2，…，2n；i=1，2，3，4；x=1，2，…，n。
5. A high voltage pulse generating device based on all-solid state switch series-parallel connection as claimed in claim 3, wherein said solid state switch S when said high voltage pulse generating device based on all-solid state switch series-parallel connection is operated in series discharge process x-i All are in a conducting state, solid state switch S x-i Voltage across the diode decreases, fast recovery diode D j All are in the off state, the energy storage capacitor C x Is applied to a load R L The input voltage amplitude obtained by the pulse transformer module is V 0 =n*V DC J=1, 2, …,2n; i=1, 2,3,4; x=1, 2, …, n; the pulse transformer module is boosted by the pulse transformer and then is used for loading R L The voltage amplitude of the upper output is V=N×V 0 =N*n*V DC N is the transformation ratio of the pulse transformer.
6. The high-voltage pulse generating device based on the all-solid-state switch series-parallel connection according to claim 1, wherein the pulse width, the pulse frequency and the pulse amplitude of the high-voltage pulse generating device based on the all-solid-state switch series-parallel connection are all adjustable.
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