An integrated electromagnetic driven pulse power supply

Abstract

The present invention discloses an integrated electromagnetic drive pulse power supply, comprising: a high-voltage charging module, a pulse compression drive module electrically connected to the high-voltage charging module, a comprehensive control module communicatively connected to the pulse compression drive module, and an output module electrically connected to the output end of the pulse compression drive module, wherein the comprehensive control module comprises: a host computer, a DSP control unit and a monitoring unit communicatively connected to the host computer and the pulse compression drive module respectively; wherein the host computer, the DSP control unit, the monitoring unit and the pulse compression drive module are all connected by optical fiber communication. By adopting DSP integrated control and optical fiber communication, the present invention significantly reduces the electromagnetic interference problem caused by the electrical connection between devices, and significantly enhances the stability of the power electronic system in a complex electromagnetic environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of pulse power, and more specifically, relates to an integrated electromagnetic driven pulse power supply. Background Art

[0002] High-power pulse power technology involves many cutting-edge fields, such as particle beams, strong lasers, controlled nuclear fusion, electromagnetic emission, lightning electromagnetic pulse simulation, electromagnetic forming, electromagnetic seismic source, high-power microwave, nuclear explosion simulation, etc. The main principle of pulse power technology is to slowly accumulate energy at a lower power, and then instantly release high power and large energy. It has the significant characteristics of high voltage, high current and short pulses. At the same time, it requires the system structure to be easy to match impedance, and the pulse width of the discharge current waveform is adjustable and controllable.

[0003] Typical energy storage methods include electric field, magnetic field, inertia and electrochemical technology. The energy storage systems based on these four energy storage methods are capacitor energy storage, inductor energy storage, AC generator energy storage and chemical battery energy storage. The pulse power energy storage system should have high energy storage density and high power density, and require good controllability of the discharge waveform and small internal impedance to meet the needs of different loads. At the same time, it requires good pulse repeatability and simple system structure.

[0004] The existing device has a system that is highly sensitive to external input signals. If the input signal is unstable, it will affect the reliability of the entire system and the stability of the system under high current. The current equipment operation process is too complicated.

[0005] For example, a high-voltage pulse power supply disclosed in patent application number CN202410507403.9 proposes a new type of high-voltage pulse power supply in view of the shortcomings of traditional high-voltage pulse power supplies in treating diseased cells in the medical field. The invention aims to provide a precise and controllable high-voltage pulse output by designing a modulation circuit, a DC power supply, a detection module and a processing module to effectively treat cancer cells without damaging surrounding normal cells. Specifically, the modulation circuit is composed of multiple pulse circuit units, the DC power supply can adjust the current according to the input signal, the detection module is used to monitor the voltage fluctuation in real time, and the processing module can generate a floating correction instruction to ensure the stability of the output voltage. This invention also has some shortcomings. First, the control mechanism of the overall system is relatively complex, and the operator needs to have certain professional knowledge and skills to ensure the correct use of the power supply. Secondly, the system is highly sensitive to external input signals. If the input signal is unstable, it will affect the reliability of the overall system.

[0006] Or as disclosed in patent application number CN202311576853.5, a pulse power supply circuit based on capacitor output is introduced, which aims to improve the various problems encountered by traditional power supply circuits when large current is output, especially in high-power application scenarios. The core of this invention is to optimize the use of energy storage capacitors through reasonable circuit design, thereby improving the stability and safety of the circuit. Specifically, this pulse power supply circuit consists of an energy storage capacitor C1, a circuit breaker module, a control module and a load module. Among them, the circuit breaker module includes a first RC component, a diode D3 and an IGBT tube D1, which is responsible for effectively protecting circuit components during high current output to avoid equipment damage caused by excessive current. The control module adjusts the output current by precisely controlling the state of the IGBT to ensure the reliable operation of the system. This invention is particularly suitable for occasions with high current (such as 5000A) output, and aims to improve the safety and performance of the circuit. This invention also has some shortcomings. First, although the circuit design is intended to improve stability, it may still face high requirements for IGBTs when outputting large currents, which means that the circuit still needs to carefully consider the selection and matching of components in actual applications to ensure that it performs well under extreme conditions. Secondly, the complexity of the circuit breaker module may increase the failure points of the system, especially when the current changes rapidly. Controlling and ensuring the safety of the circuit requires high-precision components and effective control strategies. Furthermore, the performance stability of the circuit under high electrical load conditions still needs to be proven by a large number of experiments to ensure its reliability and effectiveness in real-world applications.

[0007] For example, a fast high-frequency high-voltage pulse power supply circuit and implementation method disclosed in patent application number CN201911306461.0 aims to achieve fast output and high operating frequency of high-voltage pulses by adopting multiple modular designs. The main features of this power supply circuit include a high-voltage pulse amplitude range of 0 to 5KV, a high-frequency output of up to 10KHZ, a minimum pulse width of 1μs, and a fast response conversion speed (the rise and fall time can be up to 1μs at the fastest). The design adopts a symmetrical square wave output and an alternating conduction mechanism to increase the conduction and cutoff speed of the switch tube, thereby reducing energy loss and improving power efficiency. In addition, the circuit clearly proposes the application potential of providing high-voltage pulse power supply for high-tech fields such as modern industry and medical care. This power supply circuit also has some disadvantages and limitations. First, the complexity of the circuit increases the difficulty of debugging and maintenance, and requires operators to have strong professional knowledge, otherwise it may affect the test efficiency and accuracy. Secondly, the high dependence on the input trigger signal makes the system prone to abnormalities when the signal is unstable, which in turn affects the reliability of the high-voltage output. In addition, the matching requirements of the components are relatively stringent. If the matching is improper, the power supply may be unstable during high-voltage operation. In addition, under high-frequency and high-voltage working conditions, the heat dissipation and energy efficiency of power components also need to be given full attention, which may affect the long-term stability of the equipment.

[0008] For example, a pulse power supply, power test system and control method disclosed in patent application number CN202410814997.8 introduces a new type of pulse power supply and its control method, which is specifically used for power testing of IGBT modules. The core of this invention is the introduction of a multi-channel voltage-controlled current source module, which significantly broadens the output current range of the pulse power supply, and can reach the maximum kA level, meeting the needs of high-power electronic device testing. The pulse power supply structure consists of a main control unit, a power module, a parallel multi-channel voltage-controlled current source and a load. Through real-time monitoring and feedback control, the system can adjust the output current according to the multi-channel voltage sampling signal to improve the efficiency and accuracy of the test. In addition, the newly added energy storage element in the design can release the necessary instantaneous energy when the pulse current is output, thereby maintaining the stability of the test. This invention also has some disadvantages. First, although the system expands the test range, it also increases the complexity of the design and requires a higher level of technical support and control. The complex system structure may make debugging and maintenance more difficult, thereby increasing the technical threshold and potential failure points of operation in practice. Secondly, the reliability of the system still needs to be further verified, especially during the test process of connecting to high current and high voltage, which may face the risk of component damage and unstable performance. Summary of the invention

[0009] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0010] In order to achieve these purposes and other advantages of the present invention, an integrated electromagnetic driven pulse power supply is provided, comprising: a high-voltage charging module, a pulse compression driving module electrically connected to the high-voltage charging module, an integrated control module communicatively connected to the pulse compression driving module, and an output module electrically connected to the output end of the pulse compression driving module, wherein the integrated control module comprises: a host computer, a DSP control unit and a monitoring unit communicatively connected to the host computer and the pulse compression driving module respectively;

[0011] Wherein, optical fiber is used for transmission among the host computer, DSP control unit, monitoring unit and pulse compression drive module.

[0012] Preferably, the high-voltage charging module includes: a soft-start circuit connected to an external power supply, a three-phase uncontrolled rectifier filter circuit connected to the output end of the soft-start circuit, a resonant inverter circuit connected to the output end of the three-phase uncontrolled rectifier filter circuit, a high-frequency boost rectifier circuit connected to the output end of the resonant inverter circuit, and a control circuit arranged between the output end of the three-phase uncontrolled rectifier filter circuit and the output end of the high-frequency boost rectifier circuit;

[0013] The output signal of the control circuit is connected to the resonant inverter circuit for communication, and the output end of the high-frequency boost rectifier circuit is electrically connected to the output module.

[0014] Preferably, the control circuit comprises: a detection unit I connected to the output end of the three-phase uncontrolled rectifier and filter circuit to monitor the voltage and current at the output end of the three-phase uncontrolled rectifier and filter circuit;

[0015] A control board connected to the output terminal of the voltage and current detection unit;

[0016] A detection unit II connected to the output end of the high-frequency boost rectifier circuit to monitor the voltage and current at the output end of the high-frequency boost rectifier circuit;

[0017] The output end of the detection unit II is electrically connected to the control board;

[0018] The output end of the control board is electrically connected to the input end of the resonant inverter circuit, and the control board is communicatively connected to the DSP control unit.

[0019] Preferably, the pulse compression drive module comprises: a modulation circuit formed by a plurality of pulse modulation units connected in parallel, an energy dissipation unit and a charging isolation unit respectively connected to the input end of each pulse modulation unit, and the output end of the modulation circuit is connected to the input end of the output module.

[0020] Preferably, the pulse capacitor in the pulse modulation unit is formed by two identical capacitors connected in parallel or in series, and switches to different working modes by receiving an output signal of the DSP control unit.

[0021] The present invention includes at least the following beneficial effects: through integrated design, each module can be efficiently integrated together, thereby solving the problems of space waste and complex connection caused by scattered components in traditional power supply systems. This design simplifies the overall architecture, making the system more compact and stable, and reduces the difficulty of installation and maintenance, improving the reliability and adaptability of the system. By adopting optical fiber communication, the integrated electromagnetic drive pulse power supply significantly reduces the electromagnetic interference problem caused by the electrical connection between devices, and significantly enhances the stability of power electronic systems in complex electromagnetic environments.

[0022] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A connection block diagram of an integrated electromagnetic drive pulse power supply of the present invention;

[0024] Figure 2 It is a connection block diagram of the high-voltage charging module of the present invention;

[0025] Figure 3 is a block diagram of the pulse modulation unit;

[0026] Figure 4 This is the circuit diagram of serial port to optical fiber;

[0027] Figure 5 It is a relay switch control flow chart of the present invention;

[0028] Figure 6 This is a thyristor trigger control flow chart in the present invention;

[0029] Figure 7 It is the flow chart of online monitoring of voltage and current of the monitoring unit. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0031] Figure 1 An integrated electromagnetic driven pulse power supply of the present invention is shown, comprising: a high-voltage charging module, a pulse compression driving module electrically connected to the high-voltage charging module, an integrated control module communicatively connected to the pulse compression driving module, and an output module electrically connected to the output end of the pulse compression driving module, wherein the integrated control module comprises: a host computer, a DSP control unit and a monitoring unit communicatively connected to the host computer and the pulse compression driving module respectively;

[0032] Wherein, optical fiber is used for transmission among the host computer, DSP control unit, monitoring unit and pulse compression drive module.

[0033] Working principle:

[0034] The host computer sends instructions to the DSP control unit through optical fiber, including parameter requirements of pulse power (such as pulse width, amplitude, frequency, etc.) and system operation status requirements (such as start, stop, fault alarm, etc.). After receiving the instructions from the host computer, the DSP control unit decodes and processes them, and generates corresponding control signals according to the current state and target state of the system. These control signals are transmitted to the pulse compression drive module through optical fiber. After receiving the control signal from the DSP control unit, the pulse compression drive module adjusts the charging voltage and charging current of the high-voltage charging module and the parameters of the pulse compression circuit according to the requirements of the control signal to generate pulse power that meets the requirements. The monitoring unit monitors the operation status of the system in real time, including the voltage and current of the high-voltage charging module, the output waveform and parameters of the pulse compression drive module, the load status of the output module, etc. The monitoring unit transmits the real-time monitored data to the DSP control unit and the host computer through optical fiber for further processing and analysis. The control unit interacts with each unit device internally through the local data communication bus, and interacts with the host computer externally through the system communication control bus, thereby realizing remote monitoring and control of the entire pulse power system by personnel. The local data communication bus adopts the form of optical fiber serial port, and the system communication control bus adopts the form of optical fiber Ethernet. The entire communication control link adopts optical fiber transmission, which reduces the electrical connection between devices and isolates the conducted interference. The communication system has high reliability in a strong electromagnetic interference environment.

[0035] In the above scheme, the high-voltage charging module includes: a soft start circuit connected to an external power supply, a three-phase uncontrolled rectifier filter circuit connected to the output end of the soft start circuit, a resonant inverter circuit connected to the output end of the three-phase uncontrolled rectifier filter circuit, a high-frequency boost rectifier circuit connected to the output end of the resonant inverter circuit, and a control circuit arranged between the output end of the three-phase uncontrolled rectifier filter circuit and the output end of the high-frequency boost rectifier circuit;

[0036] Wherein, the output signal of the control circuit is connected to the resonant inverter circuit in communication, and the output end of the high-frequency boost rectifier circuit is electrically connected to the output module. With this technical solution, the buffer soft start circuit is used to limit the surge current when the system is powered on to reduce the impact of the power supply startup on the power grid. It is implemented by a time-delay contactor in parallel. The three-phase uncontrolled rectifier filter circuit provides a stable DC power supply for the resonant inverter circuit, which requires a low ripple factor and is implemented by a three-phase uncontrolled rectifier and LC filter circuit. The resonant inverter circuit refers to a combination of an inverter circuit and a resonant circuit. The function of the inverter circuit is to invert the DC power of the previous stage into a high-frequency AC power. The resonant circuit is a power-limited LC series resonance mode. The high-frequency boost rectifier circuit includes two parts: a high-frequency transformer and a high-voltage rectifier circuit. The function of the high-frequency transformer is to raise the inverter voltage to meet the charging voltage requirements and solve the isolation problem of high-voltage charging and power supply. The high-voltage rectifier circuit rectifies the high-frequency AC current into a DC current with a constant average value to charge the load capacitor.

[0037] In the above scheme, the control circuit includes: a detection unit I connected to the output end of the three-phase uncontrolled rectifier filter circuit to monitor the voltage and current at the output end of the three-phase uncontrolled rectifier filter circuit; a control board connected to the output end of the voltage and current detection unit; a detection unit II connected to the output end of the high-frequency boost rectifier circuit to monitor the voltage and current at the output end of the high-frequency boost rectifier circuit; the output end of the detection unit II is electrically connected to the control board; wherein the output end of the control board is electrically connected to the input end of the resonant inverter circuit, and the control board is connected to the DSP control unit for communication. With this technical scheme, the detection unit I is used to monitor the voltage and current signals of the three-phase uncontrolled rectifier filter circuit, and the detection unit II can provide the control board with electrical parameter feedback information of the resonant branch and the charging branch during the power supply charging process, thereby ensuring that the control board generates correct control logic and drive signals, and realizing closed-loop control of capacitor charging.

[0038] In the above scheme, the pulse compression drive module includes: a modulation circuit composed of multiple pulse modulation units in parallel, an energy dissipation unit and a charging isolation unit respectively connected to the input end of each pulse modulation unit, and the output end of the modulation circuit is connected to the input end of the output module. Using this technical solution, the pulse modulation unit includes a pulse capacitor, a thyristor, a diode and a current sensor respectively connected to the output end of the pulse capacitor, the output end of the thyristor is connected to a trigger protection unit, the output end of the diode is connected to a protection unit, the output ends of the trigger protection unit and the protection unit are both connected to the input end of the modulation inductor, the output ends of the modulation inductor wave and the current sensor are connected to the high current output interface, and each pulse modulation unit is controlled by the integrated control module, discharges at the same time or discharges in sequence to form the required synthetic pulse high voltage and high current waveform. The energy dissipation unit can realize the safe discharge of energy in the pulse shaping network, which is mainly used for energy release in the case of fault or non-discharge to ensure the safety of people and equipment. The charging isolation unit can realize the simultaneous charging of multiple pulse power supply modules of the pulse shaping network, and can effectively isolate the fault in the charging process of a single pulse power supply module to avoid the spread of faults.

[0039] In the above scheme, the pulse capacitor in the pulse modulation unit is formed by connecting two identical capacitors in parallel or in series, and switches different working modes by receiving the output signal of the DSP control unit. With this technical scheme, when the rated working voltage of the pulse modulation unit needs to be increased, the external copper bars of the two capacitors in the pulse modulation unit are connected in series through the signal sent by the DSP control unit, and the working voltage is doubled.

[0040] The DSP control unit uses a DSP device controller to implement high-voltage charging, relay switch action, thyristor triggering, voltage and current measurement and other modules to ensure the reliability and stability of the control system. The DSP chip of the DSP device controller is the control core, and its DSP chip is a 32-bit model TMS320F2812 chip, and its functions are as follows:

[0041] 1. It has 6 groups of 56 general I / O ports, namely PA group, PB group, PD group, PE group, PF group and PG group. Most of the I / O ports can be set as input and output ports of digital signals or used as interfaces of on-chip peripherals through the register GPIO MUX;

[0042] 2. It has three 32-bit CPU timers and three external interrupts, and the number of external interrupts can be increased through expansion modules;

[0043] 3. Two asynchronous communication serial interfaces SCI are provided. Both SCI interfaces support 16-level receive / transmit FIFO as well as half-duplex communication and full-duplex communication.

[0044] In the integrated electromagnetic drive pulse power supply, the high-voltage charging module is used to charge the pulse capacitor, while the DSP chip realizes the control functions such as voltage setting of the high-voltage charging module. Since the communication interface of the high-voltage charging module is in the form of optical signal transmission, the DSP chip also needs to be connected to the high-voltage charging module through a serial port to optical fiber module. The serial port to optical fiber module uses the level conversion chip MAX3232CSE, and its circuit structure is shown in the figure. Figure 4 The level conversion chip is designed according to the standard serial port of RS232. The 10th pin T2IN and the 9th pin R2OUT of the level conversion chip are a pair of receiving and transmitting pins, and the optical fiber converters HRBR-2412 and HFBR-1412 realize the communication of serial port to optical fiber by receiving and sending signals respectively.

[0045] The DSP chip I / O port is connected to the switch control module to realize the control of the output relay switch opening or closing. After the output relay switch is actuated, the switch status at this time is fed back to the control computer through the DSP chip. The process is as follows Figure 5 shown.

[0046] After receiving the discharge command from the host computer, the DSP chip controls the triggering action of the thyristor switch. The rated voltage VDSM of the thyristor switch is 6.5kV, and the surge current ITSM is 120kA. Considering the influence of electromagnetic interference, the thyristor switch adopts the form of indirect light triggering. The trigger signal is converted into an optical signal after passing through the electro-optical conversion circuit, and then the optical splitter converts the optical signal into eight identical optical pulse signals, which are then transmitted through optical fiber and the optoelectronic conversion circuit to act on the eight thyristor switches. The trigger control process is as follows Figure 6 shown.

[0047] The monitoring unit is mainly composed of voltage and current sensors, environmental parameter sensors (such as voltage dividers and) and multi-channel signal acquisition and processing units, which can monitor various electrical parameters and environmental parameters during system operation. The monitoring unit uses the F2812 model DSP chip and the analog-to-digital conversion chip AD7606-4. The voltage divider and Rogowski coil are connected to the analog-to-digital conversion chip AD7606-4 through filtering and voltage follower circuits and integration circuits respectively. The DSP chip of the monitoring unit is connected to the host computer through the network port communication module to jointly realize Figure 7 Online monitoring of voltage and current in the system.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An integrated electromagnetic driven pulse power supply, comprising: A high-voltage charging module, a pulse compression driving module electrically connected to the high-voltage charging module, an integrated control module communicatively connected to the pulse compression driving module, and an output module electrically connected to the output end of the pulse compression driving module, wherein the integrated control module comprises: a host computer, a DSP control unit and a monitoring unit communicatively connected to the host computer and the pulse compression driving module respectively; The host computer, DSP control unit, monitoring unit and pulse compression drive module are all connected by optical fiber communication.

2. The integrated electromagnetic drive pulse power supply according to claim 1, characterized in that: The high-voltage charging module includes: a soft-start circuit connected to an external power supply, a three-phase uncontrolled rectifier filter circuit connected to the output end of the soft-start circuit, a resonant inverter circuit connected to the output end of the three-phase uncontrolled rectifier filter circuit, a high-frequency boost rectifier circuit connected to the output end of the resonant inverter circuit, and a control circuit arranged between the output end of the three-phase uncontrolled rectifier filter circuit and the output end of the high-frequency boost rectifier circuit; The output signal of the control circuit is connected to the resonant inverter circuit for communication, and the output end of the high-frequency boost rectifier circuit is electrically connected to the output module.

3. The integrated electromagnetic drive pulse power supply according to claim 2, characterized in that: The control circuit comprises: a detection unit I connected to the output end of the three-phase uncontrolled rectifier filter circuit to monitor the voltage and current at the output end of the three-phase uncontrolled rectifier filter circuit; A control board connected to the output terminal of the voltage and current detection unit; A detection unit II connected to the output end of the high-frequency boost rectifier circuit to monitor the voltage and current at the output end of the high-frequency boost rectifier circuit; The output end of the detection unit II is electrically connected to the control board; The output end of the control board is electrically connected to the input end of the resonant inverter circuit, and the control board is communicatively connected to the DSP control unit.

4. The integrated electromagnetic drive pulse power supply according to claim 1, characterized in that: The pulse compression driving module comprises: a modulation circuit formed by a plurality of pulse modulation units connected in parallel, an energy dissipation unit and a charging isolation unit respectively connected to the input end of each pulse modulation unit, and the output end of the modulation circuit is connected to the input end of the output module.

5. The integrated electromagnetic drive pulse power supply according to claim 4, characterized in that: The pulse capacitor in the pulse modulation unit is formed by connecting two identical capacitors in parallel or in series, and switches to different working modes by receiving the output signal of the DSP control unit.

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