| Compared with those pulse power supply system with capacitor or inductor energy storage mode,the inertial energy storage pulse power supply system possesses the advantages of high energy storage density and power density.Since it integrates the process of inertial energy storage and pulse forming,so the intermediate link from prime movers to electromagnetic load is reduced.It can also meet the fast repetition output for high power pulses.Therefore,the inertial energy storage pulse power supply systems have been widely used in the fields of national defence,industry and so on.Its typical application is serving as a high-power pulse power supply for electromagnetic launch system.At present,the pulse power supply system based on inertial energy storage has been widely and eagerly concerned by scholars at home and abroad.All countries are actively exploring and studying its core technologies in order to realize the practicality of this kind of power supply system.However,the application of the inertial energy storage pulse power supply is limited by the high electromagnetic parameters(high voltage,high current,high magnetic field)of the power system output.And since the single pulse output time of the pulse power supply is only a few milliseconds,it can be seemed that it fully operates in transient state.However,it is necessary to achieve the coordination and reliable work of each unit in the power system in such short time duration.Meanwhile the multichannel synchronous collection,analysis,storage and other work of discharge current,voltage and other data are also need to be accurately collected during this period.Ensuring the pulse power supply to operate in strict accordance with the control sequence,and realizing the functions of fault protection,on-site state detection,waveform reproduction,etc,all the factors above make the measurement and control system become one of the core part of the pulse power supply.The performance of the system can also directly affect the output performance and operation reliability of the pulse power supply system.Therefore,aimed at an inertial energy storage pulse power supply based on air-core pulse alternator,the research team proposes to develop the research and design of the measurement and control system for it.The research team found that traditional measurement and control systems used to adopt the architecture of DSP + PC.There exist many problems,such as lack of scalability and realtime,complex system programming,long development and debugging cycle,and low degree of system integration and intelligence.The scalability,real-time,integration and intelligence of are relatively low.In addtion,according to the current domestic and foreign literatures on the measurement and control system of pulse power supply systems,there are few researches on the measurement and control system of such high-power pulse power supply,which can be used for reference.Therefore,combined with the existing research foundation,the research team proposed the hardware system using ni-crio + PC architecture,software system using LabVIEW graphical programming method to carry out the design of an air core pulsed alternator power supply used in electromagnetic launch.Based on the research background above,the following researches have been carried out:Firstly,the mathematical models of the air-core pulse alternator and the electromagnetic railgun are introduced.Based on the development status at home and abroad,the suitable topological structure of the main circuit used for this pulse power supply system is proposed.Then,the simulation model of the whole power system is built.It provides the basis for the follow-up research on control strategies and the design of software and hardware of the measurement and control system.Then,according to different excitation and discharge control strategies,theoretical calculation and simulation analysis are carried out.The excitation and discharge control strategies of the pulse power supply system are proposed combined with the comprehensive consideration of the difficulty and reliability of practical operation.Afterwards,aimed at the measurement and control system based on NI-cRIO embedded control platform,the requirement analysis and the hardware construction are proposed.However,there are a series of problems between the pulse power supply system and the measurement and control system,such as level matching and signal isolation.So,the design of the external interface circuit and the auxiliary circuit is further completed.Finally,based on the existing hardware system,the software program of the measurement and control system is developed and designed by modules.Besides,the data acquisition module,excitation and discharge control module and data storage and analysis module are mainly described. |
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