Research Of Pulse Current Generator Used For Magnetic Reconnection Device

Pulse current is an important aspect of the pulse power technology which is widelyused in national defense, scientific research, industrial production and other areas.Universities and research institutions all over the world are doing their best to pursue ahigher amplitude, shorter rise-time and greater transient power.Magnetic line reconnection is a very important physical process in researching thespace plasma. The disconnection and reconnection of the magnetic line lead to the changesin the shape of its topology which provides an effective way to convert magnetic energy toplasma kinetic and thermal rapidly. The parameter, boundary condition and diagnosis ofplasma can be easily controlled in laboratory. So, the simulation of magnetic reconnectioncan help us understand the physical mechanism directly and detailedly.In this paper, a pulse current system is designed which is used for the research ofmagnetic reconnection. The system contains three key sections: switch, air-core transformer,capacitor charging power supply (CCPS). Ordinary thyristor is selected as the switch of thesystem, using a strong trigger to enhance its ability to open; the role of the air-coretransformer is to enlarge the current to reduce the requirement of the rising rate of switch.The designed ratio is4, and the actual ratio is3.73according to the testing result. It istested that the air-core transformer can effectively reduce the current flowing through theswitch; CCPS is used for capacitor charging. Several ways are compared and the eventualadoption is LC series resonant topologies. Testing platform is built under the existingcondition, and we received the expecting result.