Study And Design Of Power Supply System In DNB For EAST

This paper particularly introduces the beam source of the diagnostic neutral beam, power supply system and the monitor and control system. According to the requirement of the EAST to DNB power supply system, studies and designs the power supply systems of the accelerator and the suppressor. Three different design projects of accelerator power supply for special requirement of the EAST are introduced briefly. After the last comparing ,the project of electron tube in series have been chosen , the most important thing is the configuration and parameter design of the accelerator's primary power supply. Main circuits is composed of the booster cell and the commuting cell. After counting the parameter of the transformer, the commuting parts and all the protecting parts, analyzing AC current harmonic and giving the parameter of power filter , the simulations of primary power supply is established. It is found that the main circuits have more stable fan-out voltage , higher power ratio , lower AC current harmonic ratio and less disturber. It is completely reached the design requirement. The paper also studies the power supply of the suppressor and design the protecting circuit.