Analysis and design of voltage doubling circuit for 500kV 15mA high voltage supply

Abstract

Among many important equipment and instruments, in order to obtain a stable HVDC output, a high voltage multiplier power supply is usually used. With the development of science and technology, higher requirements are put forward for the performance parameters of high voltage multiplier power supply. In this paper, the core part of the high voltage multiplier power supply - voltage doubling circuit as the focus of research. Firstly, the principle of various voltage doubling circuits are analyzed, the steady state analytical formula under ideal state is obtained and their advantages and disadvantages are analyzed. According to the above analysis and comparison, this paper proposes that the topological structure of the voltage doubling circuit for the 500kV HV power supply is the symmetrical CW multiplier circuit. Then the ripple expression of the symmetrical CW multiplier is deduced, the reason of voltage sag is analyzed, and the calculation expression is given. Finally, a simulation model of the voltage doubling circuit of the HV multiplier power supply was built in ANSYS Simplorer. The validity of the analytical design is verified by experimental simulation.