Bipolar Marx Circuit Based on Double Transformers

A topological structure of bipolar high-voltage power supply is proposed, which takes two sets of voltage generator as the core, and each one includes an all-solid-state Marx circuit and a set-up transformer, both the Marx circuits share the same DC input power supply. For purpose of getting the bipolar high-voltage, the secondary windings of two transformers with opposite dotted terminals are in series. At the beginning of this essay, the topology and parameters of the bipolar high-voltage power supply are designed and theoretically calculated, then SIMPLIS circuit software is used to verify the feasibility. Last but not least, a prototype which uses MOSFETs as the main switches were tested. Theories and experiments show that the topology has the ability to generate higher voltage ratio with fewer stages of Marx circuit. Under the condition of 200V DC input and 4 stages of the Marx circuit, the bipolar voltage with frequency of 50kHz and amplitude of 1600V is obtained.