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Research on Double Buck Inverter Based on Double Closed-loop Control

The operation reliability of the circuit is one of the main indexes of the topology design in the inverter system, and the problems of direct and backward recovery can directly affect the reliability of the operation of a circuit. Dual Buck inverter can solve the above problems without the dead-time protection, but low inductance utilization will increase the weight and volume of the whole system. Firstly this paper has reviewed the traditional DBI topologies and a single inductor DBI which can make full use of the inductance. The novel method maintained the traditional DBI’s advantage of high reliability and can make full use of the inductance. Then the paper adopts the voltage double closed-loop control strategy that simulation study in the improved DBI system. Finally, the experimental results verify the theoretical analysis. Also compared to the single inductor DBI, the novel method could achieve lower conducting loss and simpler controlling strategy.