Abstract
In a DC-AC system, some problems may threaten the reliability of the whole system, such as the shoot through issue and the failure of reverse recovery. Some methods are proposed to improve the reliability of the converters. The dual buck inverters can solve the above problems without adding dead time but the dual buck topology has a main drawback of low magnetic utilization which increases the volume and weight of the system. This paper firstly summarizes the traditional dual buck topologies including a kind of single inductor dual buck inverter which can make full use of the inductance. Then a method to improve the reliability of the MOSFET inverter is proposed. A kind of novel dual buck inverter with series connected diodes and single inductor is introduced. The novel inverter retains the dual buck topologies' advantage of high reliability and can make full use of the inductance. Also, compared to the traditional single inductor dual buck topology, the controlling strategy of the proposed inverter is simpler. Finally, the simulation and experimental results verified the theoretical analysis.
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