A fibonacci type dc ac inverter designed by switched capacitor technique
To use electric appliances inside vehicles, a Fibonacci switched capacitor (SC) DC AC inverter is proposed in this paper. Various SC DC AC inverters were proposed as previous studies. Unlike common DC AC inverters containing inductors or transformers, the SC inverters require no magnetic components. Among others, an SC DC AC inverter based on a series parallel type converter is famous as a conventional DC AC inverter. However, the conventional DC AC inverters require many capacitors to generate a staircase AC waveform. To reduce the number of capacitors, the proposed inverter is controlled so that the voltage ratio of capacitors becomes the ratio of a Fibonacci number. The proposed inverter generates the staircase AC waveform by combining some of these capacitors in series. Therefore, unlike the conventional SC DC AC inverter based on a series parallel type converter, the proposed inverter can provide the staircase AC waveform by a smaller number of capacitors. In this paper, the validity of the proposed inverter is verified by the theoretical analysis. The simulated results show the property and the effectiveness of the proposed inverter. The feasibility of the proposed inverter is demonstrated in circuit experiments.