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A novel single-phase full-bridge inverter without clamping diodes and flying capacitor is presented to achieve five-level PWM operation. The circuit topology of the adopted inverter has fewer power semiconductors compared with the single-phase neutral-point clamped inverter and flying capacitor inverter. There are only six active switches in the proposed inverter. Four power switches with full DC-bus...
A new three-switch buck-boost inverter suitable for distributed generation (DG) applications is presented. The operation principle is analyzed in detail and the mathematics model is founded based on input-output power balance principle. SPWM control method is employed to optimize the inverter performance. Compared to the conventional double-stage inverter, the proposed converter is structurally simple...
A novel PWM technique for single-switch three-phase AC-DC buck converter is proposed to reject input voltage fluctuation, obtain high quality output voltage and realize open-loop operation mode. By controlling the duty cycle of the switch which tracks the change of input voltage, the energy supplied by AC mains and the energy consumed in load can keep invariable in every switching cycle. So the output...
A novel single-stage isolated buck-boost inverter is proposed in this paper, which can generate an AC output voltage larger or lower than the input one in a single power stage. A high-frequency transformer operating as energy storage element is used to perform electrical isolation between the DC input and the AC output. The operation principle is analyzed in detail and the mathematics model is founded...
A novel PWM technique for single-switch three-phase AC-DC buck converter is proposed to reject input voltage fluctuation, obtain high quality output voltage and realize open-loop operation mode. By controlling the duty cycle of the switch which tracks the change of input voltage, the energy supplied by AC mains and the energy consumed in load can keep invariable in every switching cycle. So the output...
A novel single-stage isolated buck-boost inverter is proposed in this paper, which can generate an AC output voltage larger or lower than the input one in a single power stage. A high-frequency transformer operating as energy storage element is used to perform electrical isolation between the DC input and the AC output. The operation principle is analyzed in detail and the mathematics model is founded...
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