A new topology of the high frequency alternating current (HFAC) inverter bridge arm is proposed which comprises a coupled inductor, a switching device and an active clamp circuit. Based on it, new single-phase and three-phase inverters are proposed and their operating states are analysed along with the traditional H-bridge inverter.
The proposed inverter can be applied to different applications by combining with different rectifier circuits. Taking PV for example, the basic requirements for a front-end DC–DC converter are high step-up ratio and electrical isolation because of the leakage current of PV modules and the low voltage of each module.
The proposed inverter bridge arm can be built up to form a three-phase inverter. As shown in Fig. 5, the proposed inverter consists of three coupled inductor bridges while their secondary sides are star connected. Its output waveforms and six main operating states are presented in Figs. 6 and 7, respectively.
As mentioned previously, full-bridge single-phase PV inverters have better performance of power density due to their split symmetrical AC inductors structure. The full-bridge PV inverters discussed in this paper can be separated into four groups.
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Abstract A new topology of the high frequency alternating current (HFAC) inverter bridge arm is proposed which comprises a coupled inductor, a switching device and an active …
The traditional modulation algorithm of three-level four-bridge arm inverter adopts 3D-SVPWM (three-dimensional space vector pulse width modulation method), which is difficult …
A new topology of the high frequency alternating current (HFAC) inverter bridge arm is proposed which comprises a coupled inductor, a switching device and an active clamp …
The interface inverter was developed to transfer energy from the PV module into the grid with constant common dc voltage. A 90MW PV system with a …
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