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In this paper, a novel grid-connected high step-up inverter is proposed. The topology is composed of two stages. The first stage is a single-switch high step-up dc–dc converter with bipolar outputs, and the second stage is a conventional half-bridge dc–ac grid-connected inverter. Negative grounding of the photovoltaic (PV) module has resulted in elimination of unwanted ground leakage currents in the...
This paper introduces a new three phase quasi resonant DC link soft switching inverter. The auxiliary circuit of the proposed inverter has two auxiliary switches. Two auxiliary switches operate at soft switching condition. Furthermore, all diodes of the auxiliary circuit operate under soft switching condition. The auxiliary circuit is used to provide zero voltage switching condition (ZVS) for the...
In this paper, a new soft switching flyback inverter for AC module application is proposed. Conventional flyback inverter suffers from low efficiency and high switch stress. In this converter, RCD snubber limits voltage spikes across the primary switch and dissipates the energy of leakage inductance of transformer. This paper introduces a new soft switching flyback inverter. The auxiliary circuit...
In this paper a new high step-up DC-DC converter suitable for photovoltaic applications is investigated. Boosting the low input voltage in the proposed topology is implemented by using coupled inductors and one semiconductor switch. By using a passive regenerative clamp circuit, the energy of leakage inductor is absorbed and this provides a wider possible range of output power. Moreover, using just...
In this paper a new quasi resonant three phase soft switching inverter is proposed. The auxiliary circuit of the proposed inverter is composed of two auxiliary switches. All switches in the introduced quasi resonant inverter are soft switched. The auxiliary circuit provides zero voltage switching condition for the inverter main switches. The introduced inverter is compatible with PWM and SVM control...
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