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This paper focuses on the circuit which is to reduce the number of switching elements in comparison to a common multi-level inverter NPC inverter. Increasing the number of levels of the output voltage at reduced circuit number switching elements, and performs waveform improvement. Typically, the ratio of the input voltage of the multi-level inverter is E1 : E2 = 1 : 1. When the ratio of the input...
Uninterruptible power supplies (UPSs) are widely used to overcome instantaneous voltage drops and complete power failures. This paper proposes a novel single-phase standby UPS with a small size and high reliability. The proposed UPS consists of a buck-boost converter and a full-bridge inverter; this device eliminates the need for bulky electrolytic capacitors or output LC-filtering. The buck-boost...
This paper proposes a method for reconstructing the three-phase voltage output of a current source inverter (CSI). The method produces a three-phase voltage by using the DC-link voltage and the switching pattern of the CSI and improves the reconstructed waveform by using the delay time of a filter. The proposed method can reduce errors between the actual voltage and the reconstructed voltage at the...
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