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In this paper, a five-stage fault protection scheme against the short-circuit fault for parallel high-power three-phase combined inverter to achieve high reliability is proposed. There are two control modes, Voltage Controlled Mode (VCM) and Current Controlled Mode (CCM). VCM operates under normal operation to keep constant output voltage. CCM operates under fault operation to limit the output current,...
A low-cost diagnostic method for the single-phase inverter is proposed in this paper. A low-cost fabricated loop magnetic filed probe is used to detect the magnetic field near the output inductor of the inverter; the measured waveform is utilized as the diagnostic criterion, and is processed by the simple peak detector and comparators. With the proposed circuit, the open-circuit faults of the inverter...
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