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Pulse width-modulated (PWM) inverters are used more and more to operate electrical machines and to interface renewable energy systems with the utility grid. However, there are abundant high-frequency harmonics in the output voltage of a PWM inverter, which increase the iron losses and result in derating of the machine or transformer connected to them. Predicting the iron losses caused by the PWM supply...
This paper shows a three-phase feeding system to rural areas that are supplied by a single-phase feeder. This proposed system allows the use of three-phase agricultural equipments. The system proposed is formed by two bidirectional three-phase PWM converters, easily found to acquire at local market. The energy processed by single-phase transformer is maximized due the use of the power factor correction...
In the paper, a novel practical series hybrid active power filter based on the fundamental magnetic flux compensation of the series transformer is proposed. The power filter adopts the combined structure of a shunt passive filter and a series active filter by placing a series transformer's primary winding between power utility and harmonic-producing loads. The secondary winding of the transformer...
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