12TH ACTIVE FILTER
A 12th active filter is provided to eliminate both 11th and 13th harmonics by using a converter for compensating for characteristic variations due to temperature changes and device wearing. A passive filter(7-1) is made of a condenser(7-1-1), an inductor(7-1-2), and a resistor(7-1-3). The condenser,...
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Zusammenfassung: | A 12th active filter is provided to eliminate both 11th and 13th harmonics by using a converter for compensating for characteristic variations due to temperature changes and device wearing. A passive filter(7-1) is made of a condenser(7-1-1), an inductor(7-1-2), and a resistor(7-1-3). The condenser, the inductor, and the resistor have A, B, and C phases, respectively. The passive filter with respective phases is connected to a switch(7-3) and a power source converter(7-4) via a transformer(7-2). The power source converter includes an ignition portion(7-7) which is connected to a base of a transistor of semiconductor elements(V1-V6). A controller(7-6) is connected to the ignition portion and a signal detector(7-5) is connected to the controller. The controller eliminates both 11th and 13th harmonics. |
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