Dc side commutated inverter

H - Electricity – 02 – M

Patent

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321/54

H02M 7/155 (2006.01) H02M 7/521 (2006.01)

Patent

CA 1160681

TITLE A DC-SIDE COMMUTATED INVERTER INVENTORS Pradeep M. Bhagwat Victor R. Stefanovic ABSTRACT OF THE DISCLOSURE The inverter may be single phase with one inverter leg or N-phase with N inverter legs for connection across a DC source. Each leg includes a pair of series connected thyristors with a ter- minal between the thyristors for connection to a load. In addition, each thyristor has a diode connected in reverse polarity across it. A commutation circuit which includes an inductor in series with the inverter legs and a capacitor in parallel with the inductor and the inverter legs, provides a commutation pulse to turn off the thyristors in each leg. A further isolating inductor is connected at the DC power input to the inverter, and a reverse polarity feed- back diode may be connected across it.

379625

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