Semiconductor static electric power converter optimized for oper

Electric power conversion systems – Current conversion – With condition responsive means to control the output...

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363 98, 363132, 363135, H02M 324

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active

057372055

ABSTRACT:
The invention relates to static electric power conversion using semiconductors using soft switching in zero-voltage mode and controlled to perform pulse width modulation, having a first interface (L, C, T.sub.a, D.sub.a) in series between a DC voltage input (E) and a converter (1), and with a second interface (2) connected to the connection between the first interface and the converter (1) and organized, immediately before the end of a voltage window of amplitude (1+k)E to cause a positive current to flow through the switch (T.sub.a,D.sub.d) to counter the input current of the converter (1) which is negative when the ripple current flowing through the inductor is at its minimum value so as to reduce the current ripple amplitude required for switching off the switch (T.sub.a, D.sub.a), thereby reducing the current ripple for controlling interruption of the short circuit provided by the branch(es) of the converter (1).

REFERENCES:
patent: 4864483 (1989-09-01), Divan
patent: 5172309 (1992-12-01), DeDoncker et al.
patent: 5617308 (1997-04-01), Weise et al.
Sikorski A. et al., Electronic Power Supply Systems, Brighton, Sep. 13-16, 1993, vol. 3, 13 Sep. 1993 Institution of Electrical Engineers, pp. 174-177.

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