Soft switching power converter comprising means for correcting t

Details Soft switching power converter comprising means for correcting t Soft switching power converter comprising means for correcting t

1997-09-23

1999-03-09

Sterrett, Jeffrey

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363138, H02M 7521

Patent

active

058809490

ABSTRACT:
A power converter comprises two main switches connecting an output either to the positive rail or to the negative rail. Two freewheel diodes for maintaining the current in the load, two snubbers and an auxiliary circuit including an auxiliary inductor in series with two auxiliary switches connected between the output and a mid-point of a capacitive voltage divider supplying a median voltage. Any error of the median voltage relative to its nominal value is evaluated and the main switches are additionally commanded, depending on the direction of the error, for a time period dependent on the amplitude of the error, in order to cause an additional current in the auxiliary circuit to correct the error at least in part.

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R. W. De Doncker et al, "The Auxiliary Quasi-Resonant DC Link Inverter", Proceedings of the Annual Power Electronics Specialists Conference, Massachusetts, 25-27 Jun., 1991, No. Conf. 22, 23 Jun. 1991, Institute of Electrical and Electronics Engineers, pp. 248-253 XP000293058.
W. McMurray, "Resonant Snubbers with Auxiliary Switches", IEEE Transactions on Industry Applications, vol. 29, No. 2, 1 Mar. 1993, pp. 355-361, XP000369395.

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