Soft-switching power converter for operation in discrete pulse m

Details Soft-switching power converter for operation in discrete pulse m Soft-switching power converter for operation in discrete pulse m

1990-05-03

1991-08-06

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 16, 363 37, 363 56, 363124, H02M 3335

Patent

active

050382675

ABSTRACT:
A single-phase, soft-switching, ac-to-dc power converter comprises a rectifier for receiving and rectifying an ac voltage and providing the rectified ac voltage to a boost dc-to-dc converter, which in turn is coupled to an active clamped resonant dc link (ACRDCL). Resonant oscillations of the resonant dc link circuit comprising an inductor and a capacitor are maintained via control of an active clamp switching device. Soft-switching in a discrete pulse modulation scheme is achieved by controlling the switching instants of a boost switching device to occur at zero voltage instants of the resonant dc link. Alternatively, if a pair of snubber capacitors are added to the boost converter, soft-switching may be achieved in a pulse width modulation mode, resulting in reduced subharmonics even at higher frequencies and with smaller filter components.

REFERENCES:
patent: 4730242 (1988-03-01), Divan
patent: 4864483 (1989-09-01), Divan
Liu et al., "Zero-Voltage Switching Technique in DC/DC Converters", Pesc Records, 1986, pp. 58-70.
D. M. Divan, "The Resonant DC Link Coverter--A New Concept in Static Power Conversion", IEEE-IAS Proceedings 1986, pp. 648-656.
D. M. Divan, G. Skibinski, "Zero Switching Loss Inverters for High Power Applications", IEEE-IAS Proceedings 1987, pp. 627-634.

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