Soft-switching power converter for operation in discrete...

Details Soft-switching power converter for operation in discrete... Soft-switching power converter for operation in discrete...

H - Electricity

02

M

321/23, 321/29,

H02M 7/162 (2006.01) H02M 3/157 (2006.01) H02M 5/293 (2006.01) H02M 7/48 (2006.01)

Patent

CA 2039792

RD-19,799 A SOFT-SWITCHING POWER CONVERTER FOR OPERATION IN DISCRETE PULSE MODULATION AND PULSE WIDTH MODULATION MODES 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, is a pair of snubber capacitors are added to the boost converter, soft-switching may be achieved in a pulse width modulation mode, requiting in reduced subharmonics even at higher frequencies and with smaller filter components.

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