Current clamped, PWM, quasi-resonant DC link series resonant converter

This paper presents a new high frequency series resonant DC link topology derived by Y. Morai and T.A. Lipo (1988), wherein the resonant tank does not bring about peaky currents in any portion of the system. The characteristic overall-clamping mechanism permits lower-current-rating for the semiconductor devices, resonant capacitor and filter capacitors, easing the cost burden. Moreover, the values of the resonant inductor and the capacitor can be reduced substantially, limited only by the di/dt ratings of the devices, since the resonant current peaks, which would otherwise have risen to a higher value (tank storage energy burden) no longer appear in this configuration. In the paper, the converter is digitally simulated using “ACSL” and output performance is investigated. The voltage stresses across the auxiliary switches are estimated using the “SABER” simulator on a mono-phase model. PWM-capable other series resonant topologies are compared with the new topology for voltage stresses across the auxiliary switches using the SABER simulation code