PROJECT TITLE :

A PWM Plus Phase-Shift Controlled InterleavedIsolated Boost Converter Based on SemiactiveQuadruple Rectifier for High Step-UpApplications - 2016

ABSTRACT:

Semiactive quadrupler rectifiers (SAQRs) are proposed in this paper to serve as the secondary rectification circuits, which create the secondary-side voltages to be controllable and help scale back current stress and conduction losses. An interleaved isolated boost converter is developed primarily based on the proposed SAQRs. By utilizing the pulse-width modulation (PWM) plus phase-shift (PPS) management strategy, the first- and secondary-facet voltages are well matched to reduce this values and circulating conduction losses. With the proposed SAQRs, the voltage gain is extended and also the voltage stresses on power devices and passive parts used in rectification circuits are reduced to the [*fr1] of the high output voltage. Hence, the efficiency is improved by using a transformer with a smaller turns ratio and reduced parasitic parameters, and by employing low-voltage rating devices with better switching and conduction performance. With optimal design, lower voltage, and current stresses on the primary-facet switches, minimized input current ripple can be realized. Moreover, the zero-voltage turn on switching of the active switches and the zero-current turn off switching of the diodes will be achieved over a good load and voltage range by the proposed SAQR-based mostly converter and the management strategy. Meanwhile, the higher voltage gain, the lower voltage, and this stresses on power devices will be obtained with the proposed SAQR-based converter compared with passive quadrupler rectifier-primarily based converter. The feasibility and effectiveness of the proposed SAQRs and also the derived converter are verified by a 380-V output prototype.