Operation and Analysis of Modified Quasi ZSI in DCM and CCM
This paper presents a new functional powered boost adjusted inverter, with improved voltage gain by incorporating an anti-parallel switch, with an implemented capacitor that allows two operating modes. These modes include continuous mode of conduction, and discontinuous operating mode. In the proposed Quasi Z-Source Inverter (QZSI), the voltage gain is significantly increased by adding auxiliary switch, without the use of passive components. The two operating modes are distinguished by varying switched capacitor QZSI inductances and load conditions. The improvement potential of the proposed CC-QZSI can be expanded further (n-stages) by connecting diodes and capacitors in n (n: number of stages). The limiting conditions for CCM / DCM were derived. Detailed analysis of the voltage control power, current inductance ripples, stresses, and converter losses on switching devices for CCM and DCM has been carried out. Both operation modes were simulated, and experimentally verified and validated.
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