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Analysis and implementation of a new zero current switching flyback inverter
Author(s) -
Arab Ansari Sajad,
Moghani Javad Shokrollahi,
Mohammadi Mohammad
Publication year - 2019
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2577
Subject(s) - flyback transformer , inverter , flyback diode , overshoot (microwave communication) , voltage , electronic engineering , electrical engineering , computer science , control theory (sociology) , topology (electrical circuits) , engineering , control (management) , artificial intelligence , transformer
Summary In this paper, a novel zero current switching (ZCS) flyback inverter in discontinuous conduction mode (DCM) is proposed. In the proposed flyback inverter, the ZCS for the primary switch is achieved by adding a simple auxiliary circuit to the conventional flyback inverter. Also, the auxiliary switch is turned on and turned off at ZCS condition. Therefore, the switching losses of the switches are negligible, which increases the efficiency and allows higher switching frequency and more compact design. The resonant auxiliary cell is activated only in short transition times that makes its conduction losses negligible. Furthermore, the voltage overshoot of the main switch is limited during the turn‐off process, which allows utilization of lower voltage metal‐oxide semiconductor field‐effect transistors (MOSFETs) with low conduction losses and low cost. The detailed operation of the flyback inverter with auxiliary circuit and design considerations are presented. Simulation and experimental results are presented to verify the performance of the proposed inverter.