Abstract:
In this paper, a Voltage Multiplier (VM) converter
configuration has been designed for high Power PFC application,
ensuring reduced losses and high system efficiency.The
conventional PFC system is improved with adding VM circuit
configuration that enhances the static gain features with moderate
duty ratio (D), and hence, the reverse recovery (RR) issue is
resolved. The VM section inherently adds two main specific
features of clamping behavior and ZCS phenomenon to the
PFC system. An experimental prototype of 2 kW, 600 V VM
PFC converter configuration is designed and its effectiveness is
validated under low line input of 100 V , operating at a high
duty ratio, D = 0:67. The Real-Time Interface (RTI) feature of
dSPACE1104 and MATLAB/Simulink are used to give the control
signal for the verification of the system. Always, less than half
of the output voltage (300 V ) appears across the switches of the
converter, hence, voltage stress of the switch is minimized. Also,
ZCS phenomenon is evident during switching commutations due
to the snubber circuit behavior of the resonant tank, included in
the proposed PFC converter. Hence, the overall system efficiency
is improved. Furthermore, higher system efficiency is maintained
for different rating which has been tested in this research work.
