Small-signal analysis of a single-stage bridgeless boost half-bridge AC/DC converter with bidirectional switch

Mohamad Affan Bin Mohd Noh (Asia Pacific University of Technology and Innovation)
Mohd Rodhi Bin Sahid (Universiti Teknologi Malaysia)
Thang Ka Fei (Asia PAcific University of Technology & Innovation)
Ravi Lakshmanan (Asia Pacific University of Technology & Innovation)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 12, No 4: December 2021

A small-signal analysis of a single-stage bridgeless boost half-bridge alternating current/direct current (AC/DC) Converter with bidirectional switches is performed using circuit averaging method. The comprehensive approach to develop the small signal model from the steady state analysis is discussed. The small-signal model is then simulated with MATLAB Simulink. The small-signal model is verified through the comparison of the bode-plot obtained from MATLAB Simulink and the simulated large signal model in piecewise linear electrical circuit simulation (PLECS). The mathematical model obtain from the small-signal analysis is then used to determine the proportional gain K_p and integral gain K_i. In addition, the switch large-signal model is developed by considering the current and voltage waveforms during load transients and steady-state conditions.