A 26 W Power Supply Based on Luo Converter with Improved Power Factor and Total Harmonic Distortion

摘要

A 26 W power supply is proposed in this research paper to glow an LED (light emitting diode) load. It is based on single-stage single-switch circuit, which used power factor corrected (PFC) positive Luo converter to maintain the power quality. The converter is operating in continuous conduction mode (CCM) to get constant load voltage. To stabilize the whole system, a PI (proportional integral) is designed and used to generate control signal. Theoretical verification of system stability is done with the help small signal state-space averaging technique. The simulation model of proposed power supply is performed in MATLAB sim-power toolbox. A constant output of voltage 65 V and current 0.4 A is achieved with better power quality parameters as power factor (PF) and total harmonic (THD). The quality parameters satisfy the standards of IEC 61000-3-2.