Abstract
AC/DC critical conduction mode buck-boost converter with unity power factor
Highlights
Power electronic technology is employed in various sorts of modern equipment’s which has made our life, simpler, easier and comfortable
There is no input current when the output voltage is less than input voltage (Memon et al, 2018)
Whereas ‘’Vpk’’ represent the input voltage amplitude, θ represent the input voltage anTglhee.re are two switching cycles when buck-boost converter works in critical conduction
Summary
Power electronic technology is employed in various sorts of modern equipment’s which has made our life, simpler, easier and comfortable. The traditional boost PFC converter, with advantages of low input current ripple, high efficiency and inherent current shaping ability, is a good choice for PFC application. The traditional buckboost topology, with advantages of inherent current shaping ability, low cost, step-down and step-up voltage conversion, is a good choice compared with flyback, CUK and SEPIC converters. It is used in many applications such as wind energy control, Adaptive control applications, and power amplifier applications etc. An improved control scheme for buck-boost converter operating under critical conduction mode (CRM) is proposed to realize unity PF.
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