Abstract
Flyback converters are the more suitable choice for low power supply because of their simple design, low cost and high efficiency. Other advantages are that in Flyback converters the load is isolated from supply and one can obtain multiple outputs without need for separate regulators. The soft switching of controlled switches enhances the efficiency in the power converters due to reduction of switching losses. Snubbers are small networks of parts in the power switching circuits whose function is to control the effects of circuit reactances. Snubbers enhance the performance of the switching circuits and result in higher reliability, higher efficiency, higher switching frequency, smaller size, lower weight and lower EMI. Therefore this study presents the performance of and Zero Voltage and Zero Current Switched (ZVZCS) Flyback converter with RCD snubber.
Highlights
Despite large output voltage ripple, single-stage AC-DC conversion is a more attractive solution than two-stage conversion from the standpoint of the cost and power density
Resonant technology power supplies are the variation on the basic Pulse Width Modulated (PWM) switching power supply finds its place in applications where still lighter weight and smaller size are desired and most importantly, where a reduced amount of radiated noise is desired
The soft switching of a flyback converter can be achieved by operating the circuit in the critical conduction mode
Summary
Despite large output voltage ripple, single-stage AC-DC conversion is a more attractive solution than two-stage conversion from the standpoint of the cost and power density. In applications like battery chargers, Plasma Display Panel (PDP)sustaining power supplies and LED lighting; low frequency, 100 or 120 Hz, large output voltage ripple is inconsequential (Bellur and Kazimierczuk, 2008; Hua et al, 1994; Wang, 2008; Lin and Hsieh, 2007; Chung et al, 1999, 1997; Adib and Farzanehfard, 2008a, b, 2009; Yuri and and Milan, 2002, Majid and Abbas, 2013; Venkanna et al, 2014). PWM switching power supplies are much more efficient and flexible in their use than linear regulators.
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