High step-up converters based on quadratic boost converter for micro-inverter

High step-up interleaved boost converter with low switch voltage stress

“…However, two stages structure induces not only the complex topology and the efficiency degradation, but also poor stability [6,7], and also the reverse recovery loss of the output diode is severe [8,9]. The isolatedtype converter can easily offer a high step-up voltage gain with a ratio.…”

“…Many quadratic converters and cascade structure have been investigated to raise the step-up voltage gain and prevent converters from operating at extreme duty cycle [6][7][8][9]. However, two stages structure induces not only the complex topology and the efficiency degradation, but also poor stability [6,7], and also the reverse recovery loss of the output diode is severe [8,9].…”

Fuzzy Controlled ZVS Asymmetrical PWM Full-bridge DC-DC Converter for Constant load High Power Applications

“…It gives high voltage gain without extreme high duty ratio. For micro-inverter applications a new converter topology is formed by integrating quadratic boost converter stepup capability and tapped inductor based converter [6]. It gives high voltage ratio at low duty ratio.…”

Bidirectional boost/buck quadratic converter for distributed generation systems with electrochemical storage systems

“…Non-isolated topologies are mainly based on the conventional Buck-Boost and Cuk configurations which are fairly simple and easy to control [22][23][24][25]. However, in many applications the high gain requirements are such that the conventional DC-DC converter operates with extremely duty-cycle operation which may result in reverse-recovery problem and causes not only low efficiency but also creates electromagnetic interference (EMI) problems [13]. To extend the voltage gain ratio, several DC-DC converters with magnetic coupling techniques have been proposed, notwithstanding some disadvantages such as pulsating bus voltage remain and complex control schemes [26,27].…”

“…Besides the adaptation to different voltage levels these converters will also control the charge or discharge of storage devices according with required operating condition. Several bidirectional DC-DC converters based on isolated and non-isolated topologies have been presented in literature for this purpose [12][13][14][15][16][17]. Most of isolated topologies need a transformer and a high number of switching devices which increases the cost and the switching losses, in addition to more complicated control schemes [18][19][20][21].…”