Abstract
In this study investigation is done on an H-bridge switched inductor base cascade multilevel DC-DC boost converter. The proposed multilevel DC-DC boost converter topology improves the conversion efficiency of traditional topology. The proposed boost converter topology is differing from the traditional topology by the addition of switched inductor circuit. The switched inductor improved the conversion ratio gain of the boost converter circuit. The switched inductor provides a very large output voltage with different output DC levels which makes it suitable for multilevel application. Then, the mode I and mode II of operation of switched inductor are analyzed. The use of proposed switched inductor base multilevel DC-DC boost converter improved the power quality and reduced the switching frequency. The proposed DC-DC boost converter topology simulated in MATLAB/Simulink working platform and the conversion performance is evaluated. Then, the conversion performance of proposed H-bridge switched inductor based topology is compared with single level and multilevel cascade boost converter topologies.
Highlights
Now-a-days, for power conversion multilevel converters have attracted interest in power industry (Rosas-Caro et al, 2008; Lai and Peng, 1996), since; the multilevel converters already are a very important alternative in high power applications (Rodriguez et al, 2002)
In almost all power conversion processes such as ac-dc, dc-ac, dc-dc and ac-dc-ac, it has been shown that multilevel converters are advantageous (Peng, 2001)
Low voltage stress, low EMI noise, low switching frequency, high efficiency, ability to operate without magnetic components are some of the advantages of multilevel converters contrary to traditional topologies (Rosas-Caro et al, 2010a; Ortuzar et al, 2006)
Summary
Now-a-days, for power conversion multilevel converters have attracted interest in power industry (Rosas-Caro et al, 2008; Lai and Peng, 1996), since; the multilevel converters already are a very important alternative in high power applications (Rodriguez et al, 2002). Low voltage stress, low EMI noise, low switching frequency, high efficiency, ability to operate without magnetic components are some of the advantages of multilevel converters contrary to traditional topologies (Rosas-Caro et al, 2010a; Ortuzar et al, 2006). Nami et al (2011) has proposed H-bridge multilevel pulse width modulation converter topology This topology is developed based on a series connection of a high-voltage diode-clamped inverter and a lowvoltage conventional inverter. Liu et al (2012) have proposed a cascade active-front-end converter It was developed based on dual-boost/buck converters, since it allows regulating the power factor to control both the active and reactive powers between medium and low voltage levels. The multilevel cascade DC to DC boost converter with H-bridge switched inductor based topology is proposed. For reducing the switching frequency and improving the conversion voltage, the switch inductor is used
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