Modified PWM strategy for five level cascade h-bridge inverter with boost voltage capability
Corressponding author's email:
tridd@hcmute.edu.vnKeywords:
Cascaded H-bridge inverter, boost inverter, five-level inverter, shoot-through state (ST), quasi-Z-source inverterAbstract
The quasi-switched boost inverter (qSBI) has the advantage over the quasi-Z-source inverter (qZSI) in reducing one capacitor and one inductor. The qSBI is not only applied to the cascaded H-bridge (CHB) topology to create a new cascaded single-phase five-level inverter (CHB-1P-5LI) but also reduces the current ripple of the inductor by using two high-frequency carriers vcar1 and vcar2, where vcar2 is generated by shifting vcar1 through 90°. This paper presents circuit analysis, the operating principles, and simulation results of the CHB-5L-qSBI. A laboratory prototype was constructed based on a DSP TMS320F28335 to validate the operating principle of the CHB-5L-qSBI.
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