Inverters multinu00ecveis hu00ecbridos employing cells half bridge converters and an inverter three-phase / multiphase and their modulation hu00ecbrida

摘要

Inverters multinu00ecveis hu00ecbridos employing cells half bridge converters and an inverter three-phase / multiphase and their modulation hu00ecbrida. Describes hybrid multilevel inverters composed of an inverter three-phase voltage (or multiphasic) of two (2) or more levels, where each one of the stages is connected in series with one (1) or more modules of single-phase converters of the type half bridge.Each of the modules of the inverter half bridge is composed of two (2) sub cells basic half bridge, connected so as to obtain average voltage of zero in the output alternating current.The proposed voltage inverters can synthesize in the output voltages with different levels, which are directly related to the quantity of modules of single phase half bridge converters of the type employed in cascade with the three-phase inverter (or multiphasic) and levels of stress in The three-phase inverter power.As more modules of single phase half bridge type converters are added to the structure, the greater is the amount of voltage levels produced and, consequently, the better the quality of the voltage produced at the output.And proposed along with the inverters, a new hybrid modulation scheme, where the inverter three-phase (or multiphasic) is switched in the signal frequ00fau00eancia fundamental solution, while the modules of single phase half bridge type converters operating at high frequency.This modulation scheme is also part of this invention, which provides advantages in performance and potential to reduce losses.