Patent ID: 8737098

Claim:
A high voltage inverter comprising: a plurality of k-level flying capacitor H bridge modules, k being an integer greater than two, each of the plurality of k-level flying capacitor H bridge modules having: a positive dc terminal, a negative dc terminal, two ac terminals, and a dc source connected to an ac source and having a transformer, a rectifier rectifying an output voltage of said transformer, and a capacitor connected between the positive and negative dc terminals; and a connecting unit for connecting said ac terminals of said plurality of k level flying capacitor H bridge modules in series to form a cascading set of modules; wherein carrier waveforms for switching the plurality of k-level flying capacitor H bridge modules are phase shifted from one module to a next module by an angle equal to approximately 90 degrees divided by a number of modules in the plurality of k-level flying capacitor H bridge modules.