Dead-time compensation for 2- level voltage source inverters based on harmonic current controllers

Abstract

This paper proposes dead-time compensation method for 2-level voltage source inverters based on harmonic current controllers. The sixth harmonic of the stator current in the synchronous reference frame originated from the dead-time effect is attenuated by using current resonant controllers. The resonant controllers are connected in parallel with the conventional PI current regulator. The resonant controllers calculate compensation voltage that is equal to the error voltage due to the dead-time, therefore the dead-time effect is mitigated. The proposed method is verified by simulation results.