Noise mitigation in dual three-phase internal permanent magnet machines by injection of current harmonics

摘要

Steadily increasing power demands are linked with the ongoing process of electrifying the powertrain for dominant and pure electric vehicles. Fulfilling those requirements can be achieved by a multiphase approach which is implemented with a six-phase machine with buried permanent magnets. Besides the new modelling aspects, new control possibilities arise such as controlling the current harmonics individually using vector space decomposition (VSD) methods. Here, this method is used to influence the noise, vibration and harshness (NVH) maintaining the working point in torque and speed. A reduction up to 22 dB of the main acoustic order in the significant speed range was achieved.