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

Abstract

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.

Keywords

• torque
• power transmission (mechanical)
• electric vehicles
• vibrations
• permanent magnet machines
• noise abatement
• harmonics
• noise mitigation
• three-phase internal permanent magnet machines
• current harmonics
• powertrain
• multiphase approach
• vector space decomposition methods
• vibration
• harshness
• electric vehicles
• torque point
• noise figure 22.0 dB