High-Efficient Torque Control of Electrical Excited Synchronous Motors
High-Efficient Torque Control of Electrical Excited Synchronous Motors
The electrification processes involving transports are leading to the development of various traction solutions using ac motors. Currently, most traction solutions for hybrid- and electric- vehicles use permanent magnet synchronous motors (PMSM) to maximize the power/density. However, PMSMs almost all use rare-earth permanent magnets (PMs), whose availability and cost increasingly depend on geopolitical and economic factors. According to this scenario, several car manufacturers have proposed alternative traction solutions using electrical excited synchronous motors (EESMs). The EESM, in many cases also called wound-field synchronous motor, replace the PMs with an excitation winding placed on the rotor whose injected current can be regulated using slip rings or wireless power transfer solutions. This way, the magnetization level can be calibrated at any operating point to maximize motor efficiency.
Further information in the attached document.
(352,66 kB)Contacts:
Prof. Radu Bojoi (radu.bojoi@polito.it)
Sandro Rubino (sandro.rubino@polito.it)
Fabio Mandrile (fabio.mandrile@polito.it)