The BLDC-MRM is a brushless d.c. multi-phase reluctance motor with bipolar two flat tops currents in the stator with a q=1 slot/pole/phase diametrical multiphase (m>3) a.c. stator winding and a magnetically anisotropic (Ld> Lq) passive rotor. The absence of rotor windings, the not so small air-gap, the around 90� natural power angle, good torque density, simple iE, iTcontrol, high fault tolerance and good d.c. link input voltage usage in the inverter make BLDC-MRM tempting for many applications, including heavy traction. The present paper aims a first attempt to introduce a rather complete analytical sizing method accompanied by key FEM validation for emf (by iF) waveform, torque pulsations and realization. Thermal stress is also investigated by FEM with promising results for 1.2 MW 2/6krpm traction applications.
1.2 MW, 2-6Krpm BLDC-MRM Traction Drive: Preliminary Design with Key FEM Inquiries
G. Giovinco;F. Marignetti;
2018-01-01
Abstract
The BLDC-MRM is a brushless d.c. multi-phase reluctance motor with bipolar two flat tops currents in the stator with a q=1 slot/pole/phase diametrical multiphase (m>3) a.c. stator winding and a magnetically anisotropic (Ld> Lq) passive rotor. The absence of rotor windings, the not so small air-gap, the around 90� natural power angle, good torque density, simple iE, iTcontrol, high fault tolerance and good d.c. link input voltage usage in the inverter make BLDC-MRM tempting for many applications, including heavy traction. The present paper aims a first attempt to introduce a rather complete analytical sizing method accompanied by key FEM validation for emf (by iF) waveform, torque pulsations and realization. Thermal stress is also investigated by FEM with promising results for 1.2 MW 2/6krpm traction applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
