SPEAKER: Shivang Agrawal, Electrical and Computer Engineering, UIUC
TITLE: "Modeling of Rotor Flux-barriers in a Brushless Doubly-fed Reluctance Machine"
WHEN: Monday, March 8, 2021, 3:00 – 3:50 p.m.
ZOOM Meeting: Contact rsmth@illinois.edu
ABSTRACT: A brushless doubly-fed reluctance machine (BDFRM) is an attractive option for MW-scale wind-energy generation and electrified transportation due to its partially-rated power converter, reduced maintenance and the absence of permanent magnets. However, BDFRMs have inherently poor torque density and high-torque ripple because of the use of a sub-optimal rotor. Since the flux-modulation in a BDFRM is carried out by the rotor, the role of the rotor structure in torque production is important. This presentation describes an analytical model to compute the air-gap flux density and torque characteristics, with the goal to realistically model the flux-barrier effects on the mean and ripple torque. We verify through analytical and finite element analysis that the position of the flux-barrier ends highly influences the torque waveform and therefore their design has significant impacts.
