Title :
Comparison of interior PM machines with concentrated and distributed stator windings for traction applications
Author :
Tangudu, Jagadeesh K. ; Jahns, T.M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Wisconsin - Madison, Madison, WI, USA
Abstract :
This paper presents a detailed design comparison of two types of high-performance interior permanent magnet (IPM) synchronous machines designed to meet demanding FreedomCAR traction machine specifications, one with fractional-slot concentrated windings (FSCW) and the other with integral-slot distributed windings (ISDW). An IPM rotor that was originally designed for an FSCW stator with a slots-per-pole-per-phase (SPP) value of 2/5 and double-layer windings is used in all four of the studied designs. This comparative investigation is carried out using finite element analysis with both single- and double-layer winding configurations. Key performance metrics are compared including the predicted back-EMF, the characteristic current, cogging torque, and highspeed losses under full load operating conditions.
Keywords :
finite element analysis; permanent magnet machines; stators; synchronous machines; traction motors; FSCW stator; FreedomCAR traction machine; cogging torque; concentrated stator windings; distributed stator windings; double-layer windings; finite element analysis; fractional-slot concentrated windings; integral-slot distributed windings; interior PM machines; interior permanent magnet synchronous machines; slots-per-pole-per-phase; Loading; Magnetic flux; Power capacitors; Stator windings; Torque; Windings; Electric machines; FreedomCAR; fractional-slot concentrated winding; integral-slot distributed winding; interior permanent magnet machines; traction motor;
Conference_Titel :
Vehicle Power and Propulsion Conference (VPPC), 2011 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-61284-248-6
Electronic_ISBN :
Pending
DOI :
10.1109/VPPC.2011.6043171
