Title :
Cogging torque optimization of a four-pole PM machine
Author :
Trifu, Ion ; Tudorache, Tiberiu ; Ghita, Constantin ; Nedelcu, Steluta
Author_Institution :
Fac. of Electr. Eng., Univ. Politeh. of Bucharest, Bucharest, Romania
Abstract :
This paper presents a finite element based optimization study of a four-pole permanent magnets machine. The purpose of the analysis is to find a constructive solution characterized by a cogging torque less than 1% of the rated torque of the reference machine and reduced e.m.f. harmonics. The elements that are modified during the optimization process are the cross-section geometrical parameters of the permanent magnets and of the rotor core by keeping unchanged the magnets volume and stator geometry. Several constructive measures were studied, the best one being deeper analyzed. The numerical analysis is based on 2D magneto-static and transient magnetic type finite element models of the machine. Some of the numerical results are validated by experimental measurements.
Keywords :
finite element analysis; harmonics suppression; magnetic cores; permanent magnet machines; rotors; torque; 2D magneto-static finite element model; cogging torque optimization; cross- section geometrical parameters; e.m.f. harmonic reduction; finite element based optimization; four-pole PM machine; four-pole permanent magnet machine; numerical analysis; rotor core; stator geometry; transient magnetic type finite element model; Forging; Magnetic cores; Magnetic flux; Stator cores; Stator windings; Torque; Permanent magnet machines; cogging torque reduction; finite element analysis;
Conference_Titel :
Advanced Topics in Electrical Engineering (ATEE), 2013 8th International Symposium on
Conference_Location :
Bucharest
Print_ISBN :
978-1-4673-5979-5
DOI :
10.1109/ATEE.2013.6563387
