Title :
Calculation of DQ-axis inductances of PM brushless ac machines accounting for skew
Author :
Chen, Y.S. ; Zhu, Z.Q. ; Howe, D.
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
Abstract :
In this paper, the influence of skew on the d- and q-axis inductances is investigated by using a hybrid 2-dimensional finite element/analytical technique, with due account for end-effects. In addition, a dc inductance bridge technique [2] is used to measure the d- and q-axis inductances in order to validate predictions for four brushless ac motors having identical stators, which are skewed by one-slot-pitch, but different rotor topologies, viz. with surface-mounted magnets, inset magnets, and interior magnets - both radially and circumferentially magnetised.
Keywords :
AC motors; brushless machines; finite element analysis; inductance; permanent magnet motors; stators; DQ-axis inductances; PM brushless ac machines; analytical technique; brushless ac motors; circumferentially magnetised; dc inductance bridge technique; different rotor topologies; hybrid 2-dimensional finite element technique; identical stators; inset magnets; interior magnets; one-slot-pitch; radially magnetised; surface-mounted magnets; AC machines; AC motors; Bridges; Finite element methods; Inductance measurement; Magnetic analysis; Magnets; Rotors; Stators; Topology;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463789
