Abstract:
The inductances of an electric machine are those of the
most important parameters for the system modelling,
performance simulation and controller design. In
addition, the variations of the winding inductances,
which are associated with the position of the rotor, can
provide essential information for the sensorless drive of
a permanent magnet machine. This paper presents the
analysis of nonlinear inductances of a newly developed
short-stroke permanent magnet tubular linear motor.
The winding inductances including self and mutual
inductances are computed through an accurate method
based on nonlinear finite element solution. In order to
have a good understanding of the effects of both
structural and magnetic saliencies, the inductances
under different positions of moving armature as well as
different saturation conditions are analysed and some
interesting information is observed.
