Abstract-The alnalysis and design of electrical machines often
require analytical models for performance assessment and system
simulation. Ilnductances are important parameters of these
models. The principles and drawbacks of the existing inductance
calculation methods for electrical machines based on generalized
electrical machine theory and the finite-element (FE)
method are reviewed in this paper. To help alleviate some of
the problems associated with these existing methods, the author
has developed an improved FE inductance calculation method,
and used it to evaluate inductances of equivalent circuit models.
The new techniqiue utilizes the same finite-element field solutions
of electrical machines under actual multiphase excitations
as are used for torque calculations. This eliminate3 the need for
specially designed FE solutions, or for multiple solutions under
current perturbaltions such as are required by existing FE
methods. The new method has been verified by test results using
a 30 hp permanent magnet synchronous machine under different
load conditions.