Abstract:
This paper presents the design and analysis of a
permanent magnet (PM) transverse flux motor with soft
magnetic composite (SMC) core by applying multi-level
multi-domain modeling. The design is conducted in two
levels. The upper level is composed of a group of equations
which describe the electrical and mechanical characteristics
of the motor. The lower level consists of two domains:
electromagnetic analysis and thermal calculation. The initial
design, including structure, materials and major
dimensions, is determined according to existing experience
and empirical formulae. Then, optimization is carried out at
the system level (the upper level) for the best motor
performance by optimizing the structural dimensions. To
successfully deal with such a multi-level multi-domain
optimization problem, an effective modeling with both high
computational accuracy and speed is required. For
accurately computing the key motor parameters, such as
back electromotive force, winding inductance and core loss,
magnetic field finite element analysis is performed. The core
loss in each element is stored for effective thermal
calculation, and the winding inductance and back EMF are
stored as a look-up table for effective analysis of the motor's
dynamic performance. The presented approach is effective
with good accuracy and reasonable computational speed.
