Abstract:
Nowadays, Permanent Magnet Synchronous Motors are most commonly used for their
high- performing role in industrial applications. Even though in comparison with other
motors, their efficiency and dynamic performance are higher, they are also affected by disturbances
because of some characteristics (cogging torques, load torques, friction torques,
dead time effects). Considering an easy,adjustable and powerful robust control technique
Disturbance Observer is extensively used for disturbance estimation. In DOB, internal
and external disturbances are evaluated applying verified dynamics and perceptible conditions
of plants, whereas the robustness is merely executed by feedback of estimated
disturbance. Primary aim in this thesis is to design a disturbance observer in frequency
domain for uncertain permanent magnet synchronous motor by applying a complete toolbox
is known as Disturbance Observer - Design & Analysis Toolbox (DO-DAT). DO- DAT
is enabled to design the Q filter assuring robust stability with expected nominal performance.
After several straightforward steps of experiment, observer gains are suggested
in this system. Simulations and experimental results on a 300W PMSM testbed substantiate
the cogency of the suggested disturbance observer of the system. Apart from the
conventional method of designing disturbance observer, this method is user-friendly and
accurate. From theoretical methods and modeling, it has been observed that they are
not able to assure the robust stability and expected nominal performance. Today’s world
needs Scientific methods and concurrent commercialization. If this method is applied for
industrial application, it will meet the increasing requirements. It will be cost-effective,
simple- to- implement and advantageous because this method is more reliable and flexible
for its specific characteristics.