Ali Mosallanejad

PhD Thesis Defense Session

Abstract:
Operation of the tubular linear reluctance motor depends strongly on the motor inductance profile. Therefore, calculating the motor inductance with a good accuracy is very important.
in this thesis The exact method for calculating the minimum and maximum inductance is proposed  and field intensity inside the iron core is achieved with regard to eddy current. Finite element method is used for motor simulation and its inductance calculation in every plunger position. For evaluating simulation and calculation results, a prototype TLRM was built and its inductance was measured. Also dynamic modeling of tubular linear reluctance motor is performed considering different conditions, such as eddy current effect, skin & proximity effect , different length condition, the current source inverter fed, plunger lock effect  stability curve.
This thesis represents a method for increasing the magnetic force and velocity in tubular linear reluctance motor by implementing step winding structure. Moreover the methods used in inductance calculation and the novel motor modeling are presented. The performance improvements in the proposed motor are proved using experimental results and FEM analysis. At the end, the simulation results are compared with experimental results. Good agreement between experimental and simulation results has been observed.
Also in this thesis all methods of increase efficiency of tubular linear reluctance motor are introduced, then optimal design of this motor is preformed and Optimal design method of motor are described by algorithms.
In the end, Multi Level Tubular Linear Reluctance Motor with control system and the equipment are made and experimental results are compared with dynamic modeling results. Good agreement between experimental and simulation results has been observed.

Date of Defense:Monday 90/06/14 , 9 am
Electrcal Engineering Department, class NO. 303.