DESIGN AND MODELING OF A SHORT -STROKE LINEAR PERMANENT MAGNET MOTOR

The thesis concentrates on design and modeling a short-stroke linear
permanent magnet motor using finite element analysis. Various types of linear
machines technologies have been review such as, linear induction motor, linear
synchronous motor, linear switched reluctance motor, linear DC motor and linear
permanent magnet brushless motor. The advantages of linear permanent magnet
motor which are, there is no field winding required for the motor since the
permanent magnet will produce the excitation flux for the motor. Even though it
has higher cogging torque but it also has higher output power. In other aspect, the
permanent magnet motor believe would give better dynamic performance due to
the higher magnetic flux density in the air-gap. Four proposed design have been
developed for further analysis; the single slot linear permanent magnet motor with
air-cored and iron-cored also the double slot linear permanent magnet motor with
air-cored and iron-cored. The design is relatively to improve efficiency of the
compressor system for refrigerator pump, which basically have very low
efficiency. The proposed design undergoes the optimization process with
optimizing the dimension of the motor that give influences to the motor
performance.