Abstract
The effect of magnetic flux density magnitude on electromagnetic performance of a double stator permanent magnet synchronous machine is investigated and presented in this study. Finite element analysis method is applied in computing the results. The considered machine variables are: torque, losses, efficiency and electromagnetic power. The results reveal that output performances of a given machine would be affected by the magnitude of its magnetic flux density, particularly under saturation condition. Most promising electric machine characteristics are shown to be obtained from the device when the magnetic flux density magnitude is within 1.5 to 2.0 Tesla. The impact of this flux density amplitude should be taken into consideration during the design and operation of electrical machines, for effective and efficient output delivery. Highest amount of output torque, power and efficiency of 2.61 Nm, 109.46 W and 89.22 % are obtained from the simulated model at flux density amplitude of 1.6 Tesla.

Key words: Efficiency, magnet flux density, torque, power and saturation.