Abstract:
Single phase permanent magnets synchronous motors are those motors that are operated from a single phase AC supply, runs at a constant speed and have the ability to remain magnetised even when external magnetic field is removed. An equivalent circuit of single-phase permanent magnet synchronous motor (SPPMSM) is proposed in this work.
A combination of the symmetrical component theory, d-q axes model of induction motor and two-reaction theorem based on the salient pole synchronous motor to realize positive and negative sequence voltage equations were applied. The resulting positive and negative sequence voltages were used to formulate the proposed equivalent circuit of this machine which is capable of induction motor action and synchronous motor action during starting and running respectively thereby offering more physical interpretation of the machine.
Identification of physical characteristics performances of this machine was carried-out through simulation in the MATLAB environment and the interpretations of these performances were given and analysed.
From the performance characteristics, it suggests that the current value required to attain maximum power (730 watts) value is 4.376A. This in effect implies that the developed circuit offers a single-phase permanent magnet synchronous motor (SPPMSM) that is energy-efficient.
