Optimizing The Design of Single-Phase Permanent Magnet Generator Resulting from Modification of Single-Phase Induction Motor
I Made Wiwit Kastawan1, a), Rusmana 2), Rahmat Hidayat 1)

1 Study Program of Energy Conversion Engineering, Department of Energy Conversion Engineering, Politeknik Negeri Bandung, Indonesia
2 Study Program of Electrical Power Plant Technology, Department of Energy Conversion Engineering, Politeknik Negeri Bandung, Indonesia

Abstract

Having a similar construction, a single-phase induction motor can be operated as a single-phase generator simply by embedding permanent magnet pole in its rotor. Shape and number of permanent magnet pole as well as number and pattern of winding inserted in stator slot will strongly affect the generator output voltage. In this paper, three possible designs of single-phase permanent magnet generator resulting from modification of single-phase induction motor are proposed. The output voltage of each single-phase permanent magnet generator is analyzed based on its simulated flux distribution. Results show that both the 10 poles, 5 windings and 12 poles, 6 windings generator designs give nearly pure sinusoidal output voltage waveform with low percentage of total harmonic distortion (THD) of 2.85% and 2.34% respectively. The 10 poles, 5 windings generator able to generate output voltage with magnitude of 126.48 V while the 12 poles, 6 windings generator able to generate output voltage with magnitude of 130.57 V. However, the 8 poles, 4 windings generator design gives non-sinusoidal output voltage waveform with a relatively high THD of 8.02%. Also, this generator design generates a lower output voltage magnitude of 114.11 V

Keywords: harmonics, modification, output voltage, permanent magnet, single-phase generator, single-phase motor

Topic: Energy engineering