Waveform characteristics and losses of a new double sided axial and radial flux generator

• The core and Copper losses have been found as 2.5 W and 23 W at rated values.
• The output voltage of new machine has the THD values of 0.4% and 4.7% for load and no-load cases.
• The waveform of new machine gives good sinusoidal three phase output.

In this paper, the waveform characteristics and the losses of a new three phase permanent magnet generator, which has a rated power 250 W at 1000 rpm have been explored theoretically and experimentally. The proposed generator has new flux morphology with the axial and radial directions, therefore the waveform characteristics become important for this new machine. The detailed phase voltage measurements prove that the machine generates sinusoidal waveform and the total harmonic distortion (THD) is found to be sufficient for such a new prototype machine. According to the detailed experimental measurements, the machine has THD values of 0.4% and 4.7% for resistive load and no-load cases. In addition, the losses and the efficiency measurements are found to be very promising although the airgap optimization has not been completed. According to the simulation studies, the machine has the core and copper losses of 2.5 W and 23 W for loaded cases, respectively.