Effect of Air Gap on Armature Voltage on Axial Flux Permanent-Magnet Generator ac by Using NdFeB 52

Abstract

There is an increase in the development of Axial Flux Permanent Magnet Generator (AFPMG) which is proven by numerous types of machine variations which are developed and studied. AFPMG has advantages in terms of lossless and thinner construction and its use in various fields of micro electromechanical system and domestic utilities. In the implementation of this design, we used ANSYS software to design the construction, flux distribution, and the expected voltage. In the design of this AFPMG, we made dual-rotor permanent magnet constructions clamping the stator containing an armature winding with a three-phase AC output voltage with a star winding configuration. The design process also included a simulation of the effect of gap distance differences on the electromotive force generated by the armature winding. The design results were implemented then tested with varying rotation and significant changes in air gap from 2 mm until 6 mm to produce the performance of the machine. Based on the test results, the maximum voltage in the zero-load condition, in which the air gap was at 2 mm, was 10.7. In the loaded test with rpm variation, the voltage regulation was with a range of 32.96% and 43.75% for a 2 mm air gap.