Determining the Air Gap Length of an Axial Flux Wound Rotor Synchronous Generator

The  air  gap  length  of  the  designed  axial  flux  wound  rotor  (AFWR)  synchronous  generator  is  determined  properly according to the design parameters. One of the distinct advantages of  an axial  flux (AF)  machine is  its adjustable air gap. An AF generator’s performance might be controlled by adjusting its air gap. The designed generator has a small-scale capacity that has 1 kW, 380 V, and 50 Hz. The windings are laid into slots made from laminated core. The slots are carved in the face of the stator and rotors. The generator has a single-double-sided slotted wound stator sandwiched between twin rotors. The effect of air gap changes on its  performance can be seen from the calculation results using the given equations. The results reveal electric quantities suited to the machine’s effective performance. The smaller the air gap,  the  greater  the  efficiency  and  power  factor  and  the  smaller  the  armature  current  and  voltage.  The  efficiency  and armature current for 0.1 cm air gap are 85.30 % and 1.815 A, respectively

Analisis Kinerja Pembangkit Listrik Energi Terbarukan Pada Model Jaringan Listrik Mikro Arus Searah

This paper aims to analyze the performance of the Renewable Energy Power Plants which are consist of PLTS and PLTB 12V/100W that supplies power into DC microgrid. Before supplying the power, each power plant was tested in no-load and on-load conditions. On the DC microgrid is tested burden sharing between the PLTS and PLTB by considering the capacity of each battery. The PLTS's test results indicate that 12V 80W of solar cell that facing to the east direction on June 2010was producing electric current in the largest average number (1.954 A) and charging the 12V, 45 Ah of battery for 23 hours, faster than if faced it to the other direction. The voltage decreased occurring on PLTS and PLTB by 9.4% and 8.4% of the nominal voltage of 12V when they burdened with 80% of nominal load 100W. This happens due Load which connected into the direct current electricity micro grid, get the power supply from PLTS and PLTB on which each power plant equipped with the batteries at the same capacity 12V 45Ah. On no-load conditions, PLTS and PLTB charging the battery, while on loaded conditions, the electric current which generated by both power plants flowed into the load, with the division of electric power that supplied into the load depends on each battery's power. Power plants with a larger charging battery supplying power greater than the power plants with a smaller charging battery. Keywords Renewable energy, microgrid, direct current, the performanc