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Determining The Excitation Voltage of Axial Flux Wound Rotor Synchronous Generator

Author(s): Abdul Multi | Iwa Garniwa

ISSN 1693-6930

Volume: 11;
Issue: 2;
Start page: 277;
Date: 2013;
Original page

Keywords: Synchronous generator | axial flux | excitation voltage | efficiency | terminal voltage

The axial flux wound rotor generator has field winding that must be connected to a dc voltage source. Varying the excitation voltage, its electric performance might  be controlled to meet the need of a load voltage attached to its terminal. The designed generator is small-scale capacity which has 1 kW, 380 V and 750 rpm. The generator has a single double-sided slotted wound stator sandwiched between twin rotor. The effect of excitation voltage changes on its  performance can be seen from the result of calculations using the given equations. The calculation results reveal electric quantities suited with respect to performance of the machine. The higher the voltage, the lower the losses. However, the higher the excitation voltage, the higher the efficiency and the terminal voltage. It has been found out that for the excitation voltage 11 V, the efficiency and the terminal voltage are 85.12 % and 380 V respectively.
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