Performance comparison of single winding and double winding self-excited induction generators

A single phase self excited induction generator (SEIG) can operate in two configurations; single winding and double winding. Their performance analyses have been presented quite extensively by the researchers. However, all of these address each configuration in isolation with no attempt being made thus far to present an integrated comparative performance assessment of the two models. This paper fills this gap on SEIG research by articulating a detailed comparison of the performances of two SEIG constructions operating under steady state condition. The circuit models of both configurations are based on double field revolving theory while the mathematical models are obtained by combining various branch impedances to develop performance equations. The derived performance equations are used to obtain various SEIG characteristics in both operating modes with different operating parameters such as load, speed, capacitances, etc. The simulation programs are developed through MATLAB M-file to obtain various no-load and load characteristics of SEIG models for resistive as well as inductive loads. The results explicitly establish preponderance of double winding SEIG (DWSEIG) over single winding SEIG (SWSEIG) on all counts. This is attributed to the dual winding utilization in DWSEIG unlike SWSEIG in which the load as well as excitation capacitance both are accommodated in main winding leaving auxiliary winding open. The developed method is also verified through experimental tests on a 220/230 V single phase, induction motor. The corresponding simulated and experimental results are reasonably convergent.