Modelling and Simulation of an Electric Motor-Generator Set for Internal Combustion Engine Replacement

Sulemana Abdul Razak, Erwin Normanyo


In this paper, a squirrel cage induction motor was used as the prime mover of a permanent magnet synchronous electric generator to achieve a motor-generator set purposed for internal combustion (IC) engine replacement. The motor–generator set was modelled and subjected to performance analysis. The two mechanically coupled machines were tested at 400 VAC input in a Matlab/Simulink software version R2018a environment. The simulation results gave satisfactory responses in terms of the output characteristics of the individual machines as well as their combination. Output power of motor-generator set reduced by 1.7% in comparison to that of the synchronous electric generator. The motor–generator set however, achieved an output power efficiency of 96% at 1 pu of excitation. The excitation level of generator played a critical role in the performance of the motor–generator set. It was shown that the squirrel cage induction motor-synchronous electric generator set can serve as a replacement of the IC engine in standalone power supply systems.


Electric generator; Electric motor-generator set; Matlab/Simulink software; Modelling; Simulation.

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