Reduce Harmonic Orders of Voltage Waveform in the Synchronous Generator by Changing the Winding Structure

Stabilizing the voltage and frequency in the terminal of synchronous generators will be considered a significant challenge for designers working in the electrical energy area. Non-sinusoidal voltage waveform will create harmonic components that not only will result in an increase in iron losses but also will reduce the efficiency of synchronous generators. To reach this goal, a new stator winding design for synchronous generators is suggested in this study to suppress the third, fifth, and seventh harmonic simultaneously. The new winding will consist of a three-layer winding structure instead of the conventional one or two layers. In the proposed design, the coil turns in the slot will be different, and coils of different phases will be embedded in each slot. Ease of construction and sufficient performance without the necessity of any external expensive compensators will be considered other advantages of the proposed design. A 3 KW, 380 V, 1500 RPM synchronous generator is simulated in the Maxwell software under various load conditions and conventional (one and two) winding patterns. Also, the laboratory prototype of all the mentioned winding patterns will be implemented to verify the simulation results. The induced voltages and the search coil have been examined at various electrical loads. The output obtained from the experimental and simulation represent the sinusoidal voltage waveform and the eliminated harmonic component, as well.