Calculation of the third harmonic excitation of synchronous generator using tooth flux method

The windings voltage value and waveform of synchronous generator is calculated accurately using tooth flux method. In this method, the effects of the magnetic circuit geometry, saliency, saturation, winding layouts and slot shape are included. The the tooth flux method calculating characteristic and the windings voltage waveform of third harmonic excitation system of the no-load and on-load are proposed. The exactness of this method are verified by the comparison of the calculation results and the experiment results on a third harmonic excitation synchronous generator. Thus a difficult problem which calculates third harmonic excitation system accurately is solved.