A repression method of current harmonics using phase-shifting reactor for high speed generator

This paper presents an alternating circuit topology of phase-shifting by means of reactor instead of transformer. Because the phase-shifting reactor is in series with the main circuit, it only needs a few turns which can reduce the size and cost of the phase-shifting circuit remarkably. The principle of phase-shifting, structure of phase-shifting reactor and choice of the optimal phase shifting angle, determination of turns and connection mode of the phase-shifting windings etc. are analyzed and discussed. The simulation results for a high speed PM generator with and without the phase-shifting reactor show that the phase-shifting reactor can reduce effectively the 5, 7, 11 and 13 harmonic components of the generator current