In this work an attempt is made to obtain a new AC-AC power frequency changer. Unlike the conventional types of the AC-AC frequency changers, the proposed frequency changer can be considered as the first AC-AC frequency changer using the zero voltage switching and the naturally commutated cycloconverter and can obtain an output frequency more than the input supply frequency. The output frequency range of this frequency changer is from 0 – 120Hz.The proposed frequency changer is based on the power frequency discrete modulation techniques (e.g. AM, PM, AM/PM, FM and Half Cycle Selection). In power frequency discrete modulation, subharmonics and higher order harmonics of the supply frequency component are usually generated in the three phases of a three-phase system. These harmonic components are found to be unbalanced in phase displacement. The correction of the unbalanced phase displacement angles is made using the multiples of 2π phase shifting technique. This phase shifting technique made the phase displacement angles of the nth harmonic balanced (i.e. 120o phases between each phase) except when n is a multiple of 3 where in this case the phase displacement angles become in phase. When the voltage waveforms of phases A, B, and C are added together after the correction of the phase displacement angles then the resultant voltage will contain only the multiple of the third harmonic since their phases are in-phase while those harmonics which have balanced phase displacement angles will add to zero. By this method output voltage waveforms with frequencies less or more than the input supply frequency is obtained with negligibly small THD. The MATLAB 7 is used to carry out the theoretical analysis and a prototype frequency changer is designed and built in the L2EP laboratory in ENSAM School of engineering (Lille, France). The system is tested with three – phase resistive and resistive inductive loads. It is found that there is a good agreement between the theoretical and experimental results.