This work presents a modulator implemented in a FPGA for power matrix converters. Its function is to operate as a peripheral unit of a digitally-controlled system in order to generate duty cycles for each of the converter switches and provide a safe commutation of the switching devices. The correct generation of duty cycles and sequences was verified, as well as the safe commutation of bi-directional switches. The performance of the modulator in conjunction with the power stage and a DSP, which performs the high level control layer, was also analyzed.