In this paper, a novel discrete 3-phase PWM generator design & simulation for a 3-phase, 4-level inverter to mitigate harmonic distortions in industrial power converter is presented along with its simulated results. Design is conducted in the Simulink’ of the Matlab environment. The result are compared with others to show the efficiency of the methodology that has been developed by the team of researchers. This paper presents a novel design for a discrete 3-phase Pulse Width Modulation (PWM) generator, which is utilized in the simulation of a 3-phase, 4-level inverter to mitigate harmonic distortions in industrial power converters. The proposed PWM generator design achieves superior harmonic suppression compared to conventional PWM techniques, making it suitable for use in a wide range of industrial applications. The simulation results demonstrate the effectiveness of the proposed design in reducing the total harmonic distortion of the inverter output voltage waveform. The presented approach offers a practical solution to enhance the performance of industrial power converters in terms of harmonic suppression, and has the potential to be applied in various power electronic systems.