Simulink Simulation of Three-Phase PWM with Third Harmonic Injection Control

This Simulink simulation implements power electronics control using three-phase PWM technology with third harmonic injection. The model includes a filter module to observe the PWM signal waveforms after low-pass filtering processing, which helps visualize how high-frequency components are attenuated. For implementation, the simulation typically uses PWM generator blocks with harmonic injection algorithms, where the third harmonic component is mathematically added to the fundamental modulation signal to increase DC bus voltage utilization. The low-pass filter can be implemented using transfer function blocks (like Butterworth or Chebyshev filters) with appropriate cutoff frequencies set to match the fundamental frequency. This approach is particularly suitable for power electronics beginners, providing hands-on experience with modulation techniques and filter design while demonstrating key concepts like harmonic analysis and waveform reconstruction through practical simulation components.