Methods to Recover Modulating Wave in Three-Phase Inverters Simulation

Aiming at PWM implementing methods-carrier intersection technique and direct digital technique-the paper introduces the principle of symmetry regular sampling method and the modulating wave of several PWM strategies. Based on volt-second balance principle, a new method to recover the modulating wave and zero consequence component in simulation is proposed. Proposed method, continuously moving average method, LPF method are simulated and discussed. The result shows that the proposed method works better than the other two methods. The paper provides a feasible simulation platform for the beginner´s inverter learning and understanding deeply.