Single Phase to Three Phase Drive System Using High Power Density Single Phase Pwm Rectifier with Active Ripple Energy Storage

The main objective of this project is single-phase to three-phase drive system composed of High power density PWM rectifiers with active ripple energy storage.The proposed topology permits to reduce the rectifier switch currents, the harmonic distortion at the input converter side and presents improvements on the fault tolerance characteristics. With the decrease in the number of switches, the total energy loss of the proposed system may be lower than that of a conventional one. It is well known that there exist second-order harmonic current and corresponding ripple voltage on dc bus for single phase PWM rectifiers. The low frequency harmonic current is normally filtered using a bulk capacitor in the bus which results in low power density. This proposed an active ripple energy storage method that can effectively reduce the energy storage capacitance. The feed-forward control method and design considerations are provided. The circuit employs conventional PWM switching strategy to control its output voltage. With a suitable control strategy, including the pulse width modulation technique (PWM) is developed and simulation results are presented as well in order to known about the important characteristics features of the proposed system.