A controlled current inverter for active distortion compensation and power factor correction

A technique of achieving both active current distortion compensation and power factor correction is described. A signal corresponding to the phase-corrected distortion component of load current is amplified by a high-frequency asynchronous switching inverter for addition back to the supply current to cancel the load current distortion and to provide power factor correction. Current distortion compensation and power factor correction can be provided either separately or combined to provide total compensation. Experimental results illustrating the system´s ability to reduce the current harmonic distortion components and provide power factor correction are presented. The design of an intelligent controller, using a TMS320C30 digital signal processor, for the compensation system is also discussed