Model predictive current control of a proposed single-switch three-level active rectifier applied to EV battery chargers

This paper presents a model predictive current control applied to a new topology of single-switch three-level (SSTL) active rectifier, which is exemplified in an application for single-phase battery charger for electric vehicles (EVs). During each sampling period, this current control scheme selects the state of the SSTL active rectifier to minimize the error between the grid current and its reference. Using this strategy it is possible to obtain sinusoidal grid current with low total harmonic distortion and unitary power factor, which is one of the main requirements for EVs chargers. The paper presents in detail the operating principle of the SSTL active rectifier, the digital control algorithm, and the EV battery charger incorporating the SSTL active rectifier used for the experimental verification. The obtained results confirm the correct application of the model predictive current control applied to the proposed SSTL active rectifier.