FUZZY-LOGIC CONTROL OF A SPACE-VECTOR PWM CURRENT REGULATOR FOR 3-PHASE POWER CONVERTERS

This paper presents a fuzzy logic implementation of space-vector pulse -width modulation (PWM) for three-phase power converters. The conventi onal space-vector PWM current regulator implementation is generally co mputationally complex. The fuzzy logic controller implementation relie ves the processor of a number of computations, thereby accommodating a less expensive microprocessor, The ac-side rectifier voltages are use d as fuzzy-state variables. The fuzzy logic control has two outputs: m agnitude and angle of reference voltage. Both conventional space-vecto r PWM and the fuzzy logic controller are implemented to evaluate perfo rmance using a 16-b microcontroller (68HC16), Experimental results are provided for both controllers at the same operating point, where the power drawn by the load is about 3 kW, The fuzzy logic controller redu ces the computational burden on the processor by about 30%.